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Lewis, R. 2021. Finding attractive exercise circuits in street maps. Presented at: 29th Annual GIS Research UK Conference (GISRUK 2021), Cardiff, Wales, 14-16 April 2021. 10.5281/zenodo.4665508 |
Lewis, R., Thiruvady, D. and Morgan, K.
2021.
The maximum happy induced subgraph problem: bounds and algorithms.
Computers and Operations Research
126
, 105114.
10.1016/j.cor.2020.105114
Item availability restricted. |
Sciortino, Monique, Lewis, Rhyd and Thompson, Jonathan 2021. A heuristic algorithm for school bus routing with bus stop selection. Presented at: EvoCOP 2021, Seville, Spain, Apr 2021. Published in: Zarges, Christine and Verel, Sébastien eds. Evolutionary Computation in Combinatorial Optimization. Lecture Notes in Computer Science/Theoretical Computer Science and General Issues Springer, Cham, pp. 202-218. 10.1007%2F978-3-030-72904-2_13 |
Thiruvady, Dhananjay, Lewis, Rhyd and Morgan, Kerri 2020. Tackling the maximum happy vertices problem in large networks. 4OR: A Quarterly Journal of Operations Research 18 , pp. 507-527. 10.1007/s10288-020-00431-4 |
Padungwech, Wasin, Thompson, Jonathan and Lewis, Rhyd
2020.
Effects of update frequencies in a dynamic capacitated arc routing problem.
Networks
76
(4)
, pp. 522-538.
10.1002/net.21990
Item availability restricted. |
Lewis, Rhyd 2020. Cite or be damned: some thoughts on reviewer-coerced citation. [Online]. https://scientistsarehumans.com/: Scientists are Humans. Available at: https://scientistsarehumans.com/2020/11/24/cite-or... |
Lewis, Rhyd 2020. Editorial for the special issue on “Algorithms for graphs and networks”. Algorithms 13 (11) , p. 292. 10.3390/a13110292 |
Lewis, Rhyd 2020. Algorithms for finding shortest paths in networks with vertex transfer penalties. Algorithms 13 (11) , 269. 10.3390/a13110269 |
Lewis, Rhyd 2020. A shortest path algorithm for graphs featuring transfer costs at their vertices. Presented at: International Conference on Computational Logistics, Enschede, The Netherlands, 28–30 Sept 2020. Computational Logistics. Springer Verlag, pp. 539-552. 10.1007/978-3-030-59747-4_35 |
Lewis, Rhyd 2020. A heuristic algorithm for finding attractive fixed-length circuits in street maps. Presented at: International Conference on Computational Logistics, Enschede, The Netherlands, 28–30 Sept 2020. Computational Logistics. Springer Verlag, pp. 384-395. 10.1007/978-3-030-59747-4_25 |
Kheiri, Ahmed, Lewis, Rhydian, Thompson, Jonathan and Harper, Paul
2020.
Constructing operating theatre schedules using partitioned graph colouring techniques.
Health Systems
10.1080/20476965.2020.1796530
Item availability restricted. |
Lewis, Rhyd, Anderson, Tom and Carroll, Fiona 2020. Can school enrolment and performance be improved by maximizing students' sense of choice in elective subjects? Journal of Learning Analytics 7 (1) , pp. 75-87. 10.18608/jla.2020.71.6 |
Lewis, Rhyd 2020. Five degrees of separation from De Niro - charting the social networks of movie stars. The Conversation |
Lewis, Rhyd 2020. Want to mislead and confuse? use statistics! [Online]. Scientists are Humans. Available at: https://scientistsarehumans.com/2019/01/26/want-to... |
Lewis, Rhyd 2020. Who is the centre of the movie universe? Using python and networkX to analyse the social network of movie stars. arXiv. Available at: https://arxiv.org/abs/2002.11103 |
Neis, Paulo and Lewis, Rhydian
2020.
Evaluating the influence of parameter setup on the performance of heuristics for the graph colouring problem.
International Journal of Metaheuristics
7
(4)
, pp. 352-378.
