一个多线程的网络数据采集系统（服务器端）客户端从服务器端收数据，服务器端模拟生成数据-a multithreaded network data acquisition system (server side) from the client server admission data, the server-generated simulation data

Numerical solution of differential equations method, The entire training process BP neural network, Synthetic Aperture Radar (SAR) imaging simulation target.