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Impact of time delays on stochastic resonance in an ecological system describing vegetation.
- Source :
-
Physica A . Aug2014, Vol. 408, p96-105. 10p. - Publication Year :
- 2014
-
Abstract
- Abstract: In this paper, we investigate the stochastic resonance phenomenon in a vegetation ecological system with time delay, at which the vegetation dynamics is assumed to be disturbed by both intrinsic and extrinsic noises. The signal-to-noise ratio is calculated when a weak periodic signal is added to the system. The impacts of time delay and correlation strength between two noises on the signal-to-noise ratio are discussed, respectively. Our research results show that: (i) the increase of or can enhance the stochastic resonance in the signal-to-noise ratio as a function of intrinsic noise strength ; (ii) on the contrary, the increase of or can weaken the stochastic resonance in the signal-to-noise ratio as a function of extrinsic noise strength ; and (iii) the increase of can lead to double stochastic resonance phenomenon in the signal-to-noise ratio as a function of . [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 03784371
- Volume :
- 408
- Database :
- Academic Search Index
- Journal :
- Physica A
- Publication Type :
- Academic Journal
- Accession number :
- 96187388
- Full Text :
- https://doi.org/10.1016/j.physa.2014.04.015