| 野生果蝇生物钟模型中的相干共振现象 |
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| 引用本文： | 臧传芹.野生果蝇生物钟模型中的相干共振现象[J].科学技术与工程,2009,9(21). |
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| 作者姓名： | 臧传芹 |
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| 作者单位： | 防化指挥工程学院基础部,北京,102205 |
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| 摘 要： | 采用数值模拟方法,研究了Kloss提出的果蝇生物钟模型的在不同控制参数下的动力学行为,随后对这个果蝇生物钟模型中加入加性白噪声进行随机扰动分析.在系统处在离分岔点较远的稳定态时, 在M速度项上加入高斯型白噪声,发现系统利用噪声,产生协同效应,发生相干共振现象.并且,存在一个最优的噪音强度,使得噪声和体系之间达到了最佳匹配;另一方面,通过计算还发现系统受到高斯白噪声的扰动时,引起振荡的周期保持在24 h左右.
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| 关 键 词： | 高斯白噪声 功率谱 信噪比 相干共振 |
| 收稿时间： | 7/23/2009 7:24:29 PM |
| 修稿时间： | 7/23/2009 7:24:29 PM |
Coherence Resonance in Circadian Rhythms of Fruit Flies |
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| ZANG Chuan-qin.Coherence Resonance in Circadian Rhythms of Fruit Flies[J].Science Technology and Engineering,2009,9(21). |
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| Authors: | ZANG Chuan-qin |
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| Abstract: | In the present work, using the fruit-flies circadian system, we investigate its dynamical behavior and the effect of the white-noise on the nonlinear system numerically. When the system is located in the stable-equilibrium which is far away from the Hopf bifurcation, adding the white-noise on the velocity stem, it is found that under the influence of white-noise coherence resonance occurs and the period of oscillation is close to 24 hours. |
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| Keywords: | Gauss-white noise power spectrum signal-noise-ratio coherence resonance |
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