Effects of time delay on stochastic resonance of a periodically driven linear system with multiplicative and periodically modulated additive white noises  

作　　者：杜鲁春 梅冬成 

机构地区：[1]Department of Physics,Yunnan University

出　　处：《Chinese Physics B》2009年第3期946-951,共6页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No 10865006)

摘　　要：Stochastic resonance （SR） of a periodically driven time-delayed linear system with multiplicative white noise and periodically modulated additive white noise is investigated. In the condition of small delay time, an approximate analytical expression of output signal-to-noise ratio （SNR） is obtained. The analytical results indicate that （1） there exists a resonance peak in the curve for SNR versus time delay; （2） the time delay will suspend the SR dramatically for SNR versus other parameters of the system, such as noise intensity, correlation intensity, and signal frequency, once a certain value is reached, the SR phenomenon disappears.Stochastic resonance （SR） of a periodically driven time-delayed linear system with multiplicative white noise and periodically modulated additive white noise is investigated. In the condition of small delay time, an approximate analytical expression of output signal-to-noise ratio （SNR） is obtained. The analytical results indicate that （1） there exists a resonance peak in the curve for SNR versus time delay; （2） the time delay will suspend the SR dramatically for SNR versus other parameters of the system, such as noise intensity, correlation intensity, and signal frequency, once a certain value is reached, the SR phenomenon disappears.

关 键 词：linear system time delay stochastic resonance 

分 类 号：N93[自然科学总论]