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外文文献原稿和译文原稿Sodium Polyacrylate:Also known as super-absorbent or “SAP”(super absorbent polymer), Kimberly Clark used to call it SAM (super absorbent material). It is typically used in fine granular form (like table salt). It helps improve capacity for better retention in a disposable diaper, allowing the product to be thinner with improved performance and less usage of pine fluff pulp. The molecular structure of the polyacrylate has sodium carboxylate groups hanging off the main chain. When it comes in contact with water, the sodium detaches itself, leaving only carboxylions. Being negatively charged, these ions repel one another so that the polymer also has cross-links, which effectively leads to a three-dimensional structure. It has hige molecular weight of more than a million; thus, instead of getting dissolved, it solidifies into a gel. The Hydrogen in the water (H-O-H) is trapped by the acrylate due to the atomic bonds associated with the polarity forces between the atoms. Electrolytes in the liquid, such as salt minerals (urine contains 0.9% of minerals), reduce polarity, thereby affecting superabsorbent properties, especially with regard to the superabsorbent capacity for liquid retention. This is the main reason why diapers containing SAP should never be tested with plain water. Linear molecular configurations have less total capacity than non-linear molecules but, on the other hand, retention of liquid in a linear molecule is higher than in a non-linear molecule, due to improved polarity. For a list of SAP suppliers, please use this link: SAP, the superabsorbent can be designed to absorb higher amounts of liquids (with less retention) or very high retentions (but lower capacity). In addition, a surface cross linker can be added to the superabsorbent particle to help it move liquids while it is saturated. This helps avoid formation of "gel blocks", the phenomenon that describes the impossibility of moving liquids once a SAP particle gets saturated.History of Super Absorbent Polymer ChemistryUn til the 1980’s, water absorbing materials were cellulosic or fiber-based products. Choices were tissue paper, cotton, sponge, and fluff pulp. The water retention capacity of these types of materials is only 20 times their weight – at most.In the early 1960s, the United States Department of Agriculture (USDA) was conducting work on materials to improve water conservation in soils. They developed a resin based on the grafting of acrylonitrile polymer onto the backbone of starch molecules (i.e. starch-grafting). The hydrolyzed product of the hydrolysis of this starch-acrylonitrile co-polymer gave water absorption greater than 400 times its weight. Also, the gel did not release liquid water the way that fiber-based absorbents do.The polymer came to be known as “Super Slurper”.The USDA gave the technical know how several USA companies for further development of the basic technology. A wide range of grating combinations were attempted including work with acrylic acid, acrylamide and polyvinyl alcohol (PVA).Since Japanese companies were excluded by the USDA, they started independent research using starch, carboxy methyl cellulose (CMC), acrylic acid, polyvinyl alcohol (PVA) and isobutylene maleic anhydride (IMA).Early global participants in the development of super absorbent chemistry included Dow Chemical, Hercules, General Mills Chemical, DuPont, National Starch & Chemical, Enka (Akzo), Sanyo Chemical, Sumitomo Chemical, Kao, Nihon Starch and Japan Exlan.In the early 1970s, super absorbent polymer was used commercially for the first time –not for soil amendment applications as originally intended –but for disposable hygienic products. The first product markets were feminine sanitary napkins and adult incontinence products.In 1978, Park Davis (d.b.a. Professional Medical Products) used super absorbent polymers in sanitary napkins.Super absorbent polymer was first used in Europe in a baby diaper in 1982 when Schickendanz and Beghin-Say added the material to the absorbent core. Shortly thereafter, UniCharm introduced super absorbent baby diapers in Japan while Proctor & Gamble and Kimberly-Clark in the USA began to use the material.The development of super absorbent technology and performance has been largely led by demands in the disposable hygiene segment. Strides in absorption performance have allowed the development of the ultra-thin baby diaper which uses a fraction of the materials – particularly fluff pulp – which earlier disposable diapers consumed.Over the years, technology has progressed so that there is little if any starch-grafted super absorbent polymer used in disposable hygienic products. These super absorbents typically are cross-linked acrylic homo-polymers (usually Sodium neutralized).Super absorbents used in soil amendments applications tend to be cross-linked acrylic-acrylamide co-polymers (usually Potassium neutralized).Besides granular super absorbent polymers, ARCO Chemical developed a super absorbent fiber technology in the early 1990s. This technology was eventually sold to Camelot Absorbents. There are super absorbent fibers commercially available today. While significantly more expensive than the granular polymers, the super absorbent fibers offer technical advantages in certain niche markets including cable wrap, medical devices and food packaging.Sodium polyacrylate, also known as waterlock, is a polymer with the chemical formula [-CH2-CH(COONa)-]n widely used in consumer products. It has the ability to absorb as much as 200 to 300 times its mass in water. Acrylate polymers generally are considered to possess an anionic charge. While sodium neutralized polyacrylates are the most common form used in industry, there are also other salts available including potassium, lithium and ammonium.ApplicationsAcrylates and acrylic chemistry have a wide variety of industrial uses that include: ∙Sequestering agents in detergents. (By binding hard water elements such as calcium and magnesium, the surfactants in detergents work more efficiently.) ∙Thickening agents∙Coatings∙Fake snowSuper absorbent polymers. These cross-linked acrylic polymers are referred to as "Super Absorbents" and "Water Crystals", and are used in baby diapers. Copolymerversions are used in agriculture and other specialty absorbent applications. The origins of super absorbent polymer chemistry trace back to the early 1960s when the U.S. Department of Agriculture developed the first super absorbent polymer materials. This chemical is featured in the Maximum Absorbency Garment used by NASA.译文聚丙烯酸钠聚丙烯酸钠，又可以称为超级吸收剂或者又叫高吸水性树脂，凯博利克拉克教授曾经称它为SAM即：超级吸收性物质。

毕业论文英文参考文献与译文

Inventory managementInventory ControlOn the so-called "inventory control", many people will interpret it as a "storage management", which is actually a big distortion.The traditional narrow view, mainly for warehouse inventory control of materials for inventory, data processing, storage, distribution, etc., through the implementation of anti-corrosion, temperature and humidity control means, to make the custody of the physical inventory to maintain optimum purposes. This is just a form of inventory control, or can be defined as the physical inventory control. How, then, from a broad perspective to understand inventory control? Inventory control should be related to the company's financial and operational objectives, in particular operating cash flow by optimizing the entire demand and supply chain management processes (DSCM), a reasonable set of ERP control strategy, and supported by appropriate information processing tools, tools to achieved in ensuring the timely delivery of the premise, as far as possible to reduce inventory levels, reducing inventory and obsolescence, the risk of devaluation. In this sense, the physical inventory control to achieve financial goals is just a means to control the entire inventory or just a necessary part; from the perspective of organizational functions, physical inventory control, warehouse management is mainly the responsibility of The broad inventory control is the demand and supply chain management, and the whole company's responsibility.Why until now many people's understanding of inventory control, limited physical inventory control? The following two reasons can not be ignored:First, our enterprises do not attach importance to inventory control. Especially those who benefit relatively good business, as long as there is money on the few people to consider the problem of inventory turnover. Inventory control is simply interpreted as warehouse management, unless the time to spend money, it may have been to see the inventory problem, and see the results are often very simple procurement to buy more, or did not do warehouse departments .Second, ERP misleading. Invoicing software is simple audacity to call it ERP, companies on their so-called ERP can reduce the number of inventory, inventory control, seems to rely on their small software can get. Even as SAP, BAAN ERP world, the field ofthese big boys, but also their simple modules inside the warehouse management functionality is defined as "inventory management" or "inventory control." This makes the already not quite understand what our inventory control, but not sure what is inventory control.In fact, from the perspective of broadly understood, inventory control, shouldinclude the following:First, the fundamental purpose of inventory control. We know that the so-called world-class manufacturing, two key assessment indicators (KPI) is, customer satisfaction and inventory turns, inventory turns and this is actually the fundamental objective of inventory control.Second, inventory control means. Increase inventory turns, relying solely on the so-called physical inventory control is not enough, it should be the demand and supply chain management process flow of this large output, and this big warehouse management processes in addition to including this link, the more important The section also includes: forecasting and order processing, production planning and control, materials planning and purchasing control, inventory planning and forecasting in itself, as well as finished products, raw materials, distribution and delivery of the strategy, and even customs management processes.And with the demand and supply chain management processes throughout the process, it is the information flow and capital flow management. In other words, inventory itself is across the entire demand and supply management processes in all aspects of inventory control in order to achieve the fundamental purpose, it must control all aspects of inventory, rather than just manage the physical inventory at hand.Third, inventory control, organizational structure and assessment.Since inventory control is the demand and supply chain management processes, output, inventory control to achieve the fundamental purpose of this process must be compatible with a rational organizational structure. Until now, we can see that many companies have only one purchasing department, purchasing department following pipe warehouse. This is far short of inventory control requirements. From the demand and supply chain management process analysis, we know that purchasing and warehouse management is the executive arm of the typical, and inventory control should focus on prevention, the executive branch is very difficult to "prevent inventory" for the simple reason that they assessment indicatorsin large part to ensure supply (production, customer). How the actual situation, a reasonable demand and supply chain management processes, and thus set the corresponding rational organizational structure and is a question many of our enterprisesto exploreThe role of inventory controlInventory management is an important part of business management. In the production and operation activities, inventory management must ensure that both the production plant for raw materials, spare parts demand, but also directly affect the purchasing, sales of share, sales activities. To make an inventory of corporate liquidity, accelerate cash flow, the security of supply under the premise of minimizing Yaku funds, directly affects the operational efficiency. Ensure the production and operation needs of the premise, so keep inventories at a reasonable level; dynamic inventory control, timely, appropriate proposed order to avoid over storage or out of stock; reduce inventory footprint, lower total cost of inventory; control stock funds used to accelerate cash flow.Problems arising from excessive inventory: increased warehouse space andinventory storage costs, thereby increasing product costs; take a lot of liquidity, resultingin sluggish capital, not only increased the burden of payment of interest, etc., would affect the time value of money and opportunity income; finished products and raw materials caused by physical loss and intangible losses; a large number of enterprise resource idle, affecting their rational allocation and optimization; cover the production, operation of the whole process of the various contradictions and problems, is not conducive to improve the management level.Inventory is too small the resulting problems: service levels caused a decline in the profit impact of marketing and corporate reputation; production system caused by inadequate supply of raw materials or other materials, affecting the normal production process; to shorten lead times, increase the number of orders, so order (production) costs; affect the balance of production and assembly of complete sets.NotesInventory management should particularly consider the following two questions:First, according to sales plans, according to the planned production of the goods circulated in the market, we should consider where, how much storage.Second, starting from the level of service and economic benefits to determine howto ensure inventories and supplementary questions.The two problems with the inventory in the logistics process functions.In general, the inventory function:(1)to prevent interrupted. Received orders to shorten the delivery of goods fromthe time in order to ensure quality service, at the same time to prevent out of stock.(2)to ensure proper inventory levels, saving inventory costs.(3)to reduce logistics costs. Supplement with the appropriate time interval compatible with the reasonable demand of the cargo in order to reduce logistics costs, eliminate or avoid sales fluctuations.(4)ensure the production planning, smooth to eliminate or avoid sales fluctuations.(5)display function.(6)reserve. Mass storage when the price falls, reduce losses, to respond to disasters and other contingencies.About the warehouse (inventory) on what the question, we must consider the number and location. If the distribution center, it should be possible according to customer needs, set at an appropriate place; if it is stored in central places to minimize the complementary principle to the distribution centers, there is no place certain requirements. When the stock base is established, will have to take into account are stored in various locations in what commodities.库存管理库存控制在谈到所谓“库存控制”的时候，很多人将其理解为“仓储管理”，这实际上是个很大的曲解。

室内装饰装修设计外文文献翻译中英文

外文文献翻译(含：英文原文及中文译文)文献出处：Y Miyazaki. A Brief Description of Interior Decoration [J]. Building & Environment, 2005, 40(10):41-45.英文原文A Brief Description of Interior DecorationY Miyazaki一、An interior design element1 Spatial elementsThe rationalization of space and giving people a sense of beauty is the basic task of design. We must dare to explore the new image of the times and technologies that are endowed with space. We should not stick to the spatial image formed in the past.2 color requirementsIn addition to affecting the visual environment, indoor colors also directly affect people's emotions and psychology. Scientific use of color is good for work and helps health. The proper color processing can meet the functional requirements and achieve the beauty effect. In addition to observing the general laws of color, interior colors also vary with the aesthetics of the times.3 light requirementsHumans love the beauty of nature and often direct sunlight into theinterior to eliminate the sense of darkness and closure in the interior, especially the top light and the soft diffuse light, making the interior space more intimate and natural. The transformation of light and shadow makes the interior richer and more colorful, giving people a variety of feelings.4 decorative elementsThe indispensable building components such as columns, walls, and the like in the entire indoor space are combined with the function and need to be decorated to jointly create a perfect indoor environment. By making full use of the texture characteristics of different decorative materials, you can achieve a variety of interior art effects with different styles, while also reflecting the historical and cultural characteristics of the region.5 furnishingsIndoor furniture, carpets, curtains, etc., are all necessities of life. Their shapes are often furnished and most of them play a decorative role. Practicality and decoration should be coordinated with each other, and the functions and forms of seeking are unified and changed so that the interior space is comfortable and full of personality.6 green elementsGreening in interior design is an important means to improve the indoor environment. Indoor flowering trees are planted, and the use ofgreenery and small items to play a role in diffusing indoor and outdoor environments, expanding the sense of interior space, and beautifying spaces all play an active role.二、The basic principles of interior design1 interior decoration design to meet the functional requirementsThe interior design is based on the purpose of creating a good indoor space environment, so as to rationalize, comfort, and scientize the indoor environment. It is necessary to take into account the laws of people's activities to handle spatial relationships, spatial dimensions, and spatial proportions; to rationally configure furnishings and furniture, and to properly resolve indoor environments. V entilation, lighting and lighting, pay attention to the overall effect of indoor tone.2 interior design to meet the spiritual requirementsThe spirit of interior design is to influence people's emotions and even influence people's will and actions. Therefore, we must study the characteristics and laws of people's understanding; study the emotions and will of people; and study the interaction between people and the environment. Designers must use various theories and methods to impact people's emotions and sublimate them to achieve the desired design effect. If the indoor environment can highlight a certain concept and artistic conception, then it will have a strong artistic appeal and better play its role in spiritual function.3 Interior design to meet modern technical requirementsThe innovation of architectural space is closely related to the innovation of structural modeling. The two should be harmonized and unified, fully considering the image of the structural Sino-U.S. and integrating art and technology. This requires that interior designers must possess the necessary knowledge of the type of structure and be familiar with and master the performance and characteristics of the structural system. Modern interior design is in the category of modern science and technology. To make interior design better meet the requirements of spiritual function, we must maximize the use of the latest achievements in modern science and technology.4 Interior design must meet the regional characteristics and national style requirementsDue to differences in the regions where people live, geographical and climatic conditions, the living habits of different ethnic groups are not the same as cultural traditions, and there are indeed great differences in architectural styles. China is a multi-ethnic country. The differences in the regional characteristics, national character, customs, and cultural literacy of various ethnic groups make indoor decoration design different. Different styles and features are required in the design. We must embody national and regional characteristics to evoke people’s national self-respect and self-confidence.三、Points of interior designThe interior space is defined by the enclosure of the floor, wall, and top surface, thus determining the size and shape of the interior space. The purpose of interior decoration is to create a suitable and beautiful indoor environment. The floor and walls of the interior space are the backdrop for people and furnishings and furnishings, while the differences on the top surface make the interior space more varied.1 Base decoration ----- Floor decorationThe basic surface ----- is very important in people's sights. The ground floor is in contact with people, and the line of sight is near, and it is in a dynamic change. It is one of the important factors of interior decoration. Meet the following principles:2 The base should be coordinated with the overall environment to complement each other and set off the atmosphereFrom the point of view of the overall environmental effect of space, the base should be coordinated with the ceiling and wall decoration. At the same time, it should play a role in setting off the interior furniture and furnishings.3 Pay attention to the division, color and texture of the ground patternGround pattern design can be roughly divided into three situations: The first is to emphasize the independent integrity of the pattern itself,such as meeting rooms, using cohesive patterns to show the importance of the meeting. The color should be coordinated with the meeting space to achieve a quiet, focused effect; the second is to emphasize the pattern of continuity and rhythm, with a certain degree of guidance and regularity, and more for the hall, aisle and common space; third It emphasizes the abstractness of the pattern, freedom, and freedom, and is often used in irregular or layout-free spaces.4 Meeting the needs of the ground structure, construction and physical properties of the buildingWhen decorating the base, attention should be paid to the structure of the ground floor. In the premise of ensuring safety, it is convenient for construction and construction. It cannot be a one-sided pursuit of pattern effects, and physical properties such as moisture-proof, waterproof, thermal insulation, and thermal insulation should be considered. need. The bases are available in a wide variety of types, such as: wooden floors, block floors, terrazzo floors, plastic floors, concrete floors, etc., with a wide variety of patterns and rich colors. The design must be consistent with the entire space environment. Complementary to achieve good results.四、wall decorationIn the scope of indoor vision, the vertical line of sight between the wall and the person is in the most obvious position. At the same time, thewall is the part that people often contact. Therefore, the decoration of the wall is very important for the interior design. The following design principles must be met: 1 IntegrityWhen decorating a wall, it is necessary to fully consider the unity with other parts of the room, and to make the wall and the entire space a unified whole.2 PhysicalThe wall surface has a larger area in the interior space, and the status is more important and the requirements are higher. The requirements for sound insulation, warmth protection, fire prevention, etc. in the interior space vary depending on the nature of the space used, such as the guest room, high requirements. Some, while the average unit canteen, requiresa lower number.3 ArtistryIn the interior space, the decorative effect of the wall plays an important role in rendering and beautifying the indoor environment. The shape of the wall, the partition pattern, the texture and the interior atmosphere are closely related to each other. In order to create the artistic effect of the interior space, the wall The artistry of the surface itself cannot be ignored.The selection of wall decoration styles is determined according to the above principles. The forms are roughly the following: plasteringdecoration, veneering decoration, brushing decoration, coil decoration. Focusing on the coil decoration here, with the development of industry, there are more and more coils that can be used to decorate walls, such as: plastic wallpaper, wall cloth, fiberglass cloth, artificial leather, and leather. These materials are characterized by the use of It is widely used, flexible and free, with a wide variety of colors, good texture, convenient construction, moderate prices, and rich decorative effects. It is a material that is widely used in interior design.五、Ceiling decorationThe ceiling is an important part of the interior decoration, and it is also the most varied and attractive interface in the interior space decoration. It has a strong sense of perspective. Through different treatments, the styling of lamps and lanterns can enhance the space appeal and make the top surface rich in shape. Colorful, novel and beautiful.1 Design principlesPay attention to the overall environmental effects.The ceiling, wall surface and base surface together make up the interior space and jointly create the effects of the indoor environment. The design should pay attention to the harmonization of the three, and each has its own characteristics on a unified basis.The top decoration should meet the applicable aesthetic requirements.In general, the effect of indoor space should be lighter and lighter. Therefore, it is important to pay attention to the simple decoration of the top decoration, highlight the key points, and at the same time, have a sense of lightness and art.The top decoration should ensure the rationality and safety of the top structure. Cannot simply pursue styling and ignore safety2 top design(1) Flat roofThe roof is simple in construction, simple in appearance, and convenient in decoration. It is suitable for classrooms, offices, exhibition halls, etc. Its artistic appeal comes from the top shape, texture, patterns, and the organic configuration of the lamps.(2) Convex ceilingThis kind of roof is beautiful and colorful, with a strong sense of three-dimensionality. It is suitable for ballrooms, restaurants, foyers, etc. It is necessary to pay attention to the relationship between the primary and secondary relationships and the height difference of various concavo-convex layers. It is not appropriate to change too much and emphasize the rhythm of rhythm and the artistry of the overall space. .(3) Suspended ceilingV arious flaps, flat plates or other types of ceilings are hung under the roof load-bearing structures. These ceilings are often used to meetacoustic or lighting requirements or to pursue certain decorative effects. They are often used in stadiums, cinemas, and so on. In recent years, this type of roof has also been commonly used in restaurants, cafes, shops, and other buildings to create special aesthetics and interests.(4) Well format ceilingIt is in the form of a combined structural beam, in which the main and secondary beams are staggered and the relationship between the wells and beams, together with a ceiling of lamps and gypsum floral designs, is simple and generous, with a strong sense of rhythm.(5) Glass ceilingThe halls and middle halls of modern large-scale public buildings are commonly used in this form, mainly addressing the needs of large-scale lighting and indoor greening, making the indoor environment richer in natural appeal, and adding vitality to large spaces. It is generally in the form of a dome, a cone, and a zigzag. In short, interior decoration design is a comprehensive discipline, involving many disciplines such as sociology, psychology, and environmental science, and there are many things that we need to explore and study. This article mainly elaborated the basic principles and design methods of interior decoration design. No matter what style belongs to the interior design door, this article gives everyone a more in-depth understanding and comprehension of interior design. If there are inadequacies, let the criticism correct me.中文译文室内装饰简述Y Miyazaki一室内装饰设计要素1 空间要素空间的合理化并给人们以美的感受是设计基本的任务。

