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Optical transmitter bandwidth requirements for POF telecom links

WSEAS Transactions on Circuits and Systems 2005年第11期4卷 1608-1613页

作者： Louvros, S. Ioannou, K. Vassiliadis, B. Drossos, L. Kotsopoulos, S. Wireless Telecommunication Laboratory Department of Electrical and Computer Engineering University of Patras Rion 26500 Patras Greece Computer Science Hellenic Open University 13-15 Tsamadou st. GR-26222 Patras Greece Department of Applied Informatics in Management and Economy Technical Education Institute of Messologi Messologi Greece

Light emitting diodes (LED) are usually the alternative optoelectronic devices for optical communications with moderate bandwidth efficiency and bit rates, compared to semiconductor lasers. Laser applications dominate the long distance communication networks. However LED seems to be a very good solution, especially in very short distance communication networks, where Plastic Optical Fibers, (POF) are used as the optical transmission medium. This paper investigates a qualitative technique of calculating the bandwidth, based on first principles of semiconductor physics. This technique is more convenient for a first approach of the subject on optical communication networks and its simplicity provides a very useful analytical tool. Finally these results are compared with the existing experimental ones.

关键词： Optical links

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Providing service standardisation for virtual enterprises

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WSEAS Transactions on Circuits and Systems 2005年第11期4卷 1545-1552页

作者： Vassiliadis, B. Tsaknakis, J. Drossos, L. Sirmakessis, S. Ioannou, K. Internet and Multimedia Technologies Academic Research Computer Technology Institute Patras Greece Computer Science Hellenic Open University 13-15 Tsamadou st. GR-26222 Patras Greece Department of Applied Informatics in Management and Economy Technical Education Institute of Messologi Messologi Greece Wireless Telecommunication Laboratory Department of Electrical and Computer Engineering University of Patras Rion 26500 Patras Greece

Virtual Enterprises are a, relatively, new business model that is greatly depended on network technology. Providing services in such an environment is a challenge in itself;architectural, technological and organisational difficulties have not permitted yet the development of a framework for Virtual Enterprise enaction. In this paper we describe a Virtual Private Network architecture that uses special monitor and coordination processes in order to achieve efficient delivery of services and activities in Virtual Enterprise environments. We discuss the general architecture of the system, emphasising on the solutions used to monitor and co-ordinate various activities.

关键词： Virtual reality

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New e-learning tools for DC-DC converters

New e-learning tools for DC-DC converters

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European Conference on Power Electronics and Applications

作者： J. Hamar H. Funato S. Ogasawara I. Nagy Ogasawara & Funato Laboratory Department of Electrical and Electronic Engineering Utsunomiya University Utsunomiya Tochigi Japan Department of Automation and Applied Informatics Budapest University슠of슠Technology슠and슠Economics Budapest Hungary Computer and Automation Institute Hungarian Academy of Sciences (ATOMKI) Hungary

The paper gives an overview of the Yoto project, a novel e-learning initiative to build up an electrical engineering knowledge base. It also presents a new e-module of the project relating to the steady-state operation of DC-DC converters. The multimedia rich module contains numerous interactive tools promoting the high level education in the academy sector and the vocational trainings in the industry. The interactive tools also highly support the circuit design process by enabling fast calculation and access to relevant circuit quantities and waveforms (voltages and currents) in steady-state without long simulations

关键词： Electronic learning DC-DC power converters Humans Steady-state Laboratories informatics Automation Business computer science education Electrical engineering

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Multimedia course for power electronics, nonlinear dynamics and motion control

Multimedia course for power electronics, nonlinear dynamics ...

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IEEE Workshop on Power Electronics Education

作者： P. Bartal P. Bauer J. Hamar R.K. Jardan P. Korondi I. Nagy Z. Suto K. Zaban H. Funato S. Ogasawara Department of Automation and Applied Informatics Budapest University슠of슠Technology슠and슠Economics Budapest Hungary Delft University of Technnology Delft Netherlands Department of Electrical & Electronic Engineering Utsunomiya University Tochigi Japan Computer and Automation Research Institute Hungarian Academy of Sciences (ATOMKI) Budapest Hungary

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STABILIZATION OF CHAOS WITH FPIC: APPLICATION TO ZAD-STRATEGY BUCK CONVERTERS

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IFAC Proceedings Volumes 2005年第1期38卷 1183-1188页

作者： Fabiola Angulo Enric Fossas Carlos Ocampo Gerard Olivar Department of Electrical Electronic and Computer Science Universidad Nacional de Colombia. Cra. 27 No. 64-60 Manizales Colombia Institute of Industrial and Control Engineering Technical University of Catalonia Avda. Diagonal 647 pl 11 08027 Barcelona Spain Department of Systems Engineering Automatics and Industrial Informatics (ESAII) Technical University of Catalonia Rambla Sant Nebridi 10 planta 1 Ed TR-11 08222 Terrasa Spain Department of Applied Mathematics 4 Technical University of Catalonia Avda. Vctor Balaguer s/n E-08800 Vilanova i la Geltru Spain

In this paper a new design for controlling dynamical systems has been applied to buck converters driven with a PWM centered pulse and (Zero Average Dynamics) ZAD-strategy. Chaotic operation has been stabilized with the so-called Fixed Point Induced Control (FPIC) technique. Also, the same converter with delay whose 1-periodic orbit is always unstable, has been stabilized. Simulations are compared with the TDAS stabilization technique. Once a 1-periodic orbit has been stabilized, the dynamics shows the same characteristics and advantages of the ZAD design, such as robustness, fixed switching frequency (with zero average on the sliding surface) and a low output error.

