An extension of the KPII equation is studied. Adding a new fourth-order derivative term and some second-order derivative terms, we formulate an extended KPII equation. Different types of solutions of the extended equation are obtained by the Hirota bilinear method, and the presented solutions include soliton solutions, lump solutions and interaction solutions. Their dynamical behaviors are analyzed through plots.

中文翻译：

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结合新的四阶项的扩展 KPII 方程的丰富解

研究了 KPII 方程的扩展。添加一个新的四阶导数项和一些二阶导数项，我们制定了一个扩展的 KPII 方程。用广田双线性方法得到了扩展方程的不同类型的解，给出的解包括孤子解、集中解和相互作用解。通过绘图分析它们的动态行为。