Effects of time delay on stochastic resonance of a periodically driven linear system with multiplicative and periodically modulated additive white noises

• 来源期刊: 中国物理B（英文版）
• 关键词: linear system time delay stochastic resonance
• 年，卷（期）: 2009,（3）
• 页码范围: 946-951
• 页数: 6页
• 语种: 英文

摘要

Stochastic resonance (SR) of a periodically driven time-delayed linear system with multiplicative white noise and periodically modulated additive white noise is investigated. In the condition of small delay time, an approximate analytical expression of output signal-to-noise ratio (SNR) is obtained. The analytical results indicate that (1) there exists a resonance peak in the curve for SNR versus time delay; (2) the time delay will suspend the SR dramatically for SNR versus other parameters of the system, such as noise intensity, correlation intensity, and signal frequency, once a certain value is reached, the SR phenomenon disappears.