Search Results - "Costa, João C.W.A."

Surface Plasmon Resonance sensor based on a D-shaped photonic crystal fiber with a bimetallic layer by Cardoso, Markos P., Silva, Anderson O., Romeiro, Amanda F., Giraldi, M. Thereza R., Costa, João C.W.A., Santos, José. L., Baptista, José. M., Guerreiro, Ariel

“…The investigation of a D-shaped photonic crystal fiber sensor with a bimetallic layer for operation at the visible and infrared spectra is presented. The…”
Get full text

Damage‐sensitive feature extraction with stacked autoencoders for unsupervised damage detection by Silva, Moisés Felipe, Santos, Adam, Santos, Reginaldo, Figueiredo, Eloi, Costa, João C.W.A.

“…Summary In most real‐world monitoring scenarios, the lack of measurements from damaged conditions requires the application of unsupervised approaches, mainly…”
Get full text

Finite Element–Based Machine-Learning Approach to Detect Damage in Bridges under Operational and Environmental Variations by Figueiredo, Eloi, Moldovan, Ionut, Santos, Adam, Campos, Pedro, Costa, João C. W. A

“…AbstractIn the last decades, the long-term structural health monitoring of civil structures has been mainly performed using two approaches: model based and…”
Get full text

Agglomerative concentric hypersphere clustering applied to structural damage detection by Silva, Moisés, Santos, Adam, Santos, Reginaldo, Figueiredo, Eloi, Sales, Claudomiro, Costa, João C.W.A.

“…•A novel clustering algorithm for structural damage detection under normal conditions.•A data density-based approach to automatically estimate the number of…”
Get full text

Genetic‐based EM algorithm to improve the robustness of Gaussian mixture models for damage detection in bridges by Santos, Adam, Figueiredo, Eloi, Silva, Moisés, Santos, Reginaldo, Sales, Claudomiro, Costa, João C. W. A.

“…Summary During the service life of bridges, the bridge management systems (BMSs) seek to handle all performed assessment activities by controlling regular…”
Get full text

A global expectation-maximization based on memetic swarm optimization for structural damage detection by Santos, Adam, Silva, Moisés, Santos, Reginaldo, Figueiredo, Eloi, Sales, Claudomiro, Costa, João C. W. A.

“…During the service life of engineering structures, structural management systems attempt to manage all the information derived from regular inspections,…”
Get full text

D-Shaped Photonic Crystal Fiber SPR Sensor for Humidity Monitoring in Oils by Romeiro, Amanda F., Rodrigues, Hudson J.B., Miranda, Cauã C., Cardoso, Markos P., Silva, Anderson O., Costa, João C.W.A., Giraldi, M. Thereza R., Santos, Jose L., Guerreiro, Ariel

“…This theoretical study presents a D-shaped photonic crystal fiber (PCF) surface plasmon resonance (SPR) based sensor designed for humidity detection in…”
Get full text

Coil-shaped Optical Fiber Sensor for Compression Measurements by Romeiro, Amanda F., Cardoso, Victor H.R., de Souza, Marcos F.C., Caldas, Paulo, Giraldi, M. Thereza R., Frazão, Orlando, Santos, José L., Costa, João C.W.A.

“…This study investigated the effectiveness of a coil-shaped optical fiber interferometric sensor, with a diameter of 13 mm, for measuring compression. The…”
Get full text

Deep principal component analysis: An enhanced approach for structural damage identification by Silva, Moisés, Santos, Adam, Santos, Reginaldo, Figueiredo, Eloi, Sales, Claudomiro, Costa, João CWA

“…The structural health monitoring relies on the continuous observation of a dynamic system over time to identify its actual condition, detect abnormal…”
Get full text

A semi-autonomous particle swarm optimizer based on gradient information and diversity control for global optimization by Santos, Reginaldo, Borges, Gilvan, Santos, Adam, Silva, Moisés, Sales, Claudomiro, Costa, João C.W.A.

