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工程热物理学报 2005年第5期26卷 808-810页

作者：于志家 F Shiraishi 大连理工大学化学工程研究所辽宁大连116012 Department of Biochemical Engineering and Science Faculty of Computer Science and Systems EngineeringKyushu Institute of Technology680-4 KawazuIizuka 820-8502Japan

建立了封闭舱室内氧气再生与二氧化碳降浓的数学模型,采用S-系统在对数空间内对模型进行了数值解析,通过计算机模拟计算,讨论了系统中氧气和二氧化碳浓度随时间的变化情况,以及小球藻的液相培植对气相中氧气浓度的影响。计算结果表明通... 详细信息

建立了封闭舱室内氧气再生与二氧化碳降浓的数学模型,采用S-系统在对数空间内对模型进行了数值解析,通过计算机模拟计算,讨论了系统中氧气和二氧化碳浓度随时间的变化情况,以及小球藻的液相培植对气相中氧气浓度的影响。计算结果表明通过培植小球藻来再生氧气并减少二氧化碳,维持密封舱内生命生存是可能的。

关键词：氧气再生模拟计算 S-系统密封舱室

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IMPROVEMENT OF FAULT DETECTION METHOD FOR NONLINEAR BLACK-BOX systemS BASED ON MULTI-FORM QUASI-ARMAX MODELING

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IFAC Proceedings Volumes 2005年第1期38卷 101-106页

作者： K. Kumamaru K. Inoue F. Tsubouchi T. Söderström Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology Kawazu 680-4 Iizuka 820-8502 Fukuoka Japan Department of Automatic Control and Systems Analysis Institute of Technology Uppsala University P.O.Box 27 Uppsala Sweden

This paper is concerned with improvement of the KDI-based fault detection method so far developed by authors for nonlinear black-box systems. When modeling the system, Quasi-ARMAX model with multi-model structure is used. A fault due to unexpected change in system parameters will appear as the change of identified model. Kullback discrimination Information (KDI) can then be used as the fault detection index to evaluate the distortion in identified model. Several schemes to improve the fault detection performance are proposed, as well as the realization of a kind of fault isolation function based on a recognition approach in the model parameter space. The effectiveness of the method is verified through simulation studies on the ship propulsion system constructed for benchmark test.

关键词： Fault detection Kullback discrimination information non-linear system parameter estimation quasi-ARMAX model ship propulsion system

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A design and development of dialog pattern based bulletin board tool

A design and development of dialog pattern based bulletin bo...

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IADIS International Conference on Cognition and Exploratory Learning in Digital Age, CELDA 2005

作者： Takaoka, Ryo Kusano, Kohei Okamoto, Toshio Faculty of Education Yamaguchi University 1677-1 Yoshida Yamaguchi-City Yamaguchi 753-8513 Japan Graduate School of Computer Science and Systems Engineering Kyushu Institute of Technology 680-4 Kawazu Iizuka-City Fukuoka 820-8502 Japan Graduate School of Information Systems University of Electro-Communications 1-5-1 Chofugaoka Chofu-City Tokyo 182-8585 Japan

ISBN: (纸本)9781627483308

This study is to explore a method of learning support in e-Learning environment including some learning supporters. Especially we develop a learning support method of distance teaching assistants on the Web for problem solving based group learning. We need to explore the learning models of next generation in knowledge society. Simultaneously, challenge to new pedagogy in learning and education with e-Learning environment is desired. From a viewpoint of learning support, learners can be concerned with learning supporters such as other teachers, domain experts and learners who have already studied the subject matter as well as a teacher at the face-to-face lesson in the learning environment. So, the learning support model needs to include some tools which have some functions of the learning supports. In this paper, we extract learning support patterns from an analysis of dialogue patterns between learners and distance teaching assistants. Moreover, we describe the outline of a bulletin board tool based on the learning support patterns.

关键词： Teaching

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Development of QTAT online electronic circuit patterning system

Development of QTAT online electronic circuit patterning sys...

