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超声波加工中英文对照外文翻译文献

超声波加工中英文对照外文翻译文献

超声波加工中英文对照外文翻译文献超声波加工中英文对照外文翻译文献(文档含英文原文和中文翻译)超声波加工综述摘要超声波加工适合切削不导电、脆性材料,例如工程陶瓷。

与其他非传统加工,如激光束、电火花加工等不同,超声波加工不会导致工件表面热损伤或显著的残余应力,这对脆性材料尤其重要。

超声波加工的基本原理,包括材料去除原理,各类操作参数对材料切除率、刀具磨损、工件精确度要求都有叙述,并着重表述了在加工工程陶瓷上的应用,制造复杂的三维立体陶瓷的问题也在叙述当中。

1 概述超声波加工及其应用超声波加工是一种非传统机械切削技术,通常与低材料去除率有关,它并不被加工材料的导电率和化学特性所限制,它用于加工金属和非金属材料,非常适合于脆性大,硬度高于40HRC[6–12]的材料,比如无机玻璃、硅片、镍、钛合金等等 [13–24],有了它,76um 的小孔也能加工,但是被加工的孔深度与直径之比限制在 3 比 1 之内 [8, 12]。

超声波加工的历史可以追溯到 1927 年,R. W. Wood 和 A. L. Loomis 发表的论文,1945年。

有关于超声波的第一项专利给了 L. Balamuth,现在超声波加工已经分化很多领域,超声波钻削、超声波切削、超声波尺寸加工、超声波研磨技术和悬浮液钻孔法,然而,在 20世纪 50 年代初只普遍知道超声波冲磨或 USM[8,25, 28, 30, 31]。

在超声波加工中,高频率的电能通过换能器/增幅器被转变为机械振动,之后通过一个能量集中装置被传送出去, 例如变幅杆/刀具组件[1, 17, 18, 30, 32]。

这导致刀具沿着其纵向轴线以振幅 0-50μm 高频率振动(通常≥20KHz)[16, 33, 34],典型额定功率范围从50~3000W[35]不等,在某些机器上可以达到 4kw。

一个受控静负载被施加于刀具和磨料悬浮液(由研磨材料的混合物组成、例如碳化硅,碳化硼等等,悬浮在水或油中)被泵传送到切削区域,刀具的振动导致磨料颗粒悬浮在刀具和工件表面间,通过微型片冲击工件表面从而去除材料[19]。

外文翻译(英文)

外文翻译(英文)

外文文献Gold refining technology introductionGold ore in the content is extremely low, in order to extract gold, need to will be broken and fine grinding ore and adopt。

With the mineral processing or enrichment from ore in advance that gold is isolated. Gold ore dressing is used in moreRe-election and flotation, re-election method in ShaJin production in an important position, flotation method is rock gold mine。

Widely use of mineral processing mountain, at present our country about 80% of the rock gold mines use this law to choose gold, choose。

Ore technology and equipment level is distinctly improved.(A) Broken and grindingAccording to the survey, our country choose gold in the jaw crusher for crushing, using standard cone broken. Ore machine broken, and finely used the short head type tapered roller machine and broken mine to break mine machine. Medium and small choose.Gold factory is used mostly for two broken a closed-circuit ore, large choose the three sections of a gold factory closed-circuit broken mine process. In order to improve the dressing production ability, mining equipment potential, broken mine to process, the reform.Grinding machine utilization coefficient increase, the major measures taken the little mill is broken, reduce ore into the ground particle size.(B) Re-electionRe-election in rock gold mine apply more extensive, and more as aided process, in the grinding loop of the recovery. Coarse grain of gold, for flotation and cyanide process to create favorable conditions, improve concentration index, improve the total return to gold. The yield, to increase production and reduce the cost is playing a positive role. Shandong province about more than 10 pick. Gold factory used heavy choose this one process, the average total recovery can be increased 2% ~ 3%, the enterprise economic effectGood profit, according to not complete count, may have millions of dollars a year of the profits. Henan, hunan, Inner Mongolia, etc. Provinces (areas) also have good effect, the main equipment is chute, wave bed, jig and short cone. Vortex machines etc. From our mostgold mine to see, float-heavy joint process (flotation tailings used heavy Choose) suitable for.(C) FlotationAccording to the survey, 80% of rock in the gold mines flotation method selected gold, the output of the concentrate more. Sent to non-ferrous smelter processing. Because of leaching gold cyanide process of development and enterprise to improve economic efficiency. Good, reduce concentrate transportation loss, in recent years the product structure has experienced a greater change, take more local processing (of course also because of mineral smelting and the contradiction between the problems and valuation, forcing the mine in situ to place Richard) prompted the flotation process have larger development, in the gold production occupies an important position in the. Usually Priority of flotation and mixing floatation two craft. In recent years in the process modification and potions add system .With new progress, flotation recoveries also increased significantly. More than 40 selected according to the national gold factory, flotation work.(D) The choose-leaching gold technology sector1. Mix mercury law of leaching goldMix mercury method of leaching gold process is a kind of old mention gold process, easy, and economic, and is suitable for coarse grains. Monomer recovery of gold. Our country many gold mine still follow the method. Along with the development of the gold production and the progress of science and technology, mix mercury law of leaching gold process is also constantly have improved and perfected. Due to the environment.The increasingly strict requirements, some mining cancelled mix mercury assignments, as heavy choose, the flotation and cyanide process of leaching gold.process replaced. In the gold production, mixed mercury method of leaching gold technology still has its important role in the domestic and foreign are should be with a practical example. At present in zhangjiakou, hebei province, liaoning erdaogou, jilin jiapigou, shandong etc many gold incorporated. Mine the process application. Liaoning erdaogou gold mine was a single flotation process, according to the ore properties instead.2. Of leaching gold cyanide process technologyCyanide process technology of leaching gold from oreconcentrate is modern or extraction of the main method of gold. Cyanide process mention.Gold technologies include: by roasting-cyanide leaching process, leaching of pulp washing filtering, kau liquid or are the cicc pulp.The extraction and the finished product and so on several basic processes of smelting. China's gold mines are the two basic existing factory. Kind of leaching gold process, one kind is dense continuous against washing machine, with zinc powder replacement precipitation back. The gold of so-called ordinary cyanide process of leaching gold process (CCD method and CCF law), the other is without filter washing, the active carbon adsorption in the pulp are directly from the recovery of gold without filter are carbon plasma process (CIP method and CIL law).Ordinary cyanide process of leaching gold process according to the different materials handled and two .(E) Heap leaching process for productionGold resources in China, low grade oxidation of ore has certain proportion, deal with this kind of ore.The routine of leaching gold cyanide process technology not economically viable, and the production process heap leaching, there are economic effect. The victims. Further expand the production scale heap leaching, is increase China's gold production of one of the path.20. At the end of the 70 s, China began to low grade contain gold ore heap leaching oxidation of the production process research, liaoning dandong hushan gold small-scale production trials are successful, successively in henan spirit lake, silver Hole slope, yunnan MoJiang, hebei worship ritual, Inner Mongolia and some of the mine in chifeng application, take more satisfactory economic effect, low grade for the gold ore containing the oxidation of the development and utilization of the opened up.。

外文翻译指导记录怎么写

外文翻译指导记录怎么写

外文翻译指导记录怎么写外文翻译指导记录怎么写外文翻译、开题报告要求一套完整的毕业设计(论文)材料由外文翻译、开题报告和毕业设计(论文)正文三部分组成,按照统一的封面和格式编写。

和字体大小将按照学院的规定。

文本格式和书写要求(一)外文翻译通过文献综述和翻译,进一步提高外语运用能力,熟悉本专业几大外文书刊,了解国内外毕业设计(论文)信息和动态。

1、格式:(1)外文(译文前面附被翻译的外文原件复印件);(2)翻译成中文格式:①标题②署名(作者名)** 著译者:***③翻译正文④外文著录为了反映文稿的科学依据和译者尊重他人研究成果的严肃态度以及向读者提出有关信息的出处,要求译者按著录/题名/出版事项顺序排列注明:期刊——著者,题名,期刊名称,出版年,卷号(期号),起始页码。

书籍——著者,书名、版次(第一版不标注),出版地,出版者,出版年,起始页码。

2、内容要求:(1)阅读每位学生在文献查阅环节中,必须阅读5~10万个印刷符号的外语文献资料(最好阅读与课题或本专业有联系的内容),择其重要的翻译1~2万个印刷符号(约3000汉字)。

(2)翻译①标题应真实地反映出翻译外文的主体内容或原外文标题内容,一般控制在20个汉字以内。

可以用副标题对标题予以补充说明;②标题下方正中为外文作者署名;③外文翻译成中文的内容;④外文著录(二)开题报告1、格式:(1)课题名称;(2)学生、专业、指导教师和教学单位署名;(3)开题报告的正文撰写。

2、内容要求:(1)课题名称要求与毕业设计(论文)正文标题名称一致(一般控制在20个汉字以内,可以用副标题对标题予以补充说明)。

(2)学生、指导教师和教学单位署名:题目下方中间是学生签名,学生签名下方是专业名称,专业名称下方是指导老师签名,指导老师签名下方是教学单位签名(教学单位指学院)。

(3)开题报告的正文撰写要求包括(不少于2500字):①课题来源②研究目的和意义③研究的内容与途径④国内外研究现状与发展趋势通过提问和分析问题,综合前人文献提出的理论和事实,比较各种学术观点,明确所提问题的历史、现状和发展方向。

机械专业毕业设计外文翻译10

机械专业毕业设计外文翻译10

翻译部分英文部分ADV ANCED MACHINING PROCESSESAs the hardware of an advanced technology becomes more complex, new and visionary approaches to the processing of materials into useful products come into common use. This has been the trend in machining processes in recent years.. Advanced methods of machine control as well as completely different methods of shaping materials have permitted the mechanical designer to proceed in directions that would have been totally impossible only a few years ago.Parallel development in other technologies such as electronics and computers have made available to the machine tool designer methods and processes that can permit a machine tool to far exceed the capabilities of the most experienced machinist.In this section we will look at CNC machining using chip-making cutting tools. CNC controllers are used to drive and control a great variety of machines and mechanisms, Some examples would be routers in wood working; lasers, plasma-arc, flame cutting, and waterjets for cutting of steel plate; and controlling of robots in manufacturing and assembly. This section is only an overview and cannot take the place of a programming manual for a specific machine tool. Because of the tremendous growth in numbers and capability of comp uters ,changes in machine controls are rapidly and constantly taking place. The exciting part of this evolution in machine controls is that programming becomeseasier with each new advanced in this technology.Advantages of Numerical ControlA manually operated machine tool may have the same physical characteristics as a CNC machine, such as size and horsepower. The principles of metal removal are the same. The big gain comes from the computer controlling the machining axes movements. CNC-controlled machine tools can be as simple as a 2-axis drilling machining center (Figure O-1). With a dual spindle machining center, the low RPM, high horsepower spindle gives high metal removal rates. The high RPM spindle allows the efficient use of high cutting speed tools such as diamonds and small diameter cutters (Figure O-2). The cutting tools that remove materials are standard tools such as milling cutters, drills, boring tools, or lathe tools depending on the type of machine used. Cutting speeds and feeds need to be correct as in any other machining operation. The greatest advantage in CNC machining comes from the unerring and rapid positioning movements possible. A CNC machine does dot stop at the end of a cut to plan its next move; it does not get fatigued; it is capable of uninterrupted machining error free, hour after hour. A machine tool is productive only while it is making chips.Since the chip-making process is controlled by the proper feeds and speeds, time savings can be achieved by faster rapid feed rates. Rapid feeds have increased from 60 to 200 to 400 and are now often approaching 1000 inches per minute (IPM). These high feed rates can pose a safety hazard to anyone within the working envelope of the machine tool.Complex contoured shapes were extremely difficult to product prior to CNC machining .CNC has made the machining of these shapes economically feasible. Design changes on a part are relatively easy to make by changing the program that directs the machine tool.A CNC machine produces parts with high dimensional accuracy and close tolerances without taking extra time or special precautions, CNC machines generally need less complex work-holding fixtures, which saves time by getting the parts machined sooner. Once a program is ready and production parts, each part will take exactly the same amount of time as the previous one. This repeatability allows for a very precise control of production costs. Another advantage of CNC machining is the elimination of large inventories; parts can be machined as needs .In conventional production often a great number of parts must be made at the same time to be cost effective. With CNC even one piece can be machined economically .In many instances, a CNC machine can perform in one setup the same operations that would require several conventional machines.With modern CNC machine tools a trained machinist can program and product even a single part economically .CNC machine tools are used in small and large machining facilities and range in size from tabletop models to huge machining centers. In a facility with many CNC tools, programming is usually done by CNC programmers away from the CNC tools. The machine control unit (MCU) on the machine is then used mostly for small program changes or corrections. Manufacturing with CNC tools usually requires three categories of persons. The first is the programmer, who is responsible for developing machine-ready code. The next person involved is the setup person, who loads the raw stork into the MCU, checks that the co rrect tools are loaded, and makes the first part. The third person is the machine and unloads the finished parts. In a small company, one person is expected to perform all three of these tasks.CNC controls are generally divided into two basic categories. One uses a ward address format with coded inputs such as G and M codes. The other users a conversational input; conversational input is also called user-friendly or prompted input. Later in this section examples of each of these programming formats in machining applications will be describes.CAM and CNCCAM systems have changed the job of the CNC programmer from one manually producing CNC code to one maximizing the output of CNC machines. Since CNC machine tools are made by a great number of manufacturers, many different CNC control units are in use. Control units from different manufacturers use a variety of program formats and codes. Many CNC code words are identical for different controllers, but a great number vary from one to another.To produce an identical part on CNC machine tools with different controllers such as one by FANCU, OKUMA or DYNAPATH, would require completely different CNC codes. Each manufacturer is constantly improving and updating its CNC controllers. These improvements often include additional code words plus changes in how the existing code works.A CAM systems allows the CNC programmer to concentrate on the creation of an efficient machining process, rather then relearning changed code formats. A CNC programmer looks atthe print of a part and then plans the sequence of machining operations necessary to make it (Figure O-3). This plan includes everything, from the selection of possible CNC machine tools, to which tooling to use, to how the part is held while machining takes place. The CNC programmer has to have a thorough understanding of all the capacities and limitations of the CNC machine tools that a program is to be made for. Machine specifications such as horsepower, maximum spindle speeds, workpiece weight and size limitations, and tool changer capacity are just some of the considerations that affect programming.Another area of major importance to the programmer is the knowledge of machining processes. An example would be the selection of the surface finish requirement specified in the part print. The sequence of machining processes is critical to obtain acceptable results. Cutting tool limitations have to be considered and this requires knowledge of cutting tool materials, tool types, and application recommendations.A good programmer will spend a considerable amount of time in researching the rapidly growing volume of new and improved tools and tool materials. Often the tool that was on the cutting edge of technology just two years ago is now obsolete. Information on new tools can come from catalogs or tool manufacturers' tooling engineers. Help in tool selection or optimum tool working conditions can also be obtained from tool manufacturer software. Examples would be Kennametal's "TOOLPRO", software designed to help select the best tool grade, speed, and feed rates for different work materials in turning application. Another very important feature of "TOOLPRO" is the display of the horsepower requirement for each machining selection. This allow the programmer to select a combination of cutting speed, feed rate, and depth of cut that equals the machine's maximum horsepower for roughing cuts. For a finishing cut, the smallest diameter of the part being machined is selected and then the cutting speed varied until the RPM is equal to the maximum RPM of the machine. This helps in maximizing machining efficiency. Knowing the horsepower requirement for a cut is critical if more than one tool is cutting at the same time.Software for a machining center application would be Ingersoll Tool Company's "Actual Chip Thickness", a program used to calculate the chip thickness in relation to feed-per-tooth for a milling cutter, especially during a shallow finishing cut. Ingersoll's "Rigidity Analysis" software ealculates tool deflection for end mills as a function of tool stiffness and tool force.To this point we looked at some general qualifications that a programmer should possess. Now we examine how a CAM system works. Point Control Company's SmartCam system uses the following approach. First, the programmer makes a mental model of the part to be machined. This includes the kind of machining to be performed-turning or milling. Then the part print is studied to develop a machining sequence, roughing and finishing cuts, drilling, tapping, and boring operations. What work-holding device is to be used, a vise or fixture or clamps? After these considerations, computer input can be started. First comes the creation of a JOBPLAN. This JOBPLAN consists of entries such as inch or metric units, machine type, part ID, type of workpiece material, setup notes, and a description of the required tools.This line of information describes the tool by number, type, and size and includes theappropriate cutting speed and feed rate. After all the selected tools are entered, the file is saved.The second programming step is the making of the part. This represents a graphic modeling of the projected machining operation. After selecting a tool from the prepared JOBPLAN, parameters for the cutting operation are entered. For a drill, once the coordinate location of the hole and the depth are given, a circle appears on that spot. If the location is incorrect, the UNDO command erases this entry and allows you to give new values for this operation. When an end mill is being used, cutting movements (toolpath) are usually defined as lines and arcs. As a line is programmed, the toolpath is graphically displayed and errors can be corrected instantly.At any time during programming, the command SHOWPATH will show the actual toolpath for each of the programmed tools. The tools will be displayed in the sequence in which they will be used during actual machining. If the sequence of a tool movement needs to be changed, a few keystrokes will to that.Sometimes in CAM the programming sequence is different from the actual machining order. An example would be the machining of a pocket in a part. With CAM, the finished pocket outline is programmed first, then this outline is used to define the ro ughing cuts to machine the pocket. The roughing cuts are computer generated from inputs such as depth and width of cut and how much material to leave for the finish cut. Different roughing patterns can be tried out to allow the programmer to select the most efllcient one for the actual machining cuts. Since each tool is represented by a different color, it is easy to observe the toolpath made by each one.A CAM system lets the programmer view the graphics model from varying angles, such as a top, front, side, or isometric view. A toolpath that looks correct from a top view, may show from a front view that the depth of the cutting tool is incorrect. Changes can easily be made and seen immediately.When the toolpath and the sequence of operations are satisfactory, machine ready code has to be made. This is as easy as specifying the CNC machine that is to be used to machine the part. The code generator for that specific CNC machin e during processing accesses four different files. The JOBPLAN file for the tool information and the GRAPHICE file for the toolpath and cutting sequence. It also uses the MACHINE DEFINE file which defines the CNC code words for that specific machine. This file also supplies data for maximum feed rates, RPM, toolchange times, and so on. The fourth file taking part in the code generating process is the TEMPLATE file. This file acts like a ruler that produces the CNC code with all of its parts in the right place and sequence. When the code generation is complete, a projected machining time is displayed. This time is calculated from values such as feed rates and distances traveled, noncutting movements at maximum feed rates between points, tool change times, and so on. The projected machining time can be revised by changing tooling to allow for higher metal removal rates or creating a more efficient toolpath. This display of total time required can also be used to estimate production costs. If more then one CNC machine tool is available to machine this part, making code and comparing the machining time may show that one machine is more efficient than the others.CAD/CAMAnother method of creating toolpath is with the use of a Computer-aided Drafting (CAD) file. Most machine drawings are created using computers with the description and part geometry stored in the computer database. SmartCAM, though its CAM CONNECTION, will read a CAD file and transfer its geometry represents the part profile, holes, and so on. The programmer still needs to prepare a JOBPLAN with all the necessary tools, but instead of programming a profile line by line, now only a tool has to be assigned to an existing profile. Again, using the SHOWPA TH function will display the toolpath for each tool and their sequence. Constant research and developments in CAD/CAM interaction will change how they work with each other. Some CAD and CAM programs, if loaded on the same computer, make it possible to switch between the two with a few keystrokes, designing and programming at the same time.The work area around the machine needs to be kept clean and clear of obstructions to prevent slipping or tripping. Machine surfaces should not be used as worktables. Use proper lifting methods to handle heavy workpieces, fixtures, or heavy cutting tools. Make measurements only when the spindle has come to a complete standstill. Chips should never be handled with bare hands.Before starting the machine make sure that the work-holding device and the workpiece are securely fastened. When changing cutting tools, protect the workpiece being machined from damage, and protect your hands from sharp cutting edges. Use only sharp cutting tools. Check that cutting tools are installed correctly and securely.Do not operate any machine controls unless you understand their function and what the y will do.The Early Development Of Numerically Controlled Machine ToolsThe highly sophisticated CNC machine tools of today, in the vast and diverse range found throughout the field of manufacturing processing, started from very humble beginnings in a number of the major industrialized countries. Some of the earliest research and development work in this field was completed in USA and a mention will be made of the UK's contribution to this numerical control development.A major problem occurred just after the Second World War, in that progress in all areas of military and commercial development had been so rapid that the levels of automation and accuracy required by the modern industrialized world could not be attained from the lab our intensive machines in use at that time. The question was how to overcome the disadvantages of conventional plant and current manning levels. It is generally ackonwledged that the earliest work into numerical control was the study commissioned in 1947 by the US governme nt. The study's conclusion was that the metal cutting industry throughout the entire country could not copy with the demands of the American Air Force, let alone the rest of industry! As a direct result of the survey, the US Air Force contracted the Persons Corporation to see if they could develop a flexible, dynamic, manufacturing system which would maximize productivity. TheMassachusetts Institute of Technology (MIT) was sub-contracted into this research and development by the Parsons Corporation, during the period 1949-1951,and jointly they developed the first control system which could be adapted to a wide range of machine tools. The Cincinnati Machine Tool Company converted one of their standard 28 inch "Hydro-Tel" milling machines or a three-axis automatic milling made use of a servo-mechanism for the drive system on the axes. This machine made use of a servomechanism for the drive system on the axes, which controlled the table positioning, cross-slide and spindle head. The machine cab be classified as the first truly three axis continuous path machine tool and it was able to generate a required shape, or curve, by simultaneous slide way motions, if necessary.At about the same times as these American advances in machine tool control were taking Place, Alfred Herbert Limited in the United Kingdom had their first Mutinous path control system which became available in 1956.Over the next few years in both the USA and Europe, further development work occurred. These early numerical control developments were principally for the aerospace industry, where it was necessary to cut complex geometric shapes such as airframe components and turbine blades. In parallel with this development of sophisticated control systems for aerospace requirements, a point-to-point controller was developed for more general machining applications. These less sophisticated point-to-point machines were considerably cheaper than their more complex continuous path cousins and were used when only positional accuracy was necessary. As an example of point-to-point motion on a machine tool for drilling operations, the typical movement might be fast traverse of the work piece under the drill's position-after drilling the hole, anther rapid move takes place to the next hole's position-after retraction of the drill. Of course, the rapid motion of the slideways could be achieved by each axis in a sequential and independent manner, or simultaneously. If a separate control was utilisec for each axis, the former method of table travel was less esse ntial to avoid any backlash in the system to obtain the required degree of positional accuracy and so it was necessary that the approach direction to the next point was always the same.The earliest examples of these cheaper point-to-point machines usually did not use recalculating ball screws; this meant that the motions would be sluggish, and sliderways would inevitably suffer from backlash, but more will be said about this topic later in the chapter.The early NC machines were, in the main, based upon a modified milling machine with this concept of control being utilized on turning, punching, grinding and a whole host of other machine tools later. Towards the end of the 1950s,hydrostatic slideways were often incorporated for machine tools of highly precision, which to sonic extent overcame the section problem associated with conventional slideway response, whiles averaging-out slideway inaccuracy brought about a much increased preasion in the machine tool and improved their control characteristics allows "concept of the machining center" was the product of this early work, as it allowed the machine to manufacture a range of components using a wide variety of machining processes at a single set-up, without transfer of workpieces to other variety machine tools. A machining center differed conceptually in its design from that of a milling machine, In that thecutting tools could be changed automatically by the transfer machanism, or selector, from the magazine to spindle, or vice versa.In this ductively and the automatic tool changing feature enabled the machining center to productively and efficiently machine a range of components, by replacing old tools for new, or reselecting the next cutter whilst the current machining process is in cycle.In the mid 1960s,a UK company, Molins, introduced their unique "System 24" which was meant represent the ability of a system to machine for 24 hours per day. It could be thought of as a "machining complex" which allowed a series of NC single purpose machine tools to be linked by a computerized conveyor system. This conveyor allowed the work pieces to be palletized and then directed to as machine tool as necessary. This was an early, but admirable, attempt at a form of Flexible manufacturing System concept, but was unfortunately doomed to failure. Its principal weakness was that only a small proportion of component varieties could be machine at any instant and that even fewer work pieces required the same operations to be performed on them. These factors meant that the utilization level was low, coupled to the fact that the machine tools were expensive and allowed frequent production bottlenecks of work-in-progress to arise, which further slowed down the whole operation.The early to mid-1970s was a time of revolutionary in the area of machine tool controller development, when the term computerized numerical control (CNC) became a reality. This new breed of controllers gave a company the ability to change work piece geometries, together with programs, easily with the minimum of development and lead time, allowing it to be economically viable to machine small batches, or even one-off successfully. The dream of allowing a computerized numerical controller the flexibility and ease of program editing in a production environment became a reality when two ralated factors occurred.These were:the development of integrated circuits, which reduces electronics circuit size, giving better maintenance and allowing more standardization of desing; that general purpose computers were reduced in size coupled to the fact that their cost of production had fallen considerably.The multipie benefits of cheaper electorics with greater reliability have result in the CNC fitted to the machine tools today, with the power and sophistication progtessing considerably in the last few years, allowing an almost artificial intelligence(AI) to the latest systems. Over the years, the machine tools builders have produced a large diversity in the range of applications of CNC and just some of those development will be reviewed in V olume Ⅲ。

