中文说明：基于四阶累积量的联合对角化，其中给出两种四阶累积量计算方法，方便理解。这个算法还是比较难的，可以参看下独立分量分析中的jade算法
English Description：
Based on the joint diagonalization of fourth-order cumulants, two calculation methods of fourth-order cumulants are given to facilitate understanding. This algorithm is still relatively difficult, you can refer to the jade algorithm in independent component analysis