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作者： Wakasugi, Katsuhiko Wakimoto, Satoshi Akamichi, Takayuki Nakada, Akira Kubota, Hiroshi Inokuchi, Tsuneo Suzuki, Shinji Aikawa, Sou Kosaka, Kouji Nakamura, Kazumitsu Morimoto, Tatsuo IEEE Graduate School of Science and Technology Kumamoto University Kumamoto 860-8555 Japan Kumamoto Technology Center Sony Semiconductor Kyushu Corporation Kumamoto 869-1102 Japan Ushio Inc. Yokohama 225-0002 Japan Tecnos Co. Ltd. Nara 630-8113 Japan Kumamoto Technology Inc. Kumamoto 861-2202 Japan Kumamoto Technology and Industry Foundation Kumamoto 861-2202 Japan New Industry Creation Hatchery Center Tohoku University Sendai 980-8579 Japan Japan Society of Applied Physics Institute of Electronics Information and Communication Engineering Department of Electrical and Computer Engineering Faculty of Engineering Kumamoto University Graduate School of Science and Technology Kumamoto University Shock Wave and Condensed Matter Research Center Kumamoto University Sony Semiconductor Kyushu Corporation Kagoshima Japan Sony Semiconductor Kyushu Corporation Kumamoto Technology Center Kumamoto Japan Department of Electronic Engineering Tokyo University of Agriculture and Technology Tokyo Tecnos Co. Ltd. Nara Japan Tokyo Technology Co. Ltd. Tokyo Japan Kumamoto Technology Co. Ltd. Kumamoto Japan Japan Society of Precision Engineering Kumamoto Technology and Industry Foundation Kumamoto Japan American Vacuum Society New Industry Creation Hatchery Center Tohoku University

An arbitrary pattern exposure system has been developed by employing a liquid crystal display (LCD) with 1600 × 1200 pixels for the formation of projection images in place of a conventional reticle. The minimum pattern size becomes 11.5 μm, which corresponds to the aperture size of each pixel on the LCD. For the purpose of quick turnaround time (TAT), the exposure system was directly connected to the circuit design system with the transmission control protocol/internet protocol network. From the experimental results on patterning of a typical electronic circuit data with the area of 46 × 46 mm, it was confirmed that the TAT from the output of design data to the finish of the exposure becomes less than 28 min. By using this system, reduction of the production cost in the printed wiring boards fabrication is expected. © 2005 IEEE.

关键词： Online systems

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A Brownian Ratchet Model of Actin Polymerization Motor by using Extended Scaled Particle Theory

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AIP Conference Proceedings 2004年第1期708卷 294-297页

作者： Masayuki Irisa Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology Iizuka Fukuoka 820‐8502 JAPAN

One of the types of movements, e.g. protoplasmic movement, observed in cells are caused by the polymerization of the actin molecules. Recently, attempts to reveal the mechanism of force generation by using a Brownian ratchet model were reported. The load, e.g. the cell membrane, is pushed by the actin polymerization occurred at the head (barbed end) of the filament close to the load. Relative position between the head of the actin filament and the load are fluctuated as the Brownian motion. We focused on the association of the actin monomer at the head of the actin filament. To simplify the problem, association of the two actin monomers are modeled as the hard fused spheres and studied theoretically by using the extended scaled particle theory (XSPT) which we have developed. The mean force between two molecules is attractive as the result of the excluded volume *** results by using XSPT show the probability that the force of the actin filament against the load is determined not only by the fluctuation of position of the head of the actin filament but also by the fluctuation of position of the surrounding free actin monomers moving around the head of the filament. This suggests that thermal motion of the surrounding free actin monomers is also the origins of the force of the actin polymerization motor through the excluded volume effect.

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Conformational transitions of a semiflexible polymer in a liquid crystalline phase

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AIP Conference Proceedings 2004年第1期708卷 128-129页

作者： Akihiko Matsuyama Department of Biochemical Engineering and Science Faculty of Computer Science and System Engineering Kyusyu Institute of Technology Kawazu 680‐4 Iizuka Fukuoka 820‐8502 Japan

Conformations of a single semiflexible polymer chain dissolved in a low molecular weight liquid crystalline solvent (nematogen) are examined by using a mean field theory. We takes into account a stiffness and partial orientational ordering of the polymer. As a result of an anisotropic coupling between the polymer and nematogen, we predict a discontinuous (or continuous) phase transition from a condensed‐rodlike conformation to a swollen‐one of the polymer chain, depending on the stiffness of the polymer. We also study a single polymer chain confined in a smectic phase.

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Molecular-dynamics simulation of crack growth with crystal nucleation in amorphous metal

Molecular-dynamics simulation of crack growth with crystal n...