外文翻译(1)(1)

外文翻译(1)(1)

注:红色字体表示语句不明白的地方,请求学姐帮忙。

聚亚烷基二醇的化学结构和它们在含水环境中的好氧生物降解性之间的关系简要:使用一组聚合流体,其中包括聚乙二醇、聚丙二烯(PPG)、不同EO/PO 比率的环氧乙烷(EO)的无规共聚物和环氧丙烷(PO),对聚亚烷基醇(PAG)的化学结构和它们的生物降解性之间的关系进行研究以及用PAG的醚和酰基部分封端。

被测试的PAG中有一个均分子量范围在350-3600Da,它们的差异是由其聚合物主链的直链(二醇型)或支链(三元醇型)分子。

PAG的最终生物降解能力是根据ISO14593(CO2顶空试验)用非预曝光(如在OECD310试验)和预曝光(改编)接种物来确定。

带有PPG结构和二元醇或三元醇的EO/PO共聚物,均分子量不超过1000沓的PAG,被认为是易于生物降解的。

他们的最终生物降解可超过60%的限制(根据OECD310测试标准)。

具有共聚结构并且MW值在1000-3600之间的PAG不易生物降解,但它们可以被看做是那些固有的最终降解物。

在PAG结构中EO含量的增长和末端羟基的酰化与羧酸基团有利地影响了他们的生物降解性。

含末端醚基团封端的PAG似乎是耐生物降解的。

关键词生物降解、聚亚烷基二醇、PAG、PPG、封顶PAG、ISO14593。

引言:术语中的聚亚烷基二醇-PAG,以及在相关文献中的PAG,例如,聚乙二醇,聚醚和聚(烯化氧)中使用的PAG术语都是带有环氧化物结构烯化氧聚合得到的化合物。

PAG主要是通过使用乙烯和丙烯的氧化物合成的,不常使用丁二醇和更高的烯烃氧化物。

PAG类化合物(不同的分子量,性能和应用)最常用的包括氧化乙烯或丙烯均聚物氧化物以及乙烯和丙烯氧化物的无规或嵌段共聚物。

PAG的分子结构不仅取决于种类和亚烷基氧化物的比例,而且还取决于用于聚合反应的引发剂分子的类型(单-,二-或多官能分子具有2个以上活泼氢原子)。

引发剂影响PAG分子的末端羟基基团和聚合物链的类型,其可以是线性的(单醇及二醇型)或支链的(多元醇的数类型)。

外文翻译英语原文编号01

外文翻译英语原文编号01

Vol.25 No.2 PANG Chaoming et al: Methods of Modifying the Brittle (156)DOI 10.1007/s11595-010-1156-yMethods of Modifying the Brittle Behavior ofCementitious CompositesPANG Chaoming1, SUN Wei1, LEUNG Christopher KY2(1.College of Materials Science and Engineering, Southeast University, Jiangsu Key laboratory of Construction Materials, Nanjing 211189,China;2. Department of Civil and Environmental Engineering, Hong Kong University of Science and Technology, Hong Kong, China SAR)Abstract: We put forward effective methods of increasing the tensile strain of cementitiouscomposites with 2% PVA fiber and high fly ash content. The test results show that curing condition hasa significantly effect on the tensile performance. It is approved that the specimens incorporated ap-propriate volume fraction rubber powder and lightweight aggregate greatly increase the tensile strain ofcomposites at medium-term age, but indefinitely at long-term age. To a certain extent, EVA can limitedlyenhance the tensile performance of comentitious composites owing to the formation of polymer membraneand the hindered hydration of cement.Key word: high-ductility cementitious composites (HDCC); tensile properties; high content offly ash; rubber powder; light aggregate; ethylene vinyl alcohol latex powder1 IntroductionCementitious composites are widely used as the majority of structural materials. However, cementitious composites are limited to some special projects due to the inherently brittle behavior. Most efforts have been made to modify the brittle behavior of cementitious composites all along. As a result, the fiber reinforced cementitious composites (FRCC) occurred. In comparison to plain concrete, FRC usually deteriorates the tensile or bending properties by the formation of several cracks and a main crack. In the past two decades, Li, Leung and Wu etc[1-3] investigated the bridging stress of fiber and proposed the theory for high-ductility cementitious composites (here-after abbreviated as HDCCs) or pseudo ductility cemen-titious composites or pseudo strain hardening cementi-tious composites, based on the two nondimensionalized parameters energy absorption rate and normalized flaw size. It has been demonstrated that the ductility behaviors of brittle materials can be achieved by multiple cracks in steady state along the length of the specimen and behave pseudo strain hardening (abbr. PSH). Hereafter, the theories for PSH in the cementitious composites were gradually developed by Li and his co-workers, and the particular theory for “composite design”, based on the micro mechanics parameter, by emphasizing the proper integrant materials and interface was proposed[4,5]. The cementitious composite with high tensile strain capacity of 3%-6%, whose strain capacity is far outperforming conventional cementitious composites, was achieved[6].Recently increasing researchers are interesting to the new type of fiber reinforced cementitious composite. However, it is not easy to achieve PSH in discontinuous random fiber reinforced. Strain due to a little deviation of raw materials occur even if the well-known same mixture proportion of ECC is used due to a little deviation of raw materials. Meanwhile, the design method of existing theory depend on known experimental micro mechanics parameters, such as the fracture toughness, fiber content, fiber strength, fiber distribution, the bridging stress and interface properties between fiber matrix, etc. Moreover, it is very difficult to achieve the accurate fiber distribu-tion and bridging stress due to the randomization and inhomogeneity of the distribution of fiber in composites. But the micromechanical parameters and the ductile be-havior is strongly affected by the bridging stress governed by fiber debonding, fiber bending, fiber rupture, matrix spalling and their coupling[2].The focus in the current study is to discover the ef-ficacious methods to increase the tensile strain of HDCC. It is well know that curing conditions have a significantly©Wuhan University of Technology and Springer-Verlag Berlin Heidelberg 2010 (Received: Jan. 6, 2009; Accepted: Oct. 16, 2009)PANG Chaoming(庞超明): Ph D candidate; E-mail: pangchao@seu. edu. cnJournal of Wuhan University of Technology-Mater. Sci. Ed. Feb.2010157conditions were used for comparison, considering that the structures in practice project are often exposed to different environment and different curing condition are usually applied according to the lab environment in the different researches. For the brittle cementitious com-posites, the matrix cracking strength, which is determined by the matrix toughness and the largest crack or flaw in the stress section of specimen provided that the matrix cracking is controlled by fracture process, does not de-crease unlimitedly but reaches a lower bound at steady state cracking stress with the growing flaw size [7]. Moreover, the discontinuous pre-existing flaw or mi-cro-voids may relax the crack-tip stress triaxiality, dif-fuse the intensity of crack-tip stress singularity and consume more energy. To ensure the formation of multiple cracks, it is desirable to introduce a rtificial flaws in the matrix to reduce its crack tip toughness and increase the crack size due to energy absorption of flaw [8]. Therefore, different materials, such as rubber powder and fine lightweight aggregate, were added to the composites to increase the strain capacity.2 ExperimentalSpecial green island brand P·II 52.5 cement was used. The range of particle size of fly ash is mainly 2-10 μm, and the active index of compressive strength at 7 days, 28 days and 90 days are the 86%, 84% and 96% respectively followed by ASTM C311-04. Polyvinyl alcohol fiber (abbr. PVAF) produced by Japan Kuraray Limited Corporation was used, and its density, length, diameter were 1.3 g/cm 3, 12 mm, 38 μm respectively,also its elastic modulus and rate of elongation is 33 GPaand 6.5% respectively.The particle size of silica fume, silica filler and silica sand used is 1-20 μm, 1-15 μm and 50-200 μm respec-tively. ADVA105 superplastics admixture (abbr. Sp) was %produced by Grace Co.LTD and its solid content is 23. SP4000 (abbr. SP4), which is ethylene vinyl alcohol (abbr. EVA) latex powder and is produced by Japan Kuraray Trading Co.LTD, was used in this study. The particle size of lightweight aggregate (abbr. LA) is between 1 mm and 3 mm, whose specific density is 1 500 kg/m 3, and the loose volume weight is about 780 kg/m 3. Rubber pow-der with the particle size of 0.4 mm was also used.The specimen was demoulded 24 hours after casting, where the temperature and relative humidity was about 20±2 ℃ and (60±5)% respectively, then cured in water at curing room , where the temperature is 27 ℃ (ac-cording to the BS standard). The nominal sizes used for tensile performance and compressive performance are about 350×50×15 mm and 40×40×40 mm respec-tively. The dimensions of the specimen were accurately measured by vernier caliper and all the specimens were polished to smooth surface before testing to obtain ac-curate experimental results, and at least three specimens were tested at each age.The tensile performance was tested under the dis-placement control in the MTS810-25 kN materials test-ing system with the displacement rate of 0.15 mm/min. Linear variable displacement transducer was used to measure the displacement at the gage length of 150 mm for the more accuracy purpose. The first crack strain εfc , the peak strain εp and the maximum strain εm repre-sent to the strain corresponding to the first crack stress σTc when the first crack occurred, peak stress σTp when the stress reaches the peak, and the strain when the stress descends up to 90% σTp , respectively.3 Results3.1 Effect of curing conditions on me-chanical properties of HDCCAccording to previous work, two mix proportions shown in Table 1 were used, i e , SP4 and W1 with high volume fraction fly ash and low ratio of water to binder (cement and fly ash). Table 1 Mix proportion in mass of HDCC No. cement FA SP4 sand water Sp PVAF SP4 1 3.9 0.1 1.0 1.1 0.022 0.090 W1 1 4.0 0 1.0 1.0 0.023 0.096For the purpose of comparing the effect of different curing condition on the tensile performance, four types of curing conditions were applied in mixture SP4 as fol-lowing: full dry curing in room temperature condition after demoulded, which corresponds to symbol D in the denominated title in Table 2, dry curing in room tem-perature condition after 3-day curing in water corre-sponding to symbol W3D, dry curing in room tempera-ture condition after 7-day water curing corresponding to symbol W7D, and 28-day water curing corresponding to symbol W. The only two types of curing conditions wereused in mixture W1: dry curing in room temperature condition after 7 days water curing and full water curing. Table 2 list the test results of the tensile strength and strain and compressive strength on different curing con-ditions at the age of 7-day and 28-day.Vol.25 No.2 PANG Chaoming et al : Methods of Modifying the Brittle …1583.2 Effect of rubber powder on mechanic-al properties of HDCCThe specimen without rubber powder is regarded as control specimen, and two mixtures of HDCCs with the rubber powder were prepared. SR7 and SR11 represent for HDCC of the volume fraction of 7% and 11%, re-spectively. For estimating the long-term performance, the accelerated curing method was conducted, that is, after cured in water for 7 days, at least three specimens were put to the heat curing room for 72 hours, where the temperature and relative humidity are 80 ℃%and 95respectively, the mechanical performance was measured after being cooled down in the room temperature condi-tion. The mix proportion used and test results are sum-marized in Table 3, Table 4 respectively. Heat curing corresponds to symbol HC. Fig.1 shows the tensile stress versus strain curves of SR7 and SR11 at 28 days.3.3 Effect of lightweight aggregate onmechanical properties of HDCC For the purpose of researching the effect of light-weight aggregate on the tensile strain of HDCC with highflyash content, the volume fraction of 3.5% was incor-porated into the mixture, and the mix proportion was listed in Table 5. The specimen FA3 and FA3LA corre-spond to control specimen and specimen with lightweight aggregate, respectively.The test results are shown in Table 6. The condition of heat curing is the same as mentioned above. Fig.2(a) and Fig.2(b) showed the typical stress vs strain curve of FA3 and FA3LA3.5 at different age: 7 days, 28 days and heat curing 3 days.Table 2 Test results of HDCC on different curing conditionsSP4D SP4W3D SP4W7D SP4W W1 7-day 28-day 7-day 28-day 28-day 90-day 7-day 28-day W7 W28 W7DσTfc /MPa 2.68 2.36 2.91 2.54 3.26 3.28 2.70 3.36 2.76 3.65 3.62 εfc /% 0.080 0.069 0.075 0.096 0.080 0.089 0.119 0.060 0.088 0.047 0.128 σTp /MPa 3.30 3.39 3.76 3.14 4.07 3.62 3.17 4.02 3.27 3.81 4.69εp /% 1.53 3.95 2.69 2.56 2.82 2.58 2.78 0.77 1.050.35 2.94 εm /% 1.69 4.28 2.80 2.79 3.54 2.66 2.97 1.81 1.360.54 3.39 σcom /MPa 22.8 27.2 — — — — 23.4 36.0 35.8 58.9 — Table 3 Mix proportion in mass of HDCC with different volume fraction of rubber powder No. Cement FA Filler Sand Rubber Water Sp PVAFControl 1 1.50 0.25 1.00 0 0.63 0.015 0.057 SR7 1 1.50 0.25 0.65 0.163 0.58 0.020 0.055 SR11 1 1.50 0.25 0.40 0.263 0.58 0.020 0.055 Table 4 Test results of HDCCs with different volume fraction of rubber powderControl SR7 SR117-day 28-day 90-day 7-day 28-day HC 7-day 28-day HCσTfc /MPa 3.58 4.61 3.81 2.31 2.60 3.63 2.19 2.31 3.28 εfc /% 0.050 0.042 0.027 0.036 0.022 0.039 0.034 0.051 0.041 σTp/MPa 4.30 5.05 4.53 2.49 3.00 3.81 2.72 3.18 3.57 εp /% 1.33 0.84 0.29 0.31 0.58 0.16 1.04 2.15 0.20 εm/% 1.59 0.98 0.39 0.54 1.07 0.71 1.40 2.49 0.34 σcom /MPa 49.6 66.2 — 29.7 35.7 40.5 24.8 31.4 37.0 Table 5 Mix proportion in mass No. Cement FA LA Sand Water Sp PVAF FA3 1 3 — 1 1 0.025 0.056 FA3LA 1 3 0.16 1 1 0.028 0.056 Table 6 Test results of HDCCs with or without lightweightaggregate FA3 FA3LA 7 d 28 d 90 d HC 7 d 28 d 90 d HCσTfc /MPa 1.42 2.68 3.60 4.38 2.86 3.15 3.25 6.42εfc /% 0.015 0.044 0.031 0.022 0.025 0.045 0.040 0.037 σTp /MPa 2.91 3.46 4.86 4.86 2.86 3.91 3.92 6.49εp /% 0.04 0.58 0.29 0.08 0.03 1.96 0.23 0.04 εm /% 1.16 0.96 0.66 0.31 1.40 2.07 0.54 0.38 σcom/MPa 21.5 44.7 69.5— 19.0 44.2 74.8 —Journal of Wuhan University of Technology-Mater. Sci. Ed. Feb.20101593.4 Effect of EVA powder on mechanicalproperties of HDCCA series of HDCCs specimens with or without EVA powder were also prepared, cured and tested at prescribed age followed by the test procedure. The condition of heat curing is also the same as mentioned above. The mix proportion used is listed in Table 7, and test results of tensile properties are presented in Table 8 and Fig.2(c) respectively. S is the control specimen, and SS4 is representative for HDCC with EVA powder.4 Discussion It can be concluded that the curing conditions have a great effect on the tensile properties from Table 1 and Table 2. The tensile properties exhibit a great difference at 28 days due to different curing condition for mixture SP4 and mixture W1. The HDCC cured in water per-forms better than that in room temperature condition atthe early age, however, as the age increases, the tensileperformance of HDCCs cured in room temperature condition shows an increasing tendency while that curedin the water decreases. The tensile strain of specimensthat of W3D is similar to that of W7D at 28 days, whichtest results also show the ultimate tensile strength has not direct relationship with the tensile strain, and high tensile strain do not mean low tensile strength, and vice versa . That can be explained as follows: curing condi-tion plays a significant influence on microstructure and macroscopical performance of cementitious composites. For fiber reinforced cementitious composites, there exists a distinctive layer of interface zone about 30-50 μm away from the fiber surface [9]. Also the interface will strongly influence the toughness of the compositesand frictional bond [10]. Generally the interface zone is considerable weaker than the matrix due to the large calcium hydroxide crystals and higher porosity for the FRCCs with steel fiber or polypropylene fiber [9], but thePVA fiber is a special organic fiber to the cementitiouscomposites. The majority of fibers used to the cementi-tious composites, such as steel fiber, polypropylenefiber,etc , will not react with the hydration products of cement, but the investigations by Akers show that [11], the PVA fiber performs surprisingly high chemical bonding between the PVA fiber and cement hydrationproducts due to the strong hydrophilic characteristic or hydrogen intermolecular bond induced by the hydroxyl groups, and as the age increase, while there are no evi-dent change in fiber properties, the bonding strengthbetween fiber and cement-based matrix will increase due to an increase in interface bond with age. The re-searches by Kanda T etc also shows that the apparent chemical bonding between PVA fiber and cement ma-,trix independent of the water-to cement ratio of matrix, is relatively stable and up to 30-40 MPa, but the value of friction bond, affected by water to cement ratio, is be-tween 2.2 MPa to 4.4 MPa when the water to cementvaries from 0.62 to 0.27[12]. Through the investigation by Li and his co-workers [3], only the FRCC with the appropriate fracture toughness of matrix and frictional Table 7 Mix proportion with or without EVA in mass No. Cement FA SF SP4 Sand Water Sp PVAF S 1 3.85 0.1 — 1 1.21 0.033 0.096 SS4 1 3.60 0.1 0.1 1 1.21 0.032 0.096 Table 8 Test results of HDCCs with or without EVAS SS47 d 28 d HC 7 d 28 d HCσTfc /MPa 1.15 3.32 4.37 1.86 3.14 3.89 εfc/% 0.021 0.067 0.029 0.057 0.086 0.049 σTp /MPa 1.94 3.43 4.90 2.03 3.42 4.75 εp /% 0.20 1.18 0.33 0.49 1.24 0.60εm /% 0.54 1.63 0.40 1.55 1.73 0.74 σcom /MPa 13.0 33.5 — 13.0 35.4 — (a) FA3 (b) FA3LA (c) S and SS4Fig.2 Stresses vs. Strain curves of FA3, FA3LA, S and SS4 at different ageVol.25 No.2 PANG Chaoming et al: Methods of Modifying the Brittle (160)and high strain capacity of FRCC can dominantly be achieved by using PVA fiber, and the interfacial fric-tional stress for FRCC with PSH behavior show the relative definite requirement and shall preferably be between 0.8 to 2.0 MPa[13], and the value can be achieved by applying oil agent[14]. In the present study, the PVA fiber, which had been coated with the oiling agent by Japan Kuraray Co. LTD, was employed. Ow-ing to low water to binder ratio and high content of fly ash (W/B=0.20, FA/C=4.0), and the specimens were kept only for 0-7 days in water and then longer than 20 days cured in room temperature condition, where there is no enough water for cement hydration, therefore they exhibit relative lower hydration degree and larger shrinkage than those cured in the water in all time. The lower hydration degree and larger shrinkage result in relatively lower frictional bond and weaker interface between PVA fiber and matrix[15]. Therefore, the former forms relatively looser structure and satisfies the re-quirement of low interfacial frictional stress, therefore performs better in strain hardening. Also the failure pat-tern of fiber rupture can be observed in testing process of the latter.In general, the definite range of interfacial fric-tional stress for achieving PSH behavior of FRCC, lower ratio of cement to binder, high fly ash content and PVA fiber properties contribute to the effect of curing condition on the tensile behavior.It can be deduced from Table 4, Table 6, Fig.1 and Fig.2 that the tensile strength of HDCC with rubber powder or light aggregate keep on growing, while the tensile strain also increases as the age increases from 7 days to 28 days, then decreased as the age continually grows up to 90 days or when heat curing was applied. That is because the fiber/matrix bond strength should saturate in a duration of less than 14-28 days, and ma-ture much earlier than matrix properties in cementi-tious[16]. But the high content of fly ash will considera-bly lower the chemical bond and delay the mature due to diluting the metal cation concentration on the fiber surface at early age and as a result the strain increases from 7 days to 28 days[17]. But the friction strength and the facture toughness of matrix continue to develop as age increase to 28 days as the second hydration of fly ash continually develop due to activity effect of fly ash under high temperature or at long age. When the imbal-ance of develop rate occurs, the strain decreases with the continual increasing age.From Table 4 and Table 6, not all the specimens show better tensile performance than the control specimen, only the tensile strain of the specimens with 11% volume fraction rubber powder or 3.5% light-weight aggregate increase comparing to the control specimen at 28 days. The specimens FA3 and FA3LA rapidly reach ultimate strength then crack, and only few cracks develop due to the high fracture toughness of matrix and the low friction between matrix and PVA fiber at 7 days, but the specimen can still maintain the considerable strain after cracking owing to fiber gradu-ally being pulled out. And the SR7 also shows the similar tendency at 28 days. It is possible that the frac-ture toughness of matrix develops faster than the chemical bond and the frictional bond due to the low ratio of water to binder and high content fly ash. However, the specimen with the 11% volume fraction rubber pow-der reaches 2.15% in comparison with only 0.84% for the corresponding control specimen and the ultimate strain of with or without lightweight aggregate varies from 1.96% to 0.58%. The similar test results, i e, pre-existing flaw or micro-voids can modify the brittle behavior of HDCC, were observed in the reference[8] as the pre-existing flaw can relax the crack-tip triaxiality, diffuse the intensity of crack-tip stress and consume more energy, and the lager flaw will not influence the cracking strength but reached a lower bound at a steady state of cracking stress.Table 8 and Fig.2 present that the EVA latex powder show a little positive effect on the tensile strain at different age. It is possible that the EVA as a polymer can form a layer polymer membrane, which hinders the hydration of cementitious materials, but the membrane only influences a little hydration process owing to the lower content, about 1% volume fraction, in compos-ites.In summary, the appropriate fracture toughness of matrix and frictional bond between fiber and matrix is necessary conditions to achieve the PSH behavior or high strain capability. The curing condition emphasize particularly on the influence of friction bond, but the incorporation of rubber powder and lightweight lay particular stress on the fracture toughness of matrix. However the incorporation of rubber powder and lightweight aggregate lower the fracture toughness of matrix and facilitate the crack of matrix, which will possibly lower the effect of curing condition on the tensile properties.Journal of Wuhan University of Technology-Mater. Sci. Ed. Feb.2010 1615 ConclusionsSome methods to modifying the brittle behavior of HDCC with high content fly ash are proposed. It is undoubted that curing condition will strongly influence the microstructure of cementitious composites. The test results show that curing condition has a significant ef-fect on the tensile strain of HDCC with high content fly ash, and dry curing condition will show the clear trend to increase the tensile strain of HDCC with high content fly ash. Not all the specimens but the specimens with appropriate volume fracture rubber powder and light-weight aggregate greatly enhance the tensile strain of HDCC at medium-term age, but indefinitely at long-term age impossibly because disconnected pre-existing flaw or micro-voids may relax the crack-tip, diffuse the intensity of crack-tip stress and significantly consume energy. To a certain extent, EVA can enhance the tensile performance of HDCC owing to the hindered hydration of cement based materials as a result of the formation of polymer membrane. But it is possible that the incorporation of rubber powder and lightweight will lower the effect of curing condition on the tensile per-formance.It also experimentally demonstrates that some specimens rapidly reach ultimate strength and crack, but some specimen can still maintain the considerable strain after cracking owing to fiber gradually being pulled out. The tensile stress keeps increasing, but the tensile strain firstly increases then decreases as the age continually grows because of the imbalance of develop rate between bond strength and matrix properties. References[1]LI V C and LEUNG C K Y. Steady-state and MultipleCracking of Short Random Fiber Composites[J]. Journal ofEngineering Mechanics, 1992, 118(11): 2 246-2 264[2]LEUNG C K Y and LI V C. Effect of Fiber Inclination onCrack Bridging Stress in Fiber Reinforced Brittle MatrixComposites[J]. Journal of Mechanical Physics, 1992, 40(6):1 333-1 362[3]LI V C and WU H C. Conditions for PseudoStrain-Hardening in Fiber Reinforced Brittle MatrixComposites[J]. Applied Mechanics Revolution, 1992, 45(8):390-398[4]LI V C, MISHRA D K and WU H C. Matrix Design forPseudo-Strain-Hardening Fiber Reinforced CementitiousComposites[J]. Materials and Structures, 1995, 28: 586-595 [5]KANDA T, LI V C and Member of ASCE. New Micro-mechanics Design Theory for Pseudostrain Hardness Ce-mentitious Composite[J]. Journal of Engineering Me-chanics, 1999, 125(4): 373-381[6]LI V C, WANG S and WU C. Tensile Strain- HardeningBehavior or Polyvinyl Alcohol Engineered CementitiousComposite (PVA-ECC)[J]. ACI Materials Journal, 2001,98(6): 483-492[7]MAESHALL D B, COX B N and EVANS A G. The Mechan-ics of Matrix Cracking in Brittle Matrix Fiber Composites[J].ACTA Metallurgical, 1985, 33(11): 2 013-2 021[8]WANG S and LI V C. Tailoring of Pre-Existing Flaw inECC Matrix for Saturated Strain Hardening[C]. Proceed-ings of the Fifth International Conference on FractureMechanics of Concrete and Concrete Structures. Colorado:Ia-FraMCos, 2004: 1 005-1 012[9]Li V C, WU H C, and CHAN Y W. Interfacial PropertyTailoring for Pseudo Strain-Hardening Cementitious Composites[C]. Advanced Technology on Design and Fabrication of Composite Materials and Structures. Neth-erlands: Kluwer Acad. Publ., 1995: 261-268[10]SUN W, MANDEL J A and SAID Samir. Studies of theProperties of the Fiber-Matrix Interface in Steel Fiber Re-inforced Mortar[J]. ACI Materials Journal, 1987, 84(12):101-109[11]AKERS S A S. Long Term Durability of PVA ReinforcingFibers in a Cement Matrix[J]. The International Journal ofCement Composite and Lightweight Concrete, 1989, 11:79-91[12]KANDA T and LI V C. Interface Property and ApparentStrength of High-Strength Hydrophilic Fiber in CementMatrix[J]. Journal of Materials in Civil Engineering, 1998,10(1): 5-13[13]LI V C and WANG S. Process for Increasing the Ductilityof High Performance Fiber-Reinforced Brittle Matrix Composites and Composites Produced Thereby[P]. US Patent 7169224. 2007-01-30[14]REDON C. Measuring and Modifying Interface Propertiesof PVA Fibers in ECC Matrix[J]. ASCE J. Materials inCivil Engineering, 2001, 13(6): 399-406[15]CHEN H SUN W and PIET S. Interfacial Transition ZoneBetween Aggregate and Paste in Cementitious Composites(II): Mechanism of Formation and Degradation of Interfa-cial Transition Zone Microstructure and Its Influence Factors[J].Journal of the Cement Ceramic Society, 2004, 32(1): 70-80 [16]CHAN Y W and LI V C. Age Effect on the Characteristicsof Fibre/Cement Interfacial Properties[J]. Journal of Ma-terials Science, 1997, 32: 5 287-5 292[17]WANG S and LI V C. Engineered Cementitious Compos-ites with High-Volume Fly Ash[J]. ACI Materials Journal,2007, 104(3): 233-241。

