08外文资料原文

毕业设计（论文）材料（二）外文翻译题目：公寓式住宅专业：土木工程班级：11土木姓名：***学号：**********指导教师：***滨州学院建筑工程系2015年2月25日住宅现状研究和发展趋势高亮;职瑜辉《陕西建筑》2009年第08期原文：China's residential development is affected by China's specific historical background. Since its foundation, the country specific economic system and economic policy constraints, China's residential from residential design, construction, distribution mode and live view has gradually changed. China's residential after development started late, from scratch, from small to large, from immature to healthy development, the hard way, but still rapid development. With the development of the national economy and the improvement of living standards, people have put forward higher requirements of the living environment. The function of the house is not the most at the beginning of the shelter from the wind and rain, and should meet the different demands of people at multiple levels. How to design residential residents live and work according to the changing demand, can make the residents live in happiness, green and energy saving and environmental protection, promote harmony between man and nature, is an important direction of research of modern residential building.Development status of residence in ChinaHousing is a multi-level, the overall development is not balanced and the low level of.Restricted by the level of economic development, our country from countryside to city, from the east to the west, the residential construction area per capita, design level, there are great differences, and the overall development level is relatively low. The developed areas in the development of backward regions and even residential from design to build quality, have a big gap, the developed area, the eastern part of the residential infrastructure construction quality is far higher than the central and western regions and remote mountain village. This imbalance of multi-level and development, not only widened the whole country gap between rich and poor, and affect the level of development of the entire national residential construction, but also to a certain extent inspired many social contradictions, affect the peace and stability of the society.Housing prices continued to rise, residents purchase pressure, the per capita area is small.In recent years, due to various reasons, China's residential prices continued to rise, the increase in the income of residents to offset the rising prices,residents purchase housing increasing pressure, relative to the previous case, the residents of the per capita residential area shrinking, although the social overall real estate area expands unceasingly, but many investors, real estate developers constantly the hoarding of land, real estate, constantly pushing prices, although a more residential, to buy residential people gradually reduce. Purchasing power of residents in residential to a certain extent, started to decline.Energy saving and environmental protection is poor, high energy consumption, serious environmental pollution.China residential and real estate development started late, but rapid development pace. A short span of ten years, has undergone a qualitative leap China property. Because of the design of the construction speed is too fast, and the environmental protection technology is backward, slow development of China residential construction and real estate on energy saving and environmental protection, residential energy consumption, energy loss, eliminate waste is difficult to get good treatment, therefore, not only cause a waste of energy, but also caused many environmental pollution, residents residential sustainable green living ideas to carry out.Overall residential design unreasonable, housing quality problems seriously.Accelerating the process of our residential construction, building residents growing area, many real estate developers, construction management personnel, for the progress of the project into account, continue to accelerate the construction process, and ignore the management and supervision of the quality of the project. In order to reduce the construction cost, not hesitate to use some inferior building materials, or reduce the building process, ignore the residential design and construction of the tight rigor, and the laws and regulations of the state in the residential and real estate construction is not perfect, are some people drilled legal funnel, or some laws and regulations have not been fully implemented, it is difficult to guarantee the quality and safety of residential buildings. Many residents in the residential occupancy, exist more Water Leakage, crack, or even a series of serious problems such as collapse, brought great damage and threat to people's life and property.The development trend of China's housingHousing towards the centralization, commercial development direction.Because our country land prices continue to rise, real estate businessmen and investors in the real estate construction, more inclined to high accumulation, thus, the residents of the residential construction towards the highly concentrated development trend. Moreover, with the increase of the nationalgovernment planning efforts on the city's residents, continuously for planning new residential areas, so, not only can make the limited land resources to be large-scale, scientific rational use, infrastructure construction and can facilitate the residents concentrated, so as to facilitate the whole residential area management, help to improve the lives of the residents quality,The quality and the taste of the residential requirements continue to improve.The improvement of people's living level, the overall quality of people continuously improve, the living concept has been from the original to take shelter and shelter from the cold dew, tend to be more spiritual entertainment and, therefore, more residents for their own housing continued to enhance taste, the low-end residential demand gradually saturated, demand forhigh-end residential villa increasing.Energy saving and environmental protection, green ecology is an important direction.China's reform and opening up after the economy has obtained the rapid development, but at the time of economic development, but also to our energy has brought enormous consumption, in recent years, China's energy pressure increasing, energy saving, is the urgent requirement of our country sustainable development. At the same time, the high-speed economic development, large population base, caused serious environmental pollution and damage to the environment, with the proposed development of the concept of ecological civilization in China, China's environmental protection green development path has been elevated to the strategic position, the residents of residential energy consumption and pollution of the environment is an important part of environmental pressure of energy in our country. Residential demand increasing, energy saving and environmental protection of the construction of green ecological residential, residential, will be China's development road.Suggestions on the development of residentialThe government should introduce relevant policies, increase the control of real estate market.The government should continue to improve laws and regulations and residential related, strengthen law enforcement efforts, increase the intensity of supervision, implement the relevant laws, increase the control of the real estate market, to guarantee the basic rights of residents.To increase the residential building support, encourage centralization.The introduction of preferential policies to encourage the relevant, increase the residential construction investment, increase the construction of basic facilities, residential areas, increase the residential construction management, strengthen the centralization, improve residents' living level.The development of energy-saving technology of green, green ecological residential construction, improve housing quality and good taste.Strengthen the research and development of environmental protection and energy saving technology in environmental protection, accelerate the core technology breakthrough, the introduction of construction technology and the advanced foreign ideas, in residential design and construction, with the new design concept, uses the environmental protection material, building perfect energy-saving facilities, reduce the energy consumption in the foundation to meet people's various needs, reduce pollution. At the same time, increase energy-saving awareness training to the residents, to encourage residents to energy-saving emission reduction, improve energy consumption in residential area, pollution control and management measures. Strengthen the green ecological degree of residential, to enhance the residential quality of life and taste.The building of a socialist ecological civilization, the construction of the socialist harmonious society, is the development of our society's requirements, adhere to the people-oriented, adhere to safeguard the vital interests of the people, is very important to promote the development of the concept of social harmony and stability. Residential related to the vital interests of millions of residents, the relationship between China's social stability and economic development vitality, therefore, the government and related institutions must strengthen to the residential construction management, perfect the relevant laws and regulations, intensify efforts to implement the. Continued research and development of the introduction of advanced science and technology, using the construction of advanced experiences, strengthen to residential capital investment, improve infrastructure system in the residential area. At the same time, strengthen the supervision to ensure the quality of residential construction, residential construction, maintenance of residents living in the most basic rights and security, let the people enjoy the fruits of social development, promoting social stability and harmony.翻译：我国的居民住宅发展受到我国特定的历史背景的影响。

（Sheaｒ waｌl ｓt ｒuctural desigｎ ofh ｉgh-ｌev ｅl fr ａmeworkＷｕ Jiche ｎgＡbstract ： In t ｈis pape ｒ the basic c ｏｎcepts of ｍａn ｐow ｅr ｆｒom th ｅ ｆra ｍｅ sh ｅａr w ａｌl str ｕc ｔｕｒｅ, analy ｓis of the ｓtruct ｕr ａｌ des ｉgn ｏf th ｅ c ｏnt ｅnt ｏｆ t ｈe fr ａme she ａr wall, in ｃｌudi ｎg the ｓeism ｉc wa ｌl she ａr spa本科毕业设计外文文献翻译学校代码： 10128学 号：题 目：Shear wall structural design of high-level framework 学生姓名： 学 院：土木工程学院 系 别：建筑工程系 专 业：土木工程专业（建筑工程方向） 班 级：土木08-（5）班 指导教师： (副教授)ｎratiｏdesign, ａnd a concrｅtｅｓtruｃtuｒe in thｅmｏst co ｍmonｌy useｄframe shear walｌstｒｕcturｅtｈｅdesign of p ｏiｎｔs to note.Keyworｄs: cｏncrｅｔｅ; fｒaｍｅshｅａｒwall sｔｒucｔｕre；hiｇh－risｅbuildｉｎｇsThe wall is aｍoｄern high－rｉｓe buiｌdiｎgs is an iｍpo ｒｔant buiｌdinｇconｔｅnt, the ｓize of thｅfraｍe sheａr wall must comｐly with buildｉng reguｌａtｉons. The pｒｉnｃipｌe is ｔhat the largeｒsｉzｅbｕt the thｉｃknessｍuｓt ｂｅsmaller gｅoｍetric featｕrｅｓshoｕlｄｂe ｐｒeｓented ｔo the pｌatｅ,ｔｈe forｃe is close to cylｉndrｉcal.Ｔhe waｌl sｈｅar wa ｌl strｕｃｔure ｉs a flaｔcomｐonent. Itｓeｘposure to tｈe force aｌoｎg ｔhe ｐlane leｖｅl of theｒole ofｓｈear and momｅｎt, must also take ｉｎtｏａccounｔthe veｒｔical preｓsure.Opeｒate unｄer thｅcomｂiｎed actｉｏn oｆbenｄing momeｎts and axial force aｎｄsheａr forcｅbｙthe caｎtilｅｖｅr deep beａm uｎder ｔｈe acｔion of the force leveｌｔo lｏo ｋinto ｔｈe bottom mouｎted on ｔhe basｉs of. Sheaｒｗaｌl ｉｓdiｖidｅｄinｔo a whole walｌand ｔheａssoｃiated ｓｈeａr wall in thｅactual project,a wholｅwａlｌfor ｅxａmpl ｅ, suｃh as ｇenｅraｌhｏusiｎｇｃonstｒuction in tｈe gablｅｏr fish bｏne strｕcture ｆｉlｍwａｌls ａnd small opｅningｓwall.Cｏupled Sｈeａr ｗalls are ｃonnｅcted bｙｔhｅcｏupｌing ｂeam shｅａr wall.Buｔｂecause tｈeｇｅnerａlｃｏupling beaｍstｉｆfness is less thaｎｔhe wall stiｆfnｅsｓof the lｉmbs，ｓｏ. Wａlｌliｍb aｌonｅis obviｏus.The ｃｅntral beam of tｈeｉnflｅｃtion pｏｉnｔtｏpay aｔtenｔiｏｎto tｈeｗaｌl pressｕre thａn the limiｔs of the lｉmb axis. Will forｍa shortｗiｄe beａms，widｅcolｕmn wａll liｍｂｓhear wａll ｏpｅnings toｏlarge ｃomｐonｅnt aｔbothｅn ｄs ｗith jｕst the domain of vａｒiabｌe crosｓ－ｓecｔｉon ro ｄin ｔhe intｅrｎａｌforcｅｓｕnder tｈｅaｃtioｎof maｎy Ｗalｌlｉmb iｎflｅcｔion point Ｔhｅｒeｆoｒe, ｔhe cａｌcula ｔions ａｎd consｔruction sｈouldAccordinｇtｏappｒoxiｍａｔe tｈe framｅstｒucｔure to ｃonsideｒ.Tｈe desｉｇｎof ｓhｅａr walls ｓhoulｄbe based on the cｈａractｅrisｔics ｏf ａvａｒｉｅty oｆwall itseｌｆ,ａnd dｉfferｅnｔmeｃhanical ch ａrａcteｒisｔｉcｓand requireｍents,wall oｆthｅinternａｌforceｄistrｉbutｉon and failurｅmoｄｅs ｏf sｐecific and cｏmprehensive ｃonｓideration of the design rｅinｆorcemｅnt aｎd stｒuctural measｕres. Ｆrame sｈear wall ｓｔrｕctuｒe deｓiｇn is to cｏｎsider the ｓtructｕre of the oｖerall ａnａｌysis for ｂoｔh dｉrecｔｉｏｎsｏｆthｅhｏrｉzontal and vｅrtiｃalｅfｆects. Oｂtain thｅinternal force ｉs reｑuirｅd in ａccｏrdancｅｗｉｔｈtｈe bias or paｒtｉal ｐull normal sｅcｔｉon forｃｅｃaｌculatiｏn.The waｌl strｕcture oｆtheｆｒame sｈear ｗall ｓｔructural dｅsign of ｔhe coｎtent frame hｉgh-rise buildings, in ｔhe actual ｐrｏjeｃｔiｎｔhｅuse of thｅｍoｓt seisｍic ｗａlls have suffiｃient quantitｉeｓto meｅt ｔheｌｉmitsｏf the lａyer displacement, the loｃation iｓｒelａtiｖely flexiblｅ. Seiｓmic wａll for cｏntinuous layout，ｆulｌ-length ｔhroｕgh．Should bｅdesigned to avoid the waｌl mutaｔioｎs ｉn limb ｌｅｎgth and alignment is noｔuｐａnd down the ｈolｅ. The samｅtｉme．Tｈe inｓide of ｔhe hole marginｓcｏlｕｍｎshｏｕld not ｂｅｌｅssｔhan３00mm ｉｎordｅｒtｏguaraｎteｅtheｌengtｈof the colｕｍn ａs the edgｅof tｈe coｍponent and constｒａiｎt eｄgｅcｏｍponeｎts．Thｅbi-direc ｔiｏnal laｔerａl forｃe ｒesiｓting strucｔurａl fｏrm of verticａl aｎｄhorｉzontaｌwalｌcoｎnected.Eａｃh ｏｔhｅr as ｔhe ａffiｎiｔｙof the shｅar wall. Ｆor ｏnｅ, two seismic frａme sｈe ａr ｗalｌｓ,ｅｖen beam highｒatio ｓhould noｔgreateｒthan 5 aｎd a height of nｏt less thaｎ400mm.Midline colｕmnａnd beａmｓ,wall ｍｉdline shouｌdｎoｔbe greaｔer tha ｎthe ｃoｌｕmｎwidｔｈof1/4，ｉn ordｅr ｔｏreｄuce thｅtoｒsional eｆfect of the sｅiｓmｉｃacｔion ｏnｔｈｅｃolｕmn．Oｔhｅrwｉsｅcan be taken tｏstrengthｅn theｓtirruprａｔｉo iｎｔhe cｏlｕmn tｏmake ｕp.If thｅshear wａｌl sheａｒsｐａn ｔhａnｔhe ｂig twｏ. Ｅveｎthe beａｍcro ｓs-heｉｇht ratiｏgreateｒthan 2.5, ｔhen tｈe design presｓｕｒe ｏf thｅｃｕt shoulｄnoｔmａkｅａｂig 0.2. Howevｅｒ, ｉf the sheａｒwallｓheａr sｐａｎｒatiｏof ｌess than two couｐlinｇｂeａms sｐan of ｌeｓs than ２．5, then the shear coｍｐres ｓiｏn rａｔiｏis noｔgreaｔer thａn 0.15. Thｅｏther haｎｄ，ｔhe bｏttom oｆthe fraｍe ｓhｅar walｌstructure ｔo enhａnce tｈｅdｅsign sｈould ｎoｔbe leｓs thaｎ２０0mmａnd noｔlesｓthaｎstorey 1/１6，othｅｒｐaｒtｓｓhｏulｄnot be lｅss than 160mm ａnd ｎｏt ｌｅss thaｎｓtoｒey １/20. Arounｄthe wall of the frame ｓhｅar ｗall strucｔure sｈｏulｄbe set ｔo the beａm or dark bｅamａnd the sｉｄe columｎｔｏform a borｄｅr. Ｈoｒizｏntａl ｄｉｓtrｉbuｔioｎoｆsｈear waｌls cａn from the sheａr effect，tｈｉs design wｈen ｂuilｄｉng higｈｅr longeｒor fｒaｍｅｓtructｕre reinfoｒcｅment shｏuld be aｐprｏpｒiatelｙincｒeａｓed, ｅspｅcｉａlｌy in the sｅnｓitivｅｐarts of the beam pｏsition ｏr teｍperaｔuｒe, stiffnｅsｓchａnge is besｔappｒopriatｅly increased, ｔｈeｎcｏnsidｅration sｈoulｄbe ｇｉveｎｔo the wａlｌvertｉcaｌreiｎforｃemeｎt,becaｕse ｉt is mａinly fｒom the bｅnding efｆecｔ, aｎｄtake in ｓome ｍｕlti-ｓtorｅｙshｅａｒｗａll structuｒereinforcｅｄreｉnｆorceｍent rate -likｅlｅsｓconｓtｒained edgｅｏｆｔhｅcomｐonent or components reinforｃemeｎt of thｅedge ｃomｐｏnent.Referｅnces: [1 sad Hａyaｓhi,He Yaming. Ｏn the shorｔshｅar ｗall ｈigh-riｓe bｕilｄinｇｄesign ［J]．Kｅｙｕaｎ, 2008, (O2).高层框架剪力墙结构设计吴继成摘要: 本文从框架剪力墙结构设计的基本概念人手, 分析了框架剪力墙的构造设计内容, 包括抗震墙、剪跨比等的设计, 并出混凝土结构中最常用的框架剪力墙结构设计的注意要点。

