说明：  此程序用于画混沌系统的相图及其庞加莱截面，使用时只需要写出相应的混沌微分方程，便可画出相应的图。
(This procedure for drawing the phase diagram of chaotic systems and its Poincare section, when used only need to write the corresponding chaotic differential equations, will be able to draw the corresponding graph.)