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IEEE International Symposium on Electromagnetic Compatibility (EMC)

作者： Y. Toyota A.E. Engin Tae Hong Kim M. Swaminathan K. Uriu Department of Communication Network Engineering Okayama University Okayama Japan Packaging Research Center School of Electrical and Computer Engineering Georgia Institute of Technology USA Packaging Research Center School of Electrical and Computer Engineering Georgia Institute of Technology USA EMC Design Group System Engineering Center Matsushita Elecrric Indusrrial Company Limited Japan

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CTH13-6: Distributive High-Rate Space-Frequency Codes Achieving Full Cooperative and Multipath Diversities for Asynchronous Cooperative Communications

CTH13-6: Distributive High-Rate Space-Frequency Codes Achiev...

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IEEE Globecom 2006

作者： Yabo Li Wei Zhang Xiang-Gen Xia Department of Electrical and Computer Engineering CDMA system design group Nortel Networks University of Delaware Richardson TX USA Department of Electric & Electronic Engineering Clear Water Bay Kowloon Hong Kong University of Science and Technology Hong Kong China Department of Electrical and Computer Engineering University of Delaware Newark DE USA

Using OFDM and space-time coding to achieve asynchronous cooperative diversity has been proposed by Mei et. al. and Shin et al, where orthogonal space-time block codes, Alamouti code in particular, were used at relay nodes. This proposed space-time coding can not achieve the multipath diversity when the channels from nodes to nodes are frequency selective fading. In this paper, we also consider asynchronous cooperative communications where the channels are assumed to be frequency-selective fading. We design high rate distributed space-frequency codes to achieve both full asynchronous cooperative diversity and multipath diversities.

关键词： Relays OFDM Frequency synchronization Fading Delay Transceivers Block codes Frequency diversity Receiving antennas Costs

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A Compact Correlation Filter For On-Chip Learning in a Spiking Neural Network

A Compact Correlation Filter For On-Chip Learning in a Spiki...

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Midwest Symposium on Circuits and systems (MWSCAS)

作者： Jacob N. Allen Hoda S. Abdel-Aty-Zohdy Robert L. Ewing Microelectronics System Design Laboratory Department of Elect. and Computer Engineering Oakland University Rochester MI USA Member IEEE Information Directorate Air Force Research Labs Wright-Patterson Air Force Base Ohio 45433

A Hebbian learning algorithm based on proportion sampling is presented that can be used to implement on-chip learning for a binary spiking neural network. A correlation filter estimates when statistical independence has been obtained between subsequent samples. Simulation shows that the correlation filter reduces falsely learned connections in environments were inputs are randomly activated an average of 83% of the total time. A correlation filter for 255 binary samples is implemented using 21 gates and a surface area of .0008cm2 for a .5μ fabrication process. Compared to traditional neural networks, the spiking neural network learned an odor in a single epoch resulting in only a 7% error, while classical learning algorithms required multiple epochs and typically resulted in 30% error.

关键词： Filters Network-on-a-chip Neural networks Neurons Hebbian theory Working environment noise Microelectronics Sampling methods Active noise reduction Jacobian matrices

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Dynamic PECT Effect for Nanotransducers and Hybrid Devices

Dynamic PECT Effect for Nanotransducers and Hybrid Devices

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Midwest Symposium on Circuits and systems (MWSCAS)

作者： F. Lincoln Vogel Hoda S. Abdel-Aty-Zohdy Robert L. Ewing GraphiTech Inc. St. Clair Shores MI 48080-1567 Microelectronics System Design Laboratory Electrical and Computer Engineering Oakland University Rochester MI USA Information Directorate Air Force Research Laboratory OH USA

Recent advances in nanotechnology have opened the door to the use of hybrid devices in integrated system-on-a-chip. The Piezo Electrochemical Transducer (PECT) effect device uses nano-dimensioned graphite fibers, where the PECT effect can be effectively used to control current and voltage levels. The PECT effect, discovered (in early 1980's) and named by co-author F. L. Vogel, uses graphite fiber intercalated with sulfuric acid (H2SO4) to shrink parallel to the graphite planes (basal plane), whereas the reverse PECT effect causes the graphite fiber to expand. The reverse PECT effect appears by reversing the direction of the electrolysis current. This paper explores the physical properties of PECT and its applications to developing novel solid-state hybrid devices, including new kinds of transducers and transistors based on graphite that will have a significant impact on future bio-inspired integrated circuits and nano-technology.

