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A portable spatial monitoring system for autonomous heart diagnosis

A portable spatial monitoring system for autonomous heart di...

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2013 IEEE 15th International Conference on e-Health Networking, Applications and Services, Healthcom 2013

作者： Meireles, Antonio Figueiredo, Lino Lopes, Luis Seabra GECAD Knowledge Engineering and Decision Support Research Center Aveiro 3810-193 Portugal GECAD Knowledge Engineering and Decision Support Research Center Porto 4200-072 Portugal

ISBN: (纸本)9781467358019

Heart disorders are one of the most problematic issues of human health. There are currently many efforts to reduce the time for first assistance based on electronic systems that continuously records the electric heart activity for further inspection and anomalies detection. The most popular are portable monitoring systems based on the Electrocardiogram (ECG) signal. However, an efficient detection of heart problems still being a big challenge mainly due to the difficulty of accessing some specific cardiac problems and signal variations between different patients. A different technique for heart diagnosing is based on spatial recording of electrical heart activity, commonly known as Vectorcardiogram (VCG). VCG is pointed by several authors as a more efficient tool than ECG for heart inspection and problem detection. This research explores the possibility of using VCG signals in a portable device for constant heart monitoring and injuries detection. It is presented a portable solution with VCG recording and digital signal processing for automatic diagnosis. This paper covers the aspects of the VCG signal and its ability to be converted into a 12-lead ECG signal. It is also presented a system for automatic diagnosis based on VCG which is based on a multichannel portable hardware platform to support noise cancellation, parameter extraction and decision making algorithms. © 2013 IEEE.

关键词： Heart

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An agent-based electronic market simulator enhanced with ontology matching services and emergent social networks

An agent-based electronic market simulator enhanced with ont...

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25th European Modeling and Simulation Symposium, EMSS 2013

作者： Nascimento, Virgínia Viamonte, Maria João Canito, Alda Silva, Nuno GECAD Knowledge Engineering and Decision Support Research Center Institute of Engineering Porto Portugal

ISBN: (纸本)9788897999225

AEMOS is a simulator which aims to support the development of agent-based electronic markets capable of dealing with the natural semantic heterogeneity existent in this kind of environment. AEMOS simulates a marketplace which provides ontology matching services, enhanced with the exploitation of emergent social networks, enabling an efficient and transparent communication between agents, even when they use different ontologies. The system recommends possible alignments between the agent's ontologies, and lets them negotiate and decide which alignment should be used to translate the exchanged messages. In this paper we propose a new ontology alignment negotiation process, which promotes the reutilization and combination of already existent alignments, as well as the involvement of the business agents in the alignment composition process. With this new model, we aim to achieve a higher adequacy of the used alignments, as well as a more accurate and trustful evaluation of the alignments. © 2013 DIME UNIVERSITÀ DI GENOVA.

关键词： Semantics

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Study of load curves concerning the influence of socioeconomic and cultural issues

Study of load curves concerning the influence of socioeconom...

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IEEE PES Innovative Smart Grid Technologies Conference Europe (ISGT Europe)

作者： Danilo S. Gastaldello André N. de Souza Haroldo L. M. do Amaral Pedro Faria Zita Vale Department of Electrical Engineering Polytechnic School USP-University of São Paulo Department of Electrical Engineering UNESP - São Paulo State University GECAD - Knowledge Engineering and Decision Support Research Center IPP - Polytechnic Institute of Porto

ISBN: (纸本)9781479977215

The increase of electricity demand in Brazil, the lack of the next major hydroelectric reservoirs implementation, and the growth of environmental concerns lead utilities to seek an improved system planning to meet these energy needs. The great diversity of economic, social, climatic, and cultural conditions in the country have been causing a more difficult planning of the power system. The work presented in this paper concerns the development of an algorithm that aims studying the influence of the issues mentioned in load curves. Focus is given to residential consumers. The consumption device with highest influence in the load curve is also identified. The methodology developed gains increasing importance in the system planning and operation, namely in the smart grids context.

