EMD

代码说明：

  经验模式分解EMD是将任意信号分解为本征模式函数组成的新方法，建立了以瞬时频率表征信号交变的基本量(The new method is empirical mode decomposition EMD any signal decomposition intrinsic mode functions that establish the basic amount to characterize the instantaneous frequency of the alternating signal)