关键词： Chaos Control Theory Converters Nonlinear Control Stabilization methods

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Towards a formal model of CyberRail

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IFIP 18th World computer Congress Topical Sessions

作者： Bjørner, Dines Chiang, Peter Jacobsen, Morten S.T. Hansen, Jens Kielsgaard Madsen, Michael P. Penicka, Martin Department of Computer Science School of Computing National University of Singapore 3 Science Drive 2 Singapore 117543 Singapore Section of Computer Science and Engineering Institute of Informatics and Computer Engineering Technical University of Denmark DK-2800 Kgs Lyngby Denmark Czech Technical University Department of Applied Mathematics Na Florenci 25 110 00 Praha 1 Czech Republic

ISBN: (纸本)1402081561

Based on a number of reports and publications, primarily by Takahiko Ogino [14], [15], [16] (in these proceedings), and [17], on the emerging concept of CyberRail, we attempt to show what a formal domain model of CyberRail might look like, and what benefits one might derive from establishing and having such a formal model. © 2004 Springer Science + Business Media, Inc.

关键词： Abstract data types

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The Healthgrid White Paper 3

The Healthgrid White Paper

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3rd Annual Conference of the Healthgrid Association, Healthgrid 2005

作者： Breton, Vincent Dean, Kevin Solomonides, Tony Aloisio, Giovanni Benkner, Siegfried Bilofsky, Howard Blanquer, Ignacio Brady, Michael Cannataro, Mario Chouvarda, Ioanna Claerhout, Brecht De Moor, Georges De Neve, Wilfried De Wagter, Carlos Fiore, Sandro Hassan, Kinda Heeren, Germaine Hernández, Vicente Herveg, Jean A.M. Hofmann, Martin Jones, Chris Koutkias, Vassilios Lloyd, Sharon Lonsdale, Guy Alonso, Victoria L. Maglaveras, Nicos Maigne, Lydia Malousi, Andigoni Martín-Sánchez, Fernando McClatchey, Richard Medico, Enzo Miguet, Serge Mirto, Maria Montagnat, Johan Nørager1, Sofie Nozaki, Kazunori Oliveira, Ilídio Castro Pennec, Xavier Poullet, Yves Merino, Juan Pedro Sánchez Strizh, Irina G. Taillet, Michel Tristram, Clive Tverdokhlebov, Nikolay Veltri, Pierangelo Ziegler, René CNRS-IN2P3 LPC Campus des Cézeaux AubiereCedex63177 France Internet Business Solutions Group Cisco Systems 9 New Square Bedfont Lakes Middlesex FelthamTW14 8HA United Kingdom University of the West of England Bristol CEMS Coldharbour Lane BristolBS6 6TH United Kingdom Center for Advanced Computational Technologies ISUFI Dept. of Innovation Engineering University of Lecce Via per Monteroni Lecce73100 Italy Institute of Scientific Computing University of Vienna Nordbergstrasse 15 ViennaA-1090 Austria University of Pennsylvania School of Engineering and Applied Science Computer and Information Science Center for Bioinformatics 1416 Blockley Hall 423 Guardian Drive PhiladelphiaPA19104-6021 United States Universidad Politecnica de Valencia Camino de Vera/n Valencia46022 Spain FRS FREng Dept. of Engineering Science Oxford University Parks Road OxfordOX1 3PJ United Kingdom Magna Graecia University of Catanzaro School of Bioinformatics and Biomedical Engineering Campus di Germaneto Viale Europa Germaneto Catanzaro88100 Italy Aristotle University The Medical School Lab of Medical Informatics Box 323 Thessaloniki54124 Greece Custodix NV Verlorenbroodstraat 120 Bus 14 MerelbekeB-9820 Belgium Research in Advanced Medical Informatics and Telematics UZ Gent 5K3 De Pintelaan 185 GentB9000 Belgium Department of Radiotherapy Ghent University Hospital Building P7 De Pintelaan 185 GentB-9000 Belgium Laboratoire LIRIS Université Lumière Lyon 2 Campus Porte des Alpes 5 avenue Pierre Mendès France Bron69676 France av. E.Mounierlaan 83 Brussels1200 Belgium Faculté de Droit de Namur - FUNDP Centre de Recherches Informatiques & Droit 5 rempart de la Vierge Namur5000 Belgium Schloss Birlinghoven Sankt Augustin53754 Germany CERN Geneva 231211 Switzerland Oxford University Computing Laboratory Wolfson Building OxfordOX1 3QD United Kingdom C&C Research Laboratories NEC Europe Ltd. Rathausallee 10 Sankt AugustinD-53757 Germany Medic

