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IEEE International Conference on Electronics, Circuits and systems (ICECS)

作者： Sayed Alireza Sadrossadat Minoo Mirsaeedi Kumaraswamy Ponnambalam Mohab Anis Department of Electrical and Computer Engineering University of Waterloo Waterloo ONT Canada Department of Systems Design Engineering University of Waterloo Waterloo ONT Canada

ISBN: (纸本)9781424450909;9781424450916

This paper presents a statistical framework for the design of flip-flops under process variations in order to maximize their timing yield. In nanometer CMOS technologies, process variations significantly impact the timing performance of sequential circuits which may eventually cause their malfunction. Therefore, developing a framework for designing such circuits is inevitable. Our framework generates the values of the nominal design parameters; i.e., the size of gates and transmission gates of flip-flop such that maximum timing yield is achieved for flip-flops. While previous works focused on improving the yield of flip-flops, less research was done to improve the timing yield in the presence of process variations.

关键词： Flip-flops Timing Clocks Microprocessors Digital circuits CMOS technology Process design Frequency Noise robustness Latches

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Application of the latency insertion method to circuits with blackbox macromodel representation

Application of the latency insertion method to circuits with...

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Electronics Packaging Technology Conference (EPTC)

作者： José Schutt-Ainé Dmitri Klokotov Patrick Goh Jilin Tan Feras Al-Hawari Ping Liu Wenliang Dai Department of Electrical and Computer Engineering University of Illinois Urbana-Champaign USA Cadence Design Systems Inc. China

ISBN: (纸本)9781424450992

In this work the latency insertion method (LIM) is applied to the treatment of blackbox networks described by their frequency-domain scattering parameters. The method allows the simulation of passive macromodels in the LIM environment. This generalization allows LIM to simulate subnetworks with frequency-dependent parameters describing phenomena such as skin effect and substrate loss. The derivation of the algorithms is presented as well as simulation results to validate the method.

关键词： Delay Circuit simulation Computational modeling Frequency Voltage Scattering parameters Equations Integrated circuit interconnections SPICE Circuit analysis

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Robust sliding mode control applied to double Inverted pendulum system

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AIP Conference Proceedings 2009年第1期1107卷 222-228页

作者： Sonia Mahjoub Faiçal Mnif Nabil Derbel aResearch unit on Intelligent Control design & Optimization of complex Systems (ICOS) National engineering school of sfax BP W 3038 Sfax bDepartment of Electrical and Computer Engineering Sultan Qaboos University Muscat Oman

A three hierarchical sliding mode control is presented for a class of an underactuated system which can overcome the mismatched perturbations. The considered underactuated system is a double inverted pendulum (DIP), can be modeled by three subsystems. Such structure allows the construction of several designs of hierarchies for the controller. For all hierarchical designs, the asymptotic stability of every layer sliding mode surface and the sliding mode surface of subsystems are proved theoretically by Barbalat’s lemma. Simulation results show the validity of these methods.

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Comparison of international learning outcomes and development of engineering curricula

Comparison of international learning outcomes and developmen...

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2009 ASEE Annual Conference and Exposition

作者： Alkhairy, Ashraf Blank, Leland Boning, Duane Cardwell, David Carter, W. Craig Collings, Nick Hayhurst, Allan Milne, William Robinson, Peter Seering, Warren Sheppard, Sallie Smith, Kenneth Stronge, Bill Alfaisal University Saudi Arabia Texas A and M University Qatar United States Department of Electrical Engineering and Computer Science MIT United States Department of Engineering University of Cambridge United Kingdom Department of Materials Science MIT United States Department of Chemical Engineering Cambridge University United Kingdom Department of Electrical Engineering Cambridge University United Kingdom Electronic Devices and Materials Group United Kingdom Department of Computer Technology Computer Laboratory University of Cambridge United Kingdom Department of Mechanical Engineering MIT United States Department of Engineering Systems MIT United States Design and Systems Division of Mechanical Engineering Nissan Cambridge Basic Research Laboratory MIT Center for Innovation in Product Development Department of Computer Science Texas A and M University United States Department of Chemical Engineering MIT United States Whitaker College of Health Sciences and Technology United States Department of Applied Mechanics Cambridge University United Kingdom University of California Davis United States

