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Tukey’s Biweight Loss Function for Fuzzy Set-Valued M-estimators of Location

  • Beatriz SinovaEmail author
  • Stefan Van Aelst
Conference paper
Part of the Advances in Intelligent Systems and Computing book series (AISC, volume 456)

Abstract

The Aumann-type mean is probably the best-known measure for the location of a random fuzzy set. Despite its numerous probabilistic and statistical properties, it inherits from the mean of a real-valued random variable the high sensitivity to outliers or data changes. Several alternatives extending the concept of median to the fuzzy setting have already been proposed in the literature. Recently, the adaptation of location M-estimators has also been tackled. The expression of fuzzy-valued location M-estimators as weighted means under mild conditions allows us to guarantee that these measures take values in the space of fuzzy sets. It has already been shown that these conditions hold for the Huber and Hampel families of loss functions. In this paper, the strong consistency and the maximum finite sample breakdown point when the Tukey biweight (or bisquare) loss function is chosen are analyzed. Finally, a real-life example will illustrate the influence of the choice of the loss function on the outputs.

Keywords

Random fuzzy set Robustness Location M-estimator Bisquare loss function Biweight loss function 

Notes

Acknowledgments

This research has been partially supported by the Spanish Ministry of Economy and Competitiveness through the Grant MTM2013-44212-P, the Principality of Asturias/FEDER Grant GRUPIN14-101, Grant C16/15/068 of International Funds KU Leuven and IAP research network grant nr. P7/06 of the Belgian government. Their support is gratefully acknowledged.

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Copyright information

© Springer International Publishing Switzerland 2017

Authors and Affiliations

  1. 1.Departamento de Estadística e I.O. y D.M.Universidad de OviedoOviedoSpain
  2. 2.Department of MathematicsKU LeuvenLeuvenBelgium
  3. 3.Department of Applied Mathematics, Computer Science and StatisticsGhent UniversityGentBelgium

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