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IEEE International Symposium on Circuits and Systems (ISCAS)

作者： Chung-Neng Wang Tihao Chiang Chi-Min Liu Hung-Ju Lee Currently a Professor of the Department and Institute of Computer Science and Information Engineering NCTU Taiwan Currently an Assistant Professor of the Department and Institute of Electronics Engineermg NCTU Taiwan Mediasoft Laboratory Sony US Research Laboratories San Jose USA

ISBN: (纸本)0780366859

MPEG-4 Visual Texture Coding (VTC) was recently adopted as an image coding technique using a wavelet-based approach. For images with significant texture and sharp contrast, MPEG-4 VTC spreads the signal energy over several wavelet trees. To improve the coding efficiency of zerotree entropy coding, we propose a double transformation coding (DTC) approach. The wavelet trees are reorganized as a sequence of wavelet blocks, which are categorized into four groups where the similarity among the blocks within a group is increased. For each class, we use an adaptive Karhunen Loeve Transform (KLT) bases to predict the quantized AC coefficients of the same class. The classification process is based on the variances of the quantized DC coefficients considering the spatial orientation. Thus, the classification information can be computed at the decoder. At the same time, the property of continuous scalability is maintained using the new approach. For the same bitrate we found that the DTC achieved a coding gain over MPEG-4 VTC by about 0.5-1.0 dB in PSNR.

关键词： MPEG 4 Standard Transform coding Frequency Discrete wavelet transforms Laboratories Image coding Wavelet coefficients Entropy coding Wavelet transforms Decoding

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Neural network based algorithm for dynamic system optimization

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Asian Journal of Control 2001年第2期3卷 131-142页

作者： Romero, R.F. Kacprzyk, J. Gomide, F. USP-ICMC-SCE 13560–970-São Carlos-SP-Brasil. Roseli Aparecida Francelin Romero:received her Ph.D. degree in electrical engineering from the University of Campinas Brazil in 1993. From 1983 to 1988 she was a lecturer at the university Julio de Mesquita Filho (UNESP). Since abril of 1988 she is an Assistant Professor in the Department of Computer Science at the University of Sao Paulo. From 1996 to 1998 she was a Visiting Scientist Carnegie Mellon's Robot Learning Lab. Her research interests include artificial neural networks machine learning techniques and fuzzy logic. Dr. Romero is a member of the IEEE and of the Computer Brazilian Society (SBC). SRI-Polish Academy of Sciences 01–447-Warsaw-Poland-PL. UNICAMP-FEE-DCA 13081-Campinas-SP-Brasil.

A class of artificial neural networks with a two-layer feedback topology to solve nonlinear discrete dynamic optimization problems is developed. Generalized recurrent neuron models are introduced. A direct method to assign the weights of neural networks is presented. The method is based on Bellmann's Optimality Principle and on the interchange of information which occurs during the synaptic chemical processing among neurons. A comparative analysis of the computational requirements is made. The analysis shows advantages of this approach as compared to the standard dynamic programming algorithm. The technique has been applied to several important optimization problems, such as shortest path and control optimal problems.

关键词： Optimization

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Hydroelastic considerations in ship panel design

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NAVAL ENGINEERS JOURNAL 1997年第5期109卷 61-66页

作者： McCormick, ME Bhattacharyya, R Mouring, SE Dr. Michael E. McCormick:is a research professor of civil engineering at The Johns Hopkins University. Before joining the Hopkins faculty in 1994 he was a professor of ocean engineering for twenty-five years at the U.S. Naval Academy. In addition he has held full-time faculty positions at Swarthmore College Trinity College (Hartford) and the Catholic University of America. He was also a hydrodynamicist at the David Taylor Model Basin for more than four years. Prof. McCormick received his undergraduate degree in mathematics and physics from AmericanUniversity a masters degree in applied mechanics and a Ph.D. in mechanical engineering from Catholic University a Ph.D. in civil engineering and a Sc.D. in engineering science from Trinity College in Dublin Ireland. He has over 100 publications including two books in the areas of ocean engineering wave mechanics and ocean wave energy conversion. He has also edited two books dealing with ocean engineering. In addition he is co-editor of both the journal Ocean Engineering and the Elsevier book series in ocean engineering. Dr. Rameswar Bhattacharyya:is professor of naval architecture at the U.S. Naval Academy where he has served for twenty-six years and adjunct professor of mechanical engineering at The Johns Hopkins University. Prior to joining the Naval Academy faculty he was a faculty member in the Department of Naval Architecture and Marine Engineering at the University of Michigan. His research experience includes ten years at both the Lubecker Flender-Werke and the Hamburg Ship Model Basin in Germany. His research has led to numerous publications including two books one in the area of ship dynamics and the other in the area of computer-aided ship design. Prof. Bhattacharyya received his undergraduate degree in naval architecture from the Indian Institute of Technology and his doctorate in engineering from the Technical University of Hanover Germany. In addition he holds an honorary doctorate from the University of Veracruz. With Prof. McCormick he co

