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。
A new method to solve over-determined geodetic boundary value problem is proposed with the help of minimizing some kinds of functional in variation calculus.
本文借助于变分法中求泛函极小化的方法提出求解超定大地边值问题的新方法。
The differential equation for the vibration of the riser system is derived by means of functional calculus of variation.
采用泛函变分法导出了隔水管的振动微分方程。
The differential equation for the vibration of the riser system is derived by means of functional calculus of variation.
采用泛函变分法导出了隔水管的振动微分方程。
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