Canard explosion and internal signal stochastic bi-resonance in the CO oxidation on platinum surface  

作　　者：ZHAO Gang HOU Zhonghuai XIN Houwen 

机构地区：[1]Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China

出　　处：《Science China Chemistry》2006年第2期133-139,共7页中国科学（化学英文版）

基　　金：This work was supported by the National Natural Science Foundation of China (Grant Nos. 20203017 & 20433050);the Foundation for the Author of National Excellent Doctorial Dissertation of China (FANEDD).

摘　　要：Canard explosion is a kind of complex temporal behavior and is ubiquitous in excitable systems. It is associated with an abrupt change of amplitude and period of an oscillatory trajectory in a very narrow interval of a control parameter. We have analyzed in the present paper the behavior of canard explosion that is near a supercritical Hopf bifurcation and its response to white noise in a temporal model of CO oxidation on platinum surface. We have found that the presence of canard explosion gives rise to internal signal stochastic bi-resonance, thus demonstrating a novel functional feature of noise: selective amplifying signals with different periods.Canard explosion is a kind of complex temporal behavior and is ubiquitous inexcitable systems. It is associated with an abrupt change of amplitude and period of an oscillatorytrajectory in a very narrow interval of a control parameter. We have analyzed in the present paperthe behavior of canard explosion that is near a supercritical Hopf bifurcation and its response towhite noise in a temporal model of CO oxidation on platinum surface. We have found that the presenceof canard explosion gives rise to internal signal stochastic bi-resonance, thus demonstrating anovel functional feature of noise: selective amplifying signals with different periods.

关 键 词：INTERNAL SIGNAL STOCHASTIC bi-resonance  CANARD explosion  CO oxidation on PLATINUM surface  excitable system  nullcline. 

分 类 号：N[自然科学总论]