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International Workshop on Variable Structure Systems, VSS

作者： Xinghuo Yu Qinglong Han Xiangjun Li Changhong Wang School of Electrical and Computer Engineering RMIT University Melbourne Australia Faculty of Business and Informatics Central Queensland University Rockhampton Australia Department of Control Science and Engineering Harbin Institute of Technology China

This paper studies the time-delay effect on the equivalent control based sliding mode control. Conditions to guarantee the boundedness of the control system steady states under the time delayed equivalent control based sliding mode control are obtained. Maximum upper bound of the delay time to guarantee boundedness is estimated. Simulations are conducted to verify the theoretical results.

关键词： Sliding mode control Control systems Delay effects Delay estimation Upper bound Communication system control Stability Steady-state Electrical equipment industry Industrial control

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A randomness based analysis on the data size needed for removing deceptive patterns

A randomness based analysis on the data size needed for remo...

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作者： Haraguchi, Kazuya Yagiura, Mutsunori Boros, Endre Ibaraki, Toshihide Department of Information Technology and Electronics Faculty of Science and Engineering Ishinomaki Senshu University Ishinomaki-shi 986-8580 Japan Department of Computer Science and Mathematical Informatics Graduate School of Information Science Nagoya University Nagoya-shi 464-8603 Japan Rutgers Center for Operations Research Rutgers University NJ 08854-8003 United States Department of Informatics School of Science and Technology Kwansei Gakuin University Sanda-shi 669-1337 Japan

We consider a data set in which each example is an n-dimensional Boolean vector labeled as true or false. A pattern is a co-occurrence of a particular value combination of a given subset of the variables. If a pattern appears frequently in the true examples and infrequently in the false examples, we consider it a good pattern. In this paper, we discuss the problem of determining the data size needed for removing "deceptive" good patterns;in a data set of a small size, many good patterns may appear superficially, simply by chance, independently of the underlying structure. Our hypothesis is that, in order to remove such deceptive good patterns, the data set should contain a greater number of examples than that at which a random data set contains few good patterns. We justify this hypothesis by computational studies. We also derive a theoretical upper bound on the needed data size in view of our hypothesis. Copyright © 2008 The Institute of Electronics, Information and Communication Engineers.

关键词： Data mining

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MAC Protocol for Cooperative MIMO Transmissions in Asynchronous Wireless Sensor Networks

MAC Protocol for Cooperative MIMO Transmissions in Asynchron...

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International Symposium on Communications and Information Technologies (ISCIT)

作者： Mohd Riduan Ahmad Eryk Dutkiewicz Xiaojing Huang Computer Engineering Department FKEKK Universiti Teknikal Malaysia Melaka Malacca Malaysia Wireless Technologies Lab TITRSECTEFaculty of Informatics University of Wollongong NSW Australia

Cooperative MIMO schemes can reduce both transmission energy and latency in distributed wireless sensor networks (WSNs). In this paper we develop a new cooperative low power listening (LPL) medium access control (MAC) protocol for two cooperative MIMO schemes: optimal beamforming (BF) and spatial multiplexing (SM). We develop analytical models for the total energy consumption and packet latency for both schemes and analyse the proposed MAC protocol in term of the total energy consumption and packet latency with imperfect synchronisation due to clock jitter. The impact of the clock jitter, the check interval and the number of cooperative nodes on the total energy consumption and latency are investigated. We observe that the cooperative LPL MAC with Optimal BF is the most promising configuration and it is optimal when then number of co-operating nodes M=2 and jitter difference is below 0.6 Tb.

关键词： Media Access Protocol Wireless application protocol MIMO Wireless sensor networks Delay Access protocols Energy consumption Jitter Clocks Array signal processing

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Investigation of fuzzy models for the valuation of residential premises using the KEEL tool

Investigation of fuzzy models for the valuation of residenti...

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8th International Conference on Hybrid Intelligent Systems, HIS 2008

作者： Lasota, Tadeusz Mazurkiewicz, Jacek Trawinski, Bogdan Trawinski, Krzysztof Agricultural University of Wroclaw Faculty of Environmental Engineering and Geodesy C.K. Norwida 25/27 50-375 Wroclaw Poland Wroclaw University of Technology Institute of Computer Engineering Control and Robotics Wybrzeze S. Wyspianskiego 27 50-370 Wroclaw Poland Wroclaw University of Technology Institute of Applied Informatics Wybrzeze S. Wyspianskiego 27 50-370 Wroclaw Poland Wroclaw University of Technology Faculty of Electronics Wybrzeze S. Wyspianskiego 27 50-370 Wroclaw Poland

ISBN: (纸本)9780769533261

A series of experiments aimed to generate and learn fuzzy models for the valuation of residential premises was conducted using the KEEL tool (Knowledge Extraction based on Evolutionary Learning). Four regression and four post-processing algorithms were applied to several data sets. They referred to sales/purchase transactions of residential premises, which were derived from the cadastral system and the registry of real estate transactions. The results proved the usefulness of the tool to carry out laborious and tedious investigation in a relatively short time. Further research is needed to determine to what extent data coming from such sources allow to build the real estate valuation models. © 2008 IEEE.

