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2nd International Conference on Signals, Circuits and systems

作者： Mahjoub, Sonia Mnif, Faical Derbel, Nabil Research unit on Intelligent Control design Optimization of complex Systems (ICOS) Department of Electrical and Computer Engineering Sultan Qaboos University Muscat Oman

ISBN: (纸本)9781424426270

In this paper, we present a VSS-based tracking control for a fixed point regulation of 2-DOF underactuated manipilators The design approach is systematic and relies on the selection of appropriate choice of two sliding surface. The controller is designed for the both sliding surfaces are attractive. Lyapunov theory is used to study and demonstrate the stability of the system. Convergence of state space is proved and robustness issues to bounded disturbances are also investigated. Simulation results on 2-DOF whirling pendulum are presented to chow the effectiveness of this approach.

关键词： VSS sliding mode underactuated manipulator whirling pendulum

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Editorial introduction for the special issue on sensors for microfluidic analysis systems

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IEEE Sensors Journal 2008年第5期8卷 427-429页

作者： Nagle, H. Troy Fair, Richard B. Shannon, Mark A. Tan, Ooi Kiang Geschke, Oliver Ahn, Chong H. Kaynak, Okyay Vellekoop, Michael J. Duke University Department of Electrical and Computer Engineering Durham NC 27708 United States University of Illinois at Urbana-Champaign Department of Mechanical Engineering Urbana IL 61801-2906 United States Nanyang Technological University Division of Microelectronics School of Electrical and Electronic Engineering Singapore 639798 Singapore Technical University of Denmark Department of Micro- and Nanotechnology Kongens Lyngby DK-2800 Denmark University of Cincinnati Department of Electrical and Computer Engineering and Computer Science Cincinnati OH 45221-0030 United States Bogazici University Department of Electrical and Electronics Engineering Istanbul 34342 Turkey Vienna University of Technology Institute of Sensor and Actuator Systems Vienna A-1040 Austria Department of Electrical and Computer Engineering Duke University Electrochemical Society Department of Mechanical Engineering University of Illinois at Urbana-Champaign Urbana IL United States National Science Foundation Science and Technology Center WaterCAMPWS Micro-Nano-Mechanical Systems Laboratory Nanyang Technological University School of Electrical and Electronic Engineering Department of Electrical and Computer Engineering and Computer Science University of Cincinnati Cincinnati OH United States Departments of Electrical Engineering and Biomedical Engineering Microsystems and BioMEMS Laboratory Univensity of Cincinnati Departments of Electrical and Electronics Engineering Bogazici University Istanbul Turkey UNESCO Mechatronics Research and Annlication Centre Vienna Austria Department of Industrial Sensor Systems Institute of Sensor and Actuator Systems Vienna University of Technology Vienna Austria

No abstract available

关键词： Special issues and sections Sensor systems Microfluidics Microelectronics USA Councils Mechanical engineering Actuators Fabrication Biosensors Ferroelectric materials

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Introduction to the special section on advances in test automation: The evolution of TTCN-3

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International Journal on Software Tools for Technology Transfer 2008年第4期10卷 281-283页

作者： Schieferdecker, Ina Grabowski, Jens Design and Testing of Communication-Based Systems Faculty IV - Electrical Engineering and Computer Science Technical University Berlin Franklinstr. 28-29 Berlin 10587 Germany Software Engineering for Distributed Systems Group Institute of Computer Science University of Göttingen Lotzestrasse 16-18 Göttingen 37083 Germany

No abstract available

关键词： TESTING -- Equipment & supplies TECHNOLOGICAL innovations COMMAND & control systems TELECOMMUNICATION systems

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Control design for efficient and cost-effective distributed fuel cell power electronics system

Control design for efficient and cost-effective distributed ...

