one-order hyperbolic scalar wave equation 一阶双曲型标量波动方程
Starting from one-order wave equation, we derived boundary conditions under ragged surface.
从以速度-应力表示的一阶波动方程出发，导出了起伏边界情况下的边界条件。
A condition of a one-order quasilinear partial differential equation of a traffic model forming unique shock wave is given end proved.
本文讨论了一交通模型的一阶拟线性偏微分方程激波产生唯一性的条件并给了严格的证明。
Using two-flow model, small perturbation theory and solvable conditions of one-order linear equations, a dispersion equation of pressure wave in horizontal air-liquid bubbly flow was proposed.
利用两流体模型、小扰动原理和线性一阶齐次方程组有解的条件，得到了气液泡状流型下的压力波色散方程。
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