中国物理B ›› 2009, Vol. 18 ›› Issue (5): 1725-1730.doi: 10.1088/1674-1056/18/5/002
林敏, 方利民, 郑永军
Lin Min(林敏)†, Fang Li-Min(方利民), and Zheng Yong-Jun(郑永军)
摘要: According to the characteristic structure of double wells in bistable systems, this paper analyses stochastic fluctuations in the single potential well and probability transitions between the two potential wells and proposes a method of controlling stochastic resonance by using a periodic signal. Results of theoretical analysis and numerical simulation show that the phenomenon of stochastic resonance happens when the time scales of the periodic signal and the noise-induced probability transitions between the two potential wells achieve stochastic synchronization. By adding a bistable system with a controllable periodic signal, fluctuations in the single potential well can be effectively controlled, thus affecting the probability transitions between the two potential wells. In this way, an effective control can be achieved which allows one to either enhance or realize stochastic resonance.
中图分类号: (Synchronization; coupled oscillators)