中英文文献以及翻译(化工类)

Foreign material：Chemical Industry1.Origins of the Chemical IndustryAlthough the use of chemicals dates back to the ancient civilizations, the evolution of what we know as the modern chemical industry started much more recently. It may be considered to have begun during the Industrial Revolution, about 1800, and developed to provide chemicals roe use by other industries. Examples are alkali for soapmaking, bleaching powder for cotton, and silica and sodium carbonate for glassmaking. It will be noted that these are all inorganic chemicals. The organic chemicals industry started in the 1860s with the exploitation of William Henry Perkin’s discovery if the first synthetic dyestuff—mauve. At the start of the twentieth century the emphasis on research on the applied aspects of chemistry in Germany had paid off handsomely, and by 1914 had resulted in the German chemical industry having 75% of the world market in chemicals. This was based on the discovery of new dyestuffs plus the development of both the contact process for sulphuric acid and the Haber process for ammonia. The later required a major technological breakthrough that of being able to carry out chemical reactions under conditions of very high pressure for the first time. The experience gained with this was to stand Germany in good stead, particularly with the rapidly increased demand for nitrogen-based compounds (ammonium salts for fertilizers and nitric acid for explosives manufacture) with the outbreak of world warⅠin 1914. This initiated profound changes which continued during the inter-war years (1918-1939).Since 1940 the chemical industry has grown at a remarkable rate, although this has slowed significantly in recent years. The lion’s share of this growth has been in the organic chemicals sector due to the development and growth of the petrochemicals area since 1950s. The explosives growth in petrochemicals in the 1960s and 1970s was largely due to the enormous increase in demand for synthetic polymers such as polyethylene, polypropylene, nylon, polyesters and epoxy resins.The chemical industry today is a very diverse sector of manufacturing industry, within which it plays a central role. It makes thousands of different chemicals whichthe general public only usually encounter as end or consumer products. These products are purchased because they have the required properties which make them suitable for some particular application, e.g. a non-stick coating for pans or a weedkiller. Thus chemicals are ultimately sold for the effects that they produce.2. Definition of the Chemical IndustryAt the turn of the century there would have been little difficulty in defining what constituted the chemical industry since only a very limited range of products was manufactured and these were clearly chemicals, e.g., alkali, sulphuric acid. At present, however, many intermediates to products produced, from raw materials like crude oil through (in some cases) many intermediates to products which may be used directly as consumer goods, or readily converted into them. The difficulty cones in deciding at which point in this sequence the particular operation ceases to be part of the chemical industry’s sphere of activities. To consider a specific example to illustrate this dilemma, emulsion paints may contain poly (vinyl chloride) / poly (vinyl acetate). Clearly, synthesis of vinyl chloride (or acetate) and its polymerization are chemical activities. However, if formulation and mixing of the paint, including the polymer, is carried out by a branch of the multinational chemical company which manufactured the ingredients, is this still part of the chemical industry of does it mow belong in the decorating industry?It is therefore apparent that, because of its diversity of operations and close links in many areas with other industries, there is no simple definition of the chemical industry. Instead each official body which collects and publishes statistics on manufacturing industry will have its definition as to which operations are classified as the chemical industry. It is important to bear this in mind when comparing statistical information which is derived from several sources.3. The Need for Chemical IndustryThe chemical industry is concerned with converting raw materials, such as crude oil, firstly into chemical intermediates and then into a tremendous variety of other chemicals. These are then used to produce consumer products, which make our livesmore comfortable or, in some cases such as pharmaceutical produces, help to maintain our well-being or even life itself. At each stage of these operations value is added to the produce and provided this added exceeds the raw material plus processing costs then a profit will be made on the operation. It is the aim of chemical industry to achieve this.It may seem strange in textbook this one to pose the question “do we need a chemical industry?” However trying to answer this question will provide(ⅰ) an indication of the range of the chemical industry’s activities, (ⅱ) its influence on our lives in everyday terms, and (ⅲ) how great is society’s need for a chemical industry. Our approach in answering the question will be to consider the industry’s co ntribution to meeting and satisfying our major needs. What are these? Clearly food (and drink) and health are paramount. Other which we shall consider in their turn are clothing and (briefly) shelter, leisure and transport.(1)Food. The chemical industry makes a major contribution to food production in at least three ways. Firstly, by making available large quantities of artificial fertilizers which are used to replace the elements (mainly nitrogen, phosphorus and potassium) which are removed as nutrients by the growing crops during modern intensive farming. Secondly, by manufacturing crop protection chemicals, i.e., pesticides, which markedly reduce the proportion of the crops consumed by pests. Thirdly, by producing veterinary products which protect livestock from disease or cure their infections.(2)Health. We are all aware of the major contribution which the pharmaceutical sector of the industry has made to help keep us all healthy, e.g. by curing bacterial infections with antibiotics, and even extending life itself, e.g. ß–blockers to lower blood pressure.(3)Clothing. The improvement in properties of modern synthetic fibers over the traditional clothing materials (e.g. cotton and wool) has been quite remarkable. Thus shirts, dresses and suits made from polyesters like Terylene and polyamides like Nylon are crease-resistant, machine-washable, and drip-dry or non-iron. They are also cheaper than natural materials.Parallel developments in the discovery of modern synthetic dyes and the technology to “bond” th em to the fiber has resulted in a tremendous increase in the variety of colors available to the fashion designer. Indeed they now span almost every color and hue of the visible spectrum. Indeed if a suitable shade is not available, structural modification of an existing dye to achieve this canreadily be carried out, provided there is a satisfactory market for the product.Other major advances in this sphere have been in color-fastness, i.e., resistance to the dye being washed out when the garment is cleaned.(4)Shelter, leisure and transport. In terms of shelter the contribution of modern synthetic polymers has been substantial. Plastics are tending to replace traditional building materials like wood because they are lighter, maintenance-free (i.e. they are resistant to weathering and do not need painting). Other polymers, e.g. urea-formaldehyde and polyurethanes, are important insulating materials f or reducing heat losses and hence reducing energy usage.Plastics and polymers have made a considerable impact on leisure activities with applications ranging from all-weather artificial surfaces for athletic tracks, football pitches and tennis courts to nylon strings for racquets and items like golf balls and footballs made entirely from synthetic materials.Like wise the chemical industry’s contribution to transport over the years has led to major improvements. Thus development of improved additives like anti-oxidants and viscosity index improves for engine oil has enabled routine servicing intervals to increase from 3000 to 6000 to 12000 miles. Research and development work has also resulted in improved lubricating oils and greases, and better brake fluids. Yet again the contribution of polymers and plastics has been very striking with the proportion of the total automobile derived from these materials—dashboard, steering wheel, seat padding and covering etc.—now exceeding 40%.So it is quite apparent even from a brief look at the chemical industry’s contribution to meeting our major needs that life in the world would be very different without the products of the industry. Indeed the level of a country’s development may be judged by the production level and sophistication of its chemical industry4. Research and Development (R&D) in Chemical IndustriesOne of the main reasons for the rapid growth of the chemical industry in the developed world has been its great commitment to, and investment in research and development (R&D). A typical figure is 5% of sales income, with this figure being almost doubled for the most research intensive sector, pharmaceuticals. It is important to emphasize that we are quoting percentages here not of profits but of sales income, i.e. the total money received, which has to pay for raw materials, overheads, staff salaries, etc. as well. In the past this tremendous investment has paid off well, leading to many useful and valuable products being introduced to the market. Examplesinclude synthetic polymers like nylons and polyesters, and drugs and pesticides. Although the number of new products introduced to the market has declined significantly in recent years, and in times of recession the research department is usually one of the first to suffer cutbacks, the commitment to R&D remains at a very high level.The chemical industry is a very high technology industry which takes full advantage of the latest advances in electronics and engineering. Computers are very widely used for all sorts of applications, from automatic control of chemical plants, to molecular modeling of structures of new compounds, to the control of analytical instruments in the laboratory.Individual manufacturing plants have capacities ranging from just a few tones per year in the fine chemicals area to the real giants in the fertilizer and petrochemical sectors which range up to 500,000 tonnes. The latter requires enormous capital investment, since a single plant of this size can now cost $520 million! This, coupled with the widespread use of automatic control equipment, helps to explain why the chemical industry is capital-rather than labor-intensive.The major chemical companies are truly multinational and operate their sales and marketing activities in most of the countries of the world, and they also have manufacturing units in a number of countries. This international outlook for operations, or globalization, is a growing trend within the chemical industry, with companies expanding their activities either by erecting manufacturing units in other countries or by taking over companies which are already operating there.化学工业1.化学工业的起源尽管化学品的使用可以追溯到古代文明时代，我们所谓的现代化学工业的发展却是非常近代（才开始的）。

现代包装机械设备毕业课程设计外文文献翻译、中英文翻译

1 英文文献翻译1.1 Modern PackagingAuthor：Abstract1. Changing Needs and New RolesLooking back, historical changes are understandable and obvious. That all of them have had an impact on the way products are brought, consumed and packaged is also obvious. What is not so obvious is what tomorrow will bring. Yet, it is to the needs, markets, and conditions of tomorrow that packaging professionals must always turn their attention.The forces that drove packaging during the Industry Revolution continue to operate today. The consumer society continues to grow and is possibly best described by a 1988s bumper sticker, “Born to Shop”. We consume goods today at a rate 4 to 5 times greater than we did as recently as 1935. Most of these goods are not essential to survival; they constitute what we may call “the good life”.In the second half of the 20th century， the proliferation of goods was so high that packaging was forced into an entirely new role, that of providing the motivation rather than presenting the goods itself. On a shelf of 10 competing products, all of them similar in performance and quality, the only method of differentiating became the package itself. Marketer aimed at lifestyles, emotional values, subliminal images, features, and advantages beyond the basic product rather than the competitor’s. In some in instances, the package has become the product, and occasionally packaging has become entertainment.A brand product to carry the product manufacturer or product sales of theretailer’s label, usually by the buyer as a quality assessment guidance. In some cases, competing brands of product quality is almost no difference, a difference is the sale of its packaging. An interesting visually attractive packaging can give a key marketing advantage and convince impulse spending. However, the packaging should accurately reflect the quality of products/brand value in order to avoid the disappointment of consumers, encourage repeat purchases and build brand loyalty. Ideally, the product should exceed customer expectations.2. Packaging and the Modern Industrial SocietyThe importance of packaging to a modern industrial society is most evident when we examine the food-packaging sector. Food is organic in nature, having an animal or plant source. One characteristic of such organic matter is that, by and large, it has a limited natural biological life.A cut of meat, left to itself, might be unfit for human consumption by the next day. Some animal protein products, such as seafood, can deteriorate within hours.The natural shelf life of plant-based food depends on the species and plant involved. Pulpy fruit portions tend to have a short life span, while seed parts, which in nature have to survive at least separated from the living plant are usually short-lived.In addition to having a limited natural shelf life, most food is geographically and season-ally specific. Thus, potatoes and apples are grown in a few North American geographical regions and harvest during a short maturation period. In a world without packaging，we would need to live at the point of harvest to enjoy these products, and our enjoyment of them would be restricted to the natural biological life span of each. It is by proper storage, packaging and transport techniques that we are able to deliver fresh potatoes and apples, or the products derived from them, throughout the year and throughout the country. Potato-whole,canned, powdered, flaked, chipped, frozen, and instant is available, anytime, anywhere. This ability gives a society great freedom and mobility. Unlike less-developed societies, we are no longer restricted in our choice of where to live, since we are no longer tied to the food-producing ability of an area. Food production becomes more specialized and efficient with the growth of packaging. Crops and animal husbandry are moved to where their production is most economical, without regard to the proximity of a market. Most important, we are free of the natural cycles of feast and famine that are typical of societies dependent on natural regional food-producing cycles.Central processing allows value recovery from what would normally be waste by products of the processed food industry from the basis of other sub-industries. Chicken feathers are high in protein and, properly mill and treated, can be fed back to the next generation of chickens. Vegetable waste is fed to cattle or pigs. Bagasse, the waste cane from sugar pressing, is a source of fiber for papermaking. Fish scales are refined to make additives for paints and nail polish.The economical manufacture of durable goods also depends on good packaging.A product's cost is directly related to production volume. The business drive to reduce costs in the supply chain must be carefully balanced against the fundamental technical requirements for food safety and product integrity, as well as the need to ensure an. efficient logistics service. In addition, there is a requirement to meet the aims of marketing to protect and project brand image through value-added pack design. The latter may involve design inputs that communicate distinctive, aesthetically pleasing, ergonomic, functional and/or environmentally aware attributes. But for a national or international bicycle producer to succeed, it must be a way of getting the product to a market, which may be half a world away. Again, sound packaging, in this case distributionpackaging, is a key part of the system.Some industries could not exist without an international market. For example, Canada is a manufacturer of irradiation equipment, but the Canadian market (which would account for perhaps one unit every several years) could not possibly support such a manufacturing capability. However, by selling to the world, a manufacturing facility becomes viable. In addition to needing packaging for the irradiation machinery and instrumentation, the sale of irradiation equipment requires the sale packaging and transport of radioactive isotopes, a separate challenge in itself. In response to changing consumer lifestyles, the large retail groups and the food service industry development. Their success has been involved in a competition fierce hybrid logistics, trade, marketing and customer service expertise, all of which is dependent on the quality of packaging. They have in part led to the expansion of the dramatic range of products offered, technology innovation, including those in the packaging. Supply retail, food processing and packaging industry will continue to expand its international operations. Sourcing products around the world more and more to assist in reducing trade barriers. The impact of the decline has been increased competition and price pressure. Increased competition led to the rationalization of industrial structure, often in the form of mergers and acquisitions. Packaging, it means that new materials and shapes, increased automation, packaging, size range extension of lower unit cost. Another manufacturer and mergers and acquisitions, the Group's brand of retail packaging and packaging design re-evaluation of the growing development of market segmentation and global food supply chain to promote the use of advanced logistics and packaging systems packaging logistics system is an integral part of, and played an important role in prevention in the food supply or reduce waste generation.3. World Packaging.This discussion has referred to primitive packaging and the evolution of packaging functions. However, humankind's global progress is such that virtually every stage in the development of society and packaging is present somewhere in the world today. Thus, a packager in a highly developed country will agonize over choice of package type, hire expensive marketing groups to develop images to entice the targeted buyer and spend lavishly on graphics. In less-developed countries, consumers are happy to have food, regardless of the package. At the extreme, consumers will bring their own packages or will consume food on the spot, just as they did 2000 years ago.Packagers from the more developed countries sometimes have difficulty working with less-developed nations, for the simple reason that they fail to understand that their respective packaging priorities are completely different. Similarly, developing nations trying to sell goods to North American markets cannot understand our preoccupation with package and graphics.The significant difference is that packaging plays a different role in a market where rice will sell solely because it is available. In the North American market, the consumer may be confronted by five different companies offering rice in 30 or so variations. If all the rice is good and none is inferior, how does a seller create a preference for his particular rice? How does he differentiate? The package plays a large role in this process.The package-intensive developed countries are sometimes criticized for over packaging, and certainly over-packaging does exist. However, North Americans also enjoy the world's cheapest food, requiring only about 11 to 14% of our disposable income. European food costs are about 20% of disposable income, and in the less-developed countries food can take 95%of family income.4. The status and development trend of domestic and international packaging machineryWorldwide, the history of the development of the packaging machinery industry is relatively short, science and technology developed in Europe and America in general started in the 20th century until the 1950s the pace greatly accelerated.From the early 20th century, before the end of World War II World War II，medicine，food, cigarettes，matches，household chemicals and other industrial sectors, the mechanization of the packaging operations; the 1950s, the packaging machine widely used common electric switches and tube for the main components of the control system to achieve the primary automation; 1960s, Electrical and optical liquid-gas technology is significantly increased in the packaging machine, machines to further expand on this basis a dedicated automated packaging line; the 1970s, the micro- electronic technology into the automation of packaging machines and packaging lines, computer control packing production process; from the 1980s to the early 1990s, in some field of packaging, computer, robot application for service, testing and management, in preparation for the over-flexible automatic packaging lines and "no" automatic packaging workshop.Actively promoted and strong co-ordination of all aspects of society, and gradually establish a packaging material, packaging, printing, packaging machinery and other production sectors, and corresponding to the research, design, education, academic, management and organization, and thus the formation of independent and complete. The packaging of light industrial system, and occupies an important place in the national economy as a whole.Based on recent years data that members of the World Packaging Alliance output value of the packaging industry accounts for about 2% of the total output value of the national economy; in which the proportion of packaging machinery, though not large, but the rapid development of an annual average of almost growing at a rate of about 10%. Put into use at the packaging machine is now more than thousand species of packaging joint machines and automated equipment has been stand-alone equate. According to the new technological revolution in the world development trend is expected to packaging materials and packaging process and packaging machinery will be closely related to obtain the breakthrough of a new step, and bring more sectors into the packaging industry.China Packaging Technology Association was established in 1980. Soon, the China National Packaging Corporation have been born. Since then, one after another in the country organized a national and international packaging machinery exhibition, seminars, also published I had the first ever "China Packaging Yearbook and other packaging technology books. All this indicates that China is creating a new packaging historical perio d.1.2中文翻译现代包装1、不断变化的需求和新的角色,回顾以往,包装所带来明显的历史性变化是可以理解的, 一个产品包装方式的给他们的销量带来的影响也是显而易见的。

