Stochastic Resonance-Like and Resonance Suppression-Like Phenomena in a Bistable System with Time Delay and Additive Noise  

作　　者：SHU Chang-Zheng NIE Lin-Ru ZHOU Zhong-Rao 舒长征;聂林如;周忠饶(Faculty of Science,Kunming University of Science and Technology,Kunming 650093)

机构地区：[1]Faculty of Science,Kunming University of Science and Technology,Kunming 650093

出　　处：《Chinese Physics Letters》2012年第5期63-66,共4页中国物理快报（英文版）

基　　金：Supported by the Yunnan Provincial Foundation of China under Grant Nos 2009CD036 and 08Z0015.

摘　　要：Stochastic resonance (SR)-like and resonance suppression (RS)-like phenomena in a time-delayed bistable system driven by additive white noise are investigated by means of stochastic simulations of the power spectrum,the quality factor of the power spectrum,and the mean first-passage time (MFPT) of the system.The cal culative results indicate that:(i) as the system is driven by a small periodic signal,the quality factor as a function delay time exhibits a maximal value at smaller noise intensities,i.e.,an SR-like phenomenon.With the increment in additive noise inteusity,the extremum gradually disappears and the quality factor decreases monotonously with delay time.(ii) As the additive noise intensity is smaller,the curve of the MFPT with respect to delay time displays a peak,i.e.,an RS-like phenomenon.At higher levels of noise,however,the non-monotonic behavior is lost.

关 键 词：ADDITIVE delay system 

分 类 号：O17[理学—数学]