基本解释：负向量,负矢量
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The alternative algorithm based upon negative gradient vector is proposed in the paper for calculating the structural reliability index, and which has eliminated the shortcoming of the first order second moment method, and has been effective in nonlinear performance function.提出了一种计算结构可靠性指标的负梯度矢量迭代方法，这种方法克服了一次二阶矩方法的缺点，对于非线性功能函数非常有效，数值例题表明：这种方法具有很好的收敛性和高的计算精度。
Then a new load index scheme-the total process remaining time is proposed.本文总结和比较了当前使用的三类负载向量并分析了它们的优点与不足,提出了一种新的负载评价指标一进程剩余运行时间总和。
The concept of a new- style and high- precision fault component,synthetic negative sequence vector SNSV is proposed in the paper.文中提出一种新型的、高精度的故障分量——综合负序矢量的概念 ,并给出综合三相负序分量的实时算法。
