483492.fig.0019a
(a)
483492.fig.0019b
(b)
483492.fig.0019c
(c)
483492.fig.0019d
(d)
Figure 19: (The periodic wave become the trivial wave). The varying process for the graph of when , , , , and , where , , , , and (a) . (b) . (c) . (d) .