期刊
NONLINEAR DYNAMICS
卷 67, 期 1, 页码 329-333出版社
SPRINGER
DOI: 10.1007/s11071-011-9980-y
关键词
Stochastic resonance; Bias monostable system; Signal-to-noise ratio
资金
- National Science Foundation of China [10872165, 10932009]
- Outstanding Science and Technology Pre-Research Foundation of Shaanxi Normal University, China [200902011]
- Shaanxi Normal University [GK200902045]
The stochastic resonance in a bias monostable system driven by a periodic rectangular signal and uncorrelated noises is investigated by using the theory of signal-to-noise (SNR) in the adiabatic limit. The analytic expression of the SNR is obtained for arbitrary signal amplitude without being restricted to small amplitudes. The SNR is a nonmonotonic function of intensities of multiplicative and additive noises and the noise intensity ratio R=D/Q, so stochastic resonance exhibits in the bias monostable system. We investigate the effect of any system parameter (such as D,Q,R,r) on the SNR. It is shown that the SNR is a nonmonotonic function of the static asymmetry r, also; the SNR is decreased when |r| is increased. Moreover, the SNR is increased when the noise intensity ratio R=D/Q is increased.
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