Jaime A. Ramírez

Learn More
In this paper, we analyze four dominance criteria in terms of their ability to adequately order sets of points in multiand many-objective optimization problems. The use of relaxed and alternative dominance relationships has been an important tool for improving the performance of multiobjective evolutionary optimization algorithms, and their ordering ability(More)
<lb>Complex networks can model the structure and dynamics of different types of<lb>systems. It has been shown that they are characterized by a set of measures.<lb>In this work, we evaluate the variability of complex networks measures face to<lb>perturbations and, for this purpose, we impose controlled perturbations and<lb>quantify their effect. We analyze(More)
In contrast to speech recognition, whose speech features have been extensively explored in the research literature, feature extraction in Sign Language Recognition (SLR) is still a very challenging problem. In this paper we present a methodology for feature extraction in Brazilian Sign Language (BSL, or LIBRAS in Portuguese) that explores the phonological(More)
In this paper, we introduce an approach for the design of electromagnetic devices based on the use of Estimation of Distribution Algorithms (EDAs), coupled with approximation-based local search around the most promising solutions. The main idea is to combine the power of EDAs in the solution of hard optimization problems with the faster convergence provided(More)
The TEAM benchmark problem 22 is an important optimization problem in electromagnetic design, which can be formulated as a constrained mono-objective problem or a multiobjective one with two objectives. In this paper, we propose a multiobjective version with three objectives, whose third objective is related to the quench constraint and the better use of(More)
Departamento de Matemática, Universidade Federal de Ouro Preto, Ouro Preto, MG 35400-000, Brazil Department of Electrical Engineering, Federal University of Minas Gerais, Belo Horizonte, MG 31270-010, Brazil Department of Mathematics, Federal University of Minas Gerais, Belo Horizonte, MG 31270-010, Brazil Department of Electrical and Computer Engineering,(More)
This paper proposes a structure of classes that uses the concepts of object-oriented programming to develop a library based on computational intelligence techniques for optimization in electromagnetics. In this library, artificial neural networks and neurofuzzy networks are considered. Based on this division, the required classes for the library(More)