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International Conference on Computer Supported Cooperative Work in Design

作者： A. Vivacqua D. Pinho J. de Souza S. Medeiros Computer Science Program Graduate School of Engineering COPPE DCC/IM-Institute of Mathematics Federal University of Rio de Janeiro Rio de Janeiro Rio de Janeiro Brazil DEL/POLI-Department of Electronics and Computing Federal University of Rio de Janeiro Rio de Janeiro Rio de Janeiro Brazil

We start from a case study of an architecture company and move on to a framework of agents to identify and inform conceptual design. The processes and problems exhibited by the company involved are quite common and can be found in other similar companies. Our intent is to instrument the current process using agent technology, in an effort to improve global awareness during the conceptual design phase, allowing the designers to design so as to facilitate later steps and optimize the process as a whole.

关键词： Process design Companies Design engineering Computer science Mathematics Computer architecture Instruments Design optimization Feedback Delay

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Reconfigurable parallel comparation architecture and its application to IP packet filters

Reconfigurable parallel comparation architecture and its app...

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IEEE International Conference on Field-programmable Technology (FPT)

作者： N. Aibe M. Yasunaga Graduate School Doctoral Program Systems & Information Engineering University of Tsukuba Tsukuba Ibaraki Japan Institute of Information Sciences and Electronics University of Tsukuba Tsukuba Ibaraki Japan

We propose a novel architecture for variable comparator named RPCA (Reconfigurable Parallel Comparation Architecture) making full use of the reconfigurability of FPGA. In the RPCA, an appropriate comparator to each task can be chosen and implemented under the speed/data-size tradeoff. An RPCA-based pack-filter prototype using XILINX XCV300E-6PQ240C and RealTeK RTL8201BL is developed and filtering speed of 120ns for 128 IPs and 1,360ns for 2,048 IPs are obtained under the speed/data-size trade-off.

关键词： Prototypes Field programmable gate arrays Information filtering Information filters Pattern matching Intrusion detection Spine Buffer storage Systems engineering and theory Cryptography

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A new method on assigning function types to line segments for function approximation-based image coding

A new method on assigning function types to line segments fo...

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IEEE Pacific Rim Conference on Communications, Computers and Signal Processing

作者： F. Kawazoe K. Toraichi P.W.H. Kwan Donoral Program Graduate School of Systems and lnformation Engineering University of Tsukuba Japan Institute of Information Science and Electronics University of Tsukuba Japan Core Research for Evolutional Science & Technology Program Japan Science and Technology Corporation Japan

This paper proposes a new method to determine the types of function for approximating line segments using an algorithm based on binary search. In the function approximation-based image coding, it is essential that the joint points between different types of line segment be extracted precisely. Through experiments, it is verified that the proposed method extracts straight lines and arcs more precisely than the earlier method.

关键词： Image segmentation Function approximation Image coding Paper technology Flowcharts Systems engineering and theory Information science Electronic mail Pixel Target tracking

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A method on tracking common boundaries of color regions in function approximation-based image coding

A method on tracking common boundaries of color regions in f...

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IEEE Pacific Rim Conference on Communications, Computers and Signal Processing

作者： T. Sugiyama P.W.H. Kwan K. Toraichi K. Katagishi Doctoral Program Graduate School of Systems and Information Engineering University of Tsukuba Japan Core Research for Evolutional Science & Technology Program Japan Science and Technology Corporation Japan Institute of Information Sciences and Electronics University of Tsukuba Japan

A boundary tracking method crucial to function approximation-based image coding is proposed that solves the problems caused by duplicate tracking the common boundaries of color regions when methods conventionally applied to bilevel raster images are inappropriately used. Experimental evaluation is performed to verify its effectiveness.

关键词： Function approximation Image coding Colored noise Color Image reconstruction Systems engineering and theory Electronic mail Performance evaluation Spline Internet

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Two variables compactly supported fluency sampling functions-based scalable conversion for fundus photograph

Two variables compactly supported fluency sampling functions...

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IEEE Pacific Rim Conference on Communications, Computers and Signal Processing

作者： S. Kai K. Katagishi K. Toraichi Y. Mitamura H. Murakami A. Koike T. Asami Doctoral Program Graduate School of Systems and Information Engineering University of Tsukuba Tsukuba Ibaraki Japan Institute of Informalion Sciences and Electronics University of Tsukuba Tsukuba Ibaraki Japan Graduate School of Engineering Hokkaido University Sapporo Japan KDDI Corporation Tokyo Japan KDD Research and Development Laboratories Inc. Kamifukuoka Saitama Japan

To match the different resolution capabilities of devices used in the telemedicine network, we must perform resolution conversion for fundus photograph to the required resolution with the information important to ophthalmologists' diagnosing well preserved. In this paper, in order to keep important information, such as color and shapes of blood vessels, optic disk and lesion areas on the fundus photograph after resolution conversion, we adopt three kinds of fluency functions to approximate shapes and propose a shape-directed resolution conversion method by using two variables compactly supported fluency sampling functions. The method leads the fundus photograph resolution conversion with features of scalability and good information preservation.

