Abstract : We present in this article new strategies for selecting nodes in interval Branch and Bound algorithms for constrained global optimization. For a minimization problem the standard best-first strategy selects a node with the smallest lower bound of the objective function estimate. We first propose new node selection policies where an upper bound of each node/box is also taken into account. The good accuracy of this upper bound achieved by several contracting operators leads to a good performance of the node selection rule based on this criterion. We propose another strategy that also makes a trade-off between diversification and intensification by greedily diving into potential feasible regions at each node of the best-first search. These new strategies obtain better experimental results than classical best-first search on difficult constrained global optimization instances.
https://hal-enpc.archives-ouvertes.fr/hal-01230893
Contributeur : Bertrand Neveu
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Soumis le : jeudi 19 novembre 2015 - 11:13:50
Dernière modification le : lundi 16 juillet 2018 - 15:42:03
Document(s) archivé(s) le : vendredi 28 avril 2017 - 21:25:56
