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  1. Published

    A reinforcement learning hyper-heuristic for water distribution network optimisation

    Ahmed, A. O. M., Osman, S. M. Y., Yousif, T. E. H. & Kheiri, A., 17/05/2021, 2020 International Conference on Computer, Control, Electrical, and Electronics Engineering (ICCCEEE). IEEE, 4 p.

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review

  2. Published

    Iterated Chvatal-Gomory cuts and the geometry of numbers

    Aliev, I. & Letchford, A., 2014, In: SIAM Journal on Optimization. 24, 3, p. 1294-1312 19 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  3. Published

    A polyhedral approach to the single row facility layout problem

    Amaral, A. R. S. & Letchford, A., 10/2013, In: Mathematical Programming. 141, 1-2, p. 453-477 25 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  4. Published

    A new lower bound for the minimum linear arrangement of a graph

    Amaral, A., Caprara, A., Letchford, A. N. & Salazar-Gonzalez, J-J., 20/02/2008, In: Electronic Notes in Discrete Mathematics. 30, p. 87-92

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  5. Published

    Crowdsourced Delivery—A Dynamic Pickup and Delivery Problem with Ad Hoc Drivers

    Arslan, A., Agatz, N., Kroon, L. & Zuidwijk, R., 31/01/2019, In: Transportation Science. 53, 1, p. 222-235 14 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  6. Published

    Operational Strategies for on-demand personal shopper services

    Arslan, A., Agatz, N. & Klapp, M. A., 30/09/2021, In: Transportation Research Part C: Emerging Technologies . 130, 17 p., 103320.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  7. Published

    Operational strategies for on-demand delivery services

    Arslan, A., 21/11/2019, 149 p.

    Research output: Thesis › Doctoral Thesis

  8. Published

    A State Transition MIP Formulation for the Unit Commitment Problem

    Atakan, S., Lulli, G. & Sen, S., 01/2018, In: IEEE Transactions on Power Systems. 33, 1, p. 736-748 13 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  9. Published

    Enhancing the performance of one-way electric carsharing systems through the optimum deployment of fast chargers

    Bekli, S., Boyacı, B. & Zografos, K. G., 31/10/2021, In: Transportation Research Part B: Methodological. 152, p. 118-139 22 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  10. Published

    Using ℓp-norms for fairness in combinatorial optimisation

    Bektas, T. & Letchford, A., 1/08/2020, In: Computers and Operations Research. 120, 11 p., 104975.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  11. Published

    A faster exact method for solving the robust multi-mode resource-constrained project scheduling problem

    Bold, M. & Goerigk, M., 30/09/2022, In: Operations Research Letters. 50, 5, p. 581-587 7 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  12. Published

    Matheuristics: survey and synthesis

    Boschetti, M., Letchford, A. & Maniezzo, V., 30/11/2023, In: International Transactions in Operational Research. 30, 6, p. 2840-2866 27 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  13. Published

    Investigating the effect of temporal and spatial flexibility on the performance of one-way electric carsharing systems

    Boyacı, B. & Zografos, K. G., 1/11/2019, In: Transportation Research Part B: Methodological. 129, p. 244-272 29 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  14. Published

    Vehicle routing on road networks: how good is Euclidean approximation?

    Boyacı, B., Dang, T. & Letchford, A., 1/05/2021, In: Computers and Operations Research. 129, 13 p., 105197.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  15. Published

    On matchings, T-joins and arc routing problems

    Boyacı, B., Dang, T. & Letchford, A., 31/01/2022, In: Networks. 79, 1, p. 20-31 12 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  16. Published

    A Matheuristic Approach for Finding Effective Base Locations and Team Configurations for North West Air Ambulance

    Boyacı, B., Nayeem, M. A. & Kheiri, A., 8/07/2021, GECCO '21: Proceedings of the Genetic and Evolutionary Computation Conference Companion. Chicano, F. (ed.). New York: ACM, p. 1817-1824 8 p.

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review

  17. Published

    Improving a constructive heuristic for the general routing problem

    Boyacı, B., Dang, T. & Letchford, A., 31/01/2023, In: Networks. 81, 1, p. 93-106 14 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  18. Published

    Fast upper and lower bounds for a large-scale real-world arc routing problem

    Boyacı, B., Dang, T. & Letchford, A., 31/01/2023, In: Networks. 81, 1, p. 107-124 18 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  19. Published

    Handling User-based Relocations in One-way Carsharing Systems Considering User Acceptance Rates

    Boyacı, B., Bekli, S. & Zografos, K. G., 28/04/2023.

