排序方式: 共有6条查询结果,搜索用时 31 毫秒
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从系统初始运行点出发,以雅可比矩阵最小奇异值对应的左奇异向量为初始负荷增长方向,用改进连续潮流法搜索电压崩溃点,再以该崩溃点雅可比矩阵零奇异值对应的左奇异向量作为新的负荷增长方向重新计算,直到负荷增长方向与崩溃点处崩溃点曲面的法线方向重合为止,从而得出了一种最危险的负荷增长方式和最小负荷功率裕度的快速求解方法,IEEE14节点系统实例计算验证了该方法的可行性. 相似文献
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余晗 《厦门理工学院学报》1999,(1)
本文主要讨论S-估计,这种S-估计具有偏度稳健性,且能达到误差敏感度下界,因而提供了尽量减小异常值影响的可能性。最后在给定误差敏感度γ~*和溃崩点α下,寻找出最优统计判决法则。 相似文献
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检验的样本崩溃点是样本中能逆转当前判决的离群值的最小比例。本文给出了总体方差矩估计检验的样 本崩溃点,并分析了该样本崩溃点的渐近正态性。 相似文献
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Ting WANG Yong LI Hengjian CUI 《系统科学与复杂性》2007,20(1):47-65
A class of robust location estimators called weighted randomly trimmed means are introduced and not only their consistency and asymptotic normality are proved, but their influence functions, asymptotic variances and breakdown points are also derived. They possess the same breakdown points as the median, and some of them own higher asymptotic relative efficiencies at the heavy-tailed distributions than some other well-known location estimators; whereas the trimmed means, Winsorized means and Huber's M-estimator possess higher asymptotic relative efficiencies at the light-tailed distributions, in which Huber's M-estimator is the most robust. 相似文献
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