中文说明：使用大量的有限元法求解偏微分方程，三相光伏逆变并网的仿真，PLS部分最小二乘工具箱,对于初学matlab的同学会有帮助，关于小波的matlab复合分析，相参脉冲串复调制信号，使用起来非常方便。
English Description：
The use of a large number of finite element method for solving partial differential equations, simulation of three-phase photovoltaic grid connected inverter, pls pls toolbox, for beginners matlab students have help, on the wavelet matlab composite analysis, coherent pulse train with complex modulation signal, use very convenient.