关键词： Nanoscale devices Optical fiber devices Transducers Nanotechnology system-on-a-chip Voltage control Electrochemical processes Solid state circuits Application specific integrated circuits Hybrid integrated circuits

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Special section on VLSI design and CAD algorithms

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IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND computer SCIENCES 2006年第12期E89A卷 3377-3377页

作者： Onodera, Hidetoshi Department of Communications and Computer Engineering Graduate School of Informatics Kyoto University Japan SIG-SLDM (System LSI Design Methodology) IPSJ Japan Univ. of Tokyo Japan Kyushu Univ. Japan Tokyo Inst. of Tech. Japan Kyushu Inst. of Tech. Japan JAIST Japan Kobe Univ. Japan Waseda Univ. Japan Kumamoto Univ. Japan Sanyo Japan Fujitsu Lab. Hong Kong Gunma Univ. Japan Nagoya Univ. Japan Osaka Univ. Japan NEC Tokyo Metropolitan Univ. Japan Hokkaido Univ. Japan Matsushita Japan Toshiba Microelectronics Japan Univ. of Shizuoka Japan Hitachi Japan

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design and optimization on dynamic power system for self-powered integrated wireless sensing nodes

Design and optimization on dynamic power system for self-pow...

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2005 International Symposium on Low Power Electronics and design

作者： Ma, Dongsheng Wang, Janet M. Somasundaram, Mohankumar N. Hu, Zongqi Integrated System Design Laboratory Electrical and Computer Engineering Department University of Arizona Tucson AZ 85721 United States Digital VLSI Design Laboratory Electrical and Computer Engineering Department University of Arizona Tucson AZ 85721 United States

This paper presents an integrated power system for low-power wireless sensor networks with dynamic efficiency optimization technique. By adaptively resizing power transistors and adjusting switching frequency, system efficiency is enhanced significantly. Theoretical analysis is elaborated to support the proposed technique. A prototype integrated power system for self-powered photovoltaic wireless sensing node was designed and simulated with TSMC 0.35μm CMOS process. With a power range of 0.5μW to 10mW, power efficiency stays above 71%. Tolerance between theoretical and simulated optimal power transistor sizes is less than 6.7%, while that of optimal switching frequencies is less than 5%. The paper gives another solution to minimizing system power in the perspective of power processing. Copyright 2005 ACM.

关键词： Power electronics

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Backward inference in Bayesian networks for distributed systems management

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Journal of Network and systems Management 2005年第4期13卷 409-427页

作者： Ding, Jianguo Krämer, Bernd Bai, Yingcai Chen, Hansheng Software Engineering Institute East China Normal University Shanghai 200062 China Department of Electrical Engineering and Information Engineering FernUniversität Hagen Germany Department of Computer Science and Engineering Shanghai Jiao Tong University Shanghai China East-china Institute of Computer Technology Shanghai China IEEE FernUniversität Hagen Germany International Society for Process and Design Sciences Shanghai Jiao Tong University China Shanghai Engineering Center of GOLDEN Network Shanghai Computer Open System Association East-China Institute of Computer Technology

The growing complexity of distributed systems in terms of hardware components, operating system, communication and application software and the huge amount of dependencies among them have caused an increase in demand for distributed management systems. An efficient distributed management system needs to work effectively even in face of incomplete management information, uncertain situations, and dynamic changes. In this paper, Bayesian networks are proposed to model dependencies between managed objects in distributed systems. The strongest dependency route (SDR) algorithm is developed for backward inference in Bayesian networks. The SDR algorithm can track the strongest causes and trace the strongest routes between particular effects and its causes, the strongest dependency of causes can be also achieved by the algorithm. Thus, the backward inference provides an efficient mechanism in fault locating, and is beneficial for performance management. © 2005 Springer Science+Business Media, Inc.

