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Publicações

2022

On the localization of an acoustic target using a single receiver

Autores
Ferreira, B; Alves, J; Cruz, N; Graca, P;

Publicação
2022 OCEANS HAMPTON ROADS

Abstract
This paper addresses the localization of an unsynchronized acoustic source using a single receiver and a synthetic baseline. The enclosed work was applied in a real search of an electric glider that was lost at sea and later recovered, using the described approach. The search procedure is presented along with the localization methods and a metric based on the eigenvalues of the Fisher Information Matrix is used to quantify the expected uncertainty of the estimate.

2022

Report on the 2nd Linked Archives International Workshop (LinkedArchives 2022) at TPDL 2022

Autores
Lopes, CT; Ribeiro, C; Niccolucci, F; Villalón, MP; Freire, N;

Publicação
SIGIR Forum

Abstract

2022

Pattern Recognition and Image Analysis

Autores
Pinho, AJ; Georgieva, P; Teixeira, LF; Sánchez, JA;

Publicação
Lecture Notes in Computer Science

Abstract

2022

Intelligent Simulation and Emulation Platform for Energy Management in Buildings and Microgrids

Autores
Pinto T.; Gomes L.; Faria P.; Vale Z.; Teixeira N.; Ramos D.;

Publicação
Intelligent Systems Reference Library

Abstract
Recent commitments and consequent advances towards an effective energy transition are resulting in promising solutions but also bringing out significant new challenges. Models for energy management at the building and microgrid level are benefiting from new findings in distinct areas such as the internet of things or machine learning. However, the interaction and complementarity between such physical and virtual environments need to be validated and enhanced through dedicated platforms. This chapter presents the Multi-Agent based Real-Time Infrastructure for Energy (MARTINE), which provides a platform that enables a combined assessment of multiple components, including physical components of buildings and microgrids, emulation capabilities, multi-agent and real-time simulation, and intelligent decision support models and services based on machine learning approaches. Besides enabling the study and management of energy resources considering both the physical and virtual layers, MARTINE also provides the means for a continuous improvement of the synergies between the Internet of Things and machine learning solutions.

2022

Indoor location infrastructure for time management tools: a case study

Autores
Teixeira, A; Silva, H; Araujo, RE;

Publicação
Proceedings - 2022 International Young Engineers Forum in Electrical and Computer Engineering, YEF-ECE 2022

Abstract
Indoor localization systems are an important topic in the field of manufacturing process. A computational infrastructure based on Bluetooth low energy technology with state estimators for filtering is used to localize employees in the shop floor. The researchers' motivation is two-folds: implement an indoor tracking system while promoting manage production time. In this paper, we discuss the first prototype of a localization system adapted to address these goals. Experimental results show that the system for our case study, achieves a localization accuracy of less than three meters. © 2022 IEEE.

2022

Fracture characterisation of bone-cement bonded joints under mode I loading

Autores
Campos, TD; Barbosa, MLS; Olmos, AAR; Martins, M; Pereira, FAM; De Moura, MFSF; Zille, A; Dourado, N;

Publicação
THEORETICAL AND APPLIED FRACTURE MECHANICS

Abstract
Over the years, many techniques have been developed for the stabilisation of bone fractures. The study of the adhesion of bone-to-bone cement is an important step towards the development of new immobilization systems. Although bone cement has been used for more than fifty years, very few studies have been performed regarding the evaluation of fracture properties. In this work, numerical and experimental investigations were conducted to evaluate the strain energy release rate under mode I loading in a bone-cement bonded joint, using the Double Cantilever Beam (DCB) test. Cohesive zone laws were also measured combining the finite element method with non-linear elastic fracture mechanics. This has been made in a cortical bone bonded joint with polymethylmethacrylate (PMMA). Consistent results have been obtained regarding fracture toughness in a widely used bone-to-bone cement joint in many biomedical applications.

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