利用修正的CK直接约化方法,把变系数KdV-Burgers方程约化为等价的常系数方程,得到了常系数和变系数KdV-Burgers方程的解之间的关系.另外,我们运用李群方法求得了常系数KdV-Burgers方程的解,从而获得了变系数KdV-Burgers方程的精确解.
Using the improved direct reduction method,we find the equivalence transformation of KdV-Burgers equations with variable eoeffidents,and obtain the correspondi.4g the relationshipbetween the solutions of KdV-Burgets equation and ones of the corresponding KdV-Burgersequation with constant coefficients is found. In addition, we get some explicit solutions of KdV-Burgers equation by Lie symmetry method.