毕业设计(论文)外文资料翻译(学生用)

毕业设计(论文)外文资料翻译(学生用)

毕业设计外文资料翻译学院:信息科学与工程学院专业:软件工程姓名: XXXXX学号: XXXXXXXXX外文出处: Think In Java (用外文写)附件: 1.外文资料翻译译文;2.外文原文。

附件1:外文资料翻译译文网络编程历史上的网络编程都倾向于困难、复杂,而且极易出错。

程序员必须掌握与网络有关的大量细节,有时甚至要对硬件有深刻的认识。

一般地,我们需要理解连网协议中不同的“层”(Layer)。

而且对于每个连网库,一般都包含了数量众多的函数,分别涉及信息块的连接、打包和拆包;这些块的来回运输;以及握手等等。

这是一项令人痛苦的工作。

但是,连网本身的概念并不是很难。

我们想获得位于其他地方某台机器上的信息,并把它们移到这儿;或者相反。

这与读写文件非常相似,只是文件存在于远程机器上,而且远程机器有权决定如何处理我们请求或者发送的数据。

Java最出色的一个地方就是它的“无痛苦连网”概念。

有关连网的基层细节已被尽可能地提取出去,并隐藏在JVM以及Java的本机安装系统里进行控制。

我们使用的编程模型是一个文件的模型;事实上,网络连接(一个“套接字”)已被封装到系统对象里,所以可象对其他数据流那样采用同样的方法调用。

除此以外,在我们处理另一个连网问题——同时控制多个网络连接——的时候,Java内建的多线程机制也是十分方便的。

本章将用一系列易懂的例子解释Java的连网支持。

15.1 机器的标识当然,为了分辨来自别处的一台机器,以及为了保证自己连接的是希望的那台机器,必须有一种机制能独一无二地标识出网络内的每台机器。

早期网络只解决了如何在本地网络环境中为机器提供唯一的名字。

但Java面向的是整个因特网,这要求用一种机制对来自世界各地的机器进行标识。

为达到这个目的,我们采用了IP(互联网地址)的概念。

IP以两种形式存在着:(1) 大家最熟悉的DNS(域名服务)形式。

我自己的域名是。

所以假定我在自己的域内有一台名为Opus的计算机,它的域名就可以是。

外文翻译

外文翻译

基于全球定位系统监控高层建筑的动态响应T. Kijewski-Correa, M.ASCE; A. Kareem, M.ASCE; and M. Kochly, S.M.ASCE摘要:长期以来,土木工程界都需要精确的全球位移测量方法用于工程建设和结构的安全监测。

随着可用的跟踪采样率和分辨率的快速进步,全球定位系统GPS为这一挑战提供了一个答案。

然而,在全面应用前,作为一种较新的动态传感技术,GPS性能必须进行彻底的验证。

本文详细介绍了实现这一目的的一个实验程序,记录了一个背景噪声和动态跟踪能力的高精度GPS性能,同时提供了符合要求全面跟踪的位置精度。

鉴于研究中观测到的性能,提供了全面部署的注意事项,并对芝加哥的一个高层建筑的动态运动全面监测项目监测进行评估。

DOI:10.1061/ ASCE 0733-9445 2006 132:8 1242数据库关键字:位移;测量;结构可靠性;全球定位系统;高层建筑;动态响应.测区简介随着土木工程项目的复杂性和成本越来越多,工程项目要确保投资获得重大利益,需要在以下两方面着力落实,第一是在工程的安全运行和维护下,确保使用寿命长;第二是要与现代设计实践的高效率相结合。

满足这两方面要求,可以借助仪器和结构监测的功能和方法,无论是在全球范围内,利用遥感观测,还是在一个地方利用应变传感元件的水平。

然而,虽然通过建立全球响应感应器监测,也只能提供谐振响应指示和未能捕捉静态和准静态行为。

在安全监测、静态变形,是否由于沉降的背景下,热膨胀,甚至永久性损伤的一些意外事件,它们发生的几率还是存在的。

特别是,由于使用习惯的感应器,对于比较高和柔性的建筑结构,这样的静态与准静态响应的影响是显著的,很少观察到满量程的。

随后的全球位移传感方法响应这些需求而被开发。

其中的技术,包括地面定位系统,激光位移传感器,照片/视频成像技术,最近都受到了不同的关注,但在恶劣大气中的条件里,有效的运用往往还是不可行的,因为要实行连续的,无人值守的,长期监测。

五分钟搞定5000字-外文文献翻译

五分钟搞定5000字-外文文献翻译

五分钟搞定5000字-外文文献翻译在科研过程中阅读翻译外文文献是一个非常重要的环节,许多领域高水平的文献都是外文文献,借鉴一些外文文献翻译的经验是非常必要的。

由于特殊原因我翻译外文文献的机会比较多,慢慢地就发现了外文文献翻译过程中的三大利器:Google“翻译”频道、金山词霸(完整版本)和CNKI“翻译助手"。

具体操作过程如下:1.先打开金山词霸自动取词功能,然后阅读文献;2.遇到无法理解的长句时,可以交给Google处理,处理后的结果猛一看,不堪入目,可是经过大脑的再处理后句子的意思基本就明了了;3.如果通过Google仍然无法理解,感觉就是不同,那肯定是对其中某个“常用单词”理解有误,因为某些单词看似很简单,但是在文献中有特殊的意思,这时就可以通过CNKI的“翻译助手”来查询相关单词的意思,由于CNKI的单词意思都是来源与大量的文献,所以它的吻合率很高。

另外,在翻译过程中最好以“段落”或者“长句”作为翻译的基本单位,这样才不会造成“只见树木,不见森林”的误导。

注:1、Google翻译:/language_tools google,众所周知,谷歌里面的英文文献和资料还算是比较详实的。

我利用它是这样的。

一方面可以用它查询英文论文,当然这方面的帖子很多,大家可以搜索,在此不赘述。

回到我自己说的翻译上来。

下面给大家举个例子来说明如何用吧比如说“电磁感应透明效应”这个词汇你不知道他怎么翻译,首先你可以在CNKI里查中文的,根据它们的关键词中英文对照来做,一般比较准确。

在此主要是说在google里怎么知道这个翻译意思。

大家应该都有词典吧,按中国人的办法,把一个一个词分着查出来,敲到google里,你的这种翻译一般不太准,当然你需要验证是否准确了,这下看着吧,把你的那支离破碎的翻译在google里搜索,你能看到许多相关的文献或资料,大家都不是笨蛋,看看,也就能找到最精确的翻译了,纯西式的!我就是这么用的。

