A constructive role of internal noise on coherence resonance induced by external noise in a calcium oscillation system
A constructive role of internal noise on coherence resonance induced by external noise in a calcium oscillation system
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DOI：
10.1016/j.chaos.2007.12.001
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发表时间：
2009-07
影响因子：
7.8
通讯作者：
Guang Yu;M. Yi;Y. Jia;Jun Tang
中科院分区：
文献类型：
--
作者：
Guang Yu;M. Yi;Y. Jia;Jun Tang
利用化学朗之万方程方法研究了同时受外噪声和内噪声驱动的胞质钙离子随机振荡模型。当细胞外刺激为亚阈值时，发现内噪声相干共振可以被外噪声抑制，而外噪声相干共振可以通过调制内噪声强度而增强。除了从竞争机制的角度对结果进行定性分析外，还利用小噪声近似和分岔分析对结果进行了进一步的理论解释。
A stochastic cytosolic calcium oscillation model simultaneously driven by external noise and internal noise has been investigated by using the chemical Langevin equation method. When the extracellular stimulation is subthreshold, it is found that the internal-noise coherence resonance can be suppressed by the external noise, while the external-noise coherence resonance can be enhanced by modulating the internal-noise intensity. Besides a qualitative analysis with a competitive mechanism is given for the results, a further explanation is also provided theoretically by using the small noise approximation and bifurcation analysis.