毕业设计_英语专业论文外文翻译
毕业设计(论文)外文翻译(原文)
编号:毕业设计(论文)外文翻译(原文)院(系):桂林电子科技大学职业技术学院专业:工商企业管理学生姓名:方智立学号:010*********指导教师单位:桂林电子科技大学职业技术学院姓名:朱芸芸职称:讲师2016年 4 月 1 日Marketing Strategy Analysis of SportsAbstractSports market is a special industry market, which for provide exchange of sports tangible products and services market. Sports market including fixed type, such as sports facilities, sports goods market, Mobile market, such as all kinds of sports service provided by the fitness club. Sports tourism and advertising business, sports goods should be consumers to accept, and occupy a larger market. If success of the sports marketing involves many factors. According to the specific characteristics of sports marketing, develop and implement appropriate marketing strategy is very important. Sports marketing strategy is to the sports business units within a certain period or stage marketing campaign's overall development plan of decision making.This paper argues that the marketing strategy can be further subdivided into market positioning strategy, market timing strategy, market entry strategy, market development strategy, market competition strategy, Choose a strategy, must conform to the enterprise's own competitive position, product status, to grasp the market opportunity, determined according to the demands of consumers. In this paper, the sports market segmentation marketing strategy for the market positioning strategy, market timing strategy, market entry strategy, market development strategy, market competition strategy, and discusses the sports marketing how to carry out strategic choice.Keywords: Sports bazaar ; Sports marketing; Marketing strategy1.Sports marketing strategy and characteristics1.1Sports marketing strategyStrategy refers to the planning of overall and profound things. Sports marketing strategy refers to the commodity business units under the guidance of modern marketing concept, to achieve its economic goal for enterprise in a certain period of the overall design and planning of marketing development.Inan increasingly competitive market circumstances, sports business units in order to effectively carry out business activities, to achieve its business objectives, must understand and based on the characteristics of marketing concepts and strategies, and Target the demand of the market, comprehensive analysis and marketing of various environmental factors, choose effective market strategy in the background.1.2The characteristics of the sports marketing strategySports marketing strategy has sports business units within a certain period or stage marketing campaign's overall development plan of decision making. It has the characteristics of the following.(1) Overall importance.Sports marketing strategy is a matter of the global business units, including two aspects the meaning of this global:on the one hand, Sports marketing strategy is the overall design, the development of the business units, including overall planning and the overall strategy and means.On the other hand, Sports marketing strategy decision is a matter of global business units and their all-round development in the future.(2)Secular.Sports marketing strategy is really about the future of sports business units: to achieve the goals of sports marketing strategy, will make the sports business units to produce qualitative leap, but this is not usually that can be done in the short term.Important, sports business units of marketing strategy on the strategic period not only very important to enterprise's survival and development, but also to the long-term development of enterprises play an important role.(3) Systematicness.Sports systemic marketing refers to business units, each part of the work of each link is a contact each other, are closely related to the organic unity of the whole.System have layers, the size and the primary and secondary division, at the next lower level to obey and serve at the next higher level.For a certain sports and business operation entity, the strategy of the whole enterprise as a whole system engineering to overall arrangement, the pursuit of the overall development of the biggest benefits.(4)Adaptability.Sports marketing adaptability, refers to the sports marketing and business operation entity is easily affected by external and internal environment, when the environment changes, sports business units made to adapt themselves to the new environment of the characteristics of rapid response.Sports marketing of the external environment including the market demand, political or economic situation changes, policy and law changes. Similarly, sports business entities internal conditions change will impact on marketing.(5)Risk.Due to sports marketing strategy is the business unit for the marketing activities during the period development collection of expected decision, and this decision is absolutely impossible in various conditions fully mature and information fully, make and sports market, especially the intangible product variety and complexity of the market, make sports marketing strategy has the characteristics of uncertainty and instantaneity, many market opportunities tend to be a passes, no longer to, opportunity and risk coexist.2.Sports marketing strategy comprisedand choiceSports marketing strategies mainly include market positioning strategy, market timing strategy, market entry strategy, market development strategy, market competition strategy.2.1 Market orientation strategyMarket positioning refers to the sports business units according to the condition of market competition situation and its own resources, establish and develop differentiated competitive advantage, to make their own products in the consumer formed in the difference between each product unique image and is superior to the competition.This unique image can be tangible or intangible.Enterprise after analyzing the market environment, should highlight its own market advantage, establish market position, Which companies need to know on a certain level of paper generalizes, consumers mind what is the best sports products as expected.2.2 Market entry policyMarket entry strategy is the sports business units at the right time to capture the target market, how to appropriately in the two aspects of production capacity and sales ability to make reliable measures and guarantee, to ensure the decision-making of sports products successfully enter the market.Its content mainly includes the production capacity of decision-making and sales ability to form two aspects.(1) Capacity Decision. In the necessary time, sports business entities formtargetmarket capacity, is one of the important conditions to achieve market goal.Regardless of whether they are sports tangible products and intangible products, generally there are two alternative strategies.①Independent development strategy refers to both tangible products, the development of sports and development of sports intangible products. All on its own strength to expand production scale, enhance the comprehensive production capacity or adjust the structure of the comprehensive production capacity of enterprise, to adapt the demand of product combination structure. ②Comprehensive development strategy, mainly depend on the sports business units of the external forces, namely, through joint, collaboration, subcontract, form a new comprehensive production capacity. Due to participating in planning, control, coordination, etc, are more difficult. Therefore, sports business units must be good at optimizing collaborator, deal with the various cooperation of responsibility, right and benefit, to maintain good relations of cooperation.(2) Sales ability decision. A sports product to enter and occupy the market, production enterprise must have the necessary sales ability and the ability to penetrate the market.Sales ability decision-making main consideration circulation channels and sales, product should be considered when making decisions, market, enterprise, social environment and the factors such as economic effect.2.3 Market development strategyMarket development strategy refers to the perspective of market prospects, the choice of market development means, usually includes two kinds of intensive development and diversified development main form.(1)Intensive development.When some kind of sports products in the market has the potential of further development, the choice of market penetration, product development and market development of three kinds of intensive development form. As the tangible products market, in sports and intangible products are common market and applicable.①Market penetration. on the basis of the existing market scale, increase the sales of existing products. Can use a variety of measures, consolidate old customers, increase the new user. ②Product development Is through developing and improving existing products, make its have some new properties and USES, meet the social demand more. ③market development. Refers to an enterprise that open up new product sales market, in order to increase sales.(2) Diversified development.Diversity is also called the diversification, basically have concentricity scattered scattered, horizontal dispersion and the integrityof three. ①Concentricity is sports business unit USES the original dispersed development technology and the characteristics, with its as the core, the development use different structure similar products. ②Scattered level of sexual development.Was used in the original market advantage, has occupied the market development of technology, nature and purpose of different products. For example, Sports club olicy makers, can through the player transfer channels, to sell players, profit.Others use their sports club or the player's social awareness to participate in the sales promotion of goods, in order to obtain profits. ③Integrity of dispersed development. Refers to the sports business units to expand the business into its original business, technology, market and the product has no connection in the industry. Such as the sports department construction and run a catering and service hotels, hotels, entertainment city, charge for parking lot, etc., is the form of scattered holistic development. Implement the diversification development, can improve the ability of sports business units to adapt to the environment, reduce the risk of a single business, at the same time, may be more fully use of all kinds of resources within the enterprise, make its have more potential development opportunities. However, the development of decentralized often leads to complication of operation and management, and business operation entities such as diversifying some problems.2.4Strategic Marketing CompetitionThe rules of the development of the market is superior bad discard, its characteristic is the petition can promote the economic development of the enterprise and the improvement of economic benefits.Enterprises should establish a clear concept of competition, flexible use of price and non-price competition means, take a man without I have, people have my good, good people knew, new I cheap, cheap I turn the principle and method of making enterprise competitive strategy, must accomplish know fairly well the competition environment and competition situation, can with ease.Enterprise competition environment factors mainly refers to the enterprise in addition to the social and cultural environment stress factors of various aspects, such as management scientist professor Michael porter of Harvard University famous the competitive offer slightly above, an enterprise usually exist competition pressure from five aspects, namely the industry competition pressure, potential to join the pressure from the industry, suppliers forward pressure (by providing raw materials or semi-finished products, to develop into their production products), buyers.(1) The overall competitive strategy. Under different conditions, the enterprise facing the pressure of competition is different, the analysis of the pressure of competition is to understand the purpose of each kind of competition situation of power, so as to make effective competition strategy.Under normal circumstances, the sports business units of competition strategy in general have a low cost strategy, product differentiation strategy and intensive strategy. ①low-cost strategy. Low cost strategy is to point to in under the premise of guarantee the quality of products and services, efforts to reduce the cost of production and sales so that the enterprise product prices lower than competitors' prices, with rapidly expanding sales increase market share. ②Product differentiation strategies. Product differentiation strategy is to point to create a unique characteristic of the enterprise products, to develop unique products or marketing programs, for in such aspects as product or service than competitors are unique. Thus to obtain the difference advantage.The United States, for example, "NIKE" brand sports shoes, NIKE production due to the appearance of novel design, the innovation of the use function and unique, and exquisite packaging, etc., although the price is surprisingly expensive, but occupies considerable market in China, the teenagers are very loving. ③Intensive strategy. Intensive strategy refers to the enterprises focus on one or several market segments provide the most effective service, better meet certain customers with different needs, so as to strive for the local competitive advantage. It is little different from the above three kinds of overall competition strategy, successfully implement these three strategies need different resources and decision-making, also should have different requirements on organization and management.(2) The competitive strategy of enterprises of different competitive position. Where the status of enterprise in market competition, the enterprise can be divided into: market leader, market challenger, market follower. Different competitive position of enterprises, should choose different market competitive strategy.①Dominant market competition strategy. Market power refers to the related products has the highest market share. Such as the current market position and stable dominated by clothing JinMeiLong, "ADIDAS", they are price changes, new product development, sales channel width and promotional efforts in a dominant position, recognized by other sports enterprises. ②The challenger market competition strategy. Market challenger refers to those in a secondary position in the market of the enterprise, such as "lining" brand garment enterprises .Market challenger to choosechallenge object is closely related to the strategic target, for a same object has different goals and strategies Such as attack market leader to gain the market share and product advantage ;Attack power with yourself quite seize its market position; Attacking small businesses taking their customers even small business itself."Lining" to win market price advantage to the international brand, with product quality advantages to gain "anta" challenger "peak" brand's market share. ③Followers of the market competition strategy. Market followers is to point to in a secondary position, under the conditions of "coexistence" market for as much as possible the benefit of the enterprise. Market followers don't need a lot of money, less risky and can obtain high profits, so many enterprises adopt this strategy, especially the sort of small or no fame and status of sports clothing enterprises. As the current sports "philharmonic" brand clothing enterprise in the enterprise.Reference[1] LiJianJun,WangCuiHua:The Research on Marketing Environment Enterprise of Things for Sports Use in China[J] Journal of NanJing institute of sport (social science edition) 2013.(10),36 ~ 48.[2] Discuss Sports market, products and marketing characteristics. [J] journal of xi ' an institute of physical education,2012.(3)101 ~109.[3] HuZhengMing Ed. Marketing Management[M].Shandong people's publishing house,2012.302 ~325.[4] [US]Kotler write. YuLiJun translate. Introduction to Marketing[M].Huaxia Publishing House,2011.333~389.[5] ZhangTongYao.Application areas to promote the marketing advantage analysis of third party logistics[J].Market of China,2010(3)128 ~136.[6] WangHuaiShu.The influence of the logistics quality of marketing[J].Teacher's Journal,2010(3)31 ~38.[7] WangChenWen.Shallow theory of logistics strategy in the role of marketing management[J].Chemical Enterprise Management,2009(7)175 ~178.。
毕业设计外文翻译_英文版
A Design and Implementation of Active NetworkSocket ProgrammingK.L. Eddie Law, Roy LeungThe Edward S. Rogers Sr. Department of Electrical and Computer EngineeringUniversity of TorontoToronto, Canadaeddie@, roy.leung@utoronto.caAbstract—The concept of programmable nodes and active networks introduces programmability into communication networks. Code and data can be sent and modified on their ways to destinations. Recently, various research groups have designed and implemented their own design platforms. Each design has its own benefits and drawbacks. Moreover, there exists an interoperability problem among platforms. As a result, we introduce a concept that is similar to the network socket programming. We intentionally establish a set of simple interfaces for programming active applications. This set of interfaces, known as Active Network Socket Programming (ANSP), will be working on top of all other execution environments in future. Therefore, the ANSP offers a concept that is similar to “write once, run everywhere.” It is an open programming model that active applications can work on all execution environments. It solves the heterogeneity within active networks. This is especially useful when active applications need to access all regions within a heterogeneous network to deploy special service at critical points or to monitor the performance of the entire networks. Instead of introducing a new platform, our approach provides a thin, transparent layer on top of existing environments that can be easily installed for all active applications.Keywords-active networks; application programming interface; active network socket programming;I. I NTRODUCTIONIn 1990, Clark and Tennenhouse [1] proposed a design framework for introducing new network protocols for the Internet. Since the publication of that position paper, active network design framework [2, 3, 10] has slowly taken shape in the late 1990s. The active network paradigm allows program code and data to be delivered simultaneously on the Internet. Moreover, they may get executed and modified on their ways to their destinations. At the moment, there is a global active network backbone, the ABone, for experiments on active networks. Apart from the immaturity of the executing platform, the primary hindrance on the deployment of active networks on the Internet is more on the commercially related issues. For example, a vendor may hesitate to allow network routers to run some unknown programs that may affect their expected routing performance. As a result, alternatives were proposed to allow active network concept to operate on the Internet, such as the application layer active networking (ALAN) project [4] from the European research community. In the ALAN project, there are active server systems located at different places in the networks and active applications are allowed to run in these servers at the application layer. Another potential approach from the network service provider is to offer active network service as the premium service class in the networks. This service class should provide the best Quality of Service (QoS), and allow the access of computing facility in routers. With this approach, the network service providers can create a new source of income.The research in active networks has been progressing steadily. Since active networks introduce programmability on the Internet, appropriate executing platforms for the active applications to execute should be established. These operating platforms are known as execution environments (EEs) and a few of them have been created, e.g., the Active Signaling Protocol (ASP) [12] and the Active Network Transport System (ANTS) [11]. Hence, different active applications can be implemented to test the active networking concept.With these EEs, some experiments have been carried out to examine the active network concept, for example, the mobile networks [5], web proxies [6], and multicast routers [7]. Active networks introduce a lot of program flexibility and extensibility in networks. Several research groups have proposed various designs of execution environments to offer network computation within routers. Their performance and potential benefits to existing infrastructure are being evaluated [8, 9]. Unfortunately, they seldom concern the interoperability problems when the active networks consist of multiple execution environments. For example, there are three EEs in ABone. Active applications written for one particular EE cannot be operated on other platforms. This introduces another problem of resources partitioning for different EEs to operate. Moreover, there are always some critical network applications that need to run under all network routers, such as collecting information and deploying service at critical points to monitor the networks.In this paper, a framework known as Active Network Socket Programming (ANSP) model is proposed to work with all EEs. It offers the following primary objectives.• One single programming interface is introduced for writing active applications.• Since ANSP offers the programming interface, the design of EE can be made independent of the ANSP.This enables a transparency in developing andenhancing future execution environments.• ANSP addresses the interoperability issues among different execution environments.• Through the design of ANSP, the pros and cons of different EEs will be gained. This may help design abetter EE with improved performance in future.The primary objective of the ANSP is to enable all active applications that are written in ANSP can operate in the ABone testbed . While the proposed ANSP framework is essential in unifying the network environments, we believe that the availability of different environments is beneficial in the development of a better execution environment in future. ANSP is not intended to replace all existing environments, but to enable the studies of new network services which are orthogonal to the designs of execution environments. Therefore, ANSP is designed to be a thin and transparent layer on top of all execution environments. Currently, its deployment relies on automatic code loading with the underlying environments. As a result, the deployment of ANSP at a router is optional and does not require any change to the execution environments.II. D ESIGN I SSUES ON ANSPThe ANSP unifies existing programming interfaces among all EEs. Conceptually, the design of ANSP is similar to the middleware design that offers proper translation mechanisms to different EEs. The provisioning of a unified interface is only one part of the whole ANSP platform. There are many other issues that need to be considered. Apart from translating a set of programming interfaces to other executable calls in different EEs, there are other design issues that should be covered, e.g., • a unified thread library handles thread operations regardless of the thread libraries used in the EEs;• a global soft-store allows information sharing among capsules that may execute over different environmentsat a given router;• a unified addressing scheme used across different environments; more importantly, a routing informationexchange mechanism should be designed across EEs toobtain a global view of the unified networks;• a programming model that should be independent to any programming languages in active networks;• and finally, a translation mechanism to hide the heterogeneity of capsule header structures.A. Heterogeneity in programming modelEach execution environment provides various abstractions for its services and resources in the form of program calls. The model consists of a set of well-defined components, each of them has its own programming interfaces. For the abstractions, capsule-based programming model [10] is the most popular design in active networks. It is used in ANTS [11] and ASP [12], and they are being supported in ABone. Although they are developed based on the same capsule model, their respective components and interfaces are different. Therefore, programs written in one EE cannot run in anther EE. The conceptual views of the programming models in ANTS and ASP are shown in Figure 1.There are three distinct components in ANTS: application, capsule, and execution environment. There exist user interfaces for the active applications at only the source and destination routers. Then the users can specify their customized actions to the networks. According to the program function, the applications send one or more capsules to carry out the operations. Both applications and capsules operate on top of an execution environment that exports an interface to its internal programming resources. Capsule executes its program at each router it has visited. When it arrives at its destination, the application at destination may either reply it with another capsule or presents this arrival event to the user. One drawback with ANTS is that it only allows “bootstrap” application.Figure 1. Programming Models in ASP and ANTS.In contrast, ASP does not limit its users to run “bootstrap” applications. Its program interfaces are different from ANTS, but there are also has three components in ASP: application client, environment, and AAContext. The application client can run on active or non-active host. It can start an active application by simply sending a request message to the EE. The client presents information to users and allows its users to trigger actions at a nearby active router. AAContext is the core of the network service and its specification is divided into two parts. One part specifies its actions at its source and destination routers. Its