方波和非对称双值噪声作用下的熵随机共振研究

摘要

The entropic stochastic resonance( ESR)in a confined system driven by asymmetric dichotomous noise, white noise,and a square-wave signal is investigated. Under the adiabatic approximation condition,the expression of the output signal-to-noise ratio( SNR)is obtained. It is shown that the SNR is a non-monotonic function of the strength and asymmetry of the dichotomous noise,of the intensity of the white noise,and the amplitude of the square-wave signal. Moreover,the SNR varies non-monotonously with the increase of the parameters of the confined structure. The influence of the correlation rate of the dichotomous noise on the SNR is also discussed.%研究了在非对称双值噪声、白噪声和方波共同作用下受限系统中的熵随机共振现象。在绝热近似条件下，推导出了输出信噪比的表达式。分析表明，信噪比是非对称双值噪声的强度与非对称参数、白噪声强度，以及方波信号幅度的非单调函数。另外，信噪比随受限结构参数的变化而非单调变化。讨论了双值噪声的相关率对SNR的影响。