Hybrid Metaheuristics: 10th International Workshop, HM 2016, by Maria J. Blesa, Christian Blum, Angelo Cangelosi, Vincenzo

By Maria J. Blesa, Christian Blum, Angelo Cangelosi, Vincenzo Cutello, Alessandro Di Nuovo, Mario Pavone, El-Ghazali Talbi

This ebook constitutes the refereed court cases of the tenth overseas Workshop on Hybrid Metaheuristics, HM 2016, held in Plymouth, united kingdom, in June 2016.

The 15 revised complete papers offered have been rigorously reviewed and chosen from forty three submissions. the chosen papers are of curiosity for all of the researchers engaged on integrating metaheuristics with different parts for fixing either optimization and constraint delight difficulties. They characterize besides a pattern of present examine demonstrating how metaheuristics will be built-in with integer linear programming and different operational learn suggestions for tackling tough and correct problems.

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Extra info for Hybrid Metaheuristics: 10th International Workshop, HM 2016, Plymouth, UK, June 8-10, 2016, Proceedings

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2) contains an exponential number of binary variables and can, therefore, only be solved to optimality in the context of problem instances of small and medium size. The obtained results show that, indeed, the application of CMSA obtains state-of-the-art results, especially in the context of large problem instances. The remaining part of the paper is organized as follows. In Sect. 2 we provide a technical description of the unbalanced minimum common string partition problem. Moreover, we describe the first ILP model for this problem.

The tuning process for each alphabet size was given a budget of 1000 runs of Cmsa, where each run was given a computation time limit of 3600 CPU seconds. Finally, the following parameter value ranges were chosen concerning the five parameters of Cmsa: – na ∈ {10, 30, 50}. – agemax ∈ {1, 5, 10, inf}, where inf means that no common block is ever removed from sub-instance B . Table 1. Results of tuning CMSA with irace. 9 10 480 24 C. 9 means that solution constructions are nearly deterministic. – lsize ∈ {3, 5, 10}.

4, the application of CMSA to the tackled problem is outlined. Finally, Sect. 5 provides an extensive experimental evaluation and Sect. 6 offers a discussion and an outlook to future work. 2 Unbalanced Minimum Common String Partition The UMCSP problem can technically be described as follows. Given is an input string s1 of length n1 and an input string s2 of length n2 , both over the same finite alphabet Σ. A valid solution to the UMCSP problem is obtained by partitioning s1 into a set P1 of non-overlapping substrings, and s2 into a set P2 of nonoverlapping substrings, such that exists a set S with S ⊆ P1 and S ⊆ P2 and no letter a ∈ Σ is simultaneously present in a string x ∈ P1 \S and a string y ∈ P2 \S.

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