By use of the variational method, the potential energy principle of a elastic system on a variable domain is discussed.
并用该变分法讨论了具有可变区域的弹性系统的势能原理。
By making use of heat balance of finite elements in variable domain, a differential equation of control has been derived.
利用有限元的受热平衡，推导出可变域中发汗控制微分方程序。
Using the variable domain finite element method, the problem of the flow over a gated or free spillway has been solved successfully.
本文利用变区域上变分有限元方法求解了溢流坝自由溢流和闸下出流问题。
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