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14th World Congress on Intelligent Transport systems, ITS 2007

作者： Baba, Kyoko Hirai, Yuzo Master's Program in Graduate School of Systems and Information Engineering University of Tsukuba 1-1-1 Ten-nodai Tsukuba Ibaraki 305-8573 Japan Department of Computer Science Graduate School of Systems and Information Engineering University of Tsukuba 1-1-1 Ten-nodai Tsukuba Ibaraki 305-8573 Japan

ISBN: (纸本)9781617387777

In order to assist driver's vision, a real-time recognition system for traffic signs is proposed. After detecting sign candidates, biologically inspired opponent-color filters are used to extract symbol parts of signs. After normalizing the size of symbol, structural features are calculated to identify the sign. 5572 segmented images are used to design the algorithm. In a real-time system, the same sign in a sequence of frames is tracked, and a majority vote is used to integrate the recognition results. For test data, 93.8% recall rate and 99.3% precision rate could be attained. In-vehicle experiment also showed high recall and precision rates.

关键词： Traffic signs

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Construction of a metadata space for a specific field of knowledge from an index of a document

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systems and Computers in Japan 2007年第5期38卷 30-42页

作者： Nakanishi, Takafumi Kishimoto, Sadaya Sakurai, Tetsuya Kitagawa, Takashi Graduate School of Systems and Information Engineering University of Tsukuba Tsukuba 305-8577 Japan Master's Program in Science and Engineering University of Tsukuba Tsukuba 305-8577 Japan

In this paper, we propose a method for generating a metadata space of associations between words from an index of a book dealing with a specific field of interest. In order to implement a search mechanism using a mathematical model of meaning that deals with a specific field of interest, it is necessary to generate a search space called a metadata space dealing with the field of interest. In the past, the metadata space has been generated by using a terminology dictionary and a highly specialized knowledge base. Also, it is difficult to generate the metadata space if there is no terminology dictionary that deals with the field of interest. The proposed method does not require a terminology dictionary, and it allows the generation of the metadata space without a highly specialized knowledge base. Further, by applying this metadata space generation method to a mathematical model of meaning, a search mechanism based on the associations between words in the search target data, such as documents and media data, in the specific field of interest can be implemented. In this paper, taking examples from the IT field, the effectiveness of the method is verified by comparing the use of a metadata space generated from a terminology dictionary and the use of a metadata space generated from an index to search graphic media data. © 2007 Wiley Periodicals, Inc.

关键词： Metadata

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Novelty-based incremental document clustering for on-line documents 22

Novelty-based incremental document clustering for on-line do...

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22nd International Conference on Data engineering Workshops, ICDEW 2006

作者： Khy, Sophoin Ishikawa, Yoshiharu Kitagawa, Hiroyuki Master's Program in Science and Engineering Tsukuba Ibaraki Japan Graduate School of Systems and Information Engineering Tsukuba Ibaraki Japan Center for Computational Sciences University of Tsukuba Tsukuba Ibaraki Japan

ISBN: (纸本)0769525717

Document clustering has been used as a core technique in managing vast amount of data and providing needed information. In on-line environments, generally new information gains more interests than old one. Traditional clustering focuses on grouping similar documents into clusters by treating each document with equal weight. We proposed a novelty-based incremental clustering method for on-line documents that has biases on recent documents. In the clustering method, the notion of 'novelty' is incorporated into a similarity function and a clustering method, a variant of the K-means method, is proposed. We examine the efficiency and behaviors of the method by experiments. © 2006 IEEE.

关键词： Cluster analysis

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An innovative model for the administration of undergraduate capstone projects

An innovative model for the administration of undergraduate ...

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113th Annual ASEE Conference and Exposition, 2006

作者： Donohue, Susan Louis, Garrick Scherer, William Smith, Michael C. White Jr., K. Preston Beling, Peter University of Virginia United States Department of Systems and Information Engineering IEEE ASEE Accelerated Master's Program Department of Systems and Information Engineering IIE INFORMS University of Virginia Institute for Microelectronic United States Semiconductor Manufacturing Information Technology Center

We discuss the program-level model used in the administration of undergraduate Capstone (senior design) projects in the Department of systems and Information engineering at University of Virginia's School of engineering and Applied Science in this paper. A unique model at the time of its inception in 1988, its adoption by other institutions and its longevity are measures of its effectiveness and robustness. We provide an overview of the tasks performed by the various personnel involved in the administration of the undergraduate Capstone projects in chronological order, starting with activities performed during the summer recess, after a brief introduction to our Department's Capstone program. The goal of providing this "cookbook" review of the model is to provide sufficient information to allow other departments to adopt similar practices. © American Society for engineering Education, 2006.

关键词： Curricula

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Predictive Visual Feedback Control with Eye-in-Hand System via Stabilizing Receding Horizon Approach

Predictive Visual Feedback Control with Eye-in-Hand System v...

