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International Joint Conference on Neural Networks (IJCNN)

作者： G.G. Lendaris T.T. Shannon A. Rustan Systems Science Ph.D. Program and Electrical & Computer Engineering Department Portland State University USA

A variety of alternate training strategies for implementing the dual heuristic programming (DHP) method of approximate dynamic programming in the neurocontrol context are explored. The DHP method of controller training has been successfully demonstrated by a number of authors on a variety of control problems in recent years, but no unified view of the implementation details of the method has yet emerged. A number of options are described for sequencing the training of the controller and critic networks in DHP implementations. Results are given about their relative efficiency and the quality of the resulting controllers for two benchmark control problems.

关键词： Neural networks Shape control Dynamic programming Equations Design optimization Amorphous materials Design methodology Feedback loop Supervised learning Process design

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A return to collegiality in Criteria 2000 visits

A return to collegiality in Criteria 2000 visits

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Frontiers in Education (FIE) Conference

作者： F.F. Driscoll B.A. Karanian R. Villanucci S. Kerns Electromechanical Engineering Program Wentworth Institute of Technology Boston MA USA Electrical and Computer Engineering Vanderbilt University Nashville TN USA

engineering Criteria 2000 require open and clear exchange between ABET evaluators and the administrators and program facility seeking evaluation. The Criteria encourage innovations in both programs and leadership by providing the opportunity and responsibility for defining unique program objectives. Under engineering Criteria 2000, evaluators are charged to accept these program-specific objectives and to determine whether programs meet their stated goals, a process quite different from the application of pre-determined criteria. This new accreditation process necessitates enhanced communication between program representatives and evaluators. This paper provides a view of the evaluation process from several perspectives. A new Electromechanical engineering program, evaluated in the fall of 1998, is the focus of several points of view; the chairperson of the program, program faculty, program students, and an EAC evaluator. The effect of Criteria 2000 on program processes, the steps required for visit preparation and for the visit itself; and the post-visit effects of constructive feedback from ABET evaluators are detailed. The ways in which novel programs are fostered and encouraged by Criteria 2000 receives particular emphasis. program administrator evaluator faculty and student perspectives of the accreditation process experience are illustrated. While new program evaluations are especially challenging for all concerned, evaluator and program participants alike can find Criteria 2000 evaluations opportunities for discovering ways to improve engineering education.

关键词： Accreditation History Educational institutions Knowledge engineering Mechanical engineering Levee engineering education Speech Government electrical engineering

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A HIGH-RESOLUTION TIME-FREQUENCY ANALYSIS OF THE SINGING VOICE

A HIGH-RESOLUTION TIME-FREQUENCY ANALYSIS OF THE SINGING VOI...

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1999 International Workshop on Models and Analysis of Vocal Emissions for Biomedical Applications, MAVEBA 1999

作者： Mellody, Maureen Wakefield, Gregory H. Applied Physics Program 500 East University Dr. Ann ArborMI48109-1120 United States Department of Electrical Engineering and Computer Science University of Michigan 1301 Beat Ave. Ann ArborMI48109-2122 United States

We apply the modal distribution, a high-resolution time-frequency distribution, to the study of sung musical passages. Evidence is presented comparing the modal distribution with the spectrogram for a set of synthetic signals which emulate human singing. We then compare the two techniques for sung passages from four student sopranos with respect to measures of the instantaneous frequency and amplitude of the partials. In general, the modal distribution appears to be a more sensitive measure of individual differences in vocal production than the spectrogram. © 1999 Models and Analysis of Vocal Emissions for Biomedical Applications, MAVEBA 1999. All rights reserved.

关键词： Modal analysis

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Integrated real time multi-channel wavelength monitoring circuit using phased-array waveguide grating

Integrated real time multi-channel wavelength monitoring cir...

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Optical Fiber Communication (OFC) Conference

作者： Shan Zhong Chau-Han Lee Xiao Lin Xiao-Hui Yang Yung-Jui Chen D. Stone Department of Computer Science and Electrical Engineering And Joint Program for Advanced Electronic Materials University of Maryland Baltimore County Baltimore MD USA

An integrated multichannel wavelength monitoring circuit using specially designed phased-array waveguide grating and detector arrays, which monitors all wavelength-division multiplexing channels in real-time (sixteen ... 详细信息

ISBN: (纸本)155752582X

关键词： Circuits Gratings Wavelength division multiplexing Throughput computerized monitoring Phased arrays Wavelength measurement Detectors Sensor arrays computer science

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Performance of Turbo Trellis-Coded Modulation (T-TCM) on frequency-selective rayleigh fading channels

Performance of Turbo Trellis-Coded Modulation (T-TCM) on fre...

