Fig. 1

$h=0.004\pi/12, a=2, b=3$, when the initial function is (1), the numerical solution of the problem (33) which is in the $[\frac{5\pi}{6}, 10\pi]$"

Fig. 2

$h=0.004\pi/12, a=2, b=3$, when the initial function is (1), the numerical solution's changing curve of the problem (33) which is in the $[-\frac{\pi}{12}, 10\pi]$"

Fig. 3

$h=0.004\pi/12, a=3, b=4$, when the initial function is (2), the numerical solution of the problem (33) which is in the $[\frac{5\pi}{3}, 10\pi]$"

Fig. 4

$h=0.004\pi/12, a=3, b=4$, when the initial function is (2), the numerical solution's changing curve of the problem (33) which is in the $[-\frac{\pi}{12}, 10\pi]$"

Fig. 5

$h=0.004\pi/12, a=3, b=4$, when the initial functions are (1) and (2), the numerical solutions of the problem (33) which is in the $[\frac{5\pi}{3}, 10\pi]$"

Fig. 6

$h=0.004\pi/12, a=3, b=4$, when the initial functions are (1) and (2), the numerical solutions' changing curve of the problem (33) which is in the $[-\frac{\pi}{12}, 10\pi]$"