中文说明：应用背景通过matlab编写经验模态分解，先通过小波包对信号进行降噪，将去噪后的信号进行分解，得到各节IMF分量。 关键技术通过matlab编写经验模态分解可将信号分解为各节IMF分量。与小波分解不同，极大改善了非平稳信号的分解问题
English Description：
Application backgroundThe empirical mode decomposition is written by MATLAB, and the signal is decomposed by wavelet packet, and the signal is decomposed by wavelet packet, and the IMF component of each node is obtained.Key TechnologyThe signal can be decomposed into the IMF component by the empirical mode decomposition of MATLAB. Different from wavelet decomposition, the decomposition of non-stationary signal is greatly improved.