中文说明：计算晶粒的生长，入门级别程序,计算十字叉丝的在不同距离的衍射图像,详细画出了时域和频域的相关图，进行逐步线性回归，ldpc码的编解码实现，三相光伏逆变并网的仿真。
English Description：
Calculation of grain growth and entry level program, calculate the cross hairs at different distances of the diffraction image, detailed drawing in time domain and frequency domain correlation, stepwise linear regression, encoding and decoding of LDPC codes implementation, simulation of three phase photovoltaic grid-connected inverter.