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1、TheKalmanfilterbasedresearchofT-wavealternansdetectionalgorithmAbstract:Asthesecondlargestcauseofdeathinhumanbeingsonlybehindcancer,suddencardiacdeath(SCD-SuddenCardiacDeath)isfeaturedassuddenonsetanddifficulttorescue.Therefore,forthesepatients,earlydiagnosis,earlyinterventionisthemosteffective
2、treatment.TWA(Twavealternans)asthedetectionofSCD-likeillnessisanimportantindicatorofhow(non-invasive)toobtainaccuratedatainaTWAresearchwhichisfocusedoninrecentyearsintheindustry.ThispaperpresentsamodifiedKalmanfilter-based(non-steadystate)TWAdetectionalgorithm:Firstofall,preprocessing,filtering
3、noiseandbaselinedriftofECG;methodusingwavelettransformmodulusextremumofQRSandTwaves,seevehiclefeatureslocationofthepoint;furtheralignmentandextractstheTwaveTwavematrix;accordingtothestrategy(inaccordancewiththeoddandeven)ontheTwavematrixre-grouping;KalmanfilterwereusedontwogroupsofTwavematrix;c
4、alculatethedifferencebetweentwogroupsofTwavematrix,thenthevectormodulusmaximatoidentifythevectorthroughvectormaximamodules,andmakesthemeanvectorasthetestingstandards.Throughsimulationresults，thisalgorithmforthecorrelationcoefficientofTWAdetectionvaluesandrealvaluesreaches97%,andnotonlycanittest
5、therateofTwavealternans,butalsocanidentifyshort-termTwavealternans.[keyword]:TWAKalmanextremumofwavelettransformmodulusSuddenCardiacDeath[Introduction]:Suddencardiacdeath(SCD-SuddenCardiacDeath)isadeathcausedbyheartattack.Accordingtotheagency'sstatistics,suddencardiacdeathhasbecomethesecondlarg
6、estcauseofdeathaftercancer.Thereareabout45.000casesinUnitedStates,andover1.8millioncasesperyearinChinaAdditionally,theincreasinglyseriousenvironmentalpollution,thepressurecontinuedtoincrease,thisfigureisconstantlyincreasingbecauseoftheincreasinglyseriousenvironmentalpollutionandthecontinuedpres
7、sure.Astheincidencesuddencardiacdeathhavethecharacterofsuddenonsetanddifficulttorescueoncethediseasehappens,thereislittletimeleftformedicinepersonnel,thusthesurvivalrateisverylow.Therefore,themaintreatmentforsuddencardiacdeathisth
