用这个程序可以求出杜芬方程李雅谱诺夫指数-Using this program can find the Duffing equation Lyapunov index

用这个小程序可以解杜芬方程，可以通过相图判断混沌状态，判断加入噪声和信号-With this little program can Xie Duffing equation to determine the phase diagram can be chaos, judge by adding noise and signal

这是一个有关杜芬方程分岔的小程序，非常有用的。-This is a small program Duffing equation bifurcation, very useful.