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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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Properties of a room temperature terahertz detection array

Properties of a room temperature terahertz detection array

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International Conference on Infrared and Millimeter Waves

作者： T.O. Klaassen A.J.L. Adam I. Kasalynas J.N. Hovenier G. Pandraud V.P. Iordanov P.M. Sarro Kavli Institute of NanoScience Delft Delft University of Technnology Delft Netherlands Electronic Instrumentation Laboratory Department of Microelectronics Faculty of Electrical Engineering Mathematics and Computer Science Delft University of Technnology Delft Netherlands Health Care Devices and Instrumentation Philips Research Eindhoven Netherlands Delft Institute of Microelectronics and Submicron Technology DIMES Electronic Components Technology and Materials Laboratory Delft University of Technnology Delft Netherlands

An 8/spl times/8 pixel array has been designed and fabricated for broadband THz detection. Each pixel consists of a 500/spl times/500 /spl mu/m thin film absorber on a SiN membrane with thermopile temperature readout. The expected performances - NEP = 4.10/sup -9/ W/Hz/sup 1/2/ and 10 ms response time - were compared with test results.

关键词： Materials science and technology Detectors Temperature sensors Absorption Instruments Silicon compounds Biomembranes Pyroelectricity CMOS technology Semiconductor films

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Electron‐phonon Interaction in Si Quantum Dots Interconnected with Thin Oxide Layers

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AIP Conference Proceedings 2005年第1期772卷 797-798页

作者： Shigeyasu Uno Nobuya Mori Kazuo Nakazato Nobuyoshi Koshida Hiroshi Mizuta *Hitachi Cambridge Laboratory Hitachi Europe Ltd. Madingley Road Cambridge CB3 0HE United Kingdom †CREST JST Shibuya TK Bldg. 3‐13‐11 Shibuya Shibuya‐ku Tokyo 150‐0002 Japan **Department of Electronic Engineering Osaka University 2‐1 Yamada‐oka Suita Osaka 565‐0871 Japan ‡Department of Electrical Engineering and Computer Science Graduate School of Engineering Nagoya University Furo‐cho Chikusa‐ku Nagoya 464‐8603 Japan §Division of Electronic and Information Engineering Faculty of Technology Tokyo University of Agriculture and Technology Tokyo 184 Japan ¶Department of Physical Electronics Tokyo Institute of Technology 2‐12‐1 O‐okayama Meguro‐ku Tokyo 152‐8552 Japan

The electron‐phonon interaction in one‐dimensional array of Si dots interconnected with oxide layers is theoretically examined. The folded electron/phonon energy dispersion relations and rigorous phonon normal mode calculation are incorporated. The acoustic deformation potential scattering is weakened due to the strain absorption by the oxide layers. Electron energy loss is strongly suppressed near the bottom of a miniband due to restriction of high‐energy phonon emission.

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Enhancement of stents using interference of low-frequency ultrasonic echo signals

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Journal of Medical Ultrasonics 2004年第2期31卷 67-73页

作者： Ohashi, Gosuke Ohya, Akihisa Tobise, Kazimobu Akiyama, Iwaki Faculty of Engineering Shizuoka University Hamamatsu Japan Institute of Information Sciences and Electronics University of Tsukuba Tsukuba Japan Shoryo Electronic Corporation Kamakura Japan Faculty of Engineering Shonan Institute of Technology Fujisawa Japan Image Processing and Vision Research Laboratory Department of Electrical and Computer Engineering University of California at Santa Barbara Santa Barbara CA 93106-9560 United States

Purpose. We set out to enhance the imaging of stents used for coronary coarctation surgery without imaging the reticulation of the stent. Because the stent is a reticulated structure, there is a relation between ultrasound wavelength and the interstice reticulation that produces the echo. Methods. First we performed computer simulation by ultrasound frequency of transmitted signals to analyze this relation. Then, instead of controlling the transmitted wave, we processed the returned signals through a band-pass filter because of the difficulty of controlling the transmitted waves of diagnostic ultrasound equipment. Following this, we conducted experiments on an agar gel phantom containing a stent to verify the effectiveness of this method. Results. The simulation confirmed that the stent was apparent when the ultrasonic wavelength equaled the product of an integer and twice the interval of the reticulation of the stent. Application of a band-pass filter of 0.8 to 1.5MHz to the waveform returned from the agar gel phantom containing the stent. Conclusions. The effectiveness of this method in depicting the stent was confirmed. © The Japan Society of Ultrasonics in Medicine 2004.

