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International Conference on Automatic Face and Gesture Recognition

作者： F. Tsalakanidou S. Malassiotis M.G. Strintzis Information Processing Laboratory Electrical and Computer Engineering Department Aristotle University of Thessaloniki Thessaloniki Greece Informatics and Telematics Institute Centre for Research and Technology Hellas Thessaloniki Greece

This work presents a complete face authentication system integrating 2D intensity and 3D range data, based on a low-cost, real-time structured light sensor. Novel algorithms are proposed that exploit depth data to achieve robust face detection, localization and authentication under conditions of background clutter, occlusion, face pose alteration and harsh illumination. The well known embedded hidden Markov model technique for face authentication is applied to depth maps. A method for the enrichment of face databases with synthetically generated views depicting various head poses and illumination conditions is proposed. The performance of the proposed system is tested on an extensive face database of 3,000 images. Experimental results demonstrate significant gains resulting from the combined use of depth and intensity.

关键词： Authentication Face detection Lighting Image databases Real time systems Sensor systems Robustness Hidden Markov models Head System testing

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Exploitation of 3D images for face authentication under pose and illumination variations

Exploitation of 3D images for face authentication under pose...

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International Symposium on 3D Data Processing Visualization and Transmission

作者： F. Tsalakanidou S. Malassiotis M.G. Strintzis Informatics and Telematics Institute Centre for Research and Technology Hellas Thessaloniki Greece Information Processing Laboratory Electrical and Computer Engineering Department Aristotle University of Thessaloniki Thessaloniki Greece

An appearance-based face authentication system integrating 2D color or intensity images and 3D data is presented. The proposed system is based on a low-cost 3D and color sensor, capable of synchronous real-time acquisition of 3D images and associated color images. Novel algorithms are proposed that exploit depth information and prior knowledge of face geometry and symmetry to achieve robust face detection, localization and authentication under conditions of background clutter, occlusion, face pose alteration and harsh illumination. A method for the enrichment of face databases with synthetically generated views depicting variations in pose and illumination is proposed to cope with head rotations and illumination variations, avoiding a cumbersome enrolment process. The performance of the proposed authentication scheme is tested thoroughly on a face database of 1500 images, recorded with the 3D acquisition system. Experimental results demonstrate significant gains resulting from the combined use of depth and color or intensity information, in comparison to the use of 2D images alone.

关键词： Authentication Lighting Face detection Image databases Image sensors Sensor systems Real time systems Color Information geometry Robustness

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A theoretical diagnosis approach applied to a power transmission system

A theoretical diagnosis approach applied to a power transmis...

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IEEE Conference on Decision and Control

作者： G.K. Fourlas K.J. Kyriakopoulos N.J. Krikelis Department of Informatics and Computer Technology Technological Educational Institute (TEI) of Lamia Lamia Greece Control Systems Laboratory Mechanical Engineering Department National and Technical University of Athens Athens Greece

ISBN: (纸本)0780386825

Fault detection and isolation is a challenging task in the control of large scale complex systems. In this work we proceed to the fault diagnosis of an electric power transmission system based on a fault diagnosis of hybrid systems method presented in our previous work. Power systems often exhibit complex behavior in response to large disturbances. Such behavior is characterized by interactions between continuous dynamics and discrete events. Components such as loads drive the continuous dynamics, while other components such as protection devices exhibit event-driven discrete dynamics. Therefore, power systems constitute an important case of hybrid systems for fault detection.

关键词： Power transmission Power system dynamics Hybrid power systems Power system protection Electrical fault detection Fault diagnosis Power system faults Control systems Large-scale systems Drives

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A selective border-casting zone routing protocol for ad-hoc networks

A selective border-casting zone routing protocol for ad-hoc ...

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International Workshop on Database and Expert Systems Applications

作者： L. Barolli Y. Honma A. Koyama A. Durresi J. Arai Department of Information and Communication Engineering Fukuoka Institute of Technology Japan Graduate School of Science and Engineering Yamagata University Japan Department of Informatics Yamagata University Japan Department of Computer Science Louisiana State University USA

One of well-known routing protocol for ad hoc networks is zone routing protocol (ZRP). The performance of ZRP is better than other protocols. However, many useless control packets are used resulting in the increase of network load and decrease of network performance. In this paper, we propose a selective border-casting zone routing protocol (SBZRP) to reduce the network load by limiting the number of control packets when the protocol searches for a new route. The performance evaluation via simulations shows that the SBZRP has better performance than ZRP.

关键词： Routing protocols Ad hoc networks Peer to peer computing Personal digital assistants Network topology Clustering algorithms computer networks Wireless LAN Mobile communication Mobile ad hoc networks

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An entropy-based multi-population genetic algorithm: I. The basic principles

An entropy-based multi-population genetic algorithm: I. The ...

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International Conference on Machine Learning and Cybernetics (ICMLC)

作者： Chun-Lian Li Xi-Cheng Wang Wen Li Jin-Cheng Zhao Guo Quan Institute of Computer Science and Technology Changchun University Changchun China Department of Computer Science and Engineering Dalian University of Technology Dalian China State Key Laboratory of Analysis for Industrial Equipment Dalian University of Technology Dalian China Institute of Bio-informatics and Molecular Design Dalian University Dalian China

ISBN: (纸本)0780384032

An improved genetic algorithm based on information entropy is presented in this paper. As a new iteration scheme in conjunction with multi-population genetic strategy, entropy-based searching technique with narrowing down space and the quasi-exact penalty function is developed to solve nonlinear programming (NLP) problems with equality and inequality constraints. A specific strategy of reserving the fittest member with evolutionary historic information is effectively used to approximate the solution of the nonlinear programming problems to the global optimization. Numerical examples show that the proposed method has good accuracy and efficiency.

