PulsediagnosisplaysavitalroleinTraditionalChineseMedicine(TCM).Toextracteffectiveandproperfeaturesfromthewrist-pulse-signalsisacrucialstepfortherecognitionandclassificationofthepulsesignals.Althoughtheanalysisinthetimedomainisalsoveryeffectiveforalotofpulsetypes(SHUetal.,2007),thefrequencyandtime-frequencyanalysisareusuallyusedintheliterature(YANetal.,2005;YUEetal.,2006)becausethepulsesignalsarenon-stationaryandnon-periodictimeseriesinthepathologicalstates.Inrecentyears,anewtime-frequencyanalysismethod,Hilbert-HUANGTransformproposedby
