Résumé (EN)

The successful application of differential evolution (DE) algorithms to various real-valued problems encourages to develop some integer-coded versions of DE for working directly with integer and discrete variables of a problem. However, in most of those works, actually a real-valued solution is just converted into a desired integer-valued solution by applying some decoding mechanisms. Only a limited number of works are found, in which attempts are made for developing an actual integer-coded DE. In this article, a novel version of DE is proposed which can work directly with real, integer and discrete variables of a problem without any conversion. Applying to two non-linear real-integer-discrete-valued engineering design problems, the proposed DE is found successful in obtaining the known best solutions of the problems.