关键词： Housing

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A Robust Descriptor based on Weber's Law

A Robust Descriptor based on Weber's Law

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26th IEEE Conference on computer Vision and Pattern Recognition (CVPR 2008), vol.8

作者： Jie Chen Shiguang Shan Guoying Zhao Xilin Chen Wen Gao Matti Pietikainen School of Computer Science and Technology Harbin Institute of Technology Harbin China Machine Vision Group Department of Electrical and Information Engineering University of Oulu Finland Languages Informatics Systems and Software Engineering Department Faculty of Computer Science Chinese Academy and Sciences Beijing China

Inspired by Weber's Law, this paper proposes a simple, yet very powerful and robust local descriptor, Weber Local Descriptor (WLD). It is based on the fact that human perception of a pattern depends on not only the change of a stimulus (such as sound, lighting, et al.) but also the original intensity of the stimulus. Specifically, WLD consists of two components: its differential excitation and orientation. A differential excitation is a function of the ratio between two terms: One is the relative intensity differences of its neighbors against a current pixel;the other is the intensity of the current pixel. An orientation is the gradient orientation of the current pixel. For a given image, we use the differential excitation and the orientation components to construct a concatenated WLD histogram feature. Experimental results on Brodatz textures show that WLD impressively outperforms the other classical descriptors (e.g., Gabor). Especially, experimental results on face detection show a promising performance. Although we train only one classifier based on WLD features, the classifier obtains a comparable performance to state-of-the-art methods on MIT+CMU frontal face test set, AR face dataset and CMU profile test set.

关键词： Robustness Face detection Humans Content addressable storage Testing Psychology Laboratories Machine intelligence Information processing computers

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Supporting Crisis Management Processes by Wirelessly Interconnected Tablet-PCs

Supporting Crisis Management Processes by Wirelessly Interco...

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IEEE International Conference on e-Business engineering (ICEBE)

作者： Cláudio Sapateiro Pedro Antunes Gustavo Zurita Nelson Baloian Rodrigo Vogt Systems and Informatics Department Polytechnic Institute of Setύbal Portugal Informatics Department Faculty of Sciences University of Lisbon Portugal Management Control and IS Department Business School University of Chile Chile Computer Science Department Engineering School University of Chile Chile

When organizations face unforeseen emergency situations its members often resort to unstructured crisis management activities in order to overcome the problems. Researchers have noted that a common activity in these scenarios is the construction of a shared awareness of the situation in order to collaboratively identify the actions required to be carried on and the most suitable people to do them. In this paper we present a collaborative application based on Tablet-PCs to assist these unstructured activities aiming to improve their consistency and effectiveness. Inspired on the Reasons Swiss-Cheese model for accidents, the proposed approach relies on the development of a shared situation awareness, constructed from a set of collaboratively constructed situation matrixes which expose involved users contributions to the overall solution strategy. Three application scenarios are used as example.

关键词： Crisis management Collaboration Mobile communication informatics Collaborative work Conference management Disaster management engineering management Control systems computer science

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Investigation of Fuzzy Models for the Valuation of Residential Premises Using the KEEL Tool

Investigation of Fuzzy Models for the Valuation of Residenti...

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International Conference on Hybrid Intelligent Systems (HIS)

作者： Tadeusz Lasota Jacek Mazurkiewicz Bogdan Trawinski Krzysztof Trawinski Institute of Applied Informatics Wroclaw University of Technology Wroclaw Poland Faculty of Environmental Engineering and Geodesy Agricultural University of Wrocław Wroclaw Poland Wroclaw University of Technology Institute of Computer Engineering Control and Robotics Wrocław Poland Wrocław University of Technology Institute of Applied Informatics Wrocław Poland Faculty of Environmental Engineering and Geodesy Agricultural University Wroclaw Poland Faculty of Electronics Wrocław University of Technology Wrocław Poland

A series of experiments aimed to generate and learn fuzzy models for the valuation of residential premises was conducted using the KEEL tool (knowledge extraction based on evolutionary learning). Four regression and four post-processing algorithms were applied to several data sets. They referred to sales/purchase transactions of residential premises, which were derived from the cadastral system and the registry of real estate transactions. The results proved the usefulness of the tool to carry out laborious and tedious investigation in a relatively short time. Further research is needed to determine to what extent data coming from such sources allow to build the real estate valuation models.

