Structurally adaptive modular networks for nonstationary environments

Authors:
V. Ramamurti;J. Ghosh
Affiliations:
Dept. of Electr. & Comput. Eng., Texas Univ., Austin, TX;-
Venue:
IEEE Transactions on Neural Networks
Year:
1999

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Abstract

Introduces a neural network capable of dynamically adapting its architecture to realize time variant nonlinear input-output maps. This network has its roots in the mixture of experts framework but uses a localized model for the gating network. Modules or experts are grown or pruned depending on the complexity of the modeling problem. The structural adaptation procedure addresses the model selection problem and typically leads to much better parameter estimation. Batch mode learning equations are extended to obtain online update rules enabling the network to model time varying environments. Simulation results are presented throughout the paper to support the proposed techniques