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34th Annual Conference of the IEEE Industrial Electronics Society, IECON 2008

作者： Mazumder, Sudip K. Pradhan, Sanjaya K. Laboratory for Energy and Switching-Electronics Systems Department of Electrical and Computer Engineering University of Illinois Chicago United States Product Design Engineer Philips United States

ISBN: (纸本)9781424417667

Batteries in a fuel cell power system are essential to provide the additional load demands during the sharp load transients. This necessitates a power electronics system, which would control the energy flow between the fuel cell stack, the battery and the load during the transient and in the steady-state. In this paper, a cost-effective and efficient power electronic system is proposed for a fuel cell based hybrid power system based on a distributed power electronics topology. The system includes a hierarchical controlling architecture, in which the master control optimizes the control parameters of the individual subsystem controls, which in turn optimizes the performance and efficiency of the overall system while nullifying the effects of load transients on the fuel cell stack subsystem. The power electronics system concept is further experimentally validated using a four module bidirectional dc-dc converter with Nexa PEM stack. © 2008 IEEE.

关键词： Cost effectiveness

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Model order selection for multiple cooperative swarms clustering using stability analysis

Model order selection for multiple cooperative swarms cluste...

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Congress on Evolutionary Computation

作者： Abbas Ahmadi Fakhri Karray Mohamed Kamel Department of Systems Design Engineering University of Waterloo Canada Department of Electrical and Computer Engineering University of Waterloo Canada

Extracting different clusters of the given data is an appealing topic in swarm intelligence applications. This paper introduces multiple cooperative swarms and single swarm clustering approaches and provides mathematical descriptions explaining why the former approach outperform the other one. Moreover, the stability analysis is proposed to obtain the model order of the data using multiple cooperative swarms clustering approach. The proposed clustering approach is evaluated using three data sets and its performance is compared with that of other clustering techniques.

关键词： Clustering algorithms Stability analysis Distance measurement Classification algorithms Algorithm design and analysis Particle swarm optimization Data models

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Deblocking of Block-Transform Compressed Images Using Phase-Adaptive Shifted Thresholding

Deblocking of Block-Transform Compressed Images Using Phase-...

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IEEE International Symposium on Multimedia

作者： Alexander Wong William Bishop Systems Design Engineering University of Waterloo Waterloo ONT Canada Electrical and Computer Engineering University of Waterloo Waterloo ONT Canada

Many popular image compression schemes are based on block-transform coding, a technique where images are broken into small blocks of pixels prior to transformation and compression. Block-transform coding often introduces blocking artifacts which are particularly prevalent at low bit-rates due to quantization errors. A novel algorithm for deblocking block-transform compressed images is proposed in this paper. This algorithm is based on a phase-adaptive, shifted thresholding technique that estimates the original uncompressed image as the weighted sum of shifted versions of the decompressed image subjected to a threshold. An efficient integer transform is used to construct the shifted versions of the decompressed image. The aggregation weights are obtained adaptively using the local phase moment characteristics of the underlying image content. The proposed algorithm utilizes important human perceptual characteristics to provide effective image deblocking while preserving image detail. Experimental results show that the proposed algorithm is more efficient than comparable methods and yields both subjective results and peak signal-to-noise ratio (PSNR) results comparable to existing methods.

关键词： Image coding Compression algorithms Image storage Quantization Transform coding Pixel PSNR Video compression Image quality Filtering

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Robust Edge Detection Based on Non-local Contribution of Local Frequency Characteristics

Robust Edge Detection Based on Non-local Contribution of Loc...

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IEEE International Symposium on Multimedia

作者： Alexander Wong William Bishop Systems Design Engineering University of Waterloo Waterloo ONT Canada Electrical and Computer Engineering University of Waterloo Waterloo ONT Canada

This paper introduces a robust approach to the problem of edge detection in situations characterized by high levels of image degradation and illumination non-uniformity. Popular edge detection methods are dependent solely on local image characteristics to localize edge information. In the proposed algorithm, we demonstrate that superior edge detection performance can be achieved by utilizing nonlocal image characteristics. This is accomplished by estimating the edge strength of a given pixel based on the local frequency characteristics of every pixel within an image. The proposed method is highly robust to scenarios characterized by illumination non-uniformity and low signal-to-noise ratios. Experimental results show that using the proposed method, edge detection can be qualitatively improved over existing methods on a small set of test images.

