Reaction energy was always estimated by Group additivity method and density functional theory.
反应能量主要采用原子团加和方法以及密度泛函理论进行估算。
The energy functional is then written and the plate is discretized into the finite element method format on a small computer for performing the calculation.
再利用板的微分方程建立加筋板的能量泛函，并由此离散成在小机上就能计算的有限元格式。
Based on the method of small parameters perturbation of 2nd order, the stochastic functional of potential energy for structures with stochastic stiffness under stochastic stimulus is derived.
利用小参数摄动法，建立了随机结构在随机激励下的二阶摄动随机势能泛函。
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