Professor DARIO LANDA SILVA's Outputs (90)

Analysis of objectives relationships in multiobjective problems using trade-off region maps (2015)
Presentation / Conference Contribution
Pinheiro, R. L., Landa-Silva, D., & Atkin, J. Analysis of objectives relationships in multiobjective problems using trade-off region maps. Presented at Proceedings of the 2015 Genetic and Evolutionary Computation Conference (GECCO 2015)

Understanding the relationships between objectives in many-objective optimisation problems is desirable in order to develop more effective algorithms. We propose a techniquefor the analysis and visualisation of complex relationships between many (thr... Read More about Analysis of objectives relationships in multiobjective problems using trade-off region maps.

A study of genetic operators for the Workforce Scheduling and Routing Problem (2015)
Presentation / Conference Contribution
Algethami, H., & Landa-Silva, D. A study of genetic operators for the Workforce Scheduling and Routing Problem. Presented at 11th Metaheuristics International Conference (MIC 2015)

The Workforce Scheduling and Routing Problem (WSRP) is concerned with planning visits of qualified workers to different locations to perform a set of tasks, while satisfying each task time-window plus additional requirements such as customer/workers... Read More about A study of genetic operators for the Workforce Scheduling and Routing Problem.

Mixed integer programming with decomposition to solve a workforce scheduling and routing problem (2015)
Presentation / Conference Contribution
Laesanklang, W., Landa-Silva, D., & Castillo-Salazar, J. A. Mixed integer programming with decomposition to solve a workforce scheduling and routing problem. Presented at International Conference on Operations Research and Enterprise Systems (ICORES 2015)

We propose an approach based on mixed integer programming (MIP) with decomposition to solve a workforce scheduling and routing problem, in which a set of workers should be assigned to tasks that are distributed across different geographical locations... Read More about Mixed integer programming with decomposition to solve a workforce scheduling and routing problem.

A greedy heuristic for workforce scheduling and routing with time-dependent activities constraints (2015)
Presentation / Conference Contribution
Castillo-Salazar, J. A., Landa-Silva, D., & Qu, R. A greedy heuristic for workforce scheduling and routing with time-dependent activities constraints. Presented at International Conference on Operations Research and Enterprise Systems (ICORES 2015)

We present a greedy heuristic (GHI) designed to tackle five time-dependent activities constraints (synchronisation, overlap, minimum difference, maximum difference and minimum-maximum difference) on workforce scheduling and routing problems. These ty... Read More about A greedy heuristic for workforce scheduling and routing with time-dependent activities constraints.

A new weighting scheme and discriminative approach for information retrieval in static and dynamic document collections (2014)
Presentation / Conference Contribution
Ibrahim, O. A. S., & Landa-Silva, D. A new weighting scheme and discriminative approach for information retrieval in static and dynamic document collections. Presented at 14th UK Workshop on Computational Intelligence (UKCI2014)

This paper introduces a new weighting scheme in information retrieval. It also proposes using the document centroid as a threshold for normalizing documents in a document collection. Document centroid normalization helps to achieve more effective inf... Read More about A new weighting scheme and discriminative approach for information retrieval in static and dynamic document collections.

Workforce scheduling and routing problems: literature survey and computational study (2014)
Journal Article
Castillo-Salazar, J. A., Landa-Silva, D., & Qu, R. (2016). Workforce scheduling and routing problems: literature survey and computational study. Annals of Operations Research, 239(1), 39-67. https://doi.org/10.1007/s10479-014-1687-2

In the context of workforce scheduling, there are many scenarios in which personnel must carry out tasks at different locations hence requiring some form of transportation. Examples of these type of scenarios include nurses visiting patients at home,... Read More about Workforce scheduling and routing problems: literature survey and computational study.