翻译

翻译

中国石油大学(华东)本科毕业设计(论文)外文翻译学生姓名:姜华学号:06083201专业班级:软件工程2006级2班指导教师:梁玉环2010年6月10日Database ManagementDatabase (sometimes spelled database) is also called an electronic database, referring to any collections of data, or information, that is specially organized for rapid search and retrieval by a computer. Databases are structured to facilitate the storage, retrieval modification and deletion of data in conjunction with various data-processing operations. Database can be stored on magnetic disk or tape, optical disk, or some other secondary storage device.A database consists of a file or a set of files. The information in the these files may be broken down into records, each of which consists of one or more fields are the basic units of data storage, and each field typically contains information pertaining to one aspect or attribute of the entity described by the database. Using keywords and various sorting commands, users can rapidly search, rearrange, group, and select the fields in many records to retrieve or create reports on particular aggregates of data.Database records and files must be organized to allow retrieval of the information. Early system were arranged sequentially (i.e., alphabetically, numerically, or chronologically); the development of direct-access storage devices made possible random access to data via indexes. Queries are the main way users retrieve database information. Typically the user provides a string of characters, and the computer searches the database for a corresponding sequence and provides the source materials in which those characters appear.A user can request, for example, all records in which the content of the field for a person’s last name is the word Smith.The many users of a large database must be able to manipulate the information within it quickly at any given time. Moreover, large business and other organizations tend to build up many independent files containing related and even overlapping data, and their data, processing activities often require the linking of data from several files. Several different types of database management systems have been developed to support these requirements: flat, hierarchical, network, relational, and object-oriented.In flat databases, records are organized according to a simple list of entities; many simple databases for personal computers are flat in structure. The records in hierarchical databases are organized in a treelike structure, with each level of records branching off into a set of smaller categories. Unlike hierarchical databases, which provide single links between sets of records at different levels, network databases create multiple linkages between sets by placing links, or pointers, to one set of records in another; the speed and versatility of network databases have led to their wide use in business. Relational databases are used where associations among files or records cannot be expressed by links; a simple flat list becomes one table, or “relation”, and multiple relations can be mathematically as sociated toyield desired information. Object-oriented databases store and manipulate more complex data structures, called “objects”, which are organized into hierarchical classes that may inherit properties from classes higher in the chain; this database structure is the most flexible and adaptable.The information in many databases consists of natural-language texts of documents; number-oriented database primarily contain information such as statistics, tables, financial data, and raw scientific and technical data. Small databases can be maintained on personal-computer systems and may be used by individuals at home. These and larger databases have become increasingly important in business life. Typical commercial applications include airline reservations, production management, medical records in hospitals, and legal records of insurance companies. The largest databases are usually maintained by governmental agencies, business organizations, and universities. These databases may contain texts of such materials as catalogs of various kinds. Reference databases contain bibliographies or indexes that serve as guides to the location of information in books, periodicals, and other published literature. Thousands of these publicly accessible databases now exist, covering topics ranging from law, medicine, and engineering to news and current events, games, classified advertisements, and instructional courses. Professionals such as scientists, doctors, lawyers, financial analysts, stockbrokers, and researchers of all types increasingly rely on these databases for quick, selective access to large volumes of information.DBMS Structuring TechniquesSequential, direct, and other file processing approaches are used to organize and structure data in single files. But a DBMS is able to integrate data elements from several files to answer specific user inquiries for information. That is, the DBMS is able to structure and tie together the logically related data from several large files.Logical Structures. Identifying these logical relationships is a job of the data administrator. A data definition language is used for this purpose. The DBMS may then employ one of the following logical structuring techniques during storage access, and retrieval operations.List structures. In this logical approach, records are linked together by the use of pointers. A pointer is a data item in one record that identifies the storage location of another logically related record. Records in a customer master file, for example, will contain the name and address of each customer, and each record in this file is identified by an account number. During an accounting period, a customer may buy a number of items on different days. Thus, the company may maintain an invoice file to reflect these transactions. A list structure could be used in this situation to show the unpaid invoices at any given time. Each record in the customer in the invoice file. This invoice record, in turn, would be linked to later invoices for the customer. The last invoice in the chain would be identified by the useof a special character as a pointer.Hierarchical (tree) structures. In this logical approach, data units are structured in multiple levels that graphically resemble an “upside down” tree with the root at the top and the branches formed below. There’s a superior-subordinate relationship in a hierarchical (tree) structure. Below the single-root data component are subordinate elements or nodes, each of which, in turn, “own” one or more other elements (or none). Each element or branch in this structure below the root has only a single owner. Thus, a customer owns an invoice, and the invoice has subordinate items. The branches in a tree structure are not connected.Network Structures. Unlike the tree approach, which does not permit the connection of branches, the network structure permits the connection of the nodes in a multidirectional manner. Thus, each node may have several owners and may, in turn, own any number of other data units. Data management software permits the extraction of the needed information from such a structure by beginning with any record in a file.Relational structures. A relational structure is made up of many tables. The data are stored in the form of “relations” in these tables. For example, relation t ables could be established to link a college course with the instructor of the course, and with the location of the class.To find the name of the instructor and the location of the English class, the course/instructor relation is searched to get the name (“Fitt”), and the course/location relation is a relatively new database structuring approach that’s expected to be widely implemented in the future.Physical Structures. People visualize or structure data in logical ways for their own purposes. Thus, records R1 and R2 may always be logically linked and processed in sequence in one particular application. However, in a computer system it’s quite possible that these records that are logically contiguous in one application are not physically stored together. Rather, the physical structure of the records in media and hardware may depend not only on the I/O and storage devices and techniques used, but also on the different logical relationships that users may assign to the data found in R1and R2. For example, R1 and R2 may be records of credit customers who have shipments send to the same block in the same city every 2 weeks. From the shipping department manager’s perspective, then, R1 and R2 are sequential entries on a geographically organized shipping report. But in the A/R application, the customers represented by R1 and R2 may be identified, and their accounts may be processed, according to their account numbers which are widely separated. In short, then, the physical location of the stored records in many computer-based information systems is invisible to users.Database Management Features of OracleOracle includes many features that make the database easier to manage. We’ve divided the discussion in this section into three categories: Oracle Enterprise Manager, add-on packs,backup and recovery.1. Oracle Enterprise ManagerAs part of every Database Server, Oracle provides the Oracle Enterprise Manager (EM), a database management tool framework with a graphical interface used to manage database users, instances, and features (such as replication) that can provide additional information about the Oracle environment.Prior to the Oracle8i database, the EM software had to be installed on Windows 95/98 or NT-based systems and each repository could be accessed by only a single database manager at a time. Now you can use EM from a browser or load it onto Windows 95/98/2000 or NT-based systems. Multiple database administrators can access the EM repository at the same time. In the EM repository for Oracle9i, the super administrator can define services that should be displayed on other administrators’ consoles, and management regions can be set up.2. Add-on packsSeveral optional add-on packs are available for Oracle, as described in the following sections. In addition to these database-management packs, management packs are available for Oracle Applications and for SAP R/3.(1)standard Management PackThe Standard Management Pack for Oracle provides tools for the management of small Oracle databases (e.g., Oracle Server/Standard Edition). Features include support for performance monitoring of database contention, I/O, load, memory use and instance metrics, session analysis, index tuning, and change investigation and tracking.(2)Diagnostics PackYou can use the Diagnostic Pack to monitor, diagnose, and maintain the health of Enterprise Edition databases, operating systems, and applications. With both historical and real-time analysis, you can automatically avoid problems before they occur. The pack also provides capacity planning features that help you plan and track future system-resource requirements.(3)Tuning PackWith the Tuning Pack, you can optimise system performance by identifying and tuning Enterprise Edition databases and application bottlenecks such as inefficient SQL, poor data design, and the improper use of system resources. The pack can proactively discover tuning opportunities and automatically generate the analysis and required changes to tune the systems.(4)Change Management PackThe Change Management Pack helps eliminate errors and loss of data when upgrading Enterprise Edition databases to support new applications. It impact and complex dependencies associated with application changes and automatically perform databaseupgrades. Users can initiate changes with easy-to-use wizards that teach the systematic steps necessary to upgrade.(5)AvailabilityOracle Enterprise Manager can be used for managing Oracle Standard Edition and/or Enterprise Edition. Additional functionality is provided by separate Diagnostics, Tuning, and Change Management Packs.3. Backup and RecoveryAs every database administrator knows, backing up a database is a rather mundane but necessary task. An improper backup makes recovery difficult, if not impossible. Unfortunately, people often realize the extreme importance of this everyday task only when it is too late –usually after losing business-critical data due to a failure of a related system.The following sections describe some products and techniques for performing database backup operations.(1)Recovery ManagerTypical backups include complete database backups (the most common type), database backups, control file backups, and recovery of the database. Previously, Oracle’s Enterprise Backup Utility (EBU) provided a similar solution on some platforms. However, RMAN, with its Recovery Catalog stored in an Oracle database, provides a much more complete solution. RMAN can automatically locate, back up, restore, and recover databases, control files, and archived redo logs. RMAN for Oracle9i can restart backups and restores and implement recovery window policies when backups expire. The Oracle Enterprise Manager Backup Manager provides a GUI-based interface to RMAN.(2)Incremental backup and recoveryRMAN can perform incremental backups of Enterprise Edition databases. Incremental backups back up only the blocks modified since the last backup of a datafile, tablespace, or database; thus, they’re smaller and faster than complete backups. RMAN can also perform point-in-time recovery, which allows the recovery of data until just prior to a undesirable event.(3)Legato Storage ManagerVarious media-management software vendors support RMAN. Oracle bundles Legato Storage Manager with Oracle to provide media-management services, including the tracking of tape volumes, for up to four devices. RMAN interfaces automatically with the media-management software to request the mounting of tapes as needed for backup and recovery operations.(4)AvailabilityWhile basic recovery facilities are available for both Oracle Standard Edition and Enterprise Edition, incremental backups have typically been limited to Enterprise Edition. Choosing between Oracle and SQL ServerI have to decide between using the Oracle database and WebDB vs. Microsoft SQL Server with Visual Studio. This choice will guide our future Web projects. What are the strong points of each of these combinations and what are the negatives?Lori: Making your decision will depend on what you already have. For instance, if you want to implement a Web-based database application and you are a Windows-only shop, SQL Server and the Visual Studio package would be fine. But the Oracle solution would be better with mixed platforms.There are other things to consider, such as what extras you get and what skills are required. WebDB is a content management and development tool that can be used by content creators, database administrators, and developers without any programming experience. WebDB is a browser-based tool that helps ease content creation and provides monitoring and maintenance tools. This is a good solution for organizations already using Oracle. Oracle also scales better than SQL Server, but you will need to have a competent Oracle administrator on hand.The SQL Sever/Visual Studio approach is more difficult to use and requires an experienced object-oriented programmer or some extensive training. However, you do get a fistful of development tools with Visual Studio: Visual Basic, Visual C++, and Visual InterDev for only $1,619. Plus, you will have to add the cost of the SQL Server, which will run you $1,999 for 10 clients or $3,999 for 25 clients-a less expensive solution than Oracle’s.Oracle also has a package solution that starts at $6,767, depending on the platform selected. The suite includes not only WebDB and Oracle8i but also other tools for development such as the Oracle application server, JDeveloper, and Workplace Templates, and the suite runs on more platforms than the Microsoft solution does. This can be a good solution if you are a start-up or a small to midsize business. Buying these tools in a package is less costly than purchasing them individually.Much depends on your skill level, hardware resources, and budget. I hope this helps in your decision-making.Brooks: I totally agree that this decision depends in large part on what infrastructure and expertise you already have. If the decision is close, you need to figure out who’s going to be doing the work and what your priorities are.These two products have different approaches, and they reflect the different personalities of the two vendors. In general, Oracle products are designed for very professional development efforts by top-notch programmers and project leaders. The learning period is fairly long, and the solution is pricey; but if you stick it out you will ultimately have greater scalability and greater reliability.If your project has tight deadlines and you don’t have the time and/or money to hire a team of very expensive, very experienced developers, you may find that the Oracle solutioni s an easy way to get yourself in trouble. There’s nothing worse than a poorly developed Oracle application.What Microsoft offers is a solution that’s aimed at rapid development and low-cost implementation. The tools are cheaper, the servers you’ll run it on are cheaper, and the developers you need will be cheaper. Choosing SQL Sever and Visual Studio is an excellent way to start fast.Of course, there are trade-offs. The key problem I have with Visual Studio and SQL Server is that you’ll be tied to Microso ft operating systems and Intel hardware. If the day comes when you need to support hundreds of thousands of users, you really don’t have anywhere to go other than buying hundreds of servers, which is a management nightmare.If you go with the Microsoft approach, it sounds like you may not need more than Visual Interdev. If you already know that you’re going to be developing ActiveX components in Visual Basic or Visual C++, that’s warning sign that maybe you should look at the Oracle solution more closely.I want to emphasize that, although these platforms have their relative strengths and weaknesses, if you do it right you can build a world-class application on either one. So if you have an organizational bias toward one of the vendors, by all means go with it. If you’re starting out from scratch, you’re going to have to ask yourself whether your organization leans more toward perfectionism or pragmatism, and realize that both “isms” have their faults.数据库管理数据库(有时拼成Database)也称为电子数据库,是指由计算机特别组织的快速查找和检索的任意的数据或信息集合。