关键词： Interference Received waveform Signal processing Stent Ultrasonic echography

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Synchronization of chaotic systems via hybrid impulsive and switching control

Synchronization of chaotic systems via hybrid impulsive and ...

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Asian Control Conference

作者： Zhi-Hong Guan D.J. Hill Xuemin Shen Xinghuo Yu Department Control Science & Engineering Huazhong University of Science and Technology Wuhan China Department Electronic Engineering City University of Hong Kong Hong Kong China Department Electrical & Computer Engineering University of Waterloo ONT Canada Faculty of Engineering Royal Melbourne Institute of Technology Melbourne VIC Australia

In this paper, a new hybrid impulsive and switching control strategy for chaos synchronization is developed. Using switched Lyapunov functions, several new criteria for exponential stability and asymptotical stability of hybrid impulsive and switching nonlinear systems are established and, particularly, some simple sufficient conditions for driving the synchronization error to zero are proposed. A typical example, the Chua's chaotic circuit, is given for illustrating and visualizing the theoretical results.

关键词： Chaos Control systems Chaotic communication Circuit stability Stability criteria Asymptotic stability Nonlinear systems Visualization Cities and towns Lyapunov method

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A further study of nonlinear feedback system with chaotic oscillation

A further study of nonlinear feedback system with chaotic os...

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World Congress on Intelligent Control and Automation (WCICA)

作者： Fengling Han Xinghuo Yu Yong Feng Guanrong Chen School of Electrical and Computer Engineering Royal Melbourne Institute of Technology Melbourne VIC Australia Faculty of Informatics and Communication Central Queensland University Rockhampton QLD Australia Department of Electrical Engineering Harbin Institute of Technology China Department of Electronic Engineering City University of Hong Kong Hong Kong China

ISBN: (纸本)0780382730

This paper studies a simple nonlinear feedback system that consists of a relay-hysteresis in feedback with a linear continuous-time unstable second-order system. With suitable parameters and initial conditions, the system can create chaos. The analytic solutions on occurrence chaos and the criterion for maximum stability margin of chaos are presented.

关键词： Feedback Chaos Chaotic communication Hysteresis Relays Limit-cycles Australia Circuit stability Oscillators Piecewise linear techniques

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Toward asymmetric multi-layer for distributed monitoring

Toward asymmetric multi-layer for distributed monitoring

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IEEE TENCON 2004 - 2004 IEEE Region 10 Conference: Analog and Digital Techniques in Electrical engineering

作者： Chaiprapa, Prawat Uatrongjit, Sermsak Kantapanit, Kajornsak Jumnongthai, Kosin Dept. of Electrical Engineering Chiang Mai University 239 Huay Kaew Road Muang Distric Chiang Mai 50200 Thailand Dept. of Computer Engineering North Chiang Mai University Hang Dong-Chiang Mai Road Hang Dong Chiang Mai Thailand Electronic and Telecommunication Engineer Dept. Faculty of Engineer King Mongkut's University of Technology Thonburi 91 pracha-uthit Rd. Bangmod Tungkru Bangkok 10400 Thailand

Traditional centralized management solutions do not scale to present-day large-scale computer/communication networks. They suffer from certain other drawbacks too: a single point of failure and hence lack of fault tolerance, and heavy communication costs associated with the central manager. It has been recognized the decentralization/distributed solutions can solve some of the problems associated with centralized solutions [1]. Recently, a new theoretical multi-level paradigm called ML-ADSD [2] assumes that all nodes in the same cluster are symmetric for multi-level adaptive distributed diagnosis algorithms for fully connected network which is not true and cannot be realized in the real life. In this paper, we propose a new algorithm called Asymmetric multi-level adaptive distributed diagnosis algorithms, AML-ADSD. In this new algorithm, each node parameters are to be classified using a standard benchmark program. Then, each node performances can be calculated. © 2004IEEE.

