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随机FitzHugh-Nagumo格点系统的随机吸引子

Random Attractor of Stochastic FitzHugh-Nagumo Equations

【作者】 金庆飞

【导师】 周盛凡;

【作者基本信息】 上海师范大学 , 运筹学与控制论, 2011, 硕士

【摘要】 本文旨在考虑了具有可乘白噪声的FitzHugh-Nagumo格点系统的随机吸引子。通过Ornstein-Uhlenbeck变换,将系统化为随机变量作为系数的随机微分方程,其解确定一个随机动力系统。我们首先证明该随机动力系统的吸收集的存在性,然后证明随机动力系统是渐近紧的,最后得出该系统存在随机吸引子。

【Abstract】 The present paper is devoted to the existence of the random attractor of stochastic FitzHugh-Nagumo infinite lattice system with multiplicative white noise. Using the Ornstein-Uhlenbeck transform, the lattice system is transformed into a random differential equation with random coefficients ,which generate a Random Dynamical System. We firstly show the existence of a random bounded absorbing set. Then we prove that the random dynamical system is asymptotically compact. Finally, we prove the existence of the random attractor.

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