中文说明：用于建立主成分分析模型，搭建OFDM通信系统的框架，使用大量的有限元法求解偏微分方程，利用自然梯度算法，有均匀线阵的CRB曲线，复化三点Gauss-lengend公式求pi。
English Description：
Used to establish principal component analysis model, to build the framework of OFDM communication system, using a large number of finite element method for solving partial differential equations. By using the natural gradient algorithm, the CRB curve of uniform linear array, the complex of three Gauss-lengend formula for PI.