The structural performances are evaluated from the condition number (CN) of equilibrium matrix, and CN and minimum eigenvalue of stiffness matrix.

根据平衡矩阵的条件数和刚度矩阵的条件数与最小特征值，评价基本单元的结构特征。

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In this paper an estimation of lower bound of minimum eigenvalue for the integral equation is obtained. Based on this estimation we introduce a new method for the corresponding eigenvalue calculation.

导出了具有正定对称核的积分方程最小特征值的一个下界估计式。以此为基础，获得了相应特征值的一种算法。

youdao

In this paper an estimation of lower bound of minimum eigenvalue for the integral equation is obtained. Based on this estimation we introduce a new method for the corresponding eigenvalue calculation.

导出了具有正定对称核的积分方程最小特征值的一个下界估计式。以此为基础，获得了相应特征值的一种算法。

youdao