简介:Inthispaper,thecloserelationshipamongwavelettransformandquadraturemirrorfilter(QMF)banksandthescattering-matrixofwavedigitalfilter(WDF)isandlyzedindetail.TheparametrizationoforthonormalcompactlysupportedwaveletbasesthathaveanarbitrarynumberofvanishingmomentisobtainedbybuildinganyQMFpairoutofelementaryfactorsofthescatteringmatrix.Inaddition,theoptimizationofparameterisalsopresented.Ascomparison,Someexamplesaboutorthonormalcompactlysupportedwaveletthathasarbitrarynumberofvanishingmomentandthemostnumberofvanishingmomentaregivenrespectively.Thenwegivetheefficientlatticestructuretoimplementthetransform.
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简介:ThearticlebrieflyintroducesthethreestagesthatChinaPostexperiencedandthecircumstancesofthefundamentalnetworkconstruction,focusingonintroducingthethreesortsofservicesbasedonpostalcomprehensivecomputernetwork'sapplicablesoftwaresystem:postalfinancialservice;traditionalserviceelectrified;electronicpostalservice.FinallythethinkingforfutureChinaPost'sinformationizingconstructingisputforward.