Synchronization control for arrays of coupled discrete-time delayed Cohen-Grossberg neural networks

This paper investigates the global exponential synchronization for an array of coupled discrete-time Cohen-Grossberg neural networks (CGNNs) with time-varying delay in which both the constant coupling and delayed one are considered Through constructing an improved Lyapunov-Krasovskii functional the delay-dependent sufficient condition is obtain lined to guarantee the global synchronization based on linear matrix inequality (LMI) approach The criterion is presented in terms of LMIs and its feasibility can be easily checked by resorting to Matlab LMI Toolbox Moreover the addressed system can include some famous neural network models as its special cases which can help extend those present results Finally the effectiveness of the proposed method can be further illustrated with the help of two numerical examples (C) 2010 Elsevier B V All rights reserved