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1999 IEEE International Conference on Communications, ICC 1999

作者： Ha, Nguyen Hoang Rajatheva, R.M.A.P. Department of Electrical and Computer Engineering University of Manitoba WinnipegMBR3T 5V6 Canada Telecommunication Program School of Advanced Technologies Asian Institute of Technology P.O Box 4 Pathumthani12120 Thailand

ISBN: (纸本)078035284X

Turbo Trellis-Coded Modulation (T-TCM) is one of several techniques for combining turbo codes with multilevel modulation in order to save the bandwidth of the transmission systems. T-TCM was shown to perform very well on AWGN channel, but its performance over frequency-selective fading channel is still unknown. In this paper, a system model to investigate the performance of T-TCM schemes over frequency-selective fading channel is proposed. Simulation results show that when appropriate receiver is available, T-TCM also performs well on frequency-selective fading channels. T-TCM performance is much better than any other coded-modulation scheme in the past for this type of channel. © 1999 IEEE.

关键词： Turbo codes

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Robust H/sub /spl infin// filtering design with pole constraints for discrete-time systems: an LMI approach

Robust H/sub /spl infin// filtering design with pole constra...

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American Control Conference (ACC)

作者： R.M. Palhares P.L.D. Peres Graduate Program in Electrical Engineering Ponificia Universidade Católica de Mines Gerais Belo Horizonte Minas Gerais Brazil DT-School of Electrical and Computer Engineering State University of Campinas-UNICAMP Sao Paulo Brazil

The problem of full order guaranteed cost H/sub /spl infin// filtering design for discrete-time systems with polytope type uncertainty is investigated. The main purpose is to obtain a stable linear filter such that the filtering error system remains quadratically stable within a prespecified H/sub /spl infin// attenuation level. Necessary and sufficient conditions for the existence of such robust filter are provided in terms of linear matrix inequalities (LMIs), which can be efficiently solved by means of high performance convex optimization procedures with global convergence assured. Moreover, as an improvement, the filter dynamics can be constrained to some specific regions inside the unit open disk.

关键词： Robustness Nonlinear filters Riccati equations Attenuation Filtering theory Electronic mail White noise Robust control Uncertainty Output feedback

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Recent results from the National Transparent Optical Network (NTON)

Recent results from the National Transparent Optical Network...

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IEEE Photonics Conference (IPC)

作者： H. Feng R.L. Thombley W.J. Lennon J.P. Heritage Advanced Telecommunications Program Lawrence Livemore National Laboratory Livermore CA USA Department of Electrical and Computer Engineering University of California Davis CA USA

The National Transparent Optical Network (NTON) is co-funded by the Defense Advanced Research Projects Agency (DARPA) and the National Transparent Optical Network Consortium (NTONC). Members of the NTONC include Nortel Networks, GST Telecommunications, Lawrence Livermore National Laboratories (LLNL), Sprint Communications and the Bay Area Rapid Transit District (BART). NTON provides a 10+ Gb/s open research platform for Next Generation Internet (NGI) trials. NTON is a 2000 km 10-20 Gb/s wavelength division multiplexed (WDM) network deployed using in-place commercial fiber. NTON links reach government, university and private sector labs and provide the ability to interface with most of the broadband research networks in the US. Planned interchange networks are: ATDnet, HSCC, DREN, NREN, ESnet, vBNS, SVTT, Abilene, Canarie, CalREN, and others. NTON will simultaneously support device design R&D, network R&D and testing of high bandwidth enabled applications. NTON provides direct access to nearly all of the major universities on the West Coast at data rates up to, and potentially beyond, 2.5 Gb/s. NTON will also connect major West Coast supercomputer sites, digital libraries, high energy physics labs and medical research institutions.

关键词： Optical fiber networks Wavelength division multiplexing Laboratories Internet WDM networks Optical fiber communication Optical fiber devices US Government Testing Bandwidth

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Performance of turbo trellis-coded modulation (T-TCM) on frequency-selective Rayleigh fading channels

Performance of turbo trellis-coded modulation (T-TCM) on fre...