role is similar to that of the application in ANTS, except that it does not provide a direct interface with the user. The other part defines its actions when it runs inside the active networks and it is similar to the functional behaviors of a capsule in ANTS.In order to deal with the heterogeneity of these two models, ANSP needs to introduce a new set of programming interfaces and map its interfaces and execution model to those within the routers’ EEs.B. Unified Thread LibraryEach execution environment must ensure the isolation of instance executions, so they do not affect each other or accessThe authors appreciate the Nortel Institute for Telecommunications (NIT) at the University of Toronto to allow them to access the computing facilitiesothers’ information. There are various ways to enforce the access control. One simple way is to have one virtual machine for one instance of active applications. This relies on the security design in the virtual machines to isolate services. ANTS is one example that is using this method. Nevertheless, the use of multiple virtual machines requires relatively large amount of resources and may be inefficient in some cases. Therefore, certain environments, such as ASP, allow network services to run within a virtual machine but restrict the use of their services to a limited set of libraries in their packages. For instance, ASP provides its thread library to enforce access control. Because of the differences in these types of thread mechanism, ANSP devises a new thread library to allow uniform accesses to different thread mechanisms.C. Soft-StoreSoft-store allows capsule to insert and retrieve information at a router, thus allowing more than one capsules to exchange information within a network. However, problem arises when a network service can execute under different environments within a router. The problem occurs especially when a network service inserts its soft-store information in one environment and retrieves its data at a later time in another environment at the same router. Due to the fact that execution environments are not allowed to exchange information, the network service cannot retrieve its previous data. Therefore, our ANSP framework needs to take into account of this problem and provides soft-store mechanism that allows universal access of its data at each router.D. Global View of a Unified NetworkWhen an active application is written with ANSP, it can execute on different environment seamlessly. The previously smaller and partitioned networks based on different EEs can now be merging into one large active network. It is then necessary to advise the network topology across the networks. However, different execution environments have different addressing schemes and proprietary routing protocols. In order to merge these partitions together, ANSP must provide a new unified addressing scheme. This new scheme should be interpretable by any environments through appropriate translations with the ANSP. Upon defining the new addressing scheme, a new routing protocol should be designed to operate among environments to exchange topology information. This allows each environment in a network to have a complete view of its network topology.E. Language-Independent ModelExecution environment can be programmed in any programming language. One of the most commonly used languages is Java [13] due to its dynamic code loading capability. In fact, both ANTS and ASP are developed in Java. Nevertheless, the active network architecture shown in Figure 2 does not restrict the use of additional environments that are developed in other languages. For instance, the active network daemon, anted, in Abone provides a workspace to execute multiple execution environments within a router. PLAN, for example, is implemented in Ocaml that will be deployable on ABone in future. Although the current active network is designed to deploy multiple environments that can be in any programming languages, there lacks the tool to allow active applications to run seamlessly upon these environments. Hence, one of the issues that ANSP needs to address is to design a programming model that can work with different programming languages. Although our current prototype only considers ANTS and ASP in its design, PLAN will be the next target to address the programming language issue and to improve the design of ANSP.Figure 2. ANSP Framework Model.F. Heterogeneity of Capsule Header StructureThe structures of the capsule headers are different in different EEs. They carries capsule-related information, for example, the capsule types, sources and destinations. This information is important when certain decision needs to be made within its target environment. A unified model should allow its program code to be executed on different environments. However, the capsule header prevents different environments to interpret its information successfully. Therefore, ANSP should carry out appropriate translation to the header information before the target environment receives this capsule.III. ANSP P ROGRAMMING M ODELWe have outlined the design issues encountered with the ANSP. In the following, the design of the programming model in ANSP will be discussed. This proposed framework provides a set of unified programming interfaces that allows active applications to work on all execution environments. The framework is shown in Figure 2. It is composed of two layers integrated within the active network architecture. These two layers can operate independently without the other layer. The upper layer provides a unified programming model to active applications. The lower layer provides appropriate translation procedure to the ANSP applications when it is processed by different environments. This service is necessary because each environment has its own header definition.The ANSP framework provides a set of programming calls which are abstractions of ANSP services and resources. A capsule-based model is used for ANSP, and it is currently extended to map to other capsule-based models used in ANTSand ASP. The mapping possibility to other models remains as our future works. Hence, the mapping technique in ANSP allows any ANSP applications to access the same programming resources in different environments through a single set of interfaces. The mapping has to be done in a consistent and transparent manner. Therefore, the ANSP appears as an execution environment that provides a complete set of functionalities to active applications. While in fact, it is an overlay structure that makes use of the services provided from the underlying environments. In the following, the high-level functional descriptions of the ANSP model are described. Then, the implementations will be discussed. The ANSP programming model is based upon the interactions between four components: application client , application stub , capsule , and active service base.Figure 3. Information Flow with the ANSP.•Application Client : In a typical scenario, an active application requires some means to present information to its users, e.g., the state of the networks. A graphical user interface (GUI) is designed to operate with the application client if the ANSP runs on a non-active host.•Application Stub : When an application starts, it activates the application client to create a new instance of application stub at its near-by active node. There are two responsibilities for the application stub. One of them is to receive users’ instructions from the application client. Another one is to receive incoming capsules from networks and to perform appropriate actions. Typically, there are two types of actions, thatare, to reply or relay in capsules through the networks, or to notify the users regarding the incoming capsule. •Capsule : An active application may contain several capsule types. Each of them carries program code (also referred to as forwarding routine). Since the application defines a protocol to specify the interactions among capsules as well as the application stubs. Every capsule executes its forwarding routine at each router it visits along the path between the source and destination.•Active Service Base : An active service base is designed to export routers’ environments’ services and execute program calls from application stubs and capsules from different EEs. The base is loaded automatically at each router whenever a capsule arrives.The interactions among components within ANSP are shown in Figure 3. The designs of some key components in the ANSP will be discussed in the following subsections. A. Capsule (ANSPCapsule)ANSPXdr decode () ANSPXdr encode () int length ()Boolean execute ()New types of capsule are created by extending the abstract class ANSPCapsule . New extensions are required to define their own forwarding routines as well as their serialization procedures. These methods are indicated below:The execution of a capsule in ANSP is listed below. It is similar to the process in ANTS.1. A capsule is in serial binary representation before it issent to the network. When an active router receives a byte sequence, it invokes decode() to convert the sequence into a capsule. 2. The router invokes the forwarding routine of thecapsule, execute(). 3. When the capsule has finished its job and forwardsitself to its next hop by calling send(), this call implicitly invokes encode() to convert the capsule into a new serial byte representation. length() isused inside the call of encode() to determine the length of the resulting byte sequence. ANSP provides a XDR library called ANSPXdr to ease the jobs of encoding and decoding.B. Active Service Base (ANSPBase)In an active node, the Active Service Base provides a unified interface to export the available resources in EEs for the rest of the ANSP components. The services may include thread management, node query, and soft-store operation, as shown in Table 1.TABLE I. ACTIVE SERVICE BASE FUNCTION CALLSFunction Definition Descriptionboolean send (Capsule, Address) Transmit a capsule towards its destination using the routing table of theunderlying environment.ANSPAddress getLocalHost () Return address of the local host as an ANSPAddress structure. This isuseful when a capsule wants to check its current location.boolean isLocal (ANSPAddress) Return true if its input argument matches the local host’s address andreturn false otherwise.createThread () Create a new thread that is a class ofANSPThreadInterface (discussed later in Section VIA “Unified Thread Abstraction”).putSStore (key, Object) Object getSStore (key) removeSStore (key)The soft-store operations are provided by putSStore(), getSSTore(), and removeSStore(), and they put, retrieve, and remove data respectively. forName (PathName) Supported in ANSP to retrieve a classobject corresponding to the given path name in its argument. This code retrieval may rely on the code loading mechanism in the environment whennecessary.C. Application Client (ANSPClient)boolean start (args[])boolean start (args[],runningEEs) boolean start (args[],startClient)boolean start (args[],startClient, runningEE)Application Client is an interface between users and the nearby active source router. It does the following responsibilities.1. Code registration: It may be necessary to specify thelocation and name of the application code in some execution environments, e.g., ANTS. 2. Application initialization: It includes selecting anexecution environment to execute the application among those are available at the source router. Each active application can create an application client instance by extending the abstract class, ANSPClient . The extension inherits a method, start(), to automatically handle both the registration and initialization processes. All overloaded versions of start() accept a list of arguments, args , that are passed to the application stub during its initialization. An optional argument called runningEEs allows an application client to select a particular set of environment variables, specified by a list of standardized numerical environment ID, the ANEP ID, to perform code registration. If this argument is not specified, the default setting can only include ANTS and ASP. D. Application Stub (ANSPApplication)receive (ANSPCapsule)Application stubs reside at the source and destination routers to initialize the ANSP application after the application clients complete the initialization and registration processes. It is responsible for receiving and serving capsules from the networks as well as actions requested from the clients. A new instance is created by extending the application client abstract class, ANSPApplication . This extension includes the definition of a handling routine called receive(), which is invoked when a stub receives a new capsule.IV. ANSP E XAMPLE : T RACE -R OUTEA testbed has been created to verify the design correctnessof ANSP in heterogeneous environments. There are three types of router setting on this testbed:1. Router that contains ANTS and a ANSP daemonrunning on behalf of ASP; 2. Router that contains ASP and a ANSP daemon thatruns on behalf of ANTS; 3. Router that contains both ASP and ANTS.The prototype is written in Java [11] with a traceroute testing program. The program records the execution environments of all intermediate routers that it has visited between the source and destination. It also measures the RTT between them. Figure 4 shows the GUI from the application client, and it finds three execution environments along the path: ASP, ANTS, and ASP. The execution sequence of the traceroute program is shown in Figure 5.Figure 4. The GUI for the TRACEROUTE Program.The TraceCapsule program code is created byextending the ANSPCapsule abstract class. When execute() starts, it checks the Boolean value of returning to determine if it is returning from the destination. It is set to true if TraceCapsule is traveling back to the source router; otherwise it is false . When traveling towards the destination, TraceCapsule keeps track of the environments and addresses of the routers it has visited in two arrays, path and trace , respectively. When it arrives at a new router, it calls addHop() to append the router address and its environment to these two arrays. When it finally arrives at the destination, it sets returning to false and forwards itself back to the source by calling send().When it returns to source, it invokes deliverToApp() to deliver itself to the application stub that has been running at the source. TraceCapsule carries information in its data field through the networks by executing encode() and decode(), which encapsulates and de-capsulates its data using External Data Representation (XDR) respectively. The syntax of ANSP XDR follows the syntax of XDR library from ANTS. length() in TraceCapsule returns the data length, or it can be calculated by using the primitive types in the XDRlibrary.Figure 5. Flow of the TRACEROUTE Capsules.V. C ONCLUSIONSIn this paper, we present a new unified layered architecture for active networks. The new model is known as Active Network Socket Programming (ANSP). It allows each active application to be written once and run on multiple environments in active networks. Our experiments successfully verify the design of ANSP architecture, and it has been successfully deployed to work harmoniously with ANTS and ASP without making any changes to their architectures. In fact, the unified programming interface layer is light-weighted and can be dynamically deployable upon request.R EFERENCES[1] D.D. Clark, D.L. Tennenhouse, “Architectural Considerations for a NewGeneration of Protocols,” in Proc. ACM Sigcomm’90, pp.200-208, 1990. [2] D. Tennenhouse, J. M. Smith, W. D. Sicoskie, D. J. Wetherall, and G. J.Minden, “A survey of active network research,” IEEE Communications Magazine , pp. 80-86, Jan 1997.[3] D. Wetherall, U. Legedza, and J. Guttag, “Introducing new internetservices: Why and how,” IEEE Network Magazine, July/August 1998. [4] M. Fry, A. Ghosh, “Application Layer Active Networking,” in ComputerNetworks , Vol.31, No.7, pp.655-667, 1999.[5] K. W. Chin, “An Investigation into The Application of Active Networksto Mobile Computing Environments”, Curtin University of Technology, March 2000.[6] S. Bhattacharjee, K. L. Calvert, and E. W. Zegura, “Self OrganizingWide-Area Network Caches”, Proc. IEEE INFOCOM ’98, San Francisco, CA, 29 March-2 April 1998.[7] L. H. Leman, S. J. Garland, and D. L. Tennenhouse, “Active ReliableMulticast”, Proc. IEEE INFOCOM ’98, San Francisco, CA, 29 March-2 April 1998.[8] D. Descasper, G. Parulkar, B. Plattner, “A Scalable, High PerformanceActive Network Node”, In IEEE Network, January/February 1999.[9] E. L. Nygren, S. J. Garland, and M. F. Kaashoek, “PAN: a high-performance active network node supporting multiple mobile code system”, In the Proceedings of the 2nd IEEE Conference on Open Architectures and Network Programming (OpenArch ’99), March 1999. [10] D. L. Tennenhouse, and D. J. Wetherall. “Towards an Active NetworkArchitecture”, In Proceeding of Multimedia Computing and Networking , January 1996.[11] D. J. Wetherall, J. V. Guttag, D. L. Tennenhouse, “ANTS: A toolkit forBuilding and Dynamically Deploying Network Protocols”, Open Architectures and Network Programming, 1998 IEEE , 1998 , Page(s): 117 –129.[12] B. Braden, A. Cerpa, T. Faber, B. Lindell, G. Phillips, and J. Kann.“Introduction to the ASP Execution Environment”: /active-signal/ARP/index.html .[13] “The java language: A white paper,” Tech. Rep., Sun Microsystems,1998.。
本科毕业设计外文翻译(中文)
本科生毕业设计(论文)外文翻译外文原文题目:Real-time interactive optical micromanipulation of a mixture of high- and low-index particles中文翻译题目:高低折射率微粒混合物的实时交互式光学微操作毕业设计(论文)题目:阵列光镊软件控制系统设计姓名:任有健学院:生命学院班级:06210501指导教师:李勤高低折射率微粒混合物的实时交互式光学微操作Peter John Rodrigo Vincent Ricardo Daria Jesper Glückstad丹麦罗斯基勒DK-4000号,Risø国家实验室光学和等离子研究系jesper.gluckstad@risoe.dkhttp://www.risoe.dk/ofd/competence/ppo.htm摘要:本文论证一种对于胶体的实时交互式光学微操作的方法,胶体中包含两种折射率的微粒,与悬浮介质(0n )相比,分别低于(0L n n <)、高于(0H n n >)悬浮介质的折射率。
球形的高低折射率微粒在横平板上被一批捕获激光束生成的约束光势能捕获,捕获激光束的横剖面可以分为“礼帽形”和“圆环形”两种光强剖面。
这种应用方法在光学捕获的空间分布和个体几何学方面提供了广泛的可重构性。
我们以实验为基础证实了同时捕获又独立操作悬浮于水(0 1.33n =)中不同尺寸的球形碳酸钠微壳( 1.2L n ≈)和聚苯乙烯微珠( 1.57H n =)的独特性质。
©2004 美国光学学会光学分类与标引体系编码:(140.7010)捕获、(170.4520)光学限制与操作和(230.6120)空间光调制器。
1 引言光带有动量和角动量。
伴随于光与物质相互作用的动量转移为我们提供了在介观量级捕获和操作微粒的方法。
过去数十年中的巨大发展已经导致了在生物和物理领域常规光学捕获的各种应用以及下一代光学微操作体系的出现[1-5]。
毕业设计英文作文范文
毕业设计英文作文范文Title: The Importance of the Graduation Project in Academic Development。
The graduation project holds a pivotal role in the academic journey of students. It serves as a culmination of years of learning, a platform to showcase acquired skills, and an opportunity to delve deep into a specific subject matter. In this essay, I will elaborate on the significance of the graduation project and its impact on academic development.Firstly, the graduation project fosters independent learning and critical thinking skills. Unlike regular coursework where the parameters are often well-defined, the graduation project requires students to identify a research question or a problem statement independently. This process necessitates thorough literature review, data collection, and analysis, thereby honing research and analytical abilities. Moreover, formulating hypotheses, designingexperiments, or proposing solutions demand creativethinking and problem-solving skills, which are essentialfor academic and professional success.Secondly, the graduation project encourages interdisciplinary learning and collaboration. Many projects involve aspects from various fields, prompting students to integrate knowledge acquired from different courses. This interdisciplinary approach not only enriches the project but also broadens students' perspectives, enabling them to appreciate the interconnectedness of different subjects. Furthermore, collaboration with peers, mentors, or industry professionals enhances teamwork, communication, and project management skills, which are indispensable in any academic or professional setting.Additionally, the graduation project cultivates resilience and perseverance. Research, by its nature, is fraught with challenges, setbacks, and uncertainties. Students encounter obstacles ranging from experimental failures to data inconsistencies, requiring them to adapt, troubleshoot, and persist in the face of adversity.Overcoming these hurdles instills resilience and fortitude, attributes that are invaluable not only in academia but also in life.Moreover, the graduation project offers a platform for personal and intellectual growth. It provides students with the autonomy to explore topics of their interest, delveinto uncharted territories, and push the boundaries of knowledge. This journey of self-discovery not only enhances academic curiosity but also fosters a sense of ownership and accomplishment. Furthermore, presenting findings, defending arguments, and receiving feedback during project evaluations contribute to the development of presentation, communication, and critical evaluation skills, which are essential for academic and professional success.In conclusion, the graduation project is a cornerstone of academic development, offering students a unique opportunity to apply theoretical knowledge to real-world problems, fostering independent learning, interdisciplinary collaboration, resilience, and personal growth. By engaging in this endeavor, students not only demonstrate theiracademic prowess but also equip themselves with essential skills and attributes for future endeavors. Therefore, the graduation project stands as a testament to the culmination of academic journey and the beginning of a new chapter in students' intellectual and professional pursuits.。
毕业设计论文外文文献翻译
毕业设计(论文)外文文献翻译院系:财务与会计学院年级专业:201*级财务管理姓名:学号:132148***附件: 财务风险管理【Abstract】Although financial risk has increased significantly in recent years risk and risk management are not contemporary issues。
The result of increasingly global markets is that risk may originate with events thousands of miles away that have nothing to do with the domestic market。
Information is available instantaneously which means that change and subsequent market reactions occur very quickly。
The economic climate and markets can be affected very quickly by changes in exchange rates interest rates and commodity prices。
Counterparties can rapidly become problematic。
As a result it is important to ensure financial risks are identified and managed appropriately. Preparation is a key component of risk management。
【Key Words】Financial risk,Risk management,YieldsI. Financial risks arising1.1What Is Risk1.1.1The concept of riskRisk provides the basis for opportunity. The terms risk and exposure have subtle differences in their meaning. Risk refers to the probability of loss while exposure is the possibility of loss although they are often used interchangeably。
英语专业毕业设计模板范文
英语专业毕业设计模板范文英文回答:Introduction.The English language is a global language, and it is essential for communication in many different fields. As an English major, I have studied the English language and its literature extensively. For my capstone project, I will be developing a new curriculum for teaching English as a second language (ESL). I believe that this curriculum will help ESL students to learn English effectively and efficiently.Literature Review.There is a large body of research on the teaching of ESL. Some of the most important findings from this research include the following:ESL students need to be exposed to authentic English materials.ESL students need to have opportunities to practice speaking and listening to English.ESL students need to be given feedback on their progress.ESL students need to be motivated to learn English.Curriculum Development.I have developed a new ESL curriculum that incorporates the findings from the research literature. This curriculum is designed to be used in a variety of settings, including schools, community colleges, and workplace training programs. The curriculum includes the following components:Authentic English materials.Opportunities for speaking and listening practice.Feedback on progress.Motivational activities.Assessment.I will assess the effectiveness of my curriculum by using a variety of methods, including:Student surveys.Teacher observations.Standardized tests.I believe that my ESL curriculum will be effective in helping ESL students to learn English. This curriculum is based on the latest research on the teaching of ESL, and it includes a variety of components that are essential for effective language learning.Conclusion.I am excited to implement my new ESL curriculum and to see the positive impact that it has on my students. Ibelieve that this curriculum will help ESL students to achieve their goals of learning English and becoming successful in their studies, careers, and personal lives.中文回答:引言。
道路桥梁专业 中英文对照---毕业设计论文 外文文献翻译
