arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2006.08232stat.APstat.ML
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一阶和全阶Sobol指数的蒙特卡罗估计

Monte Carlo estimators of first-and total-orders Sobol' indices

Ivano Azzini, Thierry Mara, Rossana Rosati

摘要:

本研究比较了两种基于抽样的策略同时估计一阶和全阶方差敏感性指数(又名Sobol指数)的性能。第一种策略是由[8]提出的,是从业者目前采用的方法。第二种方法是本文作者最近才提出的。他们都依赖于不同的估计的一阶和总阶Sobol指数。建立了这两组估计量的渐近正态方差,并从理论和数值上比较了它们的精度。关键词:全局敏感性分析,基于方差的敏感性指标,一阶Sobol指标,全阶Sobol指标,蒙特卡罗估计,渐近正态性

英文摘要:

This study compares the performances of two sampling-based strategies for the simultaneous estimation of the first-and total-orders variance-based sensitivity indices (a.k.a Sobol' indices). The first strategy was introduced by [8] and is the current approach employed by practitioners. The second one was only recently introduced by the authors of the present article. They both rely on different estimators of first-and total-orders Sobol' indices. The asymp-totic normal variances of the two sets of estimators are established and their accuracies are compared theoretically and numerically. The results show that the new strategy outperforms the current one.Keywords: global sensitivity analysis, variance-based sensitivity indices, first-order Sobol' index, total-order Sobol' index, Monte Carlo estimate, asymptotic normality

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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