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arXiv 2201.12173stat.MEcond-mat.stat-mechmath.STphysics.comp-phphysics.geo-phstat.TH
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广义统计在抗异常值数据反问题中的应用

Generalized statistics: applications to data inverse problems with outlier-resistance

João V. T. de Lima, Sérgio Luiz E. F. da Silva, João M. de Araújo, Gilberto Corso, Gustavo Z. dos Santos Lima

摘要:

数据驱动反演框架的传统方法是基于高斯统计的,这带来了严重的困难,特别是在测量中存在异常值的情况下。在这项工作中,我们提出了极大似然估计与广义高斯分布的背景下,Rényi,Tsallis和Kaniadakis统计。在这方面,我们通过所谓的影响函数分析了每个提案的异常阻力。通过这种方式,我们通过构造与极大似然估计相关联的目标函数来制定逆问题。为了证明广义方法的鲁棒性,我们考虑了一个重要的地球物理逆问题,高噪声数据与尖峰。结果表明,最好的数据反演性能发生时,熵指数从每个广义统计量与目标函数成正比的误差幅度的倒数。我们认为,在这样的限制,这三种方法是抵抗离群值,也是等效的,这表明了较低的计算成本的反演过程中,由于要执行的数值模拟的减少和快速收敛的优化过程。

英文摘要:

The conventional approach to data-driven inversion framework is based on Gaussian statistics that presents serious difficulties, especially in the presence of outliers in the measurements. In this work, we present maximum likelihood estimators associated with generalized Gaussian distributions in the context of Rényi, Tsallis and Kaniadakis statistics. In this regard, we analytically analyse the outlier-resistance of each proposal through the so-called influence function. In this way, we formulate inverse problems by constructing objective functions linked to the maximum likelihood estimators. To demonstrate the robustness of the generalized methodologies, we consider an important geophysical inverse problem with high noisy data with spikes. The results reveal that the best data inversion performance occurs when the entropic index from each generalized statistic is associated with objective functions proportional to the inverse of the error amplitude. We argue that in such a limit the three approaches are resistant to outliers and are also equivalent, which suggests a lower computational cost for the inversion process due to the reduction of numerical simulations to be performed and the fast convergence of the optimization process.

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