附录一英文翻译原文AUTOMATIC DEFLECTION AND TEMPERATURE MONITORING OFA BALANCED CANTILEVER CONCRETE BRIDGEby Olivier BURDET, Ph.D.Swiss Federal Institute of Technology, Lausanne, SwitzerlandInstitute of Reinforced and Prestressed Concrete SUMMARYThere is a need for reliable monitoring systems to follow the evolution of the behavior of structures over time.Deflections and rotations are values that reflect the overall structure behavior. This paper presents an innovative approach to the measurement of long-term deformations of bridges by use of inclinometers. High precision electronic inclinometers can be used to follow effectively long-term rotations without disruption of the traffic. In addition to their accuracy, these instruments have proven to be sufficiently stable over time and reliable for field conditions. The Mentue bridges are twin 565 m long box-girder post-tensioned concrete highway bridges under construction in Switzerland. The bridges are built by the balanced cantilever method over a deep valley. The piers are 100 m high and the main span is 150 m. A centralized data acquisition system was installed in one bridge during its construction in 1997. Every minute, the system records the rotation and temperature at a number of measuring points. The simultaneous measurement of rotations and concrete temperature at several locations gives a clear idea of the movements induced by thermal conditions. The system will be used in combination with a hydrostatic leveling setup to follow the long-term behavior of the bridge. Preliminary results show that the system performs reliably and that the accuracy of the sensors is excellent.Comparison of the evolution of rotations and temperature indicate that the structure responds to changes in air temperature rather quickly.1.BACKGROUNDAll over the world, the number of structures in service keeps increasing. With the development of traffic and the increased dependence on reliable transportation, it is becoming more and more necessary to foresee and anticipate the deterioration of structures. In particular,for structures that are part of major transportation systems, rehabilitation works need to be carefully planned in order to minimize disruptions of traffic. Automatic monitoring of structures is thus rapidly developing.Long-term monitoring of bridges is an important part of this overall effort to attempt to minimize both the impact and the cost of maintenance and rehabilitation work of major structures. By knowing the rate of deterioration of a given structure, the engineer is able to anticipate and adequately define the timing of required interventions. Conversely, interventions can be delayed until the condition of the structure requires them, without reducing the overall safety of the structure.The paper presents an innovative approach to the measurement of long-term bridge deformations. The use of high precision inclinometers permits an effective, accurate and unobtrusive following of the long-term rotations. The measurements can be performed under traffic conditions. Simultaneous measurement of the temperature at several locations gives a clear idea of the movements induced by thermal conditions and those induced by creep and shrinkage. The system presented is operational since August 1997 in the Mentue bridge, currently under construction in Switzerland. The structure has a main span of 150 m and piers 100 m high.2. LONG-TERM MONITORING OF BRIDGESAs part of its research and service activities within the Swiss Federal Institute of Technology in Lausanne (EPFL), IBAP - Reinforced and Prestressed Concrete has been involved in the monitoring of long-time deformations of bridges and other structures for over twenty-five years [1, 2, 3, 4]. In the past, IBAP has developed a system for the measurement of long-term deformations using hydrostatic leveling [5, 6]. This system has been in successful service in ten bridges in Switzerland for approximately ten years [5,7]. The system is robust, reliable and sufficiently accurate, but it requires human intervention for each measurement, and is not well suited for automatic data acquisition. One additional disadvantage of this system is that it is only easily applicable to box girder bridges with an accessible box.Occasional continuous measurements over periods of 24 hours have shown that the amplitude of daily movements is significant, usually amounting to several millimeters over a couple of hours. This is exemplified in figure 1, where measurements of the twin Lutrive bridges, taken over a period of several years before and after they were strengthened by post-tensioning, areshown along with measurements performed over a period of 24 hours. The scatter observed in the data is primarily caused by thermal effects on the bridges. In the case of these box-girder bridges built by the balanced cantilever method, with a main span of 143.5 m, the amplitude of deformations on a sunny day is of the same order of magnitude than the long term deformation over several years.Instantaneous measurements, as those made by hydrostatic leveling, are not necessarily representative of the mean position of the bridge. This occurs because the position of the bridge at the time of the measurement is influenced by the temperature history over the past several hours and days. Even if every care was taken to perform the measurements early in the morning and at the same period every year, it took a relatively long time before it was realized that the retrofit performed on the Lutrive bridges in 1988 by additional post-tensioning [3, 7,11] had not had the same effect on both of them.Figure 1: Long-term deflections of the Lutrive bridges, compared to deflections measured in a 24-hour period Automatic data acquisition, allowing frequent measurements to be performed at an acceptable cost, is thus highly desirable. A study of possible solutions including laser-based leveling, fiber optics sensors and GPS-positioning was performed, with the conclusion that, provided that their long-term stability can be demonstrated, current types of electronic inclinometers are suitable for automatic measurements of rotations in existing bridges [8].3. MENTUE BRIDGESThe Mentue bridges are twin box-girder bridges that will carry the future A1 motorway from Lausanne to Bern. Each bridge, similar in design, has an overall length of approximately 565 m, and a width of 13.46 m, designed to carry two lanes of traffic and an emergency lane. The bridges cross a deep valley with steep sides (fig. 2). The balanced cantilever design results from a bridge competition. The 100 m high concrete piers were built using climbing formwork, after which the construction of the balanced cantilever started (fig. 3).4. INCLINOMETERSStarting in 1995, IBAP initiated a research project with the goal of investigating the feasibility of a measurement system using inclinometers. Preliminary results indicated that inclinometers offer several advantages for the automatic monitoring of structures. Table 1 summarizes the main properties of the inclinometers selected for this study.One interesting property of measuring a structure’s rotations, is that, for a given ratio of maximum deflection to span length, the maximum rotation is essentially independent from its static system [8]. Since maximal allowable values of about 1/1,000 for long-term deflections under permanent loads are generally accepted values worldwide, developments made for box-girder bridges with long spans, as is the case for this research, are applicable to other bridges, for instance bridges with shorter spans and other types of cross-sections. This is significant because of the need to monitor smaller spans which constitute the majority of all bridges.The selected inclinometers are of type Wyler Zerotronic ±1°[9]. Their accuracy is 1 microradian (μrad), which corresponds to a rotation of one millimeter per kilometer, a very small value. For an intermediate span of a continuous beam with a constant depth, a mid-span deflection of 1/20,000 would induce a maximum rotation of about 150 μrad, or 0.15 milliradians (mrad).One potential problem with electronic instruments is that their measurements may drift overtime. To quantify and control this problem, a mechanical device was designed allowing the inclinometers to be precisely rotated of 180° in an horizontal plane (fig. 4). The drift of each inclinometer can be very simply obtained by comparing the values obtained in the initial and rotated position with previously obtained values. So far, it has been observed that the type of inclinometer used in this project is not very sensitive to drifting.5. INSTRUMENTATION OF THE MENTUE BRIDGESBecause a number of bridges built by the balanced cantilever method have shown an unsatisfactory behavior in service [2, 7,10], it was decided to carefully monitor the evolution of the deformations of the Mentue bridges. These bridges were designed taking into consideration recent recommendations for the choice of the amount of posttensioning [7,10,13]. Monitoring starting during the construction in 1997 and will be pursued after the bridges are opened to traffic in 2001. Deflection monitoring includes topographic leveling by the highway authorities, an hydrostatic leveling system over the entire length of both bridges and a network of inclinometers in the main span of the North bridge. Data collection iscoordinated by the engineer of record, to facilitate comparison of measured values. The information gained from these observations will be used to further enhance the design criteria for that type of bridge, especially with regard to the amount of post-tensioning [7, 10, 11, 12, 13].The automatic monitoring system is driven by a data acquisition program that gathers and stores the data. This system is able to control various types of sensors simultaneously, at the present time inclinometers and thermal sensors. The computer program driving all the instrumentation offers a flexible framework, allowing the later addition of new sensors or data acquisition systems. The use of the development environment LabView [14] allowed to leverage the large user base in the field of laboratory instrumentation and data analysis. The data acquisition system runs on a rather modest computer, with an Intel 486/66 Mhz processor, 16 MB of memory and a 500 MB hard disk, running Windows NT. All sensor data are gathered once per minute and stored in compressed form on the hard disk. The system is located in the box-girder on top of pier 3 (fig. 5). It can withstand severe weather conditions and will restart itself automatically after a power outage, which happened frequently during construction.6. SENSORSFigure 5(a) shows the location of the inclinometers in the main span of the North bridge. The sensors are placed at the axis of the supports (①an d⑤), at 1/4 and 3/4 (③an d④) of the span and at 1/8 of the span for②. In the cross section, the sensors are located on the North web, at a height corresponding to the center of gravity of the section (fig.5a). The sensors are all connected by a single RS-485 cable to the central data acquisition system located in the vicinity of inclinometer ①. Monitoring of the bridge started already during its construction. Inclinometers①,②and③were installed before the span was completed. The resulting measurement were difficult to interpret, however, because of the wide variations of angles induced by the various stages of this particular method of construction.The deflected shape will be determined by integrating the measured rotations along the length of the bridge (fig.5b). Although this integration is in principle straightforward, it has been shown [8, 16] that the type of loading and possible measurement errors need to be carefully taken into account.Thermal sensors were embedded in concrete so that temperature effects could be taken into account for the adjustment of the geometry of the formwork for subsequent casts. Figure 6 shows the layout of thermal sensors in the main span. The measurement sections are located at the same sections than the inclinometers (fig. 5). All sensors were placed in the formwork before concreting and were operational as soon as the formwork was removed, which was required for the needs of the construction. In each section, seven of the nine thermal sensor (indicated in solid black in fig. 6) are now automatically measured by the central data acquisition system.7. RESULTSFigure 7 shows the results of inclinometry measurements performed from the end ofSeptember to the third week of November 1997. All inclinometers performed well during that period. Occasional interruptions of measurement, as observed for example in early October are due to interruption of power to the system during construction operations. The overall symmetry of results from inclinometers seem to indicate that the instruments drift is not significant for that time period. The maximum amplitude of bridge deflection during the observed period, estimated on the basis of the inclinometers results, is around 40 mm. More accurate values will be computed when the method of determination ofdeflections will have been further calibrated with other measurements. Several periods of increase, respectively decrease, of deflections over several days can be observed in the graph. This further illustrates the need for continuous deformation monitoring to account for such effects. The measurement period was .busy. in terms of construction, and included the following operations: the final concrete pours in that span, horizontal jacking of the bridge to compensate some pier eccentricities, as well as the stressing of the continuity post-tensioning, and the de-tensioning of the guy cables (fig. 3). As a consequence, the interpretation of these measurements is quite difficult. It is expected that further measurements, made after the completion of the bridge, will be simpler to interpret.Figure 8 shows a detail of the measurements made in November, while figure.9 shows temperature measurements at the top and bottom of the section at mid-span made during that same period. It is clear that the measured deflections correspond to changes in the temperature. The temperature at the bottom of the section follows closely variations of the air temperature(measured in the shade near the north web of the girder). On the other hand, the temperature at the top of the cross section is less subject to rapid variations. This may be due to the high elevation of the bridge above ground, and also to the fact that, during the measuring period, there was little direct sunshine on the deck. The temperature gradient between top and bottom of the cross section has a direct relationship with short-term variations. It does not, however, appear to be related to the general tendency to decrease in rotations observed in fig. 8.8. FUTURE DEVELOPMENTSFuture developments will include algorithms to reconstruct deflections from measured rotations. To enhance the accuracy of the reconstruction of deflections, a 3D finite element model of the entire structure is in preparation [15]. This model will be used to identify the influence on rotations of various phenomena, such as creep of the piers and girder, differential settlements, horizontal and vertical temperature gradients or traffic loads.Much work will be devoted to the interpretation of the data gathered in the Mentue bridge. The final part of the research project work will focus on two aspects: understanding the very complex behavior of the structure, and determining the most important parameters, to allow a simple and effective monitoring of the bridges deflections.Finally, the research report will propose guidelines for determination of deflections from measured rotations and practical recommendations for the implementation of measurement systems using inclinometers. It is expected that within the coming year new sites will be equipped with inclinometers. Experiences made by using inclinometers to measure deflections during loading tests [16, 17] have shown that the method is very flexible and competitive with other high-tech methods.As an extension to the current research project, an innovative system for the measurement of bridge joint movement is being developed. This system integrates easily with the existing monitoring system, because it also uses inclinometers, although from a slightly different type.9. CONCLUSIONSAn innovative measurement system for deformations of structures using high precision inclinometers has been developed. This system combines a high accuracy with a relatively simple implementation. Preliminary results are very encouraging and indicate that the use of inclinometers to monitor bridge deformations is a feasible and offers advantages. The system is reliable, does not obstruct construction work or traffic and is very easily installed. Simultaneous temperature measurements have confirmed the importance of temperature variations on the behavior of structural concrete bridges.10. REFERENCES[1] ANDREY D., Maintenance des ouvrages d’art: méthodologie de surveillance, PhD Dissertation Nr 679, EPFL, Lausanne, Switzerland, 1987.[2] BURDET O., Load Testing and Monitoring of Swiss Bridges, CEB Information Bulletin Nr 219, Safety and Performance Concepts, Lausanne, Switzerland, 1993.[3] BURDET O., Critères pour le choix de la quantitéde précontrainte découlant de l.observation de ponts existants, CUST-COS 96, Clermont-Ferrand, France, 1996.[4] HASSAN M., BURDET O., FAVRE R., Combination of Ultrasonic Measurements and Load Tests in Bridge Evaluation, 5th International Conference on Structural Faults and Repair, Edinburgh, Scotland, UK, 1993.[5] FAVRE R., CHARIF H., MARKEY I., Observation à long terme de la déformation des ponts, Mandat de Recherche de l’OFR 86/88, Final Report, EPFL, Lausanne, Switzerland, 1990.[6] FAVRE R., MARKEY I., Long-term Monitoring of Bridge Deformation, NATO Research Workshop, Bridge Evaluation, Repair and Rehabilitation, NATO ASI series E: vol. 187, pp. 85-100, Baltimore, USA, 1990.[7] FAVRE R., BURDET O. et al., Enseignements tirés d’essais de charge et d’observations à long terme pour l’évaluation des ponts et le choix de la précontrainte, OFR Report, 83/90, Zürich, Switzerland, 1995.[8] DAVERIO R., Mesures des déformations des ponts par un système d’inclinométrie,Rapport de maîtrise EPFL-IBAP, Lausanne, Switzerland, 1995.[9] WYLER AG., Technical specifications for Zerotronic Inclinometers, Winterthur, Switzerland, 1996.[10] FAVRE R., MARKEY I., Generalization of the Load Balancing Method, 12th FIP Congress, Prestressed Concrete in Switzerland, pp. 32-37, Washington, USA, 1994.[11] FAVRE R., BURDET O., CHARIF H., Critères pour le choix d’une précontrainte: application au cas d’un renforcement, "Colloque International Gestion des Ouvrages d’Art: Quelle Stratégie pour Maintenir et Adapter le Patrimoine, pp. 197-208, Paris, France, 1994. [12] FAVRE R., BURDET O., Wahl einer geeigneten Vorspannung, Beton- und Stahlbetonbau, Beton- und Stahlbetonbau, 92/3, 67, Germany, 1997.[13] FAVRE R., BURDET O., Choix d’une quantité appropriée de précontrain te, SIA D0 129, Zürich, Switzerland, 1996.[14] NATIONAL INSTRUMENTS, LabView User.s Manual, Austin, USA, 1996.[15] BOUBERGUIG A., ROSSIER S., FAVRE R. et al, Calcul non linéaire du béton arméet précontraint, Revue Français du Génie Civil, vol. 1 n° 3, Hermes, Paris, France, 1997. [16] FEST E., Système de mesure par inclinométrie: développement d’un algorithme de calcul des flèches, Mémoire de maîtrise de DEA, Lausanne / Paris, Switzerland / France, 1997.[17] PERREGAUX N. et al., Vertical Displacement of Bridges using the SOFO System: a Fiber Optic Monitoring Method for Structures, 12th ASCE Engineering Mechanics Conference, San Diego, USA, to be published,1998.译文平衡悬臂施工混凝土桥挠度和温度的自动监测作者Olivier BURDET博士瑞士联邦理工学院,洛桑,瑞士钢筋和预应力混凝土研究所概要:我们想要跟踪结构行为随时间的演化,需要一种可靠的监测系统。
毕业设计论文 电子秤 中英文 外文资料 文献 翻译
外文参考资料二:Abstract: In order to solve the weight problem often encountered in measuring the low-mass objects in the trade and daily life of the modern business, the design of a new pocket-sized electronic scales. This pocket-sized electronic scales Force Sensor gravity signals into electrical signals to measure, and measuring the results of the digital display. The pocket-sized electronic scales with a small size, light weight, easy to carry, intuitive display, measurement and high precision; complex structure, the cost disadvantages. This article focuses on the load cell works, error compensation, the main parameters of selection. And the technical and economic analysis.Keywords: pocket-sized electronic scales; weighing; sensor; error compensationCLC number: TH715. 1] sign code: A Article ID: 100 522 895 (2007) 022*******1 A needs analysisIn modern commerce and trade and everyday life, often encounter the problem of measuring the weight of the low-mass objects. Although the traditional steelyard can solve this problem, but inconvenient to carry, the efficiency is not high, the display is not intuitive and low measurement accuracy; mechanical spring balance can solve this problem, but the inertia inherent low frequency, high sensitivity, measurement accuracy is not high. With the progress and update of the micro-computer technology, integrated circuit technology, sensor technology, electronic scales rapiddevelopment, it has a responsive, high accuracy, fully functional, the display is intuitive, compact, easy to use and so on.For these reasons, in order to solve the low-mass objects weighing problem, if a small size, light weight, portable, digital display electronic scales, will be popular. Discussed below, that is, the scope of a weighing 5 kg compact electronic scales.2 DesignThe principle of the structure of the pocket-sized electronic scales shown in Figure 1. The main task is to design compact electronic scales weighing the choice of the force sensors. Dynamometer sensor types to achieve the weighing and digital display, the key is to want to force (gravity) signals into electrical signals to measure method is mainly divided into two categories: one is the direct method, namely the use of pressure magnetic sensor, piezoelectric sensor, Piezoresistive sensors directly to the force signal converted into electrical signals; the other is the indirect method, the elastic element as the sensor will pull, pressure changes in strain, displacement, or frequency, and then strain sensors, displacement sensors, or frequency sensor strain, displacement or frequency changes for power. Comprehensive comparison of a variety of sensors, use the indirect method of strain gauge force transducer.Pocket-sized electronic scale structural principle:Sensor → amplifier → CPU→ display → AöD converter3 sensor device design3.1 worksThe working principle of the strain gauge force transducer strain gauge pasted into force, force-sensitive elasticelement, the corresponding strain when the elastic element force deformation, the strain gauge into a resistance change, which led to the voltage measuring circuit changes by measuring the output voltage value, and then through the conversion can be obtained by the measurement of body weight. Since the pocket-sized electronic scales require small size, weighing in scope, precision and angle even consistency, sensor and display integration, it is selected parallel to the two holes cantilever beam strain gauge load-bearing sensor. Its characteristics are: high precision, ease of processing, simple and compact structure, strong resistance to partial load, high natural frequency.Strain gauge choice of a metal palisade metal mooring paste on the insulating substrate parked strain gages, mechanical strain resistance strain gauge feelings generally 10 - 10 - 2mm, the resistance rate of change of the attendant about 10 - 6 10 - 2 orders of magnitude, such a small change in resistance measured using the general resistance of the instrument is hard to measure out, you must use some form of measurement.Circuit into small changes in resistance rates to changes in voltage or current, in order to secondary instrument display. Bridge measurement circuit to meet this requirement. In the load cell, R 1, R 2, R 3, R 44 strain gauge resistor bridge measurement circuit shown in Figure 3. R m is the temperature compensation resistor, e is the excitation voltage, V is the output voltage.外文参考资料三:The load cell is a quality signal into a measurable electrical signal outputdevice. Must consider the actual working environment of the sensor which sensor Yin, this is essential for the correct selection of the load cell, and it is related to the sensor can work as well as its safety and service life, and the whole weighing the reliability and safety sex. On the basic concepts and methods of evaluation of the major technical indicators of the load cell, the new and old GB qualitative differences.The traditional concept, the load sensor weighing sensors, force sensors, collectively referred to using a single parameter to evaluate its measurement properties. Old GB will be completely different application objects and the use of environmental conditions "weighing" and "measured force" two sensors into one to consider, not given to distinguish between the test and evaluation methods. Old GB total of 21 indicators, were tested at room temperature; and non-linearity, hysteresis error, repeatability error, creep, the additional error of the zero temperature and the maximum error in the six indicators of the rated output additional temperature error, to determine said The level of accuracy of the weight sensor, respectively 0.02,0.03,0.05 said.Proportion to convert the output signal can be measured. Taking into account the different place of use of the acceleration due to gravity and air buoyancy on the conversion, the main performance indicators of the load cell linearity error, hysteresis error, repeatability error, creep, zero-temperature characteristics and temperature sensitivity characteristics. In a variety of weighing and measuring the quality of the system, usually the integrated error accuracy of the integrated control sensors, and integrated error band or scale error band (Figure 1) linked so that selection corresponds to a certain accuracy weighing weighing sensors. International Organization of Legal Metrology(OIML) requirements, sensor error with total weighing instrument error δ with Δ of 70% of the load cell linearity error, hysteresis error within the specified temperature range due to the effect of temperature on the sensitivity of the error the sum can not exceed the error band of δ. This allows the manufacturer of the components that make up the total measurement error adjustment to obtain the desired accuracy.The load cell conversion method is divided into photoelectric, hydraulic, electromagnetic force type, capacitive, magnetic poles change the form of vibratory gyroscope ceremony, resistance strain type, to the most extensive use of resistance strain.Electromagnetic force sensorIt uses a load-bearing stage load and the principle of electromagnetic force Equilibrium (Figure 5). Put the loading stage, the measured object at one end of the lever upward tilt; photoelectric detect the tilt signal, amplified into the coil, the electromagnetic force, so that the lever to return to equilibrium. Currents produce electromagnetic counterweight digital converter, you can determine the quality of the measured object. The electromagnetic force sensor accuracy, up to 1/2000 ~ 1/60000, but the weighing range is only tens of mg to 10 kg.Capacitive sensorsItcapacitor oscillator circuit of the oscillation frequency f and the plate spacing d is directly proportional relationship between the work (Figure 6). There are two plates, one fixed and the other one can move. Bearing load measured object, the leaf spring deflection, the distance between the twoplates changes, the oscillation frequency of the circuit also changes. The measured frequency change can be calculated to the quality of the load-bearing stage, the measured object. Capacitive sensor power consumption, low cost, accuracy of 1/200 to 1/500.Pole change the form of sensorFerromagneticcomponents in the measured object gravity under mechanical deformation, internal stress and cause changes in permeability, and also changes so that the induced voltage of the secondary coil wound on both sides of the ferromagnetic component (pole). Measure the voltage variation can be calculated added to the force on the pole, and then determine the quality of the measured object. Pole to change the form of sensor accuracy is not high, usually 1/100, applicable to the large tonnage weighing, weighing ranging from tens to tens of thousands of kilograms.Vibration sensorThe force of the elastic element, the natural vibration frequency of the force is proportional to the square root of. Measure the natural frequency changes, you can find the measured object role in the elastic component of the force, and then calculate the quality. The vibration sensor vibrating wire and tuning fork.The elastic component of the vibrating wire sensor string wire. When the load-bearing stage, plus the measured object, the intersection of the V-shaped string wire is pulled down, and left strings of tension increases, the right string tension decreases. The natural frequency of the two strings of different changes. Calculate the frequency difference between the two strings, you can find the quality of the measured object. The higher the accuracy of the vibrating wire sensor, up to 1/1000 ~ 1/10000, weighing 100 g to hundreds of kilograms, but the structure is complex anddifficult process, and high cost.The elastic component of the tuning fork sensor is a tuning fork. Fixed tuning fork end of the piezoelectric element, the natural frequency of oscillation of a tuning fork, it can be measured oscillation frequency. When the load-bearing stage and the measured object, the tuning fork direction of tensile force while the increase in natural frequency, increasing levels of applied force is proportional to the square root. Measure the changes of natural frequency can be calculated heavy loads imposed on the tuning fork on the force, and then calculate the quality of heavy objects. The tuning fork sensor power consumption, measurement accuracy up to 1/10000 to 1/200 000, weighing range of 500g ~ 10kg.外文参考文献中文翻译参考资料二:摘要: 为解决现代商业贸易和日常生活中经常遇到的测量小质量物体的重量问题, 介绍了一种新型的袖珍式电子秤的设计。
