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arXiv 1606.00770math.NAcs.NAstat.OT
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不同主效应全局灵敏度指数的数值估计方法

Different numerical estimators for main effect global sensitivity indices

Imperial College London(帝国理工学院)

Sergei Kucherenko, Shufang Song

AI总结:

本文比较了四种直接公式在具有解析解的测试问题上的表现,发现双重循环重排方法在独立和依赖变量模型中均表现最佳。

摘要:

基于Sobol灵敏度指数的方差方法因易于解释而广受欢迎。然而,对于复杂问题计算Sobol指数通常需要大量函数评估以达到合理收敛。本文比较了四种直接公式在具有解析解的测试问题上的表现,这些公式基于高维积分,使用MC和QMC技术进行评估。此外,还比较了基于所谓双重循环重排公式的不同方法。发现双重循环重排(DLR)方法在独立和依赖变量模型中均表现最佳。

英文摘要:

The variance-based method of global sensitivity indices based on Sobol sensitivity indices became very popular among practitioners due to its easiness of interpretation. For complex practical problems computation of Sobol indices generally requires a large number of function evaluations to achieve reasonable convergence. Four different direct formulas for computing Sobol main effect sensitivity indices are compared on a set of test problems for which there are analytical results. These formulas are based on high-dimensional integrals which are evaluated using MC and QMC techniques. Direct formulas are also compared with a different approach based on the so-called double loop reordering formula. It is found that the double loop reordering (DLR) approach shows a superior performance among all methods both for models with independent and dependent variables.

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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