包含收发两个客户端的链路级通信程序,可以实现模式识别领域的数据的分类及回归，该函数用来计算任意函数的一阶偏导数(数值方法)。- Contains two clients receive link-level communications program, You can achieve data classification and regression pattern recognition, This function is used to calculate the arbitrary function of the first order partial derivative (numerical methods).