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An approach to identify solutions of interest from multi and many-objective optimization problems

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Abstract

The result of a multiobjective or a many-objective optimization problem is a large set of non-dominated solutions. Once the Pareto Front (or a good approximation of it) has been found, then providing the decision maker with a smaller set of “interesting solutions” is a key step. Here, the focus is on how to select such a set of solutions of interest which, in contrast to previous approaches that relied on geometrical features, is carried out considering the decision maker’s preferences. The proposed a posteriori approach consists in assigning an interval of potential scores to every solution, where such scores depend on the decision maker’s preferences. The solutions are then compared and filtered according to their corresponding intervals, using a recently proposed possibility degree formula. Three examples, with two, three and many objectives are used to show the benefits of the proposal.

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Notes

  1. For certain attitude functions like \(f(x)=1/x\) the intervals must be defined in \(R^+\).

  2. The benchmark provided in the Competition on Many-Objective Optimization at the 2018 IEEE Congress on Evolutionary Computation, included functions with 5, 10 and 15 objectives https://www.cs.bham.ac.uk/~chengr/CEC_Comp_on_MaOO/2018/webpage.html.

  3. In the special case where this interval is not unique, the reference interval is the one that also has the greatest upper bound.

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Acknowledgements

D. A. Pelta and M. T. Lamata acknowledge support through Project TIN2017-86647-P from the Spanish Ministry of Economy and Competitiveness (including European Regional Development Funds). M. Torres enjoys a Ph.D. research training staff grant associated with the Project TIN2014-55024-P from the Spanish Ministry of Economy and Competitiveness and co-funded by the European Social Fund. R. Yager acknowledges the support of the United States Office of Naval Research (ONR).

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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by MT and DAP. All authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to David A. Pelta.

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Torres, M., Pelta, D.A., Lamata, M.T. et al. An approach to identify solutions of interest from multi and many-objective optimization problems. Neural Comput & Applic 33, 2471–2481 (2021). https://doi.org/10.1007/s00521-020-05140-x

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