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周期矩形信号作用下时滞非对称单稳系统的随机共振
  • ISSN号：1000-3290
  • 期刊名称：Acta Physica Sinica
  • 时间：2012.3
  • 页码：47-51
  • 分类：O324[理学—一般力学与力学基础;理学—力学]
  • 作者机构：[1]西北工业大学应用数学系,西安710072
  • 相关基金：国家自然科学基金（批准号：10872165 11102155）资助的课题
  • 相关项目：随机时滞动力系统与阈值系统中的随机共振问题研究
作者： 张晓燕|徐伟|周丙常|
关键词： 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 system, stochastic resonance, periodic rectangular signal
中文摘要：

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.

英文摘要：

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 of the bias of system ｜r｜ is bigger or the ratio of multiplicative intensily to white noise intensity D/αis less than 1,the stochastic resonance phenomenon in the SNR-τplots disappears.

同期刊论文项目
随机时滞动力系统与阈值系统中的随机共振问题研究
期刊论文 9 会议论文 2
有界噪声激励下非线性系统的全局动力学研究
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期刊信息
  • 《物理学报》
  • 北大核心期刊（2011版）
  • 主管单位:中国科学院
  • 主办单位:中国物理学会 中国科学院物理研究所
  • 主编：欧阳钟灿
  • 地址：北京603信箱(中国科学院物理研究所)
  • 邮编：100190
  • 邮箱：apsoffice@iphy.ac.cn
  • 电话：010-82649026
  • 国际标准刊号：ISSN：1000-3290
  • 国内统一刊号：ISSN：11-1958/O4
  • 邮发代号:2-425
  • 获奖情况:
  • 1999年首届国家期刊奖,2000年中科院优秀期刊特等奖,2001年科技期刊最高方阵队双高期刊居中国期刊第12位
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  • 被引量:49876