关键词： Robustness Image edge detection Lighting Frequency estimation Degradation Pixel Detectors computer vision Image analysis Multimedia systems

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Bio-Inspired Adaptive Integrated Information Processing

Bio-Inspired Adaptive Integrated Information Processing

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IEEE National Conference on Aerospace and Electronics (NAECON)

作者： Hoda S. Abdel-Aty-Zohdy Microelectronics Systems Design Laboratory Department of Electrical and Computer Engineering Oakland University Rochester MI USA

Biological brains are dramatically more effective in dealing with real-world adaptive information processes and decisions than most advanced computers. Advanced computers can utilize the discipline of classical signal processing whereby providing theoretical mathematical and statistical approaches for information processing, and with the vision of bio-inspired adaptive processing are evolving into neuromorphic integrated sensory processing systems. Numerous MISO (multi-input, single output) sensory applications demand reliable and effective information processing which, at an initial stage may be addressed by solving the key problems of advanced computing platforms, which are: i-massive parallelism; ii-low power consumption of massively large systems; iii-intelligent systems that learn from observations and perform better on the next run; iv-integrated systems for embedded feasibility; and v-systems that adapt to the environment. Thus, our Adaptive Integrated Information Processing (AIIP) approaches, presented in this paper. Two AIIP systems are presented: Neural networks with synaptic plasticity, as our Spiking Neural Networks (SNNs), with up to one million inputs, for chemical sensing and detection; and Adaptive Recurrent Dynamic Neural Networks (ARDNNs) for defect tracking, reliable system deployment, and prognosis for telecommunication and similar applications. Further-our presented AIIP systems may provide a viable solution to offering powerful modulation schemes and transmission rates far beyond current possible communications systems.

关键词： Information processing Power system reliability Biological neural networks Neural networks Recurrent neural networks Biology computing computer vision Adaptive signal processing Biomedical signal processing Neuromorphics

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Characterization of IP flows eligible for lambda-connections in optical networks

Characterization of IP flows eligible for lambda-connections...

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IEEE Symposium on Network Operations and Management

作者： Tiago Fioreze Mattijs Oude Wolbers Remco van de Meent Aiko Pras Faculty of Electrical Engineering Mathematics and Computer ScienceDepartment of Design and Analysis of Communication Systems University of Twente Enschede Netherlands

The advance on data transmission in optical networks has allowed data forwarding decisions to be taken at multiple levels in the protocol stack (e.g., at network and optical levels). With such capability, big IP flows can be moved from the network level and switched completely at the optical level over lambda-connections, where they get better quality of service (QoS). Meanwhile, the regular IP routing level is offloaded and can serve smaller flows better. With the continuous growing of traffic on the Internet, the selection of big IP flows can become difficult to be done by using current management approaches (conventional management and generalized multiprotocol label switching (GMPLS) signaling). The University of Twente (UT) is researching the use of self-management as an alternative to overcome this issue. In order to properly identify IP flows eligible to be moved to the optical level, the characteristics of these flows must be known, though. In this context, this paper analyses some of the characteristics of IP flows eligible to the optical level by observing their size, duration, throughput, and recurrence. In this analysis, we observe those characteristics while using various definitions for an IP flow as well as using different time intervals. The main contribution of this paper is to show the behavior of IP flows eligible for lambda-connections. Not in the least, we also show how this knowledge can be used in our self-management of optical networks approach.

关键词： Image motion analysis Optical fiber networks Quality of service Data communication Protocols Routing Telecommunication traffic Internet Multiprotocol label switching Throughput

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design and modeling of a wideband MEMS-based energy harvester with experimental verification

Design and modeling of a wideband MEMS-based energy harveste...

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Microsystems and Nanoelectronics Research Conference (MNRC)

作者： M. S. M. Soliman E. F. El-Saadany E. M. Abdel-Rahman R. R. Mansour Department of Electrical and Computer Engineering University of Waterloo Waterloo ONT Canada Department of Systems Design Engineering University of Waterloo Waterloo ONT Canada

In this paper, we propose a solution for the narrow band operation which is one of the main issues in the operation of vibration-based energy harvesters, i.e. micro power generators (MPGpsilas). The solution is based on utilizing piecewise-linear oscillators along with decreasing the effective damping ratio of the resonator. The system is modeled and a macro electromagnetic vibration-based energy harvester was examined to verify analytical results. The feasibility of applying such technique on a MEMS-based electromagnetic MPG is discussed.

关键词： Wideband Prototypes Damping Power generation Resonant frequency Bandwidth Coils Magnetic field measurement Piecewise linear techniques Oscillators

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