Panels and all other structural components of surface ships and submarines vibrate when the vessel is underway. The vibratory motions are primarily excited by the power plant. At operational (design) speeds, panels vibrate in their fundamental modes and those associated with their higher harmonic frequencies. The panel motions have rather well-defined energy spectra, which depend on both the structural design, position of the panel and the rotational speed of the single or multiple power plants. The panel motions will interact with the vortices in the adjacent turbulent boundary layer. The interaction can result in either an increase in the frictional drag or a decrease. Because of this, the argument is made that the designs of the panels and their support systems should include considerations of this hydroelastic effect.

关键词： Naval architecture

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Hot methanol extraction for the analysis of volatile organic chemicals in subsurface core samples from Dover Air Force Base, Delaware

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GROUND WATER MONITORING AND REMEDIATION 1997年第1期17卷 104-121页

作者： Ball, WP Xia, G Durfee, DP Wilson, RD Brown, MJ Mackay, DM William P. Ball is an assistant professor in the Department of Geography and environmental engineering at Johns Hopkins University (313 Ames Hall 3400 N. Charles St. Baltimore MD 21218). His research interests are in the physical and chemical processes that control contaminant fate in aqueous systems both in the natural environment and in engineered processes of treatment and remediation. Recent work has included both laboratory and computer modeling studies related to contaminant fate and transport in subsurface environments. Ball holds M.S. and Ph.D. degrees in environmental engineering and science from Stanford University and a B.S. degree in civil engineering from the University of Virginia. He is a registered pro-fessional engineer in the state of Virginia. Guoshou Xia is a Ph.D. candidate at Johns Hopkins University He was previously a lecturer in the Department of Civil Engineering at Southeast University in China. He received his B.S. degree in chemistry from Hefei University and his M.S. degree in environmental engineering from East China University of Chemical Technology. His current research interests are in the area ofsubsurface contaminant transport with emphasis on better understanding the nature of organic contaminant interactions with subsurface solids. Donald P. Durfee received his M.S. degree in environmental engineering from Johns Hopkins University in 1993 and is currently a Ph.D. student at Johns Hopkins. He is studying contaminant fate and transport in the subsurface and is also interested in site characterization and remediation issues. Ryan D. Wilson is a research associate and Ph.D. student in the Department of Earth Sciences at the University of Waterloo Waterloo Ontario. His research interests include field and modeling studies of semipassive remediation technologies and the behavior of gaseous tracers. Wilson received his B.Sc. in geology from the University of Alberta in 1987 and his M.Sc. in earth sciences (hydrogeology) from the University of Waterloo in 1993. Michael J. Br

The evaluation of contaminant concentrations in ground water and soil is an essential aspect of most hazardous waste remedial investigations. This paper describes methods applied toward obtaining, preserving, and analyzing subsurface samples for the determination of VOC concentrations in the saturated region of an unconfined coastal plain aquifer at Dover Air Force Base (DAFB), Delaware. The described protocol involved headspace-free subsampling of cores, field preservation of subsamples in methanol, and overnight extraction of the VOCs at elevated temperature (70 degrees C). Methanol-extracted compounds were subsequently transferred to hexane and analyzed by gas chromatography. The method was found to achieve quantitative extraction from the aquifer sands in a single step, although extraction from fine-grained and more strongly sorbing aquitard samples required multiple methanol extractions to achieve comparable recovery. An extensive set of DAFB results is presented as an indication of how these methods can be applied toward characterizing field-scale contamination with a high degree of resolution and accuracy. These data have enabled a quantitative estimate of the contaminant distribution at this site and offer valuable insight into processes of contaminant migration into the underlying aquitard. In these regards, the methods used are believed to have provided much more accurate results than could have been obtained using more commonly applied techniques.

