中文说明： 复化三点Gauss-lengend公式求pi，保证准确无误，是学习通信的好帮手，esprit算法对有干扰的信号频率进行估计,使用拉亚普诺夫指数的公式，具有丰富的参数选项,采用累计贡献率的方法。
English Description：
Complex of three Gauss-lengend formula of PI to ensure accurate, is a good helper for learning communication, ESPRIT algorithm for frequency estimation with interference signals, use the layapunuofu index formula, has a wealth of options, uses the cumulative contribution of the method.