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IEEE International Conference on Communications (ICC)

作者： Hguye Hoang Ha R.M.A.P. Rajatheva Department of Electrical and Computer Engineering University of Manitoba Winnipeg MAN Canada Telecommunication Program School of Advanced Technologies Asian Institute of Technology Pathum Thani Thailand

Turbo trellis-coded modulation (T-TCM) is one of several techniques for combining turbo codes with multilevel modulation in order to save the bandwidth of the transmission systems. T-TCM was shown to perform very well on AWGN channels, but its performance over frequency-selective fading channels is unknown. In this paper, a system model to investigate the performance of T-TCM schemes over frequency-selective fading channels is proposed. Simulation results show that when an appropriate receiver is available, T-TCM also performs well on frequency-selective fading channels. T-TCM performance is much better than any other coded-modulation scheme for this type of channel.

关键词： Frequency modulation Fading Turbo codes Modulation coding Iterative decoding Bandwidth AWGN channels Bit error rate Filters Iterative algorithms

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Robust filtering with guaranteed energy-to-peak performance — an LMI approach

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IFAC Proceedings Volumes 1999年第2期32卷 1814-1819页

作者： Reinaldo M. Palhares Pedro L.D. Peres Pontifícia Universidade Católica de Minus Gerais Graduate Program in Electrical Engineering Av. Dom José Gaspar 500 Prédio 4 30535-610 Belo Hotizonte - MG - Brazil School of Electrical and Computer Engineering University of Campinas DT/FEEC/UNICAMP - CP 6101 13.081-970 Campinas - SP - Brazil

The problem of robust energy-to-peak filtering for linear systems with convex bounded uncertainties is investigated in this paper. The main purpose is to design a full order stable linear filter that minimizes the worst-case peak value of the filtering error output signal with respect to all bounded energy inputs, in such way that the filtering error system remains quadratically stable Necessary and sufficient conditions arc formulated in terms of Linear Matrix Inequalities - LMIs, for both continuous- and discrete-time cases.

关键词： Robust Estimation Filter Design Uncertain Linear Systems Convex programming Energy-to-Peak Gain Linear- Matrix Inequalities

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Proximal femoral density patterns are consistent with bicentric joint loads

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computer Methods in Biomechanics and Biomedical engineering 1999年第4期2卷 271-283页

作者： Fischer, Kenneth J. Jacobs, Christopher R. Levenston, Marc E. Cody, Dianna D. Carters, Dennis R. Musculoskeletal Research Center Department of Orthopaedic Surgery University of Pittsburgh Pittsburgh PA 15213 United States Department of Orthopaedics Musculoskeletal Research Laboratory Pennsylvania State University School of Medicine Hershey PA 17033 United States Department of Electrical Engineering and Computer Science Continuum Elect romechanics Mhoratory Massachusetts Institute of Technology Hershey MA 02139 United States Department of Diagnostic Radiology Division of Radiologic Physics and Engineering Henry Ford Hospital Detroit MI 48202 United States Department of Veterans Affairs Medical Center Rehabilitation Research and Development Center Palo Alto CA 94304-1200 United States Department of Mechanical Engineering Stanford University Biomechanical Engineering Program Stanford CA 94305-402 United States

We developed an alternate method for density-based load estimation and applied it to estimate hip joint load distributions for two femora. Two-dimensional finite element models were constructed from single energy quantitative computed tomography (QCT) data. Load estimation was performed using five loading regions on the femoral head. Within each loading region, individual nodal loads, normal to the local surface, were supplied as input to the load estimation. An optimization procedure independently adjusted individual nodal load magnitudes in each region, and the magnitudes of muscle forces on the greater trochanter, such that the applied tissue stimulus approached the reference stimulus throughout the model. Dominant estimated load resultant directions were generally consistent with published experimental data for loads during gait. The estimated loads also suggested that loads near the extremes of the articulating surface may be important (even required) for development and maintenance of normal bone architecture. Estimated load distributions within nearly all regions predicted bicentric loading patterns, which are consistent with observations of hip joint incongruity. Remodeling simulations with the estimated loads predicted density distributions with features qualitatively similar to the QCT data sets. This study illustrates how applications of density-based bone load estimation can improve understanding of dominant loading patterns in other bones and joints. The prediction of bicentric loading suggests a very fine level of local adaptation to details of joint loading. © 1999 OPA (Overseas Publishers Association) N.V.

关键词： Finite element method

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