共查询到20条相似文献,搜索用时 4 毫秒
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Giannakis Dimitrios Ourmazd Abbas Slawinska Joanna Zhao Zhizhen 《Journal of Nonlinear Science》2019,29(5):2385-2445
Journal of Nonlinear Science - We present a data-driven framework for extracting complex spatiotemporal patterns generated by ergodic dynamical systems. Our approach, called vector-valued spectral... 相似文献
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For an arbitrary net of mappings defined on subsets of the Hausdorff space (X, ) and acting into a vector topological space (Y, ) semiordered by a solid cone , we introduce the notion of V-limit. We investigate topological and sequential properties of V-limit mappings and establish sufficient conditions for their existence. The results presented can be used as a basis for the procedure of averaging of problems of vector optimization. 相似文献
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Annals of Global Analysis and Geometry - 相似文献
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MATTHEW S. BOTHNER RICHARD HAYNES WONJAE LEE EDWARD BISHOP SMITH 《The Journal of mathematical sociology》2013,37(2):80-114
Two key problems in the study of longitudinal networks are determining when to chunk continuous time data into discrete time periods for network analysis and identifying periodicity in the data. In addition, statistical process control applied to longitudinal social network measures can be biased by the effects of relational dependence and periodicity in the data. Thus, the detection of change is often obscured by random noise. Fourier analysis is used to determine statistically significant periodic frequencies in longitudinal network data. Two approaches are then offered: using significant periods as a basis to chunk data for longitudinal network analysis or using the significant periods to filter the longitudinal data. E-mail communication collected at the United States Military Academy is examined. 相似文献
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离散超小波变换下双正交小波谱分析 总被引:5,自引:0,他引:5
在离散超小波交换下,双正交小波交换矩阵的谱是有界的,我们给出一个确定的界.任何一个双正交小波变换矩阵的谱不可能分布在1附近的某个开区间内,我们给出该区间估计,从而证明了任何一个双正交小波族变换矩阵的谱不可能无限接近于1(正交小波交换矩阵的谱). 相似文献
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Journal of Optimization Theory and Applications - In this article, Algorithm 1 was duplicated instead of Algorithm 2. 相似文献
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Advances in Data Analysis and Classification - A Correction to this paper has been published: 10.1007/s11634-022-00503-9 相似文献
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Numerical Algorithms - The first equation in Eq. (2.9) should read 相似文献
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Siberian Mathematical Journal - 相似文献
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In this work we will address the problem of finding spectral values and bases for the corresponding spectral subspaces for a bounded operator on a Banach space. We will make a bridge between the spectral problem for the continuous operator and the computation of the eigenpairs of a matrix. This approximate problem results first from an approximation by a sequence of continuous operators with finite rank, followed by the reduction to a spectral problem for an operator whose domain as well as range are finite dimensional. Some discussion on defect correction procedures will be also presented. (© 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) 相似文献
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Skorokhodov S. L. Kuzmina N. P. 《Computational Mathematics and Mathematical Physics》2019,59(5):815-835
Computational Mathematics and Mathematical Physics - A method for analysis of the evolution equation of potential vorticity in the quasi-geostrophic approximation with allowance for vertical... 相似文献
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S. N. Man’ko 《Russian Mathematics (Iz VUZ)》2018,62(3):34-44
This work is devoted to solving some classes of operator equations, based on the solution of auxiliary one-parameter family of equations, which is obtained fromthe original operator equation by formal replacement of the operator of the integrated parameter. Solutions are vector-valued functions represented by power series or integral. We investigate some properties of these solutions, namely, growth characteristics, the domain of analyticity. The investigation is realized by means of order and type of operator, operator order and operator type of the vector relative to the operator. 相似文献
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We investigate the location and nature of the spectrum of thefourth-order self-adjoint equation (p0 y')'+(p1 y')'+qy=zwy subject to certain asymptotic assumptions on the coefficients.The main tools are the theory of asymptotic integration andthe TitchmarshWeyl M-matrix. Asymptotic integration yieldsasymptotic formulae for the solutions of the differential equationwhich are then used to derive properties of the M-matrix. Thecharacterisation of spectral properties in terms of the boundarybehaviour of M leads to the desired results. 相似文献
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Geometriae Dedicata - A Correction to this paper has been published: https://doi.org/10.1007/s10711-015-0119-z 相似文献
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Mathematical Programming - A Correction to this paper has been published: 10.1007/s10107-020-01587-x 相似文献