Stochastic Resonance for a Time-Delayed Metapopulation System Driven by Multiplicative and Additive Noises  

作　　者：WANG Kang-Kang LIU Xian-Bin 王康康;刘先斌(State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016;School of Mathematics and Physics,Jiangsu University of Science and Technology,Zhenjiang 212003)

机构地区：[1]State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016 [2]School of Mathematics and Physics,Jiangsu University of Science and Technology,Zhenjiang 212003

出　　处：《Chinese Physics Letters》2013年第7期34-37,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 11072107,91016022,11232007,and 11205071.

摘　　要：The stochastic resonance(SR)phenomenon induced by the periodic signal in a metapopulation system which is driven by noises and contains a time delay is investigated.Under the condition of small delay time,the analytical expression of signal-to-noise ratio(SNR)is derived in the adiabatic limit.Via numerical calculations,each effect of the additive noise intensity,the multiplicative noise intensity and the delay time upon the SNR is discussed,respectively.It is shown that both the additive noise intensity and the multiplicative noise intensity can play a role in restraining the SR phenomenon,and for the additive noise,even a very small intensity can excite the SR phenomenon.For the delay time,the different role upon the SR phenomenon is discovered finally.

关 键 词：DELAY ADDITIVE MULTIPLICATIVE 

分 类 号：O17[理学—数学]