Introduction - If you have any usage issues, please Google them yourself
There15agreatdealofnon一stationarysingalsinmachineryoPeration.Buttraditional
timedomainanalysisandrfequeneydomainanalysishvaemnaylimitationswith
non一stationarysignals.Wavelettransofmrbasesonbaseufnction,leanrsthecharaeteristiesof
trianglebaseofFourierTransofmrandwindowufnetionofShort一TimeFourierTransofmr,
andofmrsoscillatoryanddamPedbaseufnction.It15Praisedasa“mathematiealmieroseoPe,,
beeauseofitsmulti一sealeandtime一rfequeneycharaeteristiesandbeeomesanimPortanttool
ofrdealingwithnon一stationarysials.