Ara es mostren els items 1-20 de 26

  • A biased random-key genetic algorithm for the capacitated minimum spanning tree problem 

    Ruiz Ruiz, Hector Efrain; Albareda Sambola, Maria; Fernández Aréizaga, Elena; Resende, Mauricio G. C. (2015-05)
    Article
    Accés restringit per política de l'editorial
    This paper focuses on the capacitated minimum spanning tree(CMST)problem.Given a central processor and a set of remote terminals with specified demands for traffic that must flow between the central processor and terminals,the ...
  • A flow formulation for the optimum communication spanning tree 

    Fernández Aréizaga, Elena; Luna Mota, Carlos; Hildenbrandt, Achim; Reinelt, Gerard; Wiesberg, Stefan (Universidad de La Laguna, 2013)
    Text en actes de congrés
    Accés obert
    In this paper we address the Optimum Communication Spanning Tree Problem. We present a formulation that uses three index variables and we propose several families of inequalities, which can be used to reinforce the ...
  • A novel model for arc territory design: promoting Eulerian districts 

    Garcia Ayala, Gariela; González Velarde, José Luis; Rios Mercados, Roger; Fernández Aréizaga, Elena (2015-01-01)
    Article
    Accés obert
    The problem of district design for the implementation of arc routing activities is addressed. The aim is to partition a road network into a given number of sectors to facilitate the organization of the operations to be ...
  • An evaluation of urban consolidation centers through continuous analysis with non-equal market share companies 

    Roca Riu, Mireia; Estrada Romeu, Miguel Ángel; Fernández Aréizaga, Elena (2015)
    Text en actes de congrés
    Accés obert
    This paper analyzes the logistic cost savings caused by the implementation of Urban Consolidation Centers (UCC) in a dense area of a city. In these urban terminals, freight flows from interurban carriers are consolidated ...
  • Diseño de rutas de recogida de residuos sólidos urbanos en el área metropolitana de Barcelona 

    Bautista Valhondo, Joaquín; Pereira Gude, Jordi; Fernández Aréizaga, Elena (Universidad de La Laguna. Servicio de Publicaciones, 2006)
    Text en actes de congrés
    Accés obert
    Los problemas aso ciados a la recogida de residuos sólidos urbanos son muy variados. En este traba jo se presenta el problema de diseño de itinerarios de recogida y se muestran los resultados ofrecidos p or un pro cedimiento ...
  • Fix-and-relax-coordination for a multi-period location-allocation problem under uncertainty 

    Albareda Sambola, Maria; Alonso Ayuso, Antonio; Escudero Bueno, Laureano; Fernández Aréizaga, Elena; Pizarro Romero, Celeste (2013-12)
    Article
    Accés restringit per política de l'editorial
    A multi-period discrete facility location problem is introduced for a risk neutral strategy with uncertainty in the costs and some of the requirements along the planning horizon. A compact 0–1 formulation for the Deterministic ...
  • Fixed-charge facility location problems in location science 

    Fernández Aréizaga, Elena; Landete, Mercedes (Springer, 2015-01-21)
    Capítol de llibre
    Accés restringit per política de l'editorial
    Fixed-Charge Facility Location Problems are among core problems in Location Science. There is a finite set of users with demand of service and a finite set of potential locations for the facilities that will offer service ...
  • General network design : a unified view of combined location and network design problems 

    Contreras Aguilar, Iván; Fernández Aréizaga, Elena (Elsevier, 2011-06-16)
    Article
    Accés restringit per política de l'editorial
    This paper presents a unified framework for the general network design problem which encompasses several classical problems involving combined location and network design decisions. In some of these problems the service ...
  • GEVA: geometric variability-based approaches for identifying patterns in data 

    Irigoien, I.; Arenas, Concepción; Fernández Aréizaga, Elena; Mestres, Francisco (2009-10-15)
    Article
    Accés restringit per política de l'editorial
    This paper, arising from population studies, develops clustering algorithms for identifying patterns in data. Based on the concept of geometric variability, we have developed one polythetic-divisive and three agglomerative ...
  • Heurísticas, planos secantes y optimización subgradiente para set partitioning 

