先按一定要求生成两幅粒子图像，然后基于相关检测的方法测出粒子的运动速度，仿真的是简单情况 ，即水平运动的情况。属于基础学习用的。-Press must be to generate two particle image, and then based on correlation detection method to measure particle velocity, simulation of a simple situation, that is the case of horizont