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A proximal-point outer approximation algorithm

Author

Listed:
  • Massimo De Mauri

    (KU Leuven and Flanders Make - DMMS_M)

  • Joris Gillis

    (KU Leuven and Flanders Make - DMMS_M)

  • Jan Swevers

    (KU Leuven and Flanders Make - DMMS_M)

  • Goele Pipeleers

    (KU Leuven and Flanders Make - DMMS_M)

Abstract

Many engineering and scientific applications, e.g. resource allocation, control of hybrid systems, scheduling, etc., require the solution of mixed-integer non-linear problems (MINLPs). Problems of such class combine the high computational burden arising from considering discrete variables with the complexity of non-linear functions. As a consequence, the development of algorithms able to efficiently solve medium-large MINLPs is still an interesting field of research. In the last decades, several approaches to tackle MINLPs have been developed. Some of such approaches, usually defined as exact methods, aim at finding a globally optimal solution for a given MINLP at expense of a long execution time, while others, generally defined as heuristics, aim at discovering suboptimal feasible solutions in the shortest time possible. Among the various proposed paradigms, outer approximation (OA) and feasibility pump (FP), respectively as exact method and as heuristic, deserve a special mention for the number of relevant publications and successful implementations related to them. In this paper we present a new exact method for convex mixed-integer non-linear programming called proximal outer approximation (POA). POA blends the fundamental ideas behind FP into the general OA scheme that attepts to yield faster and more robust convergence with respect to OA while retaining the good performances in terms of fast generation of feasible solutions of FP.

Suggested Citation

  • Massimo De Mauri & Joris Gillis & Jan Swevers & Goele Pipeleers, 2020. "A proximal-point outer approximation algorithm," Computational Optimization and Applications, Springer, vol. 77(3), pages 755-777, December.
    • Handle: RePEc:spr:coopap:v:77:y:2020:i:3:d:10.1007_s10589-020-00216-9
    DOI: 10.1007/s10589-020-00216-9
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    References listed on IDEAS

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    1. Marianna De Santis & Stefano Lucidi & Francesco Rinaldi, 2013. "A new class of functions for measuring solution integrality in the Feasibility Pump approach: Complete Results," DIAG Technical Reports 2013-05, Department of Computer, Control and Management Engineering, Universita' degli Studi di Roma "La Sapienza".
    2. Hassan Hijazi & Pierre Bonami & Adam Ouorou, 2014. "An Outer-Inner Approximation for Separable Mixed-Integer Nonlinear Programs," INFORMS Journal on Computing, INFORMS, vol. 26(1), pages 31-44, February.
    3. Shaurya Sharma & Brage Knudsen & Bjarne Grimstad, 2016. "Towards an objective feasibility pump for convex MINLPs," Computational Optimization and Applications, Springer, vol. 63(3), pages 737-753, April.
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