Now showing items 1-7 of 7

    • Comparison of the formulations for a hub-and-spoke network design problem under congestion 

      Kian R.; Kargar K. (Elsevier, 2016)
      In this paper, we study the hub location problem with a power-law congestion cost and propose an exact solution approach. We formulate this problem in a conic quadratic form and use a strengthening method which rests on ...
    • Coordination of staffing and pricing decisions in a service firm 

      Serel, D. A.; Erel, E. (John Wiley & Sons, 2008)
      Customer demand is sensitive to the price paid for the service in many service environments. Using queueing theory framework, we develop profit maximization models for jointly determining the price and the staffing level ...
    • An evaluative study of operation grouping policies in an FMS 

      Sabuncuoǧlu, İ.; Lahmar, M. (Kluwer Academic Publishers, 2003)
      The increased use of flexible manufacturing systems to provide customers with diversified products efficiently has created a significant set of operational challenges for managers. This technology poses a number of decision ...
    • Huber approximation for the non-linear ℓ1 problem 

      Pınar, M. Ç.; Hartmann, W. M. (Elsevier, 2006)
      The smooth Huber approximation to the non-linear ℓ1 problem was proposed by Tishler and Zang (1982), and further developed in Yang (1995). In the present paper, we use the ideas of Gould (1989) to give a new algorithm with ...
    • A Kuznets curve in environmental efficiency: an application on OECD countries 

      Zaim, O.; Taskin, F. (Springer Netherlands, 2000)
      The role of the environment is an important issue in policy making and the accurate assessment of the environmental conditions is vital. In this paper, using nonparametric techniques, an environmental efficiency index is ...
    • Scaling forecasting algorithms using clustered modeling 

      Gür, İ.; Güvercin, M.; Ferhatosmanoglu, H. (Association for Computing Machinery, 2015)
      Research on forecasting has traditionally focused on building more accurate statistical models for a given time series. The models are mostly applied to limited data due to efficiency and scalability problems. However, ...
    • Trajectory control of a quadrotor using a control allocation approach 

      Zaki, H.; Unel, M.; Yildiz, Y. (IEEE (Institute of Electrical and Electronics Engineers), 2017)
      A quadrotor is an underactuated unmanned aerial vehicle with four inputs to control the dynamics. Trajectory control of a quadrotor is a challenging task and usually tackled in a hierarchical framework where desired/reference ...