运用离散分数阶微积分,提出了分数阶标准映射和余弦映射.当差分阶是分数阶时,从数值上讨论了混沌现象,进一步展示了分岔图和相位图.
We propose fractional standard cosine maps by using the discrete fractional calculus. Then, we numerically discuss the chaos behaviors when the difference order is a fractional one. In the end, the bifurcation diagrams and the phase portraits are presented, respectively.