对一时间序列进行EMD分解，产生若干经验模态。是HHT变换的前提。-EMD of a time series decomposition, resulting in a number of empirical mode，which is a prerequisite for HHT transformation.

EMD（经验模态分解）程序，用于将非平稳信号分解为一系列不同频率的分量，以方便对信号进行分析。-EMD (empirical mode decomposition) program for the non-stationary signal is decomposed into a series of different frequency components, in order to facilitate the analysis of the signal.