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Two-mass dynamical system with singular stiffnes matrix
In this paper the solution of two-mass symmetric dynamical system with singular stiffnes matrix via the state space formulation is given. The coefficient matrix is non-diagonalizable. The terminology problems concerning eig...
BI - Akustika a kmity
- 2009 •
- D
Rok uplatnění
D - Stať ve sborníku
Two S-wave eigenvectors of the Christoffel matrix need not exist in anisotropic viscoelastic media
The 3x3x3x3 frequency-domain stiffness tensor is complex-valued in viscoelastic media. The 3 x 3 Christoffel matrix is then also complex-valued. Using a simple example, we demonstrate that a complex-valued Christoffel matrix
Earth and related environmental sciences
- 2021 •
- Jimp •
- Link
Rok uplatnění
Jimp - Článek v periodiku v databázi Web of Science
Výsledek na webu
Interval matrices: Regularity generates singularity
It is proved that regularity of an interval matrix implies singularity of four related interval matrices. The result is used to prove that for each nonsingular point matrix A, either A or A^-1 can be brought to a singul...
Applied mathematics
- 2018 •
- Jimp •
- Link
Rok uplatnění
Jimp - Článek v periodiku v databázi Web of Science
Výsledek na webu
Singularity-free stiff fluid cosmologies
BE - Teoretická fyzika
- 1995 •
- Jx
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
Rotationally invariant viscoelastic medium with a non-symmetric stiffness matrix
The stiffness matrix of a viscoelastic medium is symmetric in the low-frequency-symmetric stiffness matrix in this paper. We determine the general form of a rotationally invariant non-symmetric stiffness <...
Earth and related environmental sciences
- 2022 •
- Jimp •
- Link
Rok uplatnění
Jimp - Článek v periodiku v databázi Web of Science
Výsledek na webu
Derivation of stiffness matrix for tube element with respect to large displacements
Considering large displacements stiffness matrix for tube element is derived.
BI - Akustika a kmity
- 2004 •
- D
Rok uplatnění
D - Stať ve sborníku
Total FETI method and singular matrices in engineering problems
of the stiffness matrix A of a subdomain and an effective evaluation of the actionScalable implementation of FETI methods applied to engineering problems requires an efficient application of a direct method for solving a system of ...
BA - Obecná matematika
- 2012 •
- D
Rok uplatnění
D - Stať ve sborníku
Singularities in measurement in traverse
Modelling of geodetical problems can leads to singular models. A design matrix has not full column rank or a covariance matrix is only positive semidefinite. A problem of estimability of mean value parameters is considered....
BA - Obecná matematika
- 2007 •
- D
Rok uplatnění
D - Stať ve sborníku
Representation theorem for viscoelastic waves with a non-symmetric stiffness matrix
In an elastic medium, it was proved that the stiffness tensor is symmetric with respect to the exchange of the first pair of indices and the second pair of indices, cijkl = cklij . The 6x6 stiffness matrix is thus symmetric...
Earth and related environmental sciences
- 2018 •
- O
Rok uplatnění
O - Ostatní výsledky
One singular multivariate linear model with nuisance parameters
The singular multivariate linear model in which the matrix of the first order parameters is divided into two parts: to the matrix of the useful parameters and to the matrix of the nuisance parameters is considered....
BA - Obecná matematika
- 2005 •
- Jx
Rok uplatnění
Jx - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
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