PeEn

说明：  排列熵算法是一种动力学突变检测方法，能够方便、准确的定位系统发生突变的时刻，并且对于信号的微小变化具有放大作用
(Permutation entropy algorithm is a dynamic mutation detection method, which can easily and accurately locate the moment of system mutation and amplify the small change of signal)