中文摘要：

一个新概括扩大 F 扩大方法为在数学物理发现非线性的进化方程的周期的波浪答案被介绍。作为这个方法的应用，我们学习(2+1 ) 维的散长波浪方程。在计算机化的符号的计算的帮助下，很多个二倍地周期的波浪解决方案由 variousJacobi 表示了椭圆形的函数被获得。在限制盒子中，独居的波浪答案也被导出。

英文摘要：

A new generalized extended F-expansion method is presented for finding periodic wave solutions of nonlinear evolution equations in mathematical physics. As an application of this method, we study the （2＋1）-dimensional dispersive long wave equation. With the aid of computerized symbolic computation, a number of doubly periodic wave solutions expressed by various Jacobi elliptic functions are obtained. In the limit cases, the solitary wave solutions are derived as well.