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Development of the iPOINT Testbed for Optoelectronic Asynchronous Transfer Mode Networking

Development of the iPOINT Testbed for Optoelectronic Asynchr...

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1996 International Conference on Information Infrastructure(ICII’96)

作者： John W Lockwood Sung Mo Kang Stephen G.Bishop Haoran Duan Ashfaq Hossain Visiting Assistant Professor of Electrical and Computer Engineering The University of Illinois at Urbana-Champaign 405 North Mathews Avenue Urbana IL 61801USA Department Head of Electrical and Computer Engineering The University of Illinois at Urbana-Champaign 405 North Mathews Avenue Urbana IL 61801USA Director of the Center for Compound Semiconductor Microelectronics The University of Illinois at Urbana-Champaign 405 North Mathews Avenue Urbana IL 61801USA candidate in Electrical and Computer Engineering The University of Illinois at Urbana-Champaign 405 North Mathews Avenue Urbana IL 61801USA candidate in Computer Science The University of Illinois at Urbana-Champaign 405 North Mathews Avenue Urbana IL 61801USA

＜正＞Asynchronous Transfer Mode（ATM）technology will be used to build Internet backbones and within local-area networks to interconnect personal computers and workstations running network-intensive *** such as the World Wide Web（WWW）,desktop video conferencing, distributed computing,network file systems,and remote access to supercomputing resources have dramatically increased the demand for bandwidth in current *** networks must scale in bandwidth as the computational power of the desktop computer as well as the number of installed computer systems continues to grow exponentially. The Illinois Pulsar-based Interconnection（iPOINT）testbed has been established to desjgn and develop scalable ATM switch architectures,explore multicast scheduUng algorithms to enable one- to-many data delivery,and investigate new techniques for data queuing,Within this testbed,Field Programmable Gate Array（FPGA）technologies have been used to prototype the core logic of the ATM switch,scheduler,and queue *** coniunction of the UIUC microelectronics laboratory,low-cost optoelectronic components have been developed and inserted into the testbed. As a part of the computer science research,an MPEG/JPEG video server and clint has been developed and operates on this fully functional testbed.

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PROGRAM VIEW GENERATION AND CHANGE ANALYSIS USING ATTRIBUTED DEPENDENCY GRAPHS

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JOURNAL OF SOFTWARE MAINTENANCE-RESEARCH AND PRACTICE 1995年第4期7卷 239-261页

作者： ALZOUBI, R PRAKASH, A Software Systems Research Laboratory Department of Electrical Engineering and Computer Science University of Michigan Ann Arbor MI 48109-2122 U.S.A. He is currently an Assistant Professor at Yarmouk University Irbed H.K. of Jordan. Earlier he has worked for the Ford Motor Company in Dearborn Michigan. His research interests are in the area of software engineering. Since 1989 he has been with the Department of Electrical Engineering and Computer Science at the University of Michigan Ann Arbor where he is currently an Associate Professor. His research interests include software engineering and computer-supported cooperative work. He is a member of the ACM and the IEEE Computer Society.

Software maintenance is usually the most expensive phase of the software life-cycle, Program understanding and impact-of-change analysis are two of the major activities during this phase, In this paper, we describe attributed program dependency graphs (APDGs), a model to store information derived from the program source code and ease construction of tools for software maintenance, We show how the model can be used for interactive view generation and doing two kinds of impact-of-change analysis-incremental and comparison-oriented. Incremental change analysis uses APDGs and a Rule Base to provide a way for the user to analysis the effect of proposed well-defined changes, Comparison-oriented change analysis allows a user to generate structural semantic differences between two versions of a subsystem after an arbitrary sequence of changes, We also introduce SCAN, a prototype collection of loosely integrated tools based on the APDG model and describe our experiences with the system.

