用同伦摄动法给出变系数KdV-MKdV方程的二阶近似解,并与该方程的类扭状解进行了误差比较.结果显示,所得的近似解具有很高的精确度.
The homotopy perturbation method(HPM) is implemented for finding the second order approximate solutions of the variable coefficients KdV-MKdV equation,and error comparison with the class of kink-like solutions.The results show that the approximate solutions admit a remarkable accuracy.