关键词： Sampling methods Interpolation Shape control Blood vessels Lesions Medical diagnostic imaging Biomedical optical imaging Photography Diseases Telemedicine

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Delay-dependent H∞ control stabilization of linear systems with time-varying delays 4

Delay-dependent H∞ control stabilization of linear systems ...

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4th IFAC Workshop on Time Delay Systems, TDS 2003

作者： Palhares, R.M. Campos, C.D. Leles, M.C.R. Ekel, P.Ya. D'Angelo, M.F.S.V. Department of Electronics Engineering Federal University of Minas Gerais Av. Antonio Carlos 6627 Belo Honzonte-MG31270-010 Brazil Graduate Program in Electrical Engineering Pontifical Catholic Univ. of Minas Gerais Av. Dom Jose. Gaspar 500 Belo Horizonte-MG30535-610 Brazil Faculdade de Ciencia e Tecnalogia de Mantes Claros Praqa da Tecnalogia 77 Sao Joao Monies Claros-MG39400-307 Brazil

This paper proposes a Linear Matrix Inequality (LMI) approach to the robust H∞ control stabilization problem of uncertain continuous-or discrete-time linear time-in variant systems with time-varying delays in the state vector and control input. It is derived sufficient delay-dependent conditions for the control stabilization problem, where both the size of the time-varying delay and the size of it time derivative (applicably only in the continuous-time case) play a crucial role for the closed-loop stability with a guaranteed H∞ level. The solutions that are found for the H∞ control problem are similar or less conservative, when compared to others approaches. © 2003 IFAC.

关键词： Linear matrix inequalities

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Delay-dependent H ∞ control stabilization of linear systems with time-varying delays 1

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IFAC Proceedings Volumes 2003年第19期36卷 257-262页

作者： R.M. Palhares C.D. Campos M.C.R. Leles P.Ya. Ekel M.F.S.V. D'Angelo Department of Electronics Engineering Federal University of Minas Gerais Av. Antônio Carlos 6627 31270-010 Belo Horizonte - MG - Brazil. Graduate Program in Electrical Engineering Pontifical Catholic Univ. of Minas Gerais Av. Dom José Gaspar 500 30535-610 Belo Horizonte - MG - Brazil. Faculdade de Ciência e Tecnologia de Montes Claros Praça da Tecnologia 77 - São João 39400-307 Montes Claros - MG - Brazil

This paper proposes a Linear Matrix Inequality (LMI) approach to the robust H ∞ control stabilization problem of uncertain continuous- or discrete-time linear time-invariant systems with time-varying delays in the state vector and control input. It is derived sufficient delay-dependent conditions for the control stabilization problem, where both the size of the time-varying delay and the size of its time derivative (applicably only in the continuous-time case) play a crucial role for the closed-loop stability with a guaranteed H ∞ level. The solutions that are found for the H ∞ control problem are similar or less conservative, when compared to others approaches.

关键词： Robust H ∞ control time delay systems linear systems linear matrix inequalities

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Working ratio estimation method for a long distance fixed wireless access (22 GHz band, 6.3 Mbit/s) link

Working ratio estimation method for a long distance fixed wi...

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IEEE Pacific Rim Conference on Communications, Computers and Signal Processing

作者： Y. Ohmiya K. Katagishi A. Vasilache T. Asami H. Murakami K. Toraichi Doctoral Program Graduate School of Systems and Information Engineering University of Tsukuba Tsukuba-shi Ibaraki Japan Institute of Information Sciences and Electronics University of Tsukuba Tsukuba-shi Ibaraki Japan Japan Science and Technology Corporation University of Tsukuba TARA Center Ibaraki Japan KDDI R&D Laboratories Inc. Kamifukuoka-shi Saitama Japan KDDI Corporation KDDI bldg. Shinjuku-ku Tokyo Japan

This paper discusses a method to determine the optimal node location before a long distance FWA network (22 GHz band, 6.3 Mbit/s) is set. During our 3 years experiment, we found out that the long distance FWA net with 2 links (about 60 km) was down for approximately 42 hours per year due to heavy rain fall conditions. This means that the long distance FWA net is practicable to some extent. We discuss a method to estimate the working ratio between two unknown locations using AMeDAS weather data. By using this method, an appropriate node location can be decided before FWA net is deployed. This approach can improve the working ratio in the sense of link-up continuation.