中文2570字外文文献翻译院、部：电气与信息工程学院学生姓名：指导教师：职称讲师专业：自动化班级： 09级01班完成时间： 2013.06.06出处：Computing, Communication, Control, and Management, 2008. CCCM'08. ISECS International Colloquium on. IEEE, 2008, 1: 538-541Component-based Safety Computer of Railway SignalInterlocking System1 IntroductionSignal Interlocking System is the critical equipment which can guarantee traffic safety and enhance operational efficiency in railway transportation. For a long time, the core control computer adopts in interlocking system is the special customized high-grade safety computer, for example, the SIMIS of Siemens, the EI32 of Nippon Signal, and so on. Along with the rapid development of electronic technology, the customized safety computer is facing severe challenges, for instance, the high development costs, poor usability, weak expansibility and slow technology update. To overcome the flaws of the high-grade special customized computer, the U.S. Department of Defense has put forward the concept：we should adopt commercial standards to replace military norms and standards for meeting consumers’demand [1]. In the meantime, there are several explorations and practices about adopting open system architecture in avionics. The United Stated and Europe have do much research about utilizing cost-effective fault-tolerant computer to replace the dedicated computer in aerospace and other safety-critical fields. In recent years, it is gradually becoming a new trend that the utilization of standardized components in aerospace, industry, transportation and other safety-critical fields.2 Railways signal interlocking system2.1 Functions of signal interlocking systemThe basic function of signal interlocking system is to protect train safety by controlling signal equipments, such as switch points, signals and track units in a station, and it handles routes via a certain interlocking regulation.Since the birth of the railway transportation, signal interlocking system has gone through manual signal, mechanical signal, relay-based interlocking, and the modern computer-based Interlocking System.2.2 Architecture of signal interlocking systemGenerally, the Interlocking System has a hierarchical structure. According to the function of equipments, the system can be divided to the function of equipments; the system can be divided into three layers as shown in figure1.Man-Machine Interface layerInterlocking safety layerImplementation layerOutdoorequiptmentsFigure 1 Architecture of Signal Interlocking System3 Component-based safety computer design3.1 Design strategyThe design concept of component-based safety critical computer is different from that of special customized computer. Our design strategy of SIC is on a base of fault-tolerance and system integration. We separate the SIC into three layers, the standardized component unit layer, safety software layer and the system layer. Different safety functions are allocated for each layer, and the final integration of the three layers ensures the predefined safety integrity level of the whole SIC. The three layers can be described as follows:(1) Component unit layer includes four independent standardized CPU modules. A hardware “SAFETY AND” logic is implemented in this year.(2) Safety software layer mainly utilizes fail-safe strategy and fault-tolerant management. The interlocking safety computing of the whole system adopts two outputs from different CPU, it can mostly ensure the diversity of software to hold with design errors of signal version and remove hidden risks.(3) System layer aims to improve reliability, availability and maintainability by means of redundancy.3.2 Design of hardware fault-tolerant structureAs shown in figure 2, the SIC of four independent component units (C11, C12, C21, C22). The fault-tolerant architecture adopts dual 2 vote 2 (2v2×2) structure, and a kind of high-performance standardized module has been selected as computing unit which adopts Intel X Scale kernel, 533 MHZ.The operation of SIC is based on a dual two-layer data buses. The high bus adopts thestandard Ethernet and TCP/IP communication protocol, and the low bus is Controller Area Network (CAN). C11、C12 and C21、C22 respectively make up of two safety computing components IC1 and IC2, which are of 2v2 structure. And each component has an external dynamic circuit watchdog that is set for computing supervision and switching.Diagnosis terminal C12C21C22&&Watchdog driverFail-safe switch Input modle Output Modle InterfaceConsole C11High bus(Ether NET)Low bus (CAN)Figure 2 Hardware structure of SIC3.3 Standardized component unitAfter component module is made certain, according to the safety-critical requirements of railway signal interlocking system, we have to do a secondary development on the module. The design includes power supply, interfaces and other embedded circuits.The fault-tolerant processing, synchronized computing, and fault diagnosis of SIC mostly depend on the safety software. Here the safety software design method is differing from that of the special computer too. For dedicated computer, the software is often specially designed based on the bare hardware. As restricted by computing ability and application object, a special scheduling program is commonly designed as safety software for the computer, and not a universal operating system. The fault-tolerant processing and fault diagnosis of the dedicated computer are tightly hardware-coupled. However, the safety software for SIC is exoteric and loosely hardware-coupled, and it is based on a standard Linux OS.The safety software is vital element of secondary development. It includes Linux OS adjustment, fail-safe process, fault-tolerance management, and safety interlocking logic. The hierarchy relations between them are shown in Figure 4.Safety Interlock LogicFail-safe processFault-tolerance managementLinux OS adjustmentFigure 4 Safety software hierarchy of SIC3.4 Fault-tolerant model and safety computation3.4.1 Fault-tolerant modelThe Fault-tolerant computation of SIC is of a multilevel model:SIC=F1002D(F2002(S c11,S c12),F2002(S c21,S c22))Firstly, basic computing unit Ci1 adopts one algorithm to complete the S Ci1, and Ci2 finishes the S Ci2via a different algorithm, secondly 2 out of 2 (2oo2) safety computing component of SIC executes 2oo2 calculation and gets F SICi from the calculation results of S Ci1 S Ci2, and thirdly, according the states of watchdog and switch unit block, the result of SIC is gotten via a 1 out of 2 with diagnostics (1oo2D) calculation, which is based on F SIC1 and F SIC2.The flow of calculations is as follows:(1) S ci1=F ci1 (D net1,D net2,D di,D fss)(2) S ci2=F ci2 (D net1,D net2,D di,D fss)(3) F SICi=F2oo2 (S ci1, S ci2 ),(i=1,2)(4) SIC_OutPut=F1oo2D (F SIC1, F SIC2)3.4.2 Safety computationAs interlocking system consists of a fixed set of task, the computational model of SIC is task-based. In general, applications may conform to a time-triggered, event-triggered or mixed computational model. Here the time-triggered mode is selected, tasks are executed cyclically. The consistency of computing states between the two units is the foundation of SIC for ensuring safety and credibility. As SIC works under a loosely coupled mode, it is different from that of dedicated hardware-coupled computer. So a specialized synchronization algorithm is necessary for SIC.SIC can be considered as a multiprocessor distributed system, and its computational model is essentially based on data comparing via high bus communication. First, an analytical approach is used to confirm the worst-case response time of each task. To guarantee the deadline of tasks that communicate across the network, the access time and delay of communication medium is set to a fixed possible value. Moreover, the computational model must meets the real time requirements of railway interlocking system, within the system computing cycle, we set many check points P i(i=1,2,... n) , which are small enough for synchronization, and computation result voting is executed at each point. The safetycomputation flow of SIC is shown in Figure 5.S t a r tS t a r t０τ１τ２τ１Ｐ２Ｐ０τ１τ２τ１Ｐ２Ｐ０Ｔ０ＴＣ1i Ｃi 21Ｔ2Ｔ1Ｔ2Ｔ…………………n+1τn+1τn Ｐn Ｐn τn τclockclockS a f e t y f u n c t i o n s T a s k s o f i n t e r l o c k i n g l o g i c i :p:c h e c k p o i n t I n i t i a l i z e S y n c h r o n i z a t i o n G u a r a n t e e S y n c h r o n o u s T i m e t r i g g e rFigure 5 Safety computational model of SIC4. Hardware safety integrity level evaluation4.1 Safety IntegrityAs an authoritative international standard for safety-related system, IEC 61508 presents a definition of safety integrity: probability of a safety-related system satisfactorily performing the required safety functions under all the stated conditions within a stated period of time. In IEC 61508, there are four levels of safety integrity are prescribe, SIL1～SIL4. The SIL1 is the lowest, and SIL4 highest.According to IEC 61508, the SIC belongs to safety-related systems in high demand or continuous mode of operation. The SIL of SIC can be evaluated via the probability of dangerous per hour. The provision of SIL about such system in IEC 61508, see table 1.Table 1-Safety Integrity levels: target failure measures for a safety function operating in high demand orcontinuous mode of operationSafety Integrity levelHigh demand or continuous mode of Operation (Probability of a dangerous Failure per hour)4 ≥10-9 to ＜10-83 ≥10-8 to ＜10-72 ≥10-7 to ＜10-61 ≥10-6 to ＜10-54.2 Reliability block diagram of SICAfter analyzing the structure and working principle of the SIC, we get the bock diagram of reliability, as figure 6.2002200220022002NET1NET2NET1NET2λ=1×10-7DC=99%Voting=1002D λ=1×10-7DC=99%Voting=1002D λ=1×10Β=2%βD =1%DC=99%Voting=1002D High busLogic subsystem Low busFigure 6 Block diagram of SIC reliability5. ConclusionsIn this paper, we proposed an available standardized component-based computer SIC. Railway signal interlocking is a fail-safe system with a required probability of less than 10-9 safety critical failures per hour. In order to meet the critical constraints, fault-tolerant architecture and safety tactics are used in SIC. Although the computational model and implementation techniques are rather complex, the philosophy of SIC provides a cheerful prospect to safety critical applications, it renders in a simpler style of hardware, furthermore, it can shorten development cycle and reduce cost. SIC has been put into practical application, and high performance of reliability and safety has been proven.模块化安全铁路信号计算机联锁系统1概述信号联锁系统是保证交通安全、提高铁路运输效率的关键设备。

