...
首页> 外文期刊>Computer physics communications >A fast computational method for moment-independent uncertainty importance measure
【24h】

A fast computational method for moment-independent uncertainty importance measure

机译:独立于矩的不确定性重要性测度的快速计算方法

获取原文
获取原文并翻译 | 示例
           

摘要

This work focuses on the fast computation of the moment-independent importance measure ~(δi). We first analyse why ~(δi) is associated with a possible computational complexity problem. One of the reasons that we thought of is the use of two-loop Monte Carlo simulation, because its rate of convergence is O(N-~(1/4)), and another one is the computation of the norm of the difference between a density and a conditional density. We find that these problems are nonessential difficulties and try to give associated improvements. A kernel estimate is introduced to avoid the use of two-loop Monte Carlo simulation, and a moment expansion of the associated norm which is not simply obtained by using the Edgeworth series is proposed to avoid the density estimation. Then, a fast computational method is introduced for ~(δi). In our method, all ~(δi) can be obtained by using a single sample set. From the comparison of the numerical error analyses, we believe that the proposed method is clearly helpful for improving computational efficiency.
机译:这项工作着重于与矩无关的重要度量〜(δi)的快速计算。我们首先分析为什么〜(δi)与可能的计算复杂性问题相关联。我们想到的原因之一是使用二环蒙特卡洛模拟,因为其收敛速度为O(N-〜(1/4)),另一个原因是计算之间的差范数密度和条件密度。我们发现这些问题不是不必要的困难,并尝试给出相关的改进。引入核估计以避免使用两环蒙特卡罗模拟,并提出了使用Edgeworth级数不能简单获得的相关范数的矩展开,以避免密度估计。然后,针对〜(δi)引入了一种快速计算方法。在我们的方法中,所有〜(δi)可以通过使用单个样本集获得。通过对数值误差分析的比较,我们认为所提出的方法显然有助于提高计算效率。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号