... equation principle : 均衡原则 equation of variation : 变异方程；变分方程 technical equation : 技术方程 ...
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变分方程组 system of variational equations ; Variational equation system
标准变分方程 canonical variational equations
一次变分方程 [数] equation of first variation
第一变分方程 [数] equation of first variation
可分离变量的微分方程 Separation Variables ; variable separable differential equation ; Differential Equations with variables separable
分离变数方程 separated equation
分离变数型微分方程 differential equation with separated variables
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在变分方程中，只存在线积分，没有面积分。
最后讨论了利用全变分方程建立有限元的方法。
Finally, based on the total variational equation, the finite element method of these problems is also discussed.
为了获得该椭圆边值问题的解，推导出了有限元求解变分方程。
The corresponding variation equation has also been derived to solve this problem.
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