Improved Zhang neural network model and its solution of time-varying generalized linear matrix equations

Authors:
Zhan Li;Yunong Zhang
Affiliations:
School of Information Science and Technology, Sun Yat-sen University, Guangzhou 510006, PR China;School of Information Science and Technology, Sun Yat-sen University, Guangzhou 510006, PR China
Venue:
Expert Systems with Applications: An International Journal
Year:
2010

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Abstract

In this paper, a class of Zhang neural networks (ZNNs) are developed and analyzed on convergence properties. Different from conventional gradient-based neural networks (GNNs), such ZNN is designed based on the idea of measuring the time-derivation information of time-varying coefficients. The general framework of such a ZNN, together with its variant forms, is presented and investigated. The resultant ZNN model activated by linear functions possesses global exponential convergence to the time-varying equilibrium point. By employing proposed new smooth nonlinear odd-monotonically increasing activation functions, superior convergence could be achieved. Computer-simulation examples substantiate the efficacy of such a ZNN model in the context of solution of time-varying generalized linear matrix equations.