搜文檔
認(rèn)證信息
認(rèn)證類(lèi)型:個(gè)人認(rèn)證
認(rèn)證主體:常**(實(shí)名認(rèn)證)
IP屬地:河北
下載本文檔
版權(quán)說(shuō)明:本文檔由用戶提供并上傳,收益歸屬內(nèi)容提供方,若內(nèi)容存在侵權(quán),請(qǐng)進(jìn)行舉報(bào)或認(rèn)領(lǐng)
1、基于EMD的包絡(luò)相關(guān)算法研究專(zhuān)業(yè)名稱(chēng):電子科學(xué)與技術(shù)申請(qǐng)人:何經(jīng)偉指導(dǎo)教師:胡維平教授論文答辯委員會(huì)主席:委員:蘭露廣西師范大學(xué)碩士論文ResearchonthemethodrelatetotheenvelopeofEMDMasterCandidate:HeJingweiSupervisor:HuWeipingMajor:ElectronicscienceandtechnologyResearchDirection:signalproc
2、essingGrade:2012AbstractAlmosta11thesignaliSnonlinearnonstationaryinreallifeThetimefrequencyanalysismethodhasbeenpaymoreattentiontostudyforprocessingnon1inearandnonstationarysignalHilberthuangtransformisanewmethodoftimef
3、requencyanalysisafterFouriertransfoITn,wavelettransformThecoreideaofhilberthuangtransformiStheempiricalmodedecompositionEmpiricalModeDecomposition(EMD)isalocaldigitalsignalprocessingmethod,fullybasedonadaptivedata,iSvery
4、suitableforanalyzingnonstationaryandnonlinearproperties,multicomponentsignalThemethodbreaksthroughtheconventionalideasoftraditionalsignalprocessing,theprocessingmethodissimple,andCanmoreaccurateanalysisinstantaneouschara
5、cteristicsofthenonlinearsignal111emethodhasgoodapplicationprospectinnonlinearnonstationarysignalprocessingdirection,thuswontheattentionofacademiccirclesAtpresent,manyscholarshascarriedontheimprovementofrelatedresearchinv
6、iewofthedefectsanddisadvantagesoftlleEMD,hasachievedgreatachievementmaketheflawsoftheEMDarewellimproved,hasprovidedabroadplatformfortheengineeringapplicationoftheEMD111iSpapermainlystudytheEMDtheorymethodThespecificworkc
7、ontentofthepaperasfollows:First,ThisPaperdetailelaboratedthestandardempiricalmodedecompositionalgorithmwhichbyNEHuangputforwardSecondaccordingtothestandardEMDhastheincompleteenvelopesituationwhenstructuretheenvelopeincub
8、icsplineinterpolationmethodnleproblemistheenvelopewillcuttingsignallineImprovetheenvelopealgorithmttoimprovethestandardsEMDalgorithm,andtheeffectivenessoftheimprovemethodiSverifiedbyexperimentTllirdtheoptimalmeanenvelope
9、,theorthogonalitystoppingcriteriaoftheinverseEMDalgorithmprocessWasintroducedinthisPaperTheauthortestandcomparedtheorthogonalityindexandenergy1eakindexofthestandardEMD,beforeoftheimprovedinverseEMD,andtheimprovedinverseE
10、MD,analysedandcomparedtheadvantagesofoptimalenvelopemeanandotherenvelopemean,studiedtheeffectofEMDdecompositionbyenhancesamplingrateFourth,thisP印erintroducesthefastbandpassfilterinwinsicmodefunctiondecompositionmethod『31
11、thatputforwardbylizhenzhangThefastfilteringmethodCaneffectivelyovercomethemodalaliasingphenomenonisverifiedbyanexample碭einnovationofthepaperasfollows:First,throughthepointoftangencytofittingenvelopeinsteadoftheconvention
12、almethodofextremevaluepointtofittingenvelopeintheenvelopefittingprocess,CanavoidappearringovershootandundershootphenomenonwhenfittingenvelopeneartheextremevaluepointtheeffectivenessoftheimproveingtheEMDalgorithmiSverifie
13、dbyexperimentSecond,thesecondorderoptimalenvelopemethodisproposedinreversescreeningoftheEMDalgorithmtoavoidexcessivescreeningouttheothercomponentwhichofwithoutphysicalmeaning,thispaperuseimprovingenvelopemethodintheEMDal
0/150
提交評(píng)論
聯(lián)系客服
本站為文檔C2C交易模式,即用戶上傳的文檔直接被用戶下載,本站只是中間服務(wù)平臺(tái),本站所有文檔下載所得的收益歸上傳人(含作者)所有。眾賞文庫(kù)僅提供信息存儲(chǔ)空間,僅對(duì)用戶上傳內(nèi)容的表現(xiàn)方式做保護(hù)處理,對(duì)上載內(nèi)容本身不做任何修改或編輯。若文檔所含內(nèi)容侵犯了您的版權(quán)或隱私,請(qǐng)立即通知眾賞文庫(kù),我們立即給予刪除!
Copyright ? 2013-2023 眾賞文庫(kù)版權(quán)所有 違法與不良信息舉報(bào)電話:15067167862
復(fù)制分享文檔地址
http://www.airport-pavements-failure.com/shtml/view-1709739.html
復(fù)制
下載本文檔
評(píng)論
0/150
提交評(píng)論