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arXiv 1801.04095math.STmath.PRstat.TH
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独立变量组的敏感性指数

Sensitivity indices for independent groups of variables

Baptiste Broto, François Bachoc, Marine Depecker, Jean-Marc Martinez

摘要:

在本文中,我们研究了独立变量组的敏感性指标,并研究了块加性模型的特殊情况。我们表明,在这种情况下,大多数的Sobol指数等于零,Shapley效应可以更有效地估计。然后,我们将这项研究应用到高斯线性模型,我们提供了一个有效的算法来计算理论的敏感性指标。在数值实验中,我们表明,该算法相比其他现有的方法。我们也使用的理论结果,以改善一般模型的Shapley效应的估计,当输入形成独立的变量组。

英文摘要:

In this paper, we study sensitivity indices for independent groups of variables and we look at the particular case of block-additive models. We show in this case that most of the Sobol indices are equal to zero and that Shapley effects can be estimated more efficiently. We then apply this study to Gaussian linear models, and we provide an efficient algorithm to compute the theoretical sensitivity indices. In numerical experiments, we show that this algorithm compares favourably to other existing methods. We also use the theoretical results to improve the estimation of the Shapley effects for general models, when the inputs form independent groups of 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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