大学生考研英语演讲稿.doc

大学生考研英语演讲稿 Virtualinstrumentationisaninterdisciplinaryfieldthatmergessensing,hardware,andsoftwaretechnologiesinordertocreateflexibleandsophisticatedinstrumentsforcontrolandmonitoringapplications.Theconceptofvirtualinstrumentationwasborninlate1970s,whenmicroprocessortechnologyenabledamachinesfunctiontobemoreeasilychangedbychangingitssoftware. 虚拟仪器是一个跨学科的领域,融合传感、硬件和软件技术,以创建灵活和复杂的控制和监测仪器的应用。虚拟仪器的概念诞生于1970年代后期,当微处理器技术使机器的功能更容易改变通过改变它的软件。 Avirtualinstrumentationsystemisasoftwarethatisusedbytheusertodevelopaputerizedtestandmeasurementsystem,forcontrollinganexternalmeasurementhardwaredevicefromadesktopputer,andfordisplayingtestormeasurementdataonpanelsintheputerscreen.Thetestandmeasurementdataarecollectedbytheexternaldeviceinterf-acedwiththedesktopputer.VirtualinstrumentationalsoextendstoputerizedsystemsforcontrollingprocessesbasedonthedatacollectedandprocessedbyaPCbasedinstrumentationsystem. 虚拟仪器系统是一个软件,用户使用开发计算机测试和测量系统,控制外部测量从台式电脑硬件设备,和用于显示测试或测量数据面板在电脑屏幕上。测试和测量数据收集的外部设备界面的桌面计算机。虚拟仪器也延伸到计算机系统控制流程基于数据收集和处理的基于PC的仪器系统。 Aninstrumentisadevicedesignedtocollectdatafromanenvironment,orfromaunitundertest,andtodisplayinformationtoauserbasedonthecollecteddata.Suchaninstrumentmayemployatransducertosensechangesinaphysicalparameter,suchastemperatureorpressure,andtoconvertthesensedinformationintoelectricalsignals,suchasvoltageorfrequency.Theterminstrumentmayalsobedefinedasaphysicalsoftwaredevicethatperformsananalysisondataacquiredfromanotherinstrumentandthenoutputstheprocesseddatatodisplayorrecordingdevices.Thissecondcategoryofrecordinginstrumentsmayincludeoscilloscopes,spectrumanalyzers.Thetypesofsourcedatacollectedandanalyzedbyinstrumentsmayvarywidely,includingbothphysicalparameterssuchastemperature,pressure,distance,frequencyandamplitudesoflightandsound,andalsoelectricalparametersincludingvoltage,current,andfrequency. 乐器是一个设备,旨在收集数据从一个环境中,或从一个单元测试下,向用户显示信息基于所收集的数据。这种仪器可以使用传感器感知物理参数的变化,如温度或压力,将感知到的信息转换成电信号,如电压或频率杂文集穿上。术语工具也可以被定义为一个物理软件设备,执行一个分析数据从另一个仪器,然后输出处理获得的数据显示或记录设备。这第二个类别的记录工具可能包括示波器、频谱分析仪和数字毫米。类型的源数据收集和分析的仪器可能相差很大,包括物理参数,如温度、压力、距离、光线和声音的频率和振幅,以及电气参数包括电压、电流、频率。 大学生考研英语演讲稿篇2 ChoiceandProcess Goodmorning,ladiesandgentlemen: Mytopicisaboutchoiceandprocesstoday.Aresearchshowsthatamanhastomake73choicesoneday.Withsomanychoicesoneday, peopleeasilygetsoconfusedandafraidofma-ki-ngwrongchoicethattheyhesitateandfinallymissthetruepartoflife.Inmyopinion,thefollowingpartisofmuchmoreimportancethanthechoice.Thereisnoabsoluterightorwrongchoicebutwonderfulorboringlife,whichtheprocessmakesthedifference. Lifeisaboxofchocolate.Youneverknowwhatyouwillget. ForrestGumpmadenodecisionbyandforhimself,butheaomplishedgreatsuesswithhisstrongwillintheprocess.Theprocessisnottheroaditselfbuttheattitudesandfeelings,thecaution,courageandpersistancewehaveasweencounternewexperienceandunexpectedobstacles.Takemyselfasanexample,IchangedmymajorwhenI becameapostgraduate.Afterthechoice,dayshavebeenharshforme.Icannotunderstandthenewlessonsatall.FortheyarecloselyrelatedtomathmaticswhichIlearnednothingaboutbefore.Howeverthebeliefthatthisisthegreatchanceformetoexperiencenewideasandchallengemyself,Ipersisted.Iaskedforhelpfromeverychannelandreorganizedmylife.GraduallyIcouldunderstandsomepartsandevenfoundthat mathsinteresting,Ilearnedtoactinsteadofplaining.Inretrospect,thechoiceleftnotraceinmymindbutthehappinessandbitternessofthepastfourmonthsbeesanunforgetableexperienceinmylife. Nomatterwhatthechoiceis,enjoytheprocess.Intheprocess,yourpotentialwillbeinspiredandnewdiscoveries,improvementandprogresswilletoyou.Thesearethemostbeautifulsceneriesandonlyonthewaycanyouseeit.Thesemakeyourlifecolorful. ThereisnoneedandIdontwanttojudgewhetheritrightorwrongformetobehere.ButIc