共查询到20条相似文献,搜索用时 62 毫秒
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Kuramoto-Sivashinsky方程的渐近吸引子 总被引:10,自引:0,他引:10
本文给出了一周期边界条件下K-S方程的有限维渐进吸引子(Asymptotic Attractor)而非通常的近似吸引子(Approximate Attractor)。 相似文献
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利用拉回吸引子的存在性理论,证明了具有KD-拉回吸引的非自治动力系统拉回吸引子的存在性,拉回吸引子是单点集,是不变的.对无解域上的非自治反映扩散方程,证明了拉回指数吸引子的存在性,是方程唯一拉回指数吸引的稳定解. 相似文献
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该文研究了描述流体力学规律的一类带有弱耗散和扰动外力项的两维非自治不可压Navier-Stokes方程拉回吸引子的上半连续性.利用半群(过程族)的分解方法以及弱连续方法,可以得到自治系统全局吸引子和非自治系统拉回吸引子的存在性,进一步地,当ε0收敛到ε=0时候,非自治系统的拉回吸引子A_ε(t)可以连续收敛到自治系统的全局吸引子A. 相似文献
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本文研究了非线性应变波方程与薛定谔方程耦合组在?3上的柯西问题与极大吸引子存在性. 相似文献
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本文研究了非线性应变波方程与薛定谔方程耦合组在?3上的柯西问题与极大吸引子存在性. 相似文献
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本文研究了非线性应变波方程与薛定谔方程耦合组在~3上的柯西问题与极大吸引子存在性. 相似文献
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Alain Miranville 《Applications of Mathematics》2003,48(1):31-47
In this article we introduce the notion of a minimal attractor for families of operators that do not necessarily form semigroups. We then obtain some results on the existence of the minimal attractor. We also consider the nonautonomous case. As an application, we obtain the existence of the minimal attractor for models of Cahn-Hilliard equations in deformable elastic continua. 相似文献
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In the present paper, we study the long time behaviour of solutions for the long-short wave equations with zero order dissipation. We first construct the global weak attractor for this system in H²_{per} × H¹_{per}. And then by exact analysis of two energy equations, we show that the global weak at attractor is actually the global strong attractor in H²_{per}. 相似文献
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This paper is concerned with the three-dimensional non-autonomous BrinkmanForchheimer equation.By Galerkin approximation method,we give the existence and uniqueness of weak solutions for non-autonomous Brinkman-Forchheimer equation.And we investigate the asymptotic behavior of the weak solution,the existence and structures of the(H,H)-uniform attractor and(H,V)-uniform attractor.Then we prove that an L 2-uniform attractor is actually an H 1-uniform attractor. 相似文献
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Attractors for a Nonclassical Diffusion Equation 总被引:11,自引:0,他引:11
Yue-long XiaoDepartment of Mathematics Xiangtan University Xiangtan China 《应用数学学报(英文版)》2002,18(2):273-276
Abstract For a nonclassical diffusion equation,the asymptotic behavior is investigated,and the existence ofa global attractor is proved. 相似文献
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研究了一类非线性薛定谔型方程,描述了光波在光折射晶体中的传播.首先构造了该模型整体弱的吸引子,然后通过能量方程的精确分析,证明整体弱吸引子实际为系统整体强吸引子.最后给出了整体吸引子的分形维数和Hausdorff维数的上界估计. 相似文献
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Desheng Yang 《随机分析与应用》2013,31(6):1285-1303
Abstract Random systems may be more reasonable by incorporating influence of noise into deterministic systems. The notion of a random attractor is one of the very basic concepts of the theory of random dynamical systems. In this article, we consider the well-known Kuramoto–Sivashinsky equation with stochastic perturbation. Our aim is to attempt to obtain a so-called pull-back random attractor for stochastic Kuramoto–Sivashinsky equation. In particular, the Hausdorff dimension of a random attractor is finite. For simplicity, we always restrict ourselves to odd initial conditions, but the result for all initial conditions is also true. 相似文献
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非线性Sobolev-Galpern方程的有限维整体吸引子 总被引:5,自引:0,他引:5
本文研究非线性Sobolev-Galpern方程解的渐近性态.首先证明了该方程在H^2(Ω)∩H0^1(Ω)中整体弱吸引子的存在性,然后利用一个能量方程证明了整体弱吸引子实际上是整体强吸引子,建立了整体吸引子的有限维性. 相似文献
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Shengfan Zhou 《Applied Mathematics Letters》2003,16(8):1307-1314
We prove the existence of the global attractor for the semigroup generated by strongly damped wave equations when the nonlinearity has a critical growth exponent. 相似文献