Volume 86, Number 5, June 2009
Article Number 50002
Number of page(s) 6
Section General
Published online 11 June 2009
EPL, 86 (2009) 50002
DOI: 10.1209/0295-5075/86/50002

Cooperative effects of random time delays and small-world topologies on diversity-induced resonance

Dan Wu, Shiqun Zhu and Xiaoqin Luo

School of Physical Science and Technology, Suzhou University - Suzhou, Jiangsu 215006, PRC

received 29 August 2008; accepted in final form 14 May 2009; published June 2009
published online 11 June 2009

The phenomena of diversity-induced resonance in an array of coupled bistable systems with small-world connectivity and random time delays are investigated. It is found that the diversity $\sigma $ of the coupled network in the form of quenched noise can induce a resonant effect in response to external signals. By choosing proper value of the coupling c between elements and the normalized shortcut number p, the resonant behavior of the system is enhanced. The resonance is reduced when the mean delay time $\langle \tau \rangle $ in the system is increased. The resonance can be induced for relatively large $\langle \tau \rangle $ and p.

05.45.-a - Nonlinear dynamics and chaos.
05.40.-a - Fluctuation phenomena, random processes, noise, and Brownian motion.

© EPLA 2009