简介：Wienerfilteringisusedtoestimatereceiverfunctioninatime-domain.Withtheverticalcomponentof3-componentteleseismicPwaveformastheinputofaWienerfilter,receiverfunctionasthefilterresponse,andradialandtangentialcomponentsastheexpectedoutput,receiverfunctionisestimatedbyminimizingtheerrorbetweenexpectedandactualoutputs.ReceiverfunctioncanbeobtainedbysolvingtheToeplitzequationusingtheLevinsonalgorithm.Thenon-singularityoftheToeplitzequationensuresthestabilityofWienerDeconvolution.BothsyntheticandobservationalseismogramcheeksshowthatWienerDeconvolutionisaneffectivetime-domainmethodtoestimatereceiverfunctionfromteleseismicPwaveform.

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简介：Ithasbeenwellstudiedthattheγ-functionexplicitmethodcanbeeffectiveinprovidingfavorablenumericaldissipationforlinearelasticsystems.However,itsperformancefornonlinearsystemsisunclearduetoalackofanalyticalevaluationtechniques.Thus,anoveltechniqueisproposedhereintoevaluateitsefficiencyforapplicationtononlinearsystemsbyintroducingtwoparameterstodescribethestiffnesschange.Asaresult,thenumericalpropertiesanderrorpropagationcharacteristicsoftheγ-functionexplicitmethodforthepseudodynamictestingofanonlinearsystemareanalyticallyassessed.Itisfoundthattheupperstabilitylimitdecreasesasthestepdegreeofnonlinearityincreases;anditincreasesasthecurrentdegreeofnonlinearityincreases.Itisalsoshownthatthisintegrationmethodprovidesfavorablenumericaldissipationnotonlyforlinearelasticsystemsbutalsofornonlinearsystems.Furthermore,errorpropagationanalysisrevealsthatthenumericaldissipationcaneffectivelysuppressthesevereerrorpropagationofhighfrequencymodeswhilethelowfrequencyresponsesarealmostunaffectedforbothlinearelasticandnonlinearsystems.

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简介：Inthisarticle,weanalyzethecharactersofSV-componentreceiverfunctionofteleseismicbodywavesanditsadvantagesinmappingtheS-wavevelocitystructureofcrustindetail.Similartoradialreceiverfunction,SV-componentreceiverfunctioncanbeobtainedbydirectlydeconvolvingtheP-componentfromtheSV-componentofteleseismicrecordings.OuranalysesindicatethatthechangeofamplitudeofSV-componentreceiverfunctionagainstthechangeofepicentraldistanceislessthanthatofradialreceiverfunction.Moreover,thewaveformofSV-componentreceiverfunctionissimplerthantheradialreceiverfunctionandgivesprominencetothePSconvertedphasesthatarethemostsensitivetotheshearwavevelocitystructureintheinversion.ThesynthetictestsshowthattheconvergenceofSV-componentreceiverfunctioninversionisfasterthanthatoftheradialreceiverfunctioninversion.Asanexample,weinvestigatetheS-wavevelocitystructurebeneathHIAstationbyusingtheSV-componentreceiverfunctioninversionmethod.

简介：Basedonthefittingonpaleoearthquakedataofintra-plateregionsinthenorthernpartofChi-naandgivingastatisticalmodeloftimeinterdependence,thepotentialdamageearthquakesinadefinitefutureperiodandcharacteristicsofpresentshocksalongtheLingwufaulthavebeenanalyzedbyusingdangerousprobabilityfunctionandsomenewdataconcerned.Wehavein-ferredthatthefaulthasenteredaperiodthatearthquakeswillprobablyoccur.ThereexistsapotentialdangerthatastrongearthquakewithMs7.0-7.5willoccurin10-100a.