外文翻译原文

外文翻译原文

IntroductionLatvian legislation for forest protection belts Latvian legislation demands that forest protection belts are established around all cities and towns. The concept of protection belts originates from the Soviet Era and is maintained in Latvian legislation despite the radical changes to the political system after regaining indepen-dence in 1991. The legal background for the establish-ment of protection belts is as follows:•Law on Protection Belts (1997, 2002)•Forest Law (2000)•Law on Planning of Territorial Development (1998).Designating a greenbelt around the city of Riga, LatviaJanis DonisLatvian State Forestry Research Institute ‘Silava’, Salaspils, LatviaAbstract: Latvian legislation demands that forest protection belts are established around all cities and towns. The main goal of a protection belt is to provide suitable opportuni-ties for recreation to urban dwellers and to minimise any negative impacts caused by urban areas on the surrounding environment. Legislation states the main principles to be adopted, which include the maximum area of protection belts, their integration in terri-torial development plans and restrictions placed on forest management activities. The largest part of the forest area around Riga is owned by the municipality of Riga, which, as a result, has two competing interests: to satisfy the recreational needs of the inhabitants of Riga, and to maximise the income from its property. In order to compile sufficient background information to solve this problem, the Board of Forests of Riga Municipality initiated the preparation of a proposal for the designation of a new protection belt.The proposal was based on the development and application of a theoretical framework developed during the 1980s. The analysis of the recreational value of the forest (5 class-es of attractiveness) was carried out based on categories of forest type, dominant tree species, dominant age, stand density, distance from urban areas and the presence of at-tractive objects. Information was derived from forest inventory databases, digital forest maps and topographic maps. Additional information was digitised and processed using ArcView GIS 3.2. Local foresters were asked about the recreation factors unique to differ-ent locations, such as the number of visitors and the main recreation activities. From a recreational point of view and taking into account legal restrictions and development plans for the Riga region, it was proposed to create three types of zones in the forest: a protection belt, visually sensitive areas and non-restricted areas.Key words:greenbelt forest, recreational value, GIS, zoningThe Law on Protection Belts states that protection belts around cities (with forests as part of a green zone)have to be established (a) to provide suitable conditions for recreation and the improvement of the health of urban dwellers, and (b) to minimise the negative im-pact of urban areas on the surrounding environment.Urban For.Urban Green.2 (2003):031–0391618-8667/03/02/01-031 $ 15.00/0Address for correspondence:Latvian State Forestry Re-search Institute ‘Silava’, Rı¯gas iela 111, Salaspils, LV-2169,Latvia. E-mail: donis@silava.lv© Urban & Fischer Verlaghttp://www.urbanfischer.de/journals/ufugRegulation nr 263 (19.06.2001) on the ‘Methodology for the establishment of forest protection belts around towns’issued by the Cabinet of Ministers (CM) states: (a) The area of a protection belt depends on the numberof inhabitants in the town: towns with up to 10,000 inhabitants should have a maximum of 100 ha of protection belt, those with between 10,000 and 100,000 inhabitants a maximum of 1,500 ha, and towns with more than 100,000 inhabitants a maxi-mum of 15,000 ha;(b) the borders of protection belts have to be able to beidentifiable on the ground, using features such as roads, ditches, power lines, and so forth;(c) protection belts have to be recorded in the territorialplans of regions adjacent to the town or city; and (d) establishment of protection belts has to be agreedupon by local municipalities.According to law, protection belts should be man-aged using adapted silvicultural measures. Clear-cut-ting, for example, is prohibited in a protection belt to mitigate any negative impacts of the city on the sur-rounding environment. The Forest Law of 2000 and subsequent regulations including the Regulation on Cutting of Trees, and the Regulation on Nature Conser-vation in Forestry define clear-cuts as felled areas larg-er than 0.1 ha where the basal area is reduced below a critical level in one year. These regulations also state the permitted intensity and periodicity of selective cut-ting (30–50%, at least 5 years between entries).The third element of the legal framework relevant for protection belts in Latvia is the Law on Planning of Territorial Development (1998). It defines:(a) Principles and responsibilities of the different or-ganisations involved;(b) the contents of territorial plans;(c) the procedures for public hearing; and(d) the procedures for the acceptance of plans.The law also states that protection belts around towns have to be designated in territorial plans. Thus, the legislation gives very detailed descriptions of the restrictions to maximum area, activities and guidelines for delineation and so forth, while there are no ‘rules’for the choice of what areas are to be included in pro-tection belts. It is up to territorial planners to propose what areas to include and for negotiation among mu-nicipalities to approve the selection.Protection belt for the city of RigaRiga and the Riga region are situated in the Coastal Lowland of Latvia within the Gulf of Riga. The main landform types are the Baltic Ice Lake plain, the Litto-rina Sea plain and the Limnoglacial plain and bog plain. The total area of the administrative area of the City of Riga covers 307.2 km2, and that of the Riga re-gion 3,059 km2. In 2000 the city of Riga had 815,000 inhabitants, while an additional 145,000 people resided in the greater Riga region. During the last decade the number of inhabitants in Riga decreased by 10.5%and in Riga region by 5.3%. In the mid-1990s the main types of industry in Riga were food processing, timber and wood processing, metal fabricating and engineer-ing, while in the region agriculture and forestry, wood processing, pharmaceuticals, and the power industry were the main activities. Due to reduced industrial ac-tivities today, the main sources of pollution in Riga re-gion are road transport and households.The greater part of the Riga region is covered by for-est, i.e. 1,642 km2or 53%. About 26% of the land is used for agriculture, 4% is covered by bogs, and 4% by water. The Riga region also has a coastal dune zone of some 30 km along the Gulf of Riga. The main tree species to be found in the Riga region are Scots pine (Pinus sylvestris L.),birch (Betula spp.) and Norway spruce (Picea abies (L.) Karsten) (see Table 1). In the administrative area of the city of Riga, 57 km2 or about 19% of the land area is forest. Scots pine is the domi-nant species, covering approx. 46.9 km2(i.e. 88% of the total forest area).According to the legislation described before, a pro-tection belt around Riga city, with a maximum size of 15,000 ha, could be designated. Moreover, any propos-al has to be agreed upon among 24 local municipalities. The Riga region is divided into 24 administrative units: 7 towns and 17 pagasts or ‘parishes’.Riga municipality currently owns more than 55,600 ha of forests. Most are situated in the vicinity of Riga. Four forest administrative districts lie completely with-in Riga region and close to Riga city (see Fig. 1). The total area of these districts is 44,158 ha out of which forest stands cover 36,064 ha (82%). Thus the Riga municipality forests of those 4 districts cover only 17% of the total forest area of the Region. The dominant tree species in the municipally owned forests are Scots32J.Donis:Designating a greenbelt around the city of Riga,LatviaUrban For.Urban Green.2 (2003)Table 1.Tree species composition in the Riga region Dominant tree Area covered, ha Average age, years species––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––Total Municipa-Total Municipa-lity*lity* Scots pine95,27627,3718581 Norway spruce20,8493,0175139Birch30,5585,1246056 Other10,438552––Total157,12136,0647369*Data only for the 4 forest districts of the Riga city munici-pality that are entirely situated within the Riga region.pine, birch and Norway spruce. These cover 76%, re-spectively 14% and 8% of the forest area. Other species cover less than 2% of the area.Until the re-establishment of Latvian independence almost all forestland was owned by the state but since then many areas have been returned to their former owners and are now privately owned. Current regula-tions state that until the designation of new boundaries for protection belts has been agreed upon, all forests of the previously existing and protected green zone have to remain protected whatever their functional role or ownership status. Consequently almost all forests of the Riga municipality located in the Riga region have management restrictions placed on them, and the same can be said for forests of other owners within the previ-ously existing green zone. Currently, therefore, on the one hand significant recreation opportunities for urban dwellers are provided, while on the other hand forest owners’rights to obtain income from timber harvest in the suburban areas continue to be restricted. Suburban municipalities also lose income because of reduced land taxes from land with management restrictions.The board of Forests of the Municipality of Riga there-fore initiated the preparation of a proposal to designate a new protection belt.Study to support protection belt designation The main objective of the study presented here has been to obtain background information in preparation for further discussions with local municipalities. Stud-ies in Latvia as well as elsewhere have revealed that recreational values of forests depend mainly on forest characteristics, location and level of pollution (Emsis et al. 1979; Emsis 1989; Holgen et al. 2000; Lindhagen & Hörnsten 2000; Rieps ˇas 1994; Su ¯na 1973, 1979). A very important aspect is the distance to the forest from places where people live (e.g. Rieps ˇas 1994). The abil-ity of a forest stand to purify the air by filtering or ab-sorbing dust, micro-organisms, and noxious gases de-pends on tree and shrub species composition, age, tree size and stand density (Emsis 1989). Stands purify the air most effectively at the time of maximum current an-nual volume increment, usually between 30 to 60 years of age in Latvian conditions, depending on species.Recreational value, on the other hand, increases with age (and tree size) and reaches its maximum consider-ably later. Taking into account the peculiarities of the dispersal of pollution as described by Laivin ‚s ˇ et al.(1993) and Za ¯lı¯tis (1993), selective cutting is prefer-able in the vicinity of a pollution source, especially ifJ.Donis:Designating a greenbelt around the city of Riga,Latvia 33Urban For.Urban Green.2 (2003)Fig. 1.Location ofthe Riga municipali-ty forests in the Riga region.the forest consists of a narrow strip between the pollu-tion source and housing. If the distance between a pol-lution source and housing exceeds several kilometres, a patch clear-cut system with stands of different ages is sufficient to provide a reduction in the negative impact of urban areas. Taking into account the fact that closer to residential areas it is more important to consider the visual qualities of the forest (e.g. Tyrväinen et al. 2003), this purification ability can generally be ignored when planning protection belts.MethodsThis study to support the designating of the Riga pro-tection belt used the following data sources for analysis (see Fig. 2): forest inventory databases, digital forest maps of the Riga municipal forests which are situated outside the administrative borders of the city (55,600 ha of which 44,158 ha located in the Riga region) (see Fig. 1), and corresponding topographic maps.The study and its developed proposal are based on an application of a theoretical approach developed during the 1980s by the Latvian State Forestry Research Insti-tute ‘Silava’(Emsis 1989) and the Lithuanian Forestry Research Institute (Riepsˇas 1994). According to the methodology developed by Emsis (1989), the first step in the process is to evaluate the recreational potential of the forest stands. This is carried out by analysing the following factors:• The tolerance of the forest ecosystem to different lev-els of anthropogenic (recreation) loading;• the status of forest ecosystems in terms of the damage or degradation as a result of recreational use;•the suitability of the landscape for non-utilitarian recreation (recreational value); and• the existing and potential levels of recreational loads.The second step involves evaluating the existing andexpected functional roles of the forest.The tolerance of the forest ecosystem to different levels of anthropogenic impact or loading is evaluated using a framework based on a combination of forest type, dominant tree species, dominant age group, soil type and relief, according to the stability of ecosystem. All stands are classified into one of five tolerance classes. The highest score is given to mature deciduous forests on mesotrophic and mesic soils on flat topogra-phy, while the lowest score is given to young pine stands on oligotrophic soils on steep slopes (forests on dunes).In this study ecosystem tolerance could not be evalu-ated, as it was primarily a desk using existing databas-es, and topographic relief maps were not available in digital form. The status of the forest ecosystem in rela-tion to damage or degradation was evaluated in terms of the degree of change in vegetation cover, under-growth, tree root exposure of the and level of littering, classified into three classes.Assessment of the recreational value of the forest stands was calculated using a formula developed by Riepsˇas (1994):Recreational value VR= (VS*kW*kS+VA)*kPWhere VSis stand suitability based on key internal at-tributes of the stand, such as species, age, stand densityand forest type. VSvalues range from 0 for young, high-density grey alder (Alnus incana L.) on wet peat soils, to 100 for average density mature pine stands ondry mineral soils. kwis a coefficient depending on the distance of the stand from watercourses, ranging from0.1 for stands further than 2 km from watercourses to1.0 for stands up to 500 m from watercourses. kSis a coefficient depending on the distance of the stand from urban areas, ranging from 0.1 for stands further than34J.Donis:Designating a greenbelt around the city of Riga,LatviaUrban For.Urban Green.2 (2003)Fig. 2.Structure of data sources used in data ana-lysis.80 km from Riga to 1.0 for stands within 30 km ofRiga. VA is an additional value depending on the pres-ence of attractive features, for example, 25 for forest stands up to 500 m from settlements, including summer cottages, or for areas intensively used for recreation ac-cording to information of local foresters. kP is a coeffi-cient depending on the level of environmental pollu-tion. Its value is 0 if the actual pollution level exceeds limit values, 0.5 if the level of environment pollution is between 50% and 100% of limit values, and 1 if the level of actual pollution is less than 50% of the limit values. In this study a coefficient of 1.0 was used, be-cause SO2and O3concentrations measured by Rigabackground measuring stations did not exceed 50% of the limit values (Fammler et al. 2000).The division of stands into classes of stand suitabili-ty is based on studies of visitors’preferences. Coeffi-cients kw, ksand VAare based on visitors’spatial distri-bution and show the ratio of the number of visitors in different zones. The evaluation of existing and expect-ed recreational loads was carried out by local foresters. They marked existing and potential recreation places on forest maps, including:•Small areas or sites for activities such as swimming, barbecuing, and so forth.•Recreation territories, defined as areas of 20 ha or more where people stay longer periods for walking, jogging, skiing or other forms of both active and pas-sive recreation.•Traditionally popular places for the collection of berries and mushrooms.•Recreational routes, including routes from public transport stops to recreation sites or recreation terri-tories, and between recreation sites and territories. For each recreation site and recreation territory data on the main seasons of use, the periods of use (week-days, weekends), and the average number of people in ‘rush-hours’during good weather conditions was col-lected or estimated.Data processing was carried out using ArcView GIS3.2a, Visual Fox pro and Microsoft Excel. VS values foreach stand were calculated from information in the for-est database using Visual Fox pro. Information collect-ed at a later stage from local foresters was digitised using separate themes (layers) in ArcView GIS 3.2a. Buffer zones along watercourses and water bodies, as well as residential areas, recreation sites and territoriesand recreation routes were created to get kW ,kSand VAvalues for each stand. Then VR values were calculatedfor each stand.A selection of recreation sites and territories was vis-ited by members of the project team in order to evalu-ate the state of the ecosystem with respect to wear and tear arising from different levels of recreational use. An evaluation of the existing functional role of each forest stand was carried out using the existing categories offorest protection. The anticipated future functional role was evaluated by annalysing the recreational value of stands, known expectations in terms of territorial de-velopment, and existing legal restrictions in order to find a compromise between recreation possibilities and other services of the forest. Next, a first draft of the protection belt was drawn according to experts’judge-ment. This draft included forests with high recreational value adjacent to residential areas and summer cot-tages, and larger tracts intensively used for recreation with medium to high recreational value.ResultsAccording to the original forest classification 65% of the total forest land area was designated as a commer-cial greenbelt forest, for which the main management goals are timber production and environmental consid-erations. The remaining 35% were designated as pro-tected (see Table 2). With regards to protected areas in Latvia: the main management goals of nature parks are nature conservation and recreation, including some ed-ucation. The goal for nature reserves is nature conser-vation, while that of the protected greenbelt forests is recreation.While interviewing local foresters it was revealed that they find it difficult to evaluate dispersed recreation loads (for example collection of berries, mushrooms). The assessments of foresters varied greatly and were considered to be unreliable. It was therefore decided to map only the places important for recreation, but not to use the inaccurate estimates of visitor numbers.In Latvia, special investigations have to be carried out in order to develop management objectives and principles for protected forests as part of the preparation of management plans. Pilot studies and visits to some of the recreation areas have revealed that the evaluation of the state of the forest ecosystem is useful only when de-veloping the detailed management plan. Even then, this is only the case for places identified by local foresters as recreation sites or territories, because otherwise it is too time consuming to carry out fieldwork which provides little useful additional information.Calculated VSvalues show that on average the forests studied have a medium suitability value for recreation (average score 47) (see Table 2). There are considerable differences between districts, with aver-age value ranging from 32 points in Olaine to 66 points in the Garkalne district. This indicates that the average stands in the Garkalne district are more suitable for recreation than those in other districts. If other aspects are taken into account, such as distance from wherepeople live, and VRvalues are calculated it can be seenJ.Donis:Designating a greenbelt around the city of Riga,Latvia35Urban For.Urban Green.2 (2003)that the districts are still ranked as follows: Garkalne,Jugla, Tireli and Olaine.Only 10% of the forest owned by Riga municipality within the Riga region were evaluated as having a high or very high recreational value. 12% had medium recreational value, while large areas used for the col-lection of berries and mushrooms were evaluated as having low or very low recreational value (60% of the total forest area) (see Table 3).More than 16% of the area is covered by bogs, for which according to the used methodology, recreational value was not evaluated at all. Some areas were recorded by the local foresters as important places for the collec-tion of berries. However, more valuable from a recre-ational point of view were those forests situated east and north-east of the city (Garkalne and Jugla districts),while the forests to the south (Olaine and Tireli districts)were found to have a lower recreational value (V R ).36J.Donis:Designating a greenbelt around the city of Riga,LatviaUrban For.Urban Green.2 (2003)Table 2.Distribution of forest by forest categories according to the original functional role Forest districtDataFormer forest category Total–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––Commercial Nature Nature Protected greenbelt forests parks reserves greenbelt forestsGarkalneArea, ha521.27,698.78,219.9Average of V S *61.966.566.2Average of V R **59.350.751.4JuglaArea, ha 8,376.74,098.812,475.4Average of V S 45.656.949.1Average of V R 22.034.025.7OlaineArea, ha 11,765.4707.512,473.0Average of V S 31.941.032.6Average of V R 8.527.410.0TireliArea, ha 8,689.5257.91,025.01,016.910,989.3Average of V S 40.666.710.059.342.3Average of V R 17.055.3 1.044.920.6TotalArea, ha 28,831.6779.11,025.013,522.044,157.6Average of V S 39.863.510.061.647.1Average of V R16.357.91.043.725.9* V S Suitability value – based on stand parameters (0–100 points).** V R Recreation value (0–125 points) based on stand parameters, distance to the residential areas, water and other attractive objects.Table 3.Distribution of forest areas by classes of attractiveness and by designated functional role Designated zoneDataClass of attractiveness Total –––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––n.a.Very low Low Medium High Very high 0<2525,1–5051–7575–100100<Protection belt Area, ha76.7560.12,266.42,222.7850.5743.66719.9Average of V R *0.012.036.063.390.0125.053.4Visually sensitive Area, ha 447.64,150.54,157.7853.4847.1179.810636.1Average of V R 0.07.837.460.996.7125.028.5Non-restricted Area, ha 6,664.715,389.12,548.61,090.5874.8234.026801.7Average of V R 0.0 5.234.761.197.2125.015.8TotalArea, ha 7,189.020,099.88,972.74,166.52,572.31,157.344157.6Average of V R0.06.236.362.294.6125.025.9*V R Recreation value (0–125 points) based on stand parameters, distance to the residential areas, water and other attractive objects.Areas along main roads and railways are known to be visually sensitive, because of the large number of peo-ple who can see them during travel. The same is true for forest in the vicinity of small villages. Taking into ac-count the fact that legislation prohibits clear-cuts in pro-tection belts – which is not always necessary in order to maintain the visual quality of the landscape – it was proposed, as part of the zoning strategy, to create so called visually sensitive areas. In these areas the forest owner (Riga municipality) is recommended to use more detailed landscape-planning techniques and to pay more attention to visual aspects during management.As a result of the study, seen from a recreational point of view and taking into account legal restrictions and so forth, it has been proposed to create three zoning categories: (1) protection belts, (2) visually-sensitive areas, and (3) non-restricted areas (see Fig. 3). The protection belt should include:• Forest with high recreational value adjacent to residen-tial areas and summer cottages, to form a 200–500 m wide belt.• Larger tracts of forestland intensively used for recre-ation.The zone of visually-sensitive areas should include:• Forests within the administrative borders of Riga mu-nicipality and in the vicinity of villages (up to 200–500 m distance).• Forests along roads of national and regional impor-tance, railways, watercourses and streams as a protec-tion belt of 100–300 m wide.• Places used for mushroom and berry collection in the original restricted protection belt.• Places that could become important for recreation in the near future.J.Donis:Designating a greenbelt around the city of Riga,Latvia 37Urban For.Urban Green.2 (2003)Table 4.Proposed distribution of forest categories in designated zones (in hectares)Designated zoneFormer forest category Grand Total––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––Commercial Nature Nature Protected greenbelt forests parks reserves greenbelt forests Protection belt355.2779.15,585.76,719.9Visually sensitive areas 3,503.97,132.110,636.1Non-restricted areas 24,972.51,025.0*804.226,801.7Total 28,831.6779.11,025.013,522.044,157.6*Forests within nature reserves are not intended for recreation; their primary management goal is nature conservation.Fig. 3.Proposal for zon-ing of the Riga municipalforests in Riga region.The remaining areas should consequently be classi-fied as non-restricted areas.A revision of the first draft plan was made taking into account the known prospective development plans of Riga and Riga region. As a result, for forests owned by Riga municipality and located in Riga region the pro-posal is to include 6,720 ha in the protection belt (see Table 3). Moreover, it has been suggested to designate 10,636 ha as visually-sensitive areas, but to omit the re-maining 26,802 ha from zoning, as these do not need special management from a recreation point of view. Average recreational values of stands in this area range from 53 (medium), through 28 (low) to 15 points (very low) respectively.As a result, the major part of the forest remains in the same functional category as in the original allocation (see Table 4). As was mentioned above, the classifica-tion described here is only based on recreational as-pects, thus forests in nature reserves are misleadingly shown as non-restricted forests. Only 5,586 ha out of the 13,500 thousand ha of the originally protected greenbelt forests are proposed to be included in the protection belt, while 355 ha of the previous commer-cial greenbelt forests are proposed to be placed under stronger protection.DiscussionForests owned by Riga municipality within the Riga re-gion are divided over 13 rural municipalities. Accord-ing to legislation, revised draft proposals for zoning Riga city forests have to be accepted by Riga munici-pality, while the final decision is up to Riga and the sur-rounding municipalities. The study presented here has provided a tentative estimate of the recreational value and suitability of the forests for recreation and can be used as a starting point for political discussions. At the very beginning the intention was to divide the forests in two categories: the protection belt and the remainder of the forest. During the study it was concluded, however, that a third category would be needed, that of visually sensitive areas. Within this category more attention would have to be paid to the amenity of the landscape, but there would be no need to drastically restrict com-mercial forest management. As nature parks are also designated for recreation, it has been proposed to in-clude all forests of nature parks in the protection belt. It has to be noted that all the forests within the adminis-trative borders of cities, and as such not included in this study, are designated as protected. As a consequence, the forest area available for recreation to the inhabi-tants of Riga would increase to 12,500 ha.Unlike many other European cities, where timber ex-traction is of small importance (Konijnendijk 1999),Riga municipal forests have a considerable economic role. It is estimated that the allowable annual cut in suburban forests amounts to 169,800 m3or 81% of the annual increment (Dubrovskis et al. 2002). It should be kept in mind that income from logging is used for for-est regeneration and tending, forest fire protection and maintenance of recreation facilities.The objective of this study was not to evaluate the precision of the method nor possible errors occurring when applying it. This study revealed, however, the in-completeness of the methodology used. Bogs, which are very sensitive to recreation loads, are ascribed quite a high level of attractiveness from a recreation point of view (for the collection of wild berries), but according to the methodology they are not evaluated at all. All watercourses were assumed to be attractive sites, while the preliminary evaluation of recreation loads showed this not to be true. The use of watercourses is very vari-able and obviously depends on water quality and vege-tation structure of the edges or banks. Another aspect which was not taken into account was that amenity of a forest is not simply the sum of the amenity values of forest stands (Pukkala et al. 1995).It seems that the evaluation based on dominant species is appropriate for screening areas, but for more detailed management plans, species mixture, the number of forest layers, and principles of landscape architecture also have to be taken into account (Bell 1999; Bell & Nikodemus 2000). Various studies have shown that people prefer uneven-aged forests (e.g. Melluma et al. 1982) and uneven-aged stands (e.g. Riepsˇas 1994). The impacts of the screening effect show that there are, even in the visually-sensitive and commercial zones, considerable areas with high and very high recreational value. This is mainly because delineation of zonal boundaries is carried out using easily distinguishable natural lines, and often it is not worth including single stands of high recreational value in the protection belt if, as a consequence, re-strictions on management would be placed over whole compartments of 50 ha.For the preparation of specific management guide-lines detailed field inventories have to be carried out. This has not been done in this study, where more re-liance was placed on the experience of local foresters and existing databases. Detailed economical calcula-tions have yet to be carried out in order to evaluate the direct and indirect value of the forest. These will also assist in obtaining more background information to be used as part of a holistic approach and for development of a decision support system to resolve contradictions between different interest groups.After acceptance of the draft plan by the municipali-ty of Riga, the process of negotiation between Riga and its surrounding municipalities is currently ongoing.38J.Donis:Designating a greenbelt around the city of Riga,Latvia Urban For.Urban Green.2 (2003)。

外文翻译

外文翻译

Design based on HDB3 encoder of EDA technology and realizingSummaryHDB3 yard is one of the important components in digital baseband communication system, because it does not have direct-flow compositions, it is strong to examine the ability by mistake, have advantages such as performance of clock recovery, etc, recommend the baseband that uses to transmit one of the yard types as ITU. Have introduced principle and method of HDB3 code at first, has proposed a method based on HDB3 encoder of EDA technology, have simple, with low costs circuit, development period is short, it is high to carry out the speed, upgrade characteristics such as convenience, etc.ForewordThird-order high-density bipolar code is an important serial data transmission encoding, digital communication is an important part of the system. And the most common NRZ code, compared, HDB3 code has many advantages, such as: eliminating the DC component NRZ code with clock recovery and better anti-jamming performance, making it more suitable for long-distance channel transmission. At the same time, HDB3 error detection code has a strong ability to use HDB3 code when the data transfer sequence, if a single bit error occurs during transmission, the law of alternating polarity will be destroyed, so the receiver HDB3 code based on the unique law characteristics, can be detected the error and correct the error, and facilitate the extraction of HDB3 code bit timing information. HDB3 code as data transmission and thus a pattern, widely used, as ITU recommended pattern one. HDB3 coding performed by the realization of a variety of ways, the common solution is application-specific transceiver chip HDB3, such as the selection of specific E1 transceiver and MCU DS2153Q the conversion of the code system. This article provides a the use of modern EDA technology to ACEX series FPGA chip EPlK10 for the hardware platform for the Quartus II software platform to VHDL, for the development of tools for FPGA implementation of the HDB3 encoder design.HDB3 yard High Density Bip01ar Code of three codes, a pair of polarity yard of high density for three steps It is an important code way of serial data transmission, it is one of the important components in the digital communication system too. And most frequently used NRZ yard Non-Return Zero, does not return zero yard Compare, HDB3 yard has a lot of advantages, for example: Dispel NRZ direct-flow composition of yard, have clock recoveryand better interference-free performance, this makes it suitable for the channel of long distance to transmit. Meanwhile, HDB3 yard has more strongly examining the ability by mistake, when the data array is transmitted with HDB3 yard, if present yard singly by mistake in the transmission course, its polarity will change the law alternatively and will be destroyed, therefore is receiving the end according to one yard of this unique law characteristics of HDB3, can examine and make mistakes and correct the mistake, one yard of convenience of HDB3 drew the regular information in the location at the same time. Therefore one yard of a kind of code types as data transmission of HDB3, it is extensive to employ, become one of the yard types that ITU recommends using. There are multiple channels in the realization of HDB3 one yard of compiled code devices, commonly used solutions are to employ specialized HDB3 to receive and dispatch the chip, specialized E1 receives and dispatches chip DS2153Q and one-chip computer and realizes this yard of conversion function made such as selecting for use. This text offers one kind to utilize modern EDA technology, regard ACEX series FPGA chip EPlK10 as the hardware platform, regard Quartus II as the software platform, with VHDL, it is a developing instrument, the design plan of HDB3 encoder that suitable FPGA realizes.1 Code rule of HDB3 yardThe code rule of HDB3 yard is as follows:(1)Vary the news code into AMI yard;AMI yard Alternate Mark Inversion Full name to spread number, overturn yard alternatively. This one kind encodes code 0 and 1 of news according to the following rule: Last yard 0 code 0 still, and at code if you can‟t t urn into, transmit alternative by that yard to 1 1, -1, 1, -l;(2)Check the intersection of AMI and connecting 0 situation with in the yard, as 4 or more of having connect 0 bunches with, keep the form of AMI not changing; Appear 4 or more connect 0 with, 0 turn 4th after the 1 into until the first one the intersection of O and yard With the symbol of polarity, show n is own is V, it is – V – n is own with V;(3)Check whether not 0 yards of numbers among adjacent v yard is an even number, if is the even number, again present V yard the first one the first 0 yard later turn by B yard B into for 0 times, and is a the first one is the polarities of yard opposite of O the polarities of B, and make not 0 yards behind begin to replace the change from V yard.NRZ one yard of course changed into HDB3 yard such as Table 1 shown for example.2 Modeling and realizing of HDB3 encoderGo on data that encode according to encode the principle to convert to AMI yard first while being above-mentioned directly, then go on, add the intersection of V and yard, add the intersection of B and yard, operate, will find, transform the intersection of AMI and yards of one …the 1‟ occasionally into …one 1‟Yards of course that polarity form, but after adding B yard and operating, only if zero yuans of corresponding polarity might overturn, so there are two pieces of course that signal polarity produces.Analyze the code result of HDB3: V positive to shoulder not alternative in polarity of yard, remaining 1 and the intersection of B and yard regard as until an organic whole positive to shoulder not alternative too, meet the intersection of V and polarity with the intersection of zero and identical polarity of in the front of yard at the same time. Therefore has produced the thinking that use FPGA carries on HDB3 one yard of codes: Go on and add V yard first, adds B yard and operates, in this course, wouldn‟t consider its polarity, then the intersection of V and yard, 1 divide two into with the intersection of B and yard, carry on polar variety come on one realize respectively. So can raise the efficiency of the system, the decrease system delays time at the same time.The digital circuit part of HDB3 encoder is made up of three pieces of module: V yard produced the unit V Gen ,B yard produced the unit B Gen ,A pair of polar conversion units single2double of single polarity ,Their structure charts.2. 1 V yard produced the unit V_GenV one yard of functions of producing the unit is to connect four in the news code with 0 bunches of detection in fact, namely when connecting with 0 bunches four, vary, succeed V yard fourth 0, but otherwise, keep the former state of the news code exporting. For offer the convenience to encoding the course, transmit yard, say with 2 binary scale one the intersection of code and yuan in the original signal, while going on with V yard, use…11‟ in unison Annotate it, original l yard uses …01‟ Annotate, 0 yards use …00‟Annotate. Fig. 2 shows for V one yard of job flow diagrams which produces the unit.The original signal NRZ_in produced the unit V_Gen through V yard And then signal V_Gen_out wave form:2. 2 B yard produced the unit B_GenB one yard of functions of producing the unit is to guarantee the additional V array after yard is not destroyed…Polarity overturns alt ernatively‟Direct-flow characteristic does not formed, namely when there are a piece of not 0 yards of even number between adjacent V yard, after one is small for that section if you can‟t vary as, destroy by symbol a B of yardseach to the first times 0. So, while judging whether some one 0 should be turned into B, should guarantee at first thereafter code yuan of third are one yard of yuan of V, so must until each go on, store temporarily at present, it waits for to be thereafter third the intersection of code and arrival of yuan. For realize purpose this, at first each insert V punish Put into the displacement register of 3 for one, under the function of the synchronous clock, whether add the judgment of B yard at the same time, when yard of yuan are from shifting to come out in the register, can determine to vary into B yard, shine the original yard of outputs. Fig. 4 shows for B one yard of job flow diagrams which produces the unit.The signal V_Gen_out produced the unit B_Gen through B yard after adding V And then signal B_Gen_out wave form.2. 3 form polarity – one pair of polar conversion units single 2 doubleAccording to the code rule of HDB3, we can know, the polarity of V yard is positive defeated by the alternative one, remaining 1 and the intersection of B and yard regard as until an organic whole and positive to shoulder not alternative, meet the intersection of V and polarity with the intersection of zero and identical polarity of in the front of yard at the same time. Therefore we can carry on separately polar variety of it to realize. Know from the procedure of the front,…V‟, …B‟, …1‟ Have already used one pair of phases yard separately …11‟, …10‟, …01‟Annotate it, …0‟Use …00‟Annotate, so we can realize very easily through the following procedures. Fig. 5 shows for the job flow diagrams of a pair of polar conversion units of single polarity.Through a pair of polar transformation units of single polarity, 1 including …1‟, …V‟, …B‟Use 2 binary scale yard …01‟ Show – 1 …the 1‟…the V‟…the B‟ Use 2 binary scale yard …11‟ Show, 0 use 2 the intersection of binary scale and yards of …the 00‟Show, the advantage encoded like this is, when we regard two high positions of yard of binary scale that the code transform into as having sign bit that the symbol counts, …O1‟, …11‟ , …00‟ Correspond to 1, – 1, 0 separately. Help us observe the artificial result like this. The signal B_Gen_out passes a pair of polar conversion units single2double of single polarity after adding B And then signal Code out wave form.Single 3 / pairs of polar hardware circuit of varietyDownload the above-mentioned procedure to the programming device, the code result produced is one pair of level signals of single polarity. This signal is not real HDB3 yard yet, need to be above-mentioned to encode to convert to …1‟…the 1‟ , …0‟ Level changes the wave form, but work to depend on the digital circuit can‟t be finished simply here. The directness way of comparison, utilize the code result, control many way simulation selector switches to realize, 4 selects a simulation selector switch CD4052 of the way such as utilizing pair, theirtables of function are shown in Table 2.Utilize many ways to imitate the selector switch CD4052 and realize the circuit connection diagram that level changed, HDB3_out is that standard HDB3 yard formed finally flows in the picture.3 conclusionsEDA is a kind of industrial production technology, use the programmable chip based on that the hardware describes the language and can describe the hardware to the relevant circuit in the communication system while developing technology in practice, then realize the digital communication system with CPLD/ FPGA and combine the design cycle that electronic design automation and artificial technology of the circuit can narrow the products at the same time, reduce the mistake that may happen, improve development benefit of the communication products.Practice show, use FPGA come, realize the intersection of NRZ and yard to the intersection of HDB3 and conversion of yard than adopt the specialized integrated circuit debug and bring convenience, defect of overcoming the interference-free difference that the circuit of the discrete hardware brings and difficult to adjust etc., it is short, with low costs and have software development period, it is high to carry out the speed, the real-time character is strong, upgrade characteristics such as convenience, etc. And can integrate this circuit and its decoding circuit and other functions circuit in the same FPGA chip, having reduced the number of connecting the component, has improved the integrated level, and there is very great programming flexibility, very strong transplantation, so there is very good application prospect.基于EDA技术的HDB3编码器的设计与实现摘要HDB3码是数字基带通信系统的重要组成部分之一,因为它没有直流组成,功能强大,有纠错能力,具有时钟恢复等性能优势,是ITU建议使用的基带类传输码型之一。