    Barceló Bugeda, Jaime; Fernández Aréizaga, Elena (Universitat Politècnica de Barcelona. Centre de Càlcul, 1988)
    Article
    Accés obert
    En este artículo se estudian los problemas de Set Partitioning (SP) desde una perspectiva algorítmica. El diseño de un procedimiento heurístico permite no sólo disponer de soluciones posibles para los mismos, sino también ...
  • Hiperheurística para un problema de equilibrado de líneas de montaje usando Scatter Search 

    Bautista Valhondo, Joaquín; Fernández Aréizaga, Elena; González, JL; Laguna, Manuel (2005)
    Text en actes de congrés
    Accés obert
    El presente trabajo se centra en la aplicación de un procedimiento basado en Scatter Search (SS) para resolver un problema de equilibrado de líneas de montaje. Tras una intr oducción a los denominados Assembly Line ...
  • Hub network design problems with profits 

    Alibeyg, Armaghan; Contreras Aguilar, Ivan; Fernández Aréizaga, Elena (2016-12-01)
    Article
    Accés restringit per política de l'editorial
    This paper presents a class of hub network design problems with profit-oriented objectives, which extend several families of classical hub location problems. Potential applications arise in the design of air and ground ...
  • Lagrangean bounds for the optimum communication spanning tree problem 

    Contreras, I.; Fernández Aréizaga, Elena; Marín, Alfredo (Springer Verlag, 2010)
    Article
    Accés restringit per política de l'editorial
    This paper considers the Optimum Communication Spanning Tree Problem. An integer programming formulation that yields tight LP bounds is proposed. Given that the computational effort required to obtain the LP bounds ...
  • Lagrangean Duals and Exact Solution to the Capacitated p-Center Problem 

    Albareda Sambola, Maria; Díaz, Juan A.; Fernández Aréizaga, Elena (2006-06-12)
    Article
    Accés obert
    In this work we study the Capacitated p-Center Problem (CpCP) and we propose an exact algorithm to solve it. We study two auxiliary problems and their relation to CpCP, and we propose two different Lagrangean duals based ...
  • Minimizing the maximum travel time in a combined model of facility location and network design 

    Contreras Aguilar, Iván; Fernández Aréizaga, Elena; Reineltc, Gerhard (2012-12)
    Article
    Accés restringit per política de l'editorial
    This paper presents a combined Facility Location/Network Design Problem which simultaneously considers the location of facilities and the design of its underlying network so as to minimize the maximum customer-facility ...
  • Multiperiod location-routing with decoupled time scales 

    Albareda Sambola, Maria; Fernández Aréizaga, Elena; Nickel, Stefan (Elsevier, 2012-03-01)
    Article
    Accés restringit per política de l'editorial
    This paper focuses on a multiperiod discrete facility location problem where transportation costs are considered together with location costs to design the operating facility pattern along a time horizon. The problem ...
  • On the collaboration uncapacitated arc routing problem 

    Fernández Aréizaga, Elena; Fontana, Dario; Speranza, M. Grazia (2016-03-01)
    Article
    Accés restringit per política de l'editorial
    This paper introduces a new arc routing problem for the optimization of a collaboration scheme among carriers. This yields to the study of a profitable uncapacitated arc routing problem with multiple depots, where carriers ...
  • On the generalitzed arc routing problem 

    Fernández Aréizaga, Elena (2013)
    Text en actes de congrés
    Accés obert
  • Parking slot assignment for urban distribution: models and formulations 

    Roca Riu, Mireia; Fernández Aréizaga, Elena; Estrada Romeu, Miguel Ángel (2015-05-07)
    Article
    Accés restringit per política de l'editorial
    A key element to enhance urban distribution is the adequate management of parking space, particularly for loading and unloading operations. An in-advance booking system able to be adjusted to users needs can be a very ...
  • Problemas de Knapsack 0-1 con una restricción adicional 

    Barceló Bugeda, Jaime; Fernández Aréizaga, Elena (Universitat Politècnica de Barcelona. Centre de Càlcul, 1988)
    Article
    Accés obert
    En este artículo se estudian los problemas de Knapsack con una restricción adicional. Este estudio viene motivado por la aparición de problemas con esta estructura en la formulación de distintas relajaciones lagrangianas ...