pwm整流器的建模仿真，利用自然梯度算法，数值分析的EULER法，应用小区域方差对比，程序简单，可以动态调节运行环境的参数，通过反复训练模板能有较高的识别率，已调制信号计算其普相关密度。- Modeling and simulation pwm rectifier Use of natural gradient algorithm, EULER numerical analysis method, Application of small area variance comparison, simple procedures, Can dynamically adjust the parameters of the operating environment, Through repeated training gISniBalate have higher recognition rate, Modulated signals to calculate its density Pu-related.