Item availability restricted. |
Lewis, R., Thiruvady, D. and Morgan, K. 2019. Finding happiness: an analysis of the maximum happy vertices problem. Computers and Operations Research 103 10.1016/j.cor.2018.11.015 |
Hawa, Asyl L., Lewis, Rhyd and Thompson, Jonathan M. 2018. Heuristics for the score-constrained strip-packing problem. Presented at: COCOA 2018: International Conference on Combinatorial Optimization and Applications, Atlanta, GA, USA, 15-17 December 2018. Published in: Kim, Donghyun, Uma, R. N. and Zelikovsky, Alexander eds. Combinatorial Optimization and Applications: 12th International Conference, COCOA 2018, Atlanta, GA, USA, December 15-17, 2018, Proceedings. Lecture Notes in Computer Science Springer Verlag, p. 449. 10.1007/978-3-030-04651-4_30 |
Lewis, Rhydian 2018. Two example optimisation problems from the world of education. Presented at: OR Society Annual Conference (OR60), Lancaster, UK, 11-13 Sep 2018. |
Lewis, Rhyd and Smith-Miles, K. 2018. A heuristic algorithm for finding cost-effective solutions to real-world school bus routing problems. Journal of Discrete Algorithms 52-53 , pp. 2-17. 10.1016/j.jda.2018.11.001 |
Hardy, Bradley, Lewis, Rhyd and Thompson, Jonathan 2018. Tackling the edge dynamic graph colouring problem with and without future adjacency information. Journal of Heuristics 24 , pp. 321-343. 10.1007/s10732-017-9327-z |
Lewis, Rhydian, Smith-Miles, Kate and Phillips, Kyle 2018. The school bus routing problem: An analysis and algorithm. Presented at: IWOCA 2017: 28th International Workshop on Combinatorial Algorithms, Newcastle, NSW, Australia, 17-21 July 2017. Published in: Brankovic, Ljiljana, Ryan, Joe and Smyth, William F. eds. Combinatorial Algorithms: 28th International Workshop, IWOCA 2017, Newcastle, NSW, Australia, July 17-21, 2017, Revised Selected Papers. Lecture Notes in Computer Science Springer, pp. 287-298. 10.1007/978-3-319-78825-8_24 |
Lewis, Rhyd and Holborn, Penny 2017. How to pack trapezoids: exact and evolutionary algorithms. IEEE Transactions on Evolutionary Computation 21 (3) , pp. 463-476. 10.1109/TEVC.2016.2609000 |
Lewis, Rhyd and Carroll, Fiona 2016. Creating seating plans: a practical application. Journal of the Operational Research Society 67 (11) , pp. 1353-1362. 10.1057/jors.2016.34 |
Padungwech, Wasin, Thompson, Jonathan and Lewis, Rhyd 2016. Investigating edge-reordering procedures in a tabu search algorithm for the capacitated arc routing problem. Presented at: HM 2016: International Workshop on Hybrid Metaheuristics, Plymouth, UK, 8-10 June 2016. Published in: Blesa, Maria J., Blum, Christian and Cangelosi, Angelo eds. Hybrid Metaheuristics: 10th International Workshop, HM 2016, Plymouth, UK, June 8-10, 2016, Proceedings. Lecture Notes in Computer Science Cham: Springer, pp. 62-74. 10.1007/978-3-319-39636-1_5 |
Hardy, Bradley, Lewis, Rhyd and Thompson, Jonathan Mark 2016. Modifying colourings between time-steps to tackle changes in dynamic random graphs. Presented at: EvoCOP 2016: European Conference on Evolutionary Computation in Combinatorial Optimization, Porto, Portugal, 30 March - 1 April 2016. Published in: Chicano, Francisco, Hu, Bin and Garcia-Sanchez, Pablo eds. Evolutionary Computation in Combinatorial Optimization: 16th European Conference, EvoCOP 2016, Porto, Portugal, March 30 – April 1, 2016, Proceedings. Springer, pp. 186-201. 10.1007/978-3-319-30698-8_13 |
Lewis, Rhydian 2016. Graph colouring: an ancient problem with modern applications. Impact 3 (1) , pp. 47-50. 10.1080/2058802X.2016.11963998 |
