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Evolving space-filling curves to distribute radial basis functions over an input space

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2 Author(s)
B. A. Whitehead ; Univ. of Tennessee Space Inst., Tullahoma, TN, USA ; T. D. Choate

An evolutionary neural network training algorithm is proposed for radial basis function (RBF) networks. The locations of basis function centers are not directly encoded in a genetic string, but are governed by space-filling curves whose parameters evolve genetically. This encoding causes each group of codetermined basis functions to evolve to fit a region of the input space. A network produced from this encoding is evaluated by training its output connections only. Networks produced by this evolutionary algorithm appear to have better generalization performance on the Mackey-Glass time series than corresponding networks whose centers are determined by k-means clustering

Published in:

IEEE Transactions on Neural Networks  (Volume:5 ,  Issue: 1 )