IMIS

Publicaties | Instituten | Personen | Datasets | Projecten | Kaarten
[ meld een fout in dit record ]mandje (0): toevoegen | toon Print deze pagina

Exact and heuristic methods for placing ships in locks
Verstichel, J.; De Causmaecker, P.; Spieksma, F.; Vanden Berghe, G. (2014). Exact and heuristic methods for placing ships in locks. Eur. J. Oper. Res. 235(2): 387-398. https://dx.doi.org/10.1016/j.ejor.2013.06.045
In: European Journal of Operational Research. Elsevier: Amsterdam. ISSN 0377-2217; e-ISSN 1872-6860, meer
Peer reviewed article  

Beschikbaar in  Auteurs 

Trefwoord
    Marien/Kust
Author keywords
    Ship placement problem; Packing; Heuristics; Lock scheduling;Decomposition

Auteurs  Top 
  • Verstichel, J., meer
  • De Causmaecker, P., meer
  • Spieksma, F., meer
  • Vanden Berghe, G., meer

Abstract
    The ship placement problem constitutes a daily challenge for planners in tide river harbours. In essence, it entails positioning a set of ships into as few lock chambers as possible while satisfying a number of general and specific placement constraints. These constraints make the ship placement problem different from traditional 2D bin packing. A mathematical formulation for the problem is presented. In addition, a decomposition model is developed which allows for computing optimal solutions in a reasonable time. A multi-order best fit heuristic for the ship placement problem is introduced, and its performance is compared with that of the left-right-left-back heuristic. Experiments on simulated and real-life instances show that the multi-order best fit heuristic beats the other heuristics by a landslide, while maintaining comparable calculation times. Finally, the new heuristic's optimality gap is small, while it clearly outperforms the exact approach with respect to calculation time.

Alle informatie in het Integrated Marine Information System (IMIS) valt onder het VLIZ Privacy beleid Top | Auteurs