计算机外文翻译(完整)
计算机外⽂翻译(完整)毕业设计(论⽂)外⽂资料翻译专业:计算机科学与技术姓名:王成明学号:06120186外⽂出处:The History of the Internet附件: 1.外⽂原⽂ 2.外⽂资料翻译译⽂;附件1:外⽂原⽂The History of the InternetThe Beginning - ARPAnetThe Internet started as a project by the US government. The object of the project was to create a means of communications between long distance points, in the event of a nation wide emergency or, more specifically, nuclear war. The project was called ARPAnet, and it is what the Internet started as. Funded specifically for military communication, the engineers responsible for ARPANet had no idea of the possibilities of an "Internet."By definition, an 'Internet' is four or more computers connected by a network.ARPAnet achieved its network by using a protocol called TCP/IP. The basics around this protocol was that if information sent over a network failed to get through on one route, it would find another route to work with, as well as establishing a means for one computer to "talk" to another computer, regardless of whether it was a PC or a Macintosh.By the 80's ARPAnet, just years away from becoming the more well known Internet, had 200 computers. The Defense Department, satisfied with ARPAnets results, decided to fully adopt it into service, and connected many military computers and resources into the network. ARPAnet then had 562 computers on its network. By the year 1984, it had over 1000 computers on its network.In 1986 ARPAnet (supposedly) shut down, but only the organization shut down, and the existing networks still existed between the more than 1000 computers. It shut down due to a failied link up with NSF, who wanted to connect its 5 countywide super computers into ARPAnet.With the funding of NSF, new high speed lines were successfully installed at line speeds of 56k (a normal modem nowadays) through telephone lines in 1988. By that time, there were 28,174 computers on the (by then decided) Internet. In 1989 there were 80,000 computers on it. By 1989, there were290,000.Another network was built to support the incredible number of people joining. It was constructed in 1992.Today - The InternetToday, the Internet has become one of the most important technological advancements in the history of humanity. Everyone wants to get 'on line' to experience the wealth of information of the Internet. Millions of people now use the Internet, and it's predicted that by the year 2003 every single person on the planet will have Internet access. The Internet has truly become a way of life in our time and era, and is evolving so quickly its hard to determine where it will go next, as computer and network technology improve every day.HOW IT WORKS:It's a standard thing. People using the Internet. Shopping, playing games,conversing in virtual Internet environments.The Internet is not a 'thing' itself. The Internet cannot just "crash." It functions the same way as the telephone system, only there is no Internet company that runs the Internet.The Internet is a collection of millioins of computers that are all connected to each other, or have the means to connect to each other. The Internet is just like an office network, only it has millions of computers connected to it.The main thing about how the Internet works is communication. How does a computer in Houston know how to access data on a computer in Tokyo to view a webpage?Internet communication, communication among computers connected to the Internet, is based on a language. This language is called TCP/IP. TCP/IP establishes a language for a computer to access and transmit data over the Internet system.But TCP/IP assumes that there is a physical connecetion between onecomputer and another. This is not usually the case. There would have to be a network wire that went to every computer connected to the Internet, but that would make the Internet impossible to access.The physical connection that is requireed is established by way of modems,phonelines, and other modem cable connections (like cable modems or DSL). Modems on computers read and transmit data over established lines,which could be phonelines or data lines. The actual hard core connections are established among computers called routers.A router is a computer that serves as a traffic controller for information.To explain this better, let's look at how a standard computer might viewa webpage.1. The user's computer dials into an Internet Service Provider (ISP). The ISP might in turn be connected to another ISP, or a straight connection into the Internet backbone.2. The user launches a web browser like Netscape or Internet Explorer and types in an internet location to go to.3. Here's where the tricky part comes in. First, the computer sends data about it's data request to a router. A router is a very high speed powerful computer running special software. The collection of routers in the world make what is called a "backbone," on which all the data on the Internet is transferred. The backbone presently operates at a speed of several gigabytes per-second. Such a speed compared to a normal modem is like comparing the heat of the sun to the heat of an ice-cube.Routers handle data that is going back and forth. A router puts small chunks of data into packages called packets, which function similarly to envelopes. So, when the request for the webpage goes through, it uses TCP/IP protocols to tell the router what to do with the data, where it's going, and overall where the user wants to go.4. The router sends these packets to other routers, eventually leadingto the target computer. It's like whisper down the lane (only the information remains intact).5. When the information reaches the target web server, the webserver then begins to send the web page back. A webserver is the computer where the webpage is stored that is running a program that handles requests for the webpage and sends the webpage to whoever wants to see it.6. The webpage is put in packets, sent through routers, and arrive at the users computer where the user can view the webpage once it is assembled.The packets which contain the data also contain special information that lets routers and other computers know how to reassemble the data in the right order.With millions of web pages, and millions of users, using the Internet is not always easy for a beginning user, especially for someone who is not entirely comfortale with using computers. Below you can find tips tricks and help on how to use main services of the Internet.Before you access webpages, you must have a web browser to actually be able to view the webpages. Most Internet Access Providers provide you with a web browser in the software they usually give to customers; you. The fact that you are viewing this page means that you have a web browser. The top two use browsers are Netscape Communicator and Microsoft Internet Explorer. Netscape can be found at /doc/bedc387343323968011c9268.html and MSIE can be found at /doc/bedc387343323968011c9268.html /ie.The fact that you're reading this right now means that you have a web browser.Next you must be familiar with actually using webpages. A webpage is a collection of hyperlinks, images, text, forms, menus, and multimedia. To "navigate" a webpage, simply click the links it provides or follow it's own instructions (like if it has a form you need to use, it will probably instruct you how to use it). Basically, everything about a webpage is made to be self-explanetory. That is the nature of a webpage, to be easily navigatable."Oh no! a 404 error! 'Cannot find web page?'" is a common remark made by new web-users.Sometimes websites have errors. But an error on a website is not the user's fault, of course.A 404 error means that the page you tried to go to does not exist. This could be because the site is still being constructed and the page hasn't been created yet, or because the site author made a typo in the page. There's nothing much to do about a 404 error except for e-mailing the site administrator (of the page you wanted to go to) an telling him/her about the error.A Javascript error is the result of a programming error in the Javascript code of a website. Not all websites utilize Javascript, but many do. Javascript is different from Java, and most browsers now support Javascript. If you are using an old version of a web browser (Netscape 3.0 for example), you might get Javascript errors because sites utilize Javascript versions that your browser does not support. So, you can try getting a newer version of your web browser.E-mail stands for Electronic Mail, and that's what it is. E-mail enables people to send letters, and even files and pictures to each other.To use e-mail, you must have an e-mail client, which is just like a personal post office, since it retrieves and stores e-mail. Secondly, you must have an e-mail account. Most Internet Service Providers provide free e-mail account(s) for free. Some services offer free e-mail, like Hotmail, and Geocities.After configuring your e-mail client with your POP3 and SMTP server address (your e-mail provider will give you that information), you are ready to receive mail.An attachment is a file sent in a letter. If someone sends you an attachment and you don't know who it is, don't run the file, ever. It could be a virus or some other kind of nasty programs. You can't get a virus justby reading e-mail, you'll have to physically execute some form of program for a virus to strike.A signature is a feature of many e-mail programs. A signature is added to the end of every e-mail you send out. You can put a text graphic, your business information, anything you want.Imagine that a computer on the Internet is an island in the sea. The sea is filled with millions of islands. This is the Internet. Imagine an island communicates with other island by sending ships to other islands and receiving ships. The island has ports to accept and send out ships.A computer on the Internet has access nodes called ports. A port is just a symbolic object that allows the computer to operate on a network (or the Internet). This method is similar to the island/ocean symbolism above.Telnet refers to accessing ports on a server directly with a text connection. Almost every kind of Internet function, like accessing web pages,"chatting," and e-mailing is done over a Telnet connection.Telnetting requires a Telnet client. A telnet program comes with the Windows system, so Windows users can access telnet by typing in "telnet" (without the "'s) in the run dialog. Linux has it built into the command line; telnet. A popular telnet program for Macintosh is NCSA telnet.Any server software (web page daemon, chat daemon) can be accessed via telnet, although they are not usually meant to be accessed in such a manner. For instance, it is possible to connect directly to a mail server and check your mail by interfacing with the e-mail server software, but it's easier to use an e-mail client (of course).There are millions of WebPages that come from all over the world, yet how will you know what the address of a page you want is?Search engines save the day. A search engine is a very large website that allows you to search it's own database of websites. For instance, if you wanted to find a website on dogs, you'd search for "dog" or "dogs" or "dog information." Here are a few search-engines.1. Altavista (/doc/bedc387343323968011c9268.html ) - Web spider & Indexed2. Yahoo (/doc/bedc387343323968011c9268.html ) - Web spider & Indexed Collection3. Excite (/doc/bedc387343323968011c9268.html ) - Web spider & Indexed4. Lycos (/doc/bedc387343323968011c9268.html ) - Web spider & Indexed5. Metasearch (/doc/bedc387343323968011c9268.html ) - Multiple searchA web spider is a program used by search engines that goes from page to page, following any link it can possibly find. This means that a search engine can literally map out as much of the Internet as it's own time and speed allows for.An indexed collection uses hand-added links. For instance, on Yahoo's site. You can click on Computers & the Internet. Then you can click on Hardware. Then you can click on Modems, etc., and along the way through sections, there are sites available which relate to what section you're in.Metasearch searches many search engines at the same time, finding the top choices from about 10 search engines, making searching a lot more effective.Once you are able to use search engines, you can effectively find the pages you want.With the arrival of networking and multi user systems, security has always been on the mind of system developers and system operators. Since the dawn of AT&T and its phone network, hackers have been known by many, hackers who find ways all the time of breaking into systems. It used to not be that big of a problem, since networking was limited to big corporate companies or government computers who could afford the necessary computer security.The biggest problem now-a-days is personal information. Why should you be careful while making purchases via a website? Let's look at how the internet works, quickly.The user is transferring credit card information to a webpage. Looks safe, right? Not necessarily. As the user submits the information, it is being streamed through a series of computers that make up the Internet backbone.The information is in little chunks, in packages called packets. Here's the problem: While the information is being transferred through this big backbone, what is preventing a "hacker" from intercepting this data stream at one of the backbone points?Big-brother is not watching you if you access a web site, but users should be aware of potential threats while transmitting private information. There are methods of enforcing security, like password protection, an most importantly, encryption.Encryption means scrambling data into a code that can only be unscrambled on the "other end." Browser's like Netscape Communicator and Internet Explorer feature encryption support for making on-line transfers. Some encryptions work better than others. The most advanced encryption system is called DES (Data Encryption Standard), and it was adopted by the US Defense Department because it was deemed so difficult to 'crack' that they considered it a security risk if it would fall into another countries hands.A DES uses a single key of information to unlock an entire document. The problem is, there are 75 trillion possible keys to use, so it is a highly difficult system to break. One document was cracked and decoded, but it was a combined effort of14,000 computers networked over the Internet that took a while to do it, so most hackers don't have that many resources available.附件2:外⽂资料翻译译⽂Internet的历史起源——ARPAnetInternet是被美国政府作为⼀项⼯程进⾏开发的。
汽车类(外文翻译)--汽车营销automotive marketing(译文+英文)—-毕业论文设计
Automotive MarketingFirst, the auto parts network management conceptAmerican auto parts of automobile fittings dealer Raymond is located in a suburban Atlanta, American and other accessories, this shop to shop and its characteristics, but is online transactions, and car accessories sales related services are available on the Internet. This distributior store of salespeople have extensive network of knowledge, they patiently helped no online trading experience of customer finish on the Internet. If the customer need, they also can be free of imparting knowledge of online transactions. In order to reflect the rapid and convenient online sales, they provide 24-hour services, if the customer questions, they always strive to reply in 15 minutes. The customer need, sitting at home before entering the store sells computer, then the website can complete all want to do, watch shop fittings, download the pictures, auto prices, orders, etc. Then, you can sit at home or in his own maintenance shop of door-to-door salesman received by car accessories.Online transaction does have many advantages. To save time, this is obvious. In this way, said dealers trade become a way to attract customers, people gradually accept it and approved. At the same time, the online trading reduced many expenses, including the staff, management, marketing, etc, and save the cost of expenses on auto parts price on the customer benefit.This is the foreign auto accessories sales of a networked management. This through the Internet and e-commerce fulfillment of our country, and online business, the auto parts marketing MVP has important significance. From the current situation of auto parts, auto sales network throughout the circulation of construction is not perfect, or in an internal network condition. The network Settings are mostly for enterprise internal coordination and daily management, instead of e-commerce.China's online accessories sales prospects from abroad, also can be the development of auto parts online sales of enlightenment. In the foreign auto accessories sales, how to do? "" zero kilometers sales How to provide the most satisfactory service to customers? With the Internet, these two problems can greatly alleviate. Now, especially developed countries around the world through the Internet to buy auto accessories are expanding quickly.Second, the auto parts network management advantagesOnline purchase of auto parts for car dealers and customers, whether for auto parts manufacturing enterprise, it is a good thing. First, for auto parts manufacturing enterprise, the Internet can more easily collect customers to buy auto parts in the process of the various issues, and timely information feedback to the auto parts manufacturing enterprises. According to the above analysis, the enterprise can produce customer purchase intention, thus producing according with market demand as the auto parts. This saves time and cost, and snatch market opportunities. Secondly, the use of Internet information and convenient services, manufacturing enterprises can promptly informed accessories vendors inventory and sales, thereby adjusting their production and auto parts allocation plan. Auto accessories vendors reduce inventory, accelerate the cash flow, obtained satisfactory returns. For users, they can through the Internet, like "menu" optional choose oneself need auto parts.The market information for auto parts manufacturing enterprise and the seller is important, and can be easily obtained through the Internet. Internet auto parts vendors canprovide customers to production enterprise of real-time field information. The demand of information can help to reduce automobile accessories sales production enterprise charges, which usually cost will account for auto parts price of around 15% final sales. If the promotion costs, the cost is higher proportion. In fact, the Internet can also play a role of advertising.Before that, the sellers of auto parts distribution has always sold in part, and another part of the poor. Money is part of the occupied fee is caused to sell the car accessories. Through the Internet, the production enterprises and vendors can be avoided in production and sales market sales bad auto parts. With the advent of the Internet and convenient service, not only saves time and cost, and more importantly, the Internet can cause a concept of change, auto parts manufacturing enterprise, distributors and customers to be stuck nearlier more.Third, China's automobile fittings network management development trendChina's auto accessories network management and e-commerce, has started to present development trend. Many of the current domestic large and medium-sized car repair enterprises established computer management system, realized the internal network. This covers the entire network maintenance services. To receive from business, dispatching material inspection. Computerized control can be made to understand the undertakings in real-time monitoring, which can form, and greatly improve the efficiency of the staff, more important is to replace manual accounting and management, strengthen accessories.Meanwhile, some large scale, the current operating performance good car accessories dealers also introduced a computerized management. Because of automotive products, so use variety of such management software, the personnel must be higher requirements after a period of training to mount guard. Such auto parts management network covers the whole process of operation. From the incoming, retail and wholesale price is determined according to the models, and such Numbers classified management, finally to do account settlement and delivery, and XiaoZhang. Chain-like management make better dealer has put the network management of the whole FenXiaoDian to it, formed a certain scale of network connection. Many automobile fittings all dealers from network management gained good returns. The most prominent feature is reflected in the commodity, through the network management allocations, can reach twice the result with half the effort.In addition, in recent years the old car accessories circulation system gradually broken, auto parts market, constantly mature vigorous development. Some far-sighted insight, the operator has felt the network era, and start a near the market network. Like changchun automobile fittings, west of Beijing automobile fittings, Shanghai auto parts market such as the city of virtual network construction and the development of the market for 2000. But the reality is that the network is quite childish, but certainly not realize online trading and service.With the quickening pace of "two", the personage inside course of study to commend "trinity" sales mode in the earth gradually. For example, in the choice of Shanghai general dealers, whether to have "trinity" sales ability to determine the object, such as a "trinity" whole car accessories sales mode is a microcosm of network flow field. Because it includes from truckload sale, spare parts supply and maintenance.Mention auto parts network management and e-commerce, somebody thinks, car accessories telephone shopping is actually e-commerce, because only communicationplatform between different, the operation is basically the same. Actually this kind of understanding is not accurate, phone business and e-commerce is more like Cousins, in many ways, phone business congenital deficiency. First, consumers from the phone in understanding the information is limited, can fully satisfy customer's requirements. Secondly, if advertisers, or printing accessories for customers, due to the directory of accessories sales, cost of printing more and more high, but slow renewal speed. In addition, on the telephone exchanges, due to the environment, voice, speaking, the influence of factors, make telephone service personnel difficulty and error rates increased. Just as phone business, management content in depth and breadth aspect further development will be limited.Fourth,Auto parts distribution system and network management of constructionAuto parts distribution system and network management of construction iis now a successful online trading tangible products such as books, audio and video products, clothing, etc., and auto parts as a certain scientific and technological content, some products are statemandatory standard industrial products, to achieve on-line transactions, compared with other industrial products, have their advantages, sellers and buyers as long as posted on the Internet and input information about auto parts, such as vehicles, cars, parts name, part number, manufacture, price, quantity, etc., you can sell online or purchase.To truly realize the concept of e-commerce online sales, buyers and sellers in addition to solving the "integrity" issues, but also must establish a complete set of efficient logistics distribution system.Speaking before the factors that limit development of electronic commerce, nothing more than a means of payment, security authentication, the real make up, will find car parts logistics and distribution system is the most difficult, the most facile, the most expensive one.Many auto parts e-commerce companies are trying to find the existing physical network, such as postal services, courier and even newspaper delivery company as a delivery system.However, a suitable auto parts distribution and e-commerce system should look like?The conditions of physical network can be transformed into an auto parts distribution system of e-commerce will be the lowest cost?Five, Auto parts network management is the only way for the development and reform of the road networkThe Chinese auto parts sales development should be appropriate for the situation in China, with Chinese characteristics, the way the Internet business. Indeed, the United States, network operators have achieved great success, but we can not ignore this brilliant behind the social basis of the United States strong material foundation. As early as 100 years ago, the U.S. has established a comprehensive road, rail, postal services, courier delivery system combining; today's society, Americans have been accustomed to "free currency trading." It can be said that today's Internet economy development in the United States should be a very natural result and is more than 200 years the United States as a free market economy based on natural product. Like a child to climb from the start with their bare hands, and then learn to walk, over time learned to run naturally. As the development of China, only two aspects of payment and delivery has become a fatal problem "bottleneck." How to combine the development of China's national conditions and characteristics of the Internet, be able to realistically do something practical auto parts network operators today is the development of priority. China'sauto parts e-commerce and enterprise network operators must follow the joint and it should be a very natural result is more than 200 years the United States as a free market economy based on natural product. Like a child to climb from the start with their bare hands, and then learn to walk, over time learned to run naturally. As the development of China, only two aspects of payment and distribution has become a fatal problem "bottleneck."How to combine the development of China's national conditions and characteristics of the Internet, Being able to realistically do something practical auto parts network operators today is the development of priority.汽车营销一、汽车配件网络化经营的概念美国汽车配件经销商雷蒙德的汽车配件店位于美国亚特兰大市的一个郊外,这个小店与别的配件店并无二致,但其特色是网上交易,任何与汽车配件销售相关的服务均可在互联网上实现。
