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Seminar on Neural Network Applications in Electrical engineering

作者： Georgi M. Dimirovski Yuanwei Jing Yanxin Zhang Miomir K. Vukobratovic Faculty of Electrical Engineering SS Cyril and Methodius University Skopje Macedonia Department of Computer Engineering Dogus University Kadikoy Istanbul Turkey School of Information Science and Engineering Northeastern University Shenyang China Laboratory of Robotics & Flexible Automation Mihajlo Pupin Institute Belgrade Serbia

A new robust adaptive control design synthesis, which employs both high-order neural networks and math-analytical results, for a class of complex nonlinear mechatronic systems possessing similarity property has been derived. This approach makes an adequate use of the structural feature of composite similarity systems and neural networks to resolve the representation issue of uncertainty interconnections and subsystem gains by on-line updating the weights. This synthesis does guarantee the real stability in closed-loop but requires skills to obtain larger attraction domains. Mechatronic example of an axis-tray drive system, possessing uncertainties, is used to illustrate the proposed technique

关键词： Robust control Adaptive control Emulation Network synthesis Neural networks Mechatronics Uncertainty Artificial neural networks Control system synthesis Stability

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Research on a Throwing Multidimensional Force Sensing system for Advanced Training of Shot-Put Athletes

Research on a Throwing Multidimensional Force Sensing System...

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International Conference on Information and Automation (ICIA)

作者： Zhen Gao Quanjun Song Ming Liu Jianhe Lei Yong Yu Yunjian Ge State Key laboratory of Robot Sensing System Institute of Intelligent Machines Chinese Academy and Sciences Hefei Anhui China Department of Electrical and Computer Systems Engineering Monash University Melbourne VIC Australia

In this paper, we develop a novel digital-shot system for sensing the throwing force information of shot-put athletes in real time. The digital-shot has been designed and manufactured with the same external dimensions and weight as the normal shot for open females. The three axes integrated accelerometer, as a crucial device in the force sensing system, can acquire the kinetics data along three orthogonal directions with reasonably high accuracy. By using the method of wavelet transformation, the characteristics of acceleration signals during the shot-put period can be extracted. Artificial neural network is adopted to recognise the movement pattern in different phases of shot throwing. For supplying more effective training instruction, with the help of six axes ground reaction force measuring apparatus, high-speed photography and surface electromyographic signal remote measuring device etc, an integrated platform of shot-put athlete biomechanical information acquisition is constructed. Based on the fusion of multi-targets and multi-parameters information, the shot-put athletes coaching system is proposed, which not only can supply constructive guidance for athletes to improve their skills, but also provide a new research platform of motion human modeling.

关键词： Multidimensional systems Force measurement Real time systems Manufacturing Accelerometers Kinetic theory Acceleration Data mining Artificial neural networks Pattern recognition

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Italian-Croatian Remote laboratory Distributed on Geographical Network

Italian-Croatian Remote Laboratory Distributed on Geographic...

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International Conference on Software, Telecommunications and computer Networks (SoftCOM)

作者： Mladen Borsic Drago Cmuk Pasquale Daponte Claudio De Capua Domenico Grimaldi Tomislav Kilic Tarik Mutapcic Maria Riccio Faculty of Electrical Engineering and Computing Zagreb Croatia Department of Engineering University of Sannio Benevento Italy Dipartimento Informatica Matematica Elettronica e Trasporti University E2809CMediterraneaE2809D Reggio Calabria Italy Department of Electronics Computer and System Science University of Calabria Rende Cosenza Italy Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture University of Split FESB Split Croatia Tarmel d. o. o Zagreb Croatia Didagroup S.p.A. San Giorgio del Sannio Italy

The paper presents the e-learning project and the work until now developed for extending the features of the Italian remote laboratory "G. Savastano" to the academic circles of East Europe, Western Balkan and Mediterranean area. In particular, in the framework of the project "Italian-Croatian remote laboratory distributed on geographic network", the Italian-Croatian collaboration is highlighted. The proposed approach follows EU efforts to implement internal lifelong learning program and influence educational systems of EU partners and neighbor Countries while helping them to overcome problems with their own educational systems and lack of resources. Developed experiments, included in the remote laboratory, give the possibility of achieving practical experience on several fields, while multilingual approach gives the access to such facility to the students coming from different countries. Moreover, the idea of interactively controlled transfer of knowledge and experience offers new opportunities to the remote experiments enabling them to be executed without supervising necessity

关键词： Remote laboratories Educational programs Education Europe Internet Electronic learning Vocational training Instruments Collaborative software computer networks

