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IEICE TRANSACTIONS on Fundamentals

Influence of Additive and Contaminant Noise on Control-Feedback Induced Chaotic Resonance in Excitatory-Inhibitory Neural Systems

Sou NOBUKAWA, Nobuhiko WAGATSUMA, Haruhiko NISHIMURA, Keiichiro INAGAKI, Teruya YAMANISHI

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Summary :

Recent developments in engineering applications of stochastic resonance have expanded to various fields, especially biomedicine. Deterministic chaos generates a phenomenon known as chaotic resonance, which is similar to stochastic resonance. However, engineering applications of chaotic resonance are limited owing to the problems in controlling chaos, despite its uniquely high sensitivity to weak signal responses. To tackle these problems, a previous study proposed “reduced region of orbit” (RRO) feedback methods, which cause chaotic resonance using external feedback signals. However, this evaluation was conducted under noise-free conditions. In actual environments, background noise and measurement errors are inevitable in the estimation of RRO feedback strength; therefore, their impact must be elucidated for the application of RRO feedback methods. In this study, we evaluated the chaotic resonance induced by the RRO feedback method in chaotic neural systems in the presence of stochastic noise. Specifically, we focused on the chaotic resonance induced by RRO feedback signals in a neural system composed of excitatory and inhibitory neurons, a typical neural system wherein chaotic resonance is observed in the presence of additive noise and feedback signals including the measurement error (called contaminant noise). It was found that for a relatively small noise strength, both types of noise commonly degenerated the degree of synchronization in chaotic resonance induced by RRO feedback signals, although these characteristics were significantly different. In contrast, chaos-chaos intermittency synchronization was observed for a relatively high noise strength owing to the noise-induced attractor merging bifurcation for both types of noise. In practical neural systems, the influence of noise is unavoidable; therefore, this study highlighted the importance of the countermeasures for noise in the application of chaotic resonance and utilization of noise-induced attractor merging bifurcation.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E106-A No.1 pp.11-22
Publication Date
2023/01/01
Publicized
2022/07/07
Online ISSN
1745-1337
DOI
10.1587/transfun.2022EAP1024
Type of Manuscript
PAPER
Category
Nonlinear Problems

Authors

Sou NOBUKAWA
  Department of Computer Science, Chiba Institute of Technology,National Center of Neurology and Psychiatry
Nobuhiko WAGATSUMA
  Toho University
Haruhiko NISHIMURA
  University of Hyogo
Keiichiro INAGAKI
  Chubu University
Teruya YAMANISHI
  Osaka Seikei University

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