服装设计类毕业设计毕业论文外文翻译-服装设计工程之边缘设计英文翻译外文
原文Couture Sewing TechniqueClaire B.ShaefferEdge Finishes Hems,Facings and BindingsU nless finished in some way, the edges of a garment ravel and look incomplete. These edges—the neckline; the vertical front edges of jackets, coats and many blouses; jackets and coats—can be finished in conspicuously or they can become distinctive, decorative elements of the design.Three finishes are used extensively in couture:hems, facings and bindings.The choice of edge finish depends on many things—the shape of the edge being finished; its position on the garment; the type, design and fabric of the garment; current fashion trends; and the preferences of the individual wearer and the designer. For example, if the bottom edge of a dress is straight, it might be completed with a hem, a facing or a binding. But if this edges is asymmetrical, curved, scalloped or otherwise unusually shaped, it will need to be finished with a facing. Even when the edge is visually the same on the neckline and hem, the two different edges are likely to require slightly different finishes to accommodate the curve at the neckline and the weight of the fabric at the hem. And although it’s obvious that a tailored garment would require very different finishingfrom an evening gown, even similar designs vorked in dissimilar fabrics would dictate finishes suitable for each fabric.Although hems, facings and bindings are all edge finishes, each has a slightly different function. Hems are generally used on the lower edges of a garment or garment section (for example, a sleeve) and many help the garment hang attractively by adding weight to the edge. Facings, on the other hand, are applied to the upper and vertical edges of a garments. Bindings can be used on upper, lower or vertical edges, but they’re used most often to replace facings rather than hems.Facings can be cut as separate sections and sewn to the garment to finish curved or shaped edges. Or, when used on edges that are straight or only slightly curved, they can be nothing more than a wide hem allowance, in which case they’re called extended facings. Both hems and facings are visible on only one side—usually the underside—of the garment. Bindings, by contrast, are separate strips of fabric that encase the garment edge and finish both sides of the garment attractively.Because in couture the cost of labor and materials takes a back seat to the desired results, edges are not always finished with the simplest method or the one most often used in ready-to-wear construction or home sewing.Whatever the finishing method, hems, facings and bindings can be sewn entirely by hand or machine work.. The hand work visible on the finished product, however, is only a fraction of the hand work used to finish the edges of the traditional couture garment.FACINGSFacings, like hems, are designed to finish the edge of the garment. Unlike hems, which hang free of the body and affect the garment’s hang more than its overall shape, faced edges frequently fit the body’s curves and subtly affect the garment’s silhouette. Used on garment openings, curved edges and shaped edges like jacket lapels, facings contribute significantly to an overall impression of a well-constructed garment.There are three types of facings: extended, shaped and bias. Two of these —shaped and bias facings—are cut separately from the garment and can be sewn from self-fabric or lightweight lining fabrics. The extended facing is cut as an extension of the garment section like a plain hem and is, of course, self-fabric.The extended facing is nothing more than a 1/2-in. to 2-in. hem and is sewn exactly like a plain hem (see pp. 63-64). When the garment edge is on the length-wise grain, the extended facing duplicates the shape andgrain of the edge it faces. But when the edge is slanted on a bias or has a slight curve, the facing can’t duplicate the grain and may have to be eased, stretched or clipped to fit the edge smoothly.The extended facing is used extensively in couture because the folded edge of this facing is flatter and more supple than the seamed edges of shaped and bias facings and consequently drapes better. Edges with extended facings are generally interfaced and stabilized so that they maintain their original shape for the life of the garment.As its name suggests, the shaped facing is cut to duplicate the shape of the edge it faces and ususlly duplicates the grain as well. This facing is often used on necklines and on edges intended to have a crisp, constructed look, and it’s always used on intricately shaped edges like a scalloped hem.The bias facing is a strip cut on the true bias. Because it doesn’t duplicatethe grain of the edge it faces, this facing must itself be shaped to fit the edge. Bias facings are made from lightweight fabrics and produce narrow, inconspicuous facings.In cousture, more than one type of facing is often used on a single garment or even on a single edge. The pink gazar dress shown above, for example, has extended facings on the front neckline and back opening with shaped facings on the front neckline and back opening with shaped facings on the back neckline. Similarly, the jacker on p.60 has a shaped facing on the upper half of the front edge and an extended facing on the lower half of this edge.Before applying any kind of facing, examine the garment’s fit to determine whether the edge needs to be help in or stabilized with a stay tape (see pp. 49-50) or interfaced (see p. 68). Once you’ve handled the edge as required, then you can proceed to apply the facing you’ve chosen.SHAPED FACINGSShaped facings can be applied by hand or by machine. Both types of applications are used in couture, while only machine applications are used in resdy-to-wear. The machine application is, of course, faster, but it’s sometimes more difficult to shape the facing so that it fits smoothly,and the seamline is sometimes visible at the garment edge. The instructions below are for applying the facing by hand. (For directions on applying shaped facings by machine, refer to your favorite sewing manual.)These directions focus on neckline facings because they’re most frequently used in couture workrooms. However, the directions can be applied to other edges such as waistbands, armholes, applied pockets, collars and cuffs, and they can be adapted for garment linings. The facing can be made any time after the neck edge is established, the seamline or foldline is thread-traced, and the edge is interfaced or stabilized appropriately for the design.Facings can be cut from the original garment pattern if the edge wasn’t changed during the fitting process, or the garment itself can serve as a pattern. When the garment is used as a pattern, the thread-traced neckline can be used to establish a corresponding stitching line on the facing. Afinished neckline can also be used as a guide when you’re applying the facing by hand.Neck facings can be cut in several shapes. Two of the most popular are the traditional circlular shape, which measures an even distance all around from the edge, and a rectangular shape, which extends into the armscye seams. When the larger shape is used, the facing edges can be anchored in the seamlines, holding them smooth and in place. The facing shadow may also be less obtrusive with the larger shape, depending on the design. The obvious disadvantage of this facing is the additional fabric introduced into the shoulder area, which may give the garment a bulky appearance.One solution for reducing some of this bulk is to relocate the seamlines 1/2 in. to 1 in. from their original positions. In couture, the seams on facings are not always aligned with the corresponding garment seamlines, as they are in ready-to-wear and home sewing.The directions that follow are for cutting and applying the less familiar rectangular facing. They can easily be adapted for a circular facing, Start by selecting some scraps from your garment fabric for the front and back facings unless the fabric is bulky or heavy, in which case use a lighter,firmly woven material for the facings. Rectangular pieces of cloth are preferable because they make it easier to identify the grainlines. If you’re cutting a rectangular facing for a garment with a high, round neckline with a closre in the back, begin with one large rectangle about 16 in. wide by 7 in. long for the front facing and two smaller ones about 8 in. wide by 6 in. long for the back facings.When applying the facing by hand, it’s easier to finish the garment edge before making the facing so that you can use the finished, do so before starting the facing and clip the free edge of the interfacing as needed, to make it lie flat. Trim the seam allowance around the garment neck to 3/4 in. andfold it to the wrong side. Baste a generous 1/5 in. from the edge. To minimize the seam allowance’s tendency to curl around the neck, snip shallow cuts into the raw edge every inch or so as needed to make the neckline seam allowance lie flat(as shown on p.74).With the wrong side up, place the neckline over a pressing cushion andpress just the neckline edge. With your fingers, gently try to flatten the raw edge. If necessary, trim the edge further to 3/8 in. for firmly woven fabrics and 1/2 in. for less stabble fabrics. If the seam allowance still doesn’t lie flat, clip the raw edge with short, closely spaced snips up to, but not through the basting stitches around the neck edge. Use a loose catchstitch to sew the edge of the seam allowance to the underlining or interfacing. If the garment has neither, sew carefully so the stitches do not show on the right side of the garment.Cut a rectangle for each section to be faced. Before proceeding, decide whether relacating the shoulder seams will redistribute the bulk. After relacating the seam, if you decide to do so, begin with wrong sides together, and match and pin the grainlines together at the center front of the garment and its facing. Then, holding the garment neckline curved, as it will be when worn, smooth the facing in place, pinning as you go. When you get to the shoulder seams, smooth the front facing over the seams so that the seam allowances are flat. Pin and then trim away the excess at the shoulder seams and at the neck edgd, leaving 1/2-in. seam allowances on the facing, as shown above.Pin the back facing(s) in place. At the shoulder seams,trim and then turn the raw edges under, then pin and slip-baste, as shown above. At thispoint, you can machine-stitch the shoulder seams. At the neckline, trim away the excess, leaving a 1/2-in. seam allowance.Turn under the raw edge so the facing is 1/16 in. to 1/4 in. below the edge of the neckline and does not expose the clips on the garment’s seam allowance. If necessary, clip the edge of the facing at intervals as needed to make it turn under smoothly and pin it in place. On edges with shallow curves, you can turn back the neck edge of the facing in place and press lightly. Using a fell stitch or slipstitch, sew the facing to the neck edge and join the shoulder seams if they weren’t machine-stitched. Remove the bastings and press lightly.BIAS FACINGSA bias facing is a narrow strip of fabric cut on the true bias that’s shaped, rather than cut, to duplicate the edge it faces. Well adapted to garments with soft edges, this facing is frequently used on blouses and dresses and on lightweight silk and cotton fabrics. In couture work-rooms, most bias facings are applied by hand. Generally, self-fabric is used if the garment is sewn from light-weight fabric, but if the fabric is heavy, lining material can be used instead.Bias facings are narrower and less conspicuous than shaped facings, and since they require less fabric, they’re both more comfortable to wear nextto the skin and more economical to sew. There are two disadvantages to these facings, however. When a bias facing is applied, the garment edge is rarely interfaced and may not be as smooth. And since the bias facing is usually slipstitched to the garment, it’s sometimes difficult to prevent the stitches from showing on the outside of the garment.Most bias facings are finished so they’re about 1/2 in. wide, but they can be as narrow as 1/4 in. on a jewel neckline and as wide as 2 in. at the waist of a skirt. Generally, the wider the bias facing, the more difficult it is to shape it to a curved edge.Before applying a bias facing, finish the garment edge. Fold the seam allowance to the wrong side and baste 1/8 in. to 1/4 in. from the edge. Clip as needed to make the edge lie flat. With the wrong side up, press the edge.Measure the garment edge to be faced and cut a bias strip several inches longer, or join several strips for the length you need. For a 11/2-in. wide facing, the strip should be 1 in. wide for straight edges and 11/2 in.wide for curved edges. Fold one of the long edges under 1/4 in. This is best accomplished by folding 6 in. at one time and pleating the folded edge with your hands into 1-in. pleats so the edge will stay folded without pressing, which might stretch it.Begin with the wrong side up and match the wrong side of the bias strip to the wrong side of the folded garment edge, aligning the bias edge with the basting, 1/8 in. to 1/4 in. below the garment edge. Pin the bias, easing or stretching the strip until it fits the edge smoothly, and baste.Place the edge over a pressing cushion with the right side up. Cover theedge with a press cloth and carefully press just the edge and the bias strip. The facing shoule lie smoothly against the wrong side of the garment. If it doesn’t, release the basting and try again.Using a slipstitch or fell stitch, sew the facing to the seam allowance. Trim the bias so it’s an even 3/4 in. wide. To finish the free edge, fole it under 1/4 in., pin and baste. Using a very fine needle, sew the edge to the garment with a loose slipstitch or fell stitch. If the garment is backed, catch the backing but not the garment. Remove the bastings and press lightly.When applying a bias facing to a neckline without an opening, begin at the left shoulder seam and work toward the front neckline(this is the most difficult part of the neckline to face and, in couture, is therefore tackled first). For a bias facing at the armscye, begin at the underarm. Finish by folding one end of the bias wrong sides together on the lengthwise grain. Lightly crease the fold with your thumbnail. Fold the other end under so the folded edges match. Then slipstitch the folds together.BINDINGSAn elegant finish suitable for nearly every edge,a binding can be unobtrusive or, in a contrasting fabiric or texture, add dash to yourgarment. Bindings are made by stitching a strip of fabric to the right side of an edge, wrapping it around the edge and securing it neatly on the underside. Often finished so they’re attractive on both the right and wrong side of the garment, bindings are frequently used on transparent fabrics, two-faced fabrics and on reversible and unlined garments.In order to shape and sew bindings to curved edges easily, most fabric bindings are cut on the true bias at a 45°angel to the lengthwise grain. But if the garment edges are straight or almost straight, bingdings can be cut on either the crossgrain or lengthwise grain to enhance the design. The directions below focus on bias-cut bindings, but they can easily be adapted for nonbias strips and ribbon, although these other bindings donot take the shape of the edge as easily.Selecting the fabric for bindings is particularly important. Lightweight materials like crepe, sation, chiffon and voile are suitable for bindings on almost any shell fabric. If you wan a heavier bound edge, you could use fabrics like wool, rib-weaves, cottons and sturdy linens. But be aware that the heavier the binding fabric, the more difficult it is to work with and control its bulk, particularly at the ends.Most bindings are finished about 1/4 in. wide, but on very lightweight fabrics they can be as narrow as narrow as 1/8 in., and on bulky or heavy fabrics they can be as wide ae 1-in. Bindings can be made with either a single-layered, open strip of fabric or with a double-layered, folded strip. Obviously, bindings sewn from a double layer are stiffer and thicker because they contain more fabric, an advantage when that binding fabric is lightweight or when you want a sharply defined edge. But if the binding fabric is heavy or bulky or if the garment edge is designed to hang softly, a single-layered binding is more suitable.Generally, bindings are not applied until the garment is almost finishe—that is, until appropriate interfacings and backings have already been set, the garment fitted and all corrections made. On lined couture garments,however, the binding is frequently applied first by hand or machine, and finished wirh the lining, which covers the raw edge of the bingding..CUTTING AND STITCHING THE BIAS STRIPIf you lived in Italy, you would visit your favorite merceria, or sewing-nitions store, when you wanted to trim a design with bias bindings (I’ve looked in stores in France and England but hanve never seen fabric sold in this way). There you would find a large assortment of fabrics already cut with one edge on the bias. After you chose your fabric, a salesperson would cut a parallelogram for you, which would be ready to be cut into bias strips.In America, however, the home sewer’s fitst task in making a bias binding is to estaqblish the true bias of the fabric. This is important because if the strips are not cut exactly at a 45°angle, the finished bindings will ripple, twist and pucker. The best way to establish the true bias is with an isosceles right triangle—a drafting tool that has two sides of equal length with a 90°angel between them.Align one of the triangle’s short sides with the length-wise grain.The other side will be on the crossgrain, and the hypotenuse will mark the true bias. Mark parallellines on the bias with chalk and cut as many strips asneeded for the length of your edges (see the discussions on the following pages on single and double bindings to calculate the width of strip needed for a given finished binding width). For a short bound edge in a prominent place on the garment—for example, on a lapel—use one continuous bias strip. For longer edges, join as many strips as needed for your length. In general, it’s better to join the strips on the lengthwise grain, but if the fabric has a prominent cross-rib or horizontal stripe, the seam will be less noticeable if the seam is parallel to the stripe or rib.To join bias strips, first trim all ends of the bias strips so they’re on the desired grain—ususlly the lengthwise grain. Begin with two strips, right side up. Fold one end under 1/4 in., pin it to the other strip so the grainlines match and slip-baste at the fold. Repeat until all the strips are joined. Then, fold the basted strips together with right sides together and sew the seam with a very short machine stitch (20 stitchws/in. or 1.25mm). Press the seams flat and then press them open. Trim away the ends of the seam allowance that extend beyond the width of the strip and trim the seams to 1/8 in.Although bindings can be applied to almost any edge, the directions given here are for applying single and double bindings to a neckline, where they’re most often sewn. To prepare the garment for either a single ordouble 1/4-in.—or the width of the finished binding—below the neckline. Do not trim away the seam allowance.SINGLE BINDINGThe couture method of applying a single binding has several advantages over the regular home-sewing method. It’s begun with the right sides up, allowing you to see the binding as you shape it to fit the edge, It can also be made entirely by hand rather than machine, which results in a softer finish. To determine the most suitable width for the finished binding, experiment with fabric scraps before cutting the strips until you arrive at a sample you like.Thread-trace the garment edge, as explained on p.76, and cut the bias strips so that the width of each strip is six times the desired finished width of the binding plus 1/2-in.(To make a finished 1/4-in.wide binding, for example, cut a bias strip 2 in. wide.) Press the strip, stretching it slightlylengthwise. Fold under one long edge of the bias 1/4 in., regardless of the desired finished width, and baste 1/8 in.from the fold.Working with the right sides up, align and pin the folded edge to the garment so it barely laps the binding seamline. To apply the bias smoothly to a neckline, hold the folded edge of the strip taut when pinning it in place. Baste through all layers close to the folded edge and slip-baste the strip to the garment. Then remove the first row of basting that holds the binding flat, unfold the strip so the right sides are together and machine-stitch over the basted line. Trim the seam allowance at the neckline, remove any bastings and press lightly.Fold the binding toward the neckline and finger-press the binding seam. Wrap the binding around the neckline’s raw edge and finger-press again. Pin-baste the binding in place on the wrong side of the neckline, setting the pins just below the binding. Measure the binding width. If it’s more than 1/4 in., the finished neckline will probably be too tight. If this is the case, unpin the binding and trim the seam as needed to keep the finished binding width at 1/4 in. Then fold the raw edge under so that the folded edge touches the seamline. If the folded edge overlaps the seamline, unfold the bias and trim it as needed to make a folded edge the width you need. Baste and then permanently fell or slipstitch the folded edge to thestitched line. Remove the bastings and press lightly.Sone binding fabrics are too bulky to produce a binding that looks the same on both sides. If the design has a lining that can be applied over the binding, bulk can be reduced by leaving the binging’s raw edge flat on the wrong side of the garment instead of turning it under.Sew the binding in place by hand with short running stitches. Then trim it 1/4 in. below the seamline and apply the lining to cover the raw edge.When binding outward curves, for example, on collars and pockets, trim away the garment seam allowance. Ease the folded edge to the binding seamline so the bias is smooth at the raw edge. Then proceed as above.When binding corners on collars and lapels, a triangle of excess fabric will form at the corner. Use a needle to shape the triangle into a miter and baste it in place. Then proceed as above.DOUBLE BINDINGAmerican couturier Charles Kleibacker had an unusual method for applying a double binding, which he used to finish and trim the edges of his lace designs and to sew wide bias bands in the place of skirt hems. He laid the bias strip flat on the table and applied the garment to the bias strip, instead of the reverse. Working this way makes it easier to control the bias binding and produces fantastic results.Because the finished binding for this application method will consist of atleast seven layers, the weight and bulk of the binding fabric are particularly important and must be taken into account when deciding the width of the finished bias. Medium-weight fabrics such as four-ply silk and silk linen are suitable for bindings as narrow as 1/8 in., lightweight crepes, chiffon and organza can be used. The instructions here are for a finished binding 1/4 in. wide on a neckline. They can be modified to make a very narrow 1/8-in. wide binding or one that’s much wider.Begin with a bias strip four times the finished width plus two 1/2-in. wide seam allowances.