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International Symposium on Wearable computers

作者： N. Sakata T. Kurata T. Kato M. Kourogi H. Kuzuoka Institute of Engineering Mechanics University of Tsukuba Japan Human Interface Technology Laboratory University of Washington USA Institute of Advanced Industrial Science and Technology AIST Intelligent Systems Institute AIST Japan Department of Computer and Communication Sciences Wakayama University Japan

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Observation of noise‐induced transitions in radar range tracking systems

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AIP Conference Proceedings 2005年第1期780卷 529-532页

作者： Eyad H. Abed Sheldon I. Wolk *Dept. of Electrical and Computer Engineering University of Maryland College Park MD 20742 **Institute for Systems Research University of Maryland College Park MD 20742 †Advanced Techniques Branch Tactical Electronic Warfare Division Code 5753 Naval Research Laboratory Washington D.C. 20375

Noise‐induced transitions are studied for nonlinear radar range tracker system models. The paper shows the existence of noise‐induced transitions in such models, indicating that the noise level can have a profound effect on the nature of tracker behavior. A scenario is considered in which a centroid tracking radar subtends two physical targets. The perceived track points are studied as a function target distance and noise. The work uses nonlinear models for radar range trackers developed in [1]. The noise‐induced transitions found in this work result in unanticipated changes in the bifurcation behavior of the tracking system the presence of noise. The relative impact of noise amplitude and target separation on the noise induced‐transitions is studied.

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Inverse kinematics learning for robotic arms with fewer degrees of freedom by modular neural network systems

Inverse kinematics learning for robotic arms with fewer degr...

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2005 IEEE/RSJ International Conference on Intelligent Robots and systems

作者： E. Oyama T. Maeda J.Q. Gan E.M. Rosales K.F. MacDorman S. Tachi A. Agah National Institute of Advanced Industrial Science and Technology Tsukuba Ibaraki Japan Human and Information Science Laboratory NTT Communication Science Laboratories Atsugi Kanagawa Japan Department of Computer Science University of Essex Colchester UK Department of Adaptive Machine Systems Osaka University Suita Osaka Japan School of Engineering University of Tokyo Bunkyo Tokyo Japan Department of Electrical Engineering and Computer Science University of Kansas Lawrence KS USA

Artificial neural networks have been traditionally employed to learn and compute the inverse kinematics of a robotic arm. However, the inverse kinematics model of a typical robotic arm with joint limits is a multi-valued and discontinuous function. Because it is difficult for a multilayer neural network to approximate this type of function, an accurate inverse kinematics model cannot be obtained by using a single neural network. In order to overcome the difficulties of inverse kinematics learning, we propose a novel modular neural network system that consists of a number of expert modules, where each expert approximates a continuous part of the inverse kinematics function. The proposed system selects one appropriate expert whose output minimizes the expected position/orientation error of the end-effector of the arm. The system can learn a precise inverse kinematics model of a robotic arm with equal or more degrees of freedom than that of its end-effector. However, there are robotic arms with fewer degrees of freedom, where the system cannot learn their precise inverse kinematics model. We have adopted a modified Gauss-Newton method for finding the least-squares solution to address this issue. Through the modifications presented in this paper, the improved modular neural network system can obtain a precise inverse kinematics model of a general robotic arm.

关键词： Kinematics Robots Arm Neural networks Artificial neural networks Multi-layer neural network computer networks Newton method Least squares methods Recursive estimation

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Formal specification and analysis of the Group Domain of Interpretation Protocol using NPATRL and the NRL protocol analyzer

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Journal of computer Security 2004年第6期12卷 893-931页

作者： Meadows, Catherine Syverson, Paul Cervesato, Iliano Center for High Assurance Computer Systems Naval Research Laboratory Washington DC 20375-5320 United States Advanced Engineering and Sciences Division ITT Industries Inc. 2560 Huntington Avenue Alexandria VA 22303-1410 United States

Although research has been going on in the formal analysis of cryptographic protocols for a number of years, they are only slowly being integrated into the protocol design process. In this paper we describe how we furthered the integration of analysis and design by working closely with the Multicast Security Working Group in the Internet engineering Task Force on the analysis of a proposed Internet Standard, the Group Domain Of Interpretation (GDOI) Protocol. We describe the challenges that had to be met before the analysis could be successfully completed, and some of the challenges that still remain. Perhaps not surprisingly, some of the most challenging work was in understanding the security requirements for group protocols in general. We give a detailed specification of the requirements for GDOI, describe our formal analysis of the protocol with respect to these requirements, and show how our analysis impacted the development of GDOI. © 2004 - IOS Press and the authors. All rights reserved.

关键词： Network protocols

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Interaction balance method for large-scale industrial processes with fuzzy constraints 10

Interaction balance method for large-scale industrial proces...

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10th IFAC/IFORS/IMACS/IFIP Symposium on Large Scale systems: Theory and Applications, LSS 2004

作者： Gu, Jia-Chen Wan, Bai-Wu Ruan, Xiao-E Automation Research and Design Institute of Metallurgical Industry Beijing China Systems Engineering Institute State Key Laboratory for Manufacturing Systems Engineering Xi 'an Jiaotong University Xi 'an China Dept.of Electrical Engineering and Computer Science Korea Advanced Institute of Science and Technology Daejeon Korea Republic of Faculty of Science Xi'an Jiaotong University Xi'an China

The interaction balance method (IBM) with fuzzy constraints is proposed for large-scale industrial processes under hierarchical steady-state optimization with the consideration of the model-reality difference and the constraints of subprocesses being flexible. In this approach, the models that are treated as equality constraints and the inequality constraints of the subprocesses are all fuzzified. Two cases of interaction balance method are studied: the open-loop IBM and the IBM with global feedback. Simulation results show that the solutions of the proposed method with global feedback are very close to the optimal solutions of the real process. © 2004 IFAC.