英文文献全文翻译

英文文献全文翻译全文共四篇示例，供读者参考第一篇示例：LeGuin, Ursula K. (December 18, 2002). "Dancing at the Edge of the World: Thoughts on Words, Women, Places".《世界边缘的舞蹈：关于语言、女性和地方的思考》Introduction:In "Dancing at the Edge of the World," Ursula K. LeGuin explores the intersection of language, women, and places. She writes about the power of words, the role of women in society, and the importance of our connection to the places we inhabit. Through a series of essays, LeGuin invites readers to think critically about these topics and consider how they shape our understanding of the world.Chapter 1: LanguageConclusion:第二篇示例：IntroductionEnglish literature translation is an important field in the study of language and culture. The translation of English literature involves not only the linguistic translation of words or sentences but also the transfer of cultural meaning and emotional resonance. This article will discuss the challenges and techniques of translating English literature, as well as the importance of preserving the original author's voice and style in the translated text.Challenges in translating English literature第三篇示例：Title: The Importance of Translation of Full English TextsTranslation plays a crucial role in bringing different languages and cultures together. More specifically, translating full English texts into different languages allows for access to valuable information and insights that may otherwise be inaccessible to those who do not speak English. In this article, we will explore the importance of translating full English texts and the benefits it brings.第四篇示例：Abstract: This article discusses the importance of translating English literature and the challenges translators face when putting together a full-text translation. It highlights the skills and knowledge needed to accurately convey the meaning and tone of the original text while preserving its cultural and literary nuances. Through a detailed analysis of the translation process, this article emphasizes the crucial role translators play in bridging the gap between languages and making English literature accessible to a global audience.IntroductionEnglish literature is a rich and diverse field encompassing a wide range of genres, styles, and themes. From classic works by Shakespeare and Dickens to contemporary novels by authors like J.K. Rowling and Philip Pullman, English literature offers something for everyone. However, for non-English speakers, accessing and understanding these works can be a challenge. This is where translation comes in.Translation is the process of rendering a text from one language into another, while striving to preserve the original meaning, tone, and style of the original work. Translating afull-length English text requires a deep understanding of both languages, as well as a keen awareness of the cultural andhistorical context in which the work was written. Additionally, translators must possess strong writing skills in order to convey the beauty and complexity of the original text in a new language.Challenges of Full-text TranslationTranslating a full-length English text poses several challenges for translators. One of the most significant challenges is capturing the nuances and subtleties of the original work. English literature is known for its rich and layered language, with intricate wordplay, metaphors, and symbolism that can be difficult to convey in another language. Translators must carefully consider each word and phrase in order to accurately convey the author's intended meaning.Another challenge of full-text translation is maintaining the author's unique voice and style. Each writer has a distinct way of expressing themselves, and a good translator must be able to replicate this voice in the translated text. This requires a deep understanding of the author's writing style, as well as the ability to adapt it to the conventions of the target language.Additionally, translators must be mindful of the cultural and historical context of the original work. English literature is deeply rooted in the history and traditions of the English-speaking world, and translators must be aware of these influences in orderto accurately convey the author's intended message. This requires thorough research and a nuanced understanding of the social, political, and economic factors that shaped the work.Skills and Knowledge RequiredTo successfully translate a full-length English text, translators must possess a wide range of skills and knowledge. First and foremost, translators must be fluent in both the source language (English) and the target language. This includes a strong grasp of grammar, syntax, and vocabulary in both languages, as well as an understanding of the cultural and historical context of the works being translated.Translators must also have a keen eye for detail and a meticulous approach to their work. Every word, sentence, and paragraph must be carefully considered and translated with precision in order to accurately convey the meaning of the original text. This requires strong analytical skills and a deep understanding of the nuances and complexities of language.Furthermore, translators must possess strong writing skills in order to craft a compelling and engaging translation. Translating a full-length English text is not simply a matter of substituting one word for another; it requires creativity, imagination, and a deep appreciation for the beauty of language. Translators mustbe able to capture the rhythm, cadence, and tone of the original work in their translation, while also adapting it to the conventions of the target language.ConclusionIn conclusion, translating a full-length English text is a complex and challenging task that requires a high level of skill, knowledge, and creativity. Translators must possess a deep understanding of both the source and target languages, as well as the cultural and historical context of the work being translated. Through their careful and meticulous work, translators play a crucial role in making English literature accessible to a global audience, bridging the gap between languages and cultures. By preserving the beauty and complexity of the original text in their translations, translators enrich our understanding of literature and bring the works of English authors to readers around the world.。

英文文献+翻译

Characterization of production of Paclitaxel and related Taxanes in Taxus Cuspidata Densiformis suspension cultures by LC,LC/MS, and LC/MS/MSCHAPTER THEREPLANT TISSUE CULTUREⅠ. Potential of Plant cell Culture for Taxane ProductionSeveral alternative sources of paclitaxel have been identified and are currently the subjects of considerable investigation worldwide. These include the total synthesis and biosynthesis of paclitaxel, the agriculture supply of taxoids from needles of Taxus species, hemisynthesis (the attachment of a side chain to biogenetic precursors of paclitaxel such as baccatin Ⅲ or 10-deacetylbaccatin Ⅲ), fungus production, and the production of taxoids by cell and tissue culture. This reciew will concentrate only on the latter possibility.Plant tissue culture is one approach under investigation to provide large amounts and a stable supply of this compound exhibiting antineoplastic activity. A process to produce paclitaxel or paclitaxel-like compounds in cell culture has already been parented. The development of fast growing cell lines capable of producing paclitaxel would not only solve the limitations in paclitaxel supplies presently needed for clinical use, but would also help conserve the large number of trees that need to be harvested in order to isolate it. Currently, scientists and researchers have been successful in initiating fast plant growth but with limited paclitaxel production or vice versa. Therefore, it is the objective of researchers to find a method that will promote fast plant growth and also produce a large amount of paclitaxel at the same time.Ⅱ. Factors Influencing Growth Paclitaxel ContentA.Choice of Media for GrowthGamborg's (B5) and Murashige & Skoog's (MS) media seem to be superior for callus growth compared to White's (WP) medium. The major difference between these two media is that the MS medium contains 40 mM nitrate and 20mM ammonium, compared to 25mM nitrate and 2mM ammonium. Many researchers have selected the B5 medium over the MS medium for all subsequent studies, although they achieve similar results.Gamborg's B5 media was used throughout our experiments for initiation of callus cultures and suspension cultures due to successful published results. It was supplemented with 2% sucrose, 2 g/L casein hydrolysate, 2.4 mg/L picloram, and 1.8 mg/L α-naphthalene acetic acid. Agar (8 g/L) was used for solid cultures.B. Initiation of Callus CulturesPrevious work indicated that bark explants seem to be the most useful for establishing callus. The age of the tree did not appear to affect the ability to initiate callus when comparing both young and old tree materials grown on Gamborg's B5 medium supplemented with 1-2 mg/L of 2,4-dichlorophenoxyacetic acid. Callus cultures initiated and maintained in total darkness were generally pale-yellow to light brown in color. This resulted in sufficient masses of friable callus necessary for subculture within 3-4 weeks. However, the growth rate can decline substantially following the initial subculture and result in very slow-growing, brown-colored clumps of callus. It has been presumed that these brown-colored exudates are phenolic in nature and can eventually lead to cell death. This common phenomenon is totally random and unpredictable. Once this phenomenon has been triggered, the cells could not be saved by placing them in fresh media. However, adding polyvinylpyrrolidone to the culture media can help keep the cells alive and growing. Our experience with callus initiationwas similar to those studies.Our studies have found that callus which initiated early (usually within 2 weeks ) frequently did not proliferate when subcultured and turned brown and necrotic. In contrast, calli which developed from 4 weeks to 4 months after explants were fist placed on initiation media were able to be continuously subcultured when transferred at 1-2 month intervals. The presence of the survival of callus after subsequent subculturing. The relationship between paclitaxel concentration and callus initiation, however, has not been clarified.C. Effect of SugarSucrose is the preferred carbon source for growth in plant cell cultures, although the presence of more rapidly metabolized sugar such as glucose favors fast growth. Other sugars such as lactose, galactose, glucose, and fructose also support cell growth to some extent. On the other hand, sugar alcohols such as mannitol and sorbital which are generally used to raise the sugars added play a major role in the production of paclitaxel. In general, raising the initial sugar levels lead to an increase of secondary metabolite production. High initial levels of sugar increase the osmotic potential, although the role of osmotic pressure on the synthesis of secondary metabolites is not cleat. Kim and colleagues have shown that the highest level of paclitaxel was obtained with fructosel. The optimum concentration of each sugar for paclitaxel production was found to be the same at 6% in all cases. Wickremesinhe and Arteca have provided additional support that fructose is the most effective for paclitaxel production. However, other combinations of sugars such as sucrose combined with glucose also increased paclitaxel production.The presence of extracellular invertase activity and rapid extracellular sucrose hydrolysis has been observed in many cell cultures. These reports suggest that cells secrete or possess on their surface excess amounts of invertase, which result in the hydrolysis of sucrose at a much faster rate. The hydrolysis of sucrose coupled with the rapid utilization of fructose in the medium during the latter period of cell growth. This period of increased fructose availability coincided with the faster growth phase of the cells.D. Effect of Picloram and Methyl JasmonatePicloram (4-amino-3.5.6-trichloropicolinic acid) increases growth rate while methyl jasmonate has been reported to be an effective elicitor in the production of paclitaxel and other taxanes. However, little is known about the mechanisms or pathways that stimulate these secondary metabolites.Picloram had been used by Furmanowa and co-workers and Ketchum and Gibson but no details on the effect of picloram on growth rates were given. Furmanowa and hid colleagues observed growth of callus both in the presence and absence of light. The callus grew best in the dark showing a 9.3 fold increase, whereas there was only a 2-4 fold increase in the presence of light. Without picloram, callus growth was 0.9 fold. Unfortunately,this auxin had no effect on taxane production and the high callus growth rate was very unstable.Jasmonates exhibit various morphological and physiological activities when applied exogenously to plants. They induce transcriptional activation of genes involved in the formation of secondary metabolites. Methyl jasmonate was shown to stimulate paclitaxel and cephalomannine (taxane derivative) production in callus and suspension cultures. However, taxane production was best with White's medium compared to Gamborg's B5 medium. This may be due to the reduced concentration of potassium nitrate and a lack of ammonium sulfate with White's medium.E. Effect of Copper Sulfate and Mercuric ChlorideMetal ions have shown to play significant roles in altering the expression of secondary metabolic pathways in plant cell culture. Secondary metabolites,such as furano-terpenes, have been production by treatment of sweet potato root tissue with mercuric chloride. The results for copper sulfate, however, have not been reported. F. Growth Kinetics and Paclitaxel ProductionLow yields of paclitaxel may be attributed to the kinetics of taxane production that is not fully understood. Many reports stated inconclusive results on the kinetics of taxane production. More studies are needed in order to quantitate the taxane production. According to Nett-Fetto, the maximum instantaneous rate of paclitaxel production occurred at the third week upon further incubation. The paclitaxel level either declined or was not expected to increase upon further incubation. Paclitaxel production was very sensitive to slight variations in culture conditions. Due to this sensitivity, cell maintenance conditions, especially initial cell density, length of subculture interval, and temperature must be maintained as possible.Recently, Byun and co-workers have made a very detailed study on the kinetics of cell growth and taxane production. In their investigation, it was observed that the highest cell weight occurred at day 7 after inoculation. Similarly, the maximum concentration for 10-deacetyl baccatin Ⅲ and baccatin Ⅲ were detected at days 5 and 7, respectively. This result indicated that they are metabolic intermediates of paclitaxel. However, paclitaxel's maximum concentration was detected at day 22 but gradually declined. Byun and his colleagues suggested that paxlitaxel could be a metabolic intermediate like 10-deacetyl baccatin Ⅲ and baccatin Ⅲ or that pacliltaxel could be decomposed due to cellular morphological changes or DNA degradation characteristic of cell death.Pedtchanker's group also studied the kinetics of paclitaxel production by comparing the suspension cultures in shake flasks and Wilson-type reactors where bubbled air provided agitation and mixing. It was concluded that these cultures of Taxus cuspidata produced high levels of paclitaxel within three weeks (1.1 mg/L per day ). It was also determined that both cultures of the shake flask and Wilson-type reactor produced similar paclitaxel content. However, the Wilson-type reactor had a more rapid uptake of the nutrients (i.e. sugars, phosphate, calcium, and nitrate). This was probably due to the presence of the growth ring in the Wilson reactor. Therefor, the growth rate for the cultures from the Wilson reactor was only 135 mg./L while the shake flasks grew to 310 mg/L in three weeks.In retrospect, strictly controlled culture conditions are essential to consistent production and yield. Slight alterations in media formulations can have significant effects upon the physiology of cells, thereby affecting growth and product formation. All of the manipulations that affect growth and production of plant cells must be carefully integrated and controlled in order to maintain cell viability and stability.利用LC,LC/MS和LC/MS/MS悬浮培养生产紫杉醇及邓西佛米斯红豆杉中相关紫杉醇类的特征描述第三章植物组织培养Ⅰ.利用植物细胞培养生产紫杉的可能性紫杉醇的几个备选的来源已被确定，而且目前是全球大量调查的主题。

英文文献翻译一

在无溶剂的条件下，由一种新的催化剂催化的曼尼希反应岳彩波，伊廷锋,，朱传兵,，刘刚化学与化工学院，安徽工业大学，马鞍山，243002，中国文章信息：文章历史：收稿日期2008年9月29日认可时间2009年2月13日COO]（吡啶鎓三氟乙酸盐）被合成和使用于各摘要：一种酸性催化剂—[Py][CF3种芳香醛，芳香酮和芳族胺的曼尼希反应。

在无溶剂的条件下，在室温下进行曼尼希反应可得到理想收率的β-氨基羰基化合物。

通过简单地水洗和去水后，该产品可以从催化剂中分离，催化剂最多可以回收和重复使用达四次，并且不明显降低催化活性。

关键词：曼尼希反应吡啶三氟乙酸β-氨基羰基化合物无溶剂条件1.介绍曼尼希类的反应为β-氨基酮醛的制备提供了一种最经典的和有用的方法，他们组成各种药品，自然产品，多功能合成的中间体[1–4]。

