胎兒心率檢測與非線性分析的研究.pdf

1、哈爾濱理工大學(xué)碩士學(xué)位論文胎兒心率檢測與非線性分析的研究姓名：袁飛申請學(xué)位級別：碩士專業(yè)：控制理論與控制工程指導(dǎo)教師：陳海燕20090301哈爾濱理丁大學(xué)T學(xué)碩lj學(xué)位論文StudyonFetalHeartRate’SDetectionandNon—linearAnalysisAbstractFetalheartrate’SdetectioniSoneofthemostimportantprojectsoffetalmonitoring

2、Changesinfetalheartratearecloselyrelatedtofetalwell—being，oxygenstatusanddynamicstatusPerinatalperiod，especiallyinlatepregnancyandparturitionprocess，monitorfetalheartrate，timelydetectionoffetalhypoxiaanddistressinuterus，

3、takeappropriatemeasuretoprotectthehealthofthenewbornAccurateextractionoffetalheartrateistheprerequisiteofdeterminethehealthstatusoffetusUltrasounddopplerheartratedetectionwithhighsensitivitynoninvasiveandeasytooperate，et

4、c，hasbeenwidelyusedHoweverduetothehumanbodyisacomplexexerciseenvironment，especiallyintheperinatalperiod，fetalheartrateisrelativelyweakInaddition，maternalenvironmentalinterference，obtainultrasounddopplerfetalheartechosign

5、alcomponentmorecomplexandinterference，difficulttodirectlyreadthevalueoffetalheartrate，thereforenecessarytodealwithdenoisingInthispapertranslationinvariantwaveletdenoisingmethodisusedtodenoisingforultrasounddopplerfetalhe

6、artechosignal，givesuitabledecompositionlevel，waveletbase，thresholdfunctionandthresholdapproachComparethedenoisingeffectbetweentraditionalwaveletthresholddenoisingmethodandtranslationinvariantwaveletde—noisingmethod(thetr

7、aditionalwaveletthresholdde—noisingmethodcaneffectivelyeliminatethenoiseinsignals，butatthesametimemayproducePsuedo—Gibbsphenomena)TheresearchresultsshowthatthismethodcaneffectivelysuppresssignalnoiseandPseudoGibbsphenome