关键词： Large scale systems

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Support for data-intensive, variable-granularity grid applications via distributed file system virtualization - a case study of light scattering spectroscopy

Support for data-intensive, variable-granularity grid applic...

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International Workshop on Challenges of Large Applications in Distributed Environments

作者： J. Paladugula Ming Zhao R.J. Figueiredo Advanced Computing and Information Systems (ACIS) Laboratory Department of Electrical and Computer Engineering University of Florida USA

A key challenge faced by large-scale, distributed applications in grid environments is efficient, seamless data management. In particular, for applications that can benefit from access to data at variable granularities, data management can pose additional programming burdens to an application developer. This work presents a case for the use of virtualized distributed file systems as a basis for data management for data-intensive, variable-granularity applications. The approach leverages on-demand transfer mechanisms of existing, de-facto network file system clients and servers that support transfers of partial data sets in an application-transparent fashion, and complement them with user-level performance and functionality enhancements such as caching and encrypted communication channels. The paper uses a nascent application from the medical imaging field (light scattering spectroscopy -LSS) as a motivation for the approach, and as a basis for evaluating its performance. Results from performance experiments that consider the 16-processor parallel execution of LSS analysis and database generation programs show that, in the presence of data locality, a virtualized wide-area distributed file system setup and configured by grid middleware can achieve performance levels close (13% overhead or less) to that of a local disk, and superior (up to 680% speedup) to nonvirtualized distributed file systems.

关键词： File systems Application virtualization Light scattering Spectroscopy Large-scale systems Environmental management File servers Network servers Cryptography Communication channels

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New trend in control of steady-state large-scale systems 10

New trend in control of steady-state large-scale systems

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10th IFAC/IFORS/IMACS/IFIP Symposium on Large Scale systems: Theory and Applications, LSS 2004

作者： Wan, Bai-Wu Liu, Ding Ruan, Xiaoe Institute of Systems Engineering State Key Laboratory for Manufacturing Systems Engineering Xi'anJiaotong University China School of Automation Xi 'an University of Technology China Dept. of Electrical Engineering and Computer Science Korea Advanced Institute of Science and Technology 373-7 Guseong-dong Yuseong-gu Daejeon305-701 Korea Republic of Faculty of Science Xi 'anJiaotong University China

This paper reviews what the first Author and his Group have been investigating for the past decade in the on-line steady-state hierarchical intelligent control and optimization of large-scale industrial processes (LSIP), as well as large-scale systems (LSS). The techniques include the use of neural networks for identification and optimization, the use of expert systems to solve some kinds of hierarchical multi-objective optimization problems, the use of the fuzzy logic control and the use of the iterative learning control. In addition, several implementation examples and the product quality control for LSS are introduced. Finally the paper prospects the new stages of development. © 2004 IFAC.

关键词： Quality control

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Double-constrained optimization of optical component selection problem using genetic elitism and double string coding

Double-constrained optimization of optical component selecti...

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International Conference on Numerical Simulation of Optoelectronic Devices, (NUSOD)

作者： M.A. Dallaali M. Premaratne Advanced Computing and Simulation Laboratory (AXL) Department of Electrical and Computer Systems Engineering Monash University Clayton VIC Australia

The genetic elitism and double string coding were used to solve the optical component problem. For the first time, two constraints were applied where both were combined together using a merging function. The results s... 详细信息

关键词： Optical devices Attenuation Constraint optimization Cost function Genetic mutations Computational modeling computer simulation Laboratories Genetic engineering systems engineering and theory

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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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Enhanced broadband wireless networking through macroscopic diversity combining applications of MIMO technology

Enhanced broadband wireless networking through macroscopic d...

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Asilomar Conference on Signals, systems & computers

作者： Wun-Cheol Jeong Jong-Moon Chung Advanced Communication Systems Engineering Laboratory (ACSEL) Oklahoma Communication Laboratory for Networking and Bioengineering (OCLNB) School of Electrical and Computer Engineering Oklahoma State University Stillwater OK USA

ISBN: (纸本)0780386221

Multiple-input multiple-output (MIMO) systems can enable drastic increments in channel capacity by employing array antennas both at the transmitter and the receiver. However, the capacity of MIMO systems degrades severely when spatial correlation among multipath channels is present. In this paper, we show that the channel capacity is dominantly affected by shadowing, rather than multipath correlation. To overcome this adverse shadowing effect, we consider macroscopic selection diversity (MSD) scheme on top of MIMO technology, and provide an analysis of capacity outage probability for MSD-MIMO systems. The numerical results show that significant improvement is observed even with 2 base station (BS) diversity. It is also observed that the effect of spatial correlation due to multipath fading is almost negligible when multiple BSs cooperatively participate in the mobile communication scheme. Combined with the BS selection scheme, the proposed MSD-MIMO system overcomes adverse shadowing phenomena while obtaining spatial multiplexing gain in MIMO channels.

关键词： Diversity reception MIMO Shadow mapping Channel capacity Antenna arrays Receiving antennas Transmitting antennas Transmitters Degradation Multipath channels

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