是学习PCA特征提取的很好的学习资料，三相光伏逆变并网的仿真，毕业设计有用，基于分段非线性权重值的Pso算法，有信道编码，调制，信道估计等。-Is a good learning materials to learn PCA feature extraction, Three-phase photovoltaic inverter and network simulation, Graduation useful Based on piecewise nonlinear weight value Pso algorithm, Channel coding, modulation, channel estimation.