Various national and regional engineering accreditation bodies have developed sets of learning or program outcomes that serve as the foundation for the evaluation of curriculum quality. Some of the outcome structures are very broadly defined, leaving the details of curriculum design and the justification to the university and the accreditation evaluators. Other accreditation bodies define outcomes more thoroughly in topic and depth, with accreditation hinging on the general fit of the curriculum to these specifications. Most of these outcome structures have been developed and used as accreditation standards predominantly over the last decade. During this time, existing curricula are usually altered and upgraded (that is, 'retrofitted') to meet the outcomes requirements. However, new degree programs and new engineering colleges have the opportunity to use the relevant outcomes as design specifications. Such a design ensures quality, prepares the college for future accreditation evaluation, and can be tailored to meet the needs of students and prospective employers. This paper compares the outcomes structure and contents of several accreditation bodies, including the engineering Council of the UK (EC UK), EUR-ACE of the EU, and ABET of the USA. Similarities and differences between the outcomes of the bodies will be highlighted. The use of these accrediting standards as the basis of design specifications for engineering degrees at the Alfaisal University in Riyadh, Saudi Arabia will be presented. The designs for integrated BS, MS and PhD curricula were developed over a two-year period, based on the defined learning outcomes, by a committee comprised of the Founding Dean of engineering and faculty from the Massachusetts Institute of Technology (MIT), the University of Cambridge and independent reviewers. Example BS and MS curricula and their fit to the outcome specifications are described. © American Society for engineering Education, 2009.

关键词： Accreditation

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LMS Finite Memory Estimators for Discrete-time State Space Models

LMS Finite Memory Estimators for Discrete-time State Space M...

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Joint 48th IEEE Conference on Decision and Control and 28th Chinese Control Conference

作者： Jung Hun Park Soohee Han Wook Hyun Kwon BK21 School for Creative Engineering Design of Next Generation Mechanical and Aerospace Systems Seoul National University Department of Electrical Engineering Konkuk University School of Electrical Engineering & Computer Science Seoul National University

In this paper,a least-mean-squares(LMS) finite memory(FM) estimator for a stochastic discrete-time state space model is obtained by taking the conditional expectation of the estimated state given a finite number of inputs and outputs measured on the recent finite *** a priori state information is not involved and any arbitrary constraints are not *** a general discrete-time state space model with both system and measurement noises,the LMS FM estimator is represented in a *** turns out that the proposed LMS FM estimator has the unbiased property and the linear structure with respect to inputs and outputs on the recent finite horizon.

关键词： LMS Finite Memory Estimators for Discrete-time State Space Models

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Automatic processing of Arabic text

Automatic processing of Arabic text

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International Conference on Innovations in Information Technology

作者： Ziad Osman Lama Hamandi Rached Zantout Fadi N. Sibai Electrical Engineering Beirut Arab University Beirut Lebanon Electrical and Computer Engineering American University of Beirut Lebanon College of Computer and Info Sciences Prince Sultan University Riyadh KSA Computer Systems Design UAE University Al Ain UAE

ISBN: (纸本)9781424456987

Automatic recognition of printed and handwritten documents remains an active area of research. Arabic is one of the languages that present special problems. Arabic is cursive and therefore necessitates a segmentation process to determine the boundaries of a character. Arabic characters consist of multiple disconnected parts. Dots and Diacritics are used in many Arabic characters and can appear above or below the main body of the character. In Arabic, the same letter has up to four different forms depending on where it appears in the word and depending on the letters that are adjacent to it. In this paper, a novel approach is described that recognizes Arabic script documents. The method starts by preprocessing which involves binarization, noise reduction, and thinning. The text is then segmented into separate lines. Characters are then segmented by determining bifurcation points that are near the baseline. Segmented characters are then compared to prestored templates to identify the best match. The template comparisons are based on central moments, Hu moments, and Invariant moments. The method is proven to work satisfactorily for scanned printed Arabic text. The paper concludes with a discussion of the drawbacks of the method, and a description of possible solutions.

关键词： Optical character recognition software Character recognition Feature extraction Educational institutions Handwriting recognition Text recognition Noise reduction design engineering Bifurcation Office automation

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Model predictive control of fuel cell micro cogeneration systems

Model predictive control of fuel cell micro cogeneration sys...

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2009 IEEE International Conference on Networking, Sensing and Control, ICNSC 2009

作者： Houwing, Michiel Negenborn, Rudy R. Ilic, Marija D. Schutter, Bart De Faculty of Technology Policy and Management of Delft University of Technology Jaffalaan 5 2628 BX Delft Netherlands Departments of Electrical and Computer Engineering and Engineering and Public Policy Carnegie MellonUniversity Pittsburgh PA United States Delft Center for Systems and Control of Delft University of Technology Mekelweg 2 2628 CD Delft Netherlands Marine and Transport Technology Department of Delft University of Technology Netherlands

ISBN: (纸本)9781424434923

With the increasing application of distributed energy resources and information technologies in the electricity infrastructure, innovative possibilities for incorporating the demand side more actively in power system operation are enabled. At the residential level energy costs could be reduced with intelligent price-based control concepts (demand response). A promising, controllable, residential distributed generation technology is micro cogeneration (micro-CHP). Micro-CHP is an energy efficient technology that simultaneously provides heat and electricity to households during operation. This paper presents a detailed model of a household using a proton exchange membrane fuel cell (PEMFC) micro- CHP system in conjunction with heat storage options to fulfil its heat and part of its electricity demand. Furthermore, a decentralised controller based on a model predictive control (MPC) strategy is proposed. MPC can take benefit of future knowledge on prizes and energy demands and can therefore lead to better system performance. In simulations the performance of the MPC-controlled PEMFC system is illustrated under different conditions regarding energy pricing, domestic energy demand, and system configuration. © 2009 IEEE.

