VC、Opengl编写的屏幕保护程序 包含源码和执行程序 通过鼠标的拖动可控制环和球的转动-VC, Opengl prepared by the screen contains the source code and the procedures for implementation by dragging the mouse to control the ball and the Central Moment

通过工程设计法，设计双闭环参数，matlab仿真实现了直流电机电流转速双闭环控制。(Double closed loop control of current and speed of DC motor is realized)