关键词： Data models Tuning Buildings Algorithm design and analysis Data mining Floors Cost accounting

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FPGA Implementation of Low-Frequency GPR Signal Algorithm using Frequency Stepped Chirp Signals in the time Domain

FPGA Implementation of Low-Frequency GPR Signal Algorithm us...

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International Radar Symposium (IRS)

作者： V. Kyovtorov C Kabakchiev V. Behar G. Kuzmanov I. Garvanov L. Doukovska Institute of Information Technologies BAS Sofia Bulgaria Faculty of Mathematics & Informatics Sofia University Sofia Bulgaria Fnstitute for Parallel Processing BAS Sofia Bulgaria Computer Engineering Laboratory ETH Delft Netherlands

ISBN: (纸本)9788372077578

This paper concerns the FPGA implementation of a time-domain stepped frequency method, which is suitable for ground penetrating radar implementation. It describes the block of the algorithm from implementation point of view. The conclusion gives information about the real-time constraints, and the device utilization for the particular reconfigurable processor.

关键词： Ground penetrating radar Signal processing algorithms Frequency domain analysis Time frequency analysis Time domain analysis Algorithm design and analysis Hardware

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Intelligent Hypermedia for the Adaptive Web: Foreword to the SMAP '08 Special Session

Intelligent Hypermedia for the Adaptive Web: Foreword to the...

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International Workshop on Semantic Media Adaptation and Personalization (SMAP)

作者： Ioannis Anagnostopoulos Maria Bielikova Manolis Wallace John W.T. Lee Department of Information Communication Systems Engineering University of Aegean Samos Greece Institute of Informatics and Software Engineering Faculty of Informatics and Information Technologies Slovak University of Technology in Bratislava Ilkovicova Bratislava Slovakia Department of Computer Science and Technology University of Peloponnese Tripoli Greece Department of Computing Hong Kong Polytechnic University Hong Kong China

Researchers need to explore and study the plethora of challenges that emergent intelligent hypermedia technologies bring to the Adaptive Web. This special session aims to increase the awareness of researchers in this area, providing an in-depth investigation on several research and deployment issues, regarding the impact of intelligent methods on this new form of Web. In addition, this special session examines the performance characteristics of various approaches in Web-based systems, while it focuses on the development of intelligent methods among different hypermedia applications.

关键词： Intelligent structures Privacy informatics Protocols System testing Collaboration Service oriented architecture Systems engineering and theory Software engineering Information technology

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Observation of a Centrality-Dependent Dijet Asymmetry in Lead-Lead Collisions at sNN=2.76 TeV with the ATLAS Detector at the LHC

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Physical Review Letters 2010年第25期105卷 252303-252303页

