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Publicações

2017

Using Functionality/Accessibility Levels for Personalized POI Recommendation

Autores
Santos, F; Almeida, A; Martins, C; de Oliveira, PM; Goncalves, R;

Publicação
RECENT ADVANCES IN INFORMATION SYSTEMS AND TECHNOLOGIES, VOL 1

Abstract
This paper describes a set of models and algorithms used under a Tourism Recommendation System based in Users and Points-of-Interest (POI) profiles. This work aims to propose a recommendation system that considers user's functionality levels regarding physical and psychological issues. This proposal considers also in a different way to classify (POI) including their accessibility levels mapped with similar physical and psychological issues.

2017

Data-Mining-based filtering to support Solar Forecasting Methodologies

Autores
Pinto, T; Marques, L; Sousa, TM; Praca, I; Vale, Z; Abreu, SL;

Publicação
ADCAIJ-ADVANCES IN DISTRIBUTED COMPUTING AND ARTIFICIAL INTELLIGENCE JOURNAL

Abstract
This paper proposes an hybrid approach for short term solar intensity forecasting, which combines different forecasting methodologies with a clustering algorithm, which plays the role of data filter, in order to support the selection of the best data for training. A set of methodologies based on Artificial Neural Networks (ANN) and Support Vector Machines (SVM), used for short term solar irradiance forecast, is implemented and compared in order to facilitate the selection of the most appropriate methods and respective parameters according to the available information and needs. Data from the Brazilian city of Florianopolis, in the state of Santa Catarina, has been used to illustrate the methods applicability and conclusions. The dataset comprises the years of 1990 to 1999 and includes four solar irradiance components as well as other meteorological variables, such as temperature, wind speed and humidity. Conclusions about the irradiance components, parameters and the proposed clustering mechanism are presented. The results are studied and analysed considering both efficiency and effectiveness of the results. The experimental findings show that the hybrid model, combining a SVM approach with a clustering mechanism, to filter the data used for training, achieved promising results, outperforming the approaches without clustering.

2017

A new brain emotional learning simulink toolbox for control systems design

Autores
Coelho, João Paulo; Pinho, Tatiana M.; Boaventura-Cunha, José; Oliveira, Josenalde;

Publicação
IFAC 2017 World Congress

Abstract
The brain emotional learning (BEL) control paradigm has been gathering increased interest by the control systems design community. However, the lack of a consistent mathemat- ical formulation and computer based tools are factors that have prevented its more widespread use. In this article both features are tackled by providing a coherent mathematical framework for both the continuous and discrete-time formulations and by presenting a Simulink R computational tool that can be easily used for fast prototyping BEL based control systems.

2017

Modelling and Simulation Perspective in Service Design

Autores
Dragoicea, M; Falcao e Cunha, J; Alexandru, MV; Constantinescu, DA;

Publicação
Handbook of Research on Strategic Alliances and Value Co-Creation in the Service Industry - Advances in Hospitality, Tourism, and the Services Industry

Abstract

2017

Metalearning

Autores
Brazdil, P; Vilalta, R; Giraud Carrier, CG; Soares, C;

Publicação
Encyclopedia of Machine Learning and Data Mining

Abstract

2017

Identification of Dynamic Simulation Models for Variable Speed Pumped Storage Power Plants

Autores
Moreira, C; Fulgencio, N; Silva, B; Nicolet, C; Beguin, A;

Publicação
HYPERBOLE SYMPOSIUM 2017 (HYDROPOWER PLANTS PERFORMANCE AND FLEXIBLE OPERATION TOWARDS LEAN INTEGRATION OF NEW RENEWABLE ENERGIES)

Abstract
This paper addresses the identification of reduced order models for variable speed pump-turbine plants, including the representation of the dynamic behaviour of the main components: hydraulic system, turbine governors, electromechanical equipment and power converters. A methodology for the identification of appropriated reduced order models both for turbine and pump operating modes is presented and discussed. The methodological approach consists of three main steps: 1) detailed pumped-storage power plant modelling in SIMSEN; 2) reduced order models identification and 3) specification of test conditions for performance evaluation.

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