Spectral Analysis of One-Dimensional High-Contrast Elliptic Problems with Periodic Coefficients
Spectral Analysis of One-Dimensional High-Contrast Elliptic Problems with Periodic Coefficients
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具有周期系数的一维高对比度椭圆问题的谱分析
DOI:
10.1137/130947106
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发表时间:
2015
影响因子:
1.6
通讯作者:
Cherednichenko K
中科院分区:
文献类型:
--
作者:
Cherednichenko K
We study the behavior of the spectrum of a family of one-dimensional operators with periodic high-contrast coefficients as the period goes to zero, which may represent, e.g., the elastic or electromagnetic response of a two-component composite medium. Compared to the standard operators with moderate contrast, they exhibit a number of new effects due to the underlying nonuniform ellipticity of the family. The effective behavior of such media in the vanishing period limit also differs notably from that of multidimensional models investigated thus far by other authors, due to the fact that neither component of the composite forms a connected set. We then discuss a modified problem, where the equation coefficient is set to a positive constant on an interval that is independent of the period. Formal asymptotic analysis and numerical tests with finite elements suggest the existence of localized eigenfunctions (``defect modes''), whose eigenvalues are situated in the gaps of the limit spectrum for the unperturbed problem.
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DOI:
10.1070/im2002v066n02abeh000380
发表时间:
2002
期刊:
Izvestiya: Mathematics
影响因子:
--
作者:
V. Zhikov
通讯作者:
V. Zhikov
DOI:
--
发表时间:
2013
期刊:
影响因子:
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作者:
I. Kamotski;V. Smyshlyaev
通讯作者:
V. Smyshlyaev
影响因子:
2.4
作者:
S. Chandler;M. Lindner
通讯作者:
M. Lindner
DOI:
10.1016/s0021-7824(98)80068-8
发表时间:
1998-02-01
影响因子:
2.3
作者:
Allaire, G;Conca, C
通讯作者:
Conca, C
DOI:
--
发表时间:
2012
期刊:
影响因子:
--
作者:
S. Cooper
通讯作者:
S. Cooper