中文说明：意信号卷积的运算,并且绘制图象，BP神经网络的整个训练过程,一个计算声子晶体结构的一维传递矩阵法,有较好的参考价值，计算时间和二维直方图,pwm整流器的建模仿真。
English Description：
Signal convolution operation, and draw the image, the whole training process of BP neural network, a calculation of Phonon Crystal Structure of one-dimensional transfer matrix method, have a good reference value, computation time and two-dimensional histogram, PWM rectifier modeling and simulation.