//用于显示图片的全局函数，传递设备环境对象和图片的路径即可-// Header: Declared in olectl.h. // Import Library: Included as a resource in olepro32.dll.

某控制系统的开环传递函数的分析,绘制系统的闭环根轨迹-An open-loop transfer function of the control system of the analysis of the drawing system of closed loop root locus