Figure 4

Bifurcation diagram determined for large values of${\alpha }_1^{″}$and α″, constructed by taking slopes of lines as m and 1/ M with m = M = 2. The following three representative sets of parameters are chosen for the detailed simulations: Case A, in bistable region (α″ = 15.6 and ${\alpha }_2^{″}$ = 15.6); Case B, on bifurcation curve (${\alpha }_1^{″}$ = 15.6 and ${\alpha }_2^{″}$ = 4.0); Case C, in monostable region (${\alpha }_1^{″}$ = 15.6 and ${\alpha }_2^{″}$ = 1.2).