A simplified treatment for the nonlinearity of the system equations is given.
给出了系统方程非线性的一种简便处理方法。
The model is a free boundary problem for a system of partial differential equations.
该模型是一个偏微分方程系统的自由边界问题。
The method is simple for computation, and it only needs to solve some equations.
该方法优点是计算简单，只需要解一些二次方程组。
Finally, a group of equations for calculating the thickness of the frozen wall is given.
最后本文给出了计算冻结壁厚度的方程组。
The general form of constitutive equations for the mixture motion is derived.
给出了混合流体本构方程的一般形式。
Fundamental equations for the analysis of plane flow of elastic-viscous fluid are established.
本文建立了分析粘弹流体平面流的基本方程，并采用摄动法和加权余量法。
The equations with a nice form and clear arrangement are effective for programming.
所得到的方程形式优美，结构清晰，便于计算机编程。
For the last two ways, we use equations to solve the word problem.
后两种方法实际就是列方程解应用题。
For the last two ways, we use equations to solve the word problem.
后两种方法实际就是列方程解应用题。
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