高校应用数学学报990306 关键词 非线性方程，精确解，直接代数方法，假设方法. [gap=674]Keywords ：Nonlinear Equations，Exact Solutions，Direct Algebr aic Method，Ansatze Method.
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exact solutions in general relativity 广义相对论的精确解
new exact solutions 新精确解
explicit exact solutions 显式精确解
multi-order exact solutions 多级准确解
explicit and exact solutions 显式精确解
By this way, the exact solutions of parabolic lossless nonuniform transmission line can be gained.
用这种等效方法可以求解抛物线型非均匀线的精确解。
By using a mapping method, we obtain exact solutions of the (2 + 1) dimensional long wave equations.
运用数学中的映射方法分析论证，获得了(2 + 1)维长波方程组的精确解。
Its symmetry reduction and exact solutions are obtained through the generalized conditional symmetry approach.
通过广义条件对称方法得到了其对称约化和精确解。
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