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Self-adaptive fitness formulation for constrained optimization

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2 Author(s)
Farmani, R. ; Sch. of Eng. & Comput. Sci., Univ. of Exeter, Devon, UK ; Wright, J.A.

A self-adaptive fitness formulation is presented for solving constrained optimization problems. In this method, the dimensionality of the problem is reduced by representing the constraint violations by a single infeasibility measure. The infeasibility measure is used to form a two-stage penalty that is applied to the infeasible solutions. The performance of the method has been examined by its application to a set of eleven test cases from the specialized literature. The results have been compared with previously published results from the literature. It is shown that the method is able to find the optimum solutions. The proposed method requires no parameter tuning and can be used as a fitness evaluator with any evolutionary algorithm. The approach is also robust in its handling of both linear and nonlinear equality and inequality constraint functions. Furthermore, the method does not require an initial feasible solution.

Published in:

Evolutionary Computation, IEEE Transactions on  (Volume:7 ,  Issue: 5 )

Date of Publication:

Oct. 2003

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