Kheiri, Ahmed, Özcan, Ender, Lewis, Rhydian and Thompson, Jonathan 2016. A Sequence-based selection hyper-heuristic: a case study in nurse rostering. Presented at: PATAT 2016: 11th International Conference on the Practice and Theory of Automated Timetabling, Udine, Italy, 23-26 August 2016. Published in: Burke, Edmund K., Di Gaspero, Luca, Özcan, Ender, McCollum, Barry and Schaerf, Andrea eds. PATAT 2016: Proceedings of the 11th International Conference of the Practice and Theory of Automated Timetabling. pp. 503-505. |
Lewis, R. M. R. 2015. A guide to graph colouring: algorithms and applications. Springer. 10.1007/978-3-319-25730-3 |
Lewis, R. and Thompson, J. 2015. Analysing the effects of solution space connectivity with an effective metaheuristic for the course timetabling problem. European Journal of Operational Research 240 (3) , pp. 637-648. 10.1016/j.ejor.2014.07.041 |
Lewis, Rhyd 2015. Graph coloring and recombination. In: Kacprzyk, J. and Pedrycz, W. eds. Springer Handbook of Computational Intelligence, Springer, pp. 1239-1254. |
Rowse, Elizabeth Louise, Lewis, Rhydian, Harper, Paul Robert and Thompson, Jonathan Mark 2015. Applying set partitioning methods in the construction of operating theatre schedules. Presented at: International Conference on Theory and Practice in Modern Computing 2015, Las Palmas de Gran Canaria, Spain, 22-24 July 2015. |
Smith-Miles, Kate, Baatar, Davaatseren, Wreford, Brendan and Lewis, Rhyd 2014. Towards objective measures of algorithm performance across instance space. Computers & Operations Research 45 , pp. 12-24. 10.1016/j.cor.2013.11.015 |
Cooper, Ian, John, Matthew P., Lewis, Rhydian, Mumford, Christine Lesley and Olden, Andrew 2014. Optimising large scale public transport network design problems using mixed-mode parallel multi-objective evolutionary algorithms. Presented at: IEEE Congress on Evolutionary Computation, Beijing, China, 6 - 11 July 2014. Evolutionary Computation (CEC). IEEE, pp. 2841-2848. 10.1109/CEC.2014.6900362 |
John, Matthew P., Mumford, Christine L. and Lewis, Rhyd 2014. An improved multi-objective algorithm for the urban transit routing problem. Presented at: EvoCOP 2014: 14th European Conference on Evolutionary Computation in Combinatorial Optimization, Granada, Spain, 23-25 April 2014. Published in: Blum, Christian and Ochoa, Gabriela eds. Evolutionary Computation in Combinatorial Optimisation: 14th European Conference, EvoCOP 2014, Granada, Spain, April 23-25, 2014, Revised Selected Papers. Lecture Notes in Computer Science Springer, pp. 49-60. 10.1007/978-3-662-44320-0_5 |
Lewis, Rhydian and Carroll, Fiona 2013. The "engaged" interaction: important considerations for the HCI design and development of a web application for solving a complex combinatorial optimization problem. World Journal of Computer Application and Technology 1 (3) , pp. 75-82. |
Lewis, Rhyd, Thompson, Jonathan Mark, Mumford, Christine Lesley and Gillard, Jonathan William 2012. A wide-ranging computational comparison of high-performance graph colouring algorithms. Computers & Operations Research 39 (9) , pp. 1933-1950. 10.1016/j.cor.2011.08.010 |
Song, Xiang, Lewis, Rhyd, Thompson, Jonathan Mark and Wu, Yue 2012. An incomplete m-exchange algorithm for solving the large-scale multi-scenario knapsack problem. Computers & Operations Research 39 (9) , pp. 1988-2000. 10.1016/j.cor.2011.09.012 |
Lewis, Rhyd 2012. A time-dependent metaheuristic algorithm for post enrolment-based course timetabling. Annals of Operations Research 194 (1) , pp. 273-289. 10.1007/s10479-010-0696-z |