英文翻译 附原文

英文翻译 附原文

本科毕业设计(论文) 外文翻译(附外文原文)系 ( 院 ):资源与环境工程系课题名称:英文翻译专业(方向):环境工程班级:2004-1班学生:3040106119指导教师:刘辉利副教授日期:2008年4月20使用褐煤(一种低成本吸附剂)从酸性矿物废水中去除和回收金属离子a. 美国, 大学公园, PA 16802, 宾夕法尼亚州立大学, 能源部和Geo 环境工程学.b. 印度第80号邮箱, Mahatma Gandhi ・Marg, Lucknow 226001, 工业毒素学研究中心, 环境化学分部,于2006 年5月6 日网上获得,2006 年4月24 日接受,2006 年3月19 日;校正,2006 年2月15 日接收。

摘要酸性矿物废水(AMD), 是一个长期的重大环境问题,起因于钢硫铁矿的微生物在水和空气氧化作用, 买得起包含毒性金属离子的一种酸性解答。

这项研究的主要宗旨是通过使用褐煤(一种低成本吸附剂)从酸性矿水(AMD)中去除和回收金属离子。

褐煤已被用于酸性矿水排水AMD 的处理。

经研究其能吸附亚铁, 铁, 锰、锌和钙在multi-component 含水系统中。

研究通过在不同的酸碱度里进行以找出最适宜的酸碱度。

模拟工业条件进行酸性矿物废水处理, 所有研究被进行通过单一的并且设定多专栏流动模式。

空的床接触时间(EBCT) 模型被使用为了使吸附剂用量减到最小。

金属离子的回收并且吸附剂的再生成功地达到了使用0.1 M 硝酸不用分解塔器。

关键词:吸附; 重金属; 吸附; 褐煤; 酸性矿物废水处理; 固体废料再利用; 亚铁; 铁; 锰。

文章概述1. 介绍2. 材料和方法2.1. 化学制品、材料和设备3. 吸附步骤3.1. 酸碱度最佳化3.2. 固定床研究3.2.1 单一栏3.2.2 多栏4. 结果和讨论4.1. ZPC 和渗析特征4.2 酸碱度的影响4.3. Multi-component 固定吸附床4.3.1 褐煤使用率4.4. 吸附机制4.5. 解吸附作用研究5. 结论1. 介绍酸性矿物废水(AMD) 是一个严重的环境问题起因于硫化物矿物风化, 譬如硫铁矿(FeS2) 和它的同素异形体矿物(α-FeS) 。

英汉翻译教程教案

英汉翻译教程教案

英汉翻译教程教案一、翻译史:有语言就有翻译1. how long: about 2000 years西方:公元前3世纪2. 翻译高潮climax公元前四世纪:古希腊文化(三人用拉丁语)公元前四—六世纪:罗马帝国后期(中世纪),以宗教文献为主《圣经》—拉丁语中世纪后期(13-14世纪):巴格达成为研究古希腊文化的中心文艺复兴时期(14-16世纪):大量译著和翻译家二战以后,翻译范围扩大3.我国的翻译高潮1)东汉—唐宋:佛经翻译三大翻译家:玄奘:第一个鸠摩罗什:天然西域之语趣真谛2)明末清初:科学著作外文—中文3)五四前:严复、林纾等严复的翻译标准:faithfulness信expressiveness达elegance雅4)建国后初10年,毛、马、列著作—中文,苏联等社会主义国家的文学著作5)1978年后(改革开放):西方学术著作和文艺作品:中译外文,量少质劣二、What’s translation?三、可译性?1. 字的音和形法不可译Practice makes perfect. (押头韵)Able was I are I saw Elba. (拿破仑说)不到厄岛我不倒(通韵味,但乏对称性)2.直译和意译Armed to the teeth: fully armedStrike while iron is hot.以眼还眼,以牙还牙。

滴水穿石。

旧瓶装新油。

火上浇油。

t hrow one’s hat into ring 竞技莎士比亚《驯悍记》Your three inch fool三打一水浒3.意译Many kiss the b aby for the nurse’s sake. 醉翁之意不在酒。

I’m afraid she’s too far away from the cradle for you. 恐怕她对你来说太老了。

as sweet as a nut甜得像蜜一样He who wants to eat nut must first crack it.Until …… ambition…… 不到黄河不死心。

外文翻译

外文翻译

Green International Wine MarketingGreen International Wine MarketingMary Pugh & Richard FletcherAbstract The Banrock Station brand, owned by wine producer BRL Hardy, has been highly successful in the UK and USA, and in the Australian premium wine market. In part, success has arisen from the positive attributes of being a ‘new world’ wine, but the case study shows that it is branding as a ‘green’ wine that supports conservation activities that has given Banrock Station a distinctive edge. The experience of BRL Hardy points to a number of key lessons in international marketing that may help other companies break free from the competitive pack. Keywords: Wine marketing, green brands, international marketingIntroduction One of the major challenges facing Australian firms in the international marketplace is how to differentiate their products from those of competitors. This case explores the challenges facing BRL Hardy Ltd. of Australia and how they met the challenge in a global wine market that is highly competitive and characterised by multiple players, labels and products. Although Australia has captured only 5% of the world’s wine market, Australian wines are the fastest growing import category in key markets such as the UK and USA, stealing market share from traditional ‘old world’ wine producers such as France, Italy, Germany and Spain. Australia’s success to date stems not only from its comparative advantage of producing quality wines at reasonable prices, but the ability of Australian wine companies to build brands to compete internationally. This case study demonstrates BRL Hardy has identified a unique global market segment of a wine targeted at the environmentally conscious. The case covers the initial stages of the implementation of the strategy to position its BRL Hardy’s Banrock Station brand of wines in the environmentally conscious segment, through to a promotional program of ‘green’ international wine marketing. Background BRL Hardy Ltd. was formed after a 1992 merger ofSouth Australian-based wineries, Berri Renmano Ltd. and Thomas Hardy and Sons Pty Ltd. It is now one of the top four wine producers in Australia and one of the top 10 largest wine groups in the world. Its Banrock Station brand, produced from grapes mostly grown in the Riverland region of South Australia, is the rising star of the company’s wine portfolio. The first wine stock was produced as recently as 1995, and now production is 2.4 million cases a year. In 1994 BRL Hardy acquired Banrock Station with 250 hectares of good soil for producing premium grape varieties. The rest of the property is made up of 900 hectares of wetland and 600 hectares of protected Mallee Woodland eco system. The property was suffering from the impact of prolonged farming and grazing. BRL Hardy, together with Wetland Care Australia undertook a huge revegetation program to remove stock, install fish barriers and reintroduce natural wetting and drying cycles in the wetland. This has resulted in the native birds and fish, water plants, frogs, and insects returning to restore the health of the River Murray. The 250 hectares of new vineyard is used to produce five major wine varieties. As Figure 1 shows, red wines are more favoured than white wine varieties. The vineyard’s total yield per year is 5,000 tonnes which converts to 3,500,000 litres of wine or 380,000 cases. The additional tonnage required to meet domestic and export76Australasian Marketing Journal 10 (3), 2002Green International Wine MarketingWine Variety 20 33 43 48 59 0 20 No of Hectares 40 60Merlot Chardonnay Semillon Cabernet Sauvignon ShirazFigure 1: Banrock Station Major Wine Varieties (Source: BRL’s Banrock Station)demand of over two million cases comes from purchasing other grapes from local producers in the Riverland. Australia and the Global Wine Market Market conditions are ripe for Australian wine producers to increase exports. The ‘old world’ wine producers such as France and Italy, which have historically held a large market share of the global export market, are in decline. In 1997, France held 26% of export volume, Italy 23% and Spain 14%. In total these ‘old world’ producers represented 67% of the export wine market. However, it is the ‘new world’ wine producers such as Australia, New Zealand, Chile and South Africa who are experiencing growth. While only holding a relatively small market share of export volume, they are stealing share from the ‘old world’ producers. Following centuries of quality wine being associated with ‘old world’ wine producers, Australian wines are now at the forefront of a new consumer trend led by ‘new world’ producers – the supply of good quality, good value, ready to drink now, good tasting, fruity wines. As Table 1 shows, Australia is ranked Number 4 on exportvalue and is the market leader in ‘new world’ wines. Australia’s remarkable success in the UK market is being demonstrated by delivering wine products that are relevant to everyday living and enjoyed by all. The wine brand ‘Australia’ is leveraging the effect of country of origin image (Abmed & D’Astous 1996) in transferring favourable perceptions of quality fruit and a relaxed lifestyle to its food and wine. This positioning in the UK and USA markets has stimulated demand for ‘premium’ category wines (i.e., those that are categorised above basic ‘good quality/good value’ wines). Australian wine exports have grown substantially since the mid 1980s. At the end of the 2000/01 financial year, Australia exported 339 million litres which was a 17% increase on the previous year. The export market volume for Australian wine is projected to double in size over the next ten years to 676 million litres accounting for 61% of production compared to 47% at present. This is illustrated in Figure 2. There are five key quality/price segments in the wine industry. The principal driving force behind increasedAustralasian Marketing Journal 10 (3), 200277Green International Wine MarketingTable 1: 1997 World Wine Export Value (Source: Berger, Spahini and Anderson 1999) Country Export Value as a % of world wine exports 41.7 17.2 9.2 4.8 4.3 3.8 3.6 3.3 3.2 1.5 Old or New World Wines1. France 2. Italy 3. Spain 4. Australia 5. Portugal 6. Germany 7. Chile 8. USA 9. Fomer Soviet Union 10. South AfricaOld Old Old New Old Old New New Old Newexport sales is considered to be in the branded premium wine segment estimated to account for 34% of world wine sales. Australian brands in relation to these segments are shown in Figure 3. As the graph shows, Banrock Station falls into the premium category (above ‘basic’, and below ‘super-premium’). Developing an International Strategy The challenge for BRL Hardy is how to secure additional export sales in an increasingly competitive market. Application of Porter’s ‘Five Forces Model’ (1990) to the global marketplace for Australian wines indicates: New Entrants: There is a likely threat from new entrants, especially from large global liquor giants such as Diageo and Allied Domecq of the UK and LVMH and Pernod Ricard of France, who see the wine sector as a faster growing business compared to other liquor categories such as spirits, beer and champagne with which they were historically associated. They are aggressively embarking on acquisitions and are interested in Australian wineries. Suppliers: There is a low threat from suppliers of grapesas these have little bargaining power apart from those supplying Merlot and Verdelho who have more clout due to some shortage of these varieties. Over-planting of red wine grapes has given Australian wineries scope to obtain higher quality product at a competitive price. Buyers: The threat from buyers is high as securing distribution in a crowded market is difficult, especially when the distribution channels in major overseas markets are largely dominated by supermarket and major liquor chains. There is some evidence that distributors are becoming more favourably disposed towards Australian wines due to their consistent quality and availability. Substitutes: Although there are other alcoholic products that compete with wine, wine is the fastest growing alcoholic beverage on a global basis. Australia has a comparative advantage in producing innovative, high quality wines which, because they can be consumed without aging, attract new wine consumers and young drinkers in ‘old world’ countries. As illustrated in Figure 4, BRL countered the reaction of industry competitors to overseas market entry. BRL differentiated themselves by pursuing a niche market78Australasian Marketing Journal 10 (3), 2002Green International Wine Marketingstrategy in their target overseas markets. This was achieved by positioning the Banrock Station brand initially in the two major markets of the UK and USA as a ‘green’ wine that supports conservation activities. This involved looking at the market from a different perspective and looking at areas to create value to differentiate the selected brand from the competitive pack. The key to discovering new value was asking four basic questions, as outlined in the Kim and Mauborgne Model (1999) shown in Table 2. Addressing these key questions has allowed BRL to create Banrock Station - a wine that can be simply positioned as “good wine, good earth, good living”. Kim and Mauborgne (1999) suggest ‘The Value Curve’ – a graphic depiction of the way a company or industry configures its offering to customers – is a powerful tool for creating new market space. It is drawn by plotting the performance of the offering relative to other alternatives along the key success factors that define competition inthe industry. Identified in Figure 4, the creation of a new value curve would appear to be possible for Banrock Station wine, by adopting a marketing positioning strategy based on a ‘green’ wine that supports conservation activities. Creating a ‘Green’ Brand Creating a ‘green brand’ meant tapping into the values and beliefs of wine buyers. As a starting point, BRL Hardy recognised that their investment in and achievement of restoring the magnificent Banrock Station wetlands might be shared with their customers. This strategy has proven to be successful in Australia. With every bottle of Banrock Station wine sold, a portion of the sale proceeds is donated to conservation projects to ensure environmental havens are restored and preserved for future generations. All proceeds in Australia go to Wetland Care Australia and Landcare Australia. An analysis of the demographics of wine consumption inYear 676 437 Forecast20102001 Current339 3691990 Historical 042 301200400 Million Litres600800International Markets Australian DomesticFigure 2: Australian Domestic Market vs International Market Growth (Data Source: Wine Federation of Australia & Australian Wine and Brandy Corporation, 2000)Australasian Marketing Journal 10 (3), 200279Green International Wine MarketingPrice Price range ICON USD 50 AU 50 UK 20 Indicative brandsPenfolds Grange Henschke Hill of Grace Leeuwin Chardonnay Petaluma Coonawarravolume market share: 1%Price range ULTRAPREMIUMUSD 14-49.99 Indicative brands AU 15-49.99 Wolf Blass Grey Label Orlando St Hugo UK 7-19.99 BrokenwoodDe Bortoli Yarra Valley Pipers Brookvolume market share: 5%Price rangeUSD 8-13.99 Indicative brands AU 10-14.99 Penfolds Koonunga Hill Jamieson's Run UK 5-6.99 Rosemount Diamond LabelLeasingham Bin Rangevolume market share: 10%SUPER PREMIUMPrice rangeUSD 5-7.99 AU 5-9.99 UK 3-4.99Indicative brandsBarramundi Banrock Station Jacobs Creek Lindeman's Bin Range Oxford Landing Hardy's Nottage Hillvolume market share: 34%PREMIUM Price range < USD 5volume market share: 50%BASICVolumeFigure 3: Quality Segments in the Wine Industry (Source: Wine Federation of Australia & Australian Wine and Brandy Corporation, 2000) developed country markets such as Australia indicates that the bulk of wine consumers typically fall into the age group 40 and 60 years with a skew towards women. This generation is often referred to as ‘Baby Boomers’ and represents about 24% of the Australian population and around 33% of the US population. It is a group that is sensitive to environmental concerns. They were the original activists and are pro environmentalists. They created the first Earth Day back in 1970. However, the values of this group have not previously been tapped as far as wine marketing is concerned. For this strategy to be implemented, it must be conveyed to the customer via the brand. The brand is a bond with the customer. Keegan, Moriarty and Duncan (1992, p. 448) defines it as a “perception in the mind of consumers who ascribe beliefs, values and personalities to products” and Kotler (2000, p. 404) as a “seller’s promise to deliver a specific set of features, benefits and services consistently to buyers”. Strategically, it has been brands that have made Australian wine producers successful over other market competitors - not the name of the wine producer. Successful wine, the brand and the attitude it engenders, must relate to the wine consumer’s own sense of individuality and unique style. For a ‘green’ wine, the brand image should appeal to consumer’s who are seek-80Australasian Marketing Journal 10 (3), 2002Green International Wine MarketingSource: Banrock Station Wine postcarding a product that fits with their values of good living, being healthy and their desire to act in an environmentally friendly way. Wine buyers are thinking about the quality connection with where the product comes from and what they are purchasing. Ottman (1992) claimed that while quality, price and convenience are still uppermost in consumers’ purchasing decisions, a fourth attribute, environmental compatibility, that is a product’s greenness, is fast becoming a tie-breaker at the shelf.By linking Banrock Station’s brand attributes of good value, quality wines, that are ready to drink now, with a conservationist personality it is intended to create a new source of competitive advantage for BRL Hardy’s Banrock Station brand. The brand slogan “good earth, fine wine” easily identifies Banrock Station with supporting the environment. Additional in-store promotional material highlights Banrock Station Wines conservation initiatives – for example, a bottle flyer with a pelican. This saves the consumer time in evaluating otherTable 2: Creating a New Value Curve Key Questions 1. Reduce – What factors should be reduced well below the industry standard? Areas for innovation – Price – Length of time to markets from the vine to the table – Alcohol content – A representation of healthy living – An environment friendly wine – A relationship with the brand – Flavour and wine quality – Innovative wine styles – Interesting brands – Standard labels/packaging – Snob Factor – Wine speak2. Create – What factors should be created that the industry has never offered?3. Raise – What factors should be raised well above industry standards?4. Eliminate – What factors should be eliminated that the industry takes for granted?Australasian Marketing Journal 10 (3), 200281Green International Wine MarketingHighRelative valueNealu wVeCLow Price Quality Taste Ready to drink Environment friendlyKey elements of the wine industry product, service and deliveryTraditional bottled wine value curve Banrock Station wine's new value curveFigure 4: The New Value Curve for Banrock Station Winebrands and helps them to easily distinguish the point of difference in retail outlets. In addition, Banrock Station’s green brand image is reflected in the advertising, good news stories about conservation projects, packaging, point of purchase promotions, wine shows and on the website where consumers can take a virtual tour of Banrock Station (see: .au). Application of ‘Green’ Brand Equity to International Markets As the ‘green’ marketing approach was successful in Australia, BRL Hardy decided to apply it to selected overseas markets which were considered to offer longterm growth potential. The eight selected international wine markets were the USA, Netherlands, Canada, Sweden, New Zealand, UK, Finland and Denmark. All are developed markets with environmentally sensitive ‘Baby Boomers’. In these markets, BRL aimed to build strategic alliances with local conservation groups, as they did in Australia. A key to the market entry strategywas establishing strategic alliances with ‘green’ groups so as to increase consumer’s confidence in and credibility of the brand’s environmental claims. In each case, a certain percentage of profit from sales of each bottle of wine would go to the alliance partner to fund environmental projects. Implementation of this international approach was facilitated by hiring an environmental scientist, Tony Sharley, who manages the Banrock Station Wine and Wetland Centre in Australia. In this role, he manages conservation projects with organisations in key international markets and can verify Banrock Station’s ‘green’ credentials. High on the agenda was Australia’s number one wine market, the UK, where BRL sells a number of successful brands. In the UK, Banrock Station wines and the Wildfowl and Wetlands Trust (WWT) are working together to save wetlands and wildlife. Funds from Banrock Station wines are being used to support the continual monitoring and maintenance of 4,000 acres of WWT’s wetland reserves and their wildlife.82Australasian Marketing Journal 10 (3), 2002urveGreen International Wine MarketingIn Canada, BRL established their own organisation to coordinate environmental projects to help conserve and protect endangered birds and wetlands (the Banrock Station Wine Wetland Foundation, Canada). In the USA, Banrock Station has partnered with the Arthur R Marshall Foundation to champion restoration and preservation of America’s Greater Everglades ecosystem and sponsored Cypress Tree Planting Day in an effort to restore the Everglades ancient forest. In Europe, Banrock Station wines are working with the Swedish Wetland Fund, with proceeds supporting OsterMalma, Lida and other wetlands in the area; in Finland, with Liminganlahti Bay, a high profile and highly regarded wetland region in the north of Finland; and in Netherlands Banrock Station wines, Staatsbosbeheer and Wetlands International are working together to save wetlands. Recently, Banrock Station commenced a partnership with Danish Nature who will use the funds to restore wetland in the Langelands region. Closer to home, Banrock Station wines have combined with the environment group, Wetland Care New Zealand to sponsor wetland restoration projects throughout New Zealand. The first year’s proceeds under the sponsorshiphelped to develop a wetland within the widely acclaimed Karori Sanctuary in Wellington and this year a wetland has been created at Masterton in the Wairarapa region. International Sales Growth Figure 3 shows that Banrock Station is in the premium wine category offering good value for money. A similar price positioning has been adopted in selected overseas markets. As such, it is priced below some of its major Australian competitors. In the UK, BRL Hardy has had to contend with a distribution system where the retailers are gate-keepers and ten accounts can represent 70% of the market. Here, buyer label wines account for a considerable share of the market. To counter this it is necessary for Banrock Station to create an awareness of their own brand. This is being achieved via the use of cinema and outdoor advertising, including the London Underground. By contrast, in the USA the distribution of wines approximates that of fast moving consumer goods (FMCG) and there is little wine sold under the labels of buyers. The value for money claim is being augmented in all markets with the “support conservation theme” and point-of-sale support that reinforces the conservation image. It is this support that provides the brand with its unique selling proposition (USP).Table 3: UK Brands Top Wines 2000 Listing (Source: Macquarie Bank Research 2001) Brand Ernest & Julio Gallo Jacobs Creek Hardys Stowells of Chelsea Rosemount Lindemans Penfolds Blossom Hill Le Piat D’or Banrock Station Company E&J Gallo Winery Orlando Wyndham BRL Hardy Wine Matthew Clark Rosemount Wine Estates Southcorp Wines Southcorp Wines UDV Piat Pere Et Fils BRL Hardy Wine Off Trade % Growth 22% 24% 33% 28% 69% 53% 2% 143% (-15%) 165%Australasian Marketing Journal 10 (3), 200283Green International Wine MarketingThis approach has proved to be a deciding factor at the point-of-purchase amongst the growing number of environmentally conscious consumers in the US and the UK. Banrock Station wines are proving to be a stand out performer for BRL Hardy in international markets. They are ranked Number 7 in the Top 10 selling Australian wine brands in the US Market and 3rd in volume of the premium Australian brands exported to the US. In the 13-week period ending 17 May 2001, Banrock Station’s overall ranked position in the US market was 189th and it is the fastest growing brand in the BRL portfolio. Banrock Station is the number one fastest growing brand in the UK as shown in Table 3. There is no doubt that much of this success has been due to the ‘green’ international wine marketing of Banrock Station wines. Future growth is dependent upon maintaining and building the brand through continued investment in conservation projects and the development of new markets with significant segments of environmentally friendly wine buyers. Key Lessons The success of BRL’s Banrock station brand in the UK and US markets to date can be explained in part by its being a ‘new world’ wine, priced in the attractive ‘premium’ wine category with a country of origin image associated with sunshine, health and wide open spaces – an attractive image consistent with wine production. However, of themselves these ‘new world’ wine characteristics do not explain the rapid rise in overseas sales, nor its major market share amongst the Australian premium wine segment. Success is also due to the niche marketing strategy pursued by the firm of positioning the brand as a ‘green’ wine that supports conservation activities. This strategy has positioned the brand in a new marketspace that includes environmentally conscious consumers. This strategy appeals to a different set of values, and values not targeted by other wine producers. Although the magnitude of this segment may differ between countries, environmentally conscious consumers are a global segment that offers considerable potential for the future marketing of the Banrock Station brand. The experience of BRL Hardy points to a number of other key lessons in international marketing that may help other companies also break free from the competitive pack. The first of these is that innovative marketing approaches are a useful vehicle for companies to create new overseas markets and/or reposition themselves in existing markets. BRL’s approach was to look at their market from a new perspective and create new value forstakeholders in those markets. This was achieved by tapping into the values and beliefs of their customers and creating new product attributes to influence the purchasing decisions of customers. In this case it was by creating a brand associated with caring for the environment as illustrated by investing sales receipts back into conservation projects. The second lesson relates to the need to pursue a strategy in depth rather than superficially if it is to be effective in overseas markets. In this case a company embarking on a ‘green’ brand strategy needs to realise it has to be more than just a gimmick. The company has to excel in delivering not just the product benefits, but also the green benefits that customers truly desire. BRL’s experience shows their ‘green’ brand has to stay relevant and credible. This was achieved by ongoing restoration of its own wetland, employing an environmental scientist, and consistently communicating the brand’s environmental initiatives and project involvement via publication of ‘good news’ stories, distinctive product packaging and labelling, and through the focus of its sales team. Only in this way can a company continue to grow the market in its chosen segment. Finally, the application of brand management to overseas markets often requires the building of strategic alliances with local groups if brand equity is to be sustained or further developed in these overseas markets. In the case of BRL Hardy, the strategic alliances were with local conservation groups similar to those with whom alliances had been forged in Australia. The lesson from Australia was in this case applied in overseas markets – that the brand must associate itself with the projects of its alliance partner and should do this by the firm’s management maintaining an active interest in the quality of those environmental projects. Banrock Station’s environmental scientist developed quality controls to ensure that funds directed to those conservation groups from Banrock Station sales were invested in technically sound and rewarding conservation projects. If ‘green’ projects are important, well supported and understood by the consumer, the brand will build and increase its ‘green’ brand equity. In summary, BRL have shown how important a ‘green’ brand is to increasing market share and how innovation in marketing can help a company create a point of difference that redefines the attributes on which buyers base their purchasing decision. References Ahmed, S.A., D’Astous, A., 1996. Country of Origin and Brand Effects: A Multi-Dimensional and Multi-Attribute84Australasian Marketing Journal 10 (3), 2002Green International Wine MarketingStudy. Journal of International Consumer Marketing 9(2), 93-115. Berger, N., Saphini, P., Anderson, K., 1999. Bilateral Trade Patterns in the World Wine Market 1988 to 1997: A Statistical Compendium. University of Adelaide: Centre for International Economic Studies. Keegan, W., Moriarty, S., Duncan, T., 1992. Marketing. New Jersey: Prentice Hall. Kim, C., Mauborgne, R, 1999. Creating New Market Space. Harvard Business Review, January-February, 83-93. Kotler, P., 2000. Marketing Management: The Millenium Edition. New Jersey: Prentice Hall. Macquarie Bank Research, 2001. Essentials, March 2001. Ottman, J A, 1992. Green Marketing: Challenges and Opportunities for the New Marketing Age. Chicago: NTC Business Books. Porter, M., 1990. The Competitive Advantage of Nations. London: Macmillan. Wine Federation of Australia & Australian Wine and Brandy Corporation, 2000. The Marketing Decade 20002010, November (.au).Acknowledgements The authors of this case are grateful to Mr Stephen Millar (Managing Director, BRL Hardy Ltd); Mr David Woods (International Trading Director, BRL Hardy Ltd) and Mr Tony Sharley (Manager, Banrock Station Wine and Wetland Centre) for agreeing to be interviewed and for their valuable insights. Biographies Mary Pugh is a Marketing Project Manager at the NSW Police. She has recently graduated from the Masters of Business (International Marketing) program. Richard Fletcher, PhD, is an Associate Professor and Director of Post Graduate Programs in the School of Marketing, University of Technology, Sydney. Correspondence Addresses Mary Pugh, C/o School of Marketing, University of Technology, City Campus, Quay St, Haymarket, PO Box 123 Broadway, Sydney NSW 2007. Email: marygabrielle @, Richard Fletcher, School of Marketing, University of Technology, City Campus, Quay St, Haymarket, PO Box 123 Broadway, Sydney NSW 2007. Telephone: +61 (2) 9514 3537, Facsimile: +61 (2) 9514 3535, e-mail: Richard.Fletcher@.auAustralasian Marketing Journal 10 (3), 200285。

