6N.E.Huang,Z.Shen,S.R.long,et al / The empirical mode decomposition and the Hilbert spectrum for nonlinear and nonstationary time series analysis[J].Pro.Roy.Soc.London.A,1998,454:903-995
7G.Rilling,P.Flandrin,et al.On Empirical Mode Decomposition and its algorithms[A].IEEE-EURASIP Workshop on Nonlinear Signal and Image Processing[C].NSIP-03,Grado (I),June 2003