Time-Delay Enhanced Coherence Resonance in a Discrete Neuron with Noises
WANG Can-Jun1,2**, YANG Ke-Li1,2, QU Shi-Xian1
1Institute of Theoretical and Computational Physics, School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062 2Nonlinear Research Institute, Baoji University of Arts and Sciences, Baoji 721016
Abstract：Coherence resonance in a discrete excitable neuronal model with noises and time delays is investigated. The effects of the time delays on coherence resonance are revealed in two cases: Gaussian white and Gaussian color noises, respectively. The coefficient of variation of interspike intervals is calculated by numerical simulation. The results show that the coherence resonance is enhanced with the time delay increasing in the weak noises intensity cases, while there is no effect in the large noise intensity. Moreover, the coherence resonance can be held back by the self-correlation time, when the system is driven by a color noise.
2014, Vol. 31 
