نتایج جستجو برای: interior point methods

تعداد نتایج: 2323873  

1997
Calvin A. Johnson Ariela Sofer

Interior-point methods possess strong theoretical properties and have been successfully applied to a wide variety of linear and nonlinear programming applications. This paper presents a class of algorithms, based on interior-point methodology, for performing regularized maximum likelihood reconstructions on 3-D emission tomography data. The algorithms solve a sequence of subproblems that conver...

2000
Jonathan F. Bard

All forms of the simplex method reach the optimum by traversing a series of basic solutions. Since each basic solution represents an extreme point of the feasible region, the track followed by the algorithm moves around the boundary of the feasible region. In the worst case, it may be necessary to examine most if not all of the extreme points. This can be cripplingly inefficient given that the ...

2006
Tim Rees

We investigate a preconditioning technique applied to the problem of solving linear systems arising from primal-dual interior point algorithms in linear and quadratic programming. The preconditioner has the attractive property of improved eigenvalue clustering with increased ill-conditioning of the (1, 1) block of the saddle point matrix. We demonstrate performance of the preconditioner on prob...

2012
Carla T. L. S. Ghidini Aurelio R. L. Oliveira Jair Silva

Carla T. L. S. Ghidini, Aurelio R. L. Oliveira, Jair Silva Institute of Mathematics, Statistics and Scientific of Computation (IMECC), State University of Campinas (UNICAMP), São Paulo, Brazil Federal University of Mato Grosso do Sul (UFMS), Mato Grosso do Sul, Brazil E-mail: {carla, aurelio}@ime.unicamp.br, [email protected] Received September 15, 2011; revised October 16, 2011; accepted Octobe...

پایان نامه :0 1374

the rationale behind the present study is that particular learning strategies produce more effective results when applied together. the present study tried to investigate the efficiency of the semantic-context strategy alone with a technique called, keyword method. to clarify the point, the current study seeked to find answer to the following question: are the keyword and semantic-context metho...

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