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Development of marine diesel particulate filter using high frequency induction heating

IEEJ Transactions on Industry Applications 2010年第10期130卷 1193-1194页

作者： Hatanaka, Yoshihiro Takashima, Kohei Kifune, Hiroyasu Course of Marine System Engineering Tokyo University of Manne Science and Technology 2-1-6 Etchujima Koto-ku Tokyo 135-8533 Japan

Novel marine diesel particulate filter (DPF) using high frequency induction heating is developed. Particulate matter exhausted from diesel engine is trapped by the DPF and is successfully burned by induction heating. The effectiveness of the DPF system is verified by experiments. © 2010 The Institute of Electrical Engineers of Japan.

关键词： Diesel engines

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"Stick-Shaped Window Search (SSWS)" block matching algorithm for motion vector estimation

"Stick-Shaped Window Search (SSWS)" block matching algorithm...

引用

International Conference on Signal Processing Proceedings (ICSP)

作者： Tadayoshi Enomoto Nobuaki Kobayashi Graduate School of Science and Engineering Information and System Engineering Course Chuo University Bunkyo Tokyo Japan

To significantly reduce the number of block-matching (BM) processes in motion vector estimation for HDTV, we have developed an extremely fast block matching (BM) algorithm that we call a "Stick-Shaped Window Search (SSWS)" BM algorithm for H.264/AVC. The algorithm consists of three steps: (1) sub-sampling BM in a reduced number of stick-shaped windows, (2) filternate eight-direction sub-sampling BM, and (3) cyclic small-diamond BM. For HDTV the algorithm not only improves full search (FS) processing speed by a factor of up to 2,716, but also that of a simplified unsymmetrical-cross multi-hexagon-grid search (S-UMHS) by a factor of up to 7.87, while achieving the same visual quality as that of FS.

关键词： Signal processing algorithms Pixel HDTV Encoding Agricultural machinery Video sequences Radio frequency

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Evaluation of a use-case-driven requirements analysis tool employing web UI prototype generation

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WSEAS Transactions on Information science and Applications 2010年第2期7卷 273-282页

作者： Ogata, Shinpei Matsuura, Saeko Course of Functional Control Systems Graduate School of Engineering Shibaura Institute of Technology 307 Fukasaku Minuma-ku Saitama-City Saitama 337-8570 Japan Department of Electronic Information Systems College of System Engineering and Science Shibaura Institute of Technology 307 Fukasaku Minuma-ku Saitama-City Saitama 337-8570 Japan

It has been widely acknowledged that ambiguous or incomplete customer requirements are a major reason for the failure of software development projects. A key example of this is the inconsistency between implementation image and specifications provided in the early stages of software development. To address this, we propose a method for automatic generation of user interface prototypes for developing Web-based business applications, based on the requirements specifications defined in the Unified Modeling Language (UML). In this study, we compare the proposed method with traditional use case modeling to evaluate the effectiveness of the proposed method.

关键词： Unified Modeling Language

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A method of automatic integration test case generation from UML-based scenario

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WSEAS Transactions on Information science and Applications 2010年第4期7卷 598-607页

One key to success for high quality enterprise information systems development is to validate the customers' requirements sufficiently at the early stage. Scenarios are an effective means to an end because they make it possible to represent various situations of system usage. Most scenarios are defined by using a natural language or such a formal language as Unified Modeling Language (UML) and describe normal, alternative, and exceptional service flows from the point of view of system usage. As a result, scenarios make it easy for the customers to confirm their requirements intuitively because of the concreteness. On the other hand, based on the V-model, which is well-known software development process and denotes the correspondence of requirement analysis stage to integration test stage, it is desirable that the testers should test the system by using the test cases derived from the validated scenarios. We have proposed a UML-based requirements analysis (RA) model with automatic prototype system generation for enterprise Web application development. This paper proposes a way to efficiently create reliable test cases from the scenarios that have been validated by the customers using the prototype system which was generated by the RA model.

