EEMD 信号提取

代码说明：

EEMD 信号特征提取的源码，包含EMD ，eemd和hilbert变换。 % INPUT: %       Y: Inputted data; %       Nstd: ratio of the standard deviation of the added noise and that of Y; %       NE: Ensemble number for the EEMD % OUTPUT: %       A matrix of N*(m+1) matrix, where N is the length of the input %       data Y, and m=fix(log2(N))-1. Column 1 is the original data, columns 2, 3, ... %       m are the IMFs from high to low frequency, and comlumn (m+1) is the %       residual (ov