Excitability transitions and wave dynamics under spatiotemporal structured noise.

Excitability transitions and wave dynamics under spatiotemporal structured noise.
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时空结构噪声下的兴奋性转变和波动力学。

DOI:
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发表时间:
2002
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
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通讯作者:
José M. Sancho
José M. Sancho
中科院分区:
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文献类型:
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作者:
Sergio Alonso;Francesc Sagués;José M. Sancho

文献摘要

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我们提出了一个分析和数值研究的影响,在活跃的媒体外部波动。我们的分析方法将初始随机偏微分方程转化为一组有效的确定性反应扩散方程。因此,我们能够解释和定量预测噪声的系统性和建设性的影响,例如,目标模式创建的噪声和行波或螺旋波持续的噪声。我们的研究包括现实噪声的时间和空间结构的情况下。
We present an analytic and numerical study of the effects of external fluctuations in active media. Our analytical methodology transforms the initial stochastic partial differential equations into an effective set of deterministic reaction-diffusion equations. As a result we are able to explain and make quantitative predictions on the systematic and constructive effects of the noise, for example, target patterns created out of noise and traveling or spiral waves sustained by noise. Our study includes the case of realistic noises with temporal and spatial structures.