昆明理工大学自动化专业英语翻译.ppt

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1、机电或自动化专业英语《自动化专业英语》基本目标：基本能够比较顺利、准确地阅读机电专业方面的英文书刊、文献、技术资料，在这方面具备一定的翻译和沟通、表达、交流能力。SpecializedEnglishforElectromechanization(Electro-Mechanism)Howtospeak“专业英语”inEnglish？Andhowabout“机电专业英语”?ContentElectronicTechnologyBipolarJunctionTransistorsUJTThyristorsandSCRsOperationalAmplifi

2、ersFlip-FlopsDigitalSystemDecodingFiltercircuitContentElectronicTechnologyDirect-currentRegulationPhaseControlUnijuncityTransistorPulseTriggeringControlTheoryIntroductiontoControlSystemContentControlTheoryPerformanceSpecificationsofControlSystemSecond-OrderSystemsDigitalControlSy

3、stemStateEquationContentComputerTechnologyTheApplicationofComputerElectricDriveDCMotorsBipolarJunctionTransistorWordsandTermsTransistor[træn´zistə]:[电子]晶体管Bipolar[bai´pəulə]:有两极的,双极的Polarity[pəu´læriti]:极性Negative[´negətiv]:负的,阴性的semiconductor[´semikən´dΛktə]:半导体crystal[´kristl]:

4、结晶，晶体，晶粒BipolarJunctionTransistorWordsandTermssymbol[´simbəl]:符号,记号,象征emitter[i´mitə]:发射极collector[kə´lectə]:集电极formula[´fƆ:mjulə]:公式,规则,客套语reverse[ri´və:s]:相反的,倒转的,颠倒的biased[`baiəst]:结果偏倚的,[数]有偏的BipolarJunctionTransistorTextToday,industrialelectronicsystemsemployseveraldevicesth

5、ataredescribedbythetermtransistor.目前，工业电子系统使用了多种由术语晶体管描述的器件。BipolarJunctionTransistorTextEachtypeoftransistorhasdifferentcharacteristicsandoperationalconditionsthatareusedtodistinguishitfromothers.每种晶体管都有区别于其它种类的特征和工作环境。BipolarJunctionTransistorTextInthefirstpartofthisdiscussion,

6、weareconcernedwiththebipolarjunctiontransistor.Structurally,thistransistorisdescribedasbipolarbecauseithastwodifferentcurrent-carrierpolarities.首先探讨双极型晶体管。从结构上看，这种晶体管被称为双极是因为它具有两种不同的电流载流子电极。BipolarJunctionTransistorTextHolesarepositivecurrentcarriers,whereaselectronsarenegativecu

7、rrentcarriers.空穴是正的载流子，电子是负的电流载流子。BipolarJunctionTransistorTextTwodistinctkindsofsemiconductorcrystalsareconnectedtogetherbyacommonelement.两种截然不同的半导体晶体通过公共元件连接在一起。BipolarJunctionTransistorTextThestructureofthisdeviceissimilartothatoftwodiodesconnectedbacktoback,withonecrystalbein

8、gcommontobothjunctions.Thecentermaterial