共查询到18条相似文献,搜索用时 609 毫秒
1.
有阻尼Sine-Gordon方程的全局吸引子的维数 总被引:2,自引:0,他引:2
本文通过引入新范数,得到有阻尼Sine-Gordon方程的Dirichlet问题的全局吸引子的维数的一个估计.结果表明:当“阻尼”与“扩散”同时增大或正弦项系数减小时,吸引子的维数减小.特别地,得到了零维吸引子存在的参数条件. 相似文献
2.
具阻尼的非线性波动方程整体吸引子的Hausdorff维数、分形维数估计 总被引:1,自引:0,他引:1
本文得到了一类具有线性阻尼且非线性项满足临界增长条件的非线性波动方程整体吸引子的Hausdorff维数、分形维数估计. 相似文献
3.
Sine—Gordon方程的全局吸引子的维数估计 总被引:1,自引:0,他引:1
本文得到了阻尼Sine-Gordon方程的狄氏问题的全局吸引子的Hausdorff维数以偶数上界的参数条件,特别地,当阻尼与Laplae算子的第一个特征值适当大时,全局吸引子是零维的,零维吸引子恰是系统的唯一平衡解并且指数吸引相空间的有界集。 相似文献
4.
本文得到了一类具有线性阻尼且非线性项满足临界增长条件的非线性波动方程整体吸引子的Hausdorff维数,分形维数估计。 相似文献
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木文对Ginzburg-Landau-Newed模型的动力学行为进行了讨论,得到了该模型的整体吸引子的存在性,同时得到了此吸引子维数的下界估计和该吸引子的Hausdorff维数和Wactal(分形)维数的上界估计. 相似文献
7.
黄海洋 《数学物理学报(A辑)》2002,22(3):316-322
文章通过对空间变量的有限差分方法离散了具有周期边值的Burgers Ginzburg Landau方程组.研究了这个离散方程组初值问题解的适定性.证明了当差分网格足够大时离散方程组存在吸引子,并得到了吸引子的Hausdorff维数和分形维数的上界估计.这个上界不会随着网格的加细而无限增大,因此数值分析离散的有限维系统的吸引子可以近似探讨原无限维系统的吸引子. 相似文献
8.
带有阻尼项的广义对称正则长波方程的指数吸引子 总被引:2,自引:0,他引:2
考虑了带有阻尼项的广义对称正则长波方程的整体快变动力学.证明了与该方程有关的非线性半群的挤压性质和指数吸引子的存在性.对指数吸引子的分形维数的上界也进行了估计. 相似文献
9.
Ginzburg—Landau—Newell模型的动力学行为 总被引:2,自引:1,他引:1
本文对Ginzburg-Landau-Newell模型的动力学行为进行了讨论,得到了该模型的整体吸引子的存在性,同时得到了此吸引子维数的下界估计和该吸引子的Hausdorff维数和Fractal维数的上界估计。 相似文献
10.
本文研究了一类二维非线性Schrodinger方程解的有限维行为,我们得到了此方程存在吸引子,并得到了此吸引子维数的上界估计 相似文献
11.
J. Valero 《Acta Mathematica Hungarica》2000,88(3):239-258
We study the fractal dimension of the global attractor generated by a multivalued reaction-diffusion equation for which there
is no uniqueness of solutions. First we give an example of a global attractor having infinite fractal dimension. Then under
certain conditions we obtain an estimate of the fractal dimension.
This revised version was published online in June 2006 with corrections to the Cover Date. 相似文献
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《Applied mathematics and computation》2001,117(2-3):257-265
This paper presents a more precise estimate on the dimension of the global attractor for spatially discretized damped sine-Gordon equation with periodic boundary condition. The gained Hausdorff dimension is consistent with the continuous case and conforms to physics. 相似文献
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周盛凡 《应用数学学报(英文版)》2000,16(3):266-273
1. IntroductionConsider the strongly damped nonlinear wave equationwith the Dirichlet boundary conditionand the initial value conditionswhere u = u(x, t) is a real--valued function on fi x [0, co), fi is an open bounded set of R"with smooth boundary off, or > 0, g e L'(fl), D(--Q) ~ Ha(~~) n H'(fl).We assume for the function f(u) as follows'f(u) E CI (R, R) satisfiesfor any ig al, uZ E R, where k, hi > 0, i ~ 0, 1, 2, 61 > 0 and 0 5 6o < 1'The type of equation (1) can be regarded as the… 相似文献
15.
In this paper, we consider a periodic boundary value problem for a non-classical reaction-diffusion equation with memory. In other paper, we use the ω-limit compactness of the solution semigroup {S(t)}t≥0 to get the existence of a global attractor. The main goal here is to give an estimate of the fractal dimension of the global attractor. By the fractal dimension theorem given by A.O. Celebi et al., we obtain that the fractal dimension of the global attractor for the problem is finite; this makes the results for the non-classical reaction-diffusion equations more substantial and perfect. 相似文献
16.
Zhou Shengfan 《Proceedings of the American Mathematical Society》1999,127(12):3623-3631
An estimate on the Hausdorff dimension of the global attractor for damped nonlinear wave equations, in two cases of nonlinear damping and linear damping, with Dirichlet boundary condition is obtained. The gained Hausdorff dimension is bounded and is independent of the concrete form of nonlinear damping term. In the case of linear damping, the gained Hausdorff dimension remains small for large damping, which conforms to the physical intuition.
17.
We study a semilinear hyperbolic problem, written as a second-order evolution equation in an infinite-dimensional Hilbert space. Assuming existence of the global attractor, we estimate its fractal dimension explicitly in terms of the data. Despite its elementary character, our technique gives reasonable results. Notably, we require no additional regularity, although nonlinear damping is allowed. 相似文献
18.
An estimate for the Hausdorff dimension of attractor for two-dimensional equations of Oldroyd fluids
The minimal global B-attractor for a system of equations describing two-dimensional flows of Oldroyd fluids is considered.
An asymptotic estimate for the Hausdorff dimension of the attractor is obtained for small values of the viscosity. Bibliography:
11 titles.
Translated fromZapiski Nauchnykh Seminarov POMI Vol. 226, 1996, pp. 109–119. 相似文献