周期矩形信号作用下时滞非对称单稳系统的随机共振OA北大核心CSCDCSTPCD
Stochastic resonance in a time-delayed asymmetric mono-stable system modulated by periodic rectangular signal
研究了周期矩形信号对时滞非对称单稳系统随机共振的影响,系统中加入的噪声均为Gauss白噪声.得到了信噪比的解析表达式,通过分析信噪比曲线发现系统存在随机共振现象.数值结果还表明乘性与加性噪声强度对信噪比的影响是不同的,在SNR-D参数平面上共振与抑制共存.在信噪比随着时滞量变化的曲线图上发现,当系统的非称性|r|取值很大或者乘性与加性噪声强度比D/α小于1时,参数平面上的随机共振现象会消失.
We investigate the stochastic resonance of the time-delayed mono-stable system modulated by periodic rectangular signal and Gaussian white noises.The expression of signal-to-noise ratio(SNR) is obtained,and the stochastic resonance phenomenon is found in this system.The study shows that the effects of multiplicative intensily and white noise intensity on S N R are different.In the S N R-D plot,the phenomena of resonance and suppression coexist.When the value…查看全部>>
张晓燕;徐伟;周丙常
西北工业大学应用数学系,西安710072西北工业大学应用数学系,西安710072西北工业大学应用数学系,西安710072
数理科学
时滞非对称单稳系统随机共振周期矩形信号
the time-delayed asymmetric mono-stable systemstochastic resonanceperiodic rectangular signal
《物理学报》 2012 (3)
47-51,5
国家自然科学基金(批准号:10872165 11102155)资助的课题
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