弱单色驱动下的随机共振：高频信号诱导的高于1的增益
Stochastic resonance with weak monochromatic driving: gains above unity induced by high-frequency signals
摘要：
研究了高频信号对噪声干扰系统对低频亚阈值正弦信号响应的影响。我们表明，通过方便地选择HF信号的振幅与其频率的比率，可以在低频值处测量大于1的随机共振增益。因此，HF信号的添加可以带来对弱单色信号的检测的改进。结果解释的一个有效的模型，并说明了通过数值模拟。
英文摘要：
We study the effects of a high-frequency (HF) signal on the response of a noisy bistable system to a low-frequency subthreshold sinusoidal signal. We show that, by conveniently choosing the ratio of the amplitude of the HF signal to its frequency, stochastic resonance gains greater than unity can be measured at the low-frequency value. Thus, the addition of the HF signal can entail an improvement in the detection of weak monochromatic signals. The results are explained in terms of an effective model and illustrated by means of numerical simulations.
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