英语作文数据分析报告范文.docx
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英语作文数据分析报告范文.docx
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英语作文数据分析报告范文
英语作文数据分析报告范文
1.写篇英语作文调查报告
AReportonChildren'sGratitudetoTheirParents
Children'slivesaregivenbytheirparentsandoriginally,childrenshouldbegratefultothem.Hower,notallthechildrencandoso.Areportmaderecentlysuggeststhatone-fourthofthepeoplethinkthattoraisechildrenisthedutyoftheirparentsandsochildrenneedn'texpressanygratitudetothem.Anotherone-fourthofthepeoplesupposethatthereisabiggapbetweenthemandtheirparents.Theydon'tknowhowtocommunicatewiththeirparents,letalonetosaygratitude.Otherssaythattheyhatetoexpressanygratitude.Itisboring.
TorespectparentsandexpressourgratitudetothemisagoodtraditionofChinesepeople.AsfarasIamconcerned,toweshouldshowourrespectandgratitudetoourparents.Theygivebirthtous,andundoubtedlywearesupposedtobegratefultotheminreturn.
2.有关数据采集的英文文章5000字左右
Dataacquisitionisthesamplingoftherealworldtogeneratedatathatcanbemanipulatedbyacomputer.SometimesabbreviatedDAQorDAS,dataacquisitiontypicallyinvolvesacquisitionofsignalsandwaveformsandprocessingthesignalstoobtaindesiredinformation.Thecomponentsofdataacquisitionsystemsincludeappropriatesensorsthatconvertanymeasurementparametertoanelectricalsignal,thenconditioningtheelectricalsignalwhichcanthenbeacquiredbydataacquisitionhardware.Acquireddataaredisplayed,analyzed,andstoredonacomputer,eitherusingvendorsuppliedsoftware,orcustomdisplaysandcontrolcanbedevelopedusingvariousgeneralpurposeprogramminglanguagessuchasBASIC,C,Fortran,Java,Lisp,Pascal.SpecializedprogramminglanguagesusedfordataacquisitionincludeEPICS,usedtobuildlargescaledataacquisitionsystems,LabVIEW,whichoffersagraphicalprogrammingenvironmentoptimizedfordataacquisition,andMATLABwhichprovidesaprogramminglanguage,andalsobuilt-ingraphicaltoolsandlibrariesfordataacquisitionandanalysis.HowdataisacquiredSourceDataacquisitionbeginswiththephysicalphenomenonorphysicalpropertyofanobject(underinvestigation)tobemeasured.Thisphysicalpropertyorphenomenoncouldbethetemperatureortemperaturechangeofaroom,theintensityorintensitychangeofalightsource,thepressureinsideachamber,theforceappliedtoanobject,ormanyotherthings.Aneffectivedataacquisitionsystemcanmeasureallofthesedifferentpropertiesorphenomena.Atransducerisadevicethatconvertsaphysicalpropertyorphenomenonintoacorrespondingmeasurableelectricalsignal,suchasvoltage,current,changeinresistanceorcapacitorvalues,etc.Theabilityofadataacquisitionsystemtomeasuredifferentphenomenadependsonthetransducerstoconvertthephysicalphenomenaintosignalsmeasurablebythedataacquisitionhardware.TransducersaresynonymouswithsensorsinDAQsystems.Therearespecifictransducersformanydifferentapplications,suchasmeasuringtemperature,pressure,orfluidflow.DAQalsodeployvarioussignalconditioningtechniquestoadequatelymodifyvariousdifferentelectricalsignalsintovoltagethatcanthenbedigitizedusingADCs.SignalsSignalsmaybedigital(alsocalledlogicsignalssometimes)oranalogdependingonthetransducerused.SignalconditioningmaybenecessaryifthesignalfromthetransducerisnotsuitablefortheDAQhardwaretobeused.Thesignalmaybeamplifiedordeamplified,ormayrequirefiltering,oralock-inamplifierisincludedtoperformdemodulation.Variousotherexamplesofsignalconditioningmightbebridgecompletion,providingcurrentorvoltageexcitationtothesensor,isolation,linearization,etc.Analogsignalstoleratealmostnocrosstalkandsoareconvertedtodigitaldata,beforecomingclosetoaPCorbeforetravelingalonglongcables.Foranalogdatatohaveahighsignaltonoiseratio,thesignalneedstobeveryhigh,andsending+-10Voltsalongafastsignalpathwitha50Ohmterminationrequirespowerfuldrivers.Withaslightlymismatchedornoterminationatall,thevoltagealongthecableringsmultipletimeuntilitissettledintheneededprecision.Digitaldatacanhave+-0.5Volt.ThesameistrueforDACs.AlsodigitaldatacanbesentoverglassfiberforhighvoltageisolationorbymeansofManchesterencodingorsimilarthroughRF-couplers,whichpreventnethum.Alsoasof200716bitADCscostonly20$orDAQhardwareDAQhardwareiswhatusuallyinterfacesbetweenthesignalandaPC.Itcouldbeintheformofmodulesthatcanbeconnectedtothecomputer'sports(parallel,serial,USB,etc。
)orcardsconnectedtoslots(PCI,ISA,PCI-E,etc。
)inthemotherboard.UsuallythespaceonthebackofaPCIcardistoosmallforalltheconnectionsneeded,soanexternalbreakoutboxisrequired.ThecablebetweenthisBoxandthePCisexpensiveduetothemanywiresandtherequiredshieldingandbecauseitisexotic.DAQ-cardso
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