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Interactive tools for signal processing education. The signal processing instructional facility (SPIF lab) at Washington State University

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computer Applications in engineering Education 1993年第6期1卷 517-517页

作者： Bamberger, R.H. Signal Processing Instructional Facility School of Electrical Engineering and Computer Science Washington State University Pullman WA 99164-2752 Dr. Roberto H. Bamberger:was born on January 30 1965 in Buenos Aires Argentina. He received his B.E.E and PhD from the Georgia Institute of Technology in 1986 and 1990 respectively. Currently Dr. Bamberger is an assistant professor in the School of Electrical Engineering and Computer Science at Washington State University. Dr. Bamberger's research program is focused on the design implementation and application of multidimensional multirate filter banks subband image and video compression analysis of nonstationary data and application of digital signal processing techniques in the design of analog and mixed-mode integrated circuits. Dr. Bamberger is the founder and director of the Signal Processing Instructional Facility (SPIF Lab) at Washington State University. The SPIF Lab features interactive multimedia-based tools for teaching concepts related to linear systems theory. Dr. Bamberger is active in developing multimedia-based instructional laboratories for a variety of other topics as well. In addition to his teaching and research programs Dr. Bamberger is an associate editor for theIEEE Transactions on Signal Processingand a member of the editorial board forComputer Applications in Engineering Education. Dr. Bamberger is also advisor to the WSU Student Branch of the IEEE and assistant director of the WSU Cougar Marching Band. Dr. Bamberger is a member of Phi Eta Sigma Eta Kappa Nu Tau Beta Pi and Kappa Kappa Psi.

The Signal Processing Instructional Facility (SPIF Lab) is an experiment in using in interactive multimedia for teaching concepts related to linear systems theory and signal processing. The goals of the SPIF lab are to augment, enhance, and interconnect sophomore, junior, and senior level courses with the common thread of linear systems and transforms by unifying the experimentation medium. In this fashion, physical phenomenon is returned to the forefront of engineering education. The laboratory features powerful Mathematica Notebooks (a form of hypertext) and interactive applications that use dedicated DSP microprocessors.

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Interactive video lessons for electromagnetic education

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computer Applications in engineering Education 1993年第2期1卷 147-147页

作者： Iskander, M.F. Reed, T. Breen, J. III. Electrical Engineering Department University of Utah Salt Lake City Utah 84112 Dr. Iskander edited two special issues of theJournal of Microwave Power one on “Electromagnetics and Energy Applications” March 1983 and the other on “Electromagnetic Techniques in Medical Diagnosis and Imaging” September 1983. He authored one book onElectromagnetic Fields and Waves published by Prentice Hall 1992 he edited theCAEME Software Book Vol. I 1991 and coedited two books onMicrowave Processing of Materials one published by the Materials Research Society in 1991 and the second to be published in 1992. The holder of seven patents he has contributed 16 chapters to eight research books published more than 100 papers in technical journals and made numerous presentations in technical conferences. In 1983 he received the College of Engineering Outstanding Teaching Award and the College Patent Award for creative innovative and practical invention. In 1984 he was selected by the Utah Section of the IEEE as the Engineer of the Year. In 1984 he received the Outstanding Paper Award from the International Microwave Power Institute and in 1985 he received the Curtis W. McGraw ASEE National Research Award for outstanding early achievements by a university faculty member. In 1991 he received the ASEE George Westinghouse National Award for innovation in Engineering Education. He also received the 1992 Richard R. Stoddard Award from the IEEE EMC Society. In 1986 Dr. Iskander established the Engineering Clinic Program in the College of Engineering at the University of Utah. Since then the program has attracted more than 45 research projects from 18 different companies throughout the United States. He is also the director of the NSF/IEEE Center for Computer Applications in Electromagnetics Education (CAEME). He coorganized symposia on “Microwave Processing of Materials” held in conjunction with Materials Research Society meetings Springs of 1990 and 1992 in San Francisco. He also organized several workshops and special

With the availability of a large number of software packages for electromagnetic (EM) education through the national computer Applications in Electromagnetic Education (CAEME) Center [1] and other individual efforts, there have been some concerns regarding the ability to integrate this software effectively in routine classroom teaching. Basically, congested EM curricula do not provide instructors with sufficient time to include software demonstrations and simulations during class periods. It is also not clear whether students will be able, adequately and independently, to understand basic underlying concepts and physical phenomena from visualization of colorful graphics and from the output of performed simulations. To help integrate available EM software in classroom teaching for both instructor use and student independent study, CAEME developed three interactive video lessons for student instruction. Interactive media lessons integrate and allow individuals to interactively manipulate information from multimedia such as video, software, and animated graphics, and also include instructional information such as quizzes and tutorials. In this article, we present the features of three interactive video lessons in EM developed by CAEME. These lessons include tutorials, simulations from CAEME software and videos, and quizzes to evaluate student understanding. The lessons use animated graphics illustrating specific dynamic phenomena and specific measurement procedures. They also keep a record of student quiz scores for instructor use. These, as well as other features of the three developed interactive video lessons, and the software and hardware requirements for developing such lessons, will be described.

