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物理学报  2007 

Stochastic resonance in an asymmetric bistable system driven by mixed periodic force and noises
周期混合信号和噪声联合激励下的非对称双稳系统的随机共振

Keywords: asymmetric bistable system,stochastic resonance,signal-to-noise ratio,mixing period signals
非对称双稳系统
,随机共振,信噪比,周期混合信号

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Abstract:

The phenomenon of stochastic resonance (SR) in an asymmetric bistable system driven by correlated multiplicative and additive noise and two periodic fields is investigated. Analytic expressions of the signal-to-noise ratio (SNR) for fundamental and higher harmonics are derived using the two-state theory. The SR appears in both fundamental and higher harmonics. Moreover, the suppression exists for higher harmonics. The effects of static asymmetry and the noise intensity and the strength of coupling between noises on the SNR are studied.

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