该方程组涵盖了变分问题的各种欧拉方程。
The complete Euler equation set contains all kinds of Euler equations of the variational problems.
利用变分原理得到平衡微分方程组和相应的边界条件。
By variational principle we obtain a system of differential equations and corresponding boundary conditions.
讨论了用隐式完全守恒差分格式求解流体力学方程组，用变分原理求解热传导方程等特点。
Features of solving the hydrodynamic equations by the fully conservative implicit difference scheme and solving the thermal conductive equations by the variational method are discussed.
在一般双共轭梯度法的基础上，本文利用广义变分原理对内积进行了重新定义，使双共轭梯度法求解复线性方程组更为有效。
Based on biconjugate gradient method, we redefine inner products using general variation principle, which can make complex linear equations solving have high-performance.
离散后变分方程化为有限元方程组，求解可得口径场的电磁场值。
After dispersing, the calculus of variations equation turn to FEM equation group and solve the equation group to gain the electromagnetic value.
通过变分求解，最后只需要求解两个变量耦合的方程组；
Then the problems consist in solving a system with two coupled equations.
通过变分求解，最后只需要求解两个变量耦合的方程组；
Then the problems consist in solving a system with two coupled equations.
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