نتایج جستجو برای: steps the polak
تعداد نتایج: 16057237 فیلتر نتایج به سال:
A simple scheme is proposed for handling nonlinear equality constraints in the context of a previously introduced sequential quadratic programming (SQP) algorithm for inequality constrained problems, generating iterates satisfying the constraints. The key is an idea due to Mayne and Polak (Math. Progr., vol. 11, pp. 67{80, 1976) by which nonlinear equality constraints are treated as \"-type con...
Using search directions of a recent class of three--term conjugate gradient methods, modified versions of the Hestenes-Stiefel and Polak-Ribiere-Polyak methods are proposed which satisfy the sufficient descent condition. The methods are shown to be globally convergent when the line search fulfills the (strong) Wolfe conditions. Numerical experiments are done on a set of CUTEr unconstrained opti...
Thorkild I. A. Sørensen, Philippe Boutin, Moira A. Taylor, Lesli H. Larsen, Camilla Verdich, Liselotte Petersen, Claus Holst, Søren M. Echwald, Christian Dina, Søren Toubro, Martin Petersen, Jan Polak, Karine Clément, J. Alfredo Martı́nez, Dominique Langin, Jean-Michel Oppert, Vladimir Stich, Ian Macdonald, Peter Arner, Wim H. M Saris, Oluf Pedersen, Arne Astrup, Philippe Froguel, The NUGENOB Co...
In this study the relationship between choosing appropriate descriptors by genetic algorithm to the Polarizability (POL), Molar Refractivity (MR) and Octanol/water Partition Coefficient (LogP) of barbiturates is studied. The chemical structures of the molecules were optimized using ab initio 6-31G basis set method and Polak-Ribiere algorithm with conjugated gradient within HyperChem 8.0 environ...
We propose two algorithms for nonconvex unconstrained optimization problems that employ Polak-Ribière-Polyak conjugate gradient formula and new inexact line search techniques. We show that the new algorithms converge globally if the function to be minimized has Lipschitz continuous gradients. Preliminary numerical results show that the proposed methods for particularly chosen line search condit...
This introduces the symposium on judgment aggregation. The theory of judgment aggregation asks how several individualsjudgments on some logically connected propositions can be aggregated into consistent collective judgments. The aim of this introduction is to show how ideas from the familiar theory of preference aggregation can be extended to this more general case. We rst translate a proof o...
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