ISBN: (纸本)158603510X

Over the last four years, a community of researchers working on Grid and High Performance Computing technologies started discussing the barriers and opportunities that grid technologies must face and exploit for the development of health-related applications. This interest lead to the first Healthgrid conference, held in Lyon, France, on January 16th–17th, 2003, with the focus of creating increased awareness about the possibilities and advantages linked to the deployment of grid technologies in health, ultimately targeting the creation of a European/international grid infrastructure for health. The topics of this conference converged with the position of the eHealth division of the European Commission, whose mandate from the Lisbon Meeting was "To develop an intelligent environment that enables ubiquitous management of citizens’ health status, and to assist health professionals in coping with some major challenges, risk management and the integration into clinical practice of advances in health knowledge." In this context "Health" involves not only clinical procedures but covers the whole range of information from molecular level (genetic and proteomic information) over cells and tissues, to the individual and finally the population level (social healthcare). Grid technology offers the opportunity to create a common working backbone for all different members of this large "health family" and will hopefully lead to an increased awareness and interoperability among disciplines. The first HealthGrid conference led to the creation of the Healthgrid association, a non-profit research association legally incorporated in France but formed from the broad community of European researchers and institutions sharing expertise in health grids. After the second Healthgrid conference, held in Clermont-Ferrand on January 29th–30th, 2004, the need for a "white paper" on the current status and prospective of health grids was raised. Over fifty experts from different areas of grid tec

关键词： Health risks

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Approximating functions using rough sets

Approximating functions using rough sets

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Conference of the North American Fuzzy Information Processing Society - NAFIPS

作者： Z. Pawlak J. Peters A. Skowron Institute of Theoretical and Applied Informatics Polish Academy of Sciences Gliwice Poland Warsaw School of Information Technology Warsaw Poland Department of Electrical and Computer Engineering University of Manitoba Winnipeg MAN Canada Institute of Mathematics University of Warmia and Mazury Warsaw Poland

Approximating of functions that are specified using imperfect knowledge is one of the central issues of many areas such as machine learning, pattern recognition, data mining, or qualitative reasoning. However, we do not have yet satisfactory methods for approximation of functions and developed calculi on function approximations. In the paper we discuss a function approximation using the rough set approach. The main difference with the existing approaches in rough set theory is based on modification of the inclusion measure. This makes it possible to overcome some drawbacks of the previously used definitions. For applications it is important to develop rough measures on approximated objects, in particular on function approximations. The modified inclusion measure is also used to define an exemplary measure, i.e., the rough integral.

关键词： Rough sets Function approximation Information technology Data mining Set theory Particle measurements Extraterrestrial measurements Information systems informatics Mathematics

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Modeling Demand for Inventory Management of Slow-Moving Items in Case of Reporting Errors

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IFAC Proceedings Volumes 2004年第4期37卷 27-32页

作者： Alexandre Dolgui Anatoly Pashkevich Maxim Pashkevich Scientific Methods for Industrial Management Dept. (MSGI) Industrial Engineering and Computer Sciences Center (G2I) Ecole de Mines de Saint Etienne 158 Cours Fauriel 42023 Saint Etienne France Robotic Laboratory Department of Automatic Control Belarusian State University of Informatics and Radioelectronics 6 P.Brovka St. Minsk 220027 Belarus Department of Mathematical Modeling and Data Analysis Faculty of Applied Mathematics and Computer Science Belarusian State University Skarina Av. 4 Minsk 220050 Belarus

The paper is devoted to the problem of modeling demand for inventory management of slow-moving items in the case of reporting errors. It is proposed a generalization of the beta-binomial demand model that takes into account possible reporting errors in the learning sample. For the new model, there are developed identification and forecasting algorithms that provide consistent estimators of the model parameters and mean square optimal forecasts. The efficiency of the proposed approach is illustrated by an application example for slow-moving car parts.

关键词： inventory control error correction statistical inference parameter estimation prediction methods

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Direct learning control design for a class of linear time-varying switched systems

Direct learning control design for a class of linear time-va...

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Fourth International Conference on Control and Automation

作者： Xu, Jian-Xin Korondi, Peter Yan, Rui Guan, Zhi-Hong Department of Electrical and Computer Engineering National University of Singapore Singapore 117576 Department of Automation and Applied Informatics Budapest University of Technology and Economics Department of Control Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China

ISBN: (纸本)078037777X

In this paper, a direct learning control method for a class of switched systems is proposed. The objective of direct learning is to generate the desired control profile for a newly switched system without any feedback, even if the system may have uncertainties. This is achieved by exploring the inherent relationship between any two systems before and after a switch. The new method is applicable to a class of linear time varying, uncertain and switched systems, when the trajectory tracking control problem is concerned. A numerical simulation demonstrates the effectiveness of the proposed method. © 2003 IEEE.

关键词： Time varying control systems

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