Search Results - "CERQUEIRA, Augusto S"

Detection and Classification System for Rail Surface Defects Based on Eddy Current by Alvarenga, Tiago A., Carvalho, Alexandre L., Honorio, Leonardo M., Cerqueira, Augusto S., Filho, Luciano M. A., Nobrega, Rafael A.

“…The prospect of growth of a railway system impacts both the network size and its occupation. Due to the overloaded infrastructure, it is necessary to increase…”
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Identification and Localization of Track Circuit False Occupancy Failures Based on Frequency Domain Reflectometry by Alvarenga, Tiago A, Cerqueira, Augusto S, Filho, Luciano M A, Nobrega, Rafael A, Honorio, Leonardo M, Veloso, Henrique

“…Railway track circuit failures can cause significant train delays and economic losses. A crucial point of the railway operation system is the corrective…”
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Identification of Low Impedance Points Along Railway Tracks From a Railroad Inspection Vehicle by Alvarenga, Tiago A., Nobrega, Rafael A., Cerqueira, Augusto S., de Andrade Filho, Luciano M., Honorio, Leonardo M., Rossignoli, Sergio, Veloso, Henrique, Batista, Rafael

“…This work addresses the subject of preventive maintenance of railroads which has a considerable impact on the cost and safety of railway companies by proposing…”
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Sparse Representation for Signal Reconstruction in Calorimeters Operating in High Luminosity by Barbosa, Davis P., De A Filho, Luciano M., Peralva, Bernardo S., Cerqueira, Augusto S., de Seixas, Jose M.

“…A calorimeter signal reconstruction method, based on sparse representation (SR) of redundant data, is proposed for energy reconstruction in particle colliders…”
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Calorimeter Response Deconvolution for Energy Estimation in High-Luminosity Conditions by de A Filho, Luciano M., Peralva, Bernardo S., de Seixas, Jose M., Cerqueira, Augusto S.

“…Signal superposition, also called pile-up noise, has become an important issue for calorimeters operating under high-luminosity conditions. Current techniques…”
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A novel method for power quality multiple disturbance decomposition based on Independent Component Analysis by Lima, Marcelo A.A., Cerqueira, Augusto S., Coury, Denis V., Duque, Carlos A.

“…► We propose a method to decompose a power system signal into its isolated disturbances. ► We use Independent Component Analysis to separate disturbances…”
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Exploiting principal curves for power quality monitoring by Ferreira, Danton D., de Seixas, José M., Cerqueira, Augusto S., Duque, Carlos A.

“…► The paper exploits principal curves (PC) for power quality monitoring. ► PC shows to be efficient for feature extraction, event representation and analysis…”
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A PLL-Based Multirate Structure for Time-Varying Power Systems Harmonic/Interharmonic Estimation by de Carvalho, J.R., Duque, C.A., Ribeiro, M.V., Cerqueira, A.S., Baldwin, T.L., Ribeiro, P.F.

“…This paper describes a phase-locked-loop (PLL)-based power systems harmonic estimation algorithm, which uses an analysis filter bank and multirate processing…”
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Detection of Disturbances in Voltage Signals for Power Quality Analysis Using HOS by Ribeiro, Moisés V., Marques, Cristiano Augusto G., Duque, Carlos A., Cerqueira, Augusto S., Pereira, José Luiz R.

“…This paper outlines a higher-order statistics (HOS)-basedtechnique for detecting abnormal conditions in voltage signals. The main advantage introduced by the…”
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ESPRIT associated with filter bank for power-line harmonics, sub-harmonics and inter-harmonics parameters estimation by Santos, Elaine, Khosravy, Mahdi, Lima, Marcelo A.A., Cerqueira, Augusto S., Duque, Carlos A.

“…•FB ESPRIT a novel harmonics, inter-harmonics, and sub-harmonic parameters estimation.•Theoretical illustration of higher accuracy and robustness compared to…”
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Identification and Classification of Corrupted Signals for the Neutrinos Angra Experiment by Migliorini, Mariana L., Cerqueira, Augusto S., Costa, Igor A., Fernandes, Antonio, Lopes, Guilherme S., Lopes, Amaro S., Nobrega, Rafael A., Pains, Igor F., Souza, David de M., Lima Junior, Herman P., Anjos, Joao C., Chimenti, Pietro, Gonzalez, Luis F. G., Kemp, Ernesto, Pepe, Iury M, Ribeiro, Dion B S, Guedes, Germano P.

“…The Neutrinos Angra Experiment aims at monitoring nuclear plants by detecting antineutrino particles coming out from its fuel burn-up process. The Neutrinos…”
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A method based on independent component analysis for single and multiple power quality disturbance classification by Ferreira, Danton D., Seixas, José M. de, Cerqueira, Augusto S.

“…•It classifies seventeen event classes with a performance above 97% for each class.•It uses the ICA algorithm only in the design stage requiring no clustering…”
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Digital System for Detection and Classification of Power Quality Disturbances by S Cerqueira, Augusto, A Duque, Carlos, V Ribeiro, Moises, M Trindade, Rogerio

“…This paper presents a new method for detection and classification of power quality disturbances which achieves good performance with low computational cost…”
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Method based on independent component analysis for harmonic extraction from power system signals by Ferreira, Danton D., Nagata, Erick A., Ferreira, Silvia C., de Seixas, José M., Duque, Carlos A., Marques, Cristiano A.G., Guedes, Juan D.S., Cerqueira, Augusto S.

“…•We proposed a method based on ICA to extract harmonics from power system signals.•The method is able to extract harmonics with a rapid dynamic response.•It…”
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A new power quality deviation index based on principal curves by Ferreira, Danton D., de Seixas, José M., Cerqueira, Augusto S., Duque, Carlos A., Bollen, Math H.J., Ribeiro, Paulo F.

“…•The principal curves technique is used to construct a new PQ deviation index.•The proposed PQ index is general, i.e., it can be used for any type of…”
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Time-varying harmonic analyzer prototype by Fabri, Diego F, Martins, Carlos H N, Silva, Leandro R M, Duque, Carlos A, Ribeiro, Paulo F, Cerqueira, Augusto S

“…This paper presents a time-varying harmonic analyzer based on the Sliding Window DFT implemented on a DSP platform. The harmonic decomposition is carried out…”
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A principal component-based algorithm for denoising in single channel data (PCA for denoising in single channel data) by Miranda de Sá, Antonio Mauricio F.L., de Seixas, José Manoel, Costa Junior, José Dilermando, Ferreira, Danton Diego, Cerqueira, Augusto S.

“…A denoising technique for single channel data is proposed. By assuming the observed signal to be the mixture of two unknown uncorrelated sources, an expression…”
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Fundamental Component Phasor Estimation in Presence of DC Exponential Decay, Harmonics and Noise by de Oliveira, André D., Silva, Leandro R. M., Duque, Carlos A., Cerqueira, Augusto S.

“…Phasor estimation of the fundamental component is a necessary task for many power system applications. This work is targeted to applications of transmission…”
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A method for PQ multiple disturbance decomposition based on digital filtering and Independent Component Analysis by Lima, M. A. A., Coury, D. V., Cerqueira, A. S.

“…This paper proposes a method for Power Quality disturbance analysis based on Independent Component Analysis. This method aims to decompose power system signals…”
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Detection of disturbances in voltage signals for power quality analysis using HOS: Emerging signal processing techniques for power quality applications by RIBEIRO, Moisés V, MARQUES, Cristiano Augusto G, DUQUE, Carlos A, CERQUEIRA, Augusto S, PEREIRA, José Luiz R

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