Neimark-R.J.Sacker bifurcation and period-doubling bifurcation existed under certain parameters, which will evolve to chaos and hyperchaos with the variation of the parameters.

• 研究发现系统在一定参数条件下存在内衣马克一沙克分岔和倍周期分岔，随着参数的变化系统演化为混沌和超混沌。