(a)
(b)
Figure 9: Bistability behaviors obtained in Simulink of MATLAB, the running time t = 100 s. (a) α = 0.75, two sets of the initial values (0.1, 0.1, 0.2) and (0.1, 0.1, −0.2); (b) α = 0.99, two sets of the initial values (−4, 0.1, 4) and (0, 0.1, −1).