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IEEE Conference on Decision and Control

作者： Toshiyuki Murao Teruki Yamada Masayuki Fujita Master Program of Information Systems Architecture Advanced Institute of Industrial Technology Tokyo Japan Department of Mechanical and Control Engineering Tokyo Institute of Technology Tokyo Japan

ISBN: (纸本)1424401704;9781424401703

This paper investigates vision based robot control based on a receding horizon control strategy, as a first step for a predictive visual feedback control. Firstly, the brief summary of the 3D dynamic visual feedback system with eye-in-hand configuration is given. Next, a stabilizing receding horizon control for the 3D dynamic visual feedback system, a highly nonlinear and relatively fast system, is proposed. The stability of the receding horizon control scheme is guaranteed by using the terminal cost derived from an energy function of the visual feedback system. Furthermore, simulation results are assessed with respect to the stability and the performance

关键词： Feedback control Control systems Stability Robot sensing systems Nonlinear dynamical systems Nonlinear control systems Cost function Robot vision systems Manipulator dynamics Visual servoing

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Design and prototype development of advanced oxidation black and gray water treatment systems

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NAVAL ENGINEERS JOURNAL 2006年第3期118卷 51-64页

作者： Markle, Stephen P. CDR. STEPHEN P. MARKLE USN (REt.)P.E.a retired US Navy Engineering Duty Officer and is the Engineering Director for Navalis Environmental Systems. His active duty assignments included the staff of the Chief of Naval Operations Director of Surface Warfare as Section Head for Surface Combatant Maintenance and Modernization Program Executive Office Expeditionary Warfare as Assistant Project Manager for the (TAKE 1)Class Program and as Deputy Director Environmental Programs Division at Naval Sea Systems Command. He is a 1993 graduate of the Naval Construction and Engineering Program at the Massachusetts Institute of Technology where he received a Naval Engineers Degree and Master of Science in Mechanical Engineering. Since 1995 he has authored thirteen published technical papers dealing with environmental issues. CDR Markle is the recipient of Fiscal Year 2001 Individual Environmental Quality Awards and Environmental Excellence in Weapon System Acquisition Team Awards from Naval Sea Systems Command Chief of Naval Operations Secretary of the Navy and Secretary of Defense and the 2001 ASNE “Jimmie Hamilton” award. He is a Professional Engineer registered in the State of New York and Commonwealth of Virginia. He serves as the Chair of the Joint ASNE/SNAME Committee on Environmental Engineering and also as Chair of ASTM Ships and Marine Technology Marine Environmental Protection Subcommittee (F25.06).

Regulations governing the discharge of sewage from ships have been in force since the early 1970's. In response, the marine industry has developed ever more complex systems and processes for managing these wastes. The first compliance method involved holding wastes until they could be legally discharged;as technology advanced, treatment systems were developed and installed to enable discharge within regulated waters. As the size and number of ships as increased with maturation of the ocean tourism business, more restrictive regulations have been enacted to minimize the impact on sensitive waters. The trend is toward increasing regulation of both sewage and graywater. The most recent action occurred on 12 October 2005 when the Governor of California signed into law Senate Bill 771 regulating most ship liquid discharges within state waters. This paper describes the development of an innovative advanced wastewater treatment technology, based on advanced oxidation, bearing in mind the lessons learned from systems developed by industry over the past thirty years.

关键词： Wastewater treatment

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Topic activation analysis for document streams based on document arrival rate and relevance 05

Topic activation analysis for document streams based on docu...

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20th Annual ACM Symposium on Applied Computing

作者： Cui, Chunhua Kitagawa, Hiroyuki Master's Program in Science and Engineering University of Tsukuba Graduate School of Systems and Information Engineering Center for Computational Sciences University of Tsukuba

ISBN: (纸本)9781581139648

With the advance of network technology in recent years, the dissemination and exchange of massive documents has become commonplace. Accordingly, the importance of content analysis techniques is increasing. Topic analysis in large-scale document streams such as E-mails and news articles is an important research issue. This paper addresses techniques for "topic activation analysis" for document streams. For example, when news articles with a strong relationship to a given topic arrive frequently in a news stream, we can regard the activation level of the topic as high. In [I], Kleinberg proposed a method for analyzing document streams. Although the main objective of his method was to detect bursts of topics, it can also be used for topic activation analysis. His method, however, has a serious limitation in that it only looks at the arrival rate of documents and ignores the degree of relevance for each document. Another limitation is that his method is "batch-oriented." This paper first proposes a novel topic activation analysis scheme that incorporates both document arrival rate and relevance to address the first problem. It then presents an incremental scheme more appropriate for a document streaming environment. The proposed schemes are validated by experiments using real CNN news articles. Copyright 2005 ACM.

