(a)
(b)
(c)
(d)
(e)
(f)
Figure 4: Coexistence of different attractors with different parameter a. (a) Quasiperiods with different shape; (b) chaos and quasiperiod; (c) chaos and complicated period; (d) chaos and period-1; (e) chaos and quasiperiod; (f) period and chaos, for the initial conditions (0.1, 0, 0) and (0.2, 0, 0), respectively.