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International Journal of Internet Protocol Technology 2007年第1期2卷 1-2页

作者： Mulvenna, Maurice Galis, Alex Dobson, Simon Karmouch, Ahmed School of Computing and Mathematics Faculty of Engineering University of Ulster Newtownabbey BT37 0QB United Kingdom Networks and Services Research Group Department of Electronic and Electrical Engineering University College London Torrington Place London WC1E 7JE United Kingdom Systems Research Group School of Computer Science and Informatics UCD Dublin Belfield Dublin 4 Ireland University of Ottawa 161 Louis Pasteur Ottawa ON K1N 6N5 Canada

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Speckle noise reduction in SAR imaging using lattice filters based subband decomposition

Speckle noise reduction in SAR imaging using lattice filters...

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IEEE International Symposium on Geoscience and Remote Sensing (IGARSS)

作者： Gokhan Karasakal I. Erer Informatics Institute Advanced Technologies in Engineering.Computer Science and Eng Istanbul Technical University Istanbul Turkey Electronics and Communication Department I.T.U. Faculty of Electrical and Electronic Engineering Istanbul Turkey

A new speckle reduction algorithm based on lattice filters for SAR imaging is presented. In the new method, the subband decomposition of the speckled image is performed using lattice filters. The noisy image is decomposed into subband images using high-pass and low-pass filters having lattice structure, then a threshold value is estimated according to noise variance in each subband and soft-thresholding is applied on the subband images. The despeckled image is obtained from the thresholded subband images using the inverse lattice filter. The proposed speckle reduction method is applied to RADARSAT/SAR images. The performance of the proposed method has also been compared with median filtering, and discrete and stationary wavelet transform based speckle reduction methods. Results show that the proposed method may be used efficiently for speckle noise reduction in SAR images.

关键词： Speckle Noise reduction Radar polarimetry Lattices Discrete wavelet transforms Filter bank Low pass filters Channel bank filters Image reconstruction Filtering

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Runtime Support for Advanced Component Concepts

Runtime Support for Advanced Component Concepts

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International Conference on Software engineering Research, Management and Applications (SERA)

作者： Tomas Bures Petr Hnetynka Frantisek Plasil Jan Klesnil Ondrej Kmoch Tomas Kohan Pavel Kotrc Department of Software Engineering Faculty of Mathematics and Physics Charles University Prague Czech Republic Institute of Computer Science Academy of Sciences슠of the슠Czech Republic Prague Czech Republic School of Computer Science and Informatics University College Dublin Dublin Ireland

Component-based development has become a recognized technique for building large scale distributed applications. Although the maturity of this technique, there appears to be quite a significant gap between (a) component systems that are rich in advanced features (e.g., component nesting, software connectors, versioning, dynamic architectures), but which have typically only poor or even no runtime support, and (b) component systems with a solid runtime support, but which typically possess only a limited set of the advanced features. In our opinion, this is mainly due to the difficulties that arise when trying to give proper semantics to the features and reify them in development tools and an runtime platform. In this paper, we describe the implementation of the runtime environment for the SOFA 2.0 component model. In particular, we focus on the runtime support of the advanced features mentioned above. The described issues and the solution are not specific only to SOFA 2.0, but they are general and applicable to any other component system aiming at addressing such features.

关键词： Application software Software engineering computer science Buildings Large-scale systems Runtime environment Runtime library Containers Conference management Research and development management

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Decision support for flood event prediction and monitoring

Decision support for flood event prediction and monitoring

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IEEE International Symposium on Geoscience and Remote Sensing (IGARSS)

作者： Darka Mioc Gengsheng Liang Francois Anton Bradford George Nickerson Department of Geodesy and Geomatics Engineering University of New Brunswick Fredericton Canada Department of Informatics and Mathematical Modelling Technical University of Denmark Lyngby Denmark Faculty of Computer Science University of New Brunswick Fredericton Canada

In this paper the development of Web GIS based decision support system for flood events is presented. To improve flood prediction we developed the decision support system for flood prediction and monitoring that integrates hydrological modelling and CARIS GIS. We present the methodology for data integration, floodplain delineation, and online map interfaces. Our Web-based GIS model can dynamically display observed and predicted flood extents for decision makers and the general public. The users can access Web-based GIS that models current flood events and displays satellite imagery and digital elevation model integrated with flood plain area. The system can show how the flooding prediction based on the output from hydrological modeling for the next 48 hours along the lower Saint John River Valley.