关键词： Economics Cultural differences Meteorology Energy consumption Planning Algorithm design and analysis Smart grids

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Energy resources management in three distinct time horizons considering a large variation in wind power

Energy resources management in three distinct time horizons ...

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European Wind Energy Conference and Exhibition, EWEC 2013

作者： Silva, Marco Morais, Hugo Sousa, Tiago Vale, Zita GECAD - Knowledge Engineering and Decision Support Research Center Polytechnic Institute of Porto Portugal

ISBN: (纸本)9781632663146

The intensive use of distributed generation based on renewable resources increases the complexity of power systems management, particularly the short-term scheduling. Demand response, storage units and electric and plug-in hybrid vehicles also pose new challenges to the short-term scheduling. However, these distributed energy resources can contribute significantly to turn the shortterm scheduling more efficient and effective improving the power system reliability. This paper proposes a short-term scheduling methodology based on two distinct time horizons: hour-ahead scheduling, and real-time scheduling considering the point of view of one aggregator agent. In each scheduling process, it is necessary to update the generation and consumption operation, and the storage and electric vehicles status. Besides the new operation condition, more accurate forecast values of wind generation and consumption are available, for the resulting of short-term and very short-term methods. In this paper, the aggregator has the main goal of maximizing his profits while, fulfilling the established contracts with the aggregated and external players.

关键词： Plug-in hybrid vehicles

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Short-term wind forecasting to support virtual power player operation

Short-term wind forecasting to support virtual power player ...

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European Wind Energy Conference and Exhibition, EWEC 2013

作者： Ramos, Sérgio Soares, João Pinto, Tiago Vale, Zita GECAD - Knowledge Engineering and Decision-Support Research Center Polytechnic Institute of Porto Portugal

ISBN: (纸本)9781632663146

This paper proposes a wind speed forecasting model that contributes to the development and implementation of adequate methodologies for Energy Resource Management in a distribution power network, with intensive use of wind based power generation. The proposed forecasting methodology aims to support the operation in the scope of the intraday resources scheduling model, namely with a time horizon of 10 minutes. A case study using a real database from the meteorological station installed in the gecad renewable energy lab was used. A new wind speed forecasting model has been implemented and it estimated accuracy was evaluated and compared with a previous developed forecasting model. Using as input attributes the information of the wind speed concerning the previous 3 hours enables to obtain results with high accuracy for the wind shortterm forecasting.

关键词： Virtual Power Plants

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Multi-agent Simulation of Bilateral Contracting in Competitive Electricity Markets

Multi-agent Simulation of Bilateral Contracting in Competiti...

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International Workshop on Database and Expert Systems Applications

作者： Fernando Lopes Hugo Algarvio Jorge A.M. Sousa Helder Coelho Tiago Pinto Gabriel Santos Zita Vale Isabel Praça LNEG-National Research Institute Lisbon Portugal ISEL-Instituto Superior Engenharia Lisboa and INESC-ID Lisbon Portugal University of Lisbon Campo Grande Lisbon Portugal GECAD-Knowledge Engineering Decision Support Research Center Porto Portugal

Traditional vertically integrated power utilities around the world have evolved from monopoly structures to open markets that promote competition among suppliers and provide consumers with a choice of services. Market forces drive the price of electricity and reduce the net cost through increased competition. Electricity can be traded in both organized markets or using forward bilateral contracts. This article focuses on bilateral contracts and describes some important features of an agent-based system for bilateral trading in competitive markets. Special attention is devoted to the negotiation process, demand response in bilateral contracting, and risk management. The article also presents a case study on forward bilateral contracting: a retailer agent and a customer agent negotiate a 24h-rate tariff.

