An approximate formula using the lower and upper bound of the first simple bounds for estimate of the failure probability of structural systems is presented in the paper.
提出用一阶简单边界的上、下界来估计结构系统失效概率的近似公式。
A upper bound with consistent matrix norm and the estimate for error of AOR iterative method for solving linear equation system, which based on the doubly diagonal dominance, are presented.
在双严格占优矩阵条件下，给出了相容矩阵范数的一个上界，并以此为基础，得到了线性方程组求解时的AOR迭代法的误差估计式。
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