关键词： Floods Geographic Information Systems Rivers Predictive models Decision support systems Displays computerized monitoring Weather forecasting Bridges Hydrology

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A Framework like a tool for specify motivating Collaborative Learning Participatory Simulations

A Framework like a tool for specify motivating Collaborative...

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International Conference on computer Supported Cooperative Work in Design

作者： Gustavo Zurita Nelson Baloian Felipe Baytelman Antonio Farias Pedro Antunes Information Systems Department-Business School Universidad de Chile Santiago Chile Computer Science Departments-Engineering School Universidad de Chile Santiago Chile Department of Informatics of the Faculty of Sciences University of Lisbon Lisboa Portugal

ISBN: (纸本)1424409624

Several research efforts suggest that collaborative participatory simulations improve teaching and learning, increasing motivation inside the classroom. Currently, it has been mainly applied with students of primary and secondary educational levels, leaving higher level students aside. This paper presents a framework for implementing Participatory Simulations, where social interactions and motivational effects are the main facilitators. An instance of this framework was implemented for business school undergraduate students. Its implementation is simple, lightweight, fully based on pen-based, and designed to work with handhelds over an ad-hoc wireless network.

关键词： Collaborative work Computational modeling Context modeling computer simulation Education Humans computer science Design engineering Collaborative tools International collaboration

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MULTI-ROBOT SYSTEMS: FROM FINITE AUTOMATA TO MULTI-AGENT SYSTEMS

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IFAC Proceedings Volumes 2007年第18期40卷 121-126页

作者： Doru Panescu ştefan Dumbrava “Gh. Asachi” Technical University of Iaşi Faculty of Automatic Control and Computer Engineering Department of Automatic Control and Applied Informatics Bd. D. Mangeron 53 A Iaşi Romania dorup@ac.tuiasi.ro sdumbrav@ac.tuiasi.ro

An attempt to connect finite automata theory with multi-agent systems is presented. The purpose is to obtain an accurate way to plan and control the robot activities within a multi-robot system. The proposed model is an adapted Moore machine, which is to be used with a contract net protocol agent coordination procedure. The considered architecture was tested in an educational flexible manufacturing system with two industrial robots.

关键词： Robotics multi-robot systems multi-agent systems robot programming finite automata flexible manufacturing systems

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On Industrial Techniques and Information Technology Control Classrooms

On Industrial Techniques and Information Technology Control ...

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Proceedings of the 46th IEEE Conference on Decision and Control, Pages 4593-5051

作者： Jana Flochova Leo Mrafko Dusan Mudroncik Filip Auxt Unstitute of Computer Systems andNetworks Faculty of Informatics and Information Technology Slovak University of Technology Bratislava Slovakia Electrocal Engineering and Information Technology Slovak University of Technology Bratislava Slovakia Material Science and Technology Slovak University of Technology Trnava Slovakia

ISBN: (纸本)9781424414970;1424414970

The aim of the paper is to describe some of our courses, activities and experiences at the Slovak University of Technology in teaching of industrial techniques and information technologies included in open control platforms of industrial controllers, PLC and DCS and in including of new theoretical methods of model-based control and failure diagnosis in the laboratory projects of our master students.

关键词： information technology Fault diagnosis teaching rooms Industrial CONSOLE Standing Orders Slovak

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Dynamic parameter identification for the CRS A460 robot

Dynamic parameter identification for the CRS A460 robot

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2007 IEEE/RSJ International Conference on Intelligent Robots and Systems

作者： Katayon Radkhah Dana Kulic Elizabeth Croft Department of Computer Science Technische Universität Darmstadt Darmstadt Germany Department of Mechanical Engineering University of British Columbia Vancouver BC Canada Department of Mechano Informatics University of Tokyo Bunkyo Tokyo Japan Faculty of Mechanical Engineering University of British Columbia Vancouver BC Canada

