Ivan Contreras

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Submitted Papers

  • Gaze, S., Contreras, I., Cordeau, J-F, “A two-stage stochastic collaborative intertwined supply network design problem under multiple disruptions”, submitted, 2022.

  • Zetina, C., Contreras I., Jayawasal, S., “An exact algorithm for large-scale non-convex quadratic capacitated facility location”, submitted to Transportation Science , 2021.

  • Hagi, M., H., Contreras, I., Bhuiyan, N, Batista, G. “Multi-stage outpatient scheduling at a Cancer Centre”, submitted to Expert Systems with Applications , 2021.

  • Hagi, M., Contreras, I., “Formulations and matheuristics for crossdocking scheduling with handling times”, submitted to Transportation Research Part B , 2021.

  • Hagi, M., Doulabi, H., Contreras, I., Bhuiyan, N, “Integrated Consultation and Chemotherapy Scheduling with Stochastic Treatment Times”, submitted to Journal of the Operational Research Society , 2021.

Publications

  • Malik, A., Contreras, I., Vidyarthi, N, “Two-level capacitated facility location with concave costs”, Transportation Science , 2022, in press.

  • Hooshangi-Tabrizi, P., Doulabi, H, Contreras, I, Bhuiyan, N, “Two-stage robust optimization for perishable inventory management with order modification”, Expert Systems with Applications , 2022, in press.

  • Hellsten, E.*, Koza, D.F., Contreras, I., Pisinger, D. Cordeau, J.-F. “The Transit Time Constrained Fixed Charge Multi-commodity Flow Problem”, Computers and Operations Research , 2021, 105511.

  • Bernardes Real, L.*, Contreras, I., Cordeau, J.-F., de Camargo R. Miranda G. “Multimodal hub network design with flexible routing”, Transportation Research Part E , 146, 102188, 2021.

  • Alumur, S., Campbell J., Contreras I., Kara, B.Y., Marianov, V., O’Kelly M, “Perspectives on modeling hub location problems”, European Journal of Operational Research , 29, 1-17, 2021.

  • Contreras, I., Le, D. (2021). Learning Routing Models with Cluster Precedence Constraints for the Amazon Last Mile Routing Research Challenge. In Winkenbach, M., Parks, S., & Noszek, J. (Eds.), Technical Proceedings of the 2021 Amazon Last Mile Routing Research Challenge (pp. 164–180). MIT Libraries.

  • Ponce, D., Contreras I, Laporte G. “E-commerce shipping through a third-party supply chain”, Transportation Research Part E , 140, 101970, 2020.

  • M. Tohidi, M. Kazemi Zanjani, I. Contreras, “A physicians planning framework for polyclinics under uncertainty”, Omega , 102275, 2020.

  • Hooshangi-Tabrizi, P., Contreras, I., Bhuiyan, N, Batist, G, “ Improving patient-care services at an oncology clinic with a flexible adaptive scheduling procedure ”, Expert Systems with Applications, 150, 113267, 2020.

  • Ibrahim, S., Contreras, I., Diaz, J.A., Luna, D., “Integrated cross-dock door assignment and truck scheduling with handling times”, TOP , 28, 705-727, 2020.

  • P. de Oliveira, I. Contreras, R. De Camargo, G. Miranda, “A comparison of separation routines for Benders optimality cuts for two-level facility location problems ”, Expert Systems with Applications , 141, 112928, 2020.

  • Zetina, C., I. Contreras, J.-F. Cordeau, “Multicommodity Fixed Charge Network Design with Elastic Demand”, Transportation Research Part B , 127, 1-19, 2019.

  • Zetina, C., I. Contreras, J.F. Cordeau, “Exact algorithms for the multicommodity uncapacitated fixed-charge network design problem”, Computers and Operations Research , 111, 311-324, 2019.

  • C. Ortiz-Astorquiza, I. Contreras, G. Laporte, “ An exact algorithm for multi-level uncapacitated facility location”, Transportation Science , 53(4), 1085-1106, 2019.

  • C.A. Zetina, I. Contreras, E. Fernández, C. Luna-Mota, “ Solving the optimum communication spanning tree problem”, European Journal of Operational Research , 273, 108-117, 2019.

  • A. Acevedo-Ojeda, I. Contreras, M. Chen, “ Two-level lot-sizing with raw-material perishability and deterioration”, Journal of the Operational Research Society , in press, 2019.

  • M. Tohidi, M. Kazemi Zanjani, I. Contreras, “Integrating physician and clinic scheduling in ambulatory polyclinics”, Journal of the Operational Research Society , 70, 177-191, 2019.

  • Contreras, I, Ortiz-Astorquiza, C, “Hierarchical Facility Location Problems”, in Location Science, (Eds.) G. Laporte, S. Nickel, F. Saldanha-da-Gama, Second Edition, Springer, 2019.

  • I. Contreras, O'Kelly, M, “Hub location problems”, in Location Science, (Eds.) G. Laporte, S. Nickel, F. Saldanha-da-Gama, Second Edition, Springer, 2019.

  • W. Nassief, I. Contreras, B. Jaumard, “ A comparison of formulations and relaxations for cross-dock door assignment problems”, Computers and Operations Reseaerch , 94, 76-88, 2018.

  • C. Ortiz-Astorquiza, I. Contreras, G. Laporte, “Multilevel facility location problems”, European Journal of Operational Research , 267, 791-805, 2018.

  • A. Alibeyg, I. Contreras, E. Fernández, “Exact solution of hub network design problems with profits”, European Journal of Operational Research, 266, 57-71, 2018.

  • F. Enderer, C. Contardo, I. Contreras, “Integrating dock-door assignment and vehicle routing in cross-docking ”, Computers and Operations Research , 88, 30-43, 2017.

  • C.A. Zetina, I. Contreras, J.F. Cordeau, E. Nikbakhsh, “Robust uncapacitated hub location ”, Transportation Research Part B , 106, 393-410, 2017.

  • C. Ortiz-Astorquiza, I. Contreras, G. Laporte, “Formulations and approximation algorithms for multi-level uncapacitated facility location ”, INFORMS Journal on Computing , 29(4), 767-779, 2017.

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

  • I. Contreras, M. Tanash, N. Vidyarthi, “Exact and heuristic approaches for the cycle hub location problem”, Annals of Operations Research, 258, 655-677, 2017.

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