关键词： PROGRAM REPRESENTATION DEPENDENCY GRAPHS PROGRAM UNDERSTANDING REVERSE-engineering REengineering IMPACT ANALYSIS CHANGE ANALYSIS

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Technology and manning for safe ship operations

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NAVAL ENGINEERS JOURNAL 1995年第6期107卷 79-84页

作者： Wilson, MB Pollard, ME Marc B. Wilson D.Sc. C.P.E.:is an Assistant Professor in the School of Aviation and Transportation at Dowling College. Since July 1994 Professor Wilson has been developing the human factors curriculum and laboratory. Prior to becoming a member of the Dowling faculty Dr. Wilson was a senior marine safety inspector for the U.S. Coast Guard. He was instrumental in establishing a Human Factors Marine Safety Plan. He is a retired Coast Guard Officer. Dr. Wilson is a member of the Human Factors & Ergonomic Society Transportation Research Forum American Society of Engineering Managers American Society of Naval Engineers and the Society of Naval Architects and Marine Engineers. He is a CG licensed First Assistant Engineer an FAA Certified Flight Instructor-Instrument Airplane and Certified Professional Ergonomist. Michael E. Pollard:is currently President of Chevy Chase Technology Corporation a computer systems engineering firm located in Chevy Chase Maryland. Mr. Pollard graduated from Brandeis University in 1990 and served as a legislative assistant in the U.S. Senate concentrating on science and technology issues until early 1995. This article marks Mr. PollaRD's seventh publication in the field of science and technology.

Current technology centric U.S. maritime manning reduction trends have led both the maritime industry and government policy makers to revisit the safety issue. This paper identifies the manning processes, examines, and assesses process boundaries, and evaluates relevant safety issues. This examination finds that ample opportunities exist for both improved ship safety and proper business process re-engineering, but that current applications of technology will yield dangerous results unless human factors or ergonomics is included.

关键词： Personnel

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OPTIMUM FREQUENCY REUSE IN MOBILE TELEPHONY SYSTEMS

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INTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS 1995年第3期8卷 185-190页

作者： KAZANTZAKIS, MG DEMESTICHAS, PP ANAGNOSTOU, ME National Technical University of Athens Computer Science Division Department of Electrical and Computer Engineering Heroon Polytechneiou 9 Zografou Athens 15773 Greece Michael G. Kazantzakii was born in Athens Greece in 1962. He received both the Diploma and Ph.D. Degree from the Electrical Engineering Department of the National Technical University of Athens in 1986 and 1992 respectively. During the period 1992–1993 he was a member of the Staff of the Hellenic Navy Research Centre working in the area of underwater acoustics. Since 1994 he has been a researcher at the National Technical University of Athens Department of Electrical Engineering and Computer Science Telecommunications Laboratory. His interests include data mobile and integrated services networks. Panagiotis P. Demestichas was born in Athens Greece in 1967. He received the Diploma in electrical engineering from the National Technical University of Athens (NTUA) Athens in 1993. At present he is a research assistant at NTUA working towards his Ph.D. dissertation. He participated in the BRITE/EURAM-EURATN and in the RACE-TOMQAT and MONET projects. His research interests are in the areas of broadband and mobile networks queueing theory algorithms and complexity theory. He is a Member of the Technical Chamber of Greece. Miltiades E. Anagnostou was born in Athens in 1958. He received the Electrical Engineers Diploma from the National Technical University of Athens (NTUA) in 1981. During the period 1981–1987 he was a teaching assistant at NTUA. In 1987 he received his Ph.D. in the area of computer networks. In 1987–1989 he served the Greek army in the Air Force Research and Development Center. In 1989–1991 he was a Lecturer and since 1991 he has been an Assistant Professor in the Computer Science Division Department of Electrical and Computer Engineering of the NTUA. He teaches courses on modern telecommunications formal specification of protocols stochastic processes and queueing theory. Since 1981 Dr. Anagnostou has been involved

The reason why cellular mobile telephony systems exist is that they allow frequency reuse. Dynamic allocation algorithms improve the network efficiency and the service quality. Dynamic allocation is closely related to the following instantaneous allocation problem: given a number of channels (frequencies), a cell structure and the number of calls to be accommodated in each cell, find the optimum allocation of channels to cells subject to restrictions concerning the distance of cells, where the same frequency can be reused. In this paper we formulate and solve this problem by showing that it can be reduced to a 0-1 programming problem. Finally we present results, and draw subsequent conclusions.

