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Starting from the variation principle of elasticity theory, the finite element method (FEM) theory is introduced simply.
从弹性力学的变分法原理出发，简单介绍了有限单元法。
参考来源 - 基于中厚板理论的桩筏基础研究·2,447,543篇论文数据，部分数据来源于NoteExpress
从弹性力学的变分法原理出发，简单介绍了有限单元法。
Starting from the variation principle of elasticity theory, the finite element method (FEM) theory is introduced simply.
利用拉格朗日变分法原理，分析了非对称非线性定向耦合器的开关特性。
We use the Lagrange variational approach to study the switching characteristics of asymmetric nonlinear directional couplers.
利用螺旋的升力线模型和变分法原理对螺旋桨叶片环量分布进行了数值优化。
The optimum distribution of circulation on a marine propeller blade is numerically determined by using the lift_line vortex model and variational calculus.
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