中文说明：
此程序也是HHT中EMD实现方法之一，程序完整，一共三种方法，有助于初学者全面掌握HHT的程序实现。
English Description：
This program is also one of the methods of EMD implementation in HHT, the program is complete, a total of three methods, help beginners to fully grasp the HHT program implementation.