Fig. 4

Bifurcations in one parameter. The top shows the bifurcation diagram in ${\alpha }_2$. Different colors represent different solutions, and a thick/thin line indicates that such a solution is stable/unstable. The four diagrams at the bottom show details of the four marked regions in the top diagram. ${\tau }_1=11.6$, ${\tau }_2=20.3$, ${\alpha }_1=0.069$, ${\beta }_1=2$, ${\beta }_2=1.2$.