关键词： computer networks

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A pseudo-differential current-mode interface with point-to-point cascade bus architecture(WiseBus™) for large panel LCD systems

A pseudo-differential current-mode interface with point-to-p...

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2005 Symposium on VLSI Circuits

作者： Chang, Il Kwon Jeon, Yong Weon Lee, Jang Sub Hong, Jong Hoon Kim, Jin Tae Choi, Chang Sik Kim, Suki Advanced DDI Design System LSI Samsung Electronics Yongin-city Gyeonggi-do Korea Republic of Department of Electronics and Computer Engineering Korea University Korea Republic of

ISBN: (纸本)490078401X

A new point-to-point cascade bus architecture and pseudo-differential current signaling present, which is called WiseBus™. The proposed transmitter using capacitive coupling error cancellation and fast cut-off scheme compensates an inherent charge error and duty error of output current. The receiver makes high common noise rejection between reference and data using perfectly matched gain-enhanced regulated cascode buffer. The advantage of proposed interface is very low power consumption and low EMI using small current signal(±100μA) and small signal loop area, and it is suitable for large size LCD TV due to point-to-point cascade bus configuration.

关键词： Cascade connections

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Dynamic segmentation of small image windows for visual servoing

Dynamic segmentation of small image windows for visual servo...

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IEEE International Conference on Mechatronics and Automation

作者： P. Siva C.C.W. Hulls System Design Engineering University of Waterloo Waterloo ONT Canada Electrical and Computer Engineering University of Waterloo Waterloo ONT Canada

Processing of image windows rather than complete images is useful for robots incorporating visual servoing as high image processing rates are required. Each image window is segmented, often by thresholding, to identify features of interest. To adapt to changing conditions and to achieve the thresholding of low contrast and shadowed windows, a sophisticated method for performing dynamic segmentation is required. Segmentation methods from the pattern recognition and optical character recognition fields were studied to determine their effectiveness at thresholding 32 by 32 pixel image windows of circular hole features. The segmentation technique must be capable of preserving the centroid location with sub-pixel accuracy. To this end a new morphological preprocessing method is introduced to improve the performance of most thresholding algorithms. It was found that this new preprocessing method was able to improve the centroid location error by nearly 40% when Yasuda's thresholding algorithm was used. The preprocessing algorithm in combination with Yasuda's thresholding algorithm was able to segment the holes with an average centroid location error of 0.423 pixels and a standard deviation of 0.328 pixels.

关键词： Image segmentation Visual servoing Mechatronics Automation

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Non-contact prediction of soil moisture profiles using radio wave reflection

Non-contact prediction of soil moisture profiles using radio...

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2005 ASAE Annual International Meeting

作者： Needham, Duane L. Weckler, Paul R. Bunting, Charles F. Stone, Marvin L. Control System Design Consultant 310 N. Civic Drive # 405 Walnut Creek CA 94596 United States Biosystems and Ag Engineering Dept. Oklahoma State University Stillwater OK 74078 United States Electrical and Computer Engineering Dept. Oklahoma State University Stillwater OK 74078 United States

This work investigated the potential for the non-contact measurement of volumetric soil moisture profiles by detecting reflected VHF and UHF radio waves. The investigation included the development of an instrumentation system to measure radio wave reflection coefficients, a calibration routine for such a system, a model for simulating electromagnetic reflections from layered dielectric media, and an algorithm devised to resolve layers of moisture from radio wave reflections of multiple frequencies. Field trials of the system were conducted in which measured reflection coefficients were compared with simulated results, and predicted moisture gradients were compared with actual moisture profiles. The model that simulated reflection coefficients in the frequency range of 80 MHz to 1 GHz was tested using hypothetical and existent moisture profiles. Results of simulated profiles indicated that reflection coefficients could be used to distinguish between volumetric surface moisture and could detect subsurface moisture to a depth of 45.7 cm. Reflection measurements made in the field trials indicated that linear correlation could be made with volumetric moisture in the top 15.2 cm. The profile restoration algorithm closely predicted simulated near-surface moisture but had a high failure rate predicting deep subsurface moisture. Results of the study indicated that reflection coefficients could be used to detect soil moisture at depth, but the restoration algorithm did not effectively resolve moisture layers.

关键词： Soil moisture

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