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Displaying 261 – 280 of 303

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The determination of necessary and sufficient conditions for the existence of a solution to the 3 × 3 × 3 multi-index problem

Graham Smith, Jeremy Dawson (1979)

Aplikace matematiky

Modifications to a procedure for determining necessary and sufficient conditions for the existence of a solution to the multi-index problem are described. These modifications reduce the computation required to such an extent that necessary and sufficient conditions for the existence of a solution to the 3x3x3 multi-index problem can now be determined. These conditions are given in this paper.

The linear programming approach to deterministic optimal control problems

Daniel Hernández-Hernández, Onésimo Hernández-Lerma, Michael Taksar (1996)

Applicationes Mathematicae

Given a deterministic optimal control problem (OCP) with value function, say J * , we introduce a linear program ( P ) and its dual ( P * ) whose values satisfy sup ( P * ) inf ( P ) J * ( t , x ) . Then we give conditions under which (i) there is no duality gap

The single (and multi) item profit maximizing capacitated lot–size (PCLSP) problem with fixed prices and no set–up

Kjetil K. Haugen, Asmund Olstad, Krystsina Bakhrankova, Erik Van Eikenhorst (2010)

Kybernetika

This paper proposes a specialized LP-algorithm for a sub problem arising in simple Profit maximising Lot-sizing. The setting involves a single (and multi) item production system with negligible set-up costs/times and limited production capacity. The producer faces a monopolistic market with given time-varying linear demand curves.

Una generalización de la caracterización de puntos extremos.

Juan García Laguna (1991)

Trabajos de Investigación Operativa

En este artículo se obtiene una generalización de la caracterización de los puntos extremos en el poliedro de soluciones factibles del problema estándar de la Programación Lineal. Para ello se usa una extensión del concepto de cara dado por Goldman y Tucker para conos convexos poliédricos que difiere del expuesto en la mayoría de los tratados clásicos (Grünbaum, Mullen-Shepard, Stoer-Witzgall, ...).

Une approche hybride pour le sac à dos multidimensionnel en variables 0–1

Michel Vasquez, Jin-Kao Hao (2001)

RAIRO - Operations Research - Recherche Opérationnelle

Nous présentons, dans cet article, une approche hybride pour la résolution du sac à dos multidimensionnel en variables 0–1. Cette approche combine la programmation linéaire et la méthode tabou. L’algorithme ainsi obtenu améliore de manière significative les meilleurs résultats connus sur des instances jugées difficiles.

Une approche hybride pour le sac à dos multidimensionnel en variables 0–1

Michel Vasquez, Jin-Kao Hao (2010)

RAIRO - Operations Research

We present, in this article, a hybrid approach for solving the 0–1 multidimensional knapsack problem (MKP). This approach combines linear programming and Tabu search. The resulting algorithm improves on the best result on many well-known hard benchmarks.

Currently displaying 261 – 280 of 303