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Tailor-made tricalcium phosphate bone implant directly fabricated by a three-dimensional ink-jet printer

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Journal of Artificial Organs 2006年第4期9卷 234-240页

作者： Igawa, Kazuyo Mochizuki, Manabu Sugimori, Osamu Shimizu, Koutaro Yamazawa, Kenji Kawaguchi, Hiroshi Nakamura, Kozo Takato, Tsuyoshi Nishimura, Ryouhei Suzuki, Shigeki Anzai, Masahiro Chung, Ung-Il Sasaki, Nobuo Division of Tissue Engineering University of Tokyo Hospital Bunkyo-ku Tokyo 113-8655 7-3-1 Hongo Japan Laboratory of Veterinary Diagnostic Imaging Department of Veterinary Medicine Tokyo University of Agriculture and Technology Tokyo Japan Laboratory of Veterinary Surgery Graduate School of Agricultural and Life Sciences University of Tokyo Tokyo Japan New X-national Technology K.K. Tokyo Japan Advanced Development and Supporting Center RIKEN Wako Japan Division of Sensory and Motor System Medicine Faculty of Medicine University of Tokyo Tokyo Japan

Rapid prototyping (RP) is a molding technique that builds a three-dimensional (3D) model from computer-aided design (CAD) data. We fabricated new tailor-made bone implants (TIs) from α-tricalcium phosphate powder using an RP ink-jet printer based on computed tomography (CT) data, and evaluated their safety and efficacy. CT data of the skulls of seven beagle dogs were obtained and converted to CAD data, and bone defects were virtually made in the skull bilaterally. TIs were designed to fit the defects and were fabricated using the 3D ink-jet printer with six horizontal cylindrical holes running through the implants, designed for possible facilitation of vascular invasion and bone regeneration. As a control, hydroxyapatite implants (HIs) were cut manually from porous hydroxyapatite blocks. Then, craniectomy was performed to create real skull defects, and TIs and HIs were implanted. After implantation, CT was performed regularly, and the animals were euthanized at 24 weeks. No major side effects were observed. CT analysis showed narrowing of the cylindrical holes;bony bridging between the implants and the temporal bone was observed only for TIs. Histological analysis revealed substantial new bone formation inside the cylindrical holes in the TIs, while mainly connective tissues invaded the porous structures in HIs. Bone marrow was observed only in TIs. Osteoclasts were seen to resorb regenerated bone from inside the cylindrical holes and to invade and probably resorb the TIs. These data suggest that TIs are a safe and effective bone substitute, possessing osteoconductivity comparable with that of HIs. © 2006 The Japanese Society for Artificial Organs.

关键词： Biodegradability Bone substitute Tailor-made implant Three-dimensional ink-jet printer Tricalcium phosphate

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Structured pseudospectra for matrix functions: Theory and application

Structured pseudospectra for matrix functions: Theory and ap...

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作者： Michiels, W. Wagenknecht, T. Green, K. Department of Computer Science K.U. Leuven Celestijnenlaan 200A B-3001 Heverlee Belgium Bristol Laboratory for Advanced Dynamics Engineering University of Bristol Queen's Building University Walk Bristol BS8 1TR United Kingdom Shool of Mathematics University of Manchester Sackville Street Manchester M60 1QD United Kingdom Department of Theoretical Physics Faculty of Exact Sciences Vrije Universiteit De Boelelaan 1081 1081 HV Amsterdam Netherlands

We introduce structured pseudospectra for analytic matrix functions and derive computable formulae. The results are applied to the sensitivity analysis of the eigenvalues of a time-delay system arising from laser phys... 详细信息

ISBN: (纸本)9783902661111

关键词： Sensitivity analysis

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Preliminary Evaluation of Recommended Airline Exercises for Optimal Calf Muscle Pump Activity

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European Journal of Vascular and Endovascular Surgery 2006年第3期32卷 340-340页

作者： K.J. O'Donovan T. Bajd P.A. Grace D.T. O'Keeffe G.M. Lyons Biomedical Electronics Laboratory Department of Electronic and Computer Engineering University of Limerick Limerick Ireland Laboratory of Robotics and Biomedical Engineering Faculty of Electrical Engineering University of Ljubljana Ljubljana Slovenia Vascular Imaging Laboratory Department of Vascular Surgery Mid-Western Regional Hospital Limerick Ireland

Objectives A preliminary study to investigate which of the recommended airline exercises for DVT prevention produce optimal calf muscle pump activity. Methods Four subjects were instructed to carry out ten lower leg exercises based on those recommended by airlines for DVT prevention. An EMG sensor was used to record calf muscle activity and a motion analysis system was used to ensure the exercise was conducted correctly. Results Statistical analysis showed significant differences in the level of calf muscle pump activity induced by the different exercises. Heel rise foot pumps were shown to induce highest levels of activity while many exercises did not induce any significant calf muscle activity at all. Conclusion These findings indicate that a further, more detailed examination of the exercises recommended to passengers for DVT prevention on long distance flights should be conducted to determine the potential benefit to the health and safety of the passenger.

