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Stochastic resonance in the gene transcriptional regulatory system subjected to noises |
Wang Can-Jun(王参军)† |
Nonlinear Research Institute, Baoji University of Arts and Sciences, Baoji 721007, China |
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Abstract We have investigated in the adiabatic limit the phenomenon of stochastic resonance in the gene transcriptional regulatory system subjected to an additive noise, a multiplicative noise, and a weakly periodic signal. Using the general two-state approach for the asymmetry system, the analytic expression of signal-to-noise ratio is obtained. The effects of the additive noise intensity α, the multiplicative noise intensity D and the amplitude of input periodic signal A on the signal-to-noise ratio are analysed by numerical calculation. It is found that the existence of a maximum in the RSNR--$\alpha$ and RSNR--D plots is the identifying characteristic of the stochastic resonance phenomenon in the weakened noise intensity region. The stochastic resonance phenomena are restrained with increasing $\alpha$ and D, and enhanced with increasing A.
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Received: 24 May 2009
Revised: 30 August 2009
Accepted manuscript online:
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Fund: Project supported by the National
Natural Science Foundation of China (Grant No.~10865006), the
Science Foundation of the Education Bureau of Shaanxi Province of
China (Grant No.~09JK331) and the Science Foundation of Baoji
University of Science and Arts of China (Grant No.~Zk0834). |
Cite this article:
Wang Can-Jun(王参军) Stochastic resonance in the gene transcriptional regulatory system subjected to noises 2010 Chin. Phys. B 19 030503
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