2019
Authors
Simões, D; Barbosa, B; Filipe, S;
Publication
Advances in Marketing, Customer Relationship Management, and E-Services
Abstract
No abstract available.
2019
Authors
Campos, J; Sharma, P; Albano, M; Jantunen, E; Baglee, D; Ferreira, LL;
Publication
2019 6TH INTERNATIONAL CONFERENCE ON CONTROL, DECISION AND INFORMATION TECHNOLOGIES (CODIT 2019)
Abstract
The emergence of new Information and Communication Technologies, such as the Internet of Things and big data and data analytics provides opportunities as well as challenges for the domain of interest, and this paper discusses their importance in condition monitoring and maintenance. In addition, the Open system architecture for condition-based maintenance (OSA-CBM), and the Predictive Health Monitoring methods are gone through. Thereafter, the paper uses bearing fault data from a simulation model with the aim to produce vibration signals where different parameters of the model can be controlled. In connection to the former mentioned a prototype was developed and tested for purposes of simulated rolling element bearing fault systems signals with appropriate fault diagnostic and analytics. The prototype was developed taking into consideration recommended standards (e.g., the OSA-CBM). In addition, the authors discuss the possibilities to incorporate the developed prototype into the Arrowhead framework, which would bring possibilities to: analyze various equipment geographically dispersed, especially in this case its rolling element bearing; support servitization of Predictive Health Monitoring methods and large-scale interoperability; and, to facilitate the appearance of novel actors in the area and thus competition.
2019
Authors
Faia R.; Pinto T.; Vale Z.; Corchado J.M.;
Publication
Energy Informatics
Abstract
In many large-scale and time-consuming problems, the application of metaheuristics becomes essential, since these methods enable achieving very close solutions to the exact one in a much shorter time. In this work, we address the problem of portfolio optimization applied to electricity markets negotiation. As in a market environment, decision-making is carried out in very short times, the application of the metaheuristics is necessary. This work proposes a Hybrid model, combining a simplified exact resolution of the method, as a means to obtain the initial solution for a Particle Swarm Optimization (PSO) approach. Results show that the presented approach is able to obtain better results in the metaheuristic search process.
2019
Authors
Sa, JC; Amaral, A; Barreto, L; Carvalho, F; Santos, G;
Publication
INTERNATIONAL JOURNAL FOR QUALITY RESEARCH
Abstract
Quality Management has been one of the most dominating and pervasive managerial approaches all over the world during the last three decades. The questionnaire of this study included different information, of where we can highlight: the perception of the importance having implemented the ISO 9001 standard; the most used quality tools/techniques in the professional activities. As main conclusions we can highlight: women attach great importance to the implementation of the ISO 9001 standard, namely as regards on customer satisfaction, in the competitiveness of the Organization and in the relationship with customers and give less importance in individual performance, in motivation of professionals and in the evolution of sales. Men value the implementation of the ISO 9001 more, namely regarding to the relationship with customers, in the management mode and they give less importance to the evolution of sales and to the motivation of professionals.
2019
Authors
Cunha, B; Lima, J; Silva, M; Leitao, P;
Publication
JOURNAL OF INTELLIGENT & ROBOTIC SYSTEMS
Abstract
2019
Authors
Freitas, S; Silva, H; Almeida, JM; Silva, E;
Publication
INTERNATIONAL JOURNAL OF ADVANCED ROBOTIC SYSTEMS
Abstract
This work addresses a hyperspectral imaging system for maritime surveillance using unmanned aerial vehicles. The objective was to detect the presence of vessels using purely spatial and spectral hyperspectral information. To accomplish this objective, we implemented a novel 3-D convolutional neural network approach and compared against two implementations of other state-of-the-art methods: spectral angle mapper and hyperspectral derivative anomaly detection. The hyperspectral imaging system was developed during the SUNNY project, and the methods were tested using data collected during the project final demonstration, in Sao Jacinto Air Force Base, Aveiro (Portugal). The obtained results show that a 3-D CNN is able to improve the recall value, depending on the class, by an interval between 27% minimum, to a maximum of over 40%, when compared to spectral angle mapper and hyperspectral derivative anomaly detection approaches. Proving that 3-D CNN deep learning techniques that combine spectral and spatial information can be used to improve the detection of targets classification accuracy in hyperspectral imaging unmanned aerial vehicles maritime surveillance applications.
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