Results 261 to 270 of about 16,280 (299)

On Pre-Conditioning of Matrices

Journal of the ACM, 1960
exaly   +3 more sources

Evaluation of several conditioning matrices for the management of radioactive metal beryllium wastes

Journal of Nuclear Materials, 2022
International audienceBeryllium wastes are produced by nuclear industry. One way to manage them is their encapsulation in cements. The main risk of this conditioning is the aqueous corrosion, which leads to the hydrogen production and cracks causing a ...
Celine Cannes, S Delpech
exaly   +2 more sources

The Ill-conditioning of infinite element stiffness matrices

Computers and Mathematics With Applications, 2001
In this paper, a method for improving the conditioning of infinite element stiffness matrices is proposed and examined for one-dimensional and two-dimensional infinite elements.
Safjan, A., Newman, M., A. Safjan, M. Newman   +3 more
exaly   +2 more sources

Optimal Conditioning of Matrices

SIAM Journal on Numerical Analysis, 1973
The optimal condition number c of a matrix S is the minimum, over all diagonal matrices D, of $\| {DS} \|\| {(DS)^{ - 1} } \|$. It arises in many applications of scaling in linear systems, and has been computed in the maximum norm by Bauer. In the $\ell _2 $-norm, we establish the inequalities $b \leqq c \leqq 2b$ and disprove—by an example of order ...
McCarthy, Charles, Strang, Gilbert
openaire   +2 more sources

Melnikov’s Conditions in Matrices

Journal of Dynamics and Differential Equations, 2019
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Qian, Weichao, Li, Yong, Yang, Xue
openaire   +1 more source

Sufficient conditions for H-matrices

International Journal of Computer Mathematics, 2005
In this article, several new simple criteria for nonsingular H-matrices are obtained by making use of elements of matrices only. A necessary condition for nonsingular H-matrices is also presented.
Tai-Bin Gan, Ting-Zhu Huang, David J. Evans 0001, Jian Gao   +3 more
openaire   +1 more source

Conditioning of structural stiffness matrices

Computers & Structures, 1997
Abstract The popularity of the stiffness method of structural analysis is due to its simplicity and amenability to a computer. In this method, special cut set basis, known as cocycle basis, is usually employed for constructing equilibrium equations.
A. Kaveh, I. Ghaderi
openaire   +1 more source

Optimally Conditioned Vandermonde-Like Matrices

SIAM Journal on Matrix Analysis and Applications, 2019
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Mykhailo Kuian, Lothar Reichel, Sergij V. Shiyanovskii   +2 more
openaire   +2 more sources

On the Condition of Symmetric Quasi-Definite Matrices

SIAM Journal on Matrix Analysis and Applications, 2000
Powerful algorithms and efficient data structures are developed for solving sparse positive definite systems of linear equations. A method of solving sparse (non-symmetric) systems is to first augment it to make it symmetric quasi-definite and then use available algorithms for symmetric systems.
Alan George, Khakim D. Ikramov
openaire   +2 more sources

Robustness of variograms and conditioning of kriging matrices

Journal of the International Association for Mathematical Geology, 1984
Current ideas of robustness in geostatistics concentrate upon estimation of the experimental variogram. However, predictive algorithms can be very sensitive to small perturbations in data or in the variogram model as well.
Phil Diamond, Armstrong Margaret
exaly   +2 more sources