Results 61 to 70 of about 197,517 (218)

Simultaneous eigenstates of the number-difference operator and a bilinear interaction Hamiltonian derived by solving a complex differential equation

open access: yes, 2005
As a continuum work of Bhaumik et al who derived the common eigenvector of the number-difference operator Q and pair-annihilation operator ab (J. Phys.
Erdèlyi A.   +3 more
core   +1 more source

OPTIMIZATION OF 3D LOCAL ORIENTATION MAP CALCULATION IN THE MATLAB FRAMEWORK

open access: yesInformatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska, 2015
This paper presents the development and evaluation of a new approach toward the optimization of 3D local orientation map calculation in the Matlab framework. This new approach can be detailed as: optimize eigenvector calculation for PCA analysis of X-ray
Ranya Al Darwich, Laurent Babout
doaj   +1 more source

An Exact Method for Calculating the Eigenvector Sensitivities

open access: yesApplied Sciences, 2020
Eigenvector sensitivities are often used in many engineering problems such as structural vibration control, optimization design, model updating and damage identification. So far, modal superposition method and Nelson’s method are the two main methods for
Qiuwei Yang, Xi Peng
doaj   +1 more source

Estimating network dimension when the spectrum struggles

open access: yesRoyal Society Open Science
What is the dimension of a network? Here, we view it as the smallest dimension of Euclidean space into which nodes can be embedded so that pairwise distances accurately reflect the connectivity structure.
Peter Grindrod   +2 more
doaj   +1 more source

State of art: utilizing social network analysis in diverse fields

open access: yesPublicaciones e Investigación, 2017
This paper shows an overview of the different concepts and techniques that are been used in social network analysis; also it shows new uses of SNA and different challenges that it is facing.In a first moment, it illustrates the way of representing the ...
Ibo Luis Cerra Escobar   +1 more
doaj   +1 more source

Eigenvector-based identification of bipartite subgraphs

open access: yes, 2018
We report our experiments in identifying large bipartite subgraphs of simple connected graphs which are based on the sign pattern of eigenvectors belonging to the extremal eigenvalues of different graph matrices: adjacency, signless Laplacian, Laplacian,
Paul, Debdas, Stevanovic, Dragan
core   +1 more source

Direction of Arrival Estimation Method Based on Eigenvalues and Eigenvectors for Coherent Signals in Impulsive Noise

open access: yesMathematics
In this paper, a Toeplitz construction method based on eigenvalues and eigenvectors is proposed to combine with traditional denoising algorithms, including fractional low-order moment (FLOM), phased fractional low-order moment (PFLOM), and correntropy ...
Junyan Cui, Wei Pan, Haipeng Wang
doaj   +1 more source

Reliable a-posteriori error estimators for $hp$-adaptive finite element approximations of eigenvalue/eigenvector problems [PDF]

open access: yes, 2011
We present reliable a-posteriori error estimates for $hp$-adaptive finite element approximations of eigenvalue/eigenvector problems. Starting from our earlier work on $h$ adaptive finite element approximations we show a way to obtain reliable and ...
Giani, Stefano   +2 more
core   +2 more sources

Localization of Eigenstates & Mean Wehrl Entropy

open access: yes, 1999
Dynamics of a periodically time dependent quantum system is reflected in the features of the eigenstates of the Floquet operator. Of the special importance are their localization properties quantitatively characterized by the eigenvector entropy, the ...
Arecchi   +35 more
core   +1 more source

The E-eigenvectors of tensors [PDF]

open access: yesLinear and Multilinear Algebra, 2013
17 ...
Liqun Qi, Shenglong Hu
openaire   +4 more sources

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