Transactions of the Society of Instrument and Control Engineers
Online ISSN : 1883-8189
Print ISSN : 0453-4654
ISSN-L : 0453-4654
Normalized Gaussian Network Based on Variational Bayes Inference and Hierarchical Model Selection
Junichiro YOSHIMOTOShin ISHIIMasa-aki SATO
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2003 Volume 39 Issue 5 Pages 503-512


This paper presents a model selection method for normalized Gaussian network (NGnet). We introduce a hierarchical prior distribution of the model parameters and the NGnet is trained based on the variational Bayes (VB) inference. The free energy calculated in the VB inference is used as a criterion for the model selection. In order to efficiently search for the optimal model structure, we develop a hierarchical model selection method. The performance of our method is evaluated by using function approximation and nonlinear dynamical system identification problems. Our method achieved better performance than existing methods.

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