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STRUCTURED PSEUDOSPECTRA FOR MATRIX FUNCTIONS: THEORY AND APPLICATION

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IFAC Proceedings Volumes 2006年第10期39卷 151-156页

作者： W. Michiels T. Wagenknecht K. Green Department of Computer Science K.U. Leuven Celestijnenlaan 200A B-3001 Heverlee Belgium Bristol Laboratory for Advanced Dynamics Engineering University of Bristol Queen's Building University Walk Bristol BS8 1TR UK Shool of Mathematics University of Manchester Sackville Street Manchester M60 1QD UK Department of Theoretical Physics Faculty of Exact Sciences Vrije Universiteit De Boelelaan 1081 1081 HV Amsterdam The Netherlands

关键词： pseudospectra structured singular values time-delay systems

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Variance estimation based on maximums of samples

Elektrotehniski Vestnik/Electrotechnical Review

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Elektrotehniski Vestnik/Electrotechnical Review 2005年第1期72卷 3-7页

作者： Košir, Andrej Tasič, Jurij Tržaška 25 1000 Ljubljana Laboratory for Digital Signal Faculty of Electrical Engineering University of Ljubljana Department of System Theory and Computing University of Ljubljana

In this paper, an estimation of the Gaussian noise variance based on observed (measured) maximums of subsets of samples is given. Circumstances of the measurement environment being limited, only maximums of subsets of samples are available and the non-constant variance of the Gaussian noise can be estimated. In the case of power line noise, the variance of the zero mean Gaussian noise is a periodic function of the a-priory known parameterization. Variance function parameters estimation is computed in two steps, first the estimation formula of the constant variance Gaussian noise is applied to a certain subset of samples and second, the least mean square criterion (LMS) is applied to fit the parametrized variance function to estimated variances. The Maximum likelihood estimation (MLE) criterion is applied to derive estimators of the variance function parameters. Beside that, the quotient of the variance of the zero mean Gaussian noise and its maximums is evolved explicitly. Experimental results on real and simulated data are given to demonstrate their accuracy.

关键词： Gaussian noise (electronic)

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Abstracts from the 6th International Conference on the engineering of Sport, 10-14 July 2006, Olympic Hall, Munich, Germany Abstracts

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SPORTS engineering 2006年第2期9卷 107-127页

作者： [Anonymous] University of Massachusetts Lowell USA Science & Mathematics Department Kettering University Flint USA University of Illinois USA Western Michigan University USA Washington State University USA Casecade Engine USA Kanazawa University Japan Sumitomo Light Metal Japan Massachusetts Institute of Technology USA Nanyang Technological University Bioengineering Singapore University of Vienna Anthropology Austria Department of Mechanical Engineering University of Bath UK INSA Lyon France PETZL France Sports Materials Research Group University of Birmingham UK Laboratoire de Modélisation des Activités Sportives Bourget du Lac France Technical University Kaiserslautern Germany Department of Engineering Mechanics United States Air Force Academy Colorado Springs USA SRAM Corporation Colorado Springs USA Sports Engineering Research Group University of Sheffield UK Sports Engineering CSES Sheffield Hallam University USA Sports Engineering CSES Sheffield Hallam University UK Technische Universität München Germany Rush University Medical Center Chicago USA Faculty of Sports Science Department of Sport Equipment & Materials TU München Germany RMIT University Australia Institute of Health and Sports Sciences University of Tsukuba Ibaraki Japan Machine and Control Department Polytechnic University Kanagawa Japan SRI Sports Ltd. Hyogo Japan SRI Research and Development Ltd. Hyogo Japan Mizuno Corporation Osaka Japan Fukuoka Institute of Technology Fukuoka Japan University of Limerick Éire Graduate School of Engineering Hokkaido University Japan Faculty of Engineering Kitami Institute of Technology Japan University of Calgary Canada TaylorMade-adidas Golf Company USA Davis Mechanical Engineering University of California USA Davis Mechanical & Aeronautical Engineering University of California USA University of Wales Institute Cardiff Cardiff School of Sport UWIC Cardiff Cardiff School of Sport UWIC Wales Loughborough University UK Cranfield University UK Cr

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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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