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IEEE International Symposium on computer Aided Control system Design (CACSD)

作者： Masanobu Koga Satoru Anan Kentaro Yano Department of Systems Design and Informatics Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology Fukuoka Japan

ISBN: (纸本)9781424422210

This paper proposes a method which gives a state space realization of the linear systems with algebraic loops not only in numerical format but also in symbolic format and guarantees that the order of the system is preserved. The method uses an adjacency matrix in graph theory for the modeling of the control systems and uses the matrix inversion lemma to calculate the inverse of matrix symbolically and to obtain the symbolic state space realizations. We have developed a new software platform for modeling and simulation of control systems using the proposed method.

关键词： Control systems USA Councils

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Period and link length of logistic map over integers

Period and link length of logistic map over integers

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International Symposium on Information Theory and Its Applications, ISITA

作者： Takeru Miyazaki Shunsuke Araki Satoshi Uehara Faculty of Environmental Engineering University of Kitakyushu Fukuoka Japan Graduate School of Computer Science and Systems Engineering Kyushu Institute of Technology Fukuoka Japan

ISBN: (纸本)9781424420681

On the designing of a pseudo-random number generator from a sequence generated by the logistic map, period and link length of the sequence are important for good randomness. In this paper, we focus loops and links of sequences generated by the logistic map over integers. Since their periods and link lengths of them depend on an available bit. We consider the relation between the available bit and expected values of them.

关键词： Logistics Random number generation Design engineering Chaos Cryptography Floors Information theory Application software computer science systems engineering and theory

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A study on occurrence rates per bit for the logistic map over integers

A study on occurrence rates per bit for the logistic map ove...

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International Symposium on Information Theory and Its Applications, ISITA

作者： Shunsuke Araki Takeru Miyazaki Satoshi Uehara Graduate School of Computer Science and Systems Engineering Kyushu Institute of Technology Fukuoka Japan The Faculty of Environmental Engineering University of Kitakyushu Kitakyushu Japan

ISBN: (纸本)9781424420681

We are investigating the logistic map over integers with finite precisions and sequences out-putted by the iterative mapping. In our proposed simple pseudo-random number generator with the logistic map over integers, we implicitly assumed that 0 and 1 occurrence frequencies per bit of outputs by the map are nearly equal. By some numerical experiments, we got the conjecture that occurrence rates per bit are nearly equal for many bits of 2n-bit values in the intermediate step of the map by one iteration and many iterations.

关键词： Logistics Frequency Chaos Cryptography Random number generation Equations Information theory Application software computer science systems engineering and theory

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Yeast cells proliferation on various strong static magnetic fields and temperatures

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Journal of Physics: Conference Series 2009年第1期156卷

作者： E S Otabe S Kuroki J Nikawa Y Matsumoto T Ooba K Kiso H Hayashi Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology 680-4 Kawazu Iizuka Fukuoka 820-8502 Japan Fukuoka University 8-19-1 Nanakuma Jonan-ku Fukuoka 814-0180 Japan Fukuoka Industrial Technology Center 1465-5 Aikawa-machi Kurume Fukuoka 839-0861 Japan Fukuoka Regional Taxation Bureau 2-11-1 Hakataekihigashi Hakata-ku Fukuoka 812-8547 Japan Kyushu Power Electric 2-1-47 Shiobaru Minami-ku Fukuoka 815-8520 Japan

The effect of strong magnetic fields on activities of yeast cells were investigated. Experimental yeast cells were cultured in 5 ml of YPD(Yeast extract Peptone Dextrose) for the number density of yeast cells of 5.0 ±0.2 x 106/ml with various temperatures and magnetic fields up to 10 T. Since the yeast cells were placed in the center of the superconducting magnet, the effect of magnetic force due to the diamagnetism and magnetic gradient was negligibly small. The yeast suspension was opened to air and cultured in shaking condition. The number of yeast cells in the yeast suspension was counted by a counting plate with an optical microscope, and the time dependence of the number density of yeast cells was measured. The time dependence of the number density of yeast cells, ρ, of initial part is analyzed in terms of Malthus equation as given by ρ = ρo exp(kt), where k is the growth coefficient. It is found that, the growth coefficient under the magnetic field is suppressed compared with the control. The growth coefficient decreasing as increasing magnetic field and is saturated at about 5 T. On the other hand, it is found that the suppression of growth of yeast cells by the magnetic field is diminished at high temperatures.