关键词： Genetic algorithms Algorithm design and analysis Functional programming Genetic programming Design optimization computer science Design engineering Space technology Information entropy Constraint optimization

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A GA-based multi-purpose optimization algorithm for QoS routing

A GA-based multi-purpose optimization algorithm for QoS rout...

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International Conference on Advanced Information Networking and Applications (AINA)

作者： A. Koyama L. Barolli K. Matsumoto B.O. Apduhan Department of Informatics Yamagata University Yonezawa Yamagata Japan Department of Information and Communication Engineering Fukuoka Institute of Technology Fukuoka Japan Department of Computer Software University of Aizu Fukushima Japan Department of Intelligent Informatics Kyushu Sangyo University Fukuoka Japan

The routing algorithms for multimedia communication should use for routing more than one QoS parameter. This is because new services such as video on demand and remote meeting systems require better QoS. However, the problem of QoS routing is difficult and to find a feasible route with two independent path constraints is NP-complete. Also, QoS routing algorithms for broadband networks must be adaptive, flexible, and intelligent for efficient network management. In this paper, we propose a multipurpose optimization method for QoS routing based on genetic algorithm (GA). The simulation results show that proposed method has a good performance and is a promising method for QoS routing.

关键词： Routing Quality of service Broadband communication Delay informatics Multimedia communication Video on demand Intelligent networks Genetic algorithms Scalability

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On threshold properties

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Journal of Discrete Mathematical Sciences and Cryptography 2004年第2期7卷 249-254页

作者： Antonopoulou, Hera Department of Computer Engineering and Informatics Patras University Rio Patras 265 00 Greece Research and Academic Computer Technology Institute Patras 26110 P.O. Box 1122 Greece

In this paper we consider two random graph models and their relationship. More specifically, we consider the random graph model Gn,m, where a random graph is constructed by drawing uniformly and independently m edges ...

In this paper we consider two random graph models and their relationship. More specifically, we consider the random graph model G_n,m, where a random graph is constructed by drawing uniformly and independently m edges out of the (Formula presented.) possible edges without repetition, and the random graph model G_n,mm where a random graph is constructed by the same process, but the an edge is allowed to be selected more than once. We prove that the property of a random graph G of the latter model having multiple edges is a threshold property, with threshold function t(n) = n. Moreover, if m = cn for some positive real number c, then the probability that a random graph G has multiple edges approaches exp(–c ²). © 2004 Taylor & Francis Group, LLC.

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Preface 4th

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4th International Conference on Rough Sets and Current Trends in Computing, RSCTC 2004

作者： Tsumoto, Shusaku Slowiski, Roman Komorowski, Jan Grzymala-Busse, Jerzy W. Shimane University School of Medicine Department of Medical Informatics 89-1 Enya-cho Izumo Shimane Japan Poznan University of Technology Institute of Computing Science Piotrowo 3a Poznan Poland Uppsala University The Linnaeus Centre for Bioinformatics BMC Box 598 Husargatan 3 Uppsala Sweden University of Kansas Department of Electrical Engineering and Computer Science LawrenceKS United States

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A further study of nonlinear feedback system with chaotic oscillation

A further study of nonlinear feedback system with chaotic os...

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World Congress on Intelligent Control and Automation (WCICA)

作者： Fengling Han Xinghuo Yu Yong Feng Guanrong Chen School of Electrical and Computer Engineering Royal Melbourne Institute of Technology Melbourne VIC Australia Faculty of Informatics and Communication Central Queensland University Rockhampton QLD Australia Department of Electrical Engineering Harbin Institute of Technology China Department of Electronic Engineering City University of Hong Kong Hong Kong China

ISBN: (纸本)0780382730

This paper studies a simple nonlinear feedback system that consists of a relay-hysteresis in feedback with a linear continuous-time unstable second-order system. With suitable parameters and initial conditions, the system can create chaos. The analytic solutions on occurrence chaos and the criterion for maximum stability margin of chaos are presented.

关键词： Feedback Chaos Chaotic communication Hysteresis Relays Limit-cycles Australia Circuit stability Oscillators Piecewise linear techniques

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GridSpeed: a Web-based grid portal generation server

GridSpeed: a Web-based grid portal generation server

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International Conference on High Performance Computing in the Asia-Pacific Region

作者： T. Suzumura H. Nakada S. Matsuoka H. Casanova Tokyo Institute of Technology and Japan Society for the Promotion of Science Japan Industrial Science and Technology National Institute of Advanced Tokyo Institute of Technology Japan Tokyo Institute of Technology and National Institute of Informatics Japan San Diego Supercomputer Center Department of Computer Science and Engineering University of California San Diego USA

GridSpeed is a grid portal hosting server that automatically generates and publishes a customized Web interface to the grid for applications, with minimal effort required from the user. Users need only to specify information regarding their application using simple GridSpeed Web forms. With GridSpeed, users need not make any modifications to their applications nor write any glue code to publish the application on the Web, not requiring any knowledge of Perl, JSP (Java server pages) or Java servlets. Moreover, the portal generated by GridSpeed provides an application frontend as well as a set of fundamental portal services such as an information service, monitoring service, data management, single sign-on, and so forth. GridSpeed publishes a set of portals as grid services themselves generated by the system that is shamble, searchable, and accessible from others interested in using the application. This feature facilitates the reuse of application portals for specific application domains, as well as increases the number of available grid applications accessible on the Web. This work describes an overview and architecture of the GridSpeed system, and evaluates the system for two real-world scientific applications: BLAST and MCell.

关键词： Portals Mesh generation Application software Java Resource management computer industry Toy industry informatics Supercomputers computer science

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