英文翻译1外文原文出处：B. W. SOEMARDI, I. SOENARYO, E. WAHYUDI, The Role and Function of Mandor in Construction Project Organization in Indonesia. Procedia Engineering, 2011, 14: 859–864在印尼建设项目中领班的角色和作用1.前言在塑造行业建筑工人起到了很大的作用。

不仅是因为工人构成了很大一部分的建筑成本和许多工作时间，相对于物质资本而言也更容易使管理受到影响（Khoramshahi，2006）。

随着国民经济的发展，最近通过对印度尼西亚BPS统计的研究表明建筑就业形势正在稳步发展，目前这个行业拥有员工超过500万人，约占所有行业总员工的 5.3%（BPS，2010）。

印尼建筑工人这一重要角色应该得到更多的关注，为了更好地发挥它在行业中的作用。

尽管有前途有发展的产业并没有改变多少，但一点点的改变也反映了在印尼建筑行业中对工人管理的改善。

例如，建筑工人的教育水平仍然很低,有超过50%的建筑工人只有小学毕业生的教育水平，更糟糕的是，他们中有 1.5%的工人从未接受过任何的正规教育（Soemardi，2009）。

更重要的是，也反映了已经注册和认证过的技术工人显著少于施工质量差的工人（lpjkn，2010）。

事实上，对于政府和企业要解决教育问题是一个非常艰巨的任务，也许策划一个战略方针将会是确定和利用施工管理最具影响力的要素。

在这种情况下，企业可以让建筑工头发挥他们最大的功能和作用，其中关键就是提高对工人的管理。

综上问题所述，本文的目的是确定工头在印尼建筑业上的功能和作用。

工头在印尼建筑业中的特点和独特地位也是被重点考虑的。

2.印尼建筑工人的管理在印度尼西亚，建筑工人都不是商业工人，在传统上，尤其是 Java都是来自农业部门。

一个开创性的研究Sjahrir（1995）注意到了从传统农业职业转变而来的建筑工人。

外文资料与中文翻译外文资料：Intelligent thermal energy meter controllerAbstractA microcontroller based, thermal energy meter cum controller (TEMC) suitable for solar thermal systems has been developed. It monitors solar radiation, ambient temperature,fluid flow rate, and temperature of fluid at various locations of the system and computes the energy transfer rate. It also controls the operation of the fluid-circulating pumpdepending on the temperature difference across the solar collector field. The accuracyof energy measurement is ±1.5%. The instrument has been tested in a solar water heatingsystem. Its operation became automatic with savings in electrical energy consumption ofpump by 30% on cloudy days.1 IntroductionSolar water heating systems find wide applications in industry to conserve fossil fuel like oil, coal etc. They employ motor driven pumps for circulating water with on-offcontrollers and calls for automatic operation. Reliability and performance of the system depend on the instrumentation and controls employed. Multi-channel temperature recorders, flow meters, thermal energy meters are the essential instruments for monitoring andevaluating the performance of these systems. A differential temperature controller (DTC) is required in a solar water heating system for an automatic and efficient operation ofthe system. To meet all these requirements, a microcontroller based instrument wasdeveloped. Shoji Kusui and Tetsuo Nagai [1] developed an electronic heat meter formeasuring thermal energy using thermistors as temperature sensors and turbine flow meter as flow sensor.2 Instrument detailsThe block diagram of the microcontroller (Intel 80C31) based thermal energy meter cum controller is shown in Fig. 1. RTD (PT100, 4-wire) sensors are used for the temperaturemeasurement of water at the collector field inlet, outlet and in the tank with appropriate signal conditioners designed with low-drift operational amplifiers. A precision semiconductor temperature sensor (LM335) is used for ambient temperature measurement. A pyranometer, having an output voltage of 8.33 mV/kW/m2, is used for measuring the incident solar radiation. To monitor the circulating fluid pressure, a sensor with 4–20 mA output is used. This output is converted into voltage using an I-V converter. All these outputsignals are fed to an 8-channel analog multiplexer (CD4051). Its output is fed to adual-slope 12-bit A/D converter (ICL7109). It is controlled by the microcontroller through the Programmable Peripheral Interface (PPI-82C55).Fig. 1. Block diagram of thermal energy meter cum controller.A flow sensor (turbine type) is used with a signal conditioner to measure the flowrate. Its output is fed to the counter input of the microcontroller. It is programmed tomonitor all the multiplexed signals every minute, compute the temperature difference,energy transfer rate and integrated energy. A real-time clock with MM58167 is interfacedto the microcontroller to time-stamp the logged data. An analog output (0–2 V) is provided using D/A converter (DAC-08) to plot both the measured and computed parameters. A 4×4 matrix keyboard is interfaced to the microcontroller to enter the parameters like specificheat of liquid, data log rate etc. An alphanumeric LCD display (24-character) is alsointerfaced with the microcontroller to display the measured variables. The serialcommunication port of the microcontroller is fed to the serial line driver and receiver(MAX232). It enables the instrument to interface with the computer for down-loading thelogged data. A battery-backed static memory of 56K bytes is provided to store the measured parameters. Besides data logging, the instrument serves as a DTC. This has been achievedby interfacing a relay to the PPI. The system software is developed to accept thedifferential temperature set points (ΔT on and ΔT off) from the keyboard. An algorithmsuitable for on-off control having two set-points is implemented to control the relays.3 Instrument calibrationThe amount of energy transferred (Q) is :Where = mass flows rate of liquid kg/s ; V = volumetric flow rate (l/h) ; ρ= density of water (kg/l) ; Cp = specific heat (kJ/kg°C); and ΔT = temperature difference between hot and cold (°C).The accuracy in energy measurement depends on the measurement accuracy of individual parameters. Temperature measurement accuracy depends on the initial error in the sensorand the error introduced due to temperature drifts in the signal conditioners and the A/D converter. The temperature sensor is immersed in a constant temperature bath (HAAKE B ath-K, German), whose temperature can be var ied in steps of 0.1°C. A mercury glass thermometer (ARNO A MARELL, Germany) with a resolution of 0.05°C is also placed along with PT100 sensor in the bath. This is compared with the instrument readings. The accuracy of the instrument in temperature measurem ent is ±0.1°C. Hence, the accuracy in differential temperature measurement is ±0.2°C.The flow sensor having a maximum flow rate of 1250 l/h is used for flow measurement.It is calibrated by fixing it in the upstream of a pipeline of length 8 m. The sensor output is connected to a digital frequency counter to monitor the number of pulses generated withdifferent flow rates. Water collected at the sensor outlet over a period is used forestimating the flow rate. The K-factor of the sensor is 3975 pulses/l. The uncertaintyin flow measurement is ±0.25% at 675 l/h. Uncertainties in density and specific heat ofwater are ±0.006 kg/l and ±0.011 kJ/kg°C respectively.Maximum amount of energy collection (Q) = 675×0.98×4.184×15/3600 = 11.53kW. Uncertainty in energy measurementωq/Q = [(ωv/V)2 + (ωρ/ρ)2 + (ωcp/Cp)2+(ωt/T )2]1/2.Inaccuracy in electronic circuitry is ±0.03 kW.The net inaccuracy in energy measurement is ±1.5%4 Field testThe instrument is incorporated in a solar water heating system as shown in Fig. 2.It consists of five solar flat plate collectors having an absorber area of 1.6 m2 each. The absorber is a fin and tube extruded from aluminium and painted with matt black paint. The collectors are mounted on a rigid frame facing south at an angle equal to the latitude of Bangalore (13°N). They are arranged in parallel configuration and connected to athermally insulated 500 l capacity storage tank. A 0.25 hp pump is used for circulatingthe water through the collector field. All the pipelines are thermally insulated. Thetemperature sensors and the flow sensor are incorporated in the system as shown in Fig.2. The data on solar radiation, ambient temperature, water flow rate, solar collector inlet and outlet temperatures and the system heat output are monitored at regular intervals.Fig. 2. Solar water heating system with thermal energy meter cum controller.The performance of the solar water heating system with TEMC on a partial cloudy dayis shown in Fig. 3. It is observed that DTC switched OFF the pump around 14:40 h as thereis no further energy gain by the collector field. This in turn reduced the heat lossesfrom the collector to ambient. Experiments are conducted with and without DTC o n both sunny and cloudy days. The DTC operated system shows the savings in electrical energy by 30%on a partial cloudy day and 8% on a sunny day. The variation in system output with andwithout DTC i s around 3%. Thus the controller has not only served as an energy conservation device, but also switches ON/OFF the system automatically depending on the availabilityof solar radiation. The collector field output (shown in Fig. 3) is calculated by measuring the fluid flow rate using volumetric method and the temperature difference with anotherpair of standard thermometers. It is 16.86 kWh. It is compared with the instrument reading 17.18 kWh. Thus, the deviation is 1.9%. Fig. 3 shows that the solar collector fieldefficiency is 54% when the incident solar irradiation is 31.75 kWh.Fig. 3. Performance of SWH system with TEMC on a partial cloudy day.5 Concluding remarksTEMC is used as on-line instrument in solar water heating systems for the measurement of thermal energy, temperature, flow rate with simultaneous control on the operation ofthe pump t o save electrical energy and enhance the thermal energy collection. Since several options are provided in the instrument, it can be used for monitoring the energy transfer rate in other thermal systems.AcknowledgementsThe authors are thankful to Department of Science and Technology, Govt. of India forproviding the financial assistance to carry out the above work.References1. Shoji Kusui, Tetsuo Nagai. An electronic integrating heat meter. IEEE Trans. onInstrumentation and Measurement, 1990;39(5):785-789.中文翻译：智能热能表控制器摘要适用于太阳能热系统的单片机热能表控制器（TEMC）已经研制成功。

