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arXiv 1202.0943math.STstat.TH
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基于导数的全球敏感性测量:与Sobol指数和数值检验的一般联系

Derivative-based global sensitivity measures: general links with Sobol' indices and numerical tests

Matieyendou Lamboni, Bertrand Iooss, Anne-Laure Popelin, Fabrice Gamboa

摘要:

数值模型的输入变量的基于方差的重要性度量(称为Sobol指数)的估计可能需要大量的模型评估。这对于涉及大量输入变量(通常超过十个)的高维模型是不可接受的。最近,Sobol和Kucherenko提出了基于导数的全局灵敏度度量(DGSM),定义为模型输出的平方导数的积分,表明它可以帮助解决某些情况下的维数问题。对于属于Boltzmann概率测度类的输入变量,我们给出了DGSM和总Sobol'指数之间的一般不等式联系,从而推广了Sobol和Kucherenko关于均匀和正规测度的已有结果.还描述了对数凹测度的特殊情况。这个链接提供了一个基于DGSM的总Sobol指数的最大界。数值试验表明了该界的性能及其在实际中的实用性。

英文摘要:

The estimation of variance-based importance measures (called Sobol' indices) of the input variables of a numerical model can require a large number of model evaluations. It turns to be unacceptable for high-dimensional model involving a large number of input variables (typically more than ten). Recently, Sobol and Kucherenko have proposed the Derivative-based Global Sensitivity Measures (DGSM), defined as the integral of the squared derivatives of the model output, showing that it can help to solve the problem of dimensionality in some cases. We provide a general inequality link between DGSM and total Sobol' indices for input variables belonging to the class of Boltzmann probability measures, thus extending the previous results of Sobol and Kucherenko for uniform and normal measures. The special case of log-concave measures is also described. This link provides a DGSM-based maximal bound for the total Sobol indices. Numerical tests show the performance of the bound and its usefulness in practice.

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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