Bayesian normalized gaussian network and hierarchical model selection method

Junichiro Yoshimoto, Masa Aki Sato, Shin Ishii

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

This paper presents a vaziational Bayes (VB) method for normalized Gaussian network, which is a mixture model of local experts. Based on the Bayesian framework, we introduce ameta-learning mechanism to optimize the prior distribution and the model structure. In order to search for the optimal model structure efficiently, we also develop a hierazchical model selection method. The performance of our method is evaluated by using function approximation problems and an system identification problem of a nonlinear dynamical system. Experimental results show that our Bayesian framework results in the reduction of generalization error and achieves better function approximation than existing methods within the fmite mixtures of experts family when the number of training data is fairly small.

Original languageEnglish
Pages (from-to)71-94
Number of pages24
JournalIntelligent Automation and Soft Computing
Volume17
Issue number1
DOIs
Publication statusPublished - 01-2011
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Software
  • Theoretical Computer Science
  • Computational Theory and Mathematics
  • Artificial Intelligence

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