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Trial Formation of Artificial Bone by Inkjet Powder-Layered Manufacturing

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International Journal of Automation technology 2008年第3期2卷 156-161页

作者： Yamazawa, Kenji Anzai, Masahiro Yokota, Hideo Himeno, Ryutaro Suzuki, Hiroshi Narahara, Hiroyuki Suzuki, Shigeki Advanced Engineering Team Advanced Development and Supporting Center RIKEN 2-1 Hirosawa Wako-shi Saitama351-0198 Japan Computational Biomechanics Unit RIKEN 2-1 Hirosawa Wako-shi Saitama351-0198 Japan Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology 680-4 Kawazu Iizuka-shi Fukuoka820-8502 Japan NEXT21 K.K 3-38-1 Hongo Bunkyo-ku Tokyo113-0033 Japan

Artificial bone implants are in relatively simple shapes for use mainly by cutting or manually. To produce a desired bone shape, we used tribasic calcium phosphate bone ash powder as the material and aqueous sodium chondroitin sulfate solution as the binder in inkjet powder-layered manufacturing. In experiments, we reproduced a rabbit femur with a precision of 0.6 mm and a minimum longitudinal hollow shaft 2 mm in diameter based on computed tomography data. We gave the brittle artificial bone a compressive strength of 3 MPa by dipping it in water and binder through its hydrate reaction. © Fuji technology Press Ltd.

关键词： Sulfur compounds

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Research on rough set theory and applications in China

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Lecture Notes in computer science

作者： Wang, Guoyin Zhang, Qinghua Huang, Houkuan Ye, Dongyi Hu, Qinghua Hu, Xuegang Shi, Zhongzhi Li, Yongli Shang, Lin An, Liping Sai, Ying Chen, Shanben Liang, Jiye Qin, Keyun Zeng, Huanglin Xie, Keming Miao, Duoqian Min, Fan Wu, Zhaocong Wu, Weizhi Dai, Jianhua Institute of Computer Science and Technology Chongqing University of Posts and Telecommunications Chongqing 400065 China School of Information Science and Technology Southwest Jiaotong University Chengdu 610031 China School of Computer and Information Technology Beijing Jiaotong University Beijing 100044 China College of Math. and Computer Fuzhou University Fuzhou 350002 China Harbin Institute of Technology PO Box 458 Harbin 150006 China School of Computer and Information Hefei University of Technology Hefei 230009 China Institute of Computing Technology Chinese Academy of Sciences Beijing 100080 China Lanzhou University No.222 Tianshui South Rd. Lanzhou 730000 China State Key Laboratory for Novel Software Technology Nanjing University Nanjing 210093 China Management Science and Engineering Department Business School Nankai University Tianjin 300071 China Shandong University of Finance No.40 Shun-geng Road Jinan 250014 China Welding Engineering Institute Shanghai Jiaotong University Shanghai 200030 China School of Computer and Information Technology Shanxi University Taiyuan 030006 China Intelligent Control Development Center Southwest Jiaotong University Chengdu 610031 China Artificial Intelligence of Key Laboratory Sichuan University of Science and Engineering Zigong 643000 China Department of Automation College of Information Engineering Taiyuan University of Technology Taiyuan 030024 China 4800 CaoAn Highway Shanghai 201804 China School of Computer Science and Technology University of Electronic Science and Technology of China Chengdu 610054 China School of Remote Sensing Information Engineering Wuhan University Wuhan 430079 China Institute for Information and System Sciences Faculty of Science Xi'an Jiaotong University Xi'an 710049 China Information College Zhejiang Ocean University Zhejiang 316004 China Institute of Artificial Intelligence Zhejiang University Hangzhou 310027 China

ISBN: (纸本)3540850635

This article gives a capsule view of research on rough set theory and applications ongoing at universities and laboratories in China. Included in this capsule view of rough set research is a brief description of the following things: Chinese research groups on rough set with their URLs for web pages, names of principal researchers (supervisors), numbers of graduate students, and topics being investigated. Statistical summaries showing the growth in the research on rough set theory and application in China are included. In addition, an introduction summarizing the research interests of Chinese researchers is included in this article. The contribution of this article is a complete overview of the principal research directions in rough set theory and its applications in China. © 2008 Springer-Verlag Berlin Heidelberg.

关键词： Rough set theory

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Wear characteristic of titanium using laser surface modification method

Keikinzoku Yosetsu/Journal of Light Metal Welding and Constr...

