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A method of affine transformation for rectangular video image

systems and computers in Japan 2000年第7期31卷 75-85页

作者： Hiroto Kagotani Yoichiro Sato Yoshimichi Takahara Takuji Okamoto Faculty of Engineering Okayama University Okayama Japan 700 Faculty of Computer Science and System Engineering Okayama Prefectural University Soja Japan 719-11 Industrial Technology Center of Okayama Prefecture Okayama Japan 701-12 Faculty of Engineering Okayama University Okayama Japan 700

This paper proposes the 1-affine transformation for rectangular video images. In the proposed method, each frame of the input rectangular video images is partitioned into small square subimages, which are stored separately in memory. Then, by applying the 90° rotation and the one-dimensional geometrical transformations alternately for two times each, the affine transformation is realized. The affine transformer based on this principle is realized by two kinds of functional modules corresponding to the 90° rotation and the one-dimensional geometrical transformation, respectively. The block diagram for the affine transformation is shown combining those functional modules. Calculation of the adequate size for the subimage, as well as the reduction of the memory speed requirement by the partitioning, are discussed. The proposed method can easily be applied to video images with different sizes only by modifying the combination of the two kinds of functional modules. © 2000 Scripta Technica, Syst Comp Jpn, 31(7): 75–85, 2000

关键词： affine transformation rectangular video images image partitioning functional module general‐purpose DRAM

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Cellular neural networks considering hysteresis characteristic

Cellular neural networks considering hysteresis characterist...

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IEEE Asia-Pacific Conference on Circuits and systems

作者： M. Namba H. Kawabata A. Kanagawa Z. Zhang Faculty of computer science and system engineering Okayama Prefectural University Okayama Japan Industrial Technology Center of Okayama Okayama Japan

The Cellular Neural Network (CNN) has been widely used for associative memory, but has a problem called indeterminate cell. In this paper, we have proposed a CNN considering hysteresis characteristic as one of the met... 详细信息

ISBN: (纸本)0780362535

关键词： Cellular neural networks Hysteresis computer science systems engineering and theory computer industry Associative memory Circuit simulation Analog circuits Differential equations Programmable control

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Impulse Response Model Identification in the Case of a Multi-Period ZOH Input

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IFAC Proceedings Volumes 2000年第15期33卷 295-300页

作者： Zi-Jiang Yang Yoshihiro Kodama Faculty of Computer Engineering and System Science Kyushu Institute of Technology Iizuka Fukuoka 820-8502 Japan TEL+81-948-29-7672 FAX+81-948-29-7651

This paper considers the problem of impulse response identification for a linear sampled-data system where the input signal is held constantly within a multiple of the sampling period of the output signal. To improve identification accuracy, this paper proposes a new identification approach by employing the Haar scaling and wavelet functions. At first, we point out that the discrete-time impulse response of a linear system with zero-order hold (ZOH) input is actually the piecewise-constant approximation of the continuous-time impulse response. Based on the close relation between piecewise-constant approximation with Haar scaling and wavelet functions, a hierarchical identification procedure is proposed which identifies the system impulse response from a coarse resolution level to a fine resolution level successively. At each resolution level, the BIC is utilized to determine the length of the decomposed impulse response in the corresponding subspace, so that some redundant parameters in the high frequency-domain which are sensitive to the noise effects are discarded. Since the identified impulse response model is not smooth when it is represented by some Haar scaling functions of different widths, we can replace each Haar scaling function in the preidentified impulse response model by a Gaussian basis function with corresponding position and width. Then an improved identification method is also proposed to achieve smooth continuous-time impulse response model from sampled data. It is shown through simulation study that the proposed methods yield accurate estimate of the impulse response even in the ill-conditioned cases.