A heuristic algorithm based on multiassignment procedures for nurse scheduling (2014)
Journal Article
Constantino, A. A., Landa-Silva, D., de Melo, E. L., de Mendonza, C. F. X., Rizzato, D. B., & Romao, W. (2014). A heuristic algorithm based on multiassignment procedures for nurse scheduling. Annals of Operations Research, 218(1), https://doi.org/10.1007/s10479-013-1357-9

This paper tackles a Nurse Scheduling Problem which consists of generating work schedules for a set of nurses while considering their shift preferences and other requirements. The objective is to maximize the satisfaction of nurses? preferences and m... Read More about A heuristic algorithm based on multiassignment procedures for nurse scheduling.

A development and integration framework for optimisation-based enterprise solutions (2014)
Presentation / Conference Contribution
Pinheiro, R. L., & Landa-Silva, D. A development and integration framework for optimisation-based enterprise solutions. Presented at Proceedings of the 3rd International Conference on Operations Research and Enterprise Systems (ICORES 2014)

The operations research literature includes some papers describing collaborative work between researchers and industry. However, not much literature exists that outlines methodologies to guide the development of a decision support module and its inte... Read More about A development and integration framework for optimisation-based enterprise solutions.

An evolutionary algorithm for graph planarisation by vertex deletion (2014)
Presentation / Conference Contribution
Pinheiro, R. L., Constantino, A. A., de Mendonca, C. F. X., & Landa-Silva, D. An evolutionary algorithm for graph planarisation by vertex deletion. Presented at 16th International Conference on Enterprise Information Systems (ICEIS 2014)

A non-planar graph can only be planarised if it is structurally modified. This work presents a new heuristic algorithm that uses vertices deletion to modify a non-planar graph in order to obtain a planar subgraph. The proposed algorithm aims to delet... Read More about An evolutionary algorithm for graph planarisation by vertex deletion.

Computational study for workforce scheduling and routing problems (2014)
Presentation / Conference Contribution
Castillo-Salazar, J. A., Landa-Silva, D., & Qu, R. Computational study for workforce scheduling and routing problems. Presented at 3rd International Conference on Operations Research and Enterprise Systems (ICORES 2014)

We present a computational study on 112 instances of the Workforce Scheduling and Routing Problem (WSRP). This problem has applications in many service provider industries where employees visit customers to perform activities. Given their similarity,... Read More about Computational study for workforce scheduling and routing problems.

Particle swarm optimization for the Steiner tree in graph and delay-constrained multicast routing problems (2013)
Journal Article
Qu, R., Xu, Y., Castro-Gutierrez, J., & Landa-Silva, D. (2013). Particle swarm optimization for the Steiner tree in graph and delay-constrained multicast routing problems. Journal of Heuristics, 19(2), https://doi.org/10.1007/s10732-012-9198-2

This paper presents the first investigation on applying a particle swarm optimization (PSO) algorithm to both the Steiner tree problem and the delay constrained multicast routing problem. Steiner tree problems, being the underlining models of many ap... Read More about Particle swarm optimization for the Steiner tree in graph and delay-constrained multicast routing problems.

Overview of telematics-based prognostics and health management systems for commercial vehicles (2013)
Journal Article
Mesgarpour, M., Landa-Silva, D., & Dickinson, I. (2013). Overview of telematics-based prognostics and health management systems for commercial vehicles. Communications in Computer and Information Science, 395, https://doi.org/10.1007/978-3-642-41647-7_16

Prognostics and Health Management/Monitoring (PHM) are methods to assess the health condition and reliability of systems for the purpose of maximising operational reliability and safety. Recently, PHM systems are emerging in the automotive industry.... Read More about Overview of telematics-based prognostics and health management systems for commercial vehicles.

A survey of workforce scheduling and routing (2012)
Presentation / Conference Contribution
Castillo-Salazar, A., Landa-Silva, D., & Qu, R. A survey of workforce scheduling and routing. Presented at Proceedings of the 9th International Conference on the Practice and Theory of Automated Timetabling (PATAT 2012)

In the context of workforce scheduling, there are many scenarios in which personnel must carry out tasks at different locations hence requiring some form of transportation. Examples of these type of scenarios include nurses visiting patients at home,... Read More about A survey of workforce scheduling and routing.

