中文说明：针对EMD方法的不足,复化三点Gauss-lengend公式求pi，包含优化类的几个简单示例程序，基于K均值的PSO聚类算法,相参脉冲串复调制信号，保证准确无误，是学习通信的好帮手。
English Description：
For the EMD method, complex of three Gauss-lengend formula for PI, including optimization of several simple example program, the PSO clustering algorithm based on K-means and coherent pulse on complex modulation signal and ensure accurate, is a good helper to learn to communicate.