Ivan Contreras

Concordia University Research Chair in Transportation and Logistics Network Optimization
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Submitted Papers

Publications

  • C. Ortiz-Astorquiza, I. Contreras, G. Laporte, “Multilevel facility location problems”, European Journal of Operational Research , in press, 2017.

  • M. Tohidi, M. Kazemi Zanjani, I. Contreras, “Integrating Physician and Clinic Scheduling in Ambulatory Polyclinics”, Journal of the Operational Research Society , accepted 2017.

  • A. Alibeyg, I. Contreras, E. Fernández, “Exact solution of hub network design problems with profits”, European Journal of Operational Research, in press, 2017.

  • F. Enderer, C. Contardo, I. Contreras, “Integrating dock-door assignment and vehicle routing in cross-docking ”, Computers and Operations Research , in press, 2017.

  • C.A. Zetina, I. Contreras, J.F. Cordeau, E. Nikbakhsh, “Robust uncapacitated hub location ”, Transportation Research Part B , in press, 2017.

  • C. Ortiz-Astorquiza, I. Contreras, G. Laporte, “Formulations and approximation algorithms for multi-level uncapacitated facility location ”, INFORMS Journal on Computing , Articles in advance, doi.org/10.1287/ijoc.2017.0757, 2017.

  • M. Tanash, I. Contreras, N. Vidyarthi, “An exact algorithm for the modular hub location problem ”, Computers and Operations Research, 85, 32-44, 2017.

  • A. Alibeyg, I. Contreras, E. Fernández, “Hub network design problems with profits”, Transportation Research Part E , 96, 40-59, 2016.

  • I. Contreras, M. Tanash, N. Vidyarthi, “Exact and heuristic approaches for the cycle hub location problem”, Annals of Operations Research, articles in advance, 2016.

  • W. Nassief, I. Contreras, R. As'ad, “A Mixed-Integer Programming formulation and Lagrangean relaxation for the cross-dock door assignment problem”, International Journal of Production Research, 54(2), 494-508, 2016.

  • C. Ortiz-Astorquiza, I. Contreras, G. Laporte, “Multi-level facility location as the maximization of a submodular set function”, European Journal of Operational Research, 247, 1013-1016, 2015.

  • E. Martins de Sa, I. Contreras, J.F. Cordeau, R. de Camargo, G. Miranda, “The hub line location problem”, Transportation Science, 49, 500-518, 2015.

  • E. Martins de Sa, I. Contreras, J.F. Cordeau, “Exact and heuristic algorithms for the design of hub networks with multiple lines”, European Journal of Operational Research, 246, 186-198, 2015.

  • C. Ortiz, I. Contreras, G. Laporte, “The minimum flow cost Hamiltonian cycle problem: a comparison of formulations”, Discrete Applied Mathematics, 187, 140-154, 2015.

  • I. Contreras, “Hub location problems”, in Location Science, (Eds.) G. Laporte, S. Nickel, F. Saldanha-da-Gama, Springer, 2015.

  • I. Contreras, E. Fernández, “Hub location as the minimization of a supermodular set function”, Operations Research, 62, 557-570, 2014.

  • A. Alibeyg, I. Contreras, E. Fernández, “A lagrangean relaxation for uncapacitated hub location problems with profits”, Conference Proceedings of the CLAIO , in press, 2014.

  • I. Contreras, J.F. Cordeau, G. Laporte, “Exact solution of large-scale hub location problems with multiple capacity levels”, Transportation Science, 46, 439-459, 2012.

  • I. Contreras, E. Fernández, “General network design: A unified view of combined location and network design problems”, European Journal of Operational Research 219, 680-697, 2012.

  • I. Contreras, E. Fernández, G. Reinelt “Minimizing the maximum travel time in a combined model of facility location and network design”, Omega 40, 847-860, 2012.

  • I. Contreras, J.F. Cordeau, G. Laporte, “Benders decomposition for large-scale uncapacitated hub location”, Operations Research 59, 1477-1490, 2011.

  • I. Contreras, J.F. Cordeau, G. Laporte, “Stochastic uncapacitated hub location”, European Journal of Operational Research 212, 518-528, 2011.

  • I. Contreras, J.F. Cordeau, G. Laporte, “The dynamic uncapacitated hub location problem”, Transportation Science 45, 18-32, 2011.

  • I. Contreras, J.A. Díaz, E. Fernández, “Branch and price for large-scale capacitated hub location problems with single assignment”, INFORMS Journal on Computing 23, 41-55, 2011.

  • I. Contreras, E. Fernández, A. Marin “Lagrangean bounds for the optimum communication spanning tree problem” TOP 18, 140-157, 2010.

  • I. Contreras, E. Fernández, A. Marin “The tree of hubs location problem”, European Journal of Operational Research 202, 390-400, 2010.

