Variation calculus has been widely used in mathematical physics.
变分法在数学物理问题中有着广泛的应用。
Calculation of resonant frequencies of sloshing in a container have been achieved by FEM with calculus of variation, which is able to solve sloshing in variety complex containers.
提出了用变分有限元方法计算容器内液体晃动谐振频率的方法和步骤，这种方法可适用于各种形状复杂的容器内液体晃动问题。
The calculating formulas of top and bottom pool-surface deformation in TIG full-penetration weld pool is developed based on principles of fluid mechanics and variation calculus.
根据流体力学理论和变分法原理，推导出了熔透情况下TIG焊接熔池上表面和下表面变形的方程。
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