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Guest Editorial: Focus on Digital Signal Processing Techniques Applied to Space Communications

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European Transactions on Telecommunications 1993年第1期4卷 9-10页

作者： Gaudenzi, Riccardo De Elia, Carlo Harris, Robert A. Rimrdo De Gaudend was born in Rosignano Mmo Italy in 1960. He received the Doctor En- gineer degree (cum Laude) in Electronic Engineering from the University of Pisa. Italy in 1985. From 1986 he was with the European Space Agency (ESA). Stsliow and Communications Engineering Department. Darmrtadt (RFA) where he was involved in satellite telecommunication ground systems design and testing. In particular he followed the development of two new ESA's satellite tracking systems. In 1988 be joined the ESA's Research and Technology Centre (ESTEC). Noordwijk. The Netherlands where is holding a position as releeommunication enginm in the Electrical System Department. He is presently responsible for the definition and development of advanced satellite communication systems. His mull intenst b ddyrducd with effacnt digital modulation and access techniques for fued and mobile wtdlite services synchronization topics and communication systems simulation techniques. Carlo Elia (S'89) was born in Trepuzzi. Italy in 1964. He received the Doctor Engineer degree in Electronic Engineering from Politecnico di Torino. Torino. Italy. in 1989. He his now attending a Doctorate program at PolitanieO di Torino. S i 1990. he has been with the Eurpean Space Agency (ESA) in the Electrical System Department as Tdeeommunications Syrtcm Engineer. His main areas of interest are related to rdvanccd digital modulation and access techniques and channel equalization. R.A. (Bob) Harris (S'69–M'70) received the PhD from the University of Southampton. England in 1971. In 1970 he joined the European Space Agency (then ESRO). based at the European Space Research and Technology Centre (ESTEC) Noordwijk. The Netherlandswas working on telemetry and telecommand systems. Since 1978 he has been Head of the Transmision Techniques Section in the Directorate of Telecom munications. He was involved in the transmission design of the OTS ECS Olympus and European Data Relay systems. He has worked on a wide range of analogue and digital transmission topics wit

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A THEORETICAL-ANALYSIS OF THE LIGHT INTERACTION WITH COAGULATED TISSUE 3

A THEORETICAL-ANALYSIS OF THE LIGHT INTERACTION WITH COAGULA...

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CONF ON LASER-TISSUE INTERACTION 3

作者： JERATH, MR WELCH, AJ Biomedical Engineering Program University of Texas at Austin Austin 78712 TX United States Department of Electrical and Computer Engineering and Biomedical Engineering United States

ISBN: (纸本)0819407925

During laser treatment, coagulation affects the optical properties of the tissue. In particular, the formation of a white lesion increases the scattering coefficient significantly. This change in the optical properties in turn affects the laser light distribution in the tissue. For example, what is the effect of the white lesion formed during photocoagulation of the retina upon reflection and fluence rate? This problem was simulated on a model medium consisting of a thin absorbing black paint layer covered with a 1cm thick layer of fresh egg white. The egg white layer was subdivided into coagulated (white) and uncoagulated (clear) layers. The optical properties of coagulated and uncoagulated egg white were determined. These values were used to model light distribution in the medium for varying thicknesses of the coagulated egg white layer using the one dimensional Adding Doubling method. Our results show that the fluence reaching the paint layer increases until the coagulated layer reaches 100μm, after which it falls off exponentially. It was also found that the total reflected light increases almost linearly at first as the coagulated layer thickens, and then begins to level off to an R∞ at a coagulation thickness of 2mm. Experimental measurements of reflection from a lesion with a CCD camera confirm the computed trends. These results provide a theoretical foundation for control of lesion thickness using reflectance images.

关键词： Tissue

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Continuous time analysis of the response of the pseudomedian and related filters to periodic signals 3

Continuous time analysis of the response of the pseudomedian...

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Nonlinear Image Processing III 1992

作者： Schulze, Mark A. Pearce, John A. Department of Electrical and Computer Engineering and Biomedical Engineering Program University of Texas at Austin AustinTX78712 United States

We introduce a continuous time method to analyze the response of median, pseudomedian, average (mean), and midrange filters to certain periodic signals. The filter definitions are generalized to continuous time, and these definitions are applied to periodic signals such as triangle, square, and sinusoidal waves of varying frequencies. These operations yield "amplitude response" measures which are analytic functions of the frequency of the input signal. In addition, a "correlation" measure is defined to indicate the level of distortion introduced by each filter. Examples of this analysis for the median, pseudomedian, average, and midrange filters show similarities and differences among them. Although these theoretical measures do not perfectly demonstrate the performance of the discrete time filters, continuous time analysis does provide valuable insights into the filter behavior. The response of the continuous time median filter shows its susceptibility to high frequency periodic noise and proves, again, the existence of infinite-length bi-valued fast-fluctuating roots of this filter. The pseudomedian filter, in contrast, completely attenuates amplitude-symmetric periodic signals above a certain frequency, and has no infinite-length fast-fluctuating roots. Continuous time filter analogues are therefore an important theoretical tool for understanding the behavior of both linear and nonlinear filters. © 1992 SPIE. All rights reserved.

