测控专业英语第四课

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1、Lesson4RandomSignalsBackgroundsTexttourLanguageinuseVocabularyStructureReading/writingtechniques9/16/20211《测控技术与仪器英语教程》BackgroundsTerminologyBayes’rule贝叶斯公式Correlationfunction相关函数Morsecode莫尔斯码Neurophysiology神经生理学Normaldistribution正态分布Poissondistribution泊松分布Probability概率Standarddev

2、iation标准偏差Time-shiftedversion时移形式Expect期望Standarddeviation标准方差9/16/20212《测控技术与仪器英语教程》TexttourOutline4.1Introduction4.2ElementsofProbabilityTheory4.3AmplitudeDistributionandMoments4.4TheAutocorrelationandPowerSpectralDensity9/16/20213《测控技术与仪器英语教程》4.1IntroductionThebackgroundofrand

3、omsignalsExampleaboutseveralsignalsFigure4.1Signaldisplaying(a)randomamplitude,(b)randomtimingoftransitionbetweenfixedlevels,and(c)randomamplitudeandtimingcomponentsinanessentiallyrepetitivewaveform.9/16/20214《测控技术与仪器英语教程》4.1IntroductionTheoriginofrandomsignalandthewayofdealingwit

4、hit9/16/20215《测控技术与仪器英语教程》4.2ElementsofProbabilityTheory4.2.1TheprobabilityofanEvent4.2.2JointandConditionalProbabilities4.2.3TheProbabilityDensityFunction9/16/20216《测控技术与仪器英语教程》4.2.1TheProbabilityofanEventUsingexamplestodefinetheprobabilityofaneventthebasicadditivelawofprobabilit

5、y=9/16/20217《测控技术与仪器英语教程》4.2.2JointandConditionalProbabilitiesThejointprobabilityTheconditionalprobabilitiesTheBayes’rule,relatestheconditionalprobabilityofAgivenBtothatofBgivenA.9/16/20218《测控技术与仪器英语教程》4.2.2JointandconditionalprobabilitiesThestatisticallyindependentThejointandcond

6、itionalprobabilities’relevancetosignalsandsignalanalysisFigure4.2(a)Aportionofarandomsampled-datasignalwithsixdiscretelevelsand(b)theprobabilitiesassociatedwitheachlevel9/16/20219《测控技术与仪器英语教程》4.2.3TheProbabilityDensityFunctiontheprobabilitydensityfunctionFigure4.3Acontinuousrandom

7、signal9/16/202110《测控技术与仪器英语教程》4.2.3TheProbabilityDensityFunctionExample9/16/202111《测控技术与仪器英语教程》4.3AmplitudeDistributionandMomentsamplitudedistributions:ⅰ)deterministicsignals9/16/202112《测控技术与仪器英语教程》4.3AmplitudeDistributionandMomentsⅱ)theamplitudedistributionofasignaltellsusnothing

8、aboutitsdetailedstructureorspectr