关键词： MOBILE TELEPHONY FREQUENCY ALLOCATION UMTS

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Use of artificial neural networks: predicting trickling filter performance in a municipal wastewater treatment plant

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Environmental Management and Health 1995年第2期6卷

作者： Hao‐Che Pu Yung‐Tse Hung Assistant Professor of Computer Science Computer and Information Science Department Cleveland State University Cleveland Ohio USA Professor of Civil Engineering Civil Engineering Department Cleveland State University Cleveland Ohio USA

Artificial neural networks (ANN) are used as an alternativefunction approximation tool for predicting the performance of tricklingfilter treatment process in a municipal wastewater treatment plant,Solon, Ohio, USA, which uses a trickling filter followed by an activatedsludge process. The treatment plant had an average monthly inflow flowrate of 2.92 mgd (million gallons per day). The average raw, settled,and final BOD (biochemical oxygen demand) was 449, 235 and 4.8 mg/l,respectively, while the corresponding value for TSS (total suspendedsolids) was 296, 131, and 6.1 mg/l. The overall removal efficiency forBOD and TSS was 98.93 per cent and 97.95 per cent respectively. The bestANN model for predicting the trickling filter effluent BOD and TSS has aprediction error of 31.45 per cent and 32.54 per cent respectively. Thenumber of input variables, as well as number of nodes in hidden layerseemed not to have a definite effect on the prediction error for the ANNmodel. The prediction errors obtained with ANN models were lower thanthose obtained by multiple regression analysis.

关键词： Environment Modelling Multiple regression analysis Neural networks Solon Wasteworks Treatment Plant Statistics Waste

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ISDN LOOP EXTENSION USING A MID-SPAN AMPLIFIER

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INTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS 1995年第3期8卷 219-224页

作者： ERKER, GJ DODDS, DE KRZYMIEN, WA David E. Dodds was born in Saskatoon Canada in 1945. He received the B. Eng. and MSc. degrees from the University of Saskatchewan in 1966 and 1968 respectively. He worked with Bell Northern Research (Ottawa) on PBX design in 1969 1972 and 1978. Since 1969 he has been with the University of Saskatchewan where he is currently Professor of Electrical Engineering. He teaches courses in electronics and communications and also presents short courses on the fundamentals of telephony. Current research interests are in data transmission signal processing architecture and frame synchronization for PCM and spread spectrum systems. He has been granted five patents relating to commercial products in delta-modulation telephone line interfacing and computer data transmission. In 1986 he was on sabbatical leave at BNR Inc. and worked with an ANSI committee on the standardization of FDDI-II a combined voice and data system. Mr. Dodds is a Registered Consulting Engineer in Saskatchewan. Witold A. Krzyden received his MSc. (Eng.) and Ph.D. degrees (both in Electrical Engineering) in 1970 and 1978 respectively from the Poznan Technical University in Poznan Poland. He was awarded the Minister's of Science and Technology Prize of Excellence for his Ph.D. thesis. From 1970 to 1978 he was a Research Engineer and Teaching Assistant and then from 1978 to 1980 an Assistant Professor of Electrical Engineering at the Poznan Technical University. In 1980 he won a Dutch Government Research Fellowship at the Twente University of Technology in Enschede the Netherlands for the year of 1980/1981. In the following year of 1981/82 he was a Research Assistant Professor there. From 1982 to 1986 he was an Assistant Professor of Electrical Engineering at Lakehead University in Thunder Bay Ontario Canada. In 1986 he joined the Univeristy of Alberta and Alberta Telecommunications Research Centre (now Telecommunications Research Laboratories or TRLabs) as an Associate Professor of Electrical Engineering. Currently he is a Professor of E

The 5.5 km range of the basic rate ISDN loop has been extended by using a negative impedance amplifier and by using a 2 wire/4 wire (2w/4w) amplifier. The negative impedance amplifier extends the range of the loop by 1.0 km, whereas the 2w/4w amplifier extends the range by 1.5 km at the expense of increased complexity. As part of the amplifer design, a resistor/capacitor network has been developed which closely matches the characteristic impedance of telephone cable. Error rate tests have been conducted using various lengths of cable and an operating ISDN line.

关键词： ISDN PHYSICAL LAYER BASIC RATE LOOP RANGE EXTENSION

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