Results 21 to 30 of about 66 (52)

Solving Linear Inequalities In A Least Squares Sense

open access: yes, 1994
. In 1980, Han [6] described a finitely terminating algorithm for solving a system Ax b of linear inequalities in a least squares sense. The algorithm uses a singular value decomposition of a submatrix of A on each iteration, making it impractical for ...
R. Bramley, B. Winnicka
core  

A preconditioned Krylov subspace method for the solution of least squares problems

open access: yes, 1994
We present an iterative method of preconditioned Krylov type for the solution of large least squares problems. We prove that the method is robust and investigate its rate of convergence.
Gérard C. Herman   +2 more
core  

HILBERT-SPACE TECHNIQUES FOR SPECTRAL REPRESENTATION IN TERMS OF OVERCOMPLETE BASES

open access: yes, 2007
Topics associated with the representation of objects from a separable Hilbert space in terms of an a priori given overcomplete system (dictionary) of its generators (atoms) are handled. First the procedure of nding such a representation is formulated and
Vtzslav Vesel
core  

Communication Avoiding Rank Revealing QR Factorization with Column Pivoting

open access: yes, 2013
. In this paper we introduce CARRQR, a communication avoiding rank revealing QR factorization with tournament pivoting. We show that CARRQR reveals the numerical rank of a matrix in an analogous way to QR factorization with column pivoting (QRCP ...
Laura Grigori   +3 more
core  

A CHARACTERIZATION OF MAPPING UNSTRUCTURED GRIDS ONTO STRUCTURED GRIDS AND USING MULTIGRID AS A PRECONDITIONER

open access: yes, 1997
Many problems based on unstructured grids provide a natural multigrid framework due to using an adaptive gridding procedure. When the grids are saved, even starting from just a ne grid problem poses no serious theoretical di culties in applying multigrid.
Sachit Malhotra   +2 more
core  

ESTIMATING THE CONSUMPTION MATRIX FROM INEXACT DATA IN THE LEONTIEF MODEL

open access: yes, 2008
. The Leontief model, originally developed for describing an economic system in terms of mutually interrelated and structurally conditioned simultaneous flows of commodities and services, has important applications to wide ranging disciplines.
Moody   +4 more
core  

Credit and Loan Approval Classification Using a Bio-Inspired Neural Network. [PDF]

open access: yesBiomimetics (Basel)
Mourtas SD   +3 more
europepmc   +1 more source

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