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Conference Record of the IEEE Industry Applications Society Annual Meeting (IAS)

作者： Parag Kshirsagar Rolando P Burgos Alessandro Lidozzi Jihoon Jang Fred Wang Dushan Boroyevich Seung-ki Sul The Bradley Department of Electrical and Computer Engineering Virginia Polytechnic Institute and State University Blacksburg Blacksburg VA USA ROMA TRE University Department of Mechanical and Industrial Engineering Via della Vasca Navale 79 00146 Rome Italy. lidozzi@ing.uniroma3.it HEV System Engineering Team Hyundai Motor Company Gyeonggi-Do Korea School of Electrical Engineering & Computer Science Seoul National University Seoul 151-744 Korea. sulsk@plaza.snu.ac.kr

This paper presents a complete design methodology for the sensorless vector control of permanent magnet synchronous machine (PMSM) motor drives in fan-type applications. The proposed strategy is built over a linear asymptotic state observer used to estimate the PMSM back-EMF, and a novel tracking controller based on a phase-locked loop (PLL) system, which by synchronizing the estimated and actual d-q frames estimates the rotor speed and position. The paper presents the complete derivation of all associated control-loops, namely state observer, tracking controller, d-q axes current regulator, speed controller, an anti-saturation control loop - which provides inherent operation in the flux-weakening region, and all corresponding anti-windup loops. Detailed design rules are provided for each of these loops, respectively verified through time-domain simulations, frequency-response analysis, and experimental results using a 300 Vdc 3.5 kW PMSM PWM motor-drive, validating both the design methodology and the excellent performance attained by the proposed control strategy

关键词： Phase estimation State estimation Design methodology Observers Tracking loops Phase locked loops Pulse width modulation Machine vector control Permanent magnet machines Motor drives

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A Study on Hybrid Energy Storage system for 42V Automotive Power-net

A Study on Hybrid Energy Storage System for 42V Automotive P...

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IEEE Conference on Vehicle Power and Propulsion (VPPC)

作者： Baek-Haeng Lee Dong-Hyun Shin Byeong-Woo Kim Hee-Jun Kim Byoung-Kuk Lee Chung-Yuen Won Jin Hur Electronics System R&D Center Korea Automotive Technology Institute Chonan ChungNam South Korea Department of Computer Science & Engineering Hanyang University Chonan ChungNam South Korea School of Information and Communication Engineering Sungkyunkwan University Chonan ChungNam South Korea Intelligent Mechatronics Research Center Korea Electronic Technology Institute Chonan ChungNam South Korea

There are lots of attempts in automotive field to supersede mechanical parts with electrical ones owing to increasing needs of drivers' safety, comfort and convenience as well as recent tightened environmental regulation. In addition, continuous improvements of semiconductor technology make it speed up to use electric components instead of conventional mechanical and hydraulic ones. In accordance with these tendencies, the demand of electric power and energy used in vehicle has been increasing steadily, and it will cause overburden of conventional 14 V power generation and distribution system. A research on higher voltage system started in early 1990s and 42 V power system has been introduced for a future automotive power-net. In this paper, technical trend in energy storage system which implies one of the key technologies to implement 42 V power-net is reviewed, and development results of the improved energy storage system consisted of ultracapacitor, battery and management controllers are presented

关键词： Energy storage Automotive engineering Electrical safety Continuous improvement Vehicles Power generation Voltage Power systems Supercapacitors Batteries

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Studies on the inverse estimation of the heat flux or heat transfer coefficient in composite materials

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Hangkong Taikong ji Minhang Xuekan/Journal of Aeronautics, Astronautics and Aviation 2006年第2期38 B卷 97-108页

作者： Cheng, Chung-Hsin Chen, Tsung-Chien Tuan, Pan-Chio Jang, Horng-Yuan Department of System Engineering Chung Cheng Institute of Technology National Defense University Taoyuan Taiwan Graduate School of Gerontic Technology and Service Nankai College Nantou Taiwan Department of Computer Science Information Engineering Nankai College Nantou Taiwan

The one dimensional inverse heat conduction problems of the composite materials with the unknown boundary conditions are discussed. Base on the boundary temperature measurement, the system's unknown boundary conditions such as the time varying heat flux or heat transfer coefficient can be estimated by input estimation (IE) approach inversely and the transient response of the temperature of the composite materials is calculated at the same time. The IE includes Kalman filter (KF) and weighted recursive least-square estimator (WRLSE). The unknown boundary conditions are regarded as the unknown inputs. Kalman filter (KF) is linear recursive least square error covariance estimation and its purpose is to generate the recursive innovation sequence. Because this sequence contains bias or systematic errors caused by implicit unknown time-variant inputs and random errors from the measurement data. WRLSE is used to identify the unknown inputs. The methodology for estimating the time varying unknown heat flux, heat transfer coefficient and temperature distribution of the composite materials is also presented in this work. The simulation results show that the proposed algorithm can accurately estimate the unknown heat flux, heat transfer coefficient and the temperature transient response of the composite materials.