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European Congress on Computational Methods in Applied sciences and engineering, ECCOMAS 2004

作者： Matsumoto, Ryosuke Nakagaki, Michihiko Nakatani, Akihiro Kitagawa, Hiroshi Department of Mechanical Systems Engineering Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology 680-4 Kawazu Iizuka-City Fukuoka 820-8502 Japan Department of Adaptive Machine Systems Graduate School of Engineering Osaka University 2-1 Yamada-Oka Suita-City Osaka 565-0871 Japan

The internal structural changes around the crack-tip and the pertinent crack growth behavior in an amorphous metal are studied by a large scale molecular dynamics (MD) simulation. The Finnis-Sinclair potential for α-iron is used as an interatomic potential. The model amorphous metal was created by melting-rapid quenching simulation. The crack opens in similar fashion and it has smooth surfaces during the amorphous state. As it deformed, nano-scaled crystalline phase grows around the crack-tip. The distribution of deformation zones and deformation mechanism are significantly altered. The grains are not deformed while they are relatively small. The emission of dislocations from the crack-tip is observed, after the crystal phase covered the crack-tip surfaces. The grain size appeared small in the vicinity of the crack-tip, and becomes gradually large as it separates form the crack-tip.

关键词： Molecular dynamics

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Toward construction of a mobile system with long-range RFID sensors

Toward construction of a mobile system with long-range RFID ...

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IEEE Conference on Cybernetics and Intelligent systems

作者： T. Mishima N. Abe K. Tanaka H. Taki Kyusyu Institute of Technology Graduate School of Computer Science and Systems Engineering Iizuka Fukuoka Japan Kyushu Institute of Technology Iizuka Fukuoka Japan Wakayama University Wakayama Japan

A simple mobile system is described for humans and robots with a radio-frequency identification (RFID) tag sensor. In this paper, the system assumes to be used in a hospital to identify the location of patients and recognize their state. At first we use one positive RFID sensor. The range of this directional antenna is long (about 5 meters, 2 meters) and an RIFD antenna is set on a rotating pan-tilt platform we made, making the best use of the directional sensor. It is difficult to recognize a person with an ID tag because the microwave output from the antenna attenuates by human's moisture. However, we confirm the effectiveness of this RFID system against the people who have a tag by experiments. Experimental results show that this system is available for identifying a person. At last we were able to make the extended system, using three RFID sensors without the rotating platform

关键词： Radiofrequency identification Sensor systems Microwave antennas Hospitals Moisture Radio frequency computer science systems engineering and theory Humans Robot sensing systems

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A new task scheduling method for distributed programs which require memory management in grids

A new task scheduling method for distributed programs which ...

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Workshops on Applications and the Internet (SAINT)

作者： H. Koide Y. Oie Department of Artificial Intelligence Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology Fukuoka Japan Department of Computer Science and Electronics Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology Fukuoka Japan

In the grid applications, it is very likely that object oriented languages, like Java and Ruby, are employed as well as large-scale semi-structured data like XML. However, their inherent dynamic memory management has to suspend the execution of all the tasks running on processors when it is invoked. This adversely affects the grid computing severely unless the task scheduling system can avoid it with some special mechanism. We propose a new task scheduling method, referenced to as CP/MM, which can efficiently schedule tasks for applications requiring memory management. The underlying concept is to consider the cost due to memory management when the task scheduling system allocates ready coarse grain tasks, or macro-tasks, to processors. We have developed three task scheduling modules including an implementation of CP/MM into a task scheduling system is implemented on Java RMI (remote method invocation) communication infrastructure. Moreover, we evaluate the fundamental performance of CP/MM in two ways. The first is the performance evaluation of CP/MM which is applied to a small but practical test application program on a PC cluster. The second is the performance evaluation for test programs which have many tasks with complicated dependency relations on the test bed system consisting of computers on our two campuses located at a distance of approximately 32 km. These experimental results show that CP/MM can successfully prevent high priority macro-tasks from being affected by the garbage collection arising from the memory management, so that CP/MM can efficiently schedule distributed programs whose critical paths are relatively long.

关键词： Memory management Processor scheduling Grid computing Large-scale systems computer networks Java Application software computer science XML Data engineering

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New balanced-type electronic choke used in the terminal of a wire communication system

New balanced-type electronic choke used in the terminal of a...

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International Conference on Telecommunications Energy (INTELEC)

作者： A. Katsuki T. Matsumoto Department of Computer Science and Electronics Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology Fukuoka Japan

The powered terminal in most wire communication systems needs to separate AC signals and DC supply power in its input part connected to the communication lines. Well-known separators usually utilize a combined circuit of inductors and capacitors. When the lowest frequency of the signal is low, the inductance becomes high and the size of the inductor increases. Our original communication system consists of low-power DC-DC converters. Because a converter in the powering terminal operates not only as power supply but also as transmitter, it is preferable that the electronic choke be bidirectional. A new balanced-type low-loss electronic choke having small inductors and an amplifier is proposed in this paper.

关键词： Inductors Wire Power supplies Particle separators Circuits Capacitors Frequency Inductance DC-DC power converters Transmitters

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