土木工程外文翻译题目：高层建筑学院：兰州交通大学博文学院专业：土木工程班级：08级土木5班学号：学生姓名：指导教师：完成日期：2012年3月11号一、外文原文：Tall Building StructureTall buildings have fascinated mankind from the beginning of civilization, their construction being initially for defense and subsequently for ecclesiastical purposes. The growth in modern tall building construction, however, which began in the 1880s, has been largely for commercial and residential purposes.Tall commercial buildings are primarily a response to the demand by business activities to be as close to each other, and to the city center, as possible, thereby putting intense pressure on the available land space. Also, because they form distinctive landmarks, tall commercial buildings are frequently developed in city centers as prestige symbols for corporate organizations. Further, the business and tourist community, with its increasing mobility, has fuelled a need for more, frequently high-rise, city center hotel accommodations.The rapid growth of the urban population and the consequent pressure on limited space have considerably influenced city residential development. The high cost of land, the desire to avoid a continuous urban sprawl, and the need to preserve important agricultural production have all contributed to drive residential buildings upward.Ideally, in the early stages of planning a building, the entire design team, including the architect, structural engineer, and services engineer, should collaborate to agree on a form of structure to satisfy their respective requirements of function, safety and serviceability, and servicing. A compromise between conflicting demands will be almost inevitable. In all but the very tallest structures, however, the structural arrangement will be subservient to the architectural requirements of space arrangement and aesthetics.The two primary types of vertical load-resisting elements of tall buildings are columns and walls, the latter acting either independently as shear walls or in assemblies as shear wall cores. The building function will lead naturally to the provision of walls to divide and enclose space, and of cores to contain and conveyservices such as elevators. Columns will be provided, in otherwise unsupported regions, to transmit gravity loads and, in some types of structure, horizontal loads also.The inevitable primary function of the structural elements is to resist the gravity loading from the weight of the building and its contents. Since the loading on different floors tends to be similar, the weight of the floor system per unit floor area is approximately constant, regardless of the building height. Because the gravity load on the columns increases down the height of a building, the weight of columns per unit area increases approximately linearly with the building height.The highly probable second function of the vertical structural elements is to resist also the parasitic load caused by wind and possibly earthquakes, whose magnitudes will be obtained from National Building Codes or wind tunnel studies. The bending moments on the building caused by these lateral forces increase with at least the square of the height, and their effects will become progressively more important as the building height increases.Once the functional layout of the structure has been decided, the design process generally follows a well defined iterative procedure. Preliminary calculations for member sizes are usually based on gravity loading augmented by an arbitrary increment to account for wind forces. The cross-sectional areas of the vertical members will be based on the accumulated loadings from their associated tributary areas, with reductions to account for the probability that not all floors will be subjected simultaneously to their maximum live loading. The initial sizes of beams and slabs are normally based on moments and shears obtained from some simple method of gravity load analysis, or from codified mid and end span values. A check is then made on the maximum horizontal deflection, and the forces in the major structural members, using some rapid approximate analysis technique. If the deflection is excessive, or some of the members are inadequate, adjustments are made to the member sizes or the structural arrangement. If certain members attract excessive loads, the engineer may reduce their stiffness to redistribute the load to less heavily stressed components. The procedure of preliminary analysis, checking, andadjustment is repeated until a satisfactory solution is obtained.Invariably, alterations to the initial layout of the building will be required as the client's and architect's ideas of the building evolve. This will call for structural modifications, or perhaps a radical rearrangement, which necessitates a complete review of the structural design. The various preliminary stages may therefore have to be repeated a number of times before a final solution is reached.Speed of erection is a vital factor in obtaining a return on the investment involved in such large-scale projects. Most tall buildings are constructed in congested city sites, with difficult access; therefore careful planning and organization of the construction sequence become essential. The story-to-story uniformity of most multistory buildings encourages construction through repetitive operations and prefabrication techniques. Progress in the ability to build tall has gone hand in hand with the development of more efficient equipment and improved methods of construction.Earthquake FaultsThe origin of an earthquakeAn earthquake originates on a plane of weakness or a fracture in the earth's crust, termed a "fault". The earth on one side of the fault slides or slips horizontally and /or vertically with respect to the earth on the opposite side, and this generates a vibration that is transmitted outward in all directions. This vibration constitutes the earthquake.The earthquake generally originates deep within the earth at a point on the fault where the stress that produces the slip is a maximum. This point is called the hypocenter or focus and the point on the earth's surface directly above this point is called the epicenter. The main or greatest shock is usually followed by numerous smaller aftershocks. These aftershocks are produced by slippage at other points on the fault or in the fault zone.Types of earthquake faultsFaults are classified in accordance with the direction and nature of the relative displacement of the earth at the fault plane. Probably the most common type is the strike-slip fault in which the relative fault displacement is mainly horizontal across anessentially vertical fault plane. The great San Andreas fault in California is of the type. Another type is termed a normal fault — when the relative movement is in an upward an downward direction on a nearly vertical fault plane. The great Alaskan earthquake of 1964 was apparently of this type. A less common type is the thrust fault — when the earth is under compressive stress across the fault and the slippage is in an upward and downward direction along an inclined fault plane. The San Fernando earthquake was generated on what has usually been classified as a thrust fault, although there was about as much lateral slippage as up and down slippage due to thrust across the inclined fault plane. Some authorities refer to this combined action as lateral thrust faulting. The compressive strain in the earth of the San Fernando Valley floor just south of the thrust fault was evidenced in many places by buckled sidewalks and asphalt paving.Forces exerted by an earthquakeSlippage along the fault occurs suddenly. It is a release of stress that has gradually built-up in the rocks of the earth's crust. Although the vibrational movement of the earth during an earthquake is in all directions, the horizontal components are of chief importance to the structural engineer. These movements exert forces on a structure because they accelerate. This acceleration is simply a change in the velocity of the earth movement. Since the ground motion in an earthquake is vibratory, the acceleration and force that it exerts on a structure reverses in direction periodically, at short intervals of time.The structural engineer is interested in the force exerted on a body by the movement of the earth. This may be determined from Newton's second law of motion ' which may be stated in the following form:F=MaIn which F is a force that produces an acceleration a when acting on a body of mass M. This equation is nondimensional. For calculations M is set equal to W/g, then:F=W/g*a (1)In which F is in pounds, a is in feet per second per second, W is the weight of thebody also in pounds and g is the acceleration of gravity, which is 32.2 feet per second per second.Equation (1) is empirical. It simply states the experimental fact that for a free falling body the acceleration a is equal to g and the acceleration force F is then equal to the weight W.For convenience, the acceleration of an earthquake is generally expressed as a ratio to the acceleration of gravity. This ratio is called a seismic coefficient. The advantage of this system is that the force exerted on a body by acceleration is simply the corresponding seismic coefficient multiplied by the weight of the body. This is in accordance with Equation (1) in which a/g is the seismic coefficient.Activity of faultsAll faults are not considered to present the same hazard. Some are classified as "active" since it is believed that these faults may undergo movement from time to time in the immediate geologic future. Unfortunately in the present state-of-the-art there is a good deal of uncertainty in the identification of potentially active faults. For example, the fault that generated the San Fernando earthquake did not even appear on any published geological maps of the area. This fault was discovered to be active only when it actually slipped and ruptured the ground surface. Accordingly the identification of active faults and geologically hazardous areas for land use criteria and for hazard reduction by special engineering may be of questionable value.Only in very recent years have geologists begun to try to evaluate the potential activity of faults that have no historical record of activity. By close inspection of a fault, visible in the side walls of a trench that cuts across the fault, it is sometimes possible to determine if it has been active in recent times. For example, if the trace of the fault extends through a recent alluvial material, then there must have been slippage since that material was deposited. However fault ruptures may be very difficult or impossible to see in imbedded material such as sand and gravel. Also of course the location of the fault must be known and it must reach the surface of the ground in order to inspect it by trenching.Evidence of the historical activity of a fault may sometimes be obtained byobserving the faulting of geologically young deposits exposed in a trench. Such deposits are generally bedded and well consolidated so that fault rupture can easily be seen.The approximate time of formation of a fault rupture or scarp has in some cases been determined by radiocarbon analysis of pieces of wood found in the rupture or scarp.In addition to evidence of young fault activity obtained by trenching, there also may be topographic evidence of young faulting such as is obvious along the San Andreas fault. Vertical aerial photographs are one of the most important methods for finding topographic evidence of active faults. This evidence, which includes scarps, offset channels, depressions, and elongated ridges and valleys, is produced by fault activity. The age of these topographic features and therefore the time of the fault activity, can be estimated by the extent to which they are weathered and eroded.二、外文译文：高层建筑结构高楼大厦已经着迷，从人类文明的开始，其建设是国防和最初其后教会的目的。

外文文献翻译（2012届）学生姓名学号********专业班级计算机科学与技术08-5班指导教师微软Visual Studio1微软Visual StudioVisual Studio 是微软公司推出的开发环境，Visual Studio可以用来创建Windows平台下的Windows应用程序和网络应用程序，也可以用来创建网络服务、智能设备应用程序和Office 插件。

Visual Studio是一个来自微软的集成开发环境IDE（inteqrated development environment），它可以用来开发由微软视窗，视窗手机，Windows CE、.NET框架、.NET精简框架和微软的Silverlight支持的控制台和图形用户界面的应用程序以及Windows窗体应用程序，网站，Web应用程序和网络服务中的本地代码连同托管代码。

Visual Studio包含一个由智能感知和代码重构支持的代码编辑器。

集成的调试工作既作为一个源代码级调试器又可以作为一台机器级调试器。

其他内置工具包括一个窗体设计的GUI应用程序，网页设计师，类设计师，数据库架构设计师。

它有几乎各个层面的插件增强功能，包括增加对支持源代码控制系统（如Subversion和Visual SourceSafe）并添加新的工具集设计和可视化编辑器，如特定于域的语言或用于其他方面的软件开发生命周期的工具（例如Team Foundation Server的客户端：团队资源管理器）。

Visual Studio支持不同的编程语言的服务方式的语言，它允许代码编辑器和调试器（在不同程度上）支持几乎所有的编程语言，提供了一个语言特定服务的存在。

内置的语言中包括C/C + +中（通过Visual C++）,（通过Visual ），C＃中（通过Visual C＃）和F＃（作为Visual Studio 2010），为支持其他语言，如M,Python,和Ruby等，可通过安装单独的语言服务。

本科毕业设计（论文）外文参考文献译文及原文学院材料与能源学院专业微电子学年级班别2009级（01）班学号3109007456学生姓名谭文海指导教师刘振2013 年06 月08日目录外文参考文献译文 (1)角多样性无向无线红外通信 (1)摘要 (1)介绍 (1)总结 (9)外文参考文献译文角多样性无向无线红外通信摘要我们提纲的是使用射角分集无向无线红外通信系统的好处和机遇。

多个发射机束和多个窄视场接收器减少的信道路径损耗、多路径失真,和背景噪声,从而导致改进范围。

我们也讨论对多元素角多样性系统,包括信道特性和次优的检测技术的实际问题。

也考虑了最大比结合度提供角多样性系统近最优性能高达100 Mb / s。

一个原型角多样性的红外通信系统的设计和性能也讨论了。

这个原型可以超过一个4米的范围保持70Mb/s每Pe.索引词－光通信，无线局域网。

介绍高速无线通信内部建筑可以通过使用非向性红外线连接器来获取。

非向性连接器，每个点由宽光束发射器和宽视场(FOV)接收器，需要消除个点的发射机和接收器组成的。

如果他们被设计成使用非视距(LOS)路径(通过照明天花板或者墙壁)代替,或者除了,los 路径，这样的连接会变得更加稳健。

如附图1(a)描述非向性红外连接的传统方法。

一个探测器在宽视场里收集不必要的环境光度以及所需的信号。

稳定的光源，如太阳和白炽灯，导致白色，近似于高斯散粒噪声；调制光源，如荧光灯，引起周期平稳的噪声。

同样，一个宽视场接收机不仅收集主要照明点，还包括已经经历了两个或两个以上或因此延迟的反射的信号。

这个过程,同时增加收集信号能力,介绍了多路径失真。

我们考虑多波束发射机和多个非成象的接收器的使用，如附图1(b),一个探测阵列窄视拨的探测器，跟同样的视场结合起来作为单个的宽视场探测器，它能拒档周围的不能组成单个的光。

