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International Conference on Power Engineering, Energy and Electrical Drives, POWERENG

作者： Mehmet Yesilbudak Ersan Kabalci Seref Sagiroglu Ilhami Colak Department of Electronics and Automation Vocational College of Haci Bektas Veli Nevsehir University Nevsehir Turkey Department of Electrical and Electronics Engineering Faculty of Engineering and Architecture Nevsehir University Nevsehir Turkey Department of Computer Engineering Faculty of Engineering Gazi University Ankara Turkey Department of Electrical and Electronics Engineering Faculty of Technology Gazi University Ankara Turkey

This paper proposes a pitch angle forecasting model based on the k-nearest neighbor classification. Air temperature, atmosphere pressure, wind direction, wind speed, rotor speed and wind power parameters were represented as a 6-dimensional attribute tuple in the forecasting model. Euclidean, Manhattan and Minkowski distance metrics for measuring the proximity between training and test tuples, mean absolute, mean absolute percentage, and normalized root mean square error metrics for measuring the forecasting accuracy were embedded into the forecasting model. The k-nearest neighbor classifier with Manhattan distance metric for k=1 achieved MAE, MAPE and NRMSE as 0.001°, 0.245% and 0.324%, respectively as the best forecasting accuracy. However, as the worst forecasting accuracy, MAE, MAPE and NRMSE were achieved as 0.015°, 3.236% and 2.613%, respectively for Minkowski distance metric and k=10.

关键词： Forecasting Measurement Wind turbines Predictive models Wind speed Atmospheric modeling Control systems

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An intelligent electronic device prototype for electric vehicle environments

An intelligent electronic device prototype for electric vehi...

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2012 IEEE 2nd International Conference on Consumer electronics - Berlin, ICCE 2012

作者： Real-Calvo, R.J. Luna Rodriguez, J.J. Osuna Carmona, V. Bellido Outeirino, F.J. Santiago Chiquero, I. Computer Architecture Electronics and Electronics Technology Department University of Cordoba UCO Cordoba 14071 Spain

ISBN: (纸本)9781467315470

In the future scenario of transport and human mobility, the optimization of electric vehicles and their infrastructures (transport and energy supply) will be a key. This is the reason why it will have to provide adequate intelligent systems, both in electric vehicles and in infrastructures that provide service. Moreover, the development nowadays of Intelligent Electronic Devices (IED) and communications Machine To Machine (M2M) have enabled commercial solutions with relatively inexpensive cost. This paper discusses the design of M2M-based IED to develop a prototype with a flexible architecture, incorporating GPRS as wireless WAN solution and GPS technology to equip the system with geo-location functions, in order to cover future applications between electric vehicles and the different infrastructures to provide service. © 2012 IEEE.

关键词： Real time systems

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Design of an intelligent electronic device to control a private microgrid

Design of an intelligent electronic device to control a priv...

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2012 IEEE 2nd International Conference on Consumer electronics - Berlin, ICCE 2012

作者： Real-Calvo, R.J. Moreno-Muñoz, A. Pallares-Lopez, V. Gonzalez-Redondo, M.J. Moreno-Garcia, I.M. Computer Architecture Electronics and Electronics Technology Department University of Cordoba UCO Cordoba 14071 Spain

ISBN: (纸本)9781467315470

The context of energy diversification of the electricity market has triggered that many users have decided to invest in their own micro-grid to meet their needs. Moreover, at present the concept of Smart Grid is driving that all entities involved in the electricity market tend to form an open network where everyone can interact with each other, including those who use renewable energy. This document explains how must be an Intelligent Electronic Device (IED) that allows the user to control their micro-grid, describing what must be the functionality and architecture of this system. Finally, we present an IED prototype based on combining a processor and a FPGA to control a micro-grid. © 2012 IEEE.

关键词： Power markets

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Lightweight user access control in energy-constrained wireless network services

Lightweight user access control in energy-constrained wirele...

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6th International Conference on Ubiquitous Computing and Ambient Intelligence, UCAmI 2012

作者： Naranjo, J.A.M. Orduña, Pablo Gómez-Goiri, Aitor López-De-Ipiña, Diego Casado, L.G. Department of Computer Architecture and Electronics University of Almería Spain Deusto Institute of Technology - DeustoTech University of Deusto Bilbao Spain

ISBN: (纸本)9783642353765

This work introduces a novel access control solution for infrastructures composed of highly constrained devices which provide users with services. Low energy consumption is a key point in this kind of scenarios given that devices usually run on batteries and are unattended for long periods of time. Our proposal achieves privacy, authentication, semantic security, low energy and computational demand and device compromise impact limitation on a simple manner. The access control provided is based on user identity and time intervals. We discuss these properties and compare our proposal to previous related work. © 2012 Springer-Verlag.

关键词： Internet of things

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A ubiquitous system using semantic knowledge in dynamic service integration

A ubiquitous system using semantic knowledge in dynamic serv...

