On the Determining Wavenumber for the Nonautonomous Subcritical SQG Equation

On the Determining Wavenumber for the Nonautonomous Subcritical SQG Equation
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非自治次临界SQG方程波数的确定

DOI:
10.1007/s10884-019-09794-7
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发表时间:
2019
影响因子:
1.3
通讯作者:
Dai, Mimi
Dai, Mimi
中科院分区:
数学3区
文献类型:
--
作者:
Cheskidov, Alexey;Dai, Mimi

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Cheskidov和Dai (Phys D Nonlinear Phenom 376-377:204-215, 2018)引入时变确定波数来估计地表准地转方程的确定模态数。在本文中,我们继续这一研究,重点是在亚临界情况下,并研究在有界的吸收集中的轨迹。利用这一界限,我们发现了一个与时间无关的确定波数,可以改善Cheskidov和Dai (Phys D Nonlinear Phenom 376 - 377:204 - 215,2018)中获得的估计。这种经典方法更为直接,但它依赖于吸收集的存在。
A time-dependent determining wavenumber was introduced in Cheskidov and Dai (Phys D Nonlinear Phenom 376–377:204–215, 2018) to estimate the number of determining modes for the surface quasi-geostrophic equation. In this paper we continue this investigation focusing on the subcritical case and study trajectories inside an absorbing set bounded in. Utilizing this bound we find a time-independent determining wavenumber that improves the estimate obtained in Cheskidov and Dai (Phys D Nonlinear Phenom 376–377:204–215, 2018). This classical approach is more direct, but it is contingent on the existence of theabsorbing set.
DOI: --
发表时间: 2012
期刊: --
影响因子: --
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