Holborn, Penny Louise, Thompson, Jonathan Mark and Lewis, Rhyd 2012. Combining heuristic and exact methods to solve the vehicle routing problem with pickups, deliveries and time windows. Presented at: EvoCOP 2012: 12th European Conference on Evolutionary Computation in Combinatorial Optimization, Malaga, Spain, 11-13 April 2012. Published in: Hao, J. K. and Middendorf, M. eds. Evolutionary Computation in Combinatorial Optimization: 12th European Conference, EvoCOP 2012, Málaga, Spain, April 11-13, 2012. Proceedings. Lecture Notes in Computer Science Springer Verlag, pp. 63-74. 10.1007/978-3-642-29124-1_6 |
Lewis, Rhyd, Song, Xiang, Dowsland, Kathryn Anne and Thompson, Jonathan Mark 2011. An investigation into two bin packing problems with ordering and orientation implications. European Journal of Operational Research 213 (1) , pp. 52-65. 10.1016/j.ejor.2011.03.016 |
Lewis, Rhyd and Thompson, Jonathan Mark 2011. On the application of graph colouring techniques in round-robin sports scheduling. Computers & Operations Research 38 (1) , pp. 190-204. 10.1016/j.cor.2010.04.012 |
Lewis, Rhyd and Pullin, Emma J. 2011. Revisiting the restricted growth function genetic algorithm for grouping problems. Evolutionary Computation 19 (4) , pp. 693-704. 10.1162/EVCO_a_00040 |
Song, Xiang, Chu, C. B., Lewis, Rhyd, Nie, Y. Y. and Thompson, Jonathan Mark 2010. A worst case analysis of a dynamic programming-based heuristic algorithm for 2D unconstrained guillotine cutting. European Journal of Operational Research 202 (2) , pp. 368-378. 10.1016/j.ejor.2009.05.047 |
McCollum, B., Schaerf, A., Paechter, B., McMullan, P., Lewis, Rhyd, Parkes, A. J., Gaspero, L. D., Qu, R. and Burke, E. K. 2009. Setting the Research Agenda in Automated Timetabling: The Second International Timetabling Competition. INFORMS Journal on Computing 22 (1) , pp. 120-130. 10.1287/ijoc.1090.0320 |
Lewis, Rhyd 2009. A general-purpose hill-climbing method for order independent minimum grouping problems: A case study in graph colouring and bin packing. Computers & Operations Research 36 (7) , pp. 2295-2310. 10.1016/j.cor.2008.09.004 |
Lewis, Rhydian, Paechter, Ben and McCollum, Barry 2007. Post enrolment based course timetabling: a description of the problem model used for track two of the second International Timetabling Competition. [Working Paper]. Cardiff Working Papers in Accounting and Finance, Cardiff: Cardiff University. |
Lewis, Rhyd and Paechter, Ben 2007. Finding feasible timetables using group-based operators. IEEE Transactions on Evolutionary Computation 11 (3) , pp. 397-413. 10.1109/TEVC.2006.885162 |
Lewis, Rhyd 2007. A survey of metaheuristic-based techniques for university timetabling problems. OR Spectrum 30 (1) , pp. 167-190. 10.1007/s00291-007-0097-0 |
Lewis, Rhyd 2007. Metaheuristics can solve sudoku puzzles. Journal of Heuristics 13 (4) , pp. 387-401. 10.1007/s10732-007-9012-8 |
Lewis, Rhyd 2007. On the combination of constraint programming and stochastic search: the Sudoku case. Hybrid Metaheuristics, Lecture Notes in Computer Science, vol. 4771. Springer, pp. 96-107. (10.1007/978-3-540-75514-2_8) |
Lewis, Rhyd, Paechter, Ben and Rossi-Doria, Olivia 2007. Metaheuristics for university course timetabling. In: Dahal, Keshav P., Tan, Kay Chen and Cowling, Peter I. eds. Evolutionary Scheduling, Studies in Computational Intelligence, vol. 49. Springer, pp. 237-272. (10.1007/978-3-540-48584-1_9) |
Lewis, Rhyd and Paechter, Ben 2005. Application of the grouping genetic algorithm to university course timetabling. Lecture Notes in Computer Science 3448 , pp. 144-153. 10.1007/978-3-540-31996-2_14 |