外文文献翻译范例

外文文献翻译范例
正如建筑师和工程师Bruce Graham,Fazlur Khan of Skidmore, Owings and Merrill.(SOM)的芝加哥办公室设计,结构为(225 x为一整体225英尺)一个“绑定圆管状造型”的九个方面的75英尺广场系统,嵌装在一个深色玻璃幕墙。五十层以上,有的就离开广场的塔上升到创建更小的地板加强板和独特的剪影。
StatusComplete
Type:Office
Location:Hong Kong
Construction started:18 April 1985
Completed:1990
Opening:17 May 1990
HeightAntenna spire:367.4 m (1,205.4 ft)
2011年6月8日
外文文献翻译(译成中文1000字左右):
【主要阅读文献不少于5篇,译文后附注文献信息,包括:作者、书名(或论文题目)、出 版 社(或刊物名称)、出版时间(或刊号)、页码。提供所译外文资料附件(印刷类含封面、封底、目录、翻译部分的复印件等,网站类的请附网址及原文)
原文网址:/TALLEST_TOWERS/t_sears.htm
译文
建筑师:Bruce Graham, design partner, Skidmore, Owings and Merrill
地点:Chicago
甲方:Sears Roebuck and Company
工程师:Fazlur Khan of Skidmore, Owings and Merrill.项目年份:2008
香港1985年4月18日开工建设1990年完成1990年5月17日开幕高度天线尖顶三百六十七点四米2418英尺屋顶三百一十五点米10335英尺顶层二百八十八点二米九百四十五点五英尺技术细节地上楼层数724层楼建筑面积一十三点五万平方米1450000平方英尺电梯数45由奥的斯电梯公司生产的设计与施工主要承建商香港建设控股有限公司引文需要熊谷组香港贝聿铭建筑师事务所建筑师事务所谢尔曼西贡有限公司sl的托马斯博阿达莱斯利罗伯逊结构工程师协会rllp参考文献对中国塔简称中银大厦银行是中环香港最知名的摩天大楼之一

外文翻译与文献综述模板格式以及要求说明

外文翻译与文献综述模板格式以及要求说明

杭州电子科技大学信息工程学院毕业论文外文文献翻译要求根据《普通高等学校本科毕业设计(论文)指导》的内容,特对外文文献翻译提出以下要求:一、翻译的外文文献可以是一篇,也可以是两篇,但总字符要求不少于1.5万(或翻译成中文后至少在3000字以上)。

二、翻译的外文文献应主要选自学术期刊、学术会议的文章、有关著作及其他相关材料,应与毕业论文(设计)主题相关,并作为外文参考文献列入毕业论文(设计)的参考文献。

并在每篇中文译文首页用“脚注”形式注明原文作者及出处,中文译文后应附外文原文。

三、中文译文的基本撰写格式为:1.题目:采用小三号、黑体字、居中打印;2.正文:采用小四号、宋体字,行间距一般为固定值20磅,标准字符间距。

页边距为左3cm,右2.5cm,上下各2.5cm,页面统一采用A4纸。

四、封面格式由学校统一制作(注:封面上的“翻译题目”指中文译文的题目),并按“封面、译文一、外文原文一、译文二、外文原文二、考核表”的顺序统一装订。

五、忌自行更改表格样式。

毕业论文外文文献翻译毕业设计(论文)题目Xxx翻译(1)题目指翻译后的中文译文的题目翻译(2)题目指翻译后的中文译文的题目系会计系以本模板为准)专业XXXXXX(以本模板为准)姓名XXXXXX(以本模板为准)班级XXXXXX(以本模板为准)学号XXXXXX(以本模板为准)指导教师XXXXXX(以本模板为准)正文3杭州电子科技大学信息工程学院本科毕业论文文献综述的写作要求为了促使学生熟悉更多的专业文献资料,进一步强化学生搜集文献资料的能力,提高对文献资料的归纳、分析、综合运用能力及独立开展科研活动的能力,现对本科学生的毕业设计(论文)提出文献综述的写作要求,具体要求如下:一、文献综述的概念文献综述是针对某一研究领域或专题搜集大量文献资料的基础上,就国内外在该领域或专题的主要研究成果、最新进展、研究动态、前沿问题等进行综合分析而写成的、能比较全面地反映相关领域或专题历史背景、前人工作、争论焦点、研究现状和发展前景等内容的综述性文章。

