Results 171 to 180 of about 251 (211)

Thermomechanical Fatigue and Creep–Fatigue Interaction of Inconel 718 Additively Manufactured by Laser Beam Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth, Tomáš Babinský, Jan Lars Riedel, Wen Hao Kan, Aijun Huang, Martin Heilmaier, Ivo Šulák   +6 more
wiley   +1 more source

Ill-conditioned matrices in linear programming

Metrika, 1963
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Optimal Conditioning of Bernstein Collocation Matrices

SIAM Journal on Matrix Analysis and Applications, 2010
Some results on the optimal conditioning of the collocation matrices of the Bernstein basis are provided. Numerical examples illustrate the results.
Juan Manuel Pena, Jorge Delgado
exaly   +2 more sources

Matrices, Norms and Conditioning

Problem Books in Mathematics, 2014
To measure the size of vector and matrices we use norms. In this chapter, we introduce and study three vector norms and define and use the corresponding matrix norms. One of the goals is to estimate a bound on the error in the solution \(\boldsymbol{x}\) of a linear system \(\boldsymbol{A}\boldsymbol{x} = \boldsymbol{b}\) when there exists an ...
Jean-Louis Merrien, Lyche Tom, Merrien Jean-Louis   +2 more
exaly   +2 more sources

On Pre-Conditioning of Matrices

Journal of the ACM, 1960
exaly   +3 more sources

On pre-conditioning matrices

Preprints of papers presented at the 14th national meeting of the Association for Computing Machinery on - ACM '59, 1959
exaly   +4 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
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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
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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
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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