关键词： Integration testing

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Fast sub-sampling block matching algorithm employing adaptively assigned sizes and locations of search windows

Fast sub-sampling block matching algorithm employing adaptiv...

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IEEE International Symposium on Circuits and systems (ISCAS)

作者： Tadayoshi Enomoto Nobuaki Kobayashi Shimon Isaka Graduate School of Science and Engineering Information and System Engineering Course Chuo University Bunkyo Tokyo Japan

ISBN: (纸本)9781424438273

To significantly reduce the number of block-matching (BM) processes for motion vector estimation (ME), we have developed a fast sub-sampling block matching (FSBM) algorithm for H.264. FSBM consists of three steps: a pre-processing step to define conditions for the second step, an alternate sub-sampling process to quickly find the precise location at which the third step starts, and cyclic four-point searches to pinpoint the final motion vector. FSBM not only improves the processing speed of a full search (FS) algorithm by a factor of up to 866, but also that of the simplified unsymmetrical-cross multi-hexagon-grid search (S-UMHS) algorithm for HDTV by a factor of up to 2.18, while achieving the same visual quality as that of FS.

关键词： Signal processing algorithms HDTV systems engineering and theory Motion estimation Video coding TV Decoding Degradation Standards development

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An efficient hardware accelerator for power grid simulation

An efficient hardware accelerator for power grid simulation

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IEEE International Symposium on Circuits and systems (ISCAS)

作者： Taiki Hashizume Hisako Sugano Shinichi Nishizawa Masaya Yoshikawa Masahiro Fukui EECS Course Graduate School of Science and Engineering Ritsumeikan University Kusatsu Shiga Japan Department of VLSI System Design Ritsumeikan University Kusatsu Shiga Japan Department of Information Engineering Meijo University Nagoya Aichi Japan

ISBN: (纸本)9781424438273

With the deep submicron technologies, IR drop and electromigration have become remarkable by decreasing of the power supply voltage. Therefore, power grid optimization becomes important to achieve the stable operation of large scale integration (LSI). However, it requires large computation time. In this paper, we propose a novel power grid simulation technique which can be applied to a large scale power grid. The proposal technique achieves ldquohigh speed processing by hardware acceleratorrdquo and ldquorealization of high accuracy computation with fixed point arithmeticrdquo. The proposed power grid simulation algorithm achieves 32 times more high speed processing than software processing. The accuracy is proven by experimental comparison with SPICE simulation.

关键词： Hardware Power grids Computational modeling Large scale integration Electromigration Power supplies Voltage Large-scale systems Proposals Acceleration

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Residual Stress Estimation of Ti Casting Alloy by X‐ray Single Crystal Measurement Method

引用

AIP Conference Proceedings 2008年第1期989卷 96-100页

作者： A. Shiro M. Nishida T. Jing aAdvanced Course of Mechanical System engineering Kobe City College of Technology Kobe 651‐2194 Japan bDepartment of Mechanical engineering Kobe City College of Technology Kobe 651‐2194 Japan cSchool of Materials Science and Engineering Harbin lnstitute of Technology Harbin 150001 China

Recently, titanium casting technology attracts attention in the industrial fields. These casting metals are including a various residual stresses due to the heat shrinkage and inclusion particles, et al. In order to apply the casting technology, the accurate estimation of residual stresses is desired in many cases. In this study, it aims at the nondestructive stress evaluation of titanium casting material by the X‐ray stress measurement technique. At first in this study, the sin2ψ method which used in the usual X‐ray stress measurement was tried to measure the residual stresses. However, it was unsuitable for measurement of titanium casting material because of including coarse grains. Therefore, another X‐ray method for single crystal system was employed to coarse crystal grains, in order to investigate the possibilities of residual stress estimating. Four‐axes sample table which can set the both of tilt angle and rotate one on the sample surface was prepared. The stereographic diagrams and the theory of elasticity were used to measure the single crystal stresses on the sample surface.

关键词：

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A Low Power 90-nm CMOS Motion Estimation Processor Implementing Dynamic Voltage and Frequency Scaling (DVFS) and Fast Motion Estimation Algorithm

A Low Power 90-nm CMOS Motion Estimation Processor Implement...

