TY - JOUR
T1 - Stochastic resonance in two kinds of asymmetric nonlinear systems with time-delayed feedback and subject to additive colored noise
AU - Tan, Hang
AU - Liang, Xuesong
AU - Wu, Zhaoyao
AU - Wu, Yuankai
AU - Tan, Huachun
N1 - Publisher Copyright:
© 2018
PY - 2019/2
Y1 - 2019/2
N2 - This paper attempts to investigate the stochastic resonance (SR) behaviors in two kinds of asymmetric nonlinear systems with time-delayed feedback driven by additive colored noise by virtue of two-state theory, small time delay approximation, path integral approach, and unified colored-noise approximation, where asymmetric nonlinear systems include asymmetric well depth and asymmetric well width alone. The characteristics of SR in two kinds of asymmetric systems are different for different asymmetric ratios and correlated times of additive colored noise. For asymmetric well width, optimal noise intensity is independent of asymmetric ratio and correlated time, whereas for asymmetric well depth it is closely related with asymmetric ratio and correlated time. However, optimal noise intensity is closely related with feedback intensity, and time-delay for two kinds of asymmetries. Even there exists the optimal feedback intensity, time delay and correlated time to make output SNR maximum. Above clues are helpful to achieve weak signal detection under strong background noise.
AB - This paper attempts to investigate the stochastic resonance (SR) behaviors in two kinds of asymmetric nonlinear systems with time-delayed feedback driven by additive colored noise by virtue of two-state theory, small time delay approximation, path integral approach, and unified colored-noise approximation, where asymmetric nonlinear systems include asymmetric well depth and asymmetric well width alone. The characteristics of SR in two kinds of asymmetric systems are different for different asymmetric ratios and correlated times of additive colored noise. For asymmetric well width, optimal noise intensity is independent of asymmetric ratio and correlated time, whereas for asymmetric well depth it is closely related with asymmetric ratio and correlated time. However, optimal noise intensity is closely related with feedback intensity, and time-delay for two kinds of asymmetries. Even there exists the optimal feedback intensity, time delay and correlated time to make output SNR maximum. Above clues are helpful to achieve weak signal detection under strong background noise.
KW - Additive colored noise
KW - Asymmetric well depth
KW - Asymmetric well width
KW - Stochastic resonance
KW - Time delay
UR - http://www.scopus.com/inward/record.url?scp=85057798433&partnerID=8YFLogxK
U2 - 10.1016/j.cjph.2018.11.005
DO - 10.1016/j.cjph.2018.11.005
M3 - Article
AN - SCOPUS:85057798433
SN - 0577-9073
VL - 57
SP - 362
EP - 374
JO - Chinese Journal of Physics
JF - Chinese Journal of Physics
ER -