Comparison on Gradient-Based Neural Dynamics and Zhang Neural Dynamics for Online Solution of Nonlinear Equations

  • Authors:
  • Yunong Zhang;Chenfu Yi;Weimu Ma

  • Affiliations:
  • School of Information Science and Technology, Sun Yat-Sen University, Guangzhou, China 510275;School of Information Science and Technology, Sun Yat-Sen University, Guangzhou, China 510275;School of Information Science and Technology, Sun Yat-Sen University, Guangzhou, China 510275

  • Venue:
  • ISICA '08 Proceedings of the 3rd International Symposium on Advances in Computation and Intelligence
  • Year:
  • 2008

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Abstract

For online solution of nonlinear equation f (x ) = 0, this paper generalizes a special kind of recurrent neural dynamics by using a recent design method proposed by Zhang et al . Different from gradient-based dynamics (GD), the resultant Zhang dynamics (ZD) is designed based on the elimination of an indefinite error-monitoring function (instead of the elimination of a square-based positive error-function usually associated with GD). For comparative purposes, the gradient-based dynamics is also developed and exploited for solving online such a nonlinear equation f (x ) = 0. Computer-simulation results via power-sigmoid activation functions substantiate further the theoretical analysis and efficacy of Zhang neural dynamics on nonlinear equations solving.