689319.fig.002a
(a)
689319.fig.002b
(b)
689319.fig.002c
(c)
689319.fig.002d
(d)
689319.fig.002e
(e)
689319.fig.002f
(f)
689319.fig.002g
(g)
689319.fig.002h
(h)
689319.fig.002i
(i)
689319.fig.002j
(j)
689319.fig.002k
(k)
689319.fig.002l
(l)
689319.fig.002m
(m)
689319.fig.002n
(n)
689319.fig.002o
(o)
Figure 2: The time histories and phase trajectories of system (4.1) with and the initial value (0.05, 0.05, 0.05, 0.025). Hopf bifurcation occurs from the equilibrium .