Now showing items 1-20 of 31

    • Allocation Strategies in Hub Networks 

      Yaman, H. (Elsevier, 2011-06-11)
      In this paper, we study allocation strategies and their effects on total routing costs in hub networks. Given a set of nodes with pairwise traffic demands, the p-hub median problem is the problem of choosing p nodes as hub ...
    • A branch and cut algorithm for hub location problems with single assignment 

      Labbé, M.; Yaman, H.; Gourdin, E. (Springer, 2005)
      The hub location problem with single assignment is the problem of locating hubs and assigning the terminal nodes to hubs in order to minimize the cost of hub installation and the cost of routing the traffic in the network. ...
    • A branch-and-cut algorithm for the hub location and routing problem 

      Rodríguez-Martín, I.; Salazar-González, J-J.; Yaman, H. (Elsevier, 2014)
      We study the hub location and routing problem where we decide on the location of hubs, the allocation of nodes to hubs, and the routing among the nodes allocated to the same hubs, with the aim of minimizing the total ...
    • A capacitated hub location problem under hose demand uncertainty 

      Meraklı, M.; Yaman, H. (Elsevier, 2017)
      In this study, we consider a capacitated multiple allocation hub location problem with hose demand uncertainty. Since the routing cost is a function of demand and capacity constraints are imposed on hubs, demand uncertainty ...
    • The design of single allocation incomplete hub networks 

      Alumur, S. A.; Kara, B. Y.; Karasan, O. E. (Elsevier, 2009)
      The hub location problem deals with finding the location of hub facilities and allocating the demand nodes to these hub facilities so as to effectively route the demand between any origin-destination pair. In the extensive ...
    • Efficient simulated annealing based solution approaches to the competitive single and multiple allocation hub location problems 

      Ghaffarinasab, N.; Motallebzadeh, A.; Jabarzadeh, Y.; Kara, B. Y. (Elsevier, 2018)
      Hub location problems (HLPs) constitute an important class of problems in logistics with numerous applications in passenger/cargo transportation, postal services, telecommunications, etc. This paper addresses the competitive ...
    • Endogenous effects of hubbing on flow intensities 

      Taner, M. R.; Kara, B. Y. (Springer, 2016)
      Location of hub facilities and the allocation decisions in transport networks endogenously affect both the flow intensities and the transportation costs. Since the introduction of the hub location problem to the operations ...
    • The hierarchical hub median problem with single assignment 

      Yaman, H. (Elsevier, 2009)
      We study the problem of designing a three level hub network where the top level consists of a complete network connecting the so-called central hubs and the second and third levels are unions of star networks connecting ...
    • Hierarchical multimodal hub location problem with time-definite deliveries 

      Alumur, S. A.; Yaman, H.; Kara, B. Y. (Elsevier, 2012)
      Hierarchical multimodal hub location problem is a cost-minimizing hub covering problem where two types of hubs and hub links, accounting for ground and air transportation, are to be established, while ensuring time-definite ...
    • A hub covering network design problem for cargo applications in Turkey 

      Alumur, S.; Kara, B. Y. (Palgrave Macmillan, 2009)
      Hub location problems involve locating hub facilities and allocating demand nodes to hubs in order to provide service between origin-destination pairs. In this study, we focus on cargo applications of the hub location ...
    • Hub location and Hub network design 

      Alumur, Sibel Alev (Bilkent University, 2009)
      he hub location problem deals with finding the location of hub facilities and allocating the demand nodes to these hub facilities so as to effectively route the demand between origin–destination pairs. Hub location ...
    • Hub location and routing problem 

      Bayraktar, Sinan (Bilkent University, 2016-01)
      Hubs are special facilities that consolidate and disseminate ows in many-to-many distribution systems. The hub location problem aims to nd locations of hubs and allocate non-hub nodes directly to the hubs. However, ...
    • Hub location proplems under polyhedral demand uncertainty 

      Meraklı, Merve (Bilkent University, 2015-07)
      Hubs are points of consolidation and transshipment in many-to-many distribution systems that bene t from economies of scale. In hub location problems, the aim is to locate hub facilities such that each pairwise demand ...
    • Hub location under competition 

      Mahmutoğulları, Ali İrfan (Bilkent University, 2013)
      Hubs are consolidation and dissemination points in many-to-many flow networks. The hub location problem is to locate hubs among available nodes and allocate non-hub nodes to these hubs. The mainstream hub location studies ...
    • Hub location under competition 

      Mahmutogullari, A. I.; Kara, B. Y. (Elsevier, 2016)
      Hubs are consolidation and dissemination points in many-to-many flow networks. Hub location problem is to locate hubs among available nodes and allocate non-hub nodes to these hubs. The mainstream hub location studies ...
    • The latest arrival hub location problem for cargo delivery systems with stopovers 

      Yaman, H.; Kara, B. Y.; Tansel, B. C. (Elsevier, 2007)
      In this paper, we concentrate on the service structure of ground-transportation based cargo delivery companies. The transient times that arise from nonsimultaneous arrivals at hubs (typically spent for unloading, loading, ...
    • Multimodal hub location and hub network design 

      Alumur, S. A.; Kara, B. Y.; Karasan O. E. (2012)
      Through observations from real life hub networks, we introduce the multimodal hub location and hub network design problem. We approach the hub location problem from a network design perspective. In addition to the location ...
    • Network hub location problems: The state of the art 

      Alumur, S.; Kara, B. Y. (Elsevier, 2008)
      Hubs are special facilities that serve as switching, transshipment and sorting points in many-to-many distribution systems. The hub location problem is concerned with locating hub facilities and allocating demand nodes to ...
    • On the single-assignment p-hub center problem 

      Kara, B. Y.; Tansel, B. Ç. (Elsevier, 2000)
      We study the computational aspects of the single-assignment p-hub center problem on the basis of a basic model and a new model. The new model's performance is substantially better in CPU time than different linearizations ...
    • p-hub median problem for non-complete networks 

      Akgün, İ.; Tansel, B. Ç. (Elsevier, 2018)
      Most hub location studies in the literature use a complete-network structure as an input in developing optimization models. This starting point is not necessarily from assuming that the underlying real-world network (e.g., ...