在醛，酮和芳香胺的直接曼尼希反应中传统上习惯使用路易斯酸和质子酸。

但是，这些催化剂有一些严重的缺点。

比如，这些路易斯酸催化的反应，只在严格的无水条件下进行。

此外，许多亚胺在水中不稳定。

再者，从产品中分离常规催化剂也有一定的毒害和困难。

因此，在过去的几十年里，对曼尼希反应新型催化剂的研究已经在合成化学中获得了普及。

如今，已经发现该反应也可以由其他各种各样的催化剂，如脯氨酸[5–8]，布朗斯台德酸性离子液[9–12],，稀土全氟辛烷[13–15]，盐[16–23]等催化。

无溶剂反应在有机合成中非常重要，因为他减少了对环境的污染，节约能源，降低处理成本，简化工作方法[24]。

这里，一种盐，带有弱酸性的[Py][CF3COO]（三氟乙酸吡啶盐）在无水和室温条件下，被用来连续催化三种反应物—芳香醛，芳香酮和芳族胺一锅煮式的曼COO]催化曼尼希反应在公尼希反应（方案一）。

据我们所知，以前没有[Py][CF3开文献的报告。

4a: R1 = H, R2 = H, R3 = H; 4b: R1 = H, R2 = H, R3 = p-CH3; 4c:R1 = H, R2 = H, R3 = p-OCH3; 4d: R1 = H, R2 = H, R3 = p-NO2; 4e:R1 = H,R2 = H,R3 = p-Cl; 4f: R1 = p-CH3, R2 = H,R3 = H; 4g: R1 = p-Cl,R2 = H,R3 = H; 4h: R1 = p-NO2, R2 = H,R3 = H; 4i: R1 = H,R2 = p-CH3,R3 = H; 4j: R1 = H, R2 = p-Cl, R3 = H; 4k: R1 = H, R2 = p-NO2, R3 = H.2. 实验2.1 材料和方法显微镜热板熔点测定仪（未校正），布鲁克500MHz光谱仪（CDCl3为溶剂，TMS为内标准）测氢核磁波谱。

医学英文翻译文献

英文文献翻译第1 篇 Effects of sevoflurane on dopamine, glutamate and aspartate release in an vitro model of cerebral ischaemia七氟醚对离体脑缺血模型多巴胺、谷氨酸和天冬氨酸释放的影响兴奋性氨基酸和多巴胺的释放在脑缺血后神经损伤中起重要作用。

在当前的研究中，采用离体脑缺血模型观察七氟醚对大鼠皮质纹状体脑片中多巴胺、谷氨酸和天冬氨酸释放量的影响。

脑片以34℃人工脑脊液灌流，缺血发作以去除氧气和降低葡萄糖浓度（从4mmol/l至2mmol/l）≤30分钟模拟。

多巴胺释放量用伏特法原位监测，灌流样本中的谷氨酸和天冬氨酸浓度用带有荧光检测的高效液相色谱法测定。

脑片释放的神经递质在有或无4%七氟醚下测定。

对照组脑片诱导缺血后，平均延迟166s（n=5）后细胞外多巴胺浓度达最大77.0μmol/l。

缺血期4%七氟醚降低多巴胺释放速率，（对照组和七氟醚处理组脑片分别是6.9μmol/l/s和4.73μmol/l/s，p<0.05），没有影响它的起始或量。

兴奋性氨基酸的释放更缓慢。

每个脑片基础（缺血前）谷氨酸和天冬氨酸是94.8nmol/l和69.3nmol/l，没有明显被七氟醚减少。

缺血大大地增加了谷氨酸和天冬氨酸释放量（最大值分别是对照组的244%和489%）。

然而，4%七氟醚明显减少缺血诱导的谷氨酸和天冬氨酸释放量。

总结，七氟醚的神经保护作用与其可以减少缺血引起的兴奋性氨基酸的释放有关，较小程度上与多巴胺也有关。

第2篇The Influence of Mitochondrial K ATP-Channels in the Cardioprotection of Proconditioning and Postconditioning by Sevoflurane in the Rat In Vivo线粒体K ATP通道在离体大鼠七氟醚预处理和后处理中心肌保护作用中的影响挥发性麻醉药引起心肌预处理并也能在给予再灌注的开始保护心脏——一种实践目前被称为后处理。

经济学毕业论文英文文献及翻译1

The green barrier to free tradeC. P. ChandrasekharJayati GhoshAs the March 31 deadline for completing the "modalities" stage of the proposed new round of negotiations on global agricultural trade nears, hopes of an agreement are increasingly waning. In this edition of Macroscan, C. P. Chandrasekhar and Jayati Ghosh examine the factors and the players constraining the realisation of such an agreement.AT THE END of the latest round of meetings of the agricultural negotiations committee of the WTO, the optimism that negotiators would meet the March 31 deadline for working out numerical targets, formulas and other "modalities" through which countries can frame their liberalisation commitments in a new full-fledged round of trade negotiations has almost disappeared. That target was important for two reasons.First, it is now becoming clear, that even more than was true during the Uruguay Round, forging an agreement in the agricultural area is bound to prove extremely difficult.Progress in the agricultural negotiations was key to persuading the unconvinced that a new `Doha Round' of trade negotiations is useful and feasible.Second, the Doha declaration made agricultural negotiations one part of a `single undertaking' to be completed by January 1, 2005. That is, in a take `all-or-nothing' scheme, countries had to arrive at, and be bound by, agreements in all areas in which negotiations were to be initiated in the new round. This means that if agreement is not worked out with regard to agriculture, there would be no change in the multilateral trade regime governing industry, services or related areas and no progress in new areas, such as competition policy, foreign investment and public procurement, all of which are crucial to the economic agenda of the developed countries.The factors making agriculture the sticking point on this occasion are numerous. As in the last Round, there is little agreement among the developed countries themselves on the appropriate shape of the global agricultural trade regime.There are substantial differences in the agenda of the US, the EU and the developed countries within the Cairns group of agricultural exporters. When the rich and the powerful disagree, a global consensus is not easy to come by.But that is not all. Even if an agreement is stitched up between the rich nations, through manoeuvres such as the Blair House accord, getting the rest of the world to go along would be more difficult this time.This is because the outcomes in the agricultural trade area since the implementation of the Uruguay Round (UR) Agreement on Agriculture (AoA) began have fallen far short of expectations. In the course of Round, advocates of the UR regime had promised global production adjustments that would increase the value of world agricultural trade and an increase in developing country share of such trade.As Chart 1 shows, global production volumes continued to rise after 1994 when the implementation of the Uruguay Round began, with signs of tapering off only in 2000 and 2001. As is widely known, this increase in production occurred in the developed countries as well.Not surprisingly, therefore, the volume of world trade continued to rise as well after 1994 (Chart 2). The real shift occurred in agricultural prices which, after some buoyancy between 1993and 1995, have declined thereafter, and particularly sharply after 1997. It is this decline in unit values that resulted in a situation where the value of world trade stagnated and then declined after 1995, when the implementation of the Uruguay Round began.As Table 1 shows, there was a sharp fall in the rate of growth of global agricultural trade between the second half of the 1980s and the 1990s, with the decline in growth in the 1990s being due to the particularly poor performance during the 1998 to 2001 period.Price declines and stagnation in agricultural trade values in the wake of the UR Agreement on Agriculture were accompanied and partly influenced by the persisting regionalisation of world agricultural trade.The foci of such regionalisation were Western Europe and Asia, with 32 and 11 per cent of global agricultural trade being intra-Western European and intra-Asian trade respectively (Chart 3). What is noteworthy, however, is that agricultural exports accounted for a much higher share of both merchandise and primary products trade in North America and Western Europe (besides Latin America and Africa) than it did for Asia.Thus, despite being the developed regions of the world, agricultural production and exports were important influences on the economic performance of North America and Western Europe.It is, therefore, not surprising that Europe is keen on maintaining its agricultural sector through protection, while the US is keen on expanding its role in world agricultural markets by subsidising its own farmers and forcing other countries to open up their markets. The problem is that the US has been more successful in prising open developing country markets than the large EU market.Thus, out of $104 billion worth of exports from North America in 2001, $34 billion went to Asia and $15 billion to Latin America, whereas exports to Europe amounted to $14 billion.The Cairns group of exporting countries (Argentina, Australia, Bolivia, Brazil, Canada, Chile, Colombia, Costa Rica, Guatemala, Indonesia, Malaysia, New Zealand, Paraguay, the Philippines, South Africa, Thailand and Uruguay), for some of whom at least agricultural exports are extremely important, want world market to be freed of protection as well as the surpluses that result from huge domestic support in the US and the EC.We must note that $35 billion of the $63 billion of exports from Latin America went to the US and the EU. More open markets and less domestic support in those destinations is, therefore, crucial for the region.The fact that Europe has been successful in its effort at retaining its agricultural space with the help of a Common Agricultural Policy that both supports and subsidises its agricultural producers is clear from Chart 4, which shows that intra-EC trade which accounted for 74 per cent of EU exports in 1990, continued to account for 73 per cent of total EU exports in 1995 and 2001.But North America, with far fewer countries in its fold, has also been quite insular. Close to a third of North American exports are inter-regional. Little has changed since the Uruguay Round Agreement on Agriculture.It is widely accepted that three sets of actors account for this failure of the AoA:First, in order to push through an agreement when there were signs that the Uruguay Round was faltering, the liberalisation of agricultural trade in the developed countries was not pushed far enough;Second, is the ability to use "loopholes", especially those in the form of inadequately well-defined Green and Blue Box measures, in the AoA, to continue to support and protect farmers on the grounds that such support was non-trade distorting; andFinally, there are violations of even the lax UR rules in the course of implementation, which have been aided by the failure of the agreement to ensure transparency in implementation.Not surprisingly, some countries, especially the Cairns group of exporting countries, have proposed an ambitious agenda of liberalisation in the agricultural area.Tariffs are to be reduced sharply, using the "Swiss formula", which would ensure that the proportionate reduction in the tariffs imposed by a country would be larger, the higher is the prevailing bound or applied tariff in that country.中文翻译：题目：自由贸易中的绿色壁垒作者：C. P. Chandrasekhar 、Jayati Ghosh在A完自由化的承诺在其最新一轮会议的农业谈判委员会，世界贸易组织，乐观地认为，谈判的框架将在3月31日最后期限为制定数字指标，公式和其他“方式，哪些国家可以”通过新的全面谈判回合贸易几乎已经消失。

英文科技文献翻译

英文文献翻译二〇一二年五月三十日Integrated wiring systemModern science and technology progress has made rapid development of computer and network technology, provides a more powerful computer processing capacity and network communication ability. The computer and network communication technology can greatly improve the modern enterprise production management efficiency, reduce the operation cost, and makes the modern enterprise can obtain more effectively and timely decision market information, provide more quickly, more satisfactory service to customers, in the competition. The computer and network communication technology has become a key factor in the success of the company.Integrated cabling system in order to meet the development needs is specially designed a set of cabling system. For modern buildings, such as the body, it adopted a series of nerve of high quality standard, modular combinations of material, the voice, data and image and control signal system using uniform transmission media, through comprehensive, integrated unified planning design in a set of standard cabling system in modern architecture, the three subsystems will connect organically, and system integration for the modern architecture provides a physical medium. Structured cabling system can directly related to the success of the modernization of the building, choose a high quality of integrated wiring system is of vital importance.Computer and communication networks are dependent on wiring system as the physical basis of network connections and information transmission channel. The traditional single application on a particular special layout techniques, lack of flexibility and development of, can not meet the rapid development of modern business needs of network applications. The new generation of structured cabling systems provide the user the required data, voice, fax, video and other information service connections, which allows voice and data communications equipment, switching equipment, information management systems and equipment control system , security system connected to each other, but also to make these devices with external communication networks. It includes the building to the external network or phone line connection Bureau,with the work area of voice or data terminals associated with all the cables and wiring components. Cabling system composed by different series of components, including: transmission media, line management of hardware, connectors, sockets, plugs, adapters, transmission electronic circuits, electrical protection equipment and support. Compared with the previous wiring, cabling system features can be summarized as:Practicality: after the implementation of cabling systems will be able to adapt to the modern and future communication technology development and implementation of voice, data, unified communications, signal transmission.Flexibility: wiring system can satisfy the requirements of various applications, information points to any connection of different types of terminal equipment, such as telephone, computer, printer, computer terminal, electric machine, various sensors and image monitoring equipment.Modularity: integrated cabling system in fixed in buildings, the level of all cable connectors are basic type of the standard, all voice, data and interconnection of building automation, network and image, with convenient use, equipment, change, management and expansion.Scalability: integrated wiring system is for future expansion, more use, easy to expand into new equipment.Economy: the integrated wiring system enables managers, and at the same time, reduce the modular structure, work because of the difficulty of future changes greatly reduced the cost or moving system.General: to meet the standard of international communication and computer network topology structure, can adapt different transmission speed communication can adapt to the requirement, can support and accommodate various computer network operation.1 workspace subsystemPurpose is to realize the workspace terminal equipment and level of connections between subsystems, the terminal devices connected to the information socket connection cables. Workspace used computer, networkequipment is distributed (on), telephone, or may alarm detector, camera, monitors, acoustics, etc.2 Horizontal subsystemPurpose is to realize information socket and management subsystem (jumper wire connection between frame), will lead to the management subsystem of user workspace, and to provide users with one accord with international standard pronunciation, satisfy the requirements and the high-speed data transmission information points. The subsystem of information from a job, decorate the socket to the inside of the administrative levels of the cable distribution frames. In the system of transmission medium of UTP (4) shielding twisted-pair cable, it can support the most modern communication equipment. If you need some broadband application, you can use fiber. Information ISDN8 for export by core RJ45 jack (standard), each information socket outlets can be flexibly according to actual application requirements and optional change purposes.3 the management subsystemThis sub-system connected by a cross, composed of interconnect patch panel. Management point of connection means to connect to other subsystems. Cross-connect and interconnect allows communication lines locate or relocate to different parts of the building to make it easier to manage communication lines, so that when the mobile terminal device easily plug. Interconnection distribution frame connections under different hardware sub-floor distribution frame (box) IDF and MDF (box) MDF, IDF can be installed on each floor of the trunk connection between, MDF is usually installed in the equipment room.4 vertical lines subsystemPurpose is to achieve the computer equipment, pabx (PBX), with the management subsystem of control center is building a connection between the main cable, routing. This is usually between two units subsystem, especially in the central point in the public system provides more line facilities. By building the system all vertical lines and more logarithmic cable support hardware, toprovide total distribution frames and main equipment room wiring between floors between the main distribution frames routing. Common medium is multi-cores cable and optical fiber cable twisted-pair.5.Equipment room subsystemThis subsystem is mainly from the devices in the cable, connectors and related hardware support, the role of the computer, PBX, cameras, monitors and other weak and connected to the interconnection of equipment up on the main distribution frame. Equipment includes computer systems, network hub (Hub), network switches (Switch), program-controlled switchboards (PBX), audio output devices, CCTV control devices and alarm control center, etc.6 Buildings subsystem (Campus):The subsystem will be extended to cable a building complex of other buildings of the communications equipment and devices, is part of a structured cabling system to support the provision of buildings in the hardware required for communication between. It consists of cables, fiber optic cable and into the Building Department, over-current over-voltage protection equipment and other related electrical hardware, commonly used medium is optical fiber. Compared with the traditional routing, integrated wiring construction as a modern information transmission system, its main advantages are: Traditional wiring specification due to lack of a unified, user must choose a variety of different application types of cables, connectors and wiring, resulting in duplication of cable laying waste, lack of flexibility and can not support the development needs of the user application re-wiring; integrated wiring system integration requirements of modern architecture transmission of voice, data, video and other information, using international standardized information interface and performance specifications, to support multi-vendor equipment and protocols to meet the rapid development of modern enterprise information application needs.Integrated wiring system, the user can according to actual needs or changing office environment, flexible and convenient way to achieve change and restructuring routes, adjusting the mode of building the network required to fully meet user business needs.Structured cabling system is the star topology wiring methods and standard interfaces, which greatly improves over all network reliability and manageability, significantly reduce system management and maintenance costs. The modular system design to provide a good system scalability and future-oriented application development support, fully guaranteed the user's investment in cabling, providing customers a long-term benefits.Cabling System can solve the traditional wiring methods exist many problems, provides long-term benefits of advanced and reliable solutions. With the rapid development of modern information technology, integrated wiring system will be indispensable to modern intelligent building infrastructure.综合布线系统现代科技的进步使计算机及网络技术飞速发展，提供越来越强大的计算机处理能力和网络通信能力。

