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- Áurea Celeste Ribeiro, Allan Kardec Barros, Ewaldo Santana, José Carlos Príncipe
- 2015

Introduction Diabetes patients can benefit significantly from early diagnosis. Thus, accurate automated screening is becoming increasingly important due to the wide spread of that disease. Previous studies in automated screening have found a maximum accuracy of 92.6%. Methods: This work proposes a classification methodology based on efficient coding of the… (More)

- Jonathan A. Queiroz, Patricia H. Moraes Rego, João V. F. Neto, Cristiane C. S. da Silva, Ewaldo Santana, Allan Kardec Barros
- 2014 UKSim-AMSS 16th International Conference on…
- 2014

The proposed methodology is based on development of online algorithms for approximate solutions of the Hamilton-Jacobi-Bellman (HJB) equation through a family of non-squares approximators for critic adaptive solution of the Discrete Algebraic Riccati Equation (DARE), associated with the problem of Discrete Linear Quadratic Regulator (DLQR). The proposed… (More)

- Eder Santana, José Carlos Príncipe, Ewaldo Santana, Allan Kardec Barros
- Signal Processing
- 2012

- E. P. da Silva, C. A. Estombelo-Montesco, Ewaldo Santana
- 2015 Brazilian Conference on Intelligent Systems…
- 2015

Machine learning algorithms are used in many areas, in signal processing, the adaptive filtering has been used in many jobs as smooth, prediction, equalization, etc. The Least Mean Square (LMS) algorithm is a successful example of this approach, this algorithm takes the instantaneous gradient of the cost function in his learning process. Nevertheless,… (More)

- Cristiane C. S. da Silva, Allan Kardec Barros, +4 authors José Carlos Príncipe
- Signal Processing
- 2015

- Watson R. M. Santos, Jonathan A. Queiroz, João Viana da Fonseca Neto, Patricia H. Moraes Rego, Ewaldo Santana, Gustavo Araújo de Andrade
- 2014 UKSim-AMSS 16th International Conference on…
- 2014

In this paper, a method to design online optimal policies that encompasses Hamilton-Jacobi-Bellman (HJB) equation solution approximation and heuristic dynamic programming (HDP) approach is proposed. Recursive least squares (RLS) algorithms are developed to approximate the HJB equation solution that is supported by a sequence of greedy policies. The proposal… (More)

- Ewaldo Santana, Allan Kardec Barros, Christian Jutten, Eder Santana, Luis Claudio Oliveira
- BIOSIGNALS
- 2016

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