Decomposing Bayesian networks: Triangulation of the moral graph with genetic algorithms

P. Larrañaga, Cindy Kuijpers, M. Poza, R.H. Murga

Research output: Contribution to journalArticleScientificpeer-review

67 Citations (Scopus)


In this paper we consider the optimal decomposition of Bayesian networks. More concretely, we examine empirically the applicability of genetic algorithms to the problem of the triangulation of moral graphs. This problem constitutes the only difficult step in the evidence propagation algorithm of Lauritzen and Spiegelhalter (1988) and is known to be NP-hard (Wen, 1991). We carry out experiments with distinct crossover and mutation operators and with different population sizes, mutation rates and selection biasses. The results are analysed statistically. They turn out to improve the results obtained with most other known triangulation methods (Kjærulff, 1990) and are comparable to results obtained with simulated annealing (Kjærulff, 1990; Kjærulff, 1992).
Original languageEnglish
Pages (from-to)19-34
JournalStatistics and Computing
Issue number1
Publication statusPublished - Mar 1997
Externally publishedYes


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