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Browsing by Author "Prestwich, Steven D."

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    Citation Count: Prestwich, Steven D.; Rossi, Roberto; Tarim, S. Armagan, "Randomness as a constraint" Principles And Practice Of Constraint Programming, Cp 2015, Vol.9255, pp.351-366, (2015).
    Randomness as a constraint
    (Springer-Verlag Berlin, 2015) Prestwich, Steven D.; Rossi, Roberto; Tarım, S. Armağan
    Some optimisation problems require a random-looking solution with no apparent patterns, for reasons of fairness, anonymity, undetectability or unpredictability. Randomised search is not a good general approach because problem constraints and objective functions may lead to solutions that are far from random. We propose a constraint-based approach to finding pseudo-random solutions, inspired by the Kolmogorov complexity definition of randomness and by data compression methods. Our "entropy constraints" can be implemented in constraint programming systems using well-known global constraints. We apply them to a problem from experimental psychology and to a factory inspection problem.