中国物理B ›› 2010, Vol. 19 ›› Issue (3): 30503-030503.doi: 10.1088/1674-1056/19/3/030503

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Stochastic resonance in the gene transcriptional regulatory system subjected to noises

王参军   

  1. Nonlinear Research Institute, Baoji University of Arts and Sciences, Baoji 721007, China
  • 收稿日期:2009-05-24 修回日期:2009-08-30 出版日期:2010-03-15 发布日期:2010-03-15
  • 基金资助:
    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).

Stochastic resonance in the gene transcriptional regulatory system subjected to noises

Wang Can-Jun(王参军)   

  1. Nonlinear Research Institute, Baoji University of Arts and Sciences, Baoji 721007, China
  • Received:2009-05-24 Revised:2009-08-30 Online:2010-03-15 Published:2010-03-15
  • Supported by:
    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).

摘要: 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--α 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 α and D, and enhanced with increasing A.

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.

Key words: gene transcriptional regulatory system, stochastic resonance, noises

中图分类号:  (Noise)

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