(For a finished binding 1/4 in. wide, for example, the strip will be 2 in. wide) With the wrong sides together, fold the strip in half lengthwise and baste about 1/8 in. from the fold. Lay the strip flat on the table with the fold toward you. Using chalk or pins, mark a line along the length of the strip that is an even distance from the folded edge and equal to twice the finished binding width. (For a 1/4-in. wide binding, make 1/2 in. from the fold.) Put a second row of basting through both layers along this line to mark the binding seamline.On the garment, thread-trace the neckline and seamline for the binding, as explained on p.76. Spread the garment flat on the table with the edge to be bound toward you and right side up. Then, using the thread-traced binding seamline as a guide, fold the neck edge of the garment under 1/4in.To accomplish this neatly and without stretching the neckline, clip it as needed and fold under one small section at a time. Match and pin the folede edge of the neckline to the binding seamline on the bias strip (the one father from the folded edge of the bias strip), as shown above. Baste the garment to the binding, using a small fell stitch or slipbasting. Reposition the layers with right sides together. Machine-stitch over the basted seamline. Remove the basting and press lightly.Trim away the original thread-traced seam allowance on the neckline to reduce bulk. Wrap the binding around this raw edge. The binding’s folded edge should just meet the stitches line on the wrong side of the neckline, and the finished binding should measure 1/4 in. wide. If it doesn’t, trim the neckline a little more. Grade the seam allowances as needed. Pin the binding in place, setting the pins at an angle with the heads toward the neckline and baste. Hold the edge in one hand with the wrong side toward you, and using a fell stitch, sew the folded edge to the stitched line.FINISHING THE BINDING’S ENDSBindings often begin and end at garment openings such as neckline plackets and zipper closures. For a smooth, inconspicuous finish, fold the ends of the binding to the wrong side before wrapping the bingding around the edge.Complete the opening and trim away any excess bulk before beginning the binding. Pin the bias to the garment, allowing a 1-in. extension of the bias strip on each side of the opening to the wrong side. Trim to about 1/2 in. and sew it with a catchstitch to the wrong sides of the bias strip and garment. Repeat for the other end. If the opening has a hook, eye or button loop, sew it in place now so the end will be hidden between the layers of the binding.On couture and good-quality ready-to-wear garments, bindings applied to edges without openings (for example, circular necklines, armholes, sleeve edges and skirt hems) usually have the ends seamed on grain. Before beginning such bindings, decide where to locate the seam so it will be as inconspicuous as possible on the finished design. On necklines, the seam is usually deemed least conspicuous at the left shoulder; on armholes and the edges of sleeves, under the arm; snd, on hems, at the left side seam.Prepare a bias strip that’s long enough to allow for a 4-in. tail on each end of the strip. Pin the bias strip to the garment. Fold back one tail on the lengthwise grain with wrong sides of the bias together and pin it in place. Repeat for the other end so the folded edges meet.Slip-baste the folds together. Unpin the bias about 1-in. on either side of the basted seamlineso you can stitch the basted seam easily, or use a short backstitch to sew the seam by hand. Press the seam open and trim the seam allowances to 1/4 in. Repin the bias to the edge and complete the binding, which encases the raw edges of the seam.译文时装缝纫技术之服装边缘处理工艺衣服的边缘如果不以某种方式处理,这件衣服就会显得混乱和不完整。
土木工程-毕业设计-论文-外文翻译-中英文对照
英文原文:Concrete structure reinforcement designSheyanb oⅠWangchenji aⅡⅠFoundation Engineering Co., Ltd. Heilongjiang DongyuⅡHeilongjiang Province, East Building Foundation Engineering Co., Ltd. CoalAbstract:structure in the long-term natural environment and under the use environment's function, its function is weaken inevitably gradually, our structural engineering's duty not just must finish the building earlier period the project work, but must be able the science appraisal structure damage objective law and the degree, and adopts the effective method guarantee structure the security use, that the structure reinforcement will become an important work. What may foresee will be the 21st century, the human building also by the concrete structure, the steel structure, the bricking-up structure and so on primarily, the present stage I will think us in the structure reinforcement this aspect research should also take this as the main breakthrough direction.Key word:Concrete structure reinforcement bricking-up structure reinforcement steel structure reinforcement1 Concrete structure reinforcementConcrete structure's reinforcement divides into the direct reinforcement and reinforces two kinds indirectly, when the design may act according to the actual condition and the operation requirements choice being suitable method and the necessary technology.1.1the direct reinforcement's general method1)Enlarges the section reinforcement lawAdds the concretes cast-in-place level in the reinforced concrete member in bending compression zone, may increase the section effective height, the expansion cross sectional area, thus enhances the component right section anti-curved, the oblique section anti-cuts ability and the section rigidity, plays the reinforcement reinforcement the role.In the suitable muscle scope, the concretes change curved the component right section supporting capacity increase along with the area of reinforcement and the intensity enhance. In the original component right section ratio of reinforcement not too high situation, increases the main reinforcement area to be possible to propose the plateau component right section anti-curved supporting capacity effectively. Is pulled in the section the area to add the cast-in-place concrete jacket to increase the component section, through new Canada partial and original component joint work, but enhances the component supporting capacity effectively, improvement normal operational performance.Enlarges the section reinforcement law construction craft simply, compatible, and has the mature design and the construction experience; Is suitable in Liang, the board, the column, the wall and the general structure concretes reinforcement; But scene construction's wet operating time is long, to produces has certain influence with the life, and after reinforcing the building clearance has certain reduction.2) Replacement concretes reinforcement lawThis law's merit with enlarges the method of sections to be close, and after reinforcing, does not affect building's clearance, but similar existence construction wet operating time long shortcoming; Is suitable somewhat low or has concretes carrier's and so on serious defect Liang, column in the compression zone concretes intensity reinforcement.3) the caking outsourcing section reinforcement lawOutside the Baotou Steel Factory reinforcement is wraps in the section or the steel plate is reinforced component's outside, outside the Baotou Steel Factory reinforces reinforced concrete Liang to use the wet outsourcing law generally, namely uses the epoxy resinification to be in the milk and so on methods with to reinforce the section the construction commission to cake a whole, after the reinforcement component, because is pulled with the compressed steel cross sectional area large scale enhancement, therefore right section supporting capacity and section rigidity large scale enhancement.This law also said that the wet outside Baotou Steel Factory reinforcement law, the stress is reliable, the construction is simple, the scene work load is small, but is big with the steel quantity, and uses in above not suitably 600C in the non-protection's situation the high temperature place; Is suitable does not allow in the use obviously to increase the original component section size, but requests to sharpen its bearing capacity large scale the concrete structure reinforcement.4) Sticks the steel reinforcement lawOutside the reinforced concrete member in bending sticks the steel reinforcement is (right section is pulled in the component supporting capacity insufficient sector area, right section compression zone or oblique section) the superficial glue steel plate, like this may enhance is reinforced component's supporting capacity, and constructs conveniently.This law construction is fast, the scene not wet work or only has the plastering and so on few wet works, to produces is small with the life influence, and after reinforcing, is not remarkable to the original structure outward appearance and the original clearance affects, but the reinforcement effect is decided to a great extent by the gummy craft and the operational level; Is suitable in the withstanding static function, and is in the normal humidity environment to bend or the tension member reinforcement.5) Glue fibre reinforcement plastic reinforcement lawOutside pastes the textile fiber reinforcement is pastes with the cementing material the fibre reinforcement compound materials in is reinforced the component to pull the region, causes it with to reinforce the section joint work, achieves sharpens the component bearing capacity the goal. Besides has glues the steel plate similar merit, but also has anticorrosive muddy, bears moistly, does not increase the self-weight of structure nearly, durably, the maintenance cost low status merit, but needs special fire protection processing, is suitable in each kind of stress nature concrete structure component and the general construction.This law's good and bad points with enlarge the method of sections to be close; Is suitable reinforcement which is insufficient in the concrete structure component oblique section supporting capacity, or must exert the crosswise binding force to the compressional member the situation.6) Reeling lawThis law's good and bad points with enlarge the method of sections to be close; Is suitable reinforcement which is insufficient in the concrete structure component oblique section supporting capacity, or must exert the crosswise binding force to the compressional member the situation.7) Fang bolt anchor lawThis law is suitable in the concretes intensity rank is the C20~C60 concretes load-bearing member transformation, the reinforcement; It is not suitable for already the above structure which and the light quality structure makes decent seriously. 1.2The indirect reinforcement's general method1)Pre-stressed reinforcement law(1)Thepre-stressed horizontal tension bar reinforces concretes member in bending,because the pre-stressed and increases the exterior load the combined action, in the tension bar has the axial tension, this strength eccentric transmits on the component through the pole end anchor (, when tension bar and Liang board bottom surface close fitting, tension bar can look for tune together with component, this fashion has partial pressures to transmit directly for component bottom surface), has the eccentric compression function in the component, this function has overcome the bending moment which outside the part the load produces, reduced outside the load effect, thus sharpened component's anti-curved ability. At the same time, because the tension bar passes to component's pressure function, the component crack development can alleviate, the control, the oblique section anti-to cut the supporting capacity also along with it enhancement.As a result of the horizontal lifting stem's function, the original component's section stress characteristic by received bends turned the eccentric compression, therefore, after the reinforcement, component's supporting capacity was mainly decided in bends under the condition the original component's supporting capacity 。
毕业设计论文外文文献翻译智能交通信号灯控制中英文对照
英语原文Intelligent Traffic Light Controlby Marco Wiering The topic I picked for our community project was traffic lights. In a community, people need stop signs and traffic lights to slow down drivers from going too fast. If there were no traffic lights or stop signs, people’s lives would be in danger from drivers going too fast.The urban traffic trends towards the saturation, the rate of increase of the road of big city far lags behind rate of increase of the car.The urban passenger traffic has already become the main part of city traffic day by day and it has used about 80% of the area of road of center district. With the increase of population and industry activity, people's traffic is more and more frequent, which is unavoidable. What means of transportation people adopt produces pressure completely different to city traffic. According to calculating, if it is 1 to adopt the area of road that the public transport needs, bike needs 5-7, car needs 15-25, even to walk is 3 times more than to take public transits. So only by building road can't solve the city traffic problem finally yet. Every large city of the world increases the traffic policy to the first place of the question.For example,according to calculating, when the automobile owning amount of Shanghai reaches 800,000 (outside cars count separately ), if it distributes still as now for example: center district accounts for great proportion, even when several loop-lines and arterial highways have been built up , the traffic cannot be improved more than before and the situation might be even worse. So the traffic policy Shanghai must adopt , or called traffic strategy is that have priority to develop public passenger traffic of city, narrow the scope of using of the bicycle progressively , control the scale of growth of the car traffic in the center district, limit the development of the motorcycle strictly.There are more municipals project under construction in big city. the influence on the traffic is greater.Municipal infrastructure construction is originally a good thing of alleviating the traffic, but in the course of constructing, it unavoidably influence the local traffic. Some road sections are blocked, some change into an one-way lane, thus the vehicle can only take a devious route . The construction makes the road very narrow, forming the bottleneck, which seriously influence the car flow.When having stop signs and traffic lights, people have a tendency to drive slower andlook out for people walking in the middle of streets. To put a traffic light or a stop sign in a community, it takes a lot of work and planning from the community and the city to put one in. It is not cheap to do it either. The community first needs to take a petition around to everyone in the community and have them sign so they can take it to the board when the next city council meeting is. A couple residents will present it to the board, and they will decide weather or not to put it in or not. If not put in a lot of residents might be mad and bad things could happened to that part of the city.When the planning of putting traffic lights and stop signs, you should look at the subdivision plan and figure out where all the buildings and schools are for the protection of students walking and riding home from school. In our plan that we have made, we will need traffic lights next to the school, so people will look out for the students going home. We will need a stop sign next to the park incase kids run out in the street. This will help the protection of the kids having fun. Will need a traffic light separating the mall and the store. This will be the busiest part of the town with people going to the mall and the store. And finally there will need to be a stop sign at the end of the streets so people don’t drive too fast and get in a big accident. If this is down everyone will be safe driving, walking, or riding their bikes.In putting in a traffic light, it takes a lot of planning and money to complete it. A traffic light cost around $40,000 to $125,000 and sometimes more depending on the location. If a business goes in and a traffic light needs to go in, the business or businesses will have to pay some money to pay for it to make sure everyone is safe going from and to that business. Also if there is too many accidents in one particular place in a city, a traffic light will go in to safe people from getting a severe accident and ending their life and maybe someone else’s.The reason I picked this part of our community development report was that traffic is a very important part of a city. If not for traffic lights and stop signs, people’s lives would be in danger every time they walked out their doors. People will be driving extremely fast and people will be hit just trying to have fun with their friends. So having traffic lights and stop signs this will prevent all this from happening.Traffic in a city is very much affected by traffic light controllers. When waiting for a traffic light, the driver looses time and the car uses fuel. Hence, reducing waiting times before traffic lights can save our European society billions of Euros annually. To make traffic light controllers more intelligent, we exploit the emergence of novel technologies such as communication networks and sensor networks, as well as the use of more sophisticated algorithms for setting traffic lights. Intelligent traffic light control does not only mean thattraffic lights are set in order to minimize waiting times of road users, but also that road users receive information about how to drive through a city in order to minimize their waiting times. This means that we are coping with a complex multi-agent system, where communication and coordination play essential roles. Our research has led to a novel system in which traffic light controllers and the behaviour of car drivers are optimized using machine-learning methods.Our idea of setting a traffic light is as follows. Suppose there are a number of cars with their destination address standing before a crossing. All cars communicate to the traffic light their specific place in the queue and their destination address. Now the traffic light has to decide which option (ie, which lanes are to be put on green) is optimal to minimize the long-term average waiting time until all cars have arrived at their destination address. The learning traffic light controllers solve this problem by estimating how long it would take for a car to arrive at its destination address (for which the car may need to pass many different traffic lights) when currently the light would be put on green, and how long it would take if the light would be put on red. The difference between the waiting time for red and the waiting time for green is the gain for the car. Now the traffic light controllers set the lights in such a way to maximize the average gain of all cars standing before the crossing. To estimate the waiting times, we use 'reinforcement learning' which keeps track of the waiting times of individual cars and uses a smart way to compute the long term average waiting times using dynamic programming algorithms. One nice feature is that the system is very fair; it never lets one car wait for a very long time, since then its gain of setting its own light to green becomes very large, and the optimal decision of the traffic light will set his light to green. Furthermore, since we estimate waiting times before traffic lights until the destination of the road user has been reached, the road user can use this information to choose to which next traffic light to go, thereby improving its driving behaviour through a city. Note that we solve the traffic light control problem by using a distributed multi-agent system, where cooperation and coordination are done by communication, learning, and voting mechanisms. To allow for green waves during extremely busy situations, we combine our algorithm with a special bucket algorithm which propagates gains from one traffic light to the next one, inducing stronger voting on the next traffic controller option.We have implemented the 'Green Light District', a traffic simulator in Java in which infrastructures can be edited easily by using the mouse, and different levels of road usage can be simulated. A large number of fixed and learning traffic light controllers have already been tested in the simulator and the resulting average waiting times of cars have been plotted and compared. The results indicate that the learning controllers can reduce average waiting timeswith at least 10% in semi-busy traffic situations, and even much more when high congestion of the traffic occurs.We are currently studying the behaviour of the learning traffic light controllers on many different infrastructures in our simulator. We are also planning to cooperate with other institutes and companies in the Netherlands to apply our system to real world traffic situations. For this, modern technologies such as communicating networks can be brought to use on a very large scale, making the necessary communication between road users and traffic lights possible.中文翻译:智能交通信号灯控制马克·威宁我所选择的社区项目主题是交通灯。
机械设计制造及其自动化毕业论文中英文资料外文翻译
机械设计创造及其自动化毕业论文外文文献翻译INTEGRATION OF MACHINERY译文题目专业机械设计创造及其自动化外文资料翻译INTEGRATION OF MACHINERY(From ELECTRICAL AND MACHINERY INDUSTRY)ABSTRACTMachinery was the modern science and technology development inevitable result, this article has summarized the integration of machinery technology basic outline and the development background .Summarized the domestic and foreign integration of machinery technology present situation, has analyzed the integration of machinery technology trend of development.Key word: integration of machinery ,technology, present situation ,product t,echnique of manufacture ,trend of development0. Introduction modern science and technology unceasing development, impelled different discipline intersecting enormously with the seepage, has caused the project domain technological revolution and the transformation .In mechanical engineering domain, because the microelectronic technology and the computer technology rapid development and forms to the mechanical industry seepage the integration of machinery, caused the mechanical industry the technical structure, the product organization, the function and the constitution, the production method and the management systemof by machinery for the characteristic integration ofdevelopment phase.1. Integration of machinery outline integration of machinery is refers in the organization new owner function, the power function, in the information processing function and the control function introduces the electronic technology, unifies the system the mechanism and the computerization design and the software which constitutes always to call. The integration of machinery development also has become one to have until now own system new discipline, not only develops along with the science and technology, but also entrusts with the new content .But its basic characteristic may summarize is: The integration of machinery is embarks from the system viewpoint, synthesis community technologies and so on utilization mechanical technology, microelectronic technology, automatic control technology, computer technology, information technology, sensing observation and control technology, electric power electronic technology, connection technology, information conversion technology as well as software programming technology, according to the system function goal and the optimized organization goal, reasonable disposition and the layout various functions unit, in multi-purpose, high grade, redundant reliable, in the low energy consumption significance realize the specific function value, and causes the overall system optimization the systems engineering technology .From this produces functional system, then becomes an integration of machinery systematic or the integration of machinery product. Therefore, of coveringtechnology is based on the above community technology organic fusion one kind of comprehensive technology, but is not mechanical technical, the microelectronic technology as well as other new technical simple combination, pieces together .This is the integration of machinery and the machinery adds the machinery electrification which the electricity forms in the concept basic difference .The mechanical engineering technology has the merely technical to develop the machinery electrification, still was the traditional machinery, its main function still was replaces with the enlargement physical strength .But after develops the integration of machinery, micro electron installment besides may substitute for certain mechanical parts the original function, but also can entrust with many new functions,like the automatic detection, the automatic reduction information, demonstrate the record, the automatic control and the control automatic diagnosis and the protection automatically and so on .Not only namely the integration of machinery product is human's hand and body extending, human's sense organ and the brains look, has the intellectualized characteristic is the integration of machinery and the machinery electrification distinguishes in the function essence.2. Integration of machinery development condition integration of machinery development may divide into 3 stages roughly.20th century 60's before for the first stage, this stage is called the initial stage .In this time, the people determination not on own initiative uses the electronic technology the preliminary achievement to consummate the mechanical product the performance .Specially in Second World War period, the war has stimulated the mechanical product and the electronic technology union, these mechanical and electrical union military technology, postwar transfers civilly, to postwar economical restoration positive function .Developed and the development at that time generally speaking also is at the spontaneouscondition .Because at that time the electronic technology development not yet achieved certain level, mechanical technical and electronic technology union also not impossible widespread and thorough development, already developed the product was also unable to promote massively. The 20th century 70~80 ages for the second stage, may be called the vigorous development stage .This time, the computer technology, the control technology, the communication development, has laid the technology base for the integration of machinery development . Large-scale, ultra large scale integrated circuit and microcomputer swift and violent development, has provided the full material base for the integration of machinery development .This time characteristic is :①A mechatronics word first generally is accepted in Japan, probably obtains the quite widespread acknowledgment to 1980s last stages in the worldwide scale ;②The integration of machinery technology and the product obtained the enormous development ;③The various countries start to the integration of machinery technology and the product give the very big attention and the support. 