extraneous variable

It can target and control any point in chaotic or bifurcation regions by adjusting parameter and variable perturbation at the same time.

实现了沿参数轴对不稳定周期轨道的连续控制，通过同时应用调节参数与变量微扰可实现对混沌区与分岔区中任一点的瞄准。