Datasets:
| \left\{\begin{array}{l}L_{\varepsilon} u=L u-\varepsilon u_{x^6}=0, \quad 0<\varepsilon<1 \\u(x, t)=u(x+2 D, t), \quad D>0 \\u(x, 0)=\psi_{\varepsilon}(x), \psi_{\varepsilon}(x)=\psi_{\varepsilon}(x+2 D)\end{array}\right. |
| \left\{\begin{array}{l}L_{\varepsilon} u=L u-\varepsilon u_{x^6}=0, \quad 0<\varepsilon<1 \\u(x, t)=u(x+2 D, t), \quad D>0 \\u(x, 0)=\psi_{\varepsilon}(x), \psi_{\varepsilon}(x)=\psi_{\varepsilon}(x+2 D)\end{array}\right. |