1990s later periods, started the integration of machinery technology the new stagewhich makes great strides forward to the intellectualized direction, the integration of machinery enters the thorough development time .At the same time, optics, the communication and so on entered the integration of machinery, processes the technology also zhan to appear tiny in the integration of machinery the foot, appeared the light integration of machinery and the micro integration of machinery and so on the new branch; On the other hand to the integration of machinery system modeling design, the analysis and the integrated method, the integration of machinery discipline system and the trend of development has all conducted the thorough research .At the same time, because the hugeprogress which domains and so on artificial intelligence technology, neural network technology and optical fiber technology obtain, opened the development vast world for the integration of machinery technology .These research, will urge the integration of machinery further to establish the integrity the foundation and forms the integrity gradually the scientific system. Our country is only then starts from the beginning of 1980s in this aspect to study with the application .The State Councilsummary had considered fully on international the influence which and possibly brought from this about the integration of machinery technology developmenttrend .Many universities, colleges and institutes, the development facility and some large and middle scale enterprises have done the massive work to this technical development and the application, does not yield certain result, but and so on the advanced countries compared with Japan still has the suitable disparity.3. Integration of machinery trend of development integrations of machinery are the collection machinery, the electron, optics, the control, the computer, the information and so on the multi-disciplinary overlapping syntheses, its development and the progress rely on and promote the correlation technology development and the progress .Therefore, the integration of machinery main development direction is as follows:3.1 Intellectualized intellectualizations are 21st century integration of machinery technological development important development directions .Theartificial intelligence obtains day by day in the integration of machinery constructor's research takes, the robot and the numerical control engine bedis to the machine behavior description, is in the control theory foundation, the absorption artificial intelligence, the operations research, the computer science, the fuzzy mathematics, the psychology, the physiology and the chaos dynamics and so on the new thought, the new method, simulate the human intelligence, enable it to have abilities and so on judgment inference, logical thinking, independent decision-making, obtains the higher control goal in order to .Indeed, enable the integration of machinery product to have with the human identical intelligence, is not impossible, also is nonessential .But, the high performance, the high speed microprocessor enable the integration of machinery product to have preliminary intelligent or human's partial intelligences, then is completely possible and essential.In the modern manufacture process, the information has become the control manufacture industry the determining factor, moreover is the most active actuation factor .Enhances the manufacture system information-handling capacity to become the modern manufacture science development a key point .As a result of the manufacture system information organization and structure multi-level, makes the information the gain, the integration and the fusion presents draws up the character, information measure multi-dimensional, as well as information organization's multi-level .In the manufacture information structural model, manufacture information uniform restraint, dissemination processing and magnanimous data aspects and so on manufacture knowledge library management, all also wait for further break through.Each kind of artificial intelligence tool and the computation intelligence method promoted the manufacture intelligence development in the manufacture widespread application .A kind based on the biological evolution algorithm computation intelligent agent, in includes thescheduling problem in the combination optimization solution area of technology, receives the more and more universal attention, hopefully completes the combination optimization question when the manufacture the solution speed and the solution precision aspect breaks through the question scale in pairs the restriction .The manufacture intelligence also displays in: The intelligent dispatch, the intelligent design, the intelligent processing, the robot study, the intelligent control, the intelligent craft plan, the intelligent diagnosis and so on are various These question key breakthrough, may form the product innovation the basic research system. Between 2 modern mechanical engineering front science different science overlapping fusion will have the new science accumulation, the economical development and society's progress has had the new request and the expectation to the science and technology, thus will form the front science .The front science also has solved and between the solution scientific question border area .The front science has the obvious time domain, the domain and the dynamic characteristic .The project front science distinguished in the general basic science important characteristic is it has covered the key science and technology question which the project actual appeared.Manufacture system is a complex large-scale system, for satisfies the manufacture system agility, the fast response and fast reorganization ability, must profit from the information science, the life sciences and the social sciences and so on the multi-disciplinary research results, the exploration manufacture system new architecture, the manufacture pattern and the manufacture system effective operational mechanism .Makes the system optimization the organizational structure and the good movement condition is makes the system modeling , the simulation and the optimized essential target .Not only the manufacture system new architecture to makes the enterprise the agility and may reorganize ability to the demand response ability to have the vital significance, moreover to made the enterprise first floor production equipment the flexibility and may dynamic reorganization ability set a higher request .The biological manufacture view more and more many is introduced the manufacture system, satisfies the manufacture system new request.The study organizes and circulates method and technique of complicated system from the biological phenomenon, is a valid exit which will solve many hard nut to cracks that manufacturing industry face from now on currently .Imitating to living what manufacturing point is mimicry living creature organ of from the organization, from match more, from growth with from evolution etc. function structure and circulate mode of a kind of manufacturing system and manufacturing process.The manufacturing drives in the mechanism under, continuously by one's own perfect raise on organizing structure and circulating mode and thus to adapt the process of[with] ability for the environment .For from descend but the last product proceed together a design and make a craft rules the auto of the distance born, produce system of dynamic state reorganization and product and manufacturing the system tend automatically excellent provided theories foundation and carry out acondition .Imitate to living a manufacturing to belong to manufacturing science and life science of"the far good luck is miscellaneous to hand over", it will produce to the manufacturing industry for 21 centuries huge of influence .机电一体化摘要机电一体化是现代科学技术发展的必然结果,本文简述了机电一体化技术的基本概要和发展背景。
建筑设计毕业论文中英文资料外文翻译文献
毕业论文中英文资料外文翻译文献Architecture StructureWe have and the architects must deal with the spatial aspect of activity, physical, and symbolic needs in such a way that overall performance integrity is assured. Hence, he or she well wants to think of evolving a building environment as a total system of interacting and space forming subsystems. Is represents a complex challenge, and to meet it the architect will need a hierarchic design process that provides at least three levels of feedback thinking: schematic, preliminary, and final.Such a hierarchy is necessary if he or she is to avoid being confused , at conceptual stages of design thinking ,by the myriad detail issues that can distract attention from more basic consideration s .In fact , we can say that an architect’s ability to distinguish the more basic form the more detailed issues is essential to his success as a designer .The object of the schematic feed back level is to generate and evaluate overall site-plan, activity-interaction, and building-configuration options .To do so the architect must be able to focus on the interaction of the basic attributes of the site context, the spatial organization, and the symbolism as determinants of physical form. This means that ,in schematic terms ,the architect may first conceive and model a building design as an organizational abstraction of essential performance-space in teractions.Then he or she may explore the overall space-form implications of the abstraction. As an actual building configuration option begins to emerge, it will be modified to include consideration for basic site conditions.At the schematic stage, it would also be helpful if the designer could visualize his or her options for achieving overall structural integrity and consider the constructive feasibility and economic of his or her scheme .But this will require that the architect and/or a consultant be able to conceptualize total-system structural options in terms of elemental detail .Such overall thinking can be easily fed back to improve the space-form scheme.At the preliminary level, the architect’s emphasis will shift to the elaboration of his or her more promising schematic design options .Here the architect’s structural needs will shift toapproximate design of specific subsystem options. At this stage the total structural scheme is developed to a middle level of specificity by focusing on identification and design of major subsystems to the extent that their key geometric, component, and interactive properties are established .Basic subsystem interaction and design conflicts can thus be identified and resolved in the context of total-system objectives. Consultants can play a significant part in this effort; these preliminary-level decisions may also result in feedback that calls for refinement or even major change in schematic concepts.When the designer and the client are satisfied with the feasibility of a design proposal at the preliminary level, it means that the basic problems of overall design are solved and details are not likely to produce major change .The focus shifts again ,and the design process moves into the final level .At this stage the emphasis will be on the detailed development of all subsystem specifics . Here the role of specialists from various fields, including structural engineering, is much larger, since all detail of the preliminary design must be worked out. Decisions made at this level may produce feedback into Level II that will result in changes. However, if Levels I and II are handled with insight, the relationship between the overall decisions, made at the schematic and preliminary levels, and the specifics of the final level should be such that gross redesign is not in question, Rather, the entire process should be one of moving in an evolutionary fashion from creation and refinement (or modification) of the more general properties of a total-system design concept, to the fleshing out of requisite elements and details.To summarize: At Level I, the architect must first establish, in conceptual terms, the overall space-form feasibility of basic schematic options. At this stage, collaboration with specialists can be helpful, but only if in the form of overall thinking. At Level II, the architect must be able to identify the major subsystem requirements implied by the scheme and substantial their interactive feasibility by approximating key component properties .That is, the properties of major subsystems need be worked out only in sufficient depth to very the inherent compatibility of their basic form-related and behavioral interaction . This will mean a somewhat more specific form of collaboration with specialists then that in level I .At level III ,the architect and the specific form of collaboration with specialists then that providing for all of the elemental design specifics required to produce biddable construction documents .Of course this success comes from the development of the Structural Material.1.Reinforced ConcretePlain concrete is formed from a hardened mixture of cement ,water ,fine aggregate, coarse aggregate (crushed stone or gravel),air, and often other admixtures. The plastic mix is placed and consolidated in the formwork, then cured to facilitate the acceleration of the chemical hydration reaction lf the cement/water mix, resulting in hardened concrete. The finished product has high compressive strength, and low resistance to tension, such that its tensile strength is approximately one tenth lf its compressive strength. Consequently, tensile and shear reinforcement in the tensile regions of sections has to be provided to compensate for the weak tension regions in the reinforced concrete element.It is this deviation in the composition of a reinforces concrete section from the homogeneity of standard wood or steel sections that requires a modified approach to the basic principles of structural design. The two components of the heterogeneous reinforced concrete section are to be so arranged and proportioned that optimal use is made of the materials involved. This is possible because concrete can easily be given any desired shape by placing and compacting the wet mixture of the constituent ingredients are properly proportioned, the finished product becomes strong, durable, and, in combination with the reinforcing bars, adaptable for use as main members of any structural system.The techniques necessary for placing concrete depend on the type of member to be cast: that is, whether it is a column, a bean, a wall, a slab, a foundation. a mass columns, or an extension of previously placed and hardened concrete. For beams, columns, and walls, the forms should be well oiled after cleaning them, and the reinforcement should be cleared of rust and other harmful materials. In foundations, the earth should be compacted and thoroughly moistened to about 6 in. in depth to avoid absorption of the moisture present in the wet concrete. Concrete should always be placed in horizontal layers which are compacted by means of high frequency power-driven vibrators of either the immersion or external type, as the case requires, unless it is placed by pumping. It must be kept in mind, however, that over vibration can be harmful since it could cause segregation of the aggregate and bleeding of the concrete.Hydration of the cement takes place in the presence of moisture at temperatures above 50°F. It is necessary to maintain such a condition in order that the chemical hydration reaction can take place. If drying is too rapid, surface cracking takes place. This would result in reduction of concrete strength due to cracking as well as the failure to attain full chemical hydration.It is clear that a large number of parameters have to be dealt with in proportioning a reinforced concrete element, such as geometrical width, depth, area of reinforcement, steel strain, concrete strain, steel stress, and so on. Consequently, trial and adjustment is necessary in the choice ofconcrete sections, with assumptions based on conditions at site, availability of the constituent materials, particular demands of the owners, architectural and headroom requirements, the applicable codes, and environmental reinforced concrete is often a site-constructed composite, in contrast to the standard mill-fabricated beam and column sections in steel structures.A trial section has to be chosen for each critical location in a structural system. The trial section has to be analyzed to determine if its nominal resisting strength is adequate to carry the applied factored load. Since more than one trial is often necessary to arrive at the required section, the first design input step generates into a series of trial-and-adjustment analyses.The trial-and –adjustment procedures for the choice of a concrete section lead to the convergence of analysis and design. Hence every design is an analysis once a trial section is chosen. The availability of handbooks, charts, and personal computers and programs supports this approach as a more efficient, compact, and speedy instructional method compared with the traditional approach of treating the analysis of reinforced concrete separately from pure design.2. EarthworkBecause earthmoving methods and costs change more quickly than those in any other branch of civil engineering, this is a field where there are real opportunities for the enthusiast. In 1935 most of the methods now in use for carrying and excavating earth with rubber-tyred equipment did not exist. Most earth was moved by narrow rail track, now relatively rare, and the main methods of excavation, with face shovel, backacter, or dragline or grab, though they are still widely used are only a few of the many current methods. To keep his knowledge of earthmoving equipment up to date an engineer must therefore spend tine studying modern machines. Generally the only reliable up-to-date information on excavators, loaders and transport is obtainable from the makers.Earthworks or earthmoving means cutting into ground where its surface is too high ( cuts ), and dumping the earth in other places where the surface is too low ( fills). Toreduce earthwork costs, the volume of the fills should be equal to the volume of the cuts and wherever possible the cuts should be placednear to fills of equal volume so as to reduce transport and double handlingof the fill. This work of earthwork design falls on the engineer who lays out the road since it is the layout of the earthwork more than anything else which decides its cheapness. From the available maps ahd levels, the engineering must try to reach as many decisions as possible in the drawing office by drawing cross sections of the earthwork. On the site when further information becomes available he can make changes in jis sections and layout,but the drawing lffice work will not have been lost. It will have helped him to reach the best solution in the shortest time.The cheapest way of moving earth is to take it directly out of the cut and drop it as fill with the same machine. This is not always possible, but when it canbe done it is ideal, being both quick and cheap. Draglines, bulldozers and face shovels an do this. The largest radius is obtained with thedragline,and the largest tonnage of earth is moved by the bulldozer, though only over short distances.The disadvantages of the dragline are that it must dig below itself, it cannot dig with force into compacted material, it cannot dig on steep slopws, and its dumping and digging are not accurate.Face shovels are between bulldozers and draglines, having a larger radius of action than bulldozers but less than draglines. They are anle to dig into a vertical cliff face in a way which would be dangerous tor a bulldozer operator and impossible for a dragline. Each piece of equipment should be level of their tracks and for deep digs in compact material a backacter is most useful, but its dumping radius is considerably less than that of the same escavator fitted with a face shovel.Rubber-tyred bowl scrapers are indispensable for fairly level digging where the distance of transport is too much tor a dragline or face shovel. They can dig the material deeply ( but only below themselves ) to a fairly flat surface, carry it hundreds of meters if need be, then drop it and level it roughly during the dumping. For hard digging it is often found economical to keep a pusher tractor ( wheeled or tracked ) on the digging site, to push each scraper as it returns to dig. As soon as the scraper is full,the pusher tractor returns to the beginning of the dig to heop to help the nest scraper.Bowl scrapers are often extremely powerful machines;many makers build scrapers of 8 cubic meters struck capacity, which carry 10 m ³ heaped. The largest self-propelled scrapers are of 19 m ³struck capacity ( 25 m ³ heaped )and they are driven by a tractor engine of 430 horse-powers.Dumpers are probably the commonest rubber-tyred transport since they can also conveniently be used for carrying concrete or other building materials. Dumpers have the earth container over the front axle on large rubber-tyred wheels, and the container tips forwards on most types, though in articulated dumpers the direction of tip can be widely varied. The smallest dumpers have a capacity of about 0.5 m ³, and the largest standard types are of about 4.5 m ³. Special types include the self-loading dumper of up to 4 m ³ and the articulated type of about 0.5 m ³. The distinction between dumpers and dump trucks must be remembered .dumpers tip forwards and the driver sits behind the load. Dump trucks are heavy, strengthened tipping lorries, the driver travels in front lf the load and the load is dumped behind him, so they are sometimes called rear-dump trucks.3.Safety of StructuresThe principal scope of specifications is to provide general principles and computational methods in order to verify safety of structures. The “ safety factor ”, which according to modern trends is independent of the nature and combination of the materials used, can usually be defined as the ratio between the conditions. This ratio is also proportional to the inverse of the probability ( risk ) of failure of the structure.Failure has to be considered not only as overall collapse of the structure but also asunserviceability or, according to a more precise. Common definition. As the reaching of a “ limit state ” which causes the construction not to accomplish the task it was designed for. Ther e are two categories of limit state :(1)Ultimate limit sate, which corresponds to the highest value of the load-bearing capacity. Examples include local buckling or global instability of the structure; failure of some sections and subsequent transformation of the structure into a mechanism; failure by fatigue; elastic or plastic deformation or creep that cause a substantial change of the geometry of the structure; and sensitivity of the structure to alternating loads, to fire and to explosions.(2)Service limit states, which are functions of the use and durability of the structure. Examples include excessive deformations and displacements without instability; early or excessive cracks; large vibrations; and corrosion.Computational methods used to verify structures with respect to the different safety conditions can be separated into:(1)Deterministic methods, in which the main parameters are considered as nonrandom parameters.(2)Probabilistic methods, in which the main parameters are considered as random parameters.Alternatively, with respect to the different use of factors of safety, computational methods can be separated into:(1)Allowable stress method, in which the stresses computed under maximum loads are compared with the strength of the material reduced by given safety factors.(2)Limit states method, in which the structure may be proportioned on the basis of its maximum strength. This strength, as determined by rational analysis, shall not be less than that required to support a factored load equal to the sum of the factored live load and dead load ( ultimate state ).The stresses corresponding to working ( service ) conditions with unfactored live and dead loads are compared with prescribed values ( service limit state ) . From the four possible combinations of the first two and second two methods, we can obtain some useful computational methods. Generally, two combinations prevail:(1)deterministic methods, which make use of allowable stresses.(2)Probabilistic methods, which make use of limit states.The main advantage of probabilistic approaches is that, at least in theory, it is possible to scientifically take into account all random factors of safety, which are then combined to define the safety factor. probabilistic approaches depend upon :(1) Random distribution of strength of materials with respect to the conditions of fabrication and erection ( scatter of the values of mechanical properties through out the structure );(2) Uncertainty of the geometry of the cross-section sand of the structure ( faults andimperfections due to fabrication and erection of the structure );(3) Uncertainty of the predicted live loads and dead loads acting on the structure;(4)Uncertainty related to the approximation of the computational method used ( deviation of the actual stresses from computed stresses ).Furthermore, probabilistic theories mean that the allowable risk can be based on several factors, such as :(1) Importance of the construction and gravity of the damage by its failure;(2)Number of human lives which can be threatened by this failure;(3)Possibility and/or likelihood of repairing the structure;(4) Predicted life of the structure.All these factors are related to economic and social considerations such as:(1) Initial cost of the construction;(2) Amortization funds for the duration of the construction;(3) Cost of physical and material damage due to the failure of the construction;(4) Adverse impact on society;(5) Moral and psychological views.The definition of all these parameters, for a given safety factor, allows construction at the optimum cost. However, the difficulty of carrying out a complete probabilistic analysis has to be taken into account. For such an analysis the laws of the distribution of the live load and its induced stresses, of the scatter of mechanical properties of materials, and of the geometry of the cross-sections and the structure have to be known. Furthermore, it is difficult to interpret the interaction between the law of distribution of strength and that of stresses because both depend upon the nature of the material, on the cross-sections and upon the load acting on the structure. These practical difficulties can be overcome in two ways. The first is to apply different safety factors to the material and to the loads, without necessarily adopting the probabilistic criterion. The second is an approximate probabilistic method which introduces some simplifying assumptions ( semi-probabilistic methods ) .文献翻译建筑师必须从一种全局的角度出发去处理建筑设计中应该考虑到的实用活动,物质及象征性的需求。
