Workshop on Advanced Methodologies for Bayesian Networks

Advanced Methodologies for Bayesian Networks pp 105-121 | Cite as

Empirical Behavior of Bayesian Network Structure Learning Algorithms

Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 9505)

Abstract

Bayesian network structure learning (BNSL) is the problem of finding a BN structure which best explains a dataset. Score-based learning assigns a score to each network structure. The goal is to find the structure which optimizes the score. We review two recent studies of empirical behavior of BNSL algorithms.

The score typically reflects fit to a training dataset; however, models which fit training data well may generalize poorly. Thus, it is not clear that finding an optimal network is worthwhile. We review a comparison of exact and approximate search techniques. Sometimes, approximate algorithms suffice; for complex datasets, the optimal algorithms produce better networks.

BNSL is known to be NP-hard, so exact solvers prune the search space using heuristics. We next review problem-dependent characteristics which affect their efficacy. Empirical results show that machine learning techniques based on these characteristics can often be used to accurately predict the algorithms’ running times.

Keywords

Bayesian networks Structure learning Algorithm selection Empirical hardness 

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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  1. 1.Max Planck Institute for the Biology of AgeingCologneGermany

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