关键词： Distributed computer systems

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Transient stability fuzzy control approach for power systems

Transient stability fuzzy control approach for power systems

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IEEE International Conference on Industrial technology (ICIT)

作者： T. Guesmi H.H. Adballah A. Toumi Faculty of Automation Guangdong University of Technology Guangzhou Guangdong China Institute of Computer Science at FORTH Crete Heraklion Greece Faculty of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan Hubei China N. Papanikolaou & Associates STEP-C FORTH Crete Heraklion Greece

Power system angle stability can be improved by a wide variety of controls. Some methods have been used effectively for many years, both at generating plants and in transmission network. In this paper, two methods are proposed to improve control stability. The first consists to find the critical clearing time (CCT) by equal area stability criterion and numerical integration. The second interests to fuzzy logic controllers. For this last method, we present the nonlinear model with a Takagi-Sugeno fuzzy model. Then a model-based in fuzzy controller design utilizing the concept of the so-called "parallel distributed compensation" (PDC) is employed. Stability analysis and control design problems can be reduced to linear matrix inequality (LMI) problems. Therefore, they can be solved efficiently in practice by convex programming techniques for LMI's. A single machine infinite bus system is analysed with the proposed methods.

关键词： Power system transients Power system stability Fuzzy control Power system control Power systems Control systems Stability criteria Numerical stability Fuzzy logic Takagi-Sugeno model

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The asymmetric multi-layer for distributed fault detection in networks with unreliable processors

The asymmetric multi-layer for distributed fault detection i...

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International Symposium on Communications and Information Technologies (ISCIT)

作者： P. Chaiprapa S. Uatrongjit K. Kantapanit K. Jumnongthai Department of Electrical Engineering Chiang Mai University Chiang Mai Thailand Department of Computer Engineering North Central College Chiang Mai Thailand Electronic and Telecommunication Engineer Department Faculty of Engineer King Mongkut's University of Technology Bangkok Thailand

Traditional centralized management solutions do not scale to present-day large-scale computer/communication networks. They suffer from certain other drawbacks too: a single point of failure and hence lack of fault tolerance, and heavy communication costs associated with the central manager. It has been recognized that the decentralization/distributed solutions can solve some of the problems associated with centralized solutions. A new theoretical multi-level paradigm called ML-ADSD (Thulasraman et al. (2003)) assumes that all nodes in the same cluster are symmetric for multi-level adaptive distributed diagnosis algorithms for fully connected networks which is not true and cannot be realized in real life. In this paper, we propose a new algorithm called asymmetric multi-level adaptive distributed diagnosis algorithms, AML-ADSD. In this new algorithm, node parameters are to be classified using a standard benchmark program. Then, each node's performance can be calculated.

关键词： Fault detection Intelligent networks Monitoring Testing Clustering algorithms Electrical fault detection electronic mail computer networks Telecommunication computing Risk management

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Bounding Approach to Parameter Estimation without Priori Knowledge on Model Structure Error

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IFAC Proceedings Volumes 2004年第11期37卷 221-226页

作者： Tao Chang Kazimierz Duzinkiewicz Mietek Brdys Department of Electronic Electrical and Computer Engineering The University of Birmingham Birmingham B15 2TT UK Fax: +44 121 414 4291. Department of Control Engineering Faculty of Electrical Engineering and Automatic Control Gdansk University of Technology ul. G.Namtowicza 11 12 80-952 Gdansk Poland.

Parameter estimation of an autoregressive movmg average (ARMA) model is discussed in this paper by using bounding approach. Bounds on the model structure error are assumed unknown, or known but conservative. To reduce this conservatism, a point-parametric model concept is proposed, where there exist a set of model parameters and structure error corresponding to each input. Feasible parameter sets are defined for point-parametric model. Bounded values on the model parameters and structure error can then be computed jointly by tightening the feasible set using observations under deliberately designed input excitations. Finally, a constantly bounded parameter model is established, which can be used for robust control.

关键词： modelling errors bounding method parameter estimation uncertain dynamic systems robust control

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