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Vector-angle penalised NSGA-III to solve many-objective optimisation problems

Vector-angle penalised NSGA-III to solve many-objective optimisation problems

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One of the major challenges in evolutionary many-objective optimisation is to maintain convergence and diversity among Pareto-optimal solutions. Taking both into consideration, this Letter presents a -NSGA-III algorithm which incorporates minimum-vector-angle principle in association operation of original non-dominated sorting genetic algorithm III (NSGA-III) scheme to solve unconstrained many-objective optimisation problems. Each non-dominated population member close to a reference point is emphasised in optimal solution set using minimum vector-angle penalty parameter with perpendicular distance in association operation. Performance evaluation of -NSGA-III algorithm is done over unconstrained DTLZ test suite by computing delta () and inverted generational distance as quality metrics. The improved performance of the suggested algorithm over NSGA-III, MOEA/D and VaEA could be considered as an alternative tool to handle optimisation problems with more than three conflicting objectives.

http://iet.metastore.ingenta.com/content/journals/10.1049/el.2018.7164
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