更多的是，因为位于同一个视场作为主要的信号更小的一部分的光被耽搁，会降低多路径失真。

相对于单一的宽束发射机和特别有效结合窄视场接收器，使用多个光束会减少路径损耗，因为这些接收器能收集集中信号而拒挡更多的漫射噪声来源。

e c o l o g i c a l e n g i n e e r i n g 28(2006124–130a v a i l ab l e a t w w w.sc i e n c ed i re c t.c omj o u r n a l h o m e p a g e :w w w.e l s e v i e r.c o m /l o c a t e /e c o l e n gPlant-biofilm oxidation ditch for in situ treatm ent of polluted watersQi-Tang Wu a ,∗,Ting Gao a ,Shucai Zeng a ,Hong Chua ba College of Natural Resources and Environment,South China Agricultural University,Guangzhou 510642,ChinabDepartment of Civil and Structural Engineering,Hong Kong Polytechnic University,Hung Hom,Kowloon,Hong Kong SAR,Chinaa r t i c l ei n f o Article history:Received 17December 2005Received in revised form 16May 2006Accepted 18May 2006Keywords:Plant-biofilm oxidation ditch (PBFODIn situWastewater treatmenta b s t r a c tEutrophication of surface water bodies is a problem of increasing environmental and ecolog-ical concern worldwide and is particularly serious in China.In the present study,oxidation ditches were connected to a lake receiving municipal sewage sludges.T wo 24m 2(width 2m,length 12mparallel plastic oxidation ditches material were installed on a lake near the inlet of the municipal sewage.Zizania caduciflora and Canna generalis were grown in the ditches with plastic floating supporters for the removal of N and P from the sewage.The experiment was conducted firstly with municipal sewage in autumn–winter seasons for about 150daysunder the following conditions:2m 3/h influent flow,0.75kW jet-flow aerator(air/water of 5,18h HRT (hydrological retention timeand a return ratio of 10.Then it was run with the polluted lake water in summer–autumn for about 160days with an aerator of 1.25kW and an influent of 6m 3/h (air/water 3.3,HRT 6h.The performance was quite stable during the experimental period for the municipal sewage treatment.The average removal rates of COD (chemical oxygen demand,SS (suspended solids,TP (total phosphorus,NH 4+-N and inorganic-N were 70.6,75.8,72.6,52.1and50.3%,respectively.For the polluted lake water treatment,the average concentrations of COD,NH 4+-N and TP were 42.7,13.1and 1.09mg/L,respectively,in the influent and were 25.1,6.4and 0.38mg/L,respectively,in the effluent.The capacity of the plants to remove N and P by direct uptake was limited,but the indi-rect mechanisms also occurred.The proposed process,transforming the natural lake into a wastewater treatment plant,could evidently reduce the costs of the sewage collection,the land space requirement and the construction compared with conventional sewage treat-ment plants,and is especially suited to conditions in south China and south-east Asia.©2006Elsevier B.V .All rights reserved.1.IntroductionMany water bodies are subject to eutrophication due to eco-nomic constraints in reducing point sources of nutrients and/or to a high proportion of diffuse sources,and the prob-lem is particularly common in China because the proportion of treated municipal sewage is still low due to the relatively high capital investmentrequired.Accordingly,43.5%of 130investi-gated major lakes in China were found to be highly eutrophied∗Corresponding author .Tel.:+862085280296;fax:+862085288326.E-mail address:qitangwu@ (Q.-T.Wu.and 45%were of intermediate status (Li et al.,2000.These pol-luted lakes were mainly located in economically developed regions and especially around cities where large amounts of municipal sewage are discharged without appropriate treat-ment.Increasingly,natural or constructed wetlands,including buffer zones(Correll,2005,are being used for removal of pol-lutants from wastewater or for treatment of stormwater runoff from agricultural land and other non-point sources (Mitsch ete c o l o g i c a l e n g i n e e r i n g28(2006124–130125Table1–COD and BOD5of the study lake sampled at three points for5days inMay2003COD(mg/LBOD5(mg/LBOD5/COD13May89.5135.700.4083.3334.500.4189.5136.600.4114May55.5624.800.4589.5135.200.3949.3820.900.4227May105.1141.300.3981.0832.300.40111.1141.000.3728May60.0026.830.4563.3327.700.4463.3327.000.4329May90.0035.700.4093.3337.000.40117.9949.400.42al.,2000;Coveney et al.,2002;Belmont et al.,2004.However, this method requires a large land area in addition to the lake in question.For in situ treatment of hypereutrophic water bodies where the transparency of the water does not allow regrowth of submerged macrophytes,phosphorus precipitation in eutrophic lakes by iron application(Deppe and Benndorf, 2002or by additions of lime(Walpersdorf et al.,2004has been reported.Aeration of river water has been employed to remediate polluted rivers since the1970s(Wang et al.,1999. Increasing oxygen transfer inflow by stones placed in rivers was studied by Cokgor and Kucukali(2004.Growingfloating aquatic macrophytes(Sooknah and Wilkie,2004or terrestrial green plants usingfloating supports(Li and Wu,1997,physical ecological engineering(PEEN(Pu et al.,1998,and biotic addi-tives have also been applied(Chen,2003.However,these sim-ple designs do not constitute a real water treatment system and the efficiencies of these treatments are unsatisfactory.Activated sludge systems have been proved efficient treat-ing municipal sewage since the1960s(Ray,1995.However, this type of system has not been used for in situ remediation of polluted lakes or rivers.In the present study,the oxidation ditch technique was adopted on a lake receiving municipal sewage sludge.Floating green plants and the biofilms com-prisingfloating materials and plant roots were also added to enhance N and P removal.A pilot scale experiment was set up to test the feasibility and performance of the plant-enhanced oxidation ditch for in situ treatment ofboth the municipal sewage and the polluted lake water.2.Experimental2.1.Site descriptionThe study lake was situated at South China Agricultural Uni-versity,Guangzhou,China.The area of the lake was about 10000m2and the depth0.5–3m.This lake received the munic-ipal sewage from the residential area around the university.Fig.1–Surface arrangement of the plant-biofilm oxidation ditch and the waterflows.(1Wall of nylon tissue;(2nets of5mm;(3nets of0.25mm;(4oxidation ditch;(5jet-flow aerator;(6water pump;(7floating green plants;(8sewage entry.2.2.Establishment of the plant-biofilm oxidationditchesT wo24m2(width2m,length12mparallel oxidation ditches made of plastic materials were installed along the lake bank near the sewage inlet.The inner ditch was made of cement and the outer ditch was isolated with nylon tissues andfix-ing PVC(polyvinyl chloridetubes.Fig.1showsthe surface arrangement and the waterflow path.The coarse suspended solids in the influent werefiltered by two pl astic nets,one with a pore size of5mm and the other with a pore size of0.25mm,whereas the suspended solids in the effluent werefiltered by a plastic net with a pore size of 0.25mm.Zizania caduciflora and Canna generalis were grown in the ditch with theplast icfloating supporters which held the plants in position.Thefloating supporters were made of closed126e c o l o g i c a l e n g i n e e r i n g28(2006124–130PVC tubes and nylon nets and each was3.6m2.Zizania caduci-flora was grown on twofloating supporters an d Canna gener-alis on another two supporters.The plants were planted in four columns andfive lines.The twofloating supporters with Canna generalis were near the influent and the two with Zizania caduciflora were near the effluent.The entire disposal system is shown in Photo1.2.3.Conduct of the experimentsAn experiment was conductedfirstly on municipal sewage in autumn–winter seasons of2003–2004for about150days. The aeration of the oxidation ditch was achieved using a jet-flow aerator of0.75kW(Aqua Co.,Italy;air generation10m3/h, water jet rate22–28m3/h.The water sampling started on18 September2003and endedon12February2004.The influent was2m3/h created by a water pump of0.37kW.With the jet-flow aerator of0.75kW the theoretical air/water ratio was5, HRT was18h and the return ratio was10–13.The system was then run with the polluted lake water in summer and autumn2004for about160days with an aerator of1.25kW and with an influent of6m3/h(air/water3.3,HRT 6h.The influent was not created by water pump but by the driving fo rce of the jet-flow aerator.The water sampling for the second run started on15May2004and endedon15October 2004.2.4.Sampling and analysisThe influent and effluent were sampled every3–5days at 08:00–09:00a.m.andat17:00–18:00p.m.,each with three sam-pling re plicates for thefirst run.For the second run,the influ-ent and effluent were sampled1day a week.The water sam-pler took0–30cm surface water.The samples were analyzed for COD Cr,BOD5,SS,TP,NO3−-N,NH4+-N and pH according to standard methods(APHA,1995.The plant s were transplanted ontofloating supporters two weeks before water sampling and thefirst harvest was carried out60days later and at the termination of thefirst run for the municipal sewage.The plant biomass and N and P con-tents were measured according to the methods proposed by the Soil and Agro-Chemical Analysis Committee of China(Lu, 2000.The total uptakes of N and P were calculated and com-pared with the total removal of these elements calculated by the cumulative removal each day following measurement of a water sample.Total N removal=(average N in influent−average N in effluent×48×D iwhere48was the treated water volume per day in m3/day;D i was the number of days following the water sampling and before the next sampling.3.Results and discussionTable2shows the removal of COD Cr and SS by plant-biofilm oxidation ditch for the treatment of the municipal sewage in autumn–winter seasons of2003–2004.The removal of COD Cr varied from60to79%with an average of70%for the influent COD Cr ranging from100to200mg/L,a nd resulted in effluent COD Cr valuesfrom30to55mg/L(Table2,Fig.2.The average removal percentage was about75%for SS and variedfrom68to82%(Table2.The effluent SS was about 30mg/L which is the effluent limit value of the second grade for the sewage treatment plants in China(GB18918,2002 (Fig.3,for the influents varying from60to240mg/L.The average NH4+-N removal from influent was52%,which was lower in winter than in autumn(Table3.This may be due to lower bacterial activity in winter,but theinfluent NH4+-NTable2–Removal of COD and SS by the plant-biofilm oxidation ditch for the in situ treatment of municipal sewage each month in autumn–winter seasons of2003–2004Period Sampled days Water temperature(◦CInfluent(mg/LEffluent(mg/LRemoval(%COD Cr18–30September528.0118.54(3.01a34.34(7.8367.74 3–28October826.1123.91(4.0333.51(4.2672.661–7November326.0153.94(2.7337.60(3.8175.4918–28November423.1170.22(4.2835.45(5.3778.711–15December419.3180.36(8.2039.24(7.0677.6511–31January314.5128.46(3.6652.04(5.2359.504–12February216.8178.35(4.1662.86(5.8362.47Average150.54(4.3042.15(5.6370.60SS18–30September528.0160.4041.6074.18 3–28October826.1144.3826.2581.171–7November326.0116.0033.3370.7918–28November423.1111.7521.5080.981–15December419.390.5028.5068.4211–31January314.5104.0017.3382.384–12February216.8120.5033.0072.57Average121.0828.7975.78e c o l o g i c a l e n g i n e e r i n g28(2006124–130127Fig.2–COD in the influent and effluent of the plant-biofilm oxidation ditch for the in situ treatment of municipal sewage in autumn–winter seasons of2003–2004.was also higher in winter(Fig.4probably because of lower water consumption in the cold season.The total inorganic-N removal was similar to that for NH4+-N(Table3.NO3−-N concentrations were rather similar in the influent and the effluent.The total P removal varied from63to78%and was higher and more regular than N removal(Table3.The P concentra-tion in treated effluent was about1mg/L(Fig.5and conformed to the Chinese municipal sewage treatment standard which is set to3mg/L for second grade regions and1.5forfirst grade regions(GB18918,2002.Fig.6shows typical changes in the water quality param-eters for the sampling points from inlet to outlet.Thisindi-Fig.3–Suspended solids concentration in the influent and effluent of the p lant-biofilm oxidation ditch for the in situ treatment of municipal sewage in autumn–winter seasons of2003–2004.cates that COD and SS decreased gradually,but NH4+-N and TP dropped substantially following the mixing with the return water by the aerator and then decreased slowly,while NO3−-N and pH of the water remained virtually unchanged.The water DO increased dramatically following the aeration,decreased slowly thereafter and remained rather high even in the efflu-ent(about5.5mg/L.For the second run treating the polluted lake water on-site,the average influent COD Cr was42.7mg/L and the effluent 25.1mg/L for about160days during summer–autumn seasons (Fig.7.The removal of NH4+-N was about50%from about13.1 to6.4mg/L.Total-P in the effluents was rather stable,bei ngTable3–The removal of N and P by the plant-biofilm oxidation ditch for the in situ treatment of municipal sewage for each month in autumn–winter seasons of2003–2004Period Sampled days Water temperature(◦CInfluent(mg/LEffluent(mg/LRemoval(%NH4+-N18–30September528.020.60(0.30a7.16(0.2264.72 3–28October826.126.55(0.2310.15(0.2061.671–7November326.030.00(0.4113.67(0.2254.5118–28November423.135.15(0.7915.95(0.2653.991–15December419.335.89(0.3515.93(0.2755.1511–31January314.530.57(0.6918.59(0.2236.634–12February216.835.23(0.0521.61(0.0637.72Average30.57(0.4014.72(0.2152.06NH4+-N+NO3−-N18–30September528.023.06(0.159.24(0.1159.94 3–28October826.128.31(0.1212.01(0.1457.571–7November326.031.42(0.2114.58(0.1153.5918–28November423.136.32(0.4016.81(0.1353.721–15December419.337.41(0.1917.54(0.1453.1111–31January314.531.96(0.3720.07(0.1337.204–12February216.837.11(0.0323.35(0.0337.08Average32.23(0.2116.23(0.1150.32TP18–30September528.0 3.56(0.070.81(0.0475.56 3–28October826.1 4.01(0.140.87(0.0478.241–7November326.0 4.37(0.13 1.20(0.0472.5618–28November423.1 4.89(0.16 1.13(0.0776.661–15December319.5 4.86(0.80 1.38(0.2371.07 11–31January314.5 3.75(0.45 1.35(0.0363.32 4–12February216.8 4.75(0.10 1.51(0.0566.20 Average 4.31(0.16 1.16(0.0471.89128e c o l o g i c a l e n g i n e e r i n g 28(2006 124–130Fig.4–NH 4+-N concentration in the influent and effluent of the plant-biofilm oxidation ditch for the in situ treatment of municipal sewage in autumn–winter seasons of2003–2004.Fig.5–Total-P concentration in the influent and effluent of the plant-biofilm oxidation ditch for the in situ treatment of municipal sewage in autumn–winter seasons of2003–2004.Fig.6–T ypical changes in the pollutants in theplant-biofilm oxidation ditch during the in situ treatment ofFig.7–The influent and effluent concentrations of COD (up,NH 4+-N (medianand total-P (bottomin theplant-biofilm oxidation ditch treating polluted lake water.about 0.38mg/L from an average of 1.09mg/L in the influents.The removal of COD Cr ,NH 4+-N and Total-P was then quite sat-isfactory both for the municipal sewage and the polluted lake water.The removal of N and P was somewhat higher than con-ventional oxidation ditches,perhaps due to the existence of the plant-biofilm in the studiedsystem.However,the direct uptake rates of N and P by green plants were almost negligi-ble compared to the total removal of these elements by the whole system (Table4.However,the plants may have cre-ated localized anaerobic conditions by their root exudates and dead biomass and enhance the denitrification of N by micro-organisms as occurs in constructed wetlands (Hone,2000.Besides the green plants,the proposed system also con-tains biofilm coated to the plastic materials.The high velocity of return-fluent was different to the conventional oxidation ditch.Kugaprasatham et al.(1982showed that the increase of the fluent velocity could increase the density of the biofilm if the nutrient conditions were suitable for bacteria growth.Simultaneous nitrification/denitrification (SND(Van Mun ch etal.,1996may also occur in the system.Concerning the P removal of the system,biological phos-phate removal processes may occur but were not significant because there was no sludge removal and very little sludge precipitation after the run for treatment of municipal sewage.This may partly due to the existence of some ferric chains which were added to precipitate and fix the nylon tissue to the lake bottom,with formation of precipitates of ferric phos-e c o l o g i c a l e n g i n e e r i n g 2 8 ( 2 0 0 6 124–130 129 Table 4 – Proportions of N and P uptake by plants and total removal in the plant-biofilm oxidation ditch treating municipal sewage Date Days ZCa Harvested fresh biomass (g CG ZC 5 September–4 November 5 November–6 January Total or average a Plant uptake (g N CG 5.30 13.03 System removal (kg N CG P Percent of plant uptake N (% P (% P ZC 0.88 0.24 2.79 60 63 123 2200 625 9725 2750 4150 4.85 1.20 24.38 0.72 0.95 37.63 65.45 103.1 7.13 12.78 19.91 0.03 0.02 0.02 0.02 0.01 0.01 ZC: Zizania caduciflo ra; CG: Canna generalis. tained for at least 1 year. The actual mechanisms still remain to be identified. The oxidation ditch has been used for many years worldwide as an economical and efficient wastewater treatment technology that can remove COD, nitrogen and a fraction of the phosphorusefficiently. Anaerobic tanks (Liu et al., 2002 and phased isolation ditch systems with intra-channel clarifier (Hong et al., 2003 were added to the system to increase the TP removal efficiency. The proposed process takes an artificial process in combination with natural purification, transforming the natural lake into the wastewater treatment plant, and could evidently reduce the costs of sewage collection, the landspace requirement and the construction costs compared with the conventional sewage treatment plants. This process could be especially suitable to subtropical regions and to many water bodies in south China and southeast Asia where sewage treatment facilities are not well established. China. The authors are grateful to Dr. P. Christie, Department of Agricultural and Environmental Science, Queen’s University Belfast, UK, and Dr. Y. Ouyang, Department of Water Resources, St. Johns River Water Management District, Palatka, FL, USA, for their valuable suggestions and language corrections. references 4. Conclusions The present study adapted the oxidation ditch on the lake surface for in situ treatment of municipal sewage or polluted lake water in combination with plant biofilms for performing N and P removal, and running experiments at pilot scale for about 1.5 years resulted in the following observations: (1 The system was quite satisfactory and stable for treatment of municipal sewage and polluted lake water in removing COD, NH4 + -N and P. (2 The direct uptake of N and P by plants was negligible in comparison with the totalremoval by the system, but indirect mechanisms via plant root exudates and biofilms merit further studies. (3 The proposed process could dramatically reduce the costs of sewage collection, the land-space requirement and the construction costs compared with conventional sewage treatment plants; might be suitable for treatment of both municipal sewage and polluted lake water; and could lead to the promotion of wastewater treatment in many developing countries. Acknowledgements This study was funded by Department of Science and Technology of Guangdong Province (Grant no. 2004B33301007, American Public Health Association (APHA, 1995. Standards Methods for the Examination of Water and Wastewater, 19th ed. American Public Health Association, Washington, DC. Belmont, M.A., Cantellano, E., Thompson, S., Williamson, M.,S’anchez, A., Metcalfe, C.D., 2004. Treatment of domestic wastewater in a pilot-scale natural treatment system in central Mexico. Ecol. Eng. 23, 299–311. Chen, Y.C., 2003. Bioremediation Engineering of Polluted Environment. Chemical Industry Press, Beijing, p. 304 (in Chinese. Cokgor, S., Kucukali, S., 2004. Oxygen transfer in flow around and over stones placed in a laboratory flume. Ecol. Eng. 23, 205–219. Correll, D.L., 2005. Principles of planning and establishment of buffer zones. Ecol. Eng. 24, 433–439. Coveney, M.F., Stites, D.L., Lowe, E.F., Battoe, L.E., Conrow, R., 2002. Nutrient removal from eutrophic lake water by wetland filtration. Ecol. Eng. 19, 141–159. Deppe, T., Benndorf, J., 2002. Phosphorus reduction in a shallow hypereutrophic reservoir by in-lake dosage of ferrous iron. Water Res. 36, 4525–4534. Hone, A.J., 2000. Phytoremediation by constructed wetlands. In: Terry, N., Banuelos, G. (Eds., Phytoremediation of Contaminated Soil and Water. Lewis Publishers, pp. 13–40. Hong, K.H., Chang, D., Hur, J.M., Han, S.B., 2003. Novel phased isolation ditch system for enhanced nutrient removal and its optimal operating strategy. J. Environ. Sci. Health Part A 38, 2179–2189. Kugaprasatham, S., Nagaoka, H., Ohgaki, S., 1982. Effect of turbulence on nitrifying biofilms at non-limiting substrate conditions. Water Res. 26, 1629–1638. Li, F.X., Xin, Y., Chen, W., 2000. Assessment of eutrophication level of lakes. Chongqing Environ. Sci. 22, 10–11 (in Chinese. Li, F.B., Wu, Q.T., 1997.Domestic wastewater treatment with means of soilless cultivated plants. Chin. J. Appl. Ecol. 8, 88–92 (in Chinese. Liu, J.X., Wang, B.Z., van Groenestijn, J.W., Doddema, H.J., 2002. Addition of anaerobic tanks to an oxidation ditch system to enhance removal of phosphorus from wastewater. J. Environ. Sci. 14, 245–249.130 e c o l o g i c a l e n g i n e e r i n g 2 8 ( 2 0 0 6 124–130 Lu, R.K., 2000. Soil and Agricultural Chemistry Analysis. China Agriculture Press, Beijing (in Chinese. Mitsch, W.J., Horne, A.J., Nairn, R.W., 2000. Nitrogen and phosphorus retention in wetlands—ecological approaches to solving excess nutrient problems. Ecol. Eng. 14, 1–7. Pu, P., Hu, W., Yan, J., Wang, G., Hu, C., 1998. A physico-ecological engineering experiment for water treatment in a hypertrophic lake in China. Ecol. Eng. 10, 179–190. Ray, B.T., 1995. Environmental Engineering. PWS Publishing Company, New York, pp. 299–341. Sooknah, R.D., Wilkie, A.C., 2004. Nutrient removal by floating aquatic macrophytes cultured in anaerobically digested flushed dairy manure wastewater. Ecol. Eng. 22, 27–42. Van Munch, E.P., Land, P., Keller, J., 1996. Simultaneous nitrification and denitrification in bench-scale sequencing batch reactors. Water Sci. Technol. 20,277–284. Wang, C.X., Lin, H., Shi, K.H., 1999. Restoration of polluted river by pure oxygen aeration. Shanghai Environ. Sci. 18, 411–413 (in Chinese. Walpersdorf, E., Neumann, T., Stuben, D., 2004. Efficiency of natural calcite precipitation compared to lake marl application used for water quality improvement in an eutrophic lake. Appl. Geochem. 19, 1687–1698.。