关键词： identification impulse response ill-conditioned problem multiresolution analysis Haar wavelet multirate sampling

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A Genetic Algorithm Approach to Identification of Nonlinear Polynomial Models

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IFAC Proceedings Volumes 2000年第15期33卷 793-798页

作者： Zi-Jiang Yang Tadasuke Fujimoto Katsumi Kumamaru Faculty of Computer Engineering and System Science Kyushu Institute of Technology Iizuka Fukuoka 820-8502 Japan. TEL+81-948-29-7672 FAX+81-948-29-7651

In the last two decades, linear-in-parameter nonlinear polynomial models for NARX (Nonlinear Auto-Regressive with eXogenous input) systems have received considerable attention. The keypoint of polynomial model identification is how to select a set of significant terms employed to approximate the NARX system under study, from a large number of candidates. To this end, the orthogonal least-squares method which is a local search procedure, and the genetic algorithm approach which has a high potential for global optimization have been proposed in the literature. However, it is considered that the methods reported so far in the literature still lack potential to identify the polynomial models with relatively high-order. This limits the applicability of the polynomial models to the real complex nonlinear systems. Motivated by this fact, in this paper, a new genetic algorithm approach to polynomial model identification is proposed. Our contribution in this paper is to introduce a novel hierarchical encoding technique which is considered to be suitable to the structure of the polynomial models. Simulation and application results are also included to verify the efficiency of the proposed identification algorithm.

关键词： NARX system nonlinear polynomial model genetic algorithm system identification structure determination least-squares method

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Cellular Neural Networks Considering Hysteresis Characteristic

Cellular Neural Networks Considering Hysteresis Characterist...

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Electronic Communication systems--The 2000 IEEE Asia-Pacific Conference on Circuits and systems

作者： M.Namba H.Kawabata A.Kanagawa Z.Zhang Faculty of computer science and system engineering Okayama Prefectural University 111 KubokiSojaOkayama 719-1197Japan Industrial Technology Center of Okayama Prefecture 5301 Haga Okayama 701-1296Japan

＜正＞Cellular Neural Network has been widely used for associative memory,but has a problem called indeterminate *** this paper,we have proposed CNN considering hysteresis characteristic as one of the methods to avoid...

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High sensitivity isotope concentration-ratio measurement CO/sub 2/ infrared laser system. II

High sensitivity isotope concentration-ratio measurement CO/...

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International Conference on Infrared and Millimeter Waves

作者： T. Matsushima J. Kawanabe H. Maekawa S. Saimi T. Sueta Y. Cho Nara National College of Technology Yamato-Koriyama Nara Japan Aloka Company Limited Ome Japan Setsunan University Neyagawa Japan Faculty of Computer Science and System Engineering Okayama Prefectural University Soja Okayama Japan

For high sensitivity measurements of isotope concentration-ratios of trace-level gas mixture, particularly including carbon dioxide isotopes, we tested a /sup 12/CO/sub 2/-/sup 13/CO/sub 2/ composite laser system containing intracavity absorption cells. Sensitivity enhancement obtainable by the intracavity absorption cell configuration is examined theoretically. /sup 13/CO/sub 2/ in atmospheric air is readily detected and minimum detectable concentration by the present system was estimated to be 70 ppb.

关键词： Isotopes Geologic measurements Carbon dioxide Gas lasers Laser tuning Gas detectors Particle measurements Laser theory Electromagnetic wave absorption Chemical industry

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Exact location of the Steiner point of the three-point Steiner minimum tree in λ-geometry

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Electronics and Communications in Japan (Part III: Fundamental Electronic science) 2000年第2期84卷

作者： Michiyoshi Hayase Faculty of Computer Science and System Engineering Okayama Prefectural University Okayama Japan 719-1197

The exact location of the Steiner point in the Steiner minimum tree (SMT) for three given points in the λ-geometry plane is shown. SMTs are important to layout of LSIs and printed boards in rectilinear geometry and to constructing networks with shortest paths in Euclidean geometry. The λ-geometry that is introduced to fill the gap between the two geometries allows only orientations with angles ( iπ /λ) for all i , where i and λ (λ ⩾ 2) are integers. First, the exact location of the Steiner point is determined for three-point SMT. Surprisingly, when λ ≡ 0 (mod 3) there are infinite candidate points of the Steiner point. Next, two conditions for the locations of the three points are determined for the SMT whose total length of edges is shorter than that of the corresponding minimum spanning tree (MST), and is equal to that of the corresponding MST. © 2000 Scripta Technica, Electron Comm Jpn Pt 3, 84(2): 84–94, 2001

关键词： Steiner minimal tree λ-geometry computer-aided design network

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Algorithm for Three-Step Estimation of Transfer Function with Unknown Delay Steps and Order

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IFAC Proceedings Volumes 2000年第15期33卷 373-378页

