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Integer Linear Programming for the Bayesian network structure learning problem
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DOI：10.1016/j.artint.2015.03.003.png)
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Abstract
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Bayesian networks are a commonly used method of representing conditional probability relationships between a set of variables in the form of a directed acyclic graph (DAG). Determination of the DAG which best explains observed data is an NP-hard problem [1]. This problem can be stated as a constrained optimisation problem using Integer Linear Programming (ILP). This paper explores how the performance of ILP-based Bayesian network learning can be improved through ILP techniques and in particular through the addition of non-essential, implied constraints. There are exponentially many such constraints that can be added to the problem. This paper explores how these constraints may best be generated and added as needed. The results show that using these constraints in the best discovered configuration can lead to a significant improvement in performance and show significant improvement in speed using a state-of-the-art Bayesian network structure learner. (C) 2015 Elsevier B.V. All rights reserved.
Keywords:
Bayesian networks
Integer Linear Programming
Constrained optimisation
Cutting planes
Separation
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