Using graphical information systems to improve vehicle routing problem instances.
Conference Proceeding
Urquhart, N. B., Scott, C., & Hart, E. (2013)
Using graphical information systems to improve vehicle routing problem instances. In C. Blum (Ed.), GECCO'13 Companion (1097-1102). https://doi.org/10.1145/2464576.2466802
This paper makes the assertion that vehicle routing rearch has produced increasingly more powerful problem solvers, but has not increased the realism or compexity of typical p...
Planning and optimising organisational travel plans using an evolutionary algorithm.
Conference Proceeding
Urquhart, N. B. (2011)
Planning and optimising organisational travel plans using an evolutionary algorithm. In C. Chio, A. Brabazon, G. A. Caro, R. Drechsler, M. Farooq, J. Grahl, …G. Squillero (Eds.), Applications of Evolutionary Computation, (464-470). https://doi.org/10.1007/978-3-642-20520-0_47
Commuting to the workplace is a highly individualistic experience, especially where the private car is the chosen mode of transport. The costs of using cars with low occupancy...
State assignment for sequential circuits using multi-objective genetic algorithm
Journal Article
Al-Jassani, B. A., Urquhart, N. B., & Almaini, A. E. A. (2011)
State assignment for sequential circuits using multi-objective genetic algorithm. IET Computers and Digital Techniques, 5, 296-305. https://doi.org/10.1049/iet-cdt.2010.0045
In this study, a new approach using a multi-objective genetic algorithm (MOGA) is proposed to determine the optimal state assignment with less area and power dissipations for ...
Using emissions model with EAs.
Presentation / Conference
Urquhart, N. B. (2011, April)
Using emissions model with EAs. Paper presented at YoungOR 17, Nottingham, UK
Using an evolutionary algorithm to discover low CO2 tours within a Travelling Salesman Problem
Conference Proceeding
Urquhart, N. B., Scott, C., & Hart, E. (2010)
Using an evolutionary algorithm to discover low CO2 tours within a Travelling Salesman Problem. In C. Chio, A. Brabazon, G. A. Di Caro, M. Ebner, M. Farooq, A. Fink, …N. Urquhart (Eds.), Applications of evolutionary computation : EvoApplications 2010: EvoCOMNET, EvoENVIRONMENT, EvoFIN, EvoMUSART, and EvoTRANSLOG, Istanbul, Turkey, April 7-9, 2010, Proceedings, Part II (421-430). https://doi.org/10.1007/978-3-642-12242-2_43
This paper examines the issues surrounding the effects of using vehicle emissions as the fitness criteria when solving routing problems using evolutionary techniques. The case...
Influence of topology and payload on CO2 optimised vehicle routing
Conference Proceeding
Scott, C., Urquhart, N. B., & Hart, E. (2010)
Influence of topology and payload on CO2 optimised vehicle routing. In Applications of Evolutionary Computing (141-150). https://doi.org/10.1007/978-3-642-12242-2_15
This paper investigates the influence of gradient and payload correction factors used within a CO2 emission model on the solutions to shortest path and travelling salesman pro...
Building low CO2 solutions to the vehicle routing problem with time windows using an evolutionary algorithm.
Conference Proceeding
Urquhart, N. B., Hart, E., & Scott, C. (2010)
Building low CO2 solutions to the vehicle routing problem with time windows using an evolutionary algorithm. In IEEE Congress on Evolutionary Computation. https://doi.org/10.1109/CEC.2010.5586088
An evolutionary Multi-Objective Algorithm (MOA) is used to investigate the trade-off between CO2 savings, distance and number of vehicles used in a typical vehicle routing pro...
Manipulation and optimization techniques for Boolean logic
Journal Article
Al-Jassani, B. A., Urquhart, N. B., & Almaini, A. E. A. (2010)
Manipulation and optimization techniques for Boolean logic. IET computers & digital techniques / IET, 4, 227-239. https://doi.org/10.1049/iet-cdt.2009.0007
In this study, new techniques and algorithms are presented for the derivation and optimisation of mixed polarity Reed Muller (MPRM) and mixed polarity dual Reed Muller (MPDRM)...
Using real-world geospatial data with evolutionary algorithms.
Presentation / Conference
Urquhart, N. B. (2010, January)
Using real-world geospatial data with evolutionary algorithms. Paper presented at Universities' Transport Study Group, Plymouth, UK
Developments in the field of Geographical Information Systems (GIS) have increased the availability of on-line road network data and associated routing services. The ability t...
Application of CoSMoS parallel design patterns to a pedestrian simulation.
Conference Proceeding
Clayton, S., Urquhart, N. B., & Kerridge, J. (2009)
Application of CoSMoS parallel design patterns to a pedestrian simulation. In R. Wyrzykowski, J. Dongarra, K. Karczewski, & J. Wasniewski (Eds.), Parallel Processing and Applied Mathematics, (505-512). https://doi.org/10.1007/978-3-642-14403-5_53
In this paper, we discuss the implementation of a simple pedestrian simulation that uses a multi agent based design pattern developed by the CoSMoS research group. Given the n...