关键词： Computer networks

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Measurment of local strain field of a laminated rubber bearing under tensile axial loading 1

Measurment of local strain field of a laminated rubber beari...

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1st International Conference on Advances in Experimental Stuctural engineering, AESE 2005

作者： Shoji, Gaku Saito, Kei Kameda, Toshihiro Fueki, Takaaki Graduate School of Systems and Information Engineering University of Tsukuba Ibaraki305-8573 Japan Japan Research Institute Ltd. Tokyo102-0074 Japan Graduate School of Systems and Information Engineering University of Tsukuba Ibaraki305-8573 Japan Master’s Program in Science and Engineering Graduate School University of Tsukuba Ibaraki305-8573 Japan

ISBN: (纸本)4901887181

Effect of tensile axial loading on seismic performance (plastic shear deformation) of a laminated rubber bearing (LRB) was clarified. Cyclic loading tests were carried out to evaluate the relation between lateral force and lateral displacement of the LRB under seismic conditions (i.e., axial loading) and under worn conditions (i.e., 300 cycles). A strain measurement scheme based on image analysis was used to obtain the local strain fields of the LRB. Localized strain fields under tensile axial loading occurred more markedly at the corners of the free surface of the LRB than those under compressive axial loading. The seismic performance of the LRB under tensile or compressive axial loading was degraded severely after shear deformation incurred during 300 cycles. After 300 cycles, for the LRB under compressive axial loading, large localized shear strain fields occurred at the rubber layers underneath and on the inner steel plates, whereas, for the LRB under tensile axial loading, such large strain fields occurred at the rubber layers around the upper and lower steel plates. © 2005 EUCENTRE. All rights reserved.

关键词： Rubber

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Operating speed profiles and the ship design cycle

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NAVAL ENGINEERS JOURNAL 2005年第3期117卷 79-85页

作者： Surko, S Osborne, M CDR. Stephen W. Surko USN (ret.) is serving as a principal member of the technical staff of Noesis Inc. He graduated with distinction from the United States Naval Academy in 1982 with a bachelor of science in ocean engineering. Serving as a division officer aboard USS Elliot (DD 967) he enjoyed two WESTPAC deployments and qualified as a surface warfare officer. He completed postgraduate studies at the Massachusetts Institute of Technology in 1988 receiving master of science degrees in naval architecture and marine engineering and mechanical engineering. He earned his professional engineer's license in 1989. Subsequent tours of duty have included: personnel exchange program with Canada's Directorate General Maritime Engineering and Maintenance Philadelphia Naval Shipyard Naval Surface Warfare Center Carderock Division Ship Systems Engineering Station Naval Sea Systems Command Chief of Naval Operations Land Attack Warfare Division and Naval Surface Warfare Center Carderock Division. Steve Surko is an active member of the U.S. Naval Institute and ASNE

One key, but little documented and empirically supported, input in the ship design cycle is the expected operating speed profile. This real-world constraint affects many decisions regarding bull form and power systems, from fuel tanks to main propulsion and ship's service machinery selection and operation. These decisions, in turn, ripple through the design of a ship in ways that are often bard to discern, but clearly impact acquisition and life cycle costs. Recent studies of DDG 51 operating speed profiles demonstrate that the Navy regularly operates with speed profiles considerably different than used to design the ship. In general, warships operate in standard engine order telegraph increments (e.g., Ahead 2/3) and at lower speeds than designed for.

关键词： Ships

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Incomplete Cholesky Preconditioners with Band-Diagonalization for Sparse Symmetric systems

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Applied Numerical Analysis & Computational Mathematics 2004年第2期1卷

作者： Taku Itoh Daichi Fujimoto Takashi Kitagawa Susumu Nakata Graduate School of Systems and Information Engineering University of Tsukuba Tsukuba Ibaraki 305-8573 Japan Master's Program in Science and Engineering University of Tsukuba Tsukuba Ibaraki 305-8573 Japan Phone: +81 29 853 5018 Fax: +81 29 Phone: +81 29 853 5345 Fax: +81 29 853 5345 College of Information Science and Engineering Ritsumeikan University Kusatsu Shiga 525-8577 Japan Phone: +81 77 561 5062 Fax: +81 77 561 5203

In this paper, we present a preconditioning method based on Incomplete Cholesky Decomposition (ICD) combined with a band-diagonalization strategy which enables an efficient ICD. The performance of the ICD preconditioner for sparse symmetric systems has a close relationship to the number of fill-ins of the exact Cholesky decomposition and the number can be decreased by the band-diagonalization. We consider an implicit surface reconstruction as a typical problem which has a property that the coefficient matrix can be transformed into a band-diagonal structure at a low computational cost. The effectiveness of the preconditioning is shown as a result of some numerical experiments. (© 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

关键词： Krylov subspace iterative methods incomplete Cholesky preconditioners band-diagonalization sparse symmetric systems surface reconstruction problem

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