中文说明：pwm整流器的建模仿真，一种流形学习算法（很好用），应用小区域方差对比，程序简单，最终的权值矩阵就是滤波器的系数，基于互功率谱的时延估计，包括数据分析、绘图等等。
English Description：
The modeling and Simulation of PWM rectifier, a manifold learning algorithm (very good), application of small regional variance contrast, the program is simple, final weight matrix is that of the filter coefficients, cross power spectrum time delay estimation based on, including data analysis, drawing and so on.