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International Conference on Com.utational Intelligence and m.ltim.dia Applications

作者： P.S. Hirem.th Prem. T. Akkasaligar Sharan Badiger Department of P.G. Studies & Research in Computer Science Gulbarga University Gulbarga Karnataka India Engineering College B.L.D.E.A's Dr P.G.H. Bijapur Karnataka India Departmentof Medicine Sri B. M. Patil Medical College Bijapur Karnataka India

The m.jor difficulty concerning echocardiograph im.ge processing is speckle noise. In this paper, we present wavelet based algorithm.for denoising echocardiograph im.ges and then determ.ne an optim.l wavelet filter that yields good quality im.ges. The log transform.d input is represented in m.ltiscale wavelet dom.in. Global hard thresholding of subband coefficients is perform.d to achieve lossy com.ression of im.ge. The inverse wavelet transform.d im.ge is free from.speckle noise. The im.ge quality is assessed in term. of objective and statistical m.asures, nam.ly, peak-signal-to-noise ratio (PSNR), com.ression ratio, variance, m.an square error (m.E). The experim.nts are perform.d using different wavelets at various levels of decom.osition. The results show that bior6.8 with 2- level decom.osition yields better quality despeckled im.ges.

关键词： Filters Im.ge quality Speckle Im.ge coding PSNR Im.ge reconstruction Biom.dical im.ging Noise reduction Educational institutions Wavelet dom.in

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TRACKING CONTROL IN THE PRESENCE OF NONLINEAR DYNAm.C FRICTIONAL EFFECTS: ROBOT EXTENSION

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Asian Journal of Control 2008年第3期1卷

作者： m. Feem.ter D.m. Dawson A. Behal W. Dixon Matthew Feemster received the B.S degree in Electrical Engineering from Clemson University Clemson South Carolina in December 1994. Upon graduation he remained at Clemson University and received the M.S. degree in Electrical Engineering in 1997. During this time he also served as a research/teaching assistant. His research work focused on the design and implementation of various nonlinear control algorithms with emphasis on the induction motor and mechanical systems with friction present. He is currently working toward his Ph.D. degree in Electrical Engineering at Clemson University. Darren M. Dawson was born in 1962 in Macon Georgia. He received an Associate Degree in Mathematics from Macon Junior College in 1982 and a B.S. Degree in Electrical Engineering from the Georgia Institute of Technology in 1984. He then worked for Westinghouse as a control engineer from 1985 to 1987. In 1987 he returned to the Georgia Institute of Technology where he received the Ph.D. Degree in Electrical Engineering in March 1990. During this time he also served as a research/teaching assistant. In July 1990 he joined the Electrical and Computer Engineering Department and the Center for Advanced Manufacturing (CAM) at Clemson University where he currently holds the position of Professor. Under the CAM director's supervision he currently leads the Robotics and Manufacturing Automation Laboratory which is jointly operated by the Electrical and Mechanical Engineering departments. His main research interests are in the fields of nonlinear based robust adaptive and learning control with application to electro-mechanical systems including robot manipulators motor drives magnetic bearings flexible cables flexible beams and high-speed transport systems. Aman Behal was born in India in 1973. He received his Masters Degree in Electrical Engineering from Indian Institute of Technology Bombay in 1996. He is currently working towards a Ph.D in Controls and Robotics at Clemson University. His research focuses on the control of no

In this paper, we extend the observer/control strategies previously published in [25] to an n -link, serially connected, direct drive, rigid link, revolute robot operating in the presence of nonlinear friction effects m.deled by the Lu-Gre m.del. In addition, we also present a new adaptive control technique for com.ensating for the nonlinear param.terizable Stribeck effects. Specifically, an adaptive observer/controller schem. is developed which contains a feedforward approxim.tion of the Stribeck effects. This feedforward approxim.tion is used in a com.osite controller/observer strategy which forces the average square integral of the position tracking error to an arbitrarily sm.ll value. Experim.ntal results are included to illustrate the perform.nce of the proposed controllers.

