CHARACTERISTICS OF STOCHASTIC RESONANCE IN ASYMMETRIC DUFFING OSCILLATOR

被引：16

作者：

Arathi, S. ^{[1
]}

Rajasekar, S. ^{[1
]}

Kurths, J. ^{[2
]}

机构：

[1] Bharathidasan Univ, Sch Phys, Tiruchirappalli 620024, Tamil Nadu, India

[2] Postdam Inst Climate Impact Res, D-14469 Potsdam, Germany

来源：

INTERNATIONAL JOURNAL OF BIFURCATION AND CHAOS | 2011年 / 21卷 / 09期

关键词：

Stochastic resonance; asymmetric Duffing oscillator; signal-to-noise ratio; mean residence time;

D O I：

10.1142/S0218127411030064

中图分类号：

O1 [数学];

学科分类号：

0701 ; 070101 ;

摘要：

We study the characteristics of stochastic resonance (SR) in the Duffing oscillator with three types of asymmetries in its double-well potential. The asymmetries controlled by a parameter alpha are introduced in the potential by varying (i) the depth of the left-well alone, (ii) the location of the minimum of the left-well alone and (iii) both depth and location of the minimum of the left-well alone. The characteristics of SR in the asymmetric cases are different from the symmetric case (alpha = 1). We find that asymmetry has a strong influence on the optimum noise intensity at which signal-to-noise ratio (SNR) is maximum, mean residence time at resonance and the probability distribution of residence time in the left-and right-wells. For a range of values of alpha, alpha not equal 1, SNR is found to be relatively higher than for alpha = 1.

引用

页码：2729 / 2739

页数：11

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