Function Estimation by Feedforward Sigmoidal Networks with BoundedWeights

  • Authors:
  • Nageswara S. V. Rao;Vladimir Protopopescu

  • Affiliations:
  • Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831–6364.;Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831–6364.

  • Venue:
  • Neural Processing Letters
  • Year:
  • 1998

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Abstract

We address the problem of estimating a function f: [0,1] ^d↦ [-L,L] by using feedforward sigmoidal networks with a single hiddenlayer and bounded weights. The only information about the function isprovided by an identically independently distributed sample generatedaccording to an unknown distribution. The quality of the estimate isquantified by the expected cost functional and depends on the sample size.We use Lipschitz properties of the cost functional and of the neuralnetworks to derive the relationship between performance bounds and samplesizes within the framework of Valiant‘s probably approximately correctlearning.