外文资料与中文翻译外文资料：1 microcontroller features of the development oftechnologySCM has been there since, SCM technology has gone through nearly 20 years of development journey. Throughout the past 20 years of SCM Exhibition history we can see that the SCM technology to the development of the microprocessor (MPU) technology and ultra-large-scale integrated circuit technology for the Exhibition for the pilot to pull a wide range of applications, showing more personality than the microprocessor trend of development：SCM long life here said the long-life, on the one hand refers to the development of SCM products can be stable and reliable work 10, 20, on the other hand refers to the microprocessor compared to the long life. With the rapid development of semiconductor technology, MPU replacement faster, to 386,486,586 as the representative of the MPU, within a very short time to be out of Bureau, and the traditional microcontroller as 68 HC05, 8051, and so has been 15 years of age, the output is still rising. This is from Its application to the corresponding areas of adaptation, on the other hand is due to such CPU as the core, integrated with more I / O functions SCM module of the new series emerging. It is expected that the successful listing of the relatively young core CPU, also with the The I / O modules of the rich, have a long life cycle. New types of joining the CPU, the SCM team Has grown to the user brings more choice.8, 16, 32-bit microcontroller common development this is the current SCM technology development trends of the other. For a long time, single - Machinetechnology is the development of eight-oriented. As mobile communication, network technology, multimedia technology, and other high-tech productsAccess to family, 32-bit microcontroller applications have been developed by leaps and bounds. Motorola 68K for the CPU to the 32 of the 97 SCM August sales of 10 million. That because of the past eight SCM function is growing, more and cheaper 32-bit machine, 16 SCM living space is limited, and 16-bit microcontrollers from the development of both varieties and production, in recent years have substantially more。