引用

2008 IEEE International Symposium on Circuits and systems (ISCAS 2008), vol.5

作者： Nobuaki Kobayashi Tadayoshi Enomoto Graduate School OF Science and Engineering Information and System Engineering Course Chuo University Tokyo Japan

A 90-nm CMOS motion estimation (ME) processor was developed by employing dynamic voltage and frequency scaling (DVFS) to greatly reduce the dynamic power. To make full use of the advantages of DVFS, a fast ME algorithm and a small on-chip DC/DC converter were also developed. The fast ME algorithm can adaptively predict the optimum supply voltage (V_(D)) and the optimum clock frequency (f_(c)) before each block matching process starts. Power dissipation of the ME processor, which contained an absolute difference accumulator as well as the on-chip DC/DC converter and DVFS controller, was reduced to 29.1 (mu)W, which was only 3percent that of a conventional ME processor.

关键词： Motion estimation CMOS process Dynamic voltage scaling Frequency estimation

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X-Ray Stress Measurement of Titanium Casting Materials 11

X-Ray Stress Measurement of Titanium Casting Materials

引用

11th World Conference on Titanium, Ti-2007

作者： Shiro, Ayumi Nishida, Masayuki Jing, Tian Advanced Course of Mechanical System engineering Kobe City College of Technology Kobe651-2194 Japan Department of Mechanical engineering Kobe City College of Technology Kobe651-2194 Japan School of Materials Science and Engineering Harbin Institute of Technology Harbin150001 China

ISBN: (纸本)9784889034066

Recently, titanium casting technology attracts attention in the industrial fields. These casting metals are including a various residual stresses due to the heat shrinkage and inclusion particles, et al. In order to apply the casting technology, the accurate estimation of residual stresses is desired in many cases. In this study, it aims at the nondestructive stress evaluation of titanium casting material by the X-ray stress measurement technique. At first in this study, the sin2ψ method which used in the usual X-ray stress measurement was tried to measured the residual stresses. However, it was unsuitable for measurement of titanium casting material because of including coarse grains. After corrosion treatment of the sample surface, the coarse crystal grains are observed on surface, and it could be look by the naked eye. Therefore, another X-ray method for single crystal system was employed to coarse crystal grains, in order to investigate the possibilities of residual stress estimating. Four-axes sample table which can set the both of tilt angle and rotate one on the sample surface was prepared. The stereographic diagrams and the theory of elasticity were used to measure the single crystal stresses on the sample surface. © Ti-2007 - Proceedings of the 11th World Conference on Titanium. All Rights Reserved.

关键词： Residual stresses

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Development of tendon-driven assistance manipulator system by air pressure control

Development of tendon-driven assistance manipulator system b...

引用

SICE Annual Conference

作者： Shinichiro Nakamura Osamu Oyama Toshihiro Yoshimitsu Mechanical Engineering Major Science and Engineering Research Course Graduate School of Meiji University Kanagawa Japan Welfare system Engineering Kanagawa institute of Technology Kanagawa Japan

ISBN: (纸本)4907764278

We suggest to develop the tendon-driven 2-link manipulator driven by pneumatic cylinder as the assist care lift for the rising and sitting on a chair of elderly people, disabled people or wheelchair users. The tendon-driven manipulator system developed in this subject makes use of the pneumatic cylinder as an actuator. By means of the flexible action caused by the compressibility of the air, the welfare system using pneumatic actuators can be expected as the human-friendly assist. This system is constructed by two parts, i.e., one is the tendon-driven manipulator and the other is actuator part using pneumatic cylinder, and they are separated. The pneumatic cylinder and each link are connected by the tendon through the pulley. In this research, taking account of using the manipulator as care lift, we verified the effect of pneumatic drive, in the view point of the precision of manipulator trajects in case of actual human care.

关键词： Pressure control Tendons Engine cylinders Pneumatic actuators Pulleys Medical services Switches Manipulators Wheelchairs Air safety

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