关键词： Composite materials

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Tianwang search engine at TREC 2005: Terabyte track

Tianwang search engine at TREC 2005: Terabyte track

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14th Text REtrieval Conference, TREC 2005

作者： Yan, Hongfei Li, Jingjing Zhu, Jiaji Peng, Bo Network and Distribution System Laboratory School of Electronic Engineering and Computer Science Peking University Beijing 100871 China

Tianwang for the first time participated in all three tasks of the Terabyte Track of TREC 2005 to explore its performance. All three tasks, including the adhoc task (find all the relevant documents with high precision), the efficiency task (find top- 20 results for each of 50k-entry queries with efficiency and scalability) and the named page finding task (sometimes search a page by name), are based on a 426GB collection of 25.2 million pages taken from the .gov Web domain ("GOV2"). In the adhoc task with 50 topics, Tianwang returned at least one relevant document in top 10 for 42 topics. In the efficiency task, Tianwang returned at least one relevant document in top 20 for 44 of the 50 quires. In the named page task with 252 topics, Tianwang returned a desired page in top 10 for 99 topics;meanwhile, it failed to find a correct one for 120 topics.

关键词： Search engines

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Corrigendum to “SNMP information based routing mechanism for fast handoff in mobile IP” [computer Communications 28 (2005) 1887–1902]

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computer Communications 2006年第12期29卷 2446-2446页

作者： Sang-Hoon Ryu Soo-Hyun Park Doo-Kwon Baik Software System Laboratory Department of Computer Science & Engineering Korea University 5 Anam-dong Sungbuk-ku Seoul 136-701 Republic of Korea School of Business IT Kookmin University 861-1 Jeungreung-dong Songbuk-ku Seoul 136-702 Republic of Korea

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Abstracts from the 6th International Conference on the engineering of Sport, 10-14 July 2006, Olympic Hall, Munich, Germany Abstracts

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SPORTS engineering 2006年第2期9卷 107-127页

作者： [Anonymous] University of Massachusetts Lowell USA Science & Mathematics Department Kettering University Flint USA University of Illinois USA Western Michigan University USA Washington State University USA Casecade Engine USA Kanazawa University Japan Sumitomo Light Metal Japan Massachusetts Institute of Technology USA Nanyang Technological University Bioengineering Singapore University of Vienna Anthropology Austria Department of Mechanical Engineering University of Bath UK INSA Lyon France PETZL France Sports Materials Research Group University of Birmingham UK Laboratoire de Modélisation des Activités Sportives Bourget du Lac France Technical University Kaiserslautern Germany Department of Engineering Mechanics United States Air Force Academy Colorado Springs USA SRAM Corporation Colorado Springs USA Sports Engineering Research Group University of Sheffield UK Sports Engineering CSES Sheffield Hallam University USA Sports Engineering CSES Sheffield Hallam University UK Technische Universität München Germany Rush University Medical Center Chicago USA Faculty of Sports Science Department of Sport Equipment & Materials TU München Germany RMIT University Australia Institute of Health and Sports Sciences University of Tsukuba Ibaraki Japan Machine and Control Department Polytechnic University Kanagawa Japan SRI Sports Ltd. Hyogo Japan SRI Research and Development Ltd. Hyogo Japan Mizuno Corporation Osaka Japan Fukuoka Institute of Technology Fukuoka Japan University of Limerick Éire Graduate School of Engineering Hokkaido University Japan Faculty of Engineering Kitami Institute of Technology Japan University of Calgary Canada TaylorMade-adidas Golf Company USA Davis Mechanical Engineering University of California USA Davis Mechanical & Aeronautical Engineering University of California USA University of Wales Institute Cardiff Cardiff School of Sport UWIC Cardiff Cardiff School of Sport UWIC Wales Loughborough University UK Cranfield University UK Cr

