Frequency enhancement in coupled noisy excitable elements: Effects of network topology

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题名:	Frequency enhancement in coupled noisy excitable elements: Effects of network topology
作者:	黎璧賢;Chiang, Wei-Yin;Lai, Pik-Yin;Chan, Chi-Keung
贡献者:	理學院物理學系
关键词:	Analysis;Complex Systems;Condensed Matter Physics;Exact sciences and technology;Fluctuation phenomena, random processes, noise, and brownian motion;Fluid- and Aerodynamics;Network architecture;Noise;Physics;Physics and Astronomy;Regular Article;Solid State Physics;Statistical physics, thermodynamics, and nonlinear dynamical systems
日期:	2013-01-01
上传时间:	2026-04-23 11:58:50 (UTC+8)
出版者:	Springer New York;Berlin/Heidelberg: Springer Berlin Heidelberg
摘要:	摘要： Coupled excitable elements in the presence of noise can exhibit oscillatory behavior with non-trivial frequency dependence as the coupling strength of the system increases. The phenomenon of frequency enhancement (FE) occurs in some coupling regime, in which the elements can oscillate with a frequency higher than their uncoupled frequencies. In this paper, details of the FE are investigated by simulations of the FitzHugh-Nagumo model with different network topologies. It is found that the characteristics of FE, such as the maximal enhancement coupling, enhancement level etc, are functions of the network topology and spatial dimensions. The effect of excitability and the spatio-temporal patterns during FE are investigated to provide an intuitive picture for the enhancement mechanism. Interestingly, some of these characteristics of FE can be described by scaling laws; suggesting the existence of universality in the FE phenomenon. The relevance of these results to biological rhythms are also discussed. 其他題名： Eur. Phys. J. B 出版者： Berlin/Heidelberg: Springer Berlin Heidelberg 出版日期： 2013-07-01 出處： The European physical journal. B, Condensed matter physics, 2013-07, Vol.86 (7), Article 327 資源來源： EBSCOhost Academic Search Premier 版權： EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2013 版權： 2014 INIST-CNRS 版權： COPYRIGHT 2013 Springer 識別號： ISSN: 1434-6028 識別號： EISSN: 1434-6036 識別號： DOI: 10.1140/epjb/e2013-40422-7
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