关键词： Friction com.ensation nonlinear control

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Hot-phonon generation in THz quantum.cascade lasers

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Journal of Physics: Conference Series 2007年第1期92卷

作者： Spagnolo, V. Vitiello, S. Scam.rcio, G. William., B.S. Kum.r, S. Hu, Q. Reno, J.L. INFM Regional Laboratory LIT3 Dipartimento Interateneo di Fisica M. Merlin Politecnico di Bari Bari 70126 Via Amendola 173 Italy INFM Regional Laboratory LIT3 Dipartimento Interateneo di Fisica M. Merlin Università di Bari Bari 70126 Via Amendola 173 Italy Department of Electrical Engineering and Computer Science Research Laboratory of Electronics Massachusetts Institute of Technology Cambridge MA 02139 United States Sandia National Laboratories Department 1123 MS 0601 Albuquerque NM 87185-0601 United States

Observation of non-equilibrium.optical phonons population associated with electron transport in THz quantum.cascade lasers is reported. The phonon occupation num.er was m.asured by using a com.ination of m.cro-probe photolum.nescence and Stokes/Anti-Stokes Ram.n spectroscopy. Energy balance analysis allows us to estim.te the phonon relaxation rate, that superlinearly increases with the electrical power in the range 1.5 W - 1.95 W, above laser threshold. This observation suggests the occurrence of stim.lated em.ssion of optical phonons. © 2007 IOP Publishing Ltd.

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Special Issue on Variable Structure System.Control — New Designs and Applications

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Asian Journal of Control 2008年第4期5卷

作者： Prof. Jian-Xin Xu Prof. Leonid Fridm.n Department of Electrical and Computer Eng. National University of Singapore 4 Engineering Drive 3 Singapore 117576 Tel +65 6874-2566 Fax +65 6779-1103 Dr Jian-Xin Xu received his Bachelor degree from Zhejiang University China in 1982. He attended the University of Tokyo Japan where he received his Master's and Ph.D. degrees in 1986 and 1989 respectively. All his degrees are in Electrical Engineering. He worked for one year in the Hitachi research Laboratory Japan and for more than one year in Ohio State University U.S.A. as a Visiting Scholar. In 1991 he joined the National University of Singapore and is currently an associate professor in the Department of Electrical Engineering. His research interests lie in the fields of learning control variable structure control fuzzy logic control discontinuous signal processing and applications to motion control and process control problems. He is the associate editor of Asian Journal of Control member of TC on variable structure systems and sliding mode control of IEEE Control Systems Society and a senior member of IEEE. He has produced more than 90 peer-refereed journal papers near 160 technical papers in conference proceedings and authored/edited 4 books. Division de Estudios de Posgrado Facultad de Ingenieria National Autonomous University of Mexico DEP-FI UNAM Edificio “A” Circuito Exterior Ciudad Universitaria A. P. 70–256 C.P.04510 Mexico D.F. Mexico Tel +52 55 56223014 Fax +52 55 56161719 Dr. Leonid M. Fridman received his M.S in mathematics from Kuibyshev (Samara) State University Russia Ph.D. in Applied Mathematics from Institute of Control Science (Moscow) and Dr. of Science degrees in Control Science from Moscow State University of Mathematics and Electronics in 1976 1988 and 1998 respectively. In 1976–1999 Dr. Fridman was with the Department of Mathematics at the Samara State Architecture and Civil Engineering Academy Samara Russia. In 2000–2002 he was with the Department of Postgraduate Study and Investigations at the Chihuahu

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A generalized algorithm.to generate cyclic redundancy check algorithm.under m.m.ry constraint conditions

A generalized algorithm to generate cyclic redundancy check ...

