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Related Experiment Videos

Using function approximation to analyze the sensitivity of MLP with antisymmetric squashing activation function.

D S Yeung1, Xuequan Sun

  • 1Dept. of Comput., Hong Kong Univ.

IEEE Transactions on Neural Networks
|February 5, 2008
PubMed
Summary

This study introduces a generalized method for analyzing neural network sensitivity before design. It offers insights into network parameters, aiding in structure determination and weight range estimation for training.

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Area of Science:

  • Artificial Intelligence
  • Computational Neuroscience
  • Machine Learning

Background:

  • Neural network sensitivity analysis is typically performed post-design and training.
  • Existing methods, like Piche's, have limitations on input and weight perturbations.

Purpose of the Study:

  • To generalize Piche's statistical method for multilayer perceptron (MLP) sensitivity analysis.
  • To derive a universal expression for MLP sensitivity applicable to antisymmetric squashing activation functions.
  • To provide a method for network design decisions based on sensitivity analysis.

Main Methods:

  • Derivation of a universal MLP sensitivity expression for antisymmetric squashing activation functions.
  • Removal of restrictions on input and output perturbations.
  • Experimental validation using a three-layer MLP with 30 nodes per layer.

Main Results:

  • Theoretical investigations closely align with experimental results.
  • Analysis reveals the impact of network design parameters (layers, neurons, activation function).
  • A novel network design method is proposed.

Conclusions:

  • The generalized sensitivity analysis offers a critical approach to neural network design.
  • The method aids in determining optimal network structure and permissible weight ranges for training.
  • Findings provide valuable guidance for making informed network design decisions.