vc++编写的车牌管理系统，对掌握各种控件用法及如何建立操作数据库有很大帮助！-license plate written in vc++ management system, master the use of various controls to operate the database and how to create great help!

对各种PID 控制算法的详细说明描述，并比较各种PID的用法-Detailed descr iption of the PID control algorithm described in age and compare the usage of the PID