外文翻译资料及译文

外文翻译资料及译文

附录C:外文翻译资料Article Source:Business & Commercial Aviation, Nov 20, 2000. 5-87-88 Interactive Electronic Technical Manuals Electronic publications can increase the efficiency of your digital aircraft and analogtechnicians.Benoff, DaveComputerized technical manuals are silently revolutionizing the aircraft maintenance industry by helping the technician isolate problems quickly, and in the process reduce downtime and costs by more than 10 percent.These electronic publications can reduce the numerous volumes of maintenance manuals, microfiche and work cards that are used to maintain engines, airframes, avionics and their associated components."As compared with the paper manuals, electronic publications give us greater detail and reduced research times," said Chuck Fredrickson, general manager of Mercury Air Center in Fort Wayne, Ind.With all the advances in computer hardware and software technologies, such as high quality digital multimedia, hypertext and the capability to store and transmit digital multimedia via CD-ROMs/ networks, technical publication companies have found an effective, cost-efficient method to disseminate data to technicians.The solution for many operators and OEMs is to take advantage of today's technology in the form of Electronic Technical Manuals (ETM) or Interactive Technical Manuals (IETM). An ETM is any technical manual prepared in digital format that has the ability to be displayed using any electronic hardware media. The difference between the types of ETM/IETMs is the embedded functionality and implementation of the data."The only drawback we had to using ETMs was getting enough computers to meet our technicians' demand," said Walter Berchtold, vice president of maintenance at Jet Aviation's West Palm Beach, Fla., facility.A growing concern is the cost to print paper publications. In an effort to reduce costs, some aircraft manufacturers are offering incentives for owners to switch from paper to electronic publications. With an average printing cost of around 10 cents per page, a typical volume of a paper technical manual can cost the manufacturer over $800 for each copy. When producing a publication electronically, average production costs for a complete set of aircraft manuals are approximately $20 per copy. It is not hard to see the cost advantages of electronic publications.Another advantage of ETMs is the ease of updating information. With a paper copy, the manufacturer has to reprint the revised pages and mail copies to all the owners. When updates are necessary for an electronic manual, changes can either be e-mailed to theowners or downloaded from the manufacturer's Web site.So why haven't more flight departments converted their publications to ETM/IETMs? The answer lies in convincing technicians that electronic publications can increase their efficiency."We had an initial learning curve when the technicians switched over, but now that they are familiar with the software they never want to go back to paper," said Fredrickson.A large majority of corporate technicians also said that while they like the concept of having a tool that aids the troubleshooting process, they are fearful to give up all of their marked-up paper manuals.In 1987, a human factors study was conducted by the U.S. government to compare technician troubleshooting effectiveness, between paper and electronic methodology, and included expert troubleshooting procedures with guidance through the events. Results of the project indicated that technicians using electronic media took less than half the time to complete their tasks than those using the paper method, and technicians using the electronic method accomplished 65 percent more in that reduced time.The report also noted that new technicians using the electronic technical manuals were 12-percent more efficient than the older, more experienced technicians. (Novices using paper took 15 percent longer than the experts.)It is interesting that 90 percent of the technicians who used the electronic manuals said they preferred them to the paper versions. This proved to the industry that with proper training, the older technicians could easily transition from paper to electronic media.Electronic publications are not a new concept, although how they are applied today is. "Research over the last 20 years has provided a solid foundation for today's IETM implementation," said Joseph Fuller of the U.S. Naval Surface Warfare Center. "IETMs such as those for the Apache, Comanche, F-22, JSTAR and V-22 have progressed from concept to military and commercial implementation."In the late 1970s, the U.S. military investigated the feasibility of converting existing paper and microfilm. The Navy Technical Information Presentation System (NTIPS) and the Air Force Computer- based Maintenance Aid System (CMAS) were implemented with significant cost savings.The report stated that transition to electronic publications resulted in reductions in corrective maintenance time, fewer false removals of good components, more accurate and complete maintenance data collection reports, reduction in training requirements and reduced system downtime.The problem that the military encountered was ETMs were created in multiple levels of complexity with little to no standardization. Options for publications range from simple page-turning programs to full-functioning automated databases.This resulted in the classification of ETMs so that the best type of electronic publication could be selected for the proper application.Choosing a LevelWith all of the OEM and second- and third-party electronic publications that are available it is important that you choose the application level that is appropriate for your operation.John J. Miller, BAE Systems' manager of electronic publications, told B/CAthat "When choosing the level of an ETM/IETM, things like complexity of the aircraft and its systems, ease of use, currency of data and commonality of data should be the deciding factors; and, of course, price. If operational and support costs are reduced when you purchase a full-functioning IETM, then you should purchase the better system."Miller is an expert on the production, sustainment and emerging technologies associated with electronic publications, and was the manager of publications for Boeing in Philadelphia.Electronic publications are classified in one of five categories. A Class 1 publication is a basic electronic "page turner" that allows you to view the maintenance manual as it was printed. With a Class 2 publication all the original text of the manual is viewed as one continuous page with no page breaks. In Class 3, 4 and 5 publications the maintenance manual is viewed on a computer in a frame-based environment with increasing options as the class changes. (See sidebar.)Choosing the appropriate ETM for your operation is typically limited to whatever is being offered on the market, but since 1991 human factors reports state the demand has increased and, therefore, options are expected to follow.ETM/IETM ProvidersCompanies that create ETM/IETMs are classified as either OEM or second party provider. Class 1, 3 and 4 ETM/IETMs are the most commonly used electronic publications for business and commercial operators and costs can range anywhere from $100 to $3,000 for each ETM/ IETM. The following are just a few examples ofETM/IETMs that are available on the market.Dassault Falcon Jet offers operatorsof the Falcon 50/50EX, 900/900EX and 2000 a Class 4 IETM called the Falcon Integrated Electronic Library by Dassault (FIELD). Produced in conjunction with Sogitec Industries in Suresnes Cedex, France, the electronic publication contains service documentation, basic wiring, recommended maintenance and TBO schedules, maintenance manual, tools manual, service bulletins, maintenance and repair manual, and avionics manual.The FIELD software allows the user to view the procedures and hot- link directly to the Illustrated parts catalog. The software also enables the user to generate discrepancy forms, quotation sheets, annotations in the manual and specific preferences for each user.BAE's Miller said most of the IETM presentation systems have features called "Technical Notes." If a user of the electronic publication notices a discrepancy or needs to annotate the manual for future troubleshooting, the user can add a Tech Note (an electronic mark-up) to the step or procedure and save it to the base document. The next time that or another user is in the procedure, clicking on the tech note icon launches a pop-up screen displaying the previous technician's comments. The same electronic transfer of tech notes can be sent to other devices by using either a docking station or through a network server. In addition, systems also can use "personal notes" similar to technical notes that are assigned ID codes that only the authoring technician can access.Requirements for the FIELD software include the minimum of a 16X CD-ROM drive,Pentium II 200 MHz computer, Windows 95, Internet Explorer 4 SP 1 and Database Access V3.5 or higher.Raytheon offers owners of Beech and Hawker aircraft a Class 4 IETM called Raytheon Electronic Publication Systems (REPS). The REPS software links the frame-based procedures with the parts catalog using a single CD-ROM.Raytheon Aircraft Technical Publications said other in- production Raytheon aircraft manual sets will be converted to the REPS format, with the goal of having all of them available by 2001. In addition Raytheon offers select Component Maintenance Manuals (CMM). The Class 1 ETM is a stand-alone "page-turner" electronic manual that utilizes the PDF format of Adobe Acrobat.Other manufacturers including Bombardier, Cessna and Gulfstream offer operators similar online and PDF documentation using a customer- accessed Web account.Boeing is one manufacturer that has developed an onboard Class 5 IETM. Called the Computerized Fault Reporting System (CFRS), it has replaced the F-15 U.S. Air Force Fault Reporting Manuals. Technologies that are currently being applied to Boeing's military system are expected to eventually become a part of the corporate environment.The CFRS system determines re-portable faults by analyzing information entered during a comprehensive aircrew debrief along with electronically recovered maintenance data from the Data Transfer Module (DTM). After debrief the technicians can review aircraft faults and schedule maintenance work to be performed. The maintenance task is assigned a Job Control Number (JCN) and is forwarded electronically to the correct work center or shop. Appropriate information is provided to the Air Force's Core Automated Maintenance System (CAMS).When a fault is reported by pilot debrief, certain aircraft systems have the fault isolation procedural data on a Portable Maintenance Aid (PMA). The JCN is selected on a hardened laptop with a wireless Local Area Network (LAN) connection to the CFRS LAN infrastructure. The Digital Wiring Data System (DWDS) displays aircraft wiring diagrams to the maintenance technician for wiring fault isolation. On completion of maintenance, the data collected is provided to the Air Force, Boeing and vendors for system analysis.Third party IETM developers such as BAE Systems and Dayton T. Brown offer OEMs the ability to subcontract out the development of Class 1 through 5 ETM/IETMs. For example, Advantext, Inc. offers PDF and IPDF Class 1 ETMs for manufacturers such as Piper and Bell Helicopters. Technical publications that are available include maintenance manuals, parts catalogs, service bulletins, wiring diagrams, service letters and interactive parts ordering forms.The difference between the PDF and IPDF version is that the IPDF version has the ability to search for text and include hyperlinks. A Class 1 ETM, when printed, is an exact reproduction of the OEM manuals, including any misspellings or errors. Minimum requirements for the Advantext technical publications is a 486 processor, 16 MB RAM with 14 MB of free hard disk space and a 4X CD-ROM or better.Aircraft Technical Publishers (ATP) offers Class 1, 2 and 3 ETM/ IETMsfor the Beechjet 400/400A; King Air 300/ 350, 200 and 90; Learjet 23/24/25/28/29/35/36/55; Socata TB9/10/20/21 and TBM 700A; Sabreliner 265-65, -70 and -80; andBeech 1900. The libraries can include maintenance manuals, Illustrated parts bulletins, wiring manuals, Airworthiness Directives, Service Bulletins, component maintenance manuals and structural maintenance manuals. System minimum requirements are Pentium 133 MHz, Windows 95 with 16 MB RAM, 25 MB free hard disk space and a 4X CD-ROM or better.Additional providers such as Galaxy Scientific are providing ETM/ IETMs to the FAA. This Class 2, 3 and 4 publication browser is used to store, display and edit documentation for the Human Factors Section of the administration."Clearly IETMs have moved from research to reality," said Fuller, and the future looks to hold more promise.The Future of Tech PubsThe use of ETM/IETMs on laptop and desktop computers has led research and development corporations to investigate the human interface options to the computer. Elements that affect how a technician can interface with a computer are the work environment, economics and ease of use. Organizations such as the Office of Naval Research have focused their efforts on the following needs of technicians: -- Adaptability to the environment.-- Ease of use.-- Improved presentation of complex system relationship.-- Maximum reuse and distribution of engineering data.-- Intelligent data access.With these factors in mind, exploratory development has begun in the areas of computer vision, augmented reality display and speech recognition.Computer vision can be created using visual feedback from a head- mounted camera. The camera identifies the relative position and orientation of an object in an observed scene, and the object is used to correlate the object with a three-dimensional model. In order for a computer vision scenario to work, engineering data has to be provided through visually compatible software.When systems such as Sogitech's View Tech electronic publication browser and Dassault Systemes SA's Enovia are combined, a virtual 3D model is generated.The digital mockup allows the engineering information to directly update the technical publication information. If a system such as CATIA could be integrated into a Video Reference System (VRS), then it could be possible that a technician would point the camera to the aircraft component, the digital model identifies the component and the IETM automatically displays the appropriate information.This example of artificial intelligence is already under development at companies like Boeing and Dassault. An augmented reality display is a concept where visual cues are presented to users on a head-mounted, see-through display system.The cues are presented to the technician based on the identification of components on a 3D model and correlation with the observed screen. The cues are then presented as stereoscopic images projected onto the object in the observed scene.In addition a "Private Eye" system could provide a miniature display of the maintenance procedure that is provided from a palm- size computer. Limited success hascurrently been seen in similar systems for the disabled. The user of a Private Eye system can look at the object selected and navigate without ever having to touch the computer. Drawbacks from this type of system are mental and eye fatigue, and spatial disorientation.Out of all the technologies, speech recognition has developed into an almost usable and effective system. The progression through maintenance procedures is driven by speaker-independent recognition. A state engine controls navigation, and launches audio responses and visual cues to the user. Voice recognition software is available, although set up and use has not been extremely successful.Looking at other industries, industrial manufacturing has already started using "Palm Pilot" personal digital assistants (PDAs) to aid technicians in troubleshooting. These devices allow the technician to have the complete publication beside them when they are in tight spaces. "It would be nice to take the electronic publications into the aircraft, so we are not constantly going back to the work station to print out additional information," said Jet Aviation's Berchtold.With all the advantages that a ETM/ IETM offers it should be noted that electronic publications are not the right solution all of the time, just as CBT is not the right solution for training in every situation. Only you can determine if electronic publications meet your needs, and most technical publication providers offer demo copies for your review. B/CA IllustrationPhoto: Photograph: BAE Systems' Christine Gill prepares a maintenance manual for SGML conversion BAE Systems; Photograph: Galaxy Scientific provides the FAA's human factors group with online IETM support.; Photograph: Raytheon's Class 4 IETM "REPS" allows a user to see text and diagrams simultaneously with hotlinks to illustrated parts catalogs.外文翻译资料译文部分文章出处:民航商业杂志,2000-11-20,5-87-88交互式电子技术手册的电子出版物可以提高数字飞机和模拟技术的效率。

翻译资料(一)

翻译资料(一)

问答(一)问:罗老师好!我们现在读大三第一学期,开设了“翻译理论与实践”这门课,课后的笔译练习比较多。

一做起翻译练习来,就自然想起要查查词典,英英词典、英汉词典或汉英词典等。

请问有什么好的词典可以推荐介绍给我们?谢谢!答:好的,我可以按英国、美国和中国的三大词典系列给同学们推荐介绍,大家可根据个人的实际需要来选择。

但在这里我有一条忠告,就是在做翻译练习的时候不要过多地依赖词典,而要在阅读分析原文上面多下功夫,要深入理解原文词句在上下文当中的具体内涵。

如果过多地依赖词典,对着词典照抄照搬,那么对原文的阅读和分析、理解和想象就会减少,这样翻译出来的东西往往质量不高,表现在篇章连贯性差、用词不贴切不传神等方面。

总之,我们要善用词典,用得好,帮大忙;用不好,真倒霉。

1.英国词典系列1.1 Oxford English Dictionary (简称OED,世界最大、最权威的学者型英语词典,词源解释丰富,有如一部英语史。

以多卷本、单卷本[配放大镜]和CD-ROM等形式出版;单卷本在国内售价1500元左右。

世界各地常见的中小型牛津英语词典都是在这大部头的基础上派生出来的,包括国内出版的《牛津英汉双解词典》)。

1.2 Longman Dictionary of Contemporary English Language (即《朗文当代英语词典》,专为中高级英语学习者编写,配有丰富的插图,有丰富的例句和语法详解,用来解释词条的词汇均为常用词,浅白易懂。

该词典配有CD-ROM)。

1.3 Collins COBUILD English Dictionary (即《柯林斯英语词典》,专为中高级英语学习者编写,每个词条都有词频标注,词条解释方法独特,好懂易记。

这是一本不可多得的中高级英语学习者词典。

该词典配有CD-ROM,外教社已引进版权出版)。

1.4 Cambridge English Dictionary [International] (该词典配有CD-ROM)。

外文资料翻译

外文资料翻译

毕业论文外文资料翻译题目某燃煤采暖锅炉烟气除尘系统设计学院资源与环境学院专业环境工程班级0802学生孙红帅学号20080203039指导教师张玲二〇一二年四月二十日济南大学- 1 -济南大学- 2 -济南大学- 3 -济南大学- 4 -- 5 -济南大学- 6 -济南大学- 7 -济南大学- 8 -济南大学- 9 -济南大学- 10 -济南大学Chemical Engineering and Processing 40 (2001) 245–254.新的旋风式分离器的计算方法与纷飞挡板和底部清洁的天然气 - 第二部分:实验验证Tomasz Chmielniak a,*, Andrzej Bryczkowskia,b煤化工Zamkowa1,41-803 Zabrze,波兰研究所化学和工艺设备,波兰西里西亚技术Uni6ersity,M. Strzody7,44-100格利维采1999年11月23日收到,在2000年6月6日修订后的形式;2000年6月6日采纳摘要派生模型预测研究所收集的效率和压力下降,煤化工(IChPW)与一个旋转挡板的旋风式分离器的设计测试和实验验证的结果。

试点工作包含测试气体流速和分离效率和压降转子转速的影响。

密封流除尘效率的影响进行了测试。

一个旋转挡板分隔的特点是高效率和低的压降。

挡板高度的扩展可以得到较高的除尘效率和更低的压降。

计算方法与实验结果显示了良好的实验预期。

©2001 Elsevier Science B.V.版权所有。

关键词粉尘分离;气旋;旋流挡板;收集效率;压降1介绍由于旋转分离元素的粉尘分离器的优势,致使过去几年对这类设备[1-5]建设的深入研究和理论描述。

它还涉及建设一个在化工、煤炭加工(IChPW)研究所开发的新型旋风式分离器旋流挡板[6]。

在这个问题上[6]前文推导的理论模型来预测一个旋转挡板分离器的收集效率和压力下降。

在本文章中,发达国家的计算方法的实验和实证检验的结果报告。

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外文资料Ethics and leadership skills in the public serviceAbstractThe deteriorating situation of ethics in public administration–all around the globe–has made it a burning issue. Although ethics cannot be learned, it can be developed. Among various other approaches, improving leadership skills can prove to be effective in promoting ethics. Skilled and committed leadership can set ethical standards. Learning and mastering various technical, conceptual and interpersonal skills and other skills like emotional and social intelligence enable public servants to diffuse and establish core ethical values in the organization. The leadership skills and their role in promoting ethics have been discussed here for a better understanding of the subject.1. IntroductionThe importance of ethics in public administration has long been neglected until recently. The deteriorating situation of ethics in this field –all around the globe– has made it a burning issue. Recent ethical scandals both in the public and private sectors have influenced scholars, national and international organizations to take a deep interest in this matter. Efforts have been made to promote ethical standards of the public servants. Among various other approaches, improving leadership skills can prove to be effective in promoting ethics in public service. Hart (2001) believes ethics cannot be effective without proper leadership. With the increasingly competitive nature of global economy and other surrounding pressures, the array of required leadership skills has also expanded (Montgomery,2003). Leaders guide the members of the organization toward the goals of the organization. It is one of the main responsibilities of a good leader to ensure that the functions of the organization are performed in an ethical manner. This paper discusses the concepts of ethics, leadership and leadership skills and attempts to present the role of leadership skills in enhancing ethics in the public service.2. Ethics in the Public ServiceEthics is a must for public administrators. Public policies have a direct effect on the citizens. Therefore ensuring ethics in the public service is a crucial matter. According to Rosenbloom (1989) ethics can be considered as a form of self-accountability or an “inner check” of the conduct of pub lic administrators. Ethics are statements, written or oral, that prescribe or proscribe certain behaviours under specified conditions (Nigro & Nigro, 1989, p.37). Public service ethics encompasses a broad and widening range of principles and values. According to the United Nations Department of Economic and Social Affairs (1999) these include objectivity, impartiality, fairness, sensitivity, compassion, responsiveness, integrity, accountability, transparency, selfless devotion to duty, protection of public interest. Ethical dilemmas generally take place around administrative discretion, corruption, accountability, nepotism, interest group pressure, informationsecrecy, policy complicacies etc. Skilled leaders can play a significant role in introducing and nurturing the values of ethics and resolving these ethics related quandaries.3. Leadership and Leadership SkillsGenerally, leadership is the process by means of which a person persuades and guides the members of the group or organization towards the achievement of its objectives (Yukl, 1989; Greenburg and Baron, 1997). Norms and values are initiated from the leader, which is then developed and maintained also by the leader (Grosenick & Gibson, 2001). Leaders set examples for ideal behavior which is followed by the organization. They are the trend setters and founders of organizational culture. The success of ethics programs in any organization lies with committed leadership (Lewis, 1999; Hejka-Ekins, 2001). Leadership skills, along with increasing the effectiveness of the administrative leaders, also tend to promote ethics. According to Katz (2009), skills are not innate but they can be learned, developed and are evident in performance.3.1. Technical Skills:Technical skills involve methods, processes, procedures, or techniques which lead to better understanding of and expertise on a particular matter (Katz, 2009). These skills include factual knowledge regarding the rules, structure, management systems, and employee characteristics of the organization. It also includes knowledge concerning the organization‟s products and services like technical specifications, strengths and limitations. Technical skills are gained from an amalgamation of formal education, training and job experience. A good memory and ability to learn helps effective managers to acquire technical skills quickly from various sources of the organization. In order to instruct and guide subordinates and steer the organization in a planned way, the knowledge about products and procedures is a prime requirement (Yukl, 2001; Cook, 1998). These skills lay the foundation for inspiration, innovation and strategic planning.3.2. Conceptual Skills:Conceptual skills include analytical ability, logical thinking, concept formation, inductive and deductive analysis. According to Yukl (2001) conceptual skills involves good judgment, prudence, insight, creativity and the ability to make decisions in complex situations.Conceptual skills have been measured with a variety of different methods, including aptitude test, situational tests, interviews and critical incidents. Conceptual skills are required for effective planning, organizing and problem solving. In order to achieve a proper coordination, administrators need to understand the functioning of various parts of the organization and how they interrelate and interact with each other. “Cognitive complexity” (Yukl, 2001) – the ability to identify complex patterns of relationship and forecast future event from current developments- is required in this case.Managers also need the skill to predict the affects of external environmental changes on the organization. Effective administrative leaders rely on a combination of intuition and conscious reasoning in confronting the various decision making problems of the organization. The ability to learn and adapt to change is a prime requirement forachieving conceptual skills. …Metacognition‟ (Flavell, 1979; Yukl, 2001) is helpful in this case. It refers to the ability to impartially and intricately analyze ones‟ own cogni tive processes and find ways to improve them. These abilities enable leaders to learn from mistakes and alter their assumptions and beliefs.3.3. Interpersonal Skills:Interpersonal skills include knowledge about human behavior and group processes, ability to understand the feelings, attitudes and intentions of others, and ability to clearly and credibly correspond. This category of leadership skills also include …the skills required for coordination of actions of oneself and others (Gillen & Carroll, 1985; Mumford, Marks et al., 2000), and negotiation skills to reconcile differences among employee perspectives and establish mutually satisfying relationships (Copeman, 1971; Mahoney, Jerdee, & Carroll, 1963; Mahoney et al., 1965; Mintzberg, 1973), and persuasion skills to influence others to more effectively accomplish organizational objectives (Katz, 1974; Mintzberg, 1973; Yukl, 1989)‟ (as cited in Mumford et al 2007 p, 157).These skills help to influence people and thereby makes dissemination of views and information easy (Northouse, 2009). This enables the leader to solve problems in a constructive and effective manner.3.4. Emotional Intelligence:Emotions are strong feelings which even after the intensity fades, is likely to linger on as a positive or negative mood. This can sometimes adversely affect leadership behavior. Emotional Intelligence (EI) can help to resolve this situation. EI can be defined as the degree to which people are accustomed to their own feelings and to the feelings of others (Yukl, 2001). It refers to the ability to put together emotions and reasons in such a way that emotions are used to assist cognitive processes and emotions are rationally managed. EI includes skills like self-awareness, communication skills, empathy andself-regulation through which leadership traits can be learned (Goleman, McKee, and Boyatzis, 2002).EI helps leadership role in solving complex problems, better decision making, time management and crisis management. Self awareness enables the leader to be aware of ones own demands and reactions to certain situations. Therefore it assists in the evaluation of alternative solutions. Self-regulation helps to maintain enthusiasm and optimism. Strong social skills which are necessary to develop cooperative interpersonal relationships are regarded as empathy. For example, the ability to listen attentively results in effective communication and conveys appreciation and positive regard.3.5. Social Intelligence:Social intelligence is the ability to determine the requirements for leadership in a particular situation and select an appropriate response. It consists of perceptiveness and behavioral flexibility (Yukl, 2001). Social perceptiveness means the ability to understand the needs, problems and openings of the organization. It also includes the ability to understand the characteristics of the members, social relationships and collective processes that tend to influence the organization (Northouse, 2009). Behavioral flexibilityis the ability and enthusiasm to change one‟s behavior to adjust requirements of new circumstances.4. Leadership Skills and Enhanced Ethics in the Public ServicePublic servants have to exercise administrative discretion while performing their duties. Public trust on the government depends on the manner through which these duties are carried out. Therefore it is crucial to maintain ethical standards in the implementation of government functions. Leadership can have considerable effect on the enhancement of overall ethics in the public service. The administrative leaders should unswervingly take part in all the stages of ethics program - from planning to implementation- sincerely abide by the code of ethics and encourage ethical behavior in the organization by being role models (Hejka-Ekins, 2001). Different leadership skills can escalate the strength of the leader in achieving these purposes. Some of these skills are interrelated and therefore tend to have overlapping results. For example, social skills are essential to develop empathy, which is an integral part of emotional intelligence.Technical skills help the leader to become more efficient and responsive. These skills enable the leaders to independently take technical decisions and thereby detect any attempt of deception related to technical matters. Knowledge and regard forrules-regulations helps to establish rule of law, accountability and transparency. With sound understanding on rules and regulations the leader is more likely to work within the legal ambit. This reduces the risks of unethical behavior. Conceptual skills support the leaders in effective planning, organizing and problem solving. These skills are highly essential to confront ethical dilemmas and conflicts of interest. Skills like these prepare leaders with good judgment and allow the leader to comprehend the consequences of any action beforehand. Thus controversial decisions can be avoided. These skills lead to ethical decisions and reliability. Interpersonal skills and social intelligence make the transmission of ethical values in the organization smoother. They engender compassion and sensitivity which are favorable to the augmentation of ethics. Leaders possessing these skills can easily diffuse the core ethical values among the members of the organization. The leader can also motivate the officials to earnestly take up these values so that they become embedded in the culture of the organization. The practice of various interpersonal and social skills creates an open and friendly environment that motivates employees to expose wrong doings without fear. Emotional intelligence prevents the executive from taking emotionally biased unethical decisions. Hence it facilitates in maintaining impartiality and protection of public interest. Integrity can be intensified by means of self regulation and self awareness. A leader with high emotional and social intelligence can competently select the appropriate and rational decision in critical situations. These skills allow the administrative leader to promptly response to new and diverse ethical issues.5. ConclusionLeadership skills facilitate the administrative leader to distinguish between ethical and unethical acts. Effects of some skills overlap others. Technical, conceptual,interpersonal skills along with emotional and social intelligence contribute to proper understanding of ethical dilemmas, ethical decision making and dissemination and establishment of ethical values. Leaders enriched with these skills can show the way towards enhanced ethics oriented public service.From: Sonia Haq. Micro-blogging: Ethics and leadership skills in the public service[J]. Procedia Social and Behavioral Sciences 2011(15) , 2792–2796.译文公共服务的道德和领导技能摘要伦理在公共行政–全球–已经燃烧的问题恶化的情况。

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