Time-Delay Enhanced Coherence Resonance in a Discrete Neuron with Noises  

作　　者：王参军 杨科利 屈世显 

机构地区：[1]InstituteofTheoreticalandComputationalPhysics,SchoolofPhysicsandInformationTechnology,ShaanxiNormalUniversity,Xi'an710062 [2]NonlinearResearchInstitute,BaojiUniversityofArtsandSciences,Baoji721016

出　　处：《Chinese Physics Letters》2014年第8期8-11,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 11205006 and 10875076, the Scientific Research Program Fnded by Shaanxi Provincial Education Department under Grant No 12JK0962, and the Natural Science New Star of Science and Technologies Research Plan in Shaanxi Province under Grant No 2014KJXX-77.

摘　　要：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.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.

分 类 号：O42[理学—声学] TN911.23[理学—物理]