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Hybridizing Evolutionary Multi-objective Algorithm Using Random Mutations and Local Searches

  • Riddhiman Saikia
  • Deepak SharmaEmail author
Conference paper
Part of the Lecture Notes on Multidisciplinary Industrial Engineering book series (LNMUINEN)

Abstract

Multi-Objective Evolutionary Algorithms (MOEAs) have been successful in solving mathematical and real-world multi-objective optimization problems by evolving a set of optimal solutions, which are known as Pareto-optimal solutions. However, there are certain limitations with those algorithms such as slow convergence, lack of effective terminating condition to name a few. To address such challenges, hybrid MOEAs are being designed and studied where the global exploration power of MOEAs are combined with local exploitation modules of various numerical optimization techniques. However, hybridization itself brings new challenges in its implementation. In this work, a hybrid MOEA is presented in which random mutations are performed on the initial population to start with a better and diverse set of solutions. Moreover, a local search module is coupled to execute periodically on a least crowded non-dominated solution at a certain interval of generations. The proposed algorithm is tested on a set of benchmark multi-objective optimization problems and compared with the NSGA-II. The convergence plots demonstrate the superiority of the proposed algorithm over NSGA-II.

Keywords

Hybrid multi-objective algorithm Memetic algorithm Mutation Local search NSGA-II 

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Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringIndian Institute of Technology GuwahatiGuwahatiIndia

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