  • I. Contreras, E. Fernández, A. Marin “Tight bounds from a path based formulation for the tree of hubs location problem”, Computers and Operations Research 36, 3117-3127, 2009.

  • I. Contreras, J.A. Díaz, E. Fernández, “Lagrangean relaxation for the capacitated hub location problem with single assignment”, OR Spectrum 31, 483-505, 2009.

  • I. Contreras, J. Díaz, “Scatter search for the single source capacitated facility location problem”, Annals of Operations Research 157, 73-89, 2008.

Presentations in International Conferences

  • A. Alibeyg, I. Contreras, E. Fernández, “Hub location with profits”, 26th Joint INFORMS- EURO International Conference, Rome, Italy, July 2013.

  • I. Contreras, F. Mirzaghafour, “The modular hub location problem”, 26th Joint INFORMS- EURO International Conference, Rome, Italy, July 2013.

  • M. Tanash, I. Contreras, N. Vidyarthi, “The cycle hub location problem”, Optimization Days 2013, Montreal, Canada, May 2013.

  • C. Ortiz, I. Contreras, G. Laporte, “The minimum flow cost Hamiltonian tour problem”, Optimization Days 2013, Montreal, Canada, May 2013.

  • A. Alibeyg, I. Contreras, E. Fernández, “Hub location with profits”, Optimization Days 2013, Montreal, Canada, May 2013.

  • B. Hosseini, I. Contreras, S. Chauhan, “The modular hub location problem”, Optimization Days 2013, Montreal, Canada, May 2013.

  • E. Martins de Sa, I. Contreras, J.F. Cordeau, R. de Camargo, G. Miranda, “The hub line location problem”, Optimization Days 2013, Montreal, Canada, May 2013.

  • I. Contreras, E. Fernández, “ Hub location as the minimization of a supermodular set function ”, 25th European conference on operational research, Vilnius, Lithuania, July 2012.

  • I. Contreras, E. Fernández, “ Branch and price for hub location problems with single assignment ”, International workshop on column generation 2012, Bromont, Canada, June, 2012.

  • I. Contreras, E. Fernández, “Supermodular properties in hub location ”, Optimization days 2012, Montreal, Canada, May 2012.

  • I. Contreras, J.F. Cordeau, G. Laporte, “Exact solution of large-scale hub location problems with multiple capacity levels”, XIX European working group in locational analysis meeting, Nantes, France, October 2011.

  • I. Contreras, J.F. Cordeau, G. Laporte, “Recent developments in hub location”, CIRRELT Conference 2011, Montreal, Canada, May 2011.

  • I. Contreras, J.F. Cordeau, G. Laporte, “Stochastic uncapacitated hub location”, Optimization days 2011, Montreal, Canada, May 2011.

  • I. Contreras, J.F. Cordeau, G. Laporte, “The dynamic uncapacitated hub location problem”, 24th European conference on operational research, Lisbon, Portugal, July 2010.

  • I. Contreras, J.F. Cordeau, G. Laporte, “Benders decomposition for large-scale uncapacitated hub location”. Seventh triennial symposium on transportation analysis, Tromso, Norway, June 2010.

  • I. Contreras, J.F. Cordeau, G. Laporte, “The dynamic uncapacitated hub location problem”, Optimization days 2010, Montreal, Canada, May 2010.

  • I. Contreras, E. Fernández, A. Marin, “The tree of hubs location problem”, Optimization days 2009, Montreal, Canada, May 2009.

  • I. Contreras, E. Fernández, A. Marin, “Models and algorithms for the optimum communication spanning tree problem”, Euro working group in locational analysis 2008, Elche, Spain, September 2008.

  • I. Contreras, J.A. Díaz, E. Fernández, “An exact branch and price algorithm for the capacitated hub location problem with single assignment”, International symposium on locational decisions, Santa Barbara, United States, June 2008.

  • I. Contreras, E. Fernández, A. Marin, “Models and algorithms for the optimum communication spanning tree problem”, International workshop on operational research 2008, Madrid, Spain, June 2008.

  • I. Contreras, J.A. Díaz, E. Fernández, “A column generation approach for the capacitated single allocation hub location problem”, Workshop in hub location, Trippstadt, Germany, September 2007.

  • I. Contreras, J.A. Díaz, E. Fernández, “A Lagrangean relaxation approach for the capacitated single allocation hub location problem”, Meeting of the thematic network: Analysis and applications decisions on locations of services and related problems, Baeza, Spain, Mars 2007.

  • I. Contreras, J.A. Díaz, E. Fernández, “A Lagrangean relaxation approach for the capacitated single allocation hub location problem”, Euro winter institute in location and logistics 2007, Estoril, Portugal, January 2007.

  • I. Contreras, J.A. Díaz, “Scatter search for the single source capacitated facility location problem”, XII Latin-iberoamerican congress in operations research and systems, La Habana, Cuba, October 2004.