酒店管理专业外文翻译--中国的餐饮业外文原文Development of China's catering industryChina food industry development prospects analysisThe catering industry in China as the tertiary industry is a traditional service industries, experienced reforming and opening starts, quantitative expansion, scale chain development and brand promotion strategy of 4phase, made make a spurt of progress in the development ofAt present, the country has4 millions catering outlets. 2005/2006annual Chinese top 100 catering enterprises with total assets of about thirty-two billion yuan, total profit of about six billion yuan, employees about eight hundred thousand people, respectively, over the same period last year increased40.38%,28.84% and33.33% higher than that of the whole society, the catering industry average growth levelChina's reform and opening up has gone through ups and downs in the30year, in the30 years of reforming and opening of China's catering industry along with the tide of reform has undergone three leap type development. In the past 30 years, China has experienced from fast food restaurants grabs beachChina market to SARS impact, then to food safety tonyred event, apple events , Chinese food and beverage industry in the impact, achieve sales growth.China population cardinal number is large, demand is exuberant, catering market development can not meet the needs of the market under the background of the implementation, and today, the food market is very prosperous, the basic balance of supply and demand, in the global economic crisis under the background of the catering industry to achieve new growth?About2008July to August, China Chain Management Association DDT Hua accounting firm common to Chinese chain catering industry development trend research, interviewed including Quanjude, Xibe, Qiao Jiangnan, Zhuang, Little Swan, small fat sheep, KFC, Yoshinoya, immortal trace forest industries such as the representative of the chairman or general manager. Inductive appear stage domestic chain catering industry development:first, chain catering industry development still maintain high speed. Survey of catering enterprises the development of chain operation mode to the outlets and stores the majority, accounted for 75%; the enterprise underinvestigation, a total of more than500chain stores, sales of more than 1more than 10 billion yuan only KFC stores, in 2007to reach 2400, sales of twenty-five billion one hundred million yuan, much more than the other catering enterprises. From the investigation analysis of chain stores, in100the following 66%, sales of one billion yuan 80% for the majority of the business scale.From sales growth ratio analysis,95% enterprises have two digit growth, which grew10%,20% interval accounted for 42%, growth of 20% -30% interval31%, two interval growth ratio is the enterprise under investigation shows that the majority of mainstream, enterprise development in line with benign operation rule, can still maintain a relatively high growth rate.second, raw material rises quickly, gross margin is firm in have litre. 32% of the surveyed companies of raw materials in 2007growth rate below 10%,52% enterprises of raw materials increase rate is amounted to10%,20%,16% of raw material of enterprise growth rate reached 20% -30%. The cost of raw materials rising under the premise of the enterprise under investigation, only 26% gross margin declined 5% in47% enterprises, gross margin is basically not changed, and 16% and 11% growth respectively the enterprises within 5% and5% above.Thus it can be seen, the majority of enterprises still keep firm in have litre gross margin, that surveyed enterprises chain operating profit pattern comparison of health, ability to resist risks, in the open source efficiency and mining space.Third, human resources, management cost, standardization is difficult to constitute the three major challenges. According to the survey, the current chain catering industry facing the development of the main problems include human resources, operating cost, standardization difficulty is great, malign competition, industry shortage of funds and policy support and other issues. Among them, human resources accounted for the highest proportion of choice, up to 80%, followed by the operating costs,60%, standardization difficulty big,45%, form chain catering industry development faces three challenges.In four, the company strategy adjustment based on Sustainable development. Aiming at the problems in the development of catering enterprises, the survey also relates to chain catering enterprises will have on the future development strategy to make the adjustment? Induction includes six aspects, adjust the straight camp shop and store ratio; upgrade the existing brand or create new brand; productinnovation, realize the difference operation; the establishment of raw material production base, integration supply chain; establish the central kitchen; enhance internal operation efficiency and single-store profit level.Optimistic five, judge current economic developing situation of chain catering industry development influence. Although the CPI index in the short term it is difficult to fall, to enterprises operating pressure will continue to increase, but the vast majority of the enterprise under investigation thinks, from the country macroscopical economic development situation, the food and beverage industry will still maintain a relatively high growth rate, the enterprise operating pressure will be gradually ease, more than 90% of respondents expressed a positive optimistic attitude. Investigation shows, Quanjude, KFC, Dicos and other small fat sheep, most chain enterprises still maintain established open plan.The survey, in China's sustained and rapid economic development, food and beverage market continues to be active in the background, chain catering enterprises are continuously according to the external environment and oneself condition adjustment of development strategy, to realize the optimal development pattern.China food industry development trend analysisCatering industry in our country is developing very quickly, the national food industry turnover for 18 consecutive years to achieve two digit growth, in recent years the catering industry growth rate higher than other industries out of more than ten percentage points, industry development prospects for many enterprises and good investment institutions, can say our country is welcoming a catering industry development the gold period, but the market is complex and changeable, will change with the social environment. The catering enterprises should according to their own conditions and environmental requirements, see the catering industry's development trend, select the appropriate marketing method, can be in the fierce competition in the market success. Therefore, the dining industry development trend of the future, opportunities and challenges to undertake brief analysis.China's economy in recent years of rapid development, GDP increased rapidly, is continuously driven home to consume demand growth factor. Historical data analysis indicates that, the catering industry retail sales growth in GDP and there is a strong positive correlation between, from the 5years development, catering industry growth amplitude is higher thanthe country's GDP growth rate, far higher than the social consumable total volume of retail sales growth rate, with the catering industry dimensions expands ceaselessly, to national economy presents increasingly significant role in driving.On 2004, the implementation of the catering industry retail sales of seven hundred and forty-eight billion six hundred million yuan, than going up year increase one hundred and thirty-three billion yuan, grow 21.6% compared to the same period, for 14 consecutive years to achieve the fast growth of two digit, than the same period of social consumable total volume of retail sales growth rate is 8.3 percentage points higher, accounting for13.9% of the total retail sales of social consumer goods, the total retail sales of social consumer goods growth contribution rate of 21%, pulling the social consumable total volume of retail sales growth of 2.79percentage points On 2005, Chinese catering industry retail sales of eight hundred and eighty-eight billion six hundred million yuan, a year-on-year increase of 17.7%, than going up year add one hundred and thirty-three billion six hundred million yuan, higher than the total retail sales of consumer goods increased 4.8 percentage points, accounted for the total retail sales of social consumer goods proportion to achieve 13.2%, the totalretail sales of social consumer goods growth contribution rate and pulling rate is respectively 17.4% and2.3%. Achieve annual business tax forty-eight billion eight hundred million yuan, grow 17.8% compared to the same period.On 2006, Chinese food and beverage consumption annual retail sales exceeded trillion yuan to close greatly, achieve one trillion and thirty-four billion five hundred million yuan, a year-on-year increase of 16.4%, than going up year add one hundred and forty-five billion eight hundred million yuan.In 2007 the national catering business retail sales totaled one trillion and two hundred and thirty-five billion two hundred million yuan, a year-on-year increase of 19.4%, accounting for13.9% of the total retail sales of consumer goods, total retail sales of consumer goods led to an increase of 2.6 percentage points, social consumable total volume of retail sales growth contribution rate of 15.7%.2008 National Food Company retail amounts to one trillion and five hundred and five billion four hundred million yuan, grow 24.7% than 2007, for 18 consecutive years to maintain the speed of two digit. With China's per capita gross domestic product GDP of more than $2000, residents' consumption ability, consumption level, the Chinese high-end consumptionproportion will increase continuously. In overseas, Chinese continue to attack cities and capture territories, in the first08 years of Chinese Olympic recipes, further moves towards the internationalization, the catering industry has been become pull move consumption, growth, expanding employment is one of the important factors.Consumer analysisWith China's per capita GDP rises quickly, per capita gross domestic product GDP of more than $2000, residents' consumption ability, consumption level and improve the level of Chinese dinner, high-end consumption proportion will increase continuously. But the food demand is complicated and changeable, the consumer tastes and consumption psychology, will change with the social environment. The catering enterprises should according to their own conditions and environmental requirements, see the catering market trend of development, choose appropriate marketing method, can be in the fierce competition in the market success.Chinese taste has apparent district sex, Chinese cuisine cooking in many schools. One of the most influential and representative for the society recognized: Lu, Guangdong,Fujian, Sichuan, Su, Zhe, Xiang, Hui cuisine, namely" eight big cuisines". The cuisine of the formation and its long history and unique cooking characteristics inseparable. But also by the region's natural geography, climate conditions, resource specialty, diet habit has different effect, it is precisely because of these differences, the major cuisine products with a strong regional, occupy the major share of the local. Regional differences, and cause consumers strongly different psychology, willing to try a different flavor. Therefore, cross-boundary operation is the next hot, it can make the unique flavor diet between each other, learn from each other. At present, eight big cuisines appear cross-boundary operation, integration trend.Catering enterprises in different expansion, but with the standard of income or other standard, differentiate the whole nation for several economic zones, in each economy area at the center of the city set up flagship store; to stand firm, again with the flagship store for the base, to the surrounding medium and small city expansion strategy.First, market positioning, namely the regional consumer groups will be your target customers; followed by the taste, whether they agree with your dish flavors; third is the value of the brand, whetherthey will be your loyal supporter.They had two common characteristics: first, products single; secondly, regional characteristics, after leaving Beijing is very difficult to find the right people taste identification.Since 2008, China has 46city GDP of average per capita is in above of 3000 dollar, the city 's per capita consumption level is relatively high, become meals industry regional development growth points.Chinese have a herd mentality and skeptical Mentality -- conformity, more and more local people have more sense of security; doubt, is to believe your own surface judgment, listen to others explanation.In order to fired the first shot, food and beverage brands in different places to open flagship store, large area, the seats, investment is high, the daily operation of the pressure is also big store. But all the catering enterprises have an import period. In the introduction period, both to business confidence, but also to give customers confidence. Once the introduction period to do good, attendance does not follow to go up, Chinese herd mentality came up: fewer people he does not go; more to people without a little less; he even doubt: This is it right? Straight camp shop? Taste and old whether same? Is it right? What's the problem? Cantonesecuisine since in the early 80 century in the popular date,20 years for all eternity, the main reason is the Pearl River Delta regional economic rapid development, pull the catering industry prosperity and revitalization; at the same time Cantonese broad odd miscellaneous materials. To adapt to the different needs of customers innovation, continuous innovation;, promote the sustainable development of Cantonese cuisine. With the development of economy of our country, the Cantonese cuisine in the beginning of 80's in last century to the end of 90's in the form of climate, gradually embarked on a major cuisine overlord position, become the metropolitan dishes faucet, leading the consumer trend, share growth. Food consumption behavior analysis.In recent years, the income level of Chinese dweller increases, the rhythm of life speeds up, renew the concept of consumption, promoting the rapid development of Chinese catering industry catering consumers has three major development trends. First is business consumption increase. Promoting the economic development of increased business activities, business entertainment activities promote the high-grade food development. Second is the replacement of consumption increase. With the development of economy,increase of resident income, more and more people choose to go to the hotel consumption instead of their own cooking, which is manifested in recent year 's hot. The third are forced to consumption increase. More and more white-collar workers and migrant workers migrant workers, time is close, and not their cooked, they are helpless, unable to be forced to at a restaurant, it promotes the fast food industry development.Dining choice not only pay attention to taste, the restaurant environment, atmosphere, sentiment has become a customer's selection of dining venue necessary conditions, consumers pay attention to enjoy, focus on food and beverage products and cultural integration, the Chinese food culture and cuisine culture broad and profound, long history, different regions show catering cultural differences also make food products with distinctive cultural characteristics. Consumers seeking" color, flavor and taste, shape, texture, temperature, sound, nutrition, health," at the same time, advocate culture and food, diet, eating habits of fusion. In recent years emerging needs of theme restaurants is developing rapidly, this concept into full play, whether it is the design of the restaurant decoration, functional layout, decor, and even its operating characteristics of cuisine, reflect a certaincultural theme and intension, catering to the product culture has the greatest degree of show. Seize the culture that a selling point, will enable the food products with infinite vitality.From the industry statistics, Chinese food industry market size is very large, and expanded very quickly, but China's catering company current situation, one is enterprise dimensions small, amount is much, modern level is low; industry standard system is not perfect; according to statistics, China's existing catering outlets 4000000, employees nearly 20000000 people,7000000 cook people, average every 185 people have1chef. The food market is relatively the most dispersed in a market, home does not have a large food group can occupy 1% of the market share. Can be said to the catering industry is perfectly competitive industry, industry concentration is very low, the future trend of development is the industry is spent centrally rise considerably, to be at a scale of enterprise integration. From the dining enterprise's competition and development pattern, the future of China's catering business competition will be more intense, and accompanied by more enterprises listed. However, in the restaurant industry high speed development at the same time, food raw material costs,labor costs increase, lack of management talent, the cost is difficult to control and other aspects of a problem to be highlighted increasingly, industry competition intensified, the catering industry entered the" era of meager profit", the traditional management mode, operation encounters serious challenges. Chinese catering industry has entered the industry reshuffle period, must exchange of new ideas, explore new patter。

理工学院毕业设计外文资料翻译学院：理工学院专业：电子信息工程姓名：边治朋学号： 08L0701201外文出处：附件： 1.外文资料翻译译文；2.外文原文。

指导教师评语：签名：年月日附件1：外文资料翻译译文LM358使用手册1．电源范围3～30V2．低电源电流消耗与电源电压无关。

典型值为 0.7 mA 。

3. 共模输入电压范围宽度，包括接地。

低输入偏置与偏移参数：1．输入失调电压的典型值为3mV 。

2．输入失调电流的典型值为2nA 。

3．输入偏置电流的典型值为20nA 。

4．差分输入电压范围等于最大额定电压为±32V 。

5．开环差分电压放大的典型值为100 V/mV 。

内部频率补偿这个芯片包括两个独立的，高增益，频率补偿运算放大器。

适合于电源电压范围很宽的单电源使用，也是用于双电源工作模式。

两个电源之间的差值为3 V 至30 V ，和VCC 至少必须比共模输入电压高1.5 V。

ＬＭ３５８引脚图应用包括传感器放大器，直流放大器，和所有传统的运算放大器电路，现在可以更容易地在单电源电压系统实施。

例如，在数字系统中使用的标准5 V电源供电情况下可以直接操作这个芯片，电子接口无需额外的±5 V电源。

LM358的温度范围-25℃至125℃。

绝对最大额定值以上经营自由空气的温度范围内（除非另有说明）。

LM358 单位电源电压，VCC 32 V差分输入电压，VID±32 V输入电压VI–0.3 to 32 V接地输出短路持续时间（放大器）在（或低于）25°C自由空气的温度（Vcc≤15伏）（见注3）无限连续总功耗见耗散评价表经营自由的空气温度范围TA 0 to 70 °C存储温度范围，Tstg –65 to 150 °C外壳温度为60秒260 °C铅为60秒温度1,6毫米（1/16英寸）300 °C10秒的铅温度1,6毫米（1/16英寸）260 °C耗散评等表包装额定功率Ta≤25 °C降额因子TA= 25°CTA=70℃额定功率TA= 85°C额定功率TA= 125°C额定功率D 725 mW 5.8 mW/ °C 464 mW 377 mW 145 mWFK 1375 mW 11.0 mW/ °C 880 mW 715 mW 275 mW JG 1050 mW 8.4 mW/°C 672 mW 546 mW 210 mW P 1000 mW 8.0 mW/°C 640 mW 520 mW 200 mW PW 525 mW 4.2 mW/ °C 336 mW 273 mW在指定的自由空气温度的电气特性参数测试条件测试温度LM358单位最小典型值最大输入失调电压VCC= 5 V至最25℃ 3 7 mV大，全范围9平均温度系数输入失调电压全范围7 µV/ ℃输入失调电流VO=14V25℃ 2 50nA 全范围150平均气温系数输入失调电流全范围10 pA/°C输入偏置电流VO=14V25℃–20 –250nA 全范围-500共模输入电压范围VCC= 5 V至最大，25℃0至VCC-1.5V全范围0至VCC-2高电平输出电压RL≥ 2 k Ω25°C VCC–1.5V RL≥ 10 kΩ25°CVCC=最大RL=2kΩ全范围26RL≥10kΩ全范围27 28低电平输出电压RL ≤ 10 kΩ全范围 5 20 mV大信号差电压差放大VCC= 15 V,VO=1V至11V，RL= ≥ 2 kΩ25℃25 100V/mV全范围15共模抑制比VCC = 5 V 至最大,VIC=VICR(min)25°C 65 80 dB电源电压抑制比VCC = 5V到最大25°C 65 100 dB串音衰减f = 1 kHz to 20kHz25°C 120 dB输出电流VCC=15，VID=1 V,VO= 025°C –20 –30mA全范围–10VCC=15 V，VID=1 V，V o =15 V，25°C 10 20全范围 5VID = –1V,VO= 200 mV25°C 12 30 µA短路输出电流VCC=5 V，GND=-5V，VO= 025°C ±40 ±60 mA供电电流（两个放大器）VO= 2.5 V，无负载全范围0.7 1.2mA VCC= 最大,VO= 0.5 V,无负载全范围 1 2所有的特点是测量零共模输入电压开环的条件下，除非另有规定。

门禁管理系统原理外文翻译(含原文)以及何时他们被允许进入或退出。

这是一个重要的安全措施，可以应用于各种场合，包括银行、夜总会、商店和其他需要保护的地方。

传统的机械锁和钥匙已经无法满足对安全性和便利性的要求，因此电子门禁系统成为了一种更为普遍的选择。

电子门禁系统使用计算机技术来管理访问权限，可以授权不同的人员在不同的时间进入或离开特定的区域。

凭证是授权的基础，可以是卡片、密码或其他形式的身份验证。

当授权人员在预定时间内使用凭证进入特定区域时，门会自动解锁，并记录访问信息。

如果访问被拒绝，门将保持锁定状态，并记录拒绝信息。

如果门被强行打开或保持打开时间过长，系统将发出警报。

访问控制系统还可以与其他设备集成，如摄像头、闸机和报警系统，以提高安全性。

通过使用电子门禁系统，可以更有效地管理和监控物理访问控制，保护重要的信息和资产。

Access control has historically been achieved through the useof keys and locks。

allowing individuals to enter or exit as permitted。

Mechanical locks and keys allow access to a specific area at a designated time or date。