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Keikinzoku Yosetsu/Journal of Light Metal Welding and Construction 2007年第12期45卷 9-16页

作者： Yamaguchi, Tomiko Nishio, Kazumasa Era, Hidenori Katoh, Mitsuaki Department of Applied Science for Integrated System Engineering Graduate School of Engineering Kyushu Institute of Technology Department of Biological Functions and Engineering Graduate School of Life Science and Systems Engineering Kyushu Institute of Technology Department of Materials Science Faculty of Engineering Kyushu Institute of Technology

Laser surface modification method for pure titanium plate was performed using nitrogen gas as a shielding gas. The laser fusion layer obtained was investigated using the metallurgical analysis, a hardness test and an abrasion test. In the microstructure of the laser fusion layer, primary dendrite of TiN and eutectics composed of Ti and TiN were observed regardless of shielding gas flow rate. The Vickers hardness of the laser fusion layer increased with the increase in the shielding gas flow rate, and the laser fusion layer had the maximum Vickers hardness number of 1040 HV when a shielding gas flow rate was 40 L/min. As the abrasion property of the laser fusion layer in the shielding gas flow rate of 20 L/min was compared with that of the base metal TP270H, the wearing width of the laser fusion layer was decreased 50% below that of the base metal. In addition, the wear coefficient of the laser fusion layer became about 17% in comparison with that of the base metal.

关键词： Laser surface modification method Shielding gas Titanium Wear coefficient Wear resistance

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Contract-based impact analysis for weaving classes and aspects

Computer Software

引用

computer Software 2007年第2期24卷 133-149页

作者： Shinotsuka, Suguru Ubayashi, Naoyasu Shinomi, Hideaki Tamai, Tetsuo Graduate School of Computer Science and Systems Engineering Kyushu Institute of Technology Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology IBM Japan Ltd. Graduate School of Arts and Sciences University of Tokyo

Aspect-oriented programming (AOP) has the good characteristic called obliviousness that enables a programmer to design a class without considering crosscutting concerns. On the other hand, it is not necessarily easy for the programmer to know the overall behavior of a woven program because weaving modifies the behavior of a method denned in a class. Unexpected errors might be embedded in the woven program. To tackle this problem, we propose WbC (Weaving by Contract), a technique for verifying the correctness of weaving based on contracts. Contracts in WbC consist of pre-conditions, post-conditions, and invariants of weaving. By introducing WbC, we can specify how a program should behave before and after weaving. We also provide a language called COW (COntracl Writing language) for supporting WbC. In COW, a programmer describes contracts by predicate logic that represents the behavior of a program as a property of control and data flow. WbC can restrict weaving to keep the intention of the programmer.

关键词： Object oriented programming

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The fundamental experiment of prediction of material degradation for selective laser sintering

The fundamental experiment of prediction of material degrada...

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4th International Conference on Leading Edge Manufacturing in 21st Century, LEM 2007

作者： Fukumaru, Hirofumi Narahara, Hiroyuki Suzuki, Hiroshi Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology Japan

Shortening the product development time and reducing the cost have become very important issues in these days. The SLS technology contributes to these demands. In addition, the efficiency of material use is high, as SLS consumes only necessary amount of material. However, if it is not maintained properly, the material deterioration advances, finally, the recycled material causes a defective molding. In this case, we have to perform re-molding. This causes the delay of the development schedule. The prediction method of deterioration in the material for SLS should be discussed and studied. In this paper, fundamental experiment on the material degradation is conducted. The theoretical analysis of the degree of deterioration of material and the prediction method is discussed.

关键词： Sintering

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Statistical properties of superposed fractal speckle fields

Statistical properties of superposed fractal speckle fields

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Laser Optics 2006: Wavefront Transformation and Laser Beam Control

作者： Okamoto, Takashi Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology 680-4 Kawazu Iizuka Fukuoka 820-8502 Japan

ISBN: (纸本)0819467545

The correlation properties of fractal speckle distributions arising from superposition of three speckle waves propagating perpendicularly to one another are studied theoretically. The analytical expressions are derived for the intensity correlation of the superposed speckle fields, and the theoretical results are verified by means of computer simulations. It is shown that the spatial anisotropy of speckle patterns exists even when the three speckle waves are interfered with one another. This spatial anisotropy affects the power law distribution of intensity correlations for fractal speckles, leading to the speckle pattern which is not self-similar in two or three dimensions. As an application of the superposed speckle field, a method to fabricate a disordered medium by illuminating photopolymer with multiple laser speckle waves is proposed. Some preliminary experimental results are shown.

关键词： Speckle

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