| Journal: | Brazilian journal of physics |
| Database: | PERIÓDICA |
| System number: | 000382340 |
| ISSN: | 0103-9733 |
| Authors: | Li, Chunxuan1 Yang, Tao2 |
| Institutions: | 1Yan-an Hospital of Kunming City, Department of Obstetrics, Kunming, Yunnan. China 2Yunnan University, Department of Physics, Kunming, Yunnan. China |
| Year: | 2015 |
| Season: | Jun |
| Volumen: | 45 |
| Number: | 3 |
| Pages: | 259-268 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental |
| English abstract | t In this paper, the resonant phenomenon for a bistable chemical system in the presence of noises and delayed feedback is investigated. The signal-to-noise ratio (SNR) is calculated when periodic signal is introduced additively (or multiplicatively). The impacts of the parameter μ of the reaction, time delay τ , strength K of the feedback loop, multiplicative (D) and additive (Q) noise strengths and cross-correlation strength λ between two noises on the SNR are discussed. When the periodic signal is introduced additively, our results show (i) the SNR as a function of the parameter μ exhibits a maximum, the existence of the maximum is a characteristic of the parametric resonance (PR) phenomenon; (ii) the SNR as a function of D exhibits only a maximum, however, for the case of SNR as a function of Q exhibits not only a maximum, but also a minimum. The existence of the maximum and minimum in the SNR is the identifying characteristics of the stochastic resonance (SR) and reverse-resonance (RR); and (iii) the increases of τ , K and λ enhance the SR and weaken the RR. Finally, we compare the resonant phenomenon for the additive periodic signal with that for multiplicative one in the chemical system |
| Disciplines: | Física y astronomía |
| Keyword: | Termodinámica y física estadística, Sistemas químicos, Fenómenos de resonancia, Ruido |
| Keyword: | Physics and astronomy, Thermodynamics and statistical physics, Chemical systems, Resonant phenomena, Noise |
| Full text: | Texto completo (Ver HTML) |
