一个关于EMD分解的程序，可以显示时频谱、IMF分解图和边际谱。-EMD decomposition of a program about when you can display the spectrum, IMF exploded and marginal spectrum.

电能质量扰动信号信号通过hilbert变换得到瞬时频率，瞬时幅值，hilbert谱，边际谱等重要特征，从而实现特征提取。-Power quality disturbance signals are obtained by hilbert transform to obtain instantaneous frequency, instantaneous amplitude, hilbert spectrum, marginal spectrum and other important featu