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• W3046197868 abstract "Population-based memetic algorithms have been successfully applied to solve many difficult combinatorial problems. Often, a population of fixed size is used in such algorithms to record some best solutions sampled during the search. However, given the particular features of the problem instance under consideration, a population of variable size would be more suitable to ensure the best search performance possible. In this work, we propose a variable population memetic search (VPMS), where a strategic population sizing mechanism is used to dynamically adjust the population size during the search process. Our VPMS approach starts its search from a small population of only two solutions to focus on exploitation and then adapts the population size according to the search status to continuously influence the balancing between exploitation and exploration. We illustrate an application of the VPMS approach to solve the challenging critical node problem (CNP). We show that the VPMS algorithm integrating a variable population, an effective local optimization procedure, and a backbone-based crossover operator performs very well compared to state-of-the-art CNP algorithms. The algorithm is able to discover new upper bounds for 12 instances out of the 42 popular benchmark instances while matching 23 previous best-known upper bounds." @default.
• W3046197868 created "2020-08-03" @default.
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• W3046197868 date "2021-02-01" @default.
• W3046197868 modified "2023-10-06" @default.
• W3046197868 title "Variable Population Memetic Search: A Case Study on the Critical Node Problem" @default.
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• W3046197868 doi "https://doi.org/10.1109/tevc.2020.3011959" @default.
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