Abstract
In this paper we propose a new metaheuristic approach based on sampling for the Orienteering Problem with Stochastic Travel Times (OPSTS). As in many Stochastic Combinatorial Optimization Problems, the computational bottleneck of OPSTS is in the objective function evaluation. For this reason, this study is mainly devoted to the development and integration of on-purpose, sampling-based fast objective function evaluations into metaheuristic methods. In details, we show how a Variable Neighbourhood Search Metaheuristic can be enhanced by adopting such evaluators. Experimental results show that the new sampling-based method is faster than conventional methods for the given problem, and the improvement is particularly relevant for large-scale instances.
V. Papapanagiotou—Supported by the Swiss National Science Foundation through project 200020-156259/1: “Hybrid Sampling-based Metaheuristics for Stochastic Optimization Problems with Deadlines”.
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Papapanagiotou, V., Montemanni, R., Gambardella, L.M. (2016). A Sampling-Based Metaheuristic for the Orienteering Problem with Stochastic Travel Times. In: Martín-Vide, C., Mizuki, T., Vega-Rodríguez, M. (eds) Theory and Practice of Natural Computing. TPNC 2016. Lecture Notes in Computer Science(), vol 10071. Springer, Cham. https://doi.org/10.1007/978-3-319-49001-4_8
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