An evolutionary non-Linear great deluge approach for solving course timetabling problems (2012)
Journal Article
Obit, J. H., Ouelhadj, D., Landa-Silva, D., & Alfred, R. (2012). An evolutionary non-Linear great deluge approach for solving course timetabling problems. International Journal of Computer Science Issues, 9(4),

The aim of this paper is to extend our non-linear great deluge algorithm into an evolutionary approach by incorporating a population and a mutation operator to solve the university course timetabling problems. This approach might be seen as a variati... Read More about An evolutionary non-Linear great deluge approach for solving course timetabling problems.

Evolutionary local search for solving the office space allocation problem (2012)
Presentation / Conference Contribution
Ulker, O., & Landa-Silva, D. Evolutionary local search for solving the office space allocation problem. Presented at 2012 IEEE Congress on Evolutionary Computation (CEC 2012)

Office Space Allocation (OSA) is the task of correctly allocating the spatial resources of an institution to a set of entities by minimising the wastage of space and the violation of additional constraints. In this paper, an evolutionary local search... Read More about Evolutionary local search for solving the office space allocation problem.

Designing a multi-agent approach system for distributed course timetabling (2011)
Presentation / Conference Contribution
Obit, J. H., Landa-Silva, D., Ouelhadj, D., Khan Vun, T., & Alfred, R. Designing a multi-agent approach system for distributed course timetabling. Presented at Proceedings of the 2011 IEEE Hybrid Intelligent Systems Conference (IEEE-HIS 2011)

This paper proposes tackling the difficult course timetabling problem using a multi-agent approach. The proposed design seeks to deal with the problem using a distributed solution environment in which a mediator agent coordinates various timetabling... Read More about Designing a multi-agent approach system for distributed course timetabling.

Nature of real-world multi-objective vehicle routing with evolutionary algorithms (2011)
Presentation / Conference Contribution
Castro-Gutierrez, J., Landa-Silva, D., & Moreno Perez, J. Nature of real-world multi-objective vehicle routing with evolutionary algorithms. Presented at Proceedings of the 2011 IEEE International Conference on Systems, Man, and Cybernetics (IEEE SMC 2011)

The Vehicle Routing Problem with Time Windows VRPTW) is an important logistics problem which in the realworld appears to be multi-objective. Most research in this area has been carried out using classic datasets designed for the single-objective case... Read More about Nature of real-world multi-objective vehicle routing with evolutionary algorithms.

Hybrid heuristic for multi-carrier transportation plans (2011)
Presentation / Conference Contribution
Landa-Silva, D., Wang, Y., Donovan, P., & Kendall, G. Hybrid heuristic for multi-carrier transportation plans. Presented at 9th Metaheuristics International Conference (MIC 2011)

This paper describes a hybrid heuristic approach to construct transportation plans for a singlecustomer multi-carrier scenario that arises at 3T Logistics Ltd, a UK company that provides outsourced transportation planning and management services. The... Read More about Hybrid heuristic for multi-carrier transportation plans.

Comparing hybrid constructive heuristics for university course timetabling (2011)
Presentation / Conference Contribution
Landa-Silva, D., & Obit, J. H. Comparing hybrid constructive heuristics for university course timetabling. Presented at VII ALIO/EURO Workshop on Applied Combinatorial Optimization

This extended abstract outlines four hybrid heuristics to generate initial solutions to the University course timetabling problem. These hybrid approaches combine graph colouring heuristics and local search in different ways. Results of experiments u... Read More about Comparing hybrid constructive heuristics for university course timetabling.

Designing difficult office space allocation problem instances with mathematical programming (2011)
Presentation / Conference Contribution
Ulker, O., & Landa-Silva, D. Designing difficult office space allocation problem instances with mathematical programming. Presented at Experimental Algorithms10th International Symposium, SEA 2011

Office space allocation (OSA) refers to the assignment of room space to a set of entities (people, machines, roles, etc.), with the goal of optimising the space utilisation while satisfying a set of additional constraints. In this paper, a mathematic... Read More about Designing difficult office space allocation problem instances with mathematical programming.