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The effect of diversity on dynamics of coupled FitzHugh-Nagumo neurons on complex networks is numerically investigated,where each neuron is subjected to an exteal subthreshold signal.With the diversity the network is a mixture of excitable and oscillatory neurons,and the diversity is determined by the variance of the systems parameter.The complex network is constructed by randomly adding long-range connections (shortcuts) on a nearest-neighbouring coupled one-dimensional chain.Numerical results show that exteal signals are maximally magnified at an intermediate value of the diversity,as in the case of well-known stochastic resonance.Furthermore,the effects of the number of shortcuts and coupled strength on the diversity-induced phenomena are also discussed.These findings exhibit that the diversity may play a constructive role in response to exteal signal,and highlight the importance of the diversity on such complex networks.