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

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

Abstract

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 analyze 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.

Suggested Citation

  • Gustavo Z dos Santos Lima & João V T de Lima & João M de Araújo & Gilberto Corso & Sérgio Luiz E F da Silva, 2023. "Generalized statistics: Applications to data inverse problems with outlier-resistance," PLOS ONE, Public Library of Science, vol. 18(3), pages 1-22, March.
    • Handle: RePEc:plo:pone00:0282578
    DOI: 10.1371/journal.pone.0282578
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    References listed on IDEAS

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    3. Sérgio Luiz E. F. Silva & Gilberto Corso, 2021. "Nonextensive Gutenberg–Richter law and the connection between earthquakes and marsquakes," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 94(1), pages 1-5, January.
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