作者： G. Aad B. Abbott J. Abdallah A. A. Abdelalim A. Abdesselam O. Abdinov B. Abi M. Abolins H. Abramowicz H. Abreu E. Acerbi B. S. Acharya M. Ackers D. L. Adams T. N. Addy J. Adelman M. Aderholz S. Adomeit P. Adragna T. Adye S. Aefsky J. A. Aguilar-Saavedra M. Aharrouche S. P. Ahlen F. Ahles A. Ahmad M. Ahsan G. Aielli T. Akdogan T. P. A. Åkesson G. Akimoto A. V. Akimov M. S. Alam M. A. Alam S. Albrand M. Aleksa I. N. Aleksandrov M. Aleppo F. Alessandria C. Alexa G. Alexander G. Alexandre T. Alexopoulos M. Alhroob M. Aliev G. Alimonti J. Alison M. Aliyev P. P. Allport S. E. Allwood-Spiers J. Almond A. Aloisio R. Alon A. Alonso J. Alonso M. G. Alviggi K. Amako P. Amaral C. Amelung V. V. Ammosov A. Amorim G. Amorós N. Amram C. Anastopoulos T. Andeen C. F. Anders K. J. Anderson A. Andreazza V. Andrei M-L. Andrieux X. S. Anduaga A. Angerami F. Anghinolfi N. Anjos A. Annovi A. Antonaki M. Antonelli S. Antonelli J. Antos F. Anulli S. Aoun L. Aperio Bella R. Apolle G. Arabidze I. Aracena Y. Arai A. T. H. Arce J. P. Archambault S. Arfaoui J-F. Arguin E. Arik M. Arik A. J. Armbruster K. E. Arms S. R. Armstrong O. Arnaez C. Arnault A. Artamonov G. Artoni D. Arutinov S. Asai J. Silva R. Asfandiyarov S. Ask B. Åsman L. Asquith K. Assamagan A. Astbury A. Astvatsatourov G. Atoian B. Aubert B. Auerbach E. Auge K. Augsten M. Aurousseau N. Austin R. Avramidou D. Axen C. Ay G. Azuelos Y. Azuma M. A. Baak G. Baccaglioni C. Bacci A. M. Bach H. Bachacou K. Bachas G. Bachy M. Backes E. Badescu P. Bagnaia S. Bahinipati Y. Bai D. C. Bailey T. Bain J. T. Baines O. K. Baker S Baker F. Baltasar Dos Santos Pedrosa E. Banas P. Banerjee Sw. Banerjee D. Banfi A. Bangert V. Bansal H. S. Bansil L. Barak S. P. Baranov A. Barashkou A. Barbaro Galtieri T. Barber E. L. Barberio D. Barberis M. Barbero D. Y. Bardin T. Barillari M. Barisonzi T. Barklow N. Barlow B. M. Barnett R. M. Barnett A. Baroncelli A. J. Barr F. Barreiro J. Barreiro Guimarães da Costa P. Barrillon R. Bartoldus A. E. Barton D. Bartsch R. L. Bates L. Batkova J. R. Batley A. Battaglia M. Albert-Ludwigs-Universität Fakultät für Mathematik und Physik Hermann-Herder Strasse 3 D-79104 Freiburg i.Br. Germany University of Oklahoma Homer L. Dodge Department of Physics and Astronomy 440 West Brooks Room 100 Norman Oklahoma 73019-0225 USA Institut de Física d’Altes Energies IFAE Edifici Cn Universitat Autònoma de Barcelona ES-08193 Bellaterra (Barcelona) Spain Université de Genève Section de Physique 24 rue Ernest Ansermet CH-1211 Geneve 4 Switzerland Oxford University Department of Physics Denys Wilkinson Building Keble Road Oxford OX1 3RH United Kingdom Institute of Physics Azerbaijan Academy of Sciences H. Javid Avenue 33 AZ 143 Baku Azerbaijan Oklahoma State University Department of Physics 145 Physical Sciences Building Stillwater Oklahoma 74078-3072 USA Michigan State University Department of Physics and Astronomy High Energy Physics Group East Lansing Michigan 48824-2320 USA Tel Aviv University Raymond and Beverly Sackler School of Physics and Astronomy Ramat Aviv IL - Tel Aviv 69978 Israel LAL Université Paris-Sud IN2P3/CNRS Orsay France INFN Sezione di Milano via Celoria 16 IT-20133 Milano Italy Università di Milano Dipartimento di Fisica via Celoria 16 IT-20133 Milano Italy INFN Gruppo Collegato di Udine Strada Costiera 11 IT-33100 Udine Italy ICTP Strada Costiera 11 IT-34014 Trieste Italy University of Bonn Physikalisches Institut Nussallee 12 D-53115 Bonn Germany Brookhaven National Laboratory Physics Department Building 510A Upton New York 11973 USA Hampton University Department of Physics Hampton Virginia 23668 USA Yale University Department of Physics P.O. Box 208121 New Haven Connecticut 06520-8121 USA Max-Planck-Institut für Physik (Werner-Heisenberg-Institut) Föhringer Ring 6 80805 München Germany Ludwig-Maximilians-Universität München Fakultät für Physik Am Coulombwall 1 DE-85748 Garching Germany Queen Mary University of London Department of Physics Mile End Road London E1 4NS United Kingdom Ruther

By using the ATLAS detector, observations have been made of a centrality-dependent dijet asymmetry in the collisions of lead ions at the Large Hadron Collider. In a sample of lead-lead events with a per-nucleon center of mass energy of 2.76 TeV, selected with a minimum bias trigger, jets are reconstructed in fine-grained, longitudinally segmented electromagnetic and hadronic calorimeters. The transverse energies of dijets in opposite hemispheres are observed to become systematically more unbalanced with increasing event centrality leading to a large number of events which contain highly asymmetric dijets. This is the first observation of an enhancement of events with such large dijet asymmetries, not observed in proton-proton collisions, which may point to an interpretation in terms of strong jet energy loss in a hot, dense medium.

关键词： Energy dissipation

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