关键词： Rain Space technology Costs Systems engineering and theory Research and development Laboratories Telegraphy Delay Interference Space stations

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TAST-Trademark Application Assistant

TAST-Trademark Application Assistant

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IEEE International Conference on Image Processing

作者： P.W.H. Kwan K. Toraichi K. Kameyama F. Kawazoe K. Nakamura Doctoral Program Graduate School of Engineering University of Tsukuba Japan Institute of Information Sciences and Electronics University of Tsukuba Japan Doctoral Program Graduate School of Systems and Information Engineering University of Tsukuba Japan

In this paper, a Trademark Application Assistant (TAST) that aims to speed up the process of a successful trademark application is proposed. The core of TAST is a similarity-based image retrieval system that makes use of relaxation matching on extracted contour segments. A novelty of this research lies in the processing architecture introduced for adapting the highly effective but computation expensive relaxation matching algorithm to real-time image retrieval. Preliminary results illustrating the quality of matching and the scalability of the processing architecture in terms of response time are included. The proposed architecture is not limited to using relaxation matching based servers, but is also applicable to other types of matching server as well.

关键词： Trademarks Image retrieval Computer architecture Scalability Delay Character recognition Image databases Hardware Gray-scale Systems engineering and theory

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Human systems integration and advanced technology in engineering department workload and manpower reduction

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NAVAL ENGINEERS JOURNAL 2003年第1期115卷 57-65页

作者： Lively, KA Seman, AJ Kirkpatrick, M KENNETH A. LIVELY graduated from the University of Colorado with a BS in applied mathematics and an MS in mathematics in 1976 and from the Massachusetts Institute of Technology with an MS in electrical engineering and the degree ocean engineer in naval architecture and marine engineering in 1984. He retired from the U.S. Navy in 1989 after 23 years of service. Assignments included electrical officer on the USS Constellation (CV 64) project engineer for the DDG 51 machinery control system (NAVSEA) and DDG 51 Technical Director (NAVSEA). He was vice president of the PDI Division of Bird-Johnson Company from July 1989 to November 1998 where he managed various gas turbine and machinery controls related development projects. He joined Anteon Corporation's Systems Engineering Group as senior controls engineer in December 1998 where he provided technical support to the integrated power systems program (NAVSEA PMS 510) and managed the Office of Naval Research Afloat Laboratory. DR. MARK KIRKPATRICK is currently an independent consultant in human factors and work-load/manning analysis and modeling. He holds a Ph.D. degree in experimental psychology from The Ohio State University and has 34 years of experience in applied human factors. From 1982 through 2000 Dr. Kirkpatrick served as the senior vice president of Carlow International. Prior to joining Carlow in 1982 Dr. Kirkpatrick served as a member of the technical staff at North American Rockwell's Missiles Division and as a project director and vice president for Essex Corporation. His areas of expertise include workload simulation task analysis operator-in-the-loop simulation human performance experimentation statistical analysis and human factors T&E. He has directed and/or participated in human factors projects for the U.S. Navy U.S. Army NASA Department of Transportation the U.S. Nuclear Regulatory Commission and private industry. ANTHONY J. SEMAN III is the technical manager for the reduced ship's crew by virtual presence (RSVP) advanced technology d

Aboard current ships, such as the DDG 51, engineering control and damage control activities are manpower intensive. It is anticipated that, for future combatants, the workload demand arising from operation of systems under conditions of normal steaming and during casualty response will need to be markedly reduced via automated monitoring, autonomous control, and other technology initiatives. Current DDG 51 class ships can be considered as a manpower baseline and under Condition III typical engineering control involves seven to eight watchstanders at manned stations in the Central Control Station, the engine rooms and other machinery spaces. In contrast to this manning level, initiatives such as DD 21 and the integrated engineering plant (IEP) envision a partnership between the operator and the automation system, with more and more of the operator's functions being shifted to the automation system as manning levels decrease. This paper describes some human systems integration studies of workload demand reduction and, consequently, manning reduction that can be achieved due to application of several advanced technology concepts. Advanced system concept studies in relation to workload demand are described and reviewed including. Piecemeal applications of diverse automation and remote control technology concepts to selected high driver tasks in current DDG 51 activities. Development of the reduced ship's crew by virtual presence system that will provide automated monitoring and display to operators of machinery health, compartment conditions, and personnel health. The IEP envisions the machinery control system as a provider of resources that are used by various consumers around the ship. Resource needs and consumer priorities are at all times dependent upon the ship's current mission and the availability of equipment pawnbrokers.

关键词： Naval warfare

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