主要考虑非线性波方程组的一些简单对称及其构成的李代数，并利用所得对称给出该方程组的一些单参数变换群。
In this paper, the symmetries and Lie algebra of a coupled nonlinear wave equation were discussed. One-parameter transformation groups of this equation were obtained by using the symmetries.
伍时桂和李兆治所建设的非线性波传播方程组是做了某些数学简化和变换。
This paper deals with methods of numerical solutions for problems of nonlinear wave propagations in arteries.
首先建立了一种基于李雅普·诺夫变换的SINS等价误差模型。
An equivalent error model of SINS was established by Lyapunov transform.
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