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Random sampling and machine learning to understand good decompositions

  • S. Basso
  • A. CeselliEmail author
  • A. Tettamanzi
S.I.: Decomposition Methods for Hard Optimization Problems

Abstract

Motivated by its implications in the development of general purpose solvers for decomposable Mixed Integer Programs (MIPs), we address a fundamental research question, that is how to exploit data-driven techniques to obtain automatic decomposition methods. We preliminary investigate the link between static properties of MIP input instances and good decomposition patterns. We devise a random sampling algorithm, considering a set of generic MIP base instances, and generate a large, balanced and well diversified set of decomposition patterns, that we analyze with machine learning tools. We also propose and test a minimal proof of concept framework performing data-driven automatic decomposition. The use of supervised techniques highlights interesting structures of random decompositions, as well as proving (under certain conditions) that data-driven methods are fruitful in our context, triggering at the same time perspectives for future research.

Keywords

Dantzig–Wolfe decomposition Machine learning Random sampling 

Notes

Acknowledgements

The authors wish to thank the guest editors and three anonymous reviewers: their insightful comments allowed to substantially improve the manuscript.

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Copyright information

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Authors and Affiliations

  1. 1.Dipartimento di InformaticaUniversità degli Studi di MilanoCremaItaly
  2. 2.CNRS, I3SUniversité Côte d’Azur - INRIASophia Antipolis CEDEXFrance

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