作者： Mitsuki Mashino Fujio Ohkawa Kazushi Nakano Masayoshi Tomizuka Mechanics & Electronics Research Institute Fvkuoka Industrial Technology Center 3-6-1 Norimatsu Yahatanishi-ku Kitakyushu 807-0831 JAPAN Dept. of Control Engineering and Science Faculty of Computer & System Engineering Kyushu Institute of Technology Kawazu Iizuka 820-8502 JAPAN Dept. of Electronic Engineering The University of Electro- Communicatons 1-5-1 Chofu-ga-oka Chofu Tokyo 182-8585 JAPAN Dept. of Mechanical Engineering University of California at Berkeley 5100 B Etcheverry Hall Berkeley CA 94720-1740 USA

This paper deals with the estimation of an unknown process transfer function in the presence of colored measurement noise. A three-step estimation procedure has been previously developed for transfer functions, the delay steps and the orders of which are known in advance. The procedure is extended to deal with transfer functions with unknown delay steps and orders. The auto-correlation function of the error between the process output and model output is utilized for evaluating the model fitness. The effectiveness of the proposed method is demonstrated by a simulation study using a sample set of data in MATLAB.

关键词： colored noise I/O correlation information BCLS estimates parameter transformation MSE

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HIGH SENSITIVITY ISOTOPE CONCENTRATION-RATIO MEASUREMENT CO2 INFRARED LASER system（Ⅱ）

HIGH SENSITIVITY ISOTOPE CONCENTRATION-RATIO MEASUREMENT CO2...

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2000 25～(th) International Conference on Infrared and Millimeter Waves Conference Digest

作者： Tomoshi Matsushima Jun-ichi Kawanabe Hiroshi Maekawa Shohei Saimi Tadasi Sueta Yoshio Cho Nara National College of Technology 22 Yata-cho Yamato-Koriyama Nara 369-1080 Japan Aloka Co. Ltd. 19 Imai 3-7 Oume-shi 198-0023 Japan Aloka Co. Ltd. 19 Imai 3-7 Oume-shi 198-0023 Japan Aloka Co. Ltd. 19 Imai 3-7 Oume-shi 198-0023 Japan Setsunan University 8 Ikeda-Nakamachi 17 Neyagawa-shi 572-8505 Japan Faculty of Computer Science and System Engineering Okayama Prefectural University 111 Kuboki Soja Okayama 719-1197 Japan

For high sensitivity measurements of isotope concentration-ratios of trace-level gas mixture,particulaly including carbon dioxide isotopes,we tested a CO-CO composite laser system containingintracavity absorption *** enhancement obtainable by the intracavity absorption cellconfiguration is examined *** in atmospheric air is readily detected and minimumdetectable concentration by the present system was estimated to be 70 *** isotopes,we tested a CO-CO composite laser system containingintracavity absorption *** enhancement obtainable by the intracavity absorption cellconfiguration is examined *** in atmospheric air is readily detected and minimumdetectable concentration by the present system was estimated to be 70 ppb.

关键词： HIGH SENSITIVITY ISOTOPE CONCENTRATION-RATIO MEASUREMENT CO2 INFRARED LASER system

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The influence of class discretization to attribute hierarchy of decision trees

The influence of class discretization to attribute hierarchy...

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15th Congress on Medical Informatics Europe, MIE 1999

作者： Babič, Špela Hleb Kokol, Peter Zorman, Milan Podgorelec, Vili Faculty of Electrical Engineering and Computer Science University of Maribor Laboratory for System Design Smetanova 17 2000 Maribor Slovenia

ISBN: (纸本)0967335515

Decision support systems that help physicians are becoming very important part of medical decision making. They are based on different models and the best of them are providing an explanation together with an accurate, reliable and quick response. One of the most viable among decision-making models is the concept of decision trees, already successfully used for many medical decision making purposes. Although effective and reliable, the traditional decision tree construction approach still contains several deficiencies. Therefore we decided to develop and compare several decision supporting models, each of them built with different discretization of attributes and decision classes. For the construction of decision trees we used MtDeciT, in our laboratory developed tool for building decision trees using the classical induction method. All solutions were evolved for determining the influence of basic properties of child and his/her parents to length of successful breastfeeding. A comparison between developed models and obtained results has shown that the way of discretization obviously plays a great role in the reliable and accurate real-world medical decision making.

关键词： Decision trees

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