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1·Using calculus of variationS, necessary conditions of the optimization problem are developed.

使用变分法，推导出这种最佳化问题的必要条件。

2·The main methods are calculus of variations, finite element method and boundary element method.

实践证明复变函数方法是研究接触力学的行之有效的方法。

3·This paper investigates several equiyalent propositions of minimal curve surface by means of the euler equation of calculus of variations .

本文通过变分法欧拉方程推导出极小曲面的几个等价命题。

4·After dispersing, the calculus of variations equation turn to FEM equation group and solve the equation group to gain the electromagnetic value.

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。

5·The necessary conditions of the OCP for polymer flooding were deduced by using calculus of variations. Both continuous and discrete cases are studied.

利用变分法推导了连续与离散情形聚合物驱最优控制问题的必要条件。