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《Journal of Yanshan University》 2002-02
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Two Methods of Weak Signal Detection of Duffing Oscillator and their Difference

(Jiang Wanlu), (WuShengqiang), (Zhang Jiancheng),(The College of Mechanical Engineering, Yanshan University, Qinhuangdao 066004).  
This paper gives two methods of weak signal detection by the chaotic characteristics of Duffing oscillator: One method is making use of the oscillator sensibility to the small signal having the tiny angular frequency difference with the referential signal and immunity against the random noise and the larger interference signal having larger angular frequency difference with the referential signal to detect weak signal, the other is making use of altering intension of noise or adjusting system parameter to extract weak signal by producing stochastic resonance. This paper compares the mechanism of the two methods and gives their differences.
【Fund】: 霍英东教育基金会第七届青年教师基金资助项目(编号:71061)。
【CateGory Index】: TH113.1
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