    Research output: Contribution to conference - Without ISBN/ISSN › Abstract › peer-review

  20. Published

    Unbounded convex sets for non-convex mixed-integer quadratic programming

    Burer, S. & Letchford, A., 1/02/2014, In: Mathematical Programming. 143, 1-2, p. 231-256 26 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  21. Published

    Application of selection hyper-heuristics to the simultaneous optimisation of turbines and cabling within an offshore windfarm

    Butterwick, T., Kheiri, A., Lulli, G., Gromicho, J. & Kreeft, J., 31/05/2023, In: Renewable Energy. 208, p. 1-16 16 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  22. Published

    On the separation of maximally violated mod-k cuts

    Caprara, A., Fischetti, M. & Letchford, A. N., 1999, Integer Programming and Combinatorial Optimization: Proceedings of the 7th International IPCO Conference. Cornuéjols, G., Burkard, R. E. & Woeginger, G. J. (eds.). Berlin: Springer, p. 87-98 12 p. (Lecture Notes in Computer Science ; vol. 1610).

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Chapter (peer-reviewed) › peer-review

  23. Published

    Lower bounds for the minimum linear arrangement of a graph

    Caprara, A., Letchford, A. & Salazar Gonzalez, J. J., 1/08/2010, In: Electronic Notes in Discrete Mathematics. 36, p. 843-849 7 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  24. Published

    On scenario aggregation to approximate robust combinatorial optimization problems

    Chassein, A. & Goerigk, M., 10/2018, In: Optimization Letters. 12, 7, p. 1523-1533 11 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  25. E-pub ahead of print

    Compromise Solutions for Robust Combinatorial Optimization with Variable-Sized Uncertainty

    Chassein, A. & Goerigk, M., 5/02/2018, (E-pub ahead of print) In: European Journal of Operational Research. 269, 2, p. 544-555 12 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  26. Published

    A survey on exact algorithms for the maximum flow and minimum-cost flow problems

    Cruz Mejía, O. & Letchford, A., 30/09/2023, In: Networks. 82, 2, p. 167-176 10 p.

    Research output: Contribution to Journal/Magazine › Review article › peer-review

  27. Published

    A Multi-Objective Integer Approach for Optimizing Trajectory Based Operations (TBO)

    Dal Sasso, V., Djeumou Fomeni, F., Lulli, G., Murgese, G. & Zografos, K. G., 8/01/2018.

    Research output: Contribution to conference - Without ISBN/ISSN › Conference paper › peer-review

  28. Published

    Incorporating Stakeholders’ priorities and preferences in 4D trajectory optimization

    Dal Sasso, V., Djeumou Fomeni, F., Lulli, G. & Zografos, K. G., 11/2018, In: Transportation Research Part B: Methodological. 117, A, p. 594-609 16 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  29. Published

    Planning efficient 4D trajectories in Air Traffic Flow Management

    Dal Sasso, V., Djeumou Fomeni, F., Lulli, G. & Zografos, K. G., 16/07/2019, In: European Journal of Operational Research. 276, 2, p. 676-687 12 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  30. Published

    A dynamic programming heuristic for the quadratic knapsack problem

    Djeumou Fomeni, F. & Letchford, A., 02/2014, In: INFORMS Journal on Computing. 26, 1, p. 173-182 10 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  31. Published

    Cutting planes for RLT relaxations of mixed 0-1 polynomial programs

    Djeumou Fomeni, F., Kaparis, K. & Letchford, A., 2015, In: Mathematical Programming. 151, 2, p. 639–658 20 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  32. Published

    A cut-and-branch algorithm for the quadratic knapsack problem

    Djeumou Fomeni, F., Kaparis, K. & Letchford, A., 31/05/2022, In: Discrete Optimization. 44, 2, 18 p., 100579.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  33. Published

    Mixed uncertainty sets for robust combinatorial optimization

    Dokka, T., Goerigk, M. & Roy, R., 1/09/2020, In: Optimization Letters. 14, p. 1323–1337 15 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  34. Published