Dynamic Parameter Identification is a useful tool for developing and evaluating robot control strategies. However, a multi degree of freedom robot arm has many parameters, and the process of determining them is challenging. Much research has been done in this area and experimental methods have been applied on several robot arms. To our knowledge, there is currently no set of inertial parameters, either by modelling or by estimation, available for the CRS A460/A465 arm, a popular laboratory table top robot. In this paper we review and compare a number of methods for dynamic parameter identification and for generating trajectories suitable for estimating the identifiable dynamic parameters of a given robot. We then present a step by step process for dynamic parameter identification of a serial manipulator, and demonstrate this process by experimentally identifying the dynamic parameters of the CRS A460 robot.

关键词： Parameter estimation Manipulator dynamics Robot sensing systems Mechanical engineering Intelligent robots Laboratories Manufacturing Acceleration Kinematics Maximum likelihood estimation

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MaltParser: A language-independent system for data-driven dependency parsing

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Natural Language engineering 2007年第2期13卷 95-135页

作者： Nivre, Joakim Hall, Johan Nilsson, Jens Chanev, Atanas Eryiǧit, Gülşen Kübler, Sandra Marinov, Svetoslav Marsi, Erwin Växjö University School of Mathematics and Systems Engineering 35195 Växjö Sweden Uppsala University Department of Linguistics and Philology Box 635 75126 Uppsala Sweden University of Trento Dept. of Cognitive Sciences 38068 Rovereto Italy ITC-irst 38055 Povo-Trento Italy Istanbul Technical University Dept. of Computer Engineering 34469 Istanbul Turkey University of Tübingen Seminar für Sprachwissenschaft Wilhelmstr. 19 72074 Tübingen Germany University of Skövde School of Humanities and Informatics Box 408 54128 Skövde Sweden Göteborg University GSLT Faculty of Arts Box 200 40530 Göteborg Sweden Tilburg University Department of Communication and Cognition Box 90153 5000 LE Tilburg Netherlands

Parsing unrestricted text is useful for many language technology applications but requires parsing methods that are both robust and efficient. MaltParser is a language-independent system for data-driven dependency parsing that can be used to induce a parser for a new language from a treebank sample in a simple yet flexible manner. Experimental evaluation confirms that MaltParser can achieve robust, efficient and accurate parsing for a wide range of languages without language-specific enhancements and with rather limited amounts of training data. © 2007 Cambridge University Press.

关键词： Formal languages

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Multi-level analysis and information extraction considerations for validating 4D models of human function

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1st International Conference on Digital Human Modeling, ICDHM 2007

作者： Marias, Kostas Dionysiou, Dimitra D. Stamatakos, Georgios S. Zacharopoulou, Fotini Georgiadi, Eleni Margaritis, Thanasis Maris, Thomas G. Tollis, Ioannis G. Biomedical Informatics Laboratory ICS-FORTH Vassilika Vouton P.O. Box 1385 71110 Heraklion Crete Greece Laboratory of Microwaves and Fiber Optics School of Electrical and Computer Engineering National Technical University of Athens Iroon Polytechniou 9 GR-157 80 Zografos Greece Medical Physics Department University of Crete Faculty of Medicine Heraklion Greece Institute of Molecular Biology and Biotechnology IMBB -FORTH Vassilika Vouton P.O. Box 1385 71110 Heraklion Crete Greece

ISBN: (纸本)9783540733188

Recent research trends focus on how multiscale biomedical information can be modeled and transformed into knowledge, in order to lead to a less interfering but also more individualized diagnosis and therapy. In order to assess the clinical importance of models of human pathology (e.g. cancer), it is necessary to validate them with prior and post treatment clinical data which in turn requires the determination of the tumor size and shape with high resolution, accuracy and precision, as well as structural and physiological information. This paper discusses some of the most important image analysis challenges in order to define an optimal method for extracting more accurate and precise anatomical and functional information related to the underlying pathology, which can be used for initializing and validating models of pathophysiology as well as simulations/predictions of the response to therapeutical regimes. © Springer-Verlag Berlin Heidelberg 2007.

关键词： Information retrieval

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