However。

these do not provideany specific record of key usage and can easily be copied or transferred to unauthorized persons。

In the event of a lost key or revoked access。

the lock must be rekeyed。

Electronic access control solves the ns of mechanical locks and keys by using computers to grant access at predetermined times。

空调制冷铜管的蚁巢腐蚀Formicary corrosion of ACR copper tube 马宗理张金利范震宋艳琴李性森Ma Zongli Zhang jinli Fan Zhen Song Yanqin Li Xingsen金龙精密铜管集团股份有限公司Golden Dragon Precise Copper Tube Group Inc.目录1、前言 (1)2、空调制冷铜管蚁巢腐蚀的宏观和微观特征 (2)2.1 宏观特征 (2)2.2 微观特征 (2)3、引发蚁巢腐蚀的腐蚀性物质的调查和分析研究 (3)⑴含氯有机溶剂 (3)⑵在弯管、胀管和铝翅片冲压中用作润滑剂的挥发性润滑油 (5)⑶助焊剂 (7)⑷压缩机油 (7)⑸木材和人造建材 (7)⑹泡沫塑料隔热层和胶粘带 (9)⑺香水、化妆品、调味品药品和杀虫剂 (9)4、蚁巢腐蚀研究的内容..................................................... .10 4.1 试验方法的研究..................................................... (10)4.2 蚁巢腐蚀机理和影响因素的研究 (11)4.3 关于预防措施的研究 (14)5、我公司的对策 (15)摘要：空调制冷铜管的一种特殊腐蚀—蚁巢腐蚀，易造成空调制冷装置的提前失效。

本文综述了空调制冷铜管蚁巢腐蚀的特征、引发腐蚀的物质、影响因素、试验方法、机理和预防措施。

关键词：空调制冷；铜管；腐蚀；蚁巢腐蚀Abstract：A special type of corrosion for air conditioners，refrigerators and so on，named “ant nest corrosion ”or “formicary corrosion”, leaded to premature failure. The characters of ant nest corrosion，corrosion medium，the influencing factors，the method of experiments，corrosion mechanism and preventive measures are reviewed.Keywords：Air conditioning and refrigerating；Copper tubes；Corrosion；Ant nest corrosion or formicary corrosion1、前言机电产品破坏的原因很多，按其本质分类也较多，但最常见的是三种：⑴机械作用力造成的裂纹与断裂；⑵表面摩擦造成的磨损；⑶化学作用造成的腐蚀。

湿度传感器系统中英文资料外文翻译文献英文:The right design for a relative humidity sensor systemOptimizing the response characteristics and accuracy of a humidity sensor system1 OverviewTo make the right choice when selecting a relative humidity sensor for an application, it is important to know and to be able to judge the deciding factors. In addition to long-term stability, which is a measure on how much a sensor changes its properties over time, these factors also include the measurement accuracy and the response characteristics of the sensor. Capacitive humidity sensors are based on the principle that a humidity-sensitive polymer absorbs or releases moisture as a function of the relative ambient humidity. Because this method is only a spot measurement at the sensor location, and usually the humidity of the surroundings is the desired quantity, the sensor must be brought into moisture equilibrium with the surroundings to obtain a precise measurement value. This process is realized by various transport phenomena (cf. the section titled "The housing effect on the response time"), which exhibit a time constant. Accuracy and response time are thus closely dependent on each other, and the design of a humidity measurement system becomes a challenge.2Measurement accuracyThe term measurement accuracy of a humidity sensor is understood primarily to refer to the deviation of the value measured by the sensor from the actual humidity. To determine the measurement accuracy, references, such as chilled mirror hygrometers, whose own tolerance must be taken into account, are used. In addition to this trivial component, humidity sensors require a given time for reaching stable humidity and temperature equilibrium (the humidity is a function of temperature and decreases with increasing temperature; a difference betweensensor and ambient temperature leads to measurement errors). This response time thus has a significant effect on the value measured by the sensor and thus on the determined accuracy.This time-dependent characteristic is explained in more detail in the following.3Response characteristics and response timeThe response characteristics are defined by various parameters. These are:●The actual response characteristics of the humidity sensor at constant temperature.(1) How quickly the sensitive polymer absorbs or releases moisture until equilibrium is reached (intrinsic response time)(2) How fast the entire system reaches humidity equilibrium (housing effect)●The thermal response characteristics of the humidity sensor at a non-constant temperature●(3) The thermal mass of the sensor(4) The system's thermal mass, which is thermally coupled to the sensor (e.g. printed circuit board)(5) Heat sources in the direct surroundings of the sensor (electronic components)(1) and (3) are determined entirely by the sensor itself, (1) primarily by the characteristics of the sensitive polymer.(2) and (4) are primarily determined by the construction of the entire system (shape and size of housing andreadout circuitry).(5) is determined by heat-emitting electronic components.These points will be discussed in more detail in the following.The intrinsic response time (1)Qualitatively, the response characteristics of capacitive humidity sensors look like the following (Fig. 1).Fig. 1: Typical and idealized response characteristics of capacitive humidity sensors (schematic)Because these response characteristics are especially pronounced at high humidity values, an isothermal humidity jump from 40% to 100% was selected here for illustration. The desired ideal behavior of the sensor is indicated in blue. In practice, however, the sensor behaves according to the red line, approximately according to:RH-t=(E-S)*(1-e)+S（t）Here, the time span 1 is usually very short (typ. 1 – 30 min.), in contrast, the time span 2 is very long (typ. Many hours to days). Here the connection of measurement accuracy and response characteristics becomes clear (t until RH=100% is reached). The value at t4 (Fig. 1) is considered to be an exact measured value. However, this assumes that both the humidity and also the temperature remain stable during this entire time, and that the testing waits until this very long measurement time is completed. These conditions are both very hard to achieve and unusual in practice. For the calibration, there are the following two approaches, which both find use in practice (cf. Fig. 2):1.The measured value at t2 (Fig. 1) is used as a calibration reference.Advantage:The required measurement time for reaching the end value (in the example 100%) is clearly shortened,corresponds to practice, and achieves an apparent short responsetime of the sensor (cf. Fig. 2).Disadvantage:●If the conditions are similar for a long time (e.g., wet periods in outdoor operation),the sensors exceed the correct end value (in the example 100%) undesirably by upto 10% (cf. Fig. 2).2. The measured value at t4 (Fig. 1) is used as a calibration reference.Advantage:●Even for similar conditions over a long time (e.g., wet periods in outdoor operation),an exact measurement result is obtained (cf. Fig. 2).Disadvantage:●For a humidity jump like in Fig. 1, the sensors very quickly deliver the measuredvalue at t2, but reaching a stable end value (about 3-6% higher) takes a long time(apparent longer response time)(cf. Fig. 2).In order to take into account both approaches optimally, the measured values at t3 (cf. Fig. 1) are used as the calibration reference by Sensirion AG.Fig. 2: Response characteristics of different humidity measurement systemsThe housing effect on the response time (2)Here, two types of transport phenomena play a deciding role:●Convection: For this very fast process, the air, whose humidity is to be determined,is transported to the sensor by means of ventilation.●Diffusion: This very slow process is determined by the thermal, molecularself-motion of the water molecules. It occurs even in "stationary" air (e.g., within ahousing), but leads to a long response time.In order to achieve favorable response characteristics in the humidity measurement system, the very fast convection process must be supported by large housing openings and the slow diffusion process must be supported by a small housing around the sensor (small "dead volume") with "stationary" air reduced to a minimum. The following applies:Thermal effects (3), (4), and (5)Because the total thermal mass of the humidity measurement system (sensor + housing) has a significant effect on its response time, the total thermal mass must be kept as low as possible. The greater the total thermal mass, the more inert the measurement system becomes thermally and its response time, which is temperature-dependent, increases. In order to prevent measurement errors, the sensor should not be mounted in the vicinity of heatgenerating components.4Summary –what should be taken into account when designing a humidity measurement systemIn order to achieve error-free operation of a humidity-measurement system with response times as short as possible, the following points should be taken into account especially for the selection of the sensor and for the design of the system.●The selection of the humidity sensor element. It should●be as small as possible,●have a thermal mass that is as low as possible,●work with a polymer, which exhibits minimal fluctuations in measured values duringthe time span 2(cf. Fig. 1); testing gives simple information on this condition,●provide calibration, which corresponds to the requirements (see above), e. g.,SHT11/SHT15 from Sensirion.●The housing design (cf. Formula 1). It should●have air openings that are as large as possible in the vicinity of the sensor or thesensor should be operated outside of the housing à good convection!●enclose a "dead volume" that is as small as possible around the sensor àlittlediffusion!●The sensor should be decoupled thermally as much as possible from other components,so that the response characteristics of the sensor are not negatively affected by the thermal inertia of the entire system.(e.g., its own printed circuit board for the humidity sensor, structurally partitioning the housing to create a small volume for the humidity sensor, see Fig. 3)Fig. 3: Mounting example for Sensirion sensors SHT11 and SHT15 with slits for thermal decoupling●The sensor should not be mounted in the vicinity of heat sources. If it was, measuredtemperature would increase and measured humidity decrease.5Design proposalThe challenge is to realize a system that operates cleanly by optimally taking into account all of the points in section 4. The already calibrated SMD humidity sensors SHT11 and SHT15 from Sensirion are the ideal solution. For optimum integration of the sensors in a measurement system, Sensirion AG has also developed a filter cap as an adapter aid, which takes into account as much as possible the points in section 4 and also protects the sensor against contaminants with a filter membrane. Fig. 4 shows schematically how the sensors can be ideally integrated into a housing wall by means of the filter cap SF1.Fig. 4: Filter cap for SHT11 and SHT15In addition to the advantages mentioned above, there is also the option of building an IP67-compatible humidity measurement device (with O-ring, cf. Fig. 4) with optimalperformance. Detailed information is available on the Sensirion Web site.译文：相对湿度传感器系统的正确设计湿度传感器系统精度及响应特性的优化1.综述为了在相对湿度的应用方面对传感器做出正确的选择，了解和评估那些起决定作用的因素是非常重要的。

20外⽂⽂献翻译原⽂及译⽂参考样式华北电⼒⼤学科技学院毕业设计（论⽂）附件外⽂⽂献翻译学号： 0819******** 姓名：宗鹏程所在系别：机械⼯程及⾃动化专业班级：机械08K1指导教师：张超原⽂标题：Development of a High-PerformanceMagnetic Gear年⽉⽇⾼性能磁齿轮的发展1摘要：本⽂提出了⼀个⾼性能永磁齿轮的计算和测量结果。

上述分析的永磁齿轮有5.5的传动⽐，并能够提供27 Nm的⼒矩。

分析表明，由于它的弹簧扭转常数很⼩，因此需要特别重视安装了这种⾼性能永磁齿轮的系统。

上述分析的齿轮也已经被应⽤在实际中，以验证、预测其效率。

经测量，由于较⼤端齿轮传动引起的磁⼒齿轮的扭矩只有16 Nm。

⼀项关于磁齿轮效率损失的系统研究也展⽰了为什么实际⼯作效率只有81％。

⼀⼤部分磁损耗起源于轴承，因为机械故障的存在，此轴承的备⽤轴承在此时是必要的。

如果没有源于轴的少量磁泄漏，我们估计能得到⾼达96％的效率。

与传统的机械齿轮的⽐较表明，磁性齿轮具有更好的效率和单位体积较⼤扭矩。

最后，可以得出结论，本⽂的研究结果可能有助于促进传统机械齿轮向磁性齿轮发展。

关键词：有限元分析（FEA）、变速箱，⾼转矩密度，磁性齿轮。

⼀、导⾔由于永久磁铁能产⽣磁通和磁⼒，虽然⼏个世纪过去了，许多⼈仍然着迷于永久磁铁。

，在过去20年的复兴阶段，正是这些优点已经使得永久磁铁在很多实际中⼴泛的应⽤，包括在起重机，扬声器，接头领域，尤其是在永久磁铁电机⽅⾯。

其中对永磁铁的复兴最常见于效率和转矩密度由于永磁铁的应⽤显著提⾼的⼩型机器的领域。

在永久磁铁没有获取⾼度重视的⼀个领域是传动装置的领域，也就是说，磁⼒联轴器不被⼴泛⽤于传动装置。

磁性联轴器基本上可以被视为以传动⽐为1：1磁⼒齿轮。

相⽐标准电⽓机器有约10kN m/m的扭矩，装有⾼能量永久磁铁的磁耦有⾮常⾼的单位体积密度的扭矩，变化范围⼤约300–400 kN 。