二值噪声驱动下二阶线性系统的随机共振  

Stochastic resonance for dichotomous noise in a second derivative linear system

作　　者：郭立敏[1] 徐伟[1] 阮春蕾[1] 赵燕[1] 

机构地区：[1]西北工业大学应用数学系,西安710072

出　　处：《物理学报》2008年第12期7482-7486,共5页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10872165)资助的课题~~

摘　　要：研究了二值噪声驱动下二阶线性系统的随机共振问题.采用平均法推导出系统输出幅值增益的表达式,考察了幅值增益与系统频率、输入信号频率、噪声强度和噪声相关时间的关系,发现系统输出幅值增益随这些参量呈单峰共振变化.另外,二值噪声的非对称性对共振峰值具有很大影响.We investigated the stochastic resonance for dichotomous noise in a second derivative linear system, measured the average to get the amplitude gain of the output signal, and studied its relationship with the frequency of the system, the frequency of the signal, the strength and correlation time of noises. The amplitude gain of the output signal shows a nonmonotonie dependence on these factors, and the parameter of the dichotomous noise effects the peak value of stochastic resonance.

关 键 词：随机共振 幅值增益 二值噪声 二阶线性系统 

分 类 号：O324[理学—一般力学与力学基础] TM571.6[理学—力学]