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Effect of timing misalignment on performance of uplink synchronized DS-CDMA systems

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IEICE TRANSACTIONS ON COMMUNICATIONS 2005年第2期E88B卷 807-810页

作者： Kim, DK Hwang, SH Dept. of Information and Communication Engineering Inha University South Korea UMTS System Research Lab. LG Electronics South Korea School of Electronics and Computer Science University of Southampton United Kingdom

The uplink synchronous transmission scheme was proposed to improve the uplink performance of DS-CDMA systems. However, previous performance analyses have assumed perfect uplink synchronization among main paths, which is impractical due to timing misalignment. Accordingly, this Letter evaluates the impact of imperfect synchronization on the performance of an uplink synchronized DS-CDMA system by deriving an orthogonality factor as a measure of the imperfection in synchronization.

关键词： uplink synchronized CDMA timing misalignment

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An adaptive distributed query processing grid service

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1st VLDB Workshop on Data Management in Grids, DMG 2005

作者： Porto, Fabio Da Silva, Vinícius F. V. Dutra, Márcio L. Schulze, Bruno EPFL School of Computer and Communication Sciences Databas Laboratory Lausanne Switzerland National Laboratory for Scientific Computation Computer Science Dep RJ Brazil Military Institute of Engineering System Engineering Dep RJ Brazil

ISBN: (纸本)3540312129

Grid services provide an important abstract layer on top of heterogeneous components (hardware and software) that take part into a grid environment. We are developing a data grid service prototype that aims at providing transparent use of grid resources to data intensive scientific applications. Our prototype was designed having as target three main issues: (1) dynamic scheduling and allocation of query execution engine modules into grid nodes;(2)adaptability of query execution to variations on environment conditions and (3) support to special scientific operations. We propose a new node scheduling algorithm and show how it can be integrated into a simple distributed and parallel query optimization strategy. Our implementation demonstrates a speedup of 16.6 with 18 scheduled nodes and a steady throughput rate, obtained applying a dynamic adaptive strategy. © Springer-Verlag Berlin Heidelberg 2005.

关键词： Information services

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Feature subset selection for support vector machines using confident margin

Feature subset selection for support vector machines using c...

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International Joint Conference on Neural Networks, IJCNN 2005

作者： Kugler, Mauricio Aoki, Kazuma Kuroyanagi, Susumu Iwata, Akira Nugroho, Anto Satriyo Grad. School of Engineering Dept. of Computer Science and Engineering Nagoya Institute of Technology Gokiso-cho Showa-ku Nagoya 466-8555 Japan School of Life System Science and Technology Chukyo University 101 Tokodachi Kaizu-cho Toyota 470-0393 Japan

ISBN: (纸本)0780390482

The aim of this study is to develop a feature subset selection (FSS) method based on the margin of Support Vector Machines (SVM). The problem of directly using the SVM margin is that it does not always provide clear relationship between its value and the performance of SVM, and the best obtained subset is not guaranteed to be the best possible one. In this paper, a new solution is describe by the introduction of the Confident Margin (CM) in the subset criterion, which permits to get near the best recognition rate by monitoring the peak of CM curve without directly calculating the recognition rate, in order to save computational time. The performance of the proposed method was evaluated in artificial and real-world data experiments. © 2005 IEEE.

关键词： Learning systems

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A multi-buffer scheduling scheme for video streaming

A multi-buffer scheduling scheme for video streaming

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IEEE International Conference on Multimedia and Expo, ICME 2005

作者： Luo, Hongli Shyu, Mei-Ling Chen, Shu-Ching Department of Electrical and Computer Engineering University of Miami Coral Gables FL 33124 United States Distributed Multimedia Information System Laboratory School of Computer Science Florida International University Miami FL 33199 United States

ISBN: (纸本)0780393325

In this paper, we propose a multi-buffer scheduling scheme for streaming video systems. A transmission rate is obtained via a rate control algorithm, which optimally utilizes the network bandwidth and client buffer resources. The server side maintains multiple buffers for packets of different importance levels. It schedules the transmission of each packet based on the source buffer size and playback deadline to reduce the end-to-end distortion. The performance of proposed scheme is evaluated in terms of peak signal-to-noise ratio (PSNR) in the simulations, and the simulation results demonstrate the improvement of the average PSNR values compared with two other scheduling schemes. ©2005 IEEE.

关键词： Video signal processing

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