关键词： Contracts Electricity supply industry Risk management Load management Electricity Proposals Conferences

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Step count algorithm adapted to indoor localization

Step count algorithm adapted to indoor localization

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6th International C* Conference on Computer Science and Software engineering, C3S2E 2013

作者： Terra, Rui Figueiredo, Lino Barbosa, Ramiro Anacleto, Ricardo GECAD - Knowledge Engineering and Decision Support Research Center School of Engineering - Polytechnic of Porto Portugal

ISBN: (纸本)9781450319768

This paper presents a step count algorithm designed to work in real-time using low computational power. This proposal is our first step for the development of an indoor navigation system, based on Pedestrian Dead Reckoning (PDR). We present two approaches to solve this problem and compare them based in their error on step counting, as well as, the capability of their use in a real time system. © 2013 Authors.

关键词： Inertial navigation systems

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Neural control of an autonomous robot

Neural control of an autonomous robot

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IEEE International Conference on Autonomous Robot Systems and Competitions (ICARSC)

作者： Adriano B. Pinto Ramiro S. Barbosa Manuel F. Silva ISEP/IPP-School of Engineering Polytechnic of Porto Porto Portugal GECAD-Knowledge Engineering and Decision Support Research Center Polytechnic of Porto Porto Portugal INESC TEC-INESC Technology and Science (formerly INESC Porto) Polytechnic of Porto Porto Portugal

This article aims to apply the concepts associated with artificial neural networks (ANN) in the control of an autonomous robot system that is intended to be used in competitions of robots. The robot was tested in several arbitrary paths in order to verify its effectiveness. The results show that the robot performed the tasks with success. Moreover, in the case of arbitrary paths the ANN control outperforms other methodologies, such as fuzzy logic control (FLC).

关键词： Artificial neural networks Robots Sonar Training Wheels Bluetooth Control systems

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Analysis of Consumption Data to Detect Commercial Losses Using Performance Evaluation Methods in a Smart Grid

Analysis of Consumption Data to Detect Commercial Losses Usi...

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IEEE PES Transmission and Distribution Conference and Exposition

作者： Pedro Faria Zita Vale Andre Souza GECAD - Knowledge Engineering and Decision Support Research Center IPP - Polytechnic Institute of Porto Department of Electrical Engineering UNESP - Universidade Estadual Paulista

ISBN: (纸本)9781479936571

Electric power networks, namely distribution networks, have been suffering several changes during the last years due to changes in the power systems operation, towards the implementation of smart grids. Several approaches to the operation of the resources have been introduced, as the case of demand response, making use of the new capabilities of the smart grids. In the initial levels of the smart grids implementation reduced amounts of data are generated, namely consumption data. The methodology proposed in the present paper makes use of demand response consumers' performance evaluation methods to determine the expected consumption for a given consumer. Then, potential commercial losses are identified using monthly historic consumption data. Real consumption data is used in the case study to demonstrate the application of the proposed method.

关键词： Commercial losses Customer baseline load Performance evaluation methods Smart grid

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Server to Mobile Device Communication: A Case Study

Server to Mobile Device Communication: A Case Study

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4th International Symposium on Ambient Intelligence, ISAmI 2013

作者： Anacleto, Ricardo Figueiredo, Lino Almeida, Ana Novais, Paulo GECAD Knowledge Engineering and Decision Support Research Center School of Engineering of the Polytechnic Institute of Porto Porto Portugal CCTC - Computer Science and Technology Center University of Minho Braga Portugal

ISBN: (纸本)9783319005652

Develop a client-server application for amobile environment can bring many challenges because of the mobile devices limitations. So, in this paper is discussed what can be the more reliable way to exchange information between a server and an Android mobile application, since it is important for users to have an application that really works in a responsive way and preferably without any errors. In this discussion two data transfer protocols (Socket and HTTP) and three serialization data formats (XML, JSON and Protocol Buffers) were tested using some metrics to evaluate which is the most practical and fast to use. © Springer International Publishing Switzerland 2013.

关键词： Mobile computing

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