法学毕业论文文献外文英文翻译

附件一：英文文献INTRODUCTIONOffences of strict liability are those crimes which do not require mens rea with regard to at least one or more elements of the actus reus. The defendant need not have intended or known about that circumstance or consequence. Liability is said to be strict with regard to that element. For a good example see:R v Prince[1875]：The defendant ran off with an under-age girl. He was charged with an offence of taking a girl under the age of 16 out of the possession of her parents contrary to s55 of the Offences Against the Person Act 1861. The defendant knew that the girl was in the custody her father but he believed on reasonable grounds that the girl was aged 18. It was held that knowledge that the girl was under the age of 16 was not required in order to establish the offence. It was sufficient to show that the defendant intended to take the girl out of the possession of her father.It is only in extreme and rare cases where no mens rea is required for liability, thereby making the particular offence "absolute".GENERAL PRINCIPLESThe vast majority of strict liability crimes are statutory offences. However, statutes do not state explicitly that a particular offence is one of strict liability. Where a statute uses terms such as "knowingly" or "recklessly" then the offence being created is one that requires mens rea. Alternatively, it may make it clear that an offence of strict liability is being created. In many cases it will be a matter for the courts to interpret the statute and decide whether mens rea is required or not. What factors are taken into account by the courts when assessing whether or not an offence falls into the category of strict liability offences?THE MODERN CRITERIAIn Gammon (Hong Kong) Ltd v Attorney-General for Hong Kong [1984], the Privy Council considered the scope and role of strict liability offences in the modern criminal law and their effect upon the "presumption of mens rea". Lord Scarman laid down the criteria upon which a court should decide whether or not it is appropriate to impose strict liability: "In their Lordships' opinion, the law … may be stated in the following propositions … : (1) there is a presumption of law that mens rea is required before a person can be held guilty of a criminal offence; (2) the presumption is particularly strong where the offence is "truly criminal" in character; (3) the presumption applies to statutory offences, and can be displaced only if this is clearly or by necessary implication the effect of the statute; (4) the only situation in which the presumption can be displaced is where the statute is concerned with an issue of social concern, and public safety is such an issue; (5) even where a statute is concerned with such an issue, the presumption of mens rea stands unless it can be shown that the creation of strict liability will be effective to promote the objects of the statute by encouraging greater vigilance to prevent the commission of the prohibited act."(1) PRESUMPTION OF MENS REACourts usually begin with the presumption in favor of mens rea, seeing the well-known statement by Wright J in Sherras v De Rutzen：There is a presumption that mens rea, or evil intention, or knowledge of the wrongfulness of the act, is an essential ingredient in every offence; but that presumption is liable to be displaced either by the words of the statute creating the offence or by the subject-matter with which it deals, and both must be considered(2) GRAVITY OF PUNISHMENTAs a general rule, the more serious the criminal offence created by statute, the less likely the courts is to view it as an offence of strict liability. See:Sweet v Parsley [1970]：The defendant was a landlady of a house let to tenants. She retained one room in the house for herself and visited occasionally to collect the rent and letters. While she was absent the police searched the house and found cannabis. The defendant was convicted under s5 of the Dangerous Drugs Act 1965, of "being concerned in the management of premises used for the smoking of cannabis". She appealed alleging that she had no knowledge of the circumstances and indeed could not expect reasonably to have had such knowledge.The House of Lords,quashing her conviction, held that it had to be proved that the defendant had intended the house to be used for drug-taking, since the statute in question created a serious, or "truly criminal" offence, conviction for which would have grave consequences for the defendant. Lord Reid stated that "a stigma still attaches to any person convicted of a truly criminal offence, and the more serious or more disgraceful the offence the greater the stigma". And equally important, "the press in this country are vigilant to expose injustice, and every manifestly unjust conviction made known to the public tends to injure the body politic [people of a nation] by undermining public confidence in the justice of the law and of its administration."Lord Reid went on to point out that in any event it was impractical to impose absolute liability for an offence of this nature, as those who were responsible for letting properties could not possibly be expected to know everything that their tenants were doing.(3) WORDING OF THE STATUTEIn determining whether the presumption in favor of mens rea is to be displaced, the courts are required to have reference to the whole statute in which the offence appears. See:Cundy v Le Cocq (1884) ：The defendant was convicted of unlawfully selling alcohol to an intoxicated person, contrary to s13 of the Licensing Act 1872. On appeal, the defendant contended that he had been unaware of the customer's drunkenness and thus should be acquitted. The Divisional Court interpreted s13 as creating an offence of strict liability since it was itself silent as to mens rea, whereas other offences under the same Act expressly required proof of knowledge on the part of the defendant. It was held that it was not necessary to consider whether the defendant knew, or had means of knowing, or could with ordinary care have detected that the person served was drunk. If he served a drink to a person who was in fact drunk, he was guilty. Stephen J stated: Here, as I have already pointed out, the object of this part of the Act is to prevent the sale of intoxicating liquor to drunken persons, and it is perfectly natural to carry that out by throwing on the publican the responsibility of determining whether the person supplied comes within that category.(4) ISSUES OF SOCIAL CONCERNSee :R v Blake (1996) :Investigation officers heard an unlicensed radio station broadcast and traced it to a flat where the defendant was discovered alone standing in front of the record decks, still playing music and wearing a set of headphones. Though the defendant admitted that he knewhe was using the equipment, he claimed that he believed he was making demonstration tapes and did not know he was transmitting. The defendant was convicted of using wireless telegraphy equipment without a license, contrary to s1 (1) Wireless Telegraphy Act 1949 and appealed on the basis that the offence required mens rea.The Court of Appeal held that the offence was an absolute (actually a strict) liability offence. The Court applied Lord Scarman's principles in Gammon and found that, though the presumption in favor of mens rea was strong because the offence carried a sentence of imprisonment and was, therefore, "truly criminal", yet the offence dealt with issues of serious social concern in the interests of public safety (namely, frequent unlicensed broadcasts on frequencies used by emergency services) and the imposition of strict liability encouraged greater vigilance in setting up careful checks to avoid committing the offence.(5) IS THERE ANY PURPOSE IN IMPOSING STRICT LIABILITY?The courts will be reluctant to construe a statute as imposing strict liability upon a defendant, where there is evidence to suggest that despite his having taken all reasonable steps, he cannot avoid the commission of an offence. See:Sherras v De Rutzen [1895]: The defendant was convicted of selling alcohol to a police officer whilst on duty, contrary to s16(2) of the Licensing Act 1872. He had reasonably believed the constable to be off duty as he had removed his arm-band, which was the acknowledged method of signifying off duty. The Divisional Court held that the conviction should be quashed, despite the absence from s16 (2) of any words requiring proof of mens rea as an element of the offence. Wright J expressed the view that the presumption in favor of mens rea would only be displaced by the wording of the statute itself, or its subject matter. In this case the latter factor was significant, in that no amount of reasonable care by the defendant would have prevented the offence from being committed. Wright J stated: "It is plain that if guilty knowledge is not necessary, no care on the part of the publican could save him from a conviction under section 16, subsection (2), since it would be as easy for the constable to deny that he was on duty when asked, or to produce a forged permission from his superior officer, as to remove his armlet before entering the public house. I am, therefore, of opinion that this conviction ought to be quashed."MODERN EXAMPLESThe following case is a modern example of the imposition of strict liability: Alphacell v Woodward [1972] The defendants were charged with causing polluted matter to enter a river contrary to s2 of the Rivers (Prevention of Pollution) Act 1951. The river had in fact been polluted because a pipe connected to the defendant's factory had been blocked, and the defendants had not been negligent. The House of Lords nevertheless held that the defendants were liable. Lord Salmon stated: If this appeal succeeded and it were held to be the law that no conviction be obtained under the 1951 Act unless the prosecution could discharge the often impossible onus of proving that the pollution was caused intentionally or negligently, a great deal of pollution would go unpunished and undeterred to the relief of many riparian factory owners. As a result, many rivers which are now filthy would become filthier still and many rivers which are now clean would lose their cleanliness. The legislature no doubt recognized that as a matter of public policy this would be most unfortunate. Hence s2(1)(a) which encourages riparian factory owners not only to take reasonable steps to prevent pollution but to do everything possible to ensure that they do not cause it.ARGUMENTS FOR STRICT LIABILITY1. The primary function of the courts is the prevention of forbidden acts. What acts should be regarded as forbidden? Surely only such acts as we can assert ought not to have been done. Some of the judges who upheld the conviction of Prince did so on the ground that men should be deterred from taking girls out of the possession of their parents, whatever the girl's age. This reasoning can hardly be applied to many modern offences of strict liability. We do not wish to deter people from driving cars, being concerned in the management of premises, financing hire purchase transactions or canning peas. These acts, if done with all proper care, are not such acts as the law should seek to prevent.2. Another argument that is frequently advanced in favor of strict liability is that, without it, many guilty people would escape - that there is neither time nor personnel available to litigate the culpability of each particular infraction. T his argument assumes that it is possible to deal with these cases without deciding whether D had mens rea or not, whether he was negligent or not. Certainly D may be convicted without deciding these questions, but how can he be sentenced? Suppose that a butcher sells some meat which is unfit for human consumption. Clearly the court will deal differently with (i) the butcher who knew that the meat was tainted; (ii) the butcher who did not know, but ought to have known; and (iii) the butcher who did not know and had no means of finding out. Sentence can hardly be imposed without deciding into which category the convicted person falls.3. The argument which is probably most frequently advanced by the courts for imposing strict liability is that it is necessary to do so in the interests of the public. Now it may be conceded that in many of the instances where strict liability has been imposed, the public does need protection against negligence and, assuming that the threat of punishment can make the potential harm doer more careful, there may be a valid ground for imposing liability for negligence as well as where there is mens rea. This is a plausible argument in favor of strict liability if there were no middle way between mens rea and strict liability - that is liability for negligence - and the judges have generally proceeded on the basis that there is no such middle way. Liability for negligence has rarely been spelled out of a statute except where, as in driving without due care, it is explicitly required. Lord Devlin has said: "It is not easy to find a way of construing a statute apparently expressed in terms of absolute liability so as to produce the requirement of negligence."ARGUMENTS AGAINST STRICT LIABILITY1. The case against strict liability, then, is, first, that it is unnecessary. It results in the conviction of persons who have behaved impeccably and who should not be required to alter their conduct in any way.2. Secondly, that it is unjust. Even if an absolute discharge can be given D may feel rightly aggrieved at having been formally convicted of an offence for which he bore no responsibility. Moreover, a conviction may have far-reaching consequences outside the courts, so that it is no answer to say that only a nominal penalty is imposed.3. The imposition of liability for negligence would in fact meet the arguments of most of those who favor strict liability. Such statutes are not meant to punish the vicious will but to put pressure upon the thoughtless and inefficient to do their whole duty in the interest of public health or safety or morals." The "thoughtless and inefficient" are, of course, the negligent. The objection tooffences of strict liability is not that these persons are penalized, but that others who are completely innocent are also liable to conviction. Though Lord Devlin was skeptical about the possibility of introducing the criterion of negligence (above), in Reynolds v Austin (1951) he stated that strict liability should only apply when there is something that the defendant can do to promote the observance of the law - which comes close to requiring negligence. If there were something which D could do to prevent the commission of the crime and which he failed to do, he might generally be said to have failed to comply with a duty - perhaps a high duty - of care; and so have been negligent.4. In Alphacell v Woodward (1972) Lord Salmon thought the relevant statutory section, "encourages riparian factory owners not only to take reasonable steps to prevent pollution but to do everything possible to ensure that they do not cause it." This suggests that, however vast the expenditure involved, and however unreasonable it may be in relation to the risk, D is under a duty to take all possible steps. Yet it may be doubted whether factory owners will in fact do more than is reasonable; and it is questionable whether they ought to be required to do so, at the risk - even though it be unlikely - of imprisonment. The contrary argument is that the existence of strict liability does induce organizations to aim at higher and higher standards.POSSIBLE DEVELOPMENTSThere are several possible compromises between mens rea and strict liability in regulatory offences. A "halfway house" has developed in Australia. The effect of Australian cases is: D might be convicted without proof of any mens rea by the Crown; but acquitted if he proved on a balance of probabilities that he lacked mens rea and was not negligent; ie, that he had an honest and reasonable belief in a state of facts which, would have made his act innocent. The onus of proving reasonable mistake is on D.STATUTORY DEFENCESIt is common for the drastic effect of a statute imposing strict liability to be mitigated by the provision of a statutory defense. It is instructive to consider one example. Various offences relating to the treatment and sale of food are enacted by the first twenty sections of the Food Safety Act 1990. Many, if not all, of these are strict liability offences. Section 21(1), however, provides that it shall be a defense for the person charged with any of the offences to prove that he took all reasonable precautions and exercised all due diligence to avoid the commission of the offence by himself or by a person under his control. Statutory defenses usually impose on the defendant a burden of proving that he had no mens rea and that he took all reasonable precautions and exercised all due diligence to avoid the commission of an offence. The effect of such provisions is that the prosecution need do no more than prove that the accused did the prohibited act and it is then for him to establish, if he can, that he did it innocently. Such provisions are a distinct advance on unmitigated strict liability.附件二：英文文献翻译介绍严格责任犯罪是关于客观方面的一个或多个因素不要求犯罪意图的那些犯罪。

英文文献小短文(原文加汉语翻译)

A fern that hyperaccumulates arsenic(这是题目，百度一下就能找到原文好，原文还有表格，我没有翻译)A hardy, versatile, fast-growing plant helps to remove arsenic from contaminated soilsContamination of soils with arsenic,which is both toxic and carcinogenic, is widespread1. We have discovered that the fern Pteris vittata (brake fern) is extremely efficient in extracting arsenic from soils and translocating it into its above-ground biomass. This plant —which, to our knowledge, is the first known arsenic hyperaccumulator as well as the first fern found to function as a hyperaccumulator— has many attributes that recommend it for use in the remediation of arsenic-contaminated soils.We found brake fern growing on a site in Central Florida contaminated with chromated copper arsenate (Fig. 1a). We analysed the fronds of plants growing at the site for total arsenic by graphite furnace atomic absorption spectroscopy. Of 14 plant species studied, only brake fern contained large amounts of arsenic (As;3,280–4,980 We collected additional samples of the plant and soil from the contaminated site –1,603 As) and from an uncontaminated site –As). Brake fern extracted arsenic efficiently from these soils into its fronds: plantsgrowing in the contaminated site contained 1,442–7,526 Arsenic and those from the uncontaminated site contained –These values are much higher than those typical for plants growing in normal soil, which contain less than of arsenic3.As well as being tolerant of soils containing as much as 1,500 arsenic, brake fern can take up large amounts of arsenic into its fronds in a short time (Table 1). Arsenic concentration in fern fronds growing in soil spiked with 1,500 Arsenic increased from to 15,861 in two weeks. Furthermore, in the same period, ferns growing in soil containing just 6 arsenic accumulated 755 Of arsenic in their fronds, a 126-fold enrichment. Arsenic concentrations in brake fernroots were less than 303 whereas those in the fronds reached 7,234 of 100 Arsenic significantly stimulated fern growth, resulting in a 40% increase in biomass compared with the control (data not shown).After 20 weeks of growth, the plant was extracted using a solution of 1:1 methanol:water to speciate arsenic with high-performance liquid chromatography–inductively coupled plasma mass spectrometry. Almost all arsenic was present as relatively toxic inorganic forms, with little detectable organoarsenic species4. The concentration of As(III) was greater in the fronds (47–80%) than in the roots %), indicating that As(V)was converted to As(III) during translocation from roots to fronds.As well as removing arsenic from soils containing different concentrations of arsenic (Table 1), brake fern also removed arsenic from soils containing different arsenic species (Fig. 1c). Again, up to 93% of the arsenic was concentrated in the fronds. Although both FeAsO4 and AlAsO4 are relatively insoluble in soils1, brake fern hyperaccumulated arsenic derived from these compounds into its fronds (136–315 levels 3–6 times greater than soil arsenic.Brake fern is mesophytic and is widely cultivated and naturalized in many areas with a mild climate. In the United States, it grows in the southeast and in southern California5. The fern is versatile and hardy, and prefers sunny (unusual for a fern) and alkaline environments (where arsenic is more available). It has considerable biomass, and is fast growing, easy to propagate,and perennial.We believe this is the first report of significant arsenic hyperaccumulation by an unmanipulated plant. Brake fern has great potential to remediate arsenic-contaminated soils cheaply and could also aid studies of arsenic uptake, translocation, speciation, distribution anddetoxification in plants.*Soil and Water Science Department, University ofFlorida, Gainesville, Florida 32611-0290, USAe-mail†Cooperative Extension Service, University ofGeorgia, Terrell County, PO Box 271, Dawson,Georgia 31742, USA‡Department of Chemistry & SoutheastEnvironmental Research Center, FloridaInternational University, Miami, Florida 33199,1. Nriagu, J. O. (ed.) Arsenic in the Environment Part 1: Cycling and Characterization (Wiley, New York, 1994).2. Brooks, R. R. (ed.) Plants that Hyperaccumulate Heavy Metals (Cambridge Univ. Press, 1998).3. Kabata-Pendias, A. & Pendias, H. in Trace Elements in Soils and Plants 203–209 (CRC, Boca Raton, 1991).4. Koch, I., Wang, L., Ollson, C. A., Cullen, W. R. & Reimer, K. J. Envir. Sci. Technol. 34, 22–26 (2000).5. Jones, D. L. Encyclopaedia of Ferns (Lothian, Melbourne, 1987).积累砷的蕨类植物耐寒，多功能，生长快速的植物，有助于从污染土壤去除砷有毒和致癌的土壤砷污染是非常广泛的。

英文文献翻译

Preparation and characterization of Ag-TiO2 hybrid clusters powders[1]（Ag-TiO2混合团簇粉末的制备和表征）Abstract：液相电弧放电法被用于制备纳米Ag-TiO2复合超细粉末。

XRD和TEM图表明颗粒呈葫芦状形态，分布狭窄。

我们讨论了实验条件对产品的影响，比较了这种方法制备的粉末和其他γ射线辐照法制备的粉末。

Introduction：材料合成技术，提高了研究特定电子和光学特性的能力。

这也导致了设备和不同效应的快速发展，如集成光学型偏振器[1]和量子霍耳效应。

所需的长度尺度对于这些结构的控制是在纳米级别的[ 2 ]。

科学家面临的一个新的挑战是半导体量子点的生长，它具有新的光学响应，引起了对其基础物理方面和三阶非线性光致发光的应用等的研究兴趣。

这方面的一个例子是Ag-TiO2复合材料通过胶体方法合成[ 3 ]或由γ射线辐照法合成[ 4 ]。

对比其他制备超细金属颗粒的方法，γ射线辐照法能在室温的环境压力下产生粉末。

在这封信中，我们开发了一种新的方法，即液相电弧放电法，用以制备纳米复合材料，当它经水热处理可以得到纳米级别的超细粉。

Preparation and photocatalytic activity of immobilized composite photocatalyst (titania nanoparticle/activated carbon)[2]固定化复合光催化剂（TiO2纳米颗粒/活性炭）的制备和光催化活性研究Abstract：制备了一种固定化复合光催化剂——TiO2纳米颗粒/活性炭（AC），并研究了它在降解纺织染料的光催化活性。