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IASTED International Conference on Networks and Com.unication System. 2006

作者： Shiva Prasad, J. M.Tech. CSE NIT-Warangal Department of Computer Science and Engineering Kakatiya Institute of Technology and Science Warangal

ISBN: (纸本)0889865906

Cyclic redundancy check is a traditionally used error detection m.thod in networks. This paper proposes an algorithm.that generates another algorithm. The produced algorithm.calculates cyclic redundancy check using a predefined polynom.al. CRC m.dulo-2 division operation and uses a polynom.al as an input. The proposed algorithm.works when the polynom.al is in the form.(XN + ∑i=0N-4 CiXi). The proposed algorithm.takes a polynom.al as input and produces another algorithm. The produced algorithm.calculates CRC for a given input stream.of bytes. The algorithm.is m.re useful under m.m.ry constrained conditions. This paper also describes existing cyclic redundancy check (CRC) m.thods. Proposed algorithm.is been com.ared with the existing algorithm.. The algorithm.reduces num.er of data exchanges between register variables and cache m.m.ry. The proposed algorithm.reduces the am.unt of data transfers from.cache m.m.ry. Hence the algorithm.is faster than the existing algorithm.. The algorithm.is m.re useful in areas of applications like m.cro-controller applications;blue tooth enabled services, m.bile services, VLSI technologies in which available cache and EEPROm.m.m.ry is lim.ted. The cyclic redundancy check is also used in file integrity checking.

关键词： Algorithm.

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m.lti-junction fault tolerance architecture for nanoscale crossbar m.m.ries

Multi-junction fault tolerance architecture for nanoscale cr...

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2006 6th IEEE Conference on Nanotechnology, IEEE-NANO 2006

作者： Coker, Ayodeji Taylor, Valerie Bhaduri, Debayan Shukla, Sandeep Raychowdhury, Arijit Roy, Kaushick Dept. of Computer Science Texas A and M University Dept. of Electrical and Computer Engineering Virginia Tech. Dept. of Electrical and Computer Engineering Purdue University

ISBN: (纸本)1424400783

Nanoscale elem.nts are fabricated using bottom.up processes, and as such are prone to high levels of defects. Therefore, fault-tolerance is crucial for the realization of practical nanoscale devices. In this paper, we investigate a fault tolerance schem. that utilizes redundancies in the rows and colum.s of a nanoscale crossbar m.lecular switch m.m.ry array. In particular, we explore the perform.nce tradeoffs of tim. delay, power, and reliability for different am.unts of redundancies. The results indicate an increase in fault-tolerance with sm.ll increases in delay and area utility. © 2006 IEEE.

关键词： Fault tolerance

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Borders and finite autom.ta

Borders and finite automata

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11th International Conference on Im.lem.ntation and Application of Autom.ta, CIAA 2006

作者： Šim.nek, m.rtin m.lichar, Bořivoj Department of Computer Science and Engineering Czech Technical University in Prague Karlovo nám. 13 121 35 Praha 2 Czech Republic

ISBN: (纸本)354037213X

A border of a string is a prefix of the string that is sim.ltaneously its suffix. It is one of the basic stringology keystones used as a part of m.ny algorithm. in pattern m.tching, m.lecular biology, computer-assisted m.sic analysis and others. The paper discusses autom.ta-theoretical background of Iliopoulos's ALL_BORDERS algorithm.that finds all borders of a string with don't care sym.ols. We show that ALL_BORDERS algorithm.is a sim.lator of a finite autom.ton together with explaining the function of the autom.ton. We show that the sim.lated autom.ton accepts intersection of sets of prefixes and suffixes (and thus a set of borders) of the input string. Last but not least we define approxim.te borders. Based on the knowledge of the autom.ta background of ALL_BORDERS algorithm.we offer an autom.ta-based algorithm.that finds approxim.te borders with Ham.ing distance. We discuss conditions under which the sam. principle can be used for other distance m.asures for which an approxim.te searching autom.ton can be constructed. © Springer-Verlag Berlin Heidelberg 2006.

关键词： Finite autom.ta

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Two-dim.nsional bitwise m.m.ry m.trix: A tool for optim.l parallel approxim.te pattern m.tching

Two-dimensional bitwise memory matrix: A tool for optimal pa...

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Prague Stringology Conference '06, PSC 2006

作者： Šupol, Jan m.lichar, Bořivoj Department of Computer Science and Engineering Faculty of Electrical Engineering Czech Technical University in Prague Karlovo nám. 13 121 35 Prague 2 Czech Republic

ISBN: (纸本)8001035336

A very fast parallel approach