关键词： Median filters

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USE OF NEURAL NETWORKS TO IDENTIFY AND COMPENSATE FOR FRICTION IN PRECISION, POSITION CONTROLLED MECHANISMS

USE OF NEURAL NETWORKS TO IDENTIFY AND COMPENSATE FOR FRICTI...

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27TH ANNUAL MEETING OF THE INDUSTRY APPLICATIONS SOC OF IEEE

作者： SEIDL, DR REINEKING, TL LORENZ, RD Department of Electrical and Computer Engineering Manufacturing Systems Engineering Program University of Wisconsin - Madison 1415 Johnson Drive Madison 53706 WI United States

ISBN: (纸本)0780306341

This paper demonstrates that artificial neural networks can identify and compensate for friction in precision, position controlled mechanisms improving performance substantially. A major contribution of this research is that knowledge of the friction's form is used to determine the neural network's structure. This unique approach solves network sizing and weight initializing problems. The friction model is used for feed-forward decoupling of friction-induced torque. The neural network also explicitly incorporates inertia compensation and linear feedback control. It can thus be readily initialized to perform identically to an existing controller. Adaptation to enhance performance can then proceed from that point. This solves the problem of providing good control in the early stages of adaptating the network's weights. Another contribution of this research is a demonstration of the trajectory dependence of static friction compensation with a discrete time controller. A hypothesis to explain this trajectory-dependent behavior is proposed. The paper includes both theoretical formulation and practical implementation results applied to control of a commercial d.c. motor having a significant amount of static friction. © IEEE.

关键词： Neural networks

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A Method for the Local Incorporation of Er3+into LiNDO3Guided Wave Optic Devices by Ti Co-diffusion

A Method for the Local Incorporation of Er3+into LiNDO3Guide...

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Integrated Photonics Research, IPR 1992

作者： Gill, D.M. McCaughan, L. Materials Science Program Department of Electrical and Computer Engineering University of Wisconsin MadisonWI53706 United States

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An interconnect technology for high density multichip systems 35

An interconnect technology for high density multichip system...

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35th Midwest Symposium on Circuits and Systems, MWSCAS 1992

作者： Jaafar, Maha A. S. Bajikar, Sateesh Denton, Denice D. Department of Electrical and Computer Engineering and Materials Science Program University of Wisconsin-Madison MadisonWI53706 United States

ISBN: (纸本)0780305108

This paper describes an interconnect technology used for high density multichip systems. The process involves the electroplating of through-holes in silicon (Si) substrates. These metallized holes act as interconnects between the levels of a three-dimensional multichip system. This method has the advantages of minimizing both system area and the delay times between chips. © 1992 IEEE.

关键词： Integrated circuit interconnects

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Molecular Beam Epitaxy Growth and Structural Characterization of Si/GaAs Superlattices

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MRS Online Proceedings Library 1992年第1期263卷 65-70页

作者： R.J. Matyi H.J. Gillespie G.E. Crook J.K. Wade Dept. of Materials Science and Engineering USA Materials Science Program University of Wisconsin Madison Dept. of Electrical and Computer Engineering USA

The growth of high quality Si/GaAs superlattices on GaAs substrates using molecular beam epitaxy is described. A typical superlattice structure consisted of ten periods of thin (<5Å) layers of pseudomorphic silicon alternating with thick GaAs layers; typical GaAs thicknesses range from 100Å to 1850Å. In situ reflection high energy electron diffraction analysis of the structures during growth showed the silicon layers developed a (3 × 1) reconstruction, while the GaAs exhibited a (4×)→(3×)→(3×1)→(2×4) reconstruction sequence. Both observations agree with prior studies of the growth of embedded silicon in GaAs/Si/GaAs heterostructures. X-ray diffraction using the (004) reflection showed sharp and intense satellite peaks (out to 22 orders in one case), indicating a high level of structural quality. Very good agreement has been obtained between observed diffraction patterns and those calculated via dynamical simulation.

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Minimization of acoustic noise in variable speed motors using modified pulse width modulation (PWM) Drives 7

Minimization of acoustic noise in variable speed motors usin...

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7th Annual Applied Power Electronics Conference and Exposition, APEC 1992

作者： Garcia-Otero, Singli Devaney, Michael Cooperative Developmental Energy Program Fort Valley State College Fort ValleyGA31030 United States Department of Electrical and Computer Engineering University of Missouri-Columbia ColumbiaMO65211 United States

ISBN: (纸本)0780304853

This paper describes an effective way of reducing acoustic noise in a motor supplied from an adjustable speed PWM drive. The PWM patterns are selected to eliminate the most acoustically sensitive harmonics in the motor's vibration spectra. This permits the PWM drive to use more economical yet slower switching devices while maintaining quiet operation. © 1992 IEEE.

关键词： Acoustic noise

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