Results 91 to 100 of about 289 (157)

Improvement of Incomplete Factorizations by a Sparse Secant Method.

open access: yes, 1990
In the present paper, the improvement of an incomplete factorization of a non-symmetric matrix A is discussed. Starting from the ideas of sparsity preserving quasi-Newton methods, an algorithm is developed which improves the approximation of A by the ...
Walter, Artur
core  

Extrapolation Techniques For Constructing Higher Order Finite Element Methods

open access: yes, 1993
. The p-version of the finite element methods requires the exact calculation of the stiffness matrix by a special form of numerical integration. As an alternative to classical techniques that are based on Gauß quadrature, we propose to use low order ...
U. R Ude, U. Rüde
core  

DIRECT MEDICAL IMAGE TO SIMULATION USING AUTO-SEGMENTATION AND POINT CLOUD-BASED CFD. [PDF]

open access: yesAdv Comput Sci Eng
Corpuz AM   +5 more
europepmc   +1 more source

An analysis of the TDNNS method using natural norms. [PDF]

open access: yesNumer Math (Heidelb), 2018
Pechstein AS, Schöberl J.
europepmc   +1 more source

An Adaptive Two-Level Method For The Coupling Of Nonlinear FEM-BEM Equations

open access: yes, 1999
. In this paper an a posteriori error estimate for nonlinear coupled FEM-BEM equations is derived by using hierarchical basis techniques. Based on the properties of two-level additive Schwarz operators for (linearized) differential equations and weakly ...
Patrick Mund   +3 more
core  

Serendipity discrete complexes with enhanced regularity. [PDF]

open access: yesCalcolo
Di Pietro DA, Hanot M, Salah M, Salah M.
europepmc   +1 more source

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