“…•A semi-autonomous particle swarm optimizer (SAPSO) is proposed for global optimization.•The SAPSO algorithm uses gradient-based information and diversity…”
Get full text

Nonnegative matrix factorization-based blind source separation for full-field and high-resolution modal identification from video by Silva, Moisés, Martinez, Bridget, Figueiredo, Eloi, Costa, João C.W.A., Yang, Yongchao, Mascareñas, David

“…Traditional modal analysis requires physically attached sensors for data acquisition and vibration-based monitoring. Although traditional modal analysis…”
Get full text

3D structural vibration identification from dynamic point clouds by Silva, Moisés Felipe, Green, Andre, Morales, John, Meyerhofer, Peter, Yang, Yongchao, Figueiredo, Eloi, Costa, João C.W.A., Mascareñas, David

“…Video-based measurement has received increased attention for modal analysis and nondestructive evaluation, playing an important role in the development of the…”
Get full text

A novel unsupervised approach based on a genetic algorithm for structural damage detection in bridges by Silva, Moisés, Santos, Adam, Figueiredo, Eloi, Santos, Reginaldo, Sales, Claudomiro, Costa, João C.W.A.

“…This paper proposes a novel unsupervised and nonparametric genetic algorithm for decision boundary analysis (GADBA) to support the structural damage detection…”
Get full text

Mutual equidistant-scattering criterion: A new index for crisp clustering by Flexa, Caio, Santos, Reginaldo, Gomes, Walisson, Sales, Claudomiro, Costa, João C.W.A.

“…•A new non-parametric internal validity index is proposed for crisp clustering.•The index is based on within-cluster mutual equidistant-scattering.•It is…”
Get full text

Spatio-temporal decomposition of 2D travelling waves from video measurements by Silva, Moisés, Figueiredo, Eloi, Costa, João C.W.A., Mascareñas, David

“…•A novel output-only approach for video-based blind source separation.•Timing-based approach for dynamic monitoring of infrastructures.•Automated motion…”
Get full text

A Global Expectation-Maximization Approach Based on Memetic Algorithm for Vibration-Based Structural Damage Detection by Santos, Adam, Santos, Reginaldo, Silva, Moises, Figueiredo, Eloi, Sales, Claudomiro, Costa, Joao C. W. A.

“…This paper proposes a novel unsupervised damage detection approach based on a memetic algorithm that establishes the normal or undamaged condition of a…”
Get full text

A rotationally invariant semi-autonomous particle swarm optimizer with directional diversity by Santos, Reginaldo, Borges, Gilvan, Santos, Adam, Silva, Moisés, Sales, Claudomiro, Costa, João C.W. A.

“…The semi-autonomous particle swarm optimizer (SAPSO) [1] is a relatively recent algorithm for global continuous optimization based on gradient direction and…”
Get full text

Empirical study on rotation and information exchange in particle swarm optimization by Santos, Reginaldo, Borges, Gilvan, Santos, Adam, Silva, Moisés, Sales, Claudomiro, Costa, João C.W.A.

“…This paper investigates whether rotational variance and information exchange affect the performance of Particle Swarm Optimization (PSO) algorithms. Four PSO…”
Get full text

Experimental investigation of a strain gauge sensor based on Fiber Bragg Grating for diameter measurement by Cardoso, Victor H.R., Caldas, Paulo, Giraldi, M. Thereza R., Frazão, Orlando, de Carvalho, Claudio J. Reis, Costa, João C.W.A., Santos, José L.

“…•Use of a taper as an elastic element to increase the sensor dynamic range.•The strain sensitivity is a function of the taper diameter and total length of the…”
Get full text

Adaptive Hybrid Precoding Strategy for Cell-Free Massive MIMO by Mathe, Dercio M., Acatauassu, Diogo, Borges, Gilvan S., Rodrigues, Roberto M., Cavalcante, André M., Marquezini, Maria V., Almeida, Igor, Costa, João C. W. A.

“…Abstract This work presents an adaptive hybrid signal precoding strategy for Cell-Free (CF) Massive multiple-input multiple-output (MIMO) systems. The proposed…”
Get full text