Noise-induced oscillation and stochastic resonance in an autonomous chemical reaction system.
An autonomous three-variable chemical reaction model, which has been developed to describe kinetic oscillations in the NO+CO reaction, subjected to external parametric noise, is investigated. Noise-induced coherent oscillations (NICO's) in the absence of deterministic oscillations are observed near supercritical Hopf bifurcation points, and the NICO strength goes through a maximum with increments of noise intensity, characteristic of the occurrence of stochastic resonance. On the other hand, these phenomena do not appear if the limit cycle is created by a saddle-loop bifurcation.
Hou
Z
Z
Department of Chemical Physics, Center of Nonlinear Science, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
Xin
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