AC通过油菜籽壳制备。

碱性红18（BR18）和碱性红46（BR46）被用来作为模型染料。

并采用了傅里叶变换红外（FTIR），波长色散X射线光谱（WDX），扫描电子显微镜（SEM），紫外可见分光光度法，化学需氧量（COD）和离子色谱（IC）分析。

污水处理的英文文献翻译(1)

Nutrient removal in an A2O-MBR reactor with sludgereductionABSTRACTIn the present study, an advanced sewage treatment process has been developed by incorporating excess sludge reduction and phosphorous recovery in an A2O-MBR process. The A2O-MBR reactor was operated at a flux of 77 LMH over a period of 270 days. The designed flux was increased stepwise over a period of two weeks. The reactor was operated at two different MLSS range. Thermo chemical digestion of sludge was carried out at a fixed pH (11)and temperature (75℃) for 25% COD solubilisation. The released pbospborous was recovered by precipitation process and the organics was sent back to anoxic tank. The sludge digestion did not have any impact on COD and TP removal efficiency of the reactor. During the 270 days of reactor operation, the MBR maintained relatively constant transmembrane pressure. The results based on the study indicated that the proposed process configuration has potential to reduce the excess sludge production as well as it didn't detonated the treated water quality.Keywords: A2O reactor; MBR; Nutrient removal; TMP1. IntroductionExcess sludge reduction and nutrients removal are the two important problems associated with wastewater treatment plant. MBR process has been known as a process with relatively high decay rate and less sludge production due to much longer sludge age in the reactor (Wenet al., 2004). Sludge production in MBR is reduced by 28-68%, depending on the sludge age used (Xia et al.,2008). However, minimizing the sludge production by increasing sludge age is limited due to the potential adverse effect of high MLSS concentrations on membrane (Yoon et al., 2004). This problem can be solved by introducing sludge disintegration technique in MBR (Young et al., 2007). Sludge disintegration techniques have been reported to enhance the biodegradability of excess sludge (Vlyssides and Karlis, 2004). In overall, the basis for sludge reduction processes is effective combination of the methods for sludge disintegration and biodegradation of treated sludge. Advances in sludge disintegration techniques offer a few promising options including ultrasound (Guo et al., 2008), pulse power (Choi et al.,2006), ozone (Weemaes et al., 2000), thermal (Kim et al., 2003), alkaline (Li et al., 2008) acid (Kim et al., 2003) and thermo chemical(Vlyssides and Karlis, 2004). Among the various disintegration techniques, thermo chemical was reported to be simple and cost effective (Weemaes and Verstraete, 1998). In thermal-chemical hydrolysis, alkali sodium hydroxide was found to be the most effective agent in inducing cell lysis (Rocker et al., 1999). Conventionally, the nutrient removal was carried out in an A2O process. It has advantage of achieving, nutrient removal along with organic compound oxidation in a single sludge configuration using linked reactors in series (Tchobanoglous et al., 2003). The phosphoroes removal happens by subjecting phosphorous accumulating organisms (PAO) bacteria under aerobic and anaerobic conditions (Akin and Ugurlu, 2004). These operating procedures enhance predominance PAO, which are able to uptake phosphorous in excess. During the sludge pretreatment processes the bound phosphorous was solubilised and it increases the phosphorousconcentration in the effluent stream (Nishimura, 2001).So, it is necessary to remove the solubilised phosphorus before it enters into main stream. Besides, there is a growing demand for the sustainable phosphorous resources in the industrialized world. In many developed countries, researches are currently underway to recover the phosphoroes bound in the sludge's of enhanced biological phosphorus removal system (EBPR). The released phosphorous can be recovered in usable products using calcium salts precipitation method. Keeping this fact in mind, in the present study, a new advanced wastewater treatment process is developed by integrating three processes, which are: (a) thermo chemical pretreatment in MBR for excess sludge reduction (b) A2O process for biological nutrient removal (c) P recovery through calcium salt precipitation. The experimental data obtained were then used to evaluate the performance of this integrated system.2. Methods2.1. WastewaterThe synthetic domestic wastewater was used as the experimental influent. It was basically composed of a mixed carbon source, macro nutrients (N and P), an alkalinity control (NaHCO3) and a microelement solution. The composition contained (/L) 210 mg glucose, 200 mg NH4C1, 220 mg NaHCO3, 22一34 mg KH2PO4, microelement solution (0.19 mg MnCl2 4H20, 0.0018 mg ZnCl22H2O,0.022 mg CuCl22H2O, 5.6 mg MgSO47H2O, 0.88 mg FeCl36H2O,1.3 mg CaCl2·2H2O). The synthetic wastewater was prepared three times a week with concentrations of 210±1.5 mg/L chemical oxygen demand (COD), 40±1 mg/L total nitrogen (TN) and 5.5 mg/L total phosphorus (TP).2.2. A2O-MBRThe working volume of the A2O-MBR was 83.4 L. A baffle was placed inside the reactor to divide it into anaerobic (8.4 L) anoxic (25 L) and aerobic basin (50 L). The synthetic wastewater was feed into the reactor at a flow rate of 8.4 L/h (Q) using a feed pump. A liquid level sensor, planted in aerobic basin of A2O-MBR controlled the flow of influent. The HRT of anaerobic, anoxic and aerobic basins were 1, 3 and 6 h, respectively. In order to facilitate nutrient removal, the reactor was provided with two internal recycle (1R). IRl (Q= 1)connects anoxic and anaerobic and IR 2 (Q=3) was between aerobic and anoxic. Anaerobic and anoxic basins were provided with low speed mixer to keep the mixed liquid suspended solids (MLSS) in suspension. In the aerobic zone, diffusers were used to generate air bubbles for oxidation of organics and ammonia. Dissolved oxygen (DO) concentration in the aerobic basin was maintained at 3.5 mg/1 and was monitored continuously through online DO meter. The solid liquid separation happens inaerobic basin with the help of five flat sheet membranes having a pore size of 0.23 pm. The area of each membrane was 0.1 m2. They were connected together by a common tube. A peristaltic pumpwas connected in the common tube to generate suction pressure. In the common tube provision was made to accommodate pressure gauge to measure transmembrane pressure (TMP) during suction. The suction pump was operated in sequence of timing, which consists of 10 min switch on, and 2 min switch off.2.3. Thermo chemical digestion of sludgeMixed liquor from aerobic basin of MBR was withdrawn at the ratio of 1.5% of Q/day and subjected to thermo chemical digestion. Thermo chemical digestion was carried out at a fixed pH of 11(NaOH) and temperature of 75℃for 3 h. After thermo chemical digestion the supernatant and sludge were separated. The thermo-chemicallydigested sludge was amenable to further anaerobic bio-degradation (Vlyssides and Karlis, 2004), so it was sent to theanaerobic basin of the MBR2.4. Phosphorus recoveryLime was used as a precipitant to recover the phosphorous in the supernatant. After the recovery of precipitant the content was sent back to anoxic tank as a carbon source and alkalinity supelement for denitrification.2.5. Chemical analysisCOD, MLSS, TP, TN of the raw and treated wastewater were analyzed following methods detailed in (APHA, 2003). The influent and effluent ammonia concentration was measured using an ion-selective electrode (Thereto Orion, Model: 95一12). Nitrate in the sample was analyzed using cadmium reduction method (APHA, 2003).3. Results and discussionFig. 1 presents data of MLSS and yield observed during the operational period of the reactor. One of the advantages of MBR reactor was it can be operated in high MLSS concentration. The reactor was seeded with EBPR sludge from the Kiheung, sewage treatment plant, Korea. The reactor was startup with the MLSS concentration of 5700 mg/L. It starts to increase steadily with increase in period of reactor operation and reached a value of 8100 mg/L on day 38. From then onwards, MLSS concentration was maintained in the range of 7500 mg/L by withdrawing excess sludge produced and called run I. The observed yields (Yobs) for experiments without sludge digestion (run I) and with sludge digestion were calculated and given in Fig. 1. The Yobs for run I was found to be 0.12 gMLSS/g COD. It was comparatively lower than a value of 0.4 gMLSS/g CODreported for the conventional activated sludge processes (Tchoba-noglous et al., 2003). The difference in observed yield of these two systems is attributed to their working MLSS concentration. At high MLSS concentration the yield observed was found to be low (Visva-nathan et al., 2000). As a result of that MBR generated less sludge.The presently used MLSS ranges (7.5一10.5 g/L) are selected on the basis of the recommendation by Rosenberger et al. (2002). In their study, they reported that the general trend of MLSS increase on fouling in municipal applications seems to result in no impact at medium MLSS concentrations (7一12 g/L).It is evident from the data that the COD removal efficiency of A2O system remains unaffected before and after the introduction of sludge digestion practices. A test analysis showed that the differences between the period without sludge digestion (run I) and with sludge digestion (run II and III) are not statistically significant.However, it has been reported that, in wastewater treatment processes including disintegration-induced sludge degradation, the effluent water quality is slightly detonated due to the release of nondegradable substances such as soluble microbial products (Ya-sui and Shibata, 1994; Salcai et al., 1997; Yoon et al., 2004). During the study period, COD concentration in the aerobic basin of MBR was in the range of 18-38 mg/L and corresponding organic concentration in the effluent was varied from 4 to 12 mg/L. From this data it can be concluded that the membrane separation played an important role in providing the excellent and stable effluent quality.Phosphorus is the primary nutrient responsible for algal bloom and it is necessary to reduce the concentration of phosphorus in treated wastewater to prevent the algal bloom. Fortunately its growth can be inhibited at the levels of TP well below 1 mg/L (Mer-vat and Logan, 1996).Fig. 2 depicts TP removal efficiency of the A2O-MBR system during the period of study. It is clearly evident from the figure that the TP removal efficiency of A/O system was remains unaffected after the introduction of sludge reduction. In the present study, the solubilised phosphorous was recovered in the form of calcium phosphate before it enters into main stream. So, the possibility of phosphorus increase in the effluent due to sludge reduction practices has been eliminated. The influent TP concentration was in the range of 5.5 mg/L. During thefirst four weeks of operation the TP removal efficiency of the system was not efficient as the TP concentration in the effluent exceeds over 2.5 mg/L. The lower TP removal efficiency during the initial period was due to the slow growing nature of PAO organisms and other operational factors such as anaerobic condition and internal recycling. After the initial period, the TP removal efficiency in the effluent starts to increase with increase in period of operation. TP removal in A2O process is mainly through PAO organisms. These organisms are slow growing in nature and susceptible to various physicochemical factors (Carlos et al., 2008). During the study period TP removal efficiency of the system remains unaffected and was in the range of 74-82%.。

