中文说明： pwm整流器的建模仿真，构成不同频率的调制信号，计算多重分形非趋势波动分析，ldpc码的编解码实现，三相光伏逆变并网的仿真，音频信号通过LM386放大。
English Description：
Modeling and simulation of PWM rectifier constitute signals of different frequencies, non-trend volatility calculated multifractal analysis, encoding and decoding of LDPC codes implementation, simulation of three phase photovoltaic grid-connected inverter, audio signals through the LM386 amplifier.