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Communication dans un congrès

New local move operators for Bayesian networks structure learning

Abstract : We propose new local move operators incorporated into a score-based stochastic greedy search algorithm to e ciently escape from local optima in the search space of directed acyclic graphs. We extend the classical set of arc addition, arc deletion, and arc reversal operators with a new operator replacing or swapping one parent to another for a given node, i.e. combining two elementary operations (arc addition and arc deletion) in one move. The old and new operators are further extended by doing more operations in a move in order to overcome the acyclicity constraint of Bayesian networks. These extra operations are temporally performed in the space of directed cyclic graphs. At the end acyclicity is restored and newly defined operators actually lead to a gain in graph score. Our experimental results on standard Bayesian networks and challenging gene regulatory networks show large BDeu score and recall value improvements compared to state-of-the-art structure learning algorithms when the sample size is small.
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Communication dans un congrès
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https://hal.inrae.fr/hal-02744796
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Soumis le : mercredi 3 juin 2020 - 07:53:27
Dernière modification le : mercredi 14 octobre 2020 - 03:56:32

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  • HAL Id : hal-02744796, version 1
  • PRODINRA : 259127

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Jimmy Vandel, Brigitte Mangin, Simon de Givry. New local move operators for Bayesian networks structure learning. The Sixth European Workshop on Probabilistic Graphical Models, Sep 2012, Granada, Spain. pp.8. ⟨hal-02744796⟩

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