Figure 1. One-soliton solution Qpq at y = 0 in (4.19) with the parameters chosen as ${\sigma }_{1}^{(1)}=0.1$, ${\phi }_{1}^{(1)}=\pi /6;{\sigma }_{1}^{(2)}=0.2$, ${\phi }_{1}^{(1)}=\pi /2;{\sigma }_{1}^{(3)}=0.3$, ${\phi }_{1}^{(3)}=2\pi /3$ and ${a}_{1}=0.2,{a}_{2}=0.4$, ${a}_{2}=0.6;{b}_{1}=0.3$, ${b}_{2}=0.5,{b}_{3}=0.7$.
