نتایج جستجو برای: multiple eigenvalues

تعداد نتایج: 776810  

Journal: :journal of the structural engineering and geotechnics 0
l shahryari science and research branch, islamic azad university, fars, iran

this paper consists of three sections. in the first section an efficient method is used for decomposition of the canonical matrices associated with repetitive structures. to this end, cylindrical coordinate system, as well as a special numbering scheme were employed. in the second section, divide and conquer method have been used for eigensolution of these structures, where the matrices are in ...

Journal: :iranian journal of science and technology (sciences) 2014
m. sanjaranipour

in this paper, the deformation of a thick-walled circular cylindrical shell of incompressible isotropic elastic material is considered. the shell, which is made of three-term strain energy function is subjected to the combined external and axial loading pressure. in order to obtain the relevant eigenvalues, which is the main objective of the work, the incremental equilibrium equations are so...

Journal: :transactions on combinatorics 2013
pradeep g. bhat sabitha d'souza

‎let $g$ be a graph with vertex set $v(g)$ and edge set $x(g)$ and consider the set $a={0,1}$‎. ‎a mapping $l:v(g)longrightarrow a$ is called binary vertex labeling of $g$ and $l(v)$ is called the label of the vertex $v$ under $l$‎. ‎in this paper we introduce a new kind of graph energy for the binary labeled graph‎, ‎the labeled graph energy $e_{l}(g)$‎. ‎it depends on the underlying graph $g$...

اهری زاد, سعید, بهروز, پیمان, حاذق جعفری, پیام, محمدی, سید ابوالقاسم, نورمند موید, فرید,

In order to investigate of genetic diversity in sainfoin based on seed yield and related traits, 36 ecotypes including foreign and Iranian ecotypes, an experiment was conducted using a lattice design with two replications in researches station in Natural Resources and Agricultural Researches Center of East Azerbaijan province. Analysis of variance revealed significant genetic diversity among ec...

Journal: :transactions on combinatorics 2013
alireza abdollahi shahrooz janbaz mohammad reza oboudi

let $n$ be any positive integer and let $f_n$ be the friendship (or dutch windmill) graph with $2n+1$ vertices and $3n$ edges. here we study graphs with the same adjacency spectrum as the $f_n$. two graphs are called cospectral if the eigenvalues multiset of their adjacency matrices are the same. let $g$ be a graph cospectral with $f_n$. here we prove that if $g$ has no cycle of length $4$ or $...

2008
O. N. Kirillov Benjamin Franklin

We consider a gyroscopic system with two degrees of freedom under the action of small dissipative and non-conservative positional forces, which has its origin in the models of rotating bodies of revolution being in frictional contact. The spectrum of the unperturbed gyroscopic system forms a ”spectral mesh” in the plane ”frequency – gyroscopic parameter” with double semi-simple purely imaginary...

Journal: :international journal of civil engineering 0
a. kaveh m. najimi

in this paper, the rayleigh's quotient and the inverse vector iteration method are presented. the latter approach helps to obtain the natural frequencies and mode shapes of a structure. inverse vector iteration method with shifting enables to determine the higher modes. some basic theorems of linear algebra are presented and extended to study the free vibration of structures. the variation...

Journal: :Journal of Computational and Applied Mathematics 2023

We propose a verified computation method for eigenvalues in region and the corresponding eigenvectors of generalized Hermitian eigenvalue problems. The proposed uses complex moments to extract eigencomponents interest from random matrix Rayleigh$\unicode{x2013}$Ritz procedure project given problem into reduced problem. moment is by contour integral approximated using numerical quadrature. split...

Journal: :Proceedings of the American Mathematical Society 2022

In this paper, we obtain a comparison of Steklov eigenvalues and Laplacian on graphs discuss its rigidity. As applications the eigenvalues, Lichnerowicz-type estimates some combinatorial for graphs.

Functional data analysis is a relatively new and rapidly growing area of statistics. This is partly due to technological advancements which have made it possible to generate new types of data that are in the form of curves. Because the data are functions, they lie in function spaces, which are of infinite dimension. To analyse functional data, one way, which is widely used, is to employ princip...

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