812120.fig.004a
(a)
812120.fig.004b
(b)
812120.fig.004c
(c)
812120.fig.004d
(d)
Figure 4: Four low-kink waves are bifurcated from four tall-kink waves. The varying process for the figures of and when ,  , , and , where , , and (a) , (b) , (c) , and (d) .