外文文献及翻译

（（英文参考文献及译文）二〇一六年六月本科毕业论文题目：STATISTICAL SAMPLING METHOD, USED INTHE AUDIT学生姓名：王雪琴学院：管理学院系别：会计系专业：财务管理班级：财管12-2班学校代码： 10128 学号： 201210707016Statistics and AuditRomanian Statistical Review nr. 5 / 2010STATISTICAL SAMPLING METHOD, USED IN THE AUDIT - views, recommendations, fi ndingsPhD Candidate Gabriela-Felicia UNGUREANUAbstractThe rapid increase in the size of U.S. companies from the earlytwentieth century created the need for audit procedures based on the selectionof a part of the total population audited to obtain reliable audit evidence, tocharacterize the entire population consists of account balances or classes oftransactions. Sampling is not used only in audit – is used in sampling surveys,market analysis and medical research in which someone wants to reach aconclusion about a large number of data by examining only a part of thesedata. The difference is the “population” from which the sample is selected, iethat set of data which is intended to draw a conclusion. Audit sampling appliesonly to certain types of audit procedures.Key words: sampling, sample risk, population, sampling unit, tests ofcontrols, substantive procedures.Statistical samplingCommittee statistical sampling of American Institute of CertifiedPublic Accountants of (AICPA) issued in 1962 a special report, titled“Statistical sampling and independent auditors’ which allowed the use ofstatistical sampling method, in accordance with Generally Accepted AuditingStandards (GAAS). During 1962-1974, the AICPA published a series of paperson statistical sampling, “Auditor’s Approach to Statistical Sampling”, foruse in continuing professional education of accountants. During 1962-1974,the AICPA published a series of papers on statistical sampling, “Auditor’sApproach to Statistical Sampling”, for use in continuing professional educationof accountants. In 1981, AICPA issued the professional standard, “AuditSampling”, which provides general guidelines for both sampling methods,statistical and non-statistical.Earlier audits included checks of all transactions in the period coveredby the audited financial statements. At that time, the literature has not givenparticular attention to this subject. Only in 1971, an audit procedures programprinted in the “Federal Reserve Bulletin (Federal Bulletin Stocks)” includedseveral references to sampling such as selecting the “few items” of inventory.Statistics and Audit The program was developed by a special committee, which later became the AICPA, that of Certified Public Accountants American Institute.In the first decades of last century, the auditors often applied sampling, but sample size was not in related to the efficiency of internal control of the entity. In 1955, American Institute of Accountants has published a study case of extending the audit sampling, summarizing audit program developed by certified public accountants, to show why sampling is necessary to extend the audit. The study was important because is one of the leading journal on sampling which recognize a relationship of dependency between detail and reliability testing of internal control.In 1964, the AICPA’s Auditing Standards Board has issued a report entitled “The relationship between statistical sampling and Generally Accepted Auditing Standards (GAAS)” which illustrated the relationship between the accuracy and reliability in sampling and provisions of GAAS.In 1978, the AICPA published the work of Donald M. Roberts,“Statistical Auditing”which explains the underlying theory of statistical sampling in auditing.In 1981, AICPA issued the professional standard, named “Audit Sampling”, which provides guidelines for both sampling methods, statistical and non-statistical.An auditor does not rely solely on the results of a single procedure to reach a conclusion on an account balance, class of transactions or operational effectiveness of the controls. Rather, the audit findings are based on combined evidence from several sources, as a consequence of a number of different audit procedures. When an auditor selects a sample of a population, his objective is to obtain a representative sample, ie sample whose characteristics are identical with the population’s characteristics. This means that selected items are identical with those remaining outside the sample.In practice, auditors do not know for sure if a sample is representative, even after completion the test, but they “may increase the probability that a sample is representative by accuracy of activities made related to design, sample selection and evaluation” [1]. Lack of specificity of the sample results may be given by observation errors and sampling errors. Risks to produce these errors can be controlled.Observation error (risk of observation) appears when the audit test did not identify existing deviations in the sample or using an inadequate audit technique or by negligence of the auditor.Sampling error (sampling risk) is an inherent characteristic of the survey, which results from the fact that they tested only a fraction of the total population. Sampling error occurs due to the fact that it is possible for Revista Română de Statistică nr. 5 / 2010Statistics and Auditthe auditor to reach a conclusion, based on a sample that is different from the conclusion which would be reached if the entire population would have been subject to audit procedures identical. Sampling risk can be reduced by adjusting the sample size, depending on the size and population characteristics and using an appropriate method of selection. Increasing sample size will reduce the risk of sampling; a sample of the all population will present a null risk of sampling.Audit Sampling is a method of testing for gather sufficient and appropriate audit evidence, for the purposes of audit. The auditor may decide to apply audit sampling on an account balance or class of transactions. Sampling audit includes audit procedures to less than 100% of the items within an account balance or class of transactions, so all the sample able to be selected. Auditor is required to determine appropriate ways of selecting items for testing. Audit sampling can be used as a statistical approach and a non- statistical.Statistical sampling is a method by which the sample is made so that each unit consists of the total population has an equal probability of being included in the sample, method of sample selection is random, allowed to assess the results based on probability theory and risk quantification of sampling. Choosing the appropriate population make that auditor’ findings can be extended to the entire population.Non-statistical sampling is a method of sampling, when the auditor uses professional judgment to select elements of a sample. Since the purpose of sampling is to draw conclusions about the entire population, the auditor should select a representative sample by choosing sample units which have characteristics typical of that population. Results will not extrapolate the entire population as the sample selected is representative.Audit tests can be applied on the all elements of the population, where is a small population or on an unrepresentative sample, where the auditor knows the particularities of the population to be tested and is able to identify a small number of items of interest to audit. If the sample has not similar characteristics for the elements of the entire population, the errors found in the tested sample can not extrapolate.Decision of statistical or non-statistical approach depends on the auditor’s professional judgment which seeking sufficient appropriate audits evidence on which to completion its findings about the audit opinion.As a statistical sampling method refer to the random selection that any possible combination of elements of the community is equally likely to enter the sample. Simple random sampling is used when stratification was not to audit. Using random selection involves using random numbers generated byRomanian Statistical Review nr. 5 / 2010Statistics and Audit a computer. After selecting a random starting point, the auditor found the first random number that falls within the test document numbers. Only when the approach has the characteristics of statistical sampling, statistical assessments of risk are valid sampling.In another variant of the sampling probability, namely the systematic selection (also called random mechanical) elements naturally succeed in office space or time; the auditor has a preliminary listing of the population and made the decision on sample size. “The auditor calculated a counting step, and selects the sample element method based on step size. Step counting is determined by dividing the volume of the community to sample the number of units desired. Advantages of systematic screening are its usability. In most cases, a systematic sample can be extracted quickly and method automatically arranges numbers in successive series.”[2].Selection by probability proportional to size - is a method which emphasizes those population units’recorded higher values. The sample is constituted so that the probability of selecting any given element of the population is equal to the recorded value of the item;Stratifi ed selection - is a method of emphasis of units with higher values and is registered in the stratification of the population in subpopulations. Stratification provides a complete picture of the auditor, when population (data table to be analyzed) is not homogeneous. In this case, the auditor stratifies a population by dividing them into distinct subpopulations, which have common characteristics, pre-defined. “The objective of stratification is to reduce the variability of elements in each layer and therefore allow a reduction in sample size without a proportionate increase in the risk of sampling.” [3] If population stratification is done properly, the amount of sample size to come layers will be less than the sample size that would be obtained at the same level of risk given sample with a sample extracted from the entire population. Audit results applied to a layer can be designed only on items that are part of that layer.I appreciated as useful some views on non-statistical sampling methods, which implies that guided the selection of the sample selecting each element according to certain criteria determined by the auditor. The method is subjective; because the auditor selects intentionally items containing set features him.The selection of the series is done by selecting multiple elements series (successive). Using sampling the series is recommended only if a reasonable number of sets used. Using just a few series there is a risk that the sample is not representative. This type of sampling can be used in addition to other samples, where there is a high probability of occurrence of errors. At the arbitrary selection, no items are selected preferably from the auditor, Revista Română de Statistică nr. 5 / 2010Statistics and Auditthat regardless of size or source or characteristics. Is not the recommended method, because is not objective.That sampling is based on the auditor’s professional judgment, which may decide which items can be part or not sampled. Because is not a statistical method, it can not calculate the standard error. Although the sample structure can be constructed to reproduce the population, there is no guarantee that the sample is representative. If omitted a feature that would be relevant in a particular situation, the sample is not representative.Sampling applies when the auditor plans to make conclusions about population, based on a selection. The auditor considers the audit program and determines audit procedures which may apply random research. Sampling is used by auditors an internal control systems testing, and substantive testing of operations. The general objectives of tests of control system and operations substantive tests are to verify the application of pre-defined control procedures, and to determine whether operations contain material errors.Control tests are intended to provide evidence of operational efficiency and controls design or operation of a control system to prevent or detect material misstatements in financial statements. Control tests are necessary if the auditor plans to assess control risk for assertions of management.Controls are generally expected to be similarly applied to all transactions covered by the records, regardless of transaction value. Therefore, if the auditor uses sampling, it is not advisable to select only high value transactions. Samples must be chosen so as to be representative population sample.An auditor must be aware that an entity may change a special control during the course of the audit. If the control is replaced by another, which is designed to achieve the same specific objective, the auditor must decide whether to design a sample of all transactions made during or just a sample of transactions controlled again. Appropriate decision depends on the overall objective of the audit test.Verification of internal control system of an entity is intended to provide guidance on the identification of relevant controls and design evaluation tests of controls.Other tests:In testing internal control system and testing operations, audit sample is used to estimate the proportion of elements of a population containing a characteristic or attribute analysis. This proportion is called the frequency of occurrence or percentage of deviation and is equal to the ratio of elements containing attribute specific and total number of population elements. WeightRomanian Statistical Review nr. 5 / 2010Statistics and Audit deviations in a sample are determined to calculate an estimate of the proportion of the total population deviations.Risk associated with sampling - refers to a sample selection which can not be representative of the population tested. In other words, the sample itself may contain material errors or deviations from the line. However, issuing a conclusion based on a sample may be different from the conclusion which would be reached if the entire population would be subject to audit.Types of risk associated with sampling:Controls are more effective than they actually are or that there are not significant errors when they exist - which means an inappropriate audit opinion. Controls are less effective than they actually are that there are significant errors when in fact they are not - this calls for additional activities to establish that initial conclusions were incorrect.Attributes testing - the auditor should be defining the characteristics to test and conditions for misconduct. Attributes testing will make when required objective statistical projections on various characteristics of the population. The auditor may decide to select items from a population based on its knowledge about the entity and its environment control based on risk analysis and the specific characteristics of the population to be tested.Population is the mass of data on which the auditor wishes to generalize the findings obtained on a sample. Population will be defined compliance audit objectives and will be complete and consistent, because results of the sample can be designed only for the population from which the sample was selected.Sampling unit - a unit of sampling may be, for example, an invoice, an entry or a line item. Each sample unit is an element of the population. The auditor will define the sampling unit based on its compliance with the objectives of audit tests.Sample size - to determine the sample size should be considered whether sampling risk is reduced to an acceptable minimum level. Sample size is affected by the risk associated with sampling that the auditor is willing to accept it. The risk that the auditor is willing to accept lower, the sample will be higher.Error - for detailed testing, the auditor should project monetary errors found in the sample population and should take into account the projected error on the specific objective of the audit and other audit areas. The auditor projects the total error on the population to get a broad perspective on the size of the error and comparing it with tolerable error.For detailed testing, tolerable error is tolerable and misrepresentations Revista Română de Statistică nr. 5 / 2010Statistics and Auditwill be a value less than or equal to materiality used by the auditor for the individual classes of transactions or balances audited. If a class of transactions or account balances has been divided into layers error is designed separately for each layer. Design errors and inconsistent errors for each stratum are then combined when considering the possible effect on the total classes of transactions and account balances.Evaluation of sample results - the auditor should evaluate the sample results to determine whether assessing relevant characteristics of the population is confirmed or needs to be revised.When testing controls, an unexpectedly high rate of sample error may lead to an increase in the risk assessment of significant misrepresentation unless it obtained additional audit evidence to support the initial assessment. For control tests, an error is a deviation from the performance of control procedures prescribed. The auditor should obtain evidence about the nature and extent of any significant changes in internal control system, including the staff establishment.If significant changes occur, the auditor should review the understanding of internal control environment and consider testing the controls changed. Alternatively, the auditor may consider performing substantive analytical procedures or tests of details covering the audit period.In some cases, the auditor might not need to wait until the end audit to form a conclusion about the effectiveness of operational control, to support the control risk assessment. In this case, the auditor might decide to modify the planned substantive tests accordingly.If testing details, an unexpectedly large amount of error in a sample may cause the auditor to believe that a class of transactions or account balances is given significantly wrong in the absence of additional audit evidence to show that there are not material misrepresentations.When the best estimate of error is very close to the tolerable error, the auditor recognizes the risk that another sample have different best estimate that could exceed the tolerable error.ConclusionsFollowing analysis of sampling methods conclude that all methods have advantages and disadvantages. But the auditor is important in choosing the sampling method is based on professional judgment and take into account the cost / benefit ratio. Thus, if a sampling method proves to be costly auditor should seek the most efficient method in view of the main and specific objectives of the audit.Romanian Statistical Review nr. 5 / 2010Statistics and Audit The auditor should evaluate the sample results to determine whether the preliminary assessment of relevant characteristics of the population must be confirmed or revised. If the evaluation sample results indicate that the relevant characteristics of the population needs assessment review, the auditor may: require management to investigate identified errors and likelihood of future errors and make necessary adjustments to change the nature, timing and extent of further procedures to take into account the effect on the audit report.Selective bibliography:[1] Law no. 672/2002 updated, on public internal audit[2] Arens, A şi Loebbecke J - Controve …Audit– An integrate approach”, 8th edition, Arc Publishing House[3] ISA 530 - Financial Audit 2008 - International Standards on Auditing, IRECSON Publishing House, 2009- Dictionary of macroeconomics, Ed C.H. Beck, Bucharest, 2008Revista Română de Statistică nr. 5 / 2010Statistics and Audit摘要美国公司的规模迅速增加，从第二十世纪初创造了必要的审计程序，根据选定的部分总人口的审计，以获得可靠的审计证据，以描述整个人口组成的帐户余额或类别的交易。

马铃薯去皮结构设计毕业课程设计外文文献翻译、中英文翻译

1 英文文献翻译1.1 英文文献原文题目Potatoes Potatoes peeled peeled peeled structure structure structure design designAbstract: Abstract: the the the graduation graduation graduation design design design is is is mainly mainly mainly studied studied studied on on on the the the bas bas is is of of of the the the principle principle principle of of of friction friction friction of of of potato potato potato peeling peeling peeling machine machine machine d d esign, esign, working working working principle principle principle and and and the the the composition composition composition of of of the the the equipment equipment . . Through Through Through the the the analysis analysis analysis of of of original original original data, data, data, project project project demonstratio demonstratio n n and and and related related related data data data analysis analysis analysis and and and calculation, calculation, calculation, the the the overall overall overall des des ign ign of of of a a a complete complete complete potato potato potato peeler peeler peeler to to to peel peel peel and and and mechanical mechanical mechanical stru stru cture cture is is is a a a new new new form, form, form, to to to better better better serve serve serve the the the fruits fruits fruits and and and vegeta vegeta bles bles to to to the the the development development development of of of leather leather leather industry, industry, industry, better better better adapt adapt adapt to to the the demand demand demand of of of the the the market market market both both both at at at home home home and and and abroad, abroad, abroad, so so so has has the the good good good market market market prospect. prospect.Keywords: Keywords: potatoes potatoes potatoes peeled peeled peeled structure; structure; structure; Friction Friction Friction ; ; ; drive drive 1 1 the the the domestic domestic domestic research research research status statusTechnology Technology is is is to to to measure measure measure whether whether whether an an an enterprise enterprise enterprise has has has the the the advan advan ced ced nature, nature, nature, whether whether whether have have have market market market competitiveness, competitiveness, competitiveness, whether whether whether can can keep keep ahead ahead ahead of of of competitors' competitors' competitors' important important important index. index. index. With With With the the the rapid rapid rapid d d evelopment evelopment of of of domestic domestic domestic potato potato potato peeling peeling peeling agency agency agency market, market, market, the the the core core of of the the the related related related production production production technology technology technology and and and research research research and and and devel devel opment opment will will will certainly certainly certainly has has has become become become the the the focus focus focus of of of the the the industry industry enterprises. enterprises. Understand Understand Understand the the the potato potato potato peeling peeling peeling machine machine machine in in in the the the pro pro duction duction of of of the the the core core core technology technology technology research research research and and and development development development at at at h h ome ome and and and abroad, abroad, abroad, process process process equipment, equipment, equipment, technology, technology, technology, application application application and and trend, trend, for for for an an an enterprise enterprise enterprise to to to improve improve improve product product product technical technical technical speci speci fication, fication, improve improve improve the the the market market market competitiveness competitiveness competitiveness is is is critical. critical. Potato Potato products products products the the the main main main varieties varieties varieties of of of potatoes, potatoes, potatoes, potato potato potato chips,chips, dehydrated dehydrated mashed mashed mashed potatoes, potatoes, potatoes, etc. etc. etc. No No No matter matter matter what what what kind kind kind of of of pr products, oducts, its its its processing processing processing technology technology technology requirements requirements requirements of of of raw raw raw material material s s to to to deal deal deal with with with the the the peel peel peel potatoes, potatoes, potatoes, to to to guarantee guarantee guarantee the the the quality quality of of the the the products, products, products, ensure ensure ensure its its its appearance, appearance, appearance, color color color and and and taste. taste. taste. P P eel eel potatoes potatoes potatoes peeled peeled peeled methods methods methods mainly mainly mainly include include include artificial, artificial, artificial, chemica chemica l l peeling, peeling, peeling, mechanical mechanical mechanical peeling, peeling, peeling, etc. etc. etc. Artificial Artificial Artificial to to to skin skin skin peelin peelin g g effect effect effect is is is better, better, better, but but but low low low efficiency, efficiency, efficiency, high high high loss loss loss rate, rate, rate, obv obv iously iously can can can not not not adapt adapt adapt to to to the the the needs needs needs of of of the the the development development development of of of th th e e potato potato potato industrialization; industrialization; industrialization; Chemical Chemical Chemical peeling peeling peeling a a a hot hot hot alkaline alkaline alkaline o o r r peel peel peel and and and low low low temperature temperature temperature liquid liquid liquid method method method in in in two two two forms, forms, forms, main main ly ly rely rely rely on on on the the the strong strong strong alkali alkali alkali solution solution solution and and and liquid liquid liquid chemical chemical chemical p p eeling eeling effect, effect, effect, softening softening softening and and and relaxation relaxation relaxation potato potato potato skins skins skins and and and body body -to -to keep, keep, keep, then then then use use use high high high pressure pressure pressure water water water jet, jet, jet, peeled. peeled. peeled. This This This me me thod thod the the the flushing flushing flushing process process process of of of before before before and and and after after after peeling peeling peeling the the the d d emand emand is is is higher, higher, higher, and and and liquid liquid liquid alkali, alkali, alkali, peel peel peel or or or consumption consumption consumption is is too too large, large, large, the the the cost cost cost is is is higher, higher, higher, and and and this this this way way way the the the serious serious serious in in fluence fluence the the the taste taste taste of of of the the the product. product. product. Mechanical Mechanical Mechanical peeling peeling peeling is is is fric fric tion tion peel peel peel form, form, form, the the the main main main dependence dependence dependence between between between potato potato potato and and and potat potat o o and and and potato potato potato with with with silicon silicon silicon carbide carbide carbide or or or rubber rubber rubber friction friction friction between between role role and and and achieve achieve achieve the the the goal goal goal of of of peel, peel, peel, good good good effect effect effect of of of this this this a a pproach pproach to to to skin, skin, skin, reduce reduce reduce the the the production production production cost, cost, cost, reduced reduced reduced environm environm entalpollution, pollution, simple simple simple operation, operation, operation, fast fast fast speed, speed, speed, can can can one one one person person person opera opera tion, tion, high high high energy energy energy efficiency efficiency efficiency to to to maximize maximize maximize the the the interests interests interests of of of th th e e products. products.2. 2. the the the working working working principle principle principle of of of the the the potato potato potato peeler peelerThe The potato potato potato peeling peeling peeling machine machine machine adopts adopts adopts horizontal horizontal horizontal machine, machine, machine, mainly mainly including including working working working cylinder, cylinder, cylinder, work work work table, table, table, frame frame frame and and and transmission transmission parts parts (see (see (see diagram). diagram). diagram). When When When to to to work work work in in in the the the potato potato potato peeling peeling peeling m m achine, achine, wheel wheel wheel rotation, rotation, rotation, the the the material material material by by by a a a bucket bucket bucket shape shape shape inlet inlet, , material material material fall fall fall on on on the the the surface surface surface of of of a a a rotating rotating rotating brush brush brush roller roller corrugated corrugated bulge, bulge, bulge, the the the effect effect effect of of of the the the centrifugal centrifugal centrifugal force force force by by by the the brush brush roller roller roller tangent tangent tangent upward upward upward movement, movement, movement, material material material constant constant constant alon alon g g the the the motion motion motion for for for a a a cylindrical cylindrical cylindrical wall, wall, wall, rise rise rise to to to the the the top, top, top, was was at at the the the top top top of of of the the the block block block back back back into into into the the the working working working surface surface surface of of the the plate. plate. plate. Into Into Into the the the rough rough rough surface surface surface and and and friction friction friction brush brush brush roll.roll. The The reciprocating reciprocating reciprocating movement movement movement of of of the the the material material material in in in this this this process,process, by by violent violent violent agitation, agitation, agitation, and and and formed formed formed with with with a a a brush brush brush roller, roller, roller, wall wall and and between between between particles particles particles is is is given given given priority priority priority to to to with with with flip, flip, flip, rubb rubb ing ing friction, friction, friction, impact impact impact of of of comprehensive comprehensive comprehensive mechanical mechanical mechanical effects, effects, effects, so so as as to to to achieve achieve achieve the the the aim aim aim of of of the the the skin. skin. skin. At At At the the the same same same time time time of of of f f riction riction peel, peel, peel, from from from inject inject inject water water water into into into the the the hole, hole, hole, in in in a a a timely timely manner manner will will will be be be wiped wiped wiped off off off the the the skin skin skin of of of the the the through through through brush brush brush b b rush rush roll roll roll and and and roll roll roll gap gap gap to to to discharge discharge discharge mouth mouth mouth eduction eduction eduction body. body. body. In In the the case case case of of of non-stop, non-stop, non-stop, open open open the the the discharge discharge discharge valve valve valve of of of mouth, mouth, material material by by by dial dial dial discharged discharged discharged through through through the the the discharge discharge discharge port. port. port. After After peeling peeling potatoes potatoes potatoes peel peel peel by by by institutions institutions institutions discharging discharging discharging chute chute chute into into the the auxiliary auxiliary auxiliary body, body, body, after after after screening screening screening and and and other other other auxiliary auxiliary auxiliary wor wor k k again again again into into into the the the next next next procedure. procedure.3. 3. summary summaryBelieve Believe in in in the the the near near near future, future, future, once once once the the the product product product is is is applied applied applied to to the the actual, actual, actual, will will will greatly greatly greatly save save save the the the working working working time, time, time, improve improve improve wo wo rk rk efficiency, efficiency, efficiency, improve improve improve the the the economic economic economic benefit, benefit, benefit, at at at the the the same same same tim tim e e will will will make make make a a a great great great contribution contribution contribution for for for the the the mass mass mass production, production, production, g g iving iving impetus impetus impetus to to to the the the development development development of of of potato potato potato industry industry industry better better better a a nd nd faster. faster. faster. Mechanical Mechanical Mechanical peeling, peeling, peeling, powered powered powered by by by motor, motor, motor, through through through the the pulley pulley drive drive drive cylinder cylinder cylinder at at at the the the bottom bottom bottom of of of the the the spinning spinning spinning l. Low Low middle, middle, middle, high high high edge edge edge mill mill mill wheel wheel wheel surface, surface, surface, undulate. undulate. undulate. Tubers Tubers to to join join join the the the cylinder, cylinder, cylinder, each each each other other other due due due to to to centrifugal centrifugal centrifugal force forceand and the the the friction friction friction effect, effect, effect, within within within the the the cylinder cylinder cylinder up, up, up, down, down, down, lef lef t, t, right right right turn, turn, turn, and and and constantly constantly constantly rolling; rolling; rolling; And And And the the the rubber rubber rubber cylind cylind er er lining, lining, lining, will will will rebound rebound rebound tuber, tuber, tuber, in in in the the the mill mill mill and and and the the the cylinder cylinder wall wall under under under the the the function function function of of of rubber rubber rubber potato potato potato tuber tuber tuber is is is grinding grinding to to the the the skin skin skin evenly, evenly, evenly, achieve achieve achieve the the the goal goal goal of of of potato potato potato peeling. peeling. peeling. T T o o skin skin skin with with with clear clear clear water, water, water, and and and then then then open open open the the the side side side door, door, door, tube tube r r discharge discharge discharge from from from a a a side side side door, door, door, dander dander dander with with with flow flow flow from from from the the the di di scharge scharge gap gap gap around around around the the the millstone. millstone. millstone. The The The machine machine machine for for for batch batch batch prod prod uction, uction, peeling peeling peeling machine, machine, machine, mill mill mill rotate rotate rotate at at at a a a certain certain certain speed, speed, speed, rol rol ler ler potato potato potato in in in under under under the the the action action action of of of centrifugal centrifugal centrifugal force, force, force, gravity gravity and and the the the friction, friction, friction, using using using potato potato potato work work work relative relative relative to to to the the the mill,mill, the the relative relative relative speed speed speed difference difference difference between between between the the the potato potato potato skin skin skin remov remov ed.1.2中文翻译马铃薯去皮结构设计马铃薯去皮结构设计摘要摘要::本次毕业设计主要研究了以摩擦原理为基础的马铃薯去皮机的设计要点、工作原理工作原理及设备的组成。