关键词： Model predictive control

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Construction of Lyapunov-Krasovskii Functionals for Interconnection of Retarded Dynamic and Static systems via a Small-Gain Condition

Construction of Lyapunov-Krasovskii Functionals for Intercon...

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Joint 48th IEEE Conference on Decision and Control and 28th Chinese Control Conference

作者： Hiroshi Ito Pierdomenico Pepe Zhong-Ping Jiang the Department of Systems Design and Informatics Kyushu Institute of Technology the Department of Electrical and Information Engineering University of L’Aquila the Department of Electrical and Computer Engineering Polytechnic Institute of New York UniversitySix Metrotech Center

This paper addresses the problem of constructing Lyapunov-Krasovskii functionals for verifying integral inputto-state stability(i ISS) and input-to-state stability(ISS) of timedelay nonlinear *** on decomposition of a timedelay system into a dynamic component(a functional differential equation) and static components(functional algebraic equations),this paper develops an i ISS small-gain theorem for the interconnection of these components to assess the stability of the overall time-delay *** discrete and distributed delays can be involved in the dynamic and the static *** result can be considered as a counterpart of the author's previous work which only deals with dynamic *** the construction of Lyapunov-Krasovskii functionals,this paper introduces a new technique which differs from the one employed in the dynamic case.

关键词： ISS Construction of Lyapunov-Krasovskii Functionals for Interconnection of Retarded Dynamic and Static systems via a Small-Gain Condition Lyapunov

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T-matching networks for the efficient matching of practical RFID tags

T-matching networks for the efficient matching of practical ...

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European Microwave Week 2009, EuMW 2009: Science, Progress and Quality at Radiofrequencies - 39th European Microwave Conference, EuMC 2009

作者： Choo, J. Ryoo, J. Hong, J. Jeon, H. Choi, C. Tentzeris, Manos M. RFID Research Lab. LS Industrial Systems 533 Hogye-dong Dongan-gu Anyang-si Gyeonggi-do 431-080 Korea Republic of Georgia Electronic Design Center School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta GA 30332-0250 United States

ISBN: (纸本)9782874870118

In this paper, we study T-matching networks that are commonly used for the efficient matching of UHF tags. In order to analyze relationship between T-matching geometry and antenna impedance, we interpret the transformer circuit as an equivalent circuit depending on the design parameters of the circuit. From the parametric study of the T-matching, we derive an optimized topology which is able to overcome electrically change of the geometry resulted from material loading. Next, based on the previous study, we design two types of tag antennas for practical item-level RFID applications that require the discrimination different objects. We calculate theoretically the minimum operating power of tags based on the computed antenna characteristics, antenna impedance, directivity, efficiency, regarding various dielectric constants. To verify the performance of the developed tags in practical conditions, we measure the minimum required power to activate tags on multiple objects in conjunction with commercial measurement system. As a result, the designed tags present almost consistent readability on materials from low to high dielectric constant. Thus, the results clearly verify that the appropriate T-matching geometry provides consistent readability in practical UHF RFID tags. © 2009 EuMA.

关键词： Equivalent circuits

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A successive method for designing an observer-based strictly positive real H2 controller

A successive method for designing an observer-based strictly...

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Asian Control Conference

作者： Yasushi Kami Kenji Mitsui Eitaku Nobuyama Department of Electrical and Computer Engineering Akashi National College of Technology Hyogo Japan Faculty of Engineering Gifu University Gifu Japan Department of Systems Design and Informatics Kyushu Institute of Technology Fukuoka Japan

ISBN: (纸本)9781424454402

This paper is concerned with a strictly positive real H 2 controller design problem using an observer-based controller with Kalman filter gain. In this paper, we propose a successive method with non-common Lyapunov variables for this control problem. The feature of our method is to construct a controller sequence on which H 2 norm is monotonically non-increasingly while all controllers are strictly positive real. A numerical example shows the efficiency of our method.

关键词： design methodology Control systems Robust stability Hydrogen Optimal control Linear matrix inequalities Closed loop systems Electric variables control Educational institutions State-space methods

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