    On the complexity of surrogate and group relaxation for integer linear programs

    Dokka, T., Letchford, A. & Mansoor, H., 31/07/2021, In: Operations Research Letters. 49, 4, p. 530-534 5 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  35. Published

    Revisiting surrogate relaxation for the multidimensional knapsack problem

    Dokka, T., Letchford, A. & Mansoor, H., 30/11/2022, In: Operations Research Letters. 50, 6, p. 674-678 5 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  36. Published

    Multi-level bottleneck assignment problems: Complexity and sparsity-exploiting formulations

    Dokka, T. & Goerigk, M., 30/06/2023, In: Computers and Operations Research. 154, 12 p., 106213.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  37. Unpublished

    Non-parametric dynamic pricing: a non-adversarial robust optimization approach

    Dokka Venkata Satyanaraya, T., Jacko, P. & Aslam, W., 2018, (Unpublished) Lancaster: Lancaster University Management School, (Lancaster University Management School Working Paper ; vol. 2018, no. 3).

    Research output: Working paper

  38. Published

    Improving Abatement Levels and Welfare by Coarse Correlation in an Environmental Game

    Dokka Venkata Satyanaraya, T., Moulin, H., Ray, I. & Sen Gupta, S., 05/2019, Lancaster: Lancaster University, Department of Economics, (Economics Working Papers Series).

    Research output: Working paper

  39. Published

    An Efficient Approach to Distributionally Robust Network Capacity Planning

    Dokka Venkata Satyanaraya, T., Garuba, F., Goerigk, M. & Jacko, P., 9/04/2020, In: arXiv.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  40. Published

    Equilibrium Design by Coarse Correlation in Quadratic Games

    Dokka Venkata Satyanaraya, T., Moulin, H., Ray, I. & Sen Gupta, S., 31/07/2020, Lancaster : Lancaster University, Department of Economics, (Economics Working Papers Series).

    Research output: Working paper

  41. Published

    Recent Advances in Selection Hyper-heuristics

    Drake, J. H., Kheiri, A., Özcan, E. & Burke, E. K., 1/09/2020, In: European Journal of Operational Research. 285, 2, p. 405-428 24 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  42. Published

    Polyhedral theory for arc routing problems

    Eglese, R. W. & Letchford, A. N., 2000, Arc Routing : Theory, Solutions and Applications. Dordrecht: Kluwer Academic Publishers, p. 199-230 32 p.

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Chapter (peer-reviewed) › peer-review

  43. Published

    Disruption management in vehicle routing and scheduling for road freight transport: a review

    Eglese, R. W. & Zambirinis, S., 04/2018, In: TOP. 26, 1, p. 1-17 17 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  44. Published

    General routing problem

    Eglese, R. & Letchford, A., 4/09/2008, Encyclopedia of Optimization. Floudas, C. & Pardalos, P. (eds.). 2nd ed. New York: Springer, p. 1252-1254 3 p.

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Entry for encyclopedia/dictionary

  45. Forthcoming

    Arc routing problems

    Eglese, R. & Letchford, A., 30/01/2024, (Accepted/In press) Encyclopedia of Optimization. Pardalos, P. & Prokopyev, O. (eds.). 3rd ed. Springer

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Entry for encyclopedia/dictionary

  46. Published

    Convergence and polynomiality of primal-dual interior-point algorithms for linear programming with selective addition of inequalities

    Engau, A. & Anjos, M. F., 12/2017, In: Optimization. 66, 12, p. 2063-2086 24 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  47. Published

    Proper efficiency and tradeoffs in multiple criteria and stochastic optimization

    Engau, A., 2017, In: Mathematics of Operations Research. 42, 1, p. 119-134 16 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  48. Published

    Definition and characterization of Geoffrion proper efficiency for real vector optimization with infinitely many criteria

    Engau, A., 05/2015, In: Journal of Optimization Theory and Applications. 165, 2, p. 439-457 19 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  49. Published

    Multicriteria modeling and tradeoff analysis for oil load dispatch and hauling operations at Noble Energy

    Engau, A., 03/2015, In: Optimization and Engineering. 16, 1, p. 73-101 29 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  50. Published

    Some experiences with solving semidefinite programming relaxations of binary quadratic optimization models in computational biology

    Engau, A., 27/03/2014, In: Asia-Pacific Journal of Operational Research. 31, 4, 18 p., 1450022.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

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