建立了七次多项式动力凸轮型线的优化设计数学模型；
The mathematical model of optimizing design for hepta polynomial dynamic cam was established.
为了得到通用的优化模型，对动压轴承型线数学表达式的本质特点进行了研究。
In order to obtain a general optimization model, study on substantial characteristics of the mathematical expression of hydrodynamic bearings profiles was brought forward.
传输线可以看作集中参数二端口网络的级联，其数学模型—电报方程是一阶双曲型偏微分方程组。
Telegraph equations, can be looked as cascade connection of two-port network of lumped circuit of transmission line, is a hyperbolic partial differential equations.
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