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1. IntroductionAmerica is one of the countries that speak English. Because of the special North American culture, developing history and the social environment, American English has formed its certain unique forms and the meaning. Then it turned into American English that has the special features of the United States.American English which sometimes also called United English or U.S English is the form of the English language that used widely in the United States .As the rapid development of American economy, and its steady position and strong power in the world, American English has become more and more widely used. As in 2005, more than two-thirds of English native speakers use various forms of American English.The philologists of the United States had divided the English of the United States into four major types: “America n creating”; “Old words given the new meaning”; “Words that eliminated by English”;“The phonetic foreign phrases and the languages that are not from the English immigrates”[1].Compared to the other languages, American English is much simple on word spelling, usage and grammar, and it is one of the reasons that American English is so popular in the world.The thesis analyzes the differences between American English and British English. With the main part, it deals with the development of American English, its peculiarities compared to that of British English, its causes and tendency.2. Analyses the DifferencesAs we English learners, when we learning English in our junior or senior school, we already came across some words that have different spellings, different pronunciations or different expressions, which can be represented by following contrasted words: spellings in "color" vs. "colour"; pronunciations in "sec-re-ta-ry" vs. "sec-re-try";expressions in "first floor" equals to "the ground floor". With the above words, the former represents American English, and the latter represents British English. They are not errors but just the differences between the two languages.To be consistent in the use of English, and more importantly, to be understood easily, there is a need for the nonnative speaker to know that which words have distinct meanings and pronunciations depending on whether they are used by a Briton or an American. This is necessary not only for the sake of communication, but also for avoiding embarrassment.Many differences exist between American English and British English we have already knew. However, there are still many differences that we are not familiar with. In this part, the author will analyze the differences in several categories like spelling, pronunciation, grammar, usage and so on.2.1 SpellingThere are many differences between British English and American English in terms of spelling. After analysis by some linguists, it is said that the American English has a different tendency in pronounce, according to economical and phonetic standards. American spelling tends to reflect pronunciation, and British spelling tends to reflect grammatical or historical implications as well. Letters that not needed are being kicked out, and words are spelled as how they sound. The following examples can explain this.With "our" in words of British English like colour, humour, flavour, etc. are changed to "or" in the equivalent words of American English, like color, humor, flavor, etc. With the pronounce letter "u" being kicked out. Words ending with "-re" in British English are changed to "- er" in American English. According to its pronunciation, like "centre" and "metre" in British English, but "center" and "meter" in American English.More examples are as follows: (with the former is American English and the latter is British English)[2]center centre; check (money) cheque; color colour; curb kerb; gray grey; honor honour; inquire enquire; jail gaol; jewelry jewellery; labor labour; organization organization.2.2 Pronunciation differencesThere are of course great regional differences in pronunciation within both countries. For instance, basket,the word “a”in after、class and basket pronounce [æ] in American English,but [ɑ:] in British English.(The following examples mentioned all come from Oxford Advanced Learner’s English –Chinese Dictionary)(1) There is [hw] that correspond with [w] in American English. such as which,white,when,why. In British English :[wit∫],[wait],[wen],[wai],but in American English : [hwit∫],[hwait],[hwen],[hwai].(2)There is [r] behind the vowel in American English ,such as: far,poor. In British English: [fa:],[pu],but in American English: [far],[pur],[hir].(3)In British English [l] pronounces surd before the vowel, (clearl),and pronounces mix(混音) behind the vowel (darkl);However,in American English, no word pronounces [l]. For instance,like, filling, till,well.(4) When the phonetic symbol [t] appears between the two vowels and behind the accentuation or between the voiced consonant and the vowel, it will pronounce [d]. Such as city: [`sidi].2.3Vocabulary differencesThe average use of the total English vocabulary, the number of words which are used only in one or the other country is very small, but the problem for learners of English is that these words are among the mostcommon in the language. There are many words that are used almost exclusively by Americans, which are understood by most Britons, and vice versa. But there are others that can cause difficulty. For example, most Britons know that Americans call biscuits cookies and flats apartments, but not so many know what an alumnus or a fender is. Similarly, Americans know that what they call their yard is called a garden in Britain and that trucks are Lorries, but common British English words like pistols or off-license may mean nothing to them.2.3.1Same meaning, different wordsThe majority of the significance in glossary between American English and British English is identical, but there still exists some difference. For example, the same thing can be expressed by different words in both languages. The following examples are typical. American English: British English:bathroom,toilet, W.C./or loo; closet, cupboard;corn ,maize; drugstore, chemist's;gas/ gasoline , petrol; line , queue; oven , cooker; round-trip ticket , return ticket; suspenders , braces; truck , lorry;underpass , subway; undershirt , vest;vacation, holiday; etc. [4]2.3.2. Same words, different meaningThe identical word expresses the different meaning between British English and American English.For example:Word American English British Englishrubber condom Tool used to erasepencil markingsdate appointment daycupboarddresser A wardrobeassistant2.4 GrammarBritish English and American English grammar are the same in most sense; there are however some interesting variations. For example,there are differences in certain verb forms. In American English, thepast tense of fit is fit; in British English, it is fitted. Americanssay I've gotten to know her well; while British: I've got to know her well.Other differences involved the use of the present perfect in British English and simple past in American English include already, just andyet.British English:I've just had lunchI've already seen that filmHave you finished your homework yet?American English:I just had lunch OR I've just had lunchI've already seen that film OR I already saw that film.Have your finished your homework yet? OR Did you finish your homework yet?As another example, Americans are much more likely to be technically correct in the agreement of collective noun and verb form than Britons.So in standard American English it would be: The team is playing wellthis season whereas in British English, it is common and acceptableto say the team are playing well. Similar differences can be seen inthe use of words like government, committee etc.: The government is... (American English). The government are… (British English).2.5 UsageThere are countless other small and interesting differences between American English and British English, which come under the heading of usage. Take the useful expression used in American English through, means up to and including. e.g. The exhibition is showing March through June. The equivalent expression in British English is from March to June, but this is ambiguous. Does the exhibition close at the end of May or the end of June? To avoid any misunderstanding, it is necessary to say something like: The exhibition is showing from March to the end of June.As another example: for Americans, the number billion has 9 zeros (a thousand million); for most Britons it has 12 zeros (a million million). Zero itself is a more common word in American English than in British English, where naught is more widespread. Americans say the number 453 as four hundred fifty three, whereas in Britain it would be said four hundred and fifty three. Time expressing also is different, and may cause confusion like 4/12/1981(month first) in the USA and 12/4/1981 (day first) in the UK.2.6 The causes of the differencesAt first there were no distinctions between British English and American English known to us in the development of contemporary English. But later in the 20th century, America emerged to be a great power and began to participate the practice of the world affairs. During the World War II, America demonstrated a great strength in the leadership of the world in world various forums. And after the world war, America emerged to be one of the only two superpowers in the world. Thus and thus, the distinctive ways Americans spoken, wrote was being analyzed, studied or learned by the people of other countries, including even British. What are the causes that led to American English distinctive from British English? Or we may say exactly were there any changes in thenew environment that led to the formation of American English in the near or around 400 years after British colonist’s settlement i n the American land (which took place at the beginning of the 17th century)?2.6.1 Old words, new meaningThose who came to the new American environment had to use their own words to name or express the new things that are similar to the original thing.For example, the word "corn”. In British English, it meant and still means the main cereal food "wheat". But in America then, the main cereal food was not wheat but maize, so they call this maize "corn". At that time, they add a word "Indian" before the "corn", so called "Indian corn" to point to maize. But later, for convenient, people in America just call it "corn" instead of using its full name "Indian corn”. So now we say "pop-corn" rather than "pop-Indian-corn". Americans speak "corn" to refer to wheat, while British still speak "corn" to refer to wheat. Of course, many other examples can also support this point.2.6.2 Native Language to Express Something New.These can be found in some names of places, of animals etc… Name of place: like Ohio (which originally means Ohio River), Mississippi (originally refers to Mississippi River which means Father of waters),Kentucky (means and of tomorrow)[5]Name of animals: like moose, raccoon, skunk etc.Name of plants: hickory, sequoia, squash etc.2.6.3 Brought in the Words of Other Languages.America is known as a country of different peoples, one word"melting-pot" can express this [6]. Even at the beginning of the 17th century when America became a colony of Britain, the people who settled in that land were not purely English or British. In fact, the total population of people from other countries of Europe or other part of world is far more than that of British. But all accept English that could understand as their language. But anyhow, inevitably, these populations other than British brought some words of their own languages in coexisted with the English.Later, as America developed, more and more people from other countries like China began to immigrate to America to find some new life. One sentence can express that urge " all people are eagle to see the Status of Liberty". In this, some words of their own languages were also brought into American English. Following more examples: From American Indian: moose(驼鹿),chipmunk(金花鼠),raccoon(獾熊),sachem(酋长).From German: beer soup(啤酒汤),semester(学期),hex(符咒).From French: cent(分),voyager(航海家),chute(瀑布).From Spanish: marijuana(大麻), buckaroo(牛仔), conch(海螺),poncho(披风).This is also one of the main reasons that caused the formation of American English. Another example,Chop-suey,[7](a kind of American-Chinese food made by several sources like pork, rice, onion and so on) , word originally from the Guang Dong Hua language in China is taken by the Webster Dictionary. Expressions like "long time no see"(好久不见) imitate the way of Chinese saying and is taken by NIC's Dictionary of American English Phrases Essential American Idioms.[8]3. The Peculiarities of American English.The above section has described the causes of differences between British English and American English. Now this section will tell about the peculiarities of American English.As compared to the British English, there are several obviousfeatures of American English. First, part of the American English is of still of old or have past. Second, American English develops rapidly. Third, American English are consistent, a singly, not various kinds of American English. The formation of American English is deeply connected to its social prevailing custom and the nation disposition.3.1 Part of the American English is still of Old or having Past.Both in pronunciation and in word-spelling, For example, in American English the words like "fast, path and half" are not the same as the British pronounce [a:] , which actually the same as that of the British in the 17th century or 18th century. But now , British has already changed its pronunciation in these words to [fa:st],[pa:I],[ha:f]Another example like the words "sick" and "ill". [9] Originally these two words have the same meaning, no special different, but later in British English, "ill" means some soft discomfort, while "sick" means some tough disease, same with the feeling of sickness and disgusting. But in American English, now "ill " is rarely in use, and "sick " can be used to mean all kinds of discomforts or diseases both the little discomforts and the tough disease, which is the same as its original meaning.Another example: I guess as I think, I suppose, I believe e.g.: I guess you are wrong.(我想你错了) It was used wildly in Britain in 17th, and now they seldom use this. But Americans had kept it down.In this sense, American English is more close to the old English in some ways.3.2 Quick DevelopmentAt the same time, American English developed very quickly, became so distinctive that can be divided from what we called "the standard English" (which refers to the British English).[10] So now we come to the second feature of the American English that is its quick development.Now, in words amount, words of American English is bigger than that of British English. In structure, it's more complicated than that of British English. And thus, American English is more prepared to absorb more words, to change its spellings and pronunciations and it did do so. So now American English is different from the British English in many ways: like spelling, reading, meaning, tone grammar etc. For example, in spoken tone, American spoken English has much less ups and downs, unlike that of the British English. So American spoken- English is much simpler in tone, and easier to be understood, while the British English tone has many ups and downs, nice in hearing but harder in understanding.3.3 Consistence and creatingThe third feature of American English is its consistence and creating. For one thing, it has much more local accents or dialects than any other languages. And its local dialect does not have much effect on its national consistence. In the whole American country, people speak the same American English with the same standard. Among all the bigger countries in the world, no one has the similar language consistence as in America. For another, Americans have created new words and gave the new concepts by changing its form. For example: Pizzazz(时髦派头的人),bellhop(俱乐部男侍),debunk(揭露真相),cahoots(共谋),taikonaut (太空人).4. The History and Recent Development of American EnglishHundreds years ago, Americans spoke the same kind of language that the British spoke. When they put words on paper, they use the same vocabulary and spelling. It is true that American English and British English grew from the same roots, but gradually the language came to be somewhat different.4.1 Origin of the divisionHistorical Linguists say that spoken English was almost the same in the American colonies and Britain two-hundred years ago. Americans began to change the sound of their speech after the Revolutionary War in 1776[11]. They wanted to make it different to separate themselves from the British in language, and then American English was no longer a colonial variety of the English of London but had entered its national period. Political independence was soon followed by cultural independence, of which a notable Founding Father was Noah Webster [12]. As a schoolmaster, Webster recognized that the new nation needed a sense of linguistic identity. Accordingly he set out to provide dictionaries and textbooks for recording and teaching American English with American models. The need Webster sought to fill was twofold: to help Americans realize they should no longer look to England for a standard of usage and to foster a reasonable degree of uniformity in American English. To those ends, Webster's dictionary, reader, grammar, and blue-backed speller were major forces for institutionalizing what he called Federal English.4.2 Noah Webster.Webster recognized that the new nation needed a sense of linguistic identity. Accordingly, he set out to provide dictionaries and textbooks for recording and teaching American English with American models. The need Webster sought to fill was twofold: to help Americans realize they should no longer look to England for a standard of usage and to foster a reasonable degree of uniformity in American English. To those ends, Webster's dictionary published in 1828.Webster's dictionary established rules for speaking and spelling the words used in American English. [13]Webster wrote that all words should be said in the order of the letters that spell them. For example, “c-e-n-t-e-r,” instead of theBritish “c-e-n-t-r-e.”Noah Webster said every part of a word should be spoken. That is why Americans say “sec-re-ta-ry” instead of “sec-re’try,” and many other examples.4.3 The ImmigrationThe different languages of many people who came to the United States also helped make American and British English different. Many of their foreign words and expressions became part of English as Americans speak it. The first wave of English-speaking immigrants was settled in the North America in the 17th century, and then more and more settlers realized that they had to talk in new ways to communicate with their new neighbors. Moreover, the settlers had come from various districts and social groups of England, so there was a homogenizing effect: those in a given colony came to talk more like one another and less like any particular community in England. All these influences combined to make American English a distinct variety of the language.4.4 DevelopmentAmerican English has developed in the change of the history and produced a great influence to the British English.4.4.1 Up-to-Now Development and Its TendencyIn 20th Century, especially after the two world wars, because of American surprisingly rapid development, and while at the same time, an Imperialist Britain has its great influence in the 20th century become a history, American English as a different part of English then formed. Based on America's powerful politics, economy, culture, etc, American style of culture and living began to overwhelm the rest of the world, (Britain, with no exception) through its films, media and other things. An influential linguist Sir Ernest Gowers has confessthat in his famous English dictionary A Dictionary of Modern English Usage, using the words "symptoms of surrender by the older competitor to the younger and more vigorous".[14]In the past fifty years, the United States has overtaken England as the primary disseminator of the English language.American Culture has influenced so many countries over the world. Food Corporations like McDonalds, KFC and Red Rooster are now found everywhere also American television programs like OC, Desperate housewives and Lost. American English is playing a big part in the world, and is affecting other languages in the world. This is also the same with American Music and films, which are constantly being promoted everywhere.The influence of America has taken the American English to the whole world. As Otto Friedrich et al said: “It was the British Empire, on which the sun never set, that originally spread English around the globe, along with tea breaks, cuffed trousers and the stiff upper lip. But when the imperial sun finally set after World War II, the American language followed American power into the vacuum.”[15]4.4.2 The Interfusion of both American and British EnglishSome linguists worried that the division between American English and British English would widen as time goes. But that's not true, as the increasingly developing of international media and communication; the gap between the two divisions of English has already tended to be minimized. Like the "fall", "OK" (All Right) in American English now used commonly in Britain. And the "lift" "sweets" in British English now also used by Americans often [16].So as time goes to a more modern future, the division between the two although still exists, but would be understood almost wholly by two different language users. And the two languages are affecting each other.5. ConclusionsThere are many differences between American English and British English, which explain why there exist American English and British English. And indeed, American English has its own distinctive features, which have already been described in detail in this thesis. All this differences and distinctive features of American English make it a special different branch of English.In author’s opinion,American English is full of human, plentiful ness ideas and unique. Since 20 century, with the affection of the movies, broadcasting and comic strips of the America, the speed of the broadcasting of the new words and phrases in England is as fast as in America. The British youth generation can speak American English very fluency. One magazine [17]in England even announced a series of articles exclusively, introducing the explanation of the meaning of the American slang, and the meaning of new phrase to educate the youth.So there is no doubt that American English had made the great contribution to the English development. In other words, they are affecting and developing each other.As English learners, when learning American English, and came across some words that have different spellings, different pronunciations or different expressions, we should be aware of using them. It is author’s sincere hope that this paper will serve for people to get more information about America English.Bibliography[1] Peter Trudgill & Jean Hannah. International English [M].北京:外语教学与研究出版社,2000:13-27[2] 陆国强. 现代英语词汇[M]. 上海:上海外语教育出版社,2000:44-70[3] 李嘉玉陈永培. 英语语调[M]. 商务印书馆,1989:86-96[4] 候维瑞. 英国英语与美国英语[M]. 上海:上海外语教育出版社,1992:120-135[5] 桂灿昆. 美国英语应用语音学[M]. 上海:上海外语教育出版社,1985:88-95[6] Lakoff.R. Language and Context [M]. 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