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2nd International Conference on Pervasive Embedded Computing and Communication Systems, PECCS 2012

作者： Dziubich, Tomasz Kaczmarek, Pawel Nasiadka, Slawomir Department of Computer Systems Architecture Faculty of Electronics Gdánsk University of Technology Narutowicza 11/12 Str. 80-233 Gdańsk Poland

ISBN: (纸本)9789898565006

The paper presents a ubiquitous system that uses semantic information to manage dynamic changes in system elements. We design the system using the Context-Controller-Action architecture that covers the main parts of ubiquitous environments, including: environment devices (such as sensors and actuators), contexts and actions, all of which may be dynamically configured during system operation. A graphical user interface for the system is supplied, which enables non-expert users to perform changes in system configuration. Internally, semantic information is used throughout the system to define a common language between devices, contexts and services. A Web services interface is used in services that handle environment devices to support their integration with the system regardless of internally used communication protocols. The architecture was implemented as a framework for developing and running applications in ubiquitous environments. We integrated a number of devices in the framework, including, RFID sensors, digital displays, cameras, electronic door locks and others. We also defined exemplary contexts and actions in the environment.

关键词： Graphical user interfaces

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An Intelligent Electronic Device prototype for electric vehicle environments

An Intelligent Electronic Device prototype for electric vehi...

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IEEE International Conference on Consumer electronics - Berlin (ICCE-Berlin)

作者： R. J. Real-Calvo J. J. Luna Rodriguez V. Osuna Carmona F.J. Bellido Outeiriño I. Santiago Chiquero Computer Architecture Electronics and Electronics Technology Department University of Cordoba Cordoba Spain

关键词： Prototypes Servers Electric vehicles Global Positioning System Monitoring Batteries

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Design of an Intelligent Electronic Device to control a private microgrid

Design of an Intelligent Electronic Device to control a priv...

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IEEE International Conference on Consumer electronics - Berlin (ICCE-Berlin)

作者： R. J. Real-Calvo A. Moreno-Muñoz V. Pallares-Lopez M.J. Gonzalez-Redondo I.M. Moreno-Garcia Computer Architecture Electronics and Electronics Technology Department University of Cordoba Cordoba Spain

关键词： Field programmable gate arrays Prototypes Consumer electronics computer architecture Real-time systems Digital signal processing Smart grids

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Convolution computation in FPGA based on carry-save adders and circular buffers

Convolution computation in FPGA based on carry-save adders a...

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3rd International ICST Conference on IT Revolutions, 2011

作者： Moreno, Carlos D. Martínez, Pilar Bellido, Francisco J. Hormigo, Javier Ortiz, Manuel A. Quiles, Francisco J. Computer Architecture Electronics and Electronic Technology Department University of Córdoba Spain Applied Physics Department EPS University of Córdoba Spain Computer Architecture Department University of Málaga Spain Campus Universitario de Rabanales 14071 Córdoba Spain Campus Universitario de Teatinos 29080 Málaga Spain

ISBN: (纸本)9783642323034

In this article, we present some architectures to carry out the convolution computation based on carry-save adders and circular buffers implemented on FPGAs. Carry-save adders are not frequent in the implementation in FPGA devices, since these have a fast carry propagation path. We make use of the specific structure of the FPGA to design an optimized accumulator which is able to deal with carry-save additions as well as carry-propagate additions using the same hardware. On the other hand, this structure of circular buffers allows the convolution computation of two signals with two algorithms of calculation: the input side algorithm and the output side algorithm, in a more efficient way. © 2012 ICST Institute for computer Science, Social Informatics and Telecommunications Engineering.

关键词： Field programmable gate arrays (FPGA)

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Effective implementation of basic operations for information retrieval

Journal of Digital Information Management

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Journal of Digital Information Management 2012年第6期10卷 389-398页

作者： Szymanski, Julian Department of Computer Systems Architecture Faculty of Electronics Telecommunications and Informatics Gdansk University of Technology Poland

In the article we describe the approach to parallel implementation of elementary operations for textual data categorization. In the experiments we evaluate parallel computations of similarity matrices and k-means algorithm. The test datasets have been prepared as graphs created from Wikipedia articles related with links. W also present the approach to computing pairs of eigenvectors and eigenvalues for visualizations of the datasets. The implemented basic operations: computing similarity matrix, data clustering and spectral analysis have been used in our system for visualization of the Wikipedia categories on SOM as well as in a system for categorization search results in Wikipedia.

关键词： Information retrieval

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Dual-core motion estimation processor

Dual-core motion estimation processor

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International Conference on Field Programmable Logic and Applications

作者： Joaquín Olivares Jose M. Palomares Department of Computer Architecture Electronics and Electronic Technology University of Córdoba Cordoba Spain

This paper presents a motion estimation processor based on a dual-core architecture. Both cores are based on bit-serial adder trees. Memory structures are also described. This architecture is bit-precision reconfigurable. Performance results for several smartphones and tablets are presented. Furthermore, hardware results and comparison with other works are included. Real-time processing is achieved for all devices studied.

关键词： Table lookup Logic gates Abstracts

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