Stochastic Resonance of a Periodically Driven Bistable System with Two Different Kinds of Time Delays  

作　　者：ZENG Chun-Hua ZHOU Xiao-Feng ZENG Qin-Huang YU Huan LI Zhi-Xiong 

机构地区：[1]Faculty of Science, Kunming University of Science and Technology, Kunming 650093, China [2]Department of Physics, Qujing Normal University, Qujing 655000, China [3]Department of Physics, Yunnan University, Kunming 650091, China

出　　处：《Communications in Theoretical Physics》2009年第11期871-875,共5页理论物理通讯（英文版）

基　　金：Supported by the Natural Science Foundation of Yunnan Province under Grant No.08C0235

摘　　要：In this paper, we study the phenomenon of stochastic resonance （SR） in a periodically driven bistable system with correlations between multiplicative and additive white noise terms when there, are two different kinds of time delays existed in the deterministic and fluctuating forces, respectively. Using the small time delay approximation and the theory of signal-to-noise ratio （SNR） in the adiabatic limit, the expression of SNR is obtained. The effects of the delay time T in the deterministic force, and the delay time 8 in the fluctuating force on SNR are discussed. Based on the numerical computation, it is found that： （i） There appears a reentrant transition between one peak and two peaks and then to one peak again in the curve of SNR when the value of the time delay θ is increased. （ii） SR can be realized by tuning the time delay T or 8 with fixed noise, i.e., delay-induced stochastic resonance （DSR） exists.

关 键 词：stochastic resonance time delays bistable system 

分 类 号：O324[理学—一般力学与力学基础] TN929[理学—力学]