reduced matrix element

Based on the V-partition coupling coefficients from a group to its subgroup, a general relationship between the reduced matrix element of irreducible tensor operator of a group and that of its subgroup is obtained.

本文运用唐敖庆等引入的群到子群V系数，首先导出了群的不可约张量算子约化矩阵元与其子群的不可约张量算子约化矩阵元间的简单关系式。

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The singularity of thick and thin plate element stiffness matrix due to the use of the reduced integration on the basis of the finite element is investigated.

本文研究了薄厚板壳有限单元统一性理论中，由于采用降阶积分而使得刚度矩阵产生奇异的问题。

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