机械类外文文献翻译(中英文翻译)

机械类外文文献翻译(中英文翻译)英文原文Mechanical Design and Manufacturing ProcessesMechanical design is the application of science and technology to devise new or improved products for the purpose of satisfying human needs. It is a vast field of engineering technology which not only concerns itself with the original conception of the product in terms of its size, shape and construction details, but also considers the various factors involved in the manufacture, marketing and use of the product.People who perform the various functions of mechanical design are typically called designers, or design engineers. Mechanical design is basically a creative activity. However, in addition to being innovative, a design engineer must also have a solid background in the areas of mechanical drawing, kinematics, dynamics, materials engineering, strength of materials and manufacturing processes.As stated previously, the purpose of mechanical design is to produce a product which will serve a need for man. Inventions, discoveries and scientific knowledge by themselves do not necessarily benefit people; only if they are incorporated into a designed product will a benefit be derived. It should be recognized, therefore, that a human need must be identified before a particular product is designed.Mechanical design should be considered to be an opportunity to use innovative talents to envision a design of a product, to analyze the systemand then make sound judgments on how the product is to be manufactured. It is important to understand the fundamentals of engineering rather than memorize mere facts and equations. There are no facts or equations which alone can be used to provide all the correct decisions required to produce a good design.On the other hand, any calculations made must be done with the utmost care and precision. For example, if a decimal point is misplaced, an otherwise acceptable design may not function.Good designs require trying new ideas and being willing to take a certain amount of risk, knowing that if the new idea does not work the existing method can be reinstated. Thus a designer must have patience, since there is no assurance of success for the time and effort expended. Creating a completely new design generally requires that many old and well-established methods be thrust aside. This is not easy since many people cling to familiar ideas, techniques and attitudes. A design engineer should constantly search for ways to improve an existing product and must decide what old, proven concepts should be used and what new, untried ideas should be incorporated.New designs generally have "bugs" or unforeseen problems which must be worked out before the superior characteristics of the new designs can be enjoyed. Thus there is a chance for a superior product, but only at higher risk. It should be emphasized that, if a design does not warrant radical new methods, such methods should not be applied merely for the sake of change.During the beginning stages of design, creativity should be allowedto flourish without a great number of constraints. Even though many impractical ideas may arise, it is usually easy to eliminate them in the early stages of design before firm details are required by manufacturing. In this way, innovative ideas are not inhibited. Quite often, more than one design is developed, up to the point where they can be compared against each other. It is entirely possible that the design which is ultimately accepted will use ideas existing in one of the rejected designs that did not show as much overall promise.Psychologists frequently talk about trying to fit people to the machines they operate. It is essentially the responsibility of the design engineer to strive to fit machines to people. This is not an easy task, since there is really no average person for which certain operating dimensions and procedures are optimum.Another important point which should be recognized is that a design engineer must be able to communicate ideas to other people if they are to be incorporated. Communicating the design to others is the final, vital step in the design process. Undoubtedly many great designs, inventions, and creative works have been lost to mankind simply because the originators were unable or unwilling to explain their accomplishments to others. Presentation is a selling job. The engineer, when presenting a new solution to administrative, management, or supervisory persons, is attempting to sell or to prove to them that this solution is a better one. Unless this can be done successfully, the time and effort spent on obtaining the solution have been largely wasted.Basically, there are only three means of communication available tous. These are the written, the oral, and the graphical forms. Therefore the successful engineer will be technically competent and versatile in all three forms of communication. A technically competent person who lacks ability in any one of these forms is severely handicapped. If ability in all three forms is lacking, no one will ever know how competent that person is!The competent engineer should not be afraid of the possibility of not succeeding in a presentation. In fact, occasional failure should be expected because failure or criticism seems to accompany every really creative idea. There is a great deal to be learned from a failure, and the greatest gains are obtained by those willing to risk defeat. In the final analysis, the real failure would lie in deciding not to make the presentation at all. To communicate effectively, the following questions must be answered:(1) Does the design really serve a human need?(2) Will it be competitive with existing products of rival companies?(3) Is it economical to produce?(4) Can it be readily maintained?(5) Will it sell and make a profit?Only time will provide the true answers to the preceding questions, but the product should be designed, manufactured and marketed only with initial affirmative answers. The design engineer also must communicate the finalized design to manufacturing through the use of detail and assembly drawings.Quite often, a problem will occur during the manufacturing cycle [3].It may be that a change is required in the dimensioning or tolerancing of a part so that it can be more readily produced. This fails in the category of engineering changes which must be approved by the design engineer so that the product function will not be adversely affected. In other cases, a deficiency in the design may appear during assembly or testing just prior to shipping. These realities simply bear out the fact that design is a living process. There is always a better way to do it and the designer should constantly strive towards finding that better way.Designing starts with a need, real or imagined. Existing apparatus may need improvements in durability, efficiently, weight, speed, or cost. New apparatus may be needed to perform a function previously done by men, such as computation, assembly, or servicing. With the objective wholly or partly defined, the next step in design is the conception of mechanisms and their arrangements that will perform the needed functions.For this, freehand sketching is of great value, not only as a record of one's thoughts and as an aid in discussion with others, but particularly for communication with one's own mind, as a stimulant for creative ideas.When the general shape and a few dimensions of the several components become apparent, analysis can begin in earnest. The analysis will have as its objective satisfactory or superior performance, plus safety and durability with minimum weight, and a competitive east. Optimum proportions and dimensions will be sought for each critically loaded section, together with a balance between the strength of the several components. Materials and their treatment will be chosen. These important objectives can be attained only by analysis based upon the principles ofmechanics, such as those of statics for reaction forces and for the optimumutilization of friction; of dynamics for inertia, acceleration, and energy; of elasticity and strength of materials for stress。

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目录1.理论............................................... - 2 -2.实施............................................... - 3 -3. 范例.............................................. - 4 -4.变化和扩展......................................... - 6 -4.1 利用梯度方向，以减少参数...................... - 6 -4.2 Hough变换的内核............................... - 6 -4.3Hough曲线变换与广义Hough变换.................. - 6 -4.4 三维物体检测（平面和圆柱）.................... - 6 -4.5 基于加权特征.................................. - 7 -4.6 选取的参数空间................................ - 7 -4.6.1 算法实现一种高效椭圆检测................ - 8 -5.局限性............................................. - 8 -6. 参见.............................................. - 8 - 参考文献............................................. - 9 - 附件: ............................................... - 10 -Hough 变换Wikipedia 自由的百科全书霍夫变换是一个使用图像分析，计算机视觉和数字图像处理的特征提取技术。

[1]该技术的目的是要找到一个完美的程序，实现一个在一定阶级形状的对象实例。

这个实现过程添加了参数空间，从中获取最合适的对象作为程序一个所谓的累加器空间，明确的算法构造由Hough 变换计算。

经典的霍夫变换与鉴定图像中的行有关，但后来的Hough 变换识别一直延伸到任意形状和位置，最常见是圆形或椭圆形。

今天普遍使用霍夫变换的是由理查德杜达和彼得哈特于1972年发明的，当时把它叫做“广义Hough 变换”[2] 1962年后，霍夫相关专利保罗。

[3]巴拉德达纳阁下通过1981年的期刊文章，题为“推广了霍夫变换检测任意形状 ”实现了普及计算机视觉社区的转换。

1.理论在数字图像的自动分析中，往往会出现一个子检测简单形状，如直线，圆或椭圆形。

在多数情况下，一个边缘检测可作为前处理阶段获得的图像或图像的像素点，空间上的图像所需的曲线研究。

由于缺陷无论是在图像数据或是边缘检测器，都有可能会错过想要的曲线或像素点之间以及空间的理想路线偏差/圆/椭圆和嘈杂的优势，因为它们是从点边缘检测器所获得的。

由于这些原因，往往是不平凡的群组边缘特征提取到一个直线，圆或椭圆形适当选择。

霍夫变换的目的是为了解决使我们能够通过执行超过执行参数化的图像对象（夏皮罗和Stockman ，304）设置明确的表决程序边缘点分组到对象的候选人这一问题。

最简单的霍夫变换是线性变换检测直线。

在图像空间，直线可谓为y = mx+b 和点可绘制图形图像的每个双（x ，y ）。

在霍夫变换之中，主要的想法是考虑直线特色的形象并不像点),(,,x 2211y x y ）（等，但相反的情形是在其参数方面，即斜率参数m 和截距参数b 。

在此基础上，直线为y = mx + b 可以表示为空间，参数a 点为（B ，m ）。

但是，一个面临的问题是垂直线引起的参数m 和无界值。

为方便计算的原因，最好使用R 和 θ(8)对不同的参数，表示Hough 变换，对Hough 的线路研究。

参数R 代表路线和起点之间的距离，而θ为从原点到这个最近点的向量角度（见坐标）。

使用这个线性参数化方程的可写为[4]它可以重新放到 r = x cosθ + y sinθ （夏皮罗和Stockman ，304）。

因此，可以相关联想到，如果和 R r ∈ ，或和 0≥r ，图像每行的一对（r ，θ），都是独一无二的。

相关（r ，θ）平面有时被称为霍夫直线的两维空间。

这种表示使得Hough 变换概念上非常接近二维Radon 变换。

（它们可以被看作是同一事物会有不同的寻求途径类型。

[5] ）对于平面图像上的任意一点的坐标）（00,x y ，它的行是经过, ，其中 R （该线之间的距离和起点）取决于θ。

这相当于一个正弦曲线的相关（r ，θ）平面所特有的那一点。

如果曲线对应的两个点叠加，位置（在霍夫空间），他们对应的交叉线（在原始图像空间）指向穿过两个点。

更普遍的，一个点，在该行的参数交叉设置形成一条直线将产生正弦曲线。

因此，检测问题的共线点可以转换为发现问题的同时曲线。

[6]2.实施霍夫变换算法使用一个数组，称为累加器，及时发现存在的直线y =mx+b 。

该部分的总和等于问题编号Hough 变换的未知参数。

例如，线性Hough 变换问题有两个未知参数：m 和b 。

累加器的数组的二维将对应于m 和量化值b 。

对于每个像素及其邻近地区，霍夫变换算法确定是否有在该像素的边缘足够的迹象。

如果是的话，它会计算该行的参数，然后寻找累加器的组，参数落入，增加了该组价值。

通过寻找具有最高值的组通常由累加器在空间的局部极大值看，最有可能的行可以被提取，和他们（近似）几何定义中读出。

（夏皮罗和Stockman，304），找到这些峰值简单的方法是采用某种形式阈值，但不同的技术在不同情况下可能会产生更好的结果- 确定哪些行被发现，以及有多少。

由于返回不包含任何长度信息的行，它往往是未来需要找到哪部分图像与该行向上匹配。

此外，由于在边缘检测步骤不完善的误差，这些误差通常将在累加器空间，这可能使找到适当的峰值很困难，因此，适当的行是错误的。

3. 范例考虑三个数据点，这里显示为黑点。

▪对于每个数据点，行数将通过它绘制，它们都在不同的角度。

这些都在这里显示为实线。

▪对于每一条实线绘制的线是它和它垂直相交原点。

这些都显示为虚线。

▪长度（即垂直距离原点）和每个虚线的角度进行了测量。

结果显示在上图表中。

▪这是每个数据点的重复。

▪先作为一个对于霍夫空间图已知的的夹角线长度图，然后创建。

该曲线的交叉点给出了一个距离和角度。

这个距离和角度说明线交叉点正在测试中。

图所示的紫色线相交点，这对应于图表在紫线线以上，它都符合这三点。

下面是一个不同的例子，显示了霍夫变换的结果在一个包含两个粗线光栅图像。

此变换的结果存储在一个矩阵之中。

单元格的值代表了曲线经过任意点的数目。

值较高的象元呈现明亮。

这两个明显的亮点是两个线的霍夫参数。

从这些点的位置角度和输入图像中的两条现的中心距离来确定。

4.变化和扩展4.1 利用梯度方向，以减少参数一种改进的由奥戈曼和克劳夫斯所提出的可以用来检测线方法，如果考虑到图像亮度梯度必然是局部的边缘采用的正交边缘。

由于一般涉及边缘的强度计算梯度幅值检测，梯度方向是经常发现有缺陷的。

如果给定点的坐标（x，y）确定上一条线，那么可以立即获得局部的梯度方向给出的相应的参数θ表示路线和R参数。

（夏皮罗和Stockman，305）的梯度方向可以预计在20°，从而缩短了从完整正弦波180°追踪到大约45°。

这减少了计算时间，并减少无用的参数，从而提高了峰值对应于图像实线可视性的效果。

4.2 Hough变换的内核费尔南德斯和奥利维拉[7]提出一个改进的Hough变换参数机制，允许软件执行来实现的，1280 × 960）的实时性能，即使在相对较大的图像。

例如：内核基于Hough变换使用同样的哈特和杜达提出的相关（r，θ）参数，但像素群可能共线运行。

对于每个集群，参数是转换一个定向使用椭圆高斯内核模型的不确定性方面与相应的群集最佳拟合直线相关。

该方法不仅大大提高了选取方案的性能，而且还产生了更简洁的累加器，使产生更强大的线检测。

4.3Hough曲线变换与广义Hough变换虽然上述转换的版本只适用于直线发现，类似的变换可以用来找出任何可以由一系列参数所代表的形状。

一个圆圈，例如：可以转化成三参数集合，分别代表该中心和半径，从而使霍夫空间变成三维。

任意椭圆和曲线也可以发现这种方式，因为可以轻松地为任何形状的一组参数来表示。

对于更复杂的形状，广义Hough变换使用，它允许一个功能选取特定的位置，方向或使用预定义的查询表形缩放。

4.4 三维物体检测（平面和圆柱）Hough变换，也可以用于三维物体范围内的数据或三维云点检测。

扩展了经典的霍夫变换的平面检测，使之十分方便。

一架飞机的代表，其显式方程是z = a x * x + a y * y + d ，我们可以使用3D Hough空间对应X， Y和 D。

这个扩展的部分，即从反患有相同的问题，因为它的二维，近水平飞机能够可靠地检测，而性能变差成为平面垂直方向（数据大值的X 和Y在放大的噪声）。

这架飞机已用于制订的飞机在从机载激光扫描获得的点云[8]检测和工程，因为在该域中的所有飞机水平非常好。

广义平面用霍夫变换检测，飞机可以通过正常的参数化的向量 n（使用球面坐标）和其原产地距离ρ空间造成了三维霍夫。

表面上的正弦结果输入数据中的每个选取点在霍夫空间上。

这些正弦曲面交线指示飞机的存在。

[9]Hough变换也被用来查找圆柱云点对象，用的是两个步骤的方法。

第一步，找到圆柱。

第二步，找到圆柱的位置和导向半径。

[10]4.5 基于加权特征一个常见的细节变化。

也就是说，在今后，发现同在一个阶段的最大点算值可用于限制搜索范围的值。

4.6 选取的参数空间霍夫变换为高维参数空间不仅是缓慢的，而且如果没有远见，可以很容易地实现可用内存溢出。

即使编程环境允许一个阵列，通过虚拟内存比可用内存空间较大的分配，这需要的数页交换将是非常苛刻的，因为累加器数组是随机访问的使用方式，很少在连续内存停止，因为它跳过项目的索引编制索引。

考虑寻找一个800 * 600椭圆图像任务。

假设半径的沿椭圆主轴导向，参数空间是四维的。

（x，y）定义为椭圆的中心，A和B分别表示两个半径。

允许该中心将在图像的任何地方，加约束0<x<800和0<y<600。

如果给予半径作为约束条件，而剩下的就是一个值超过2300亿累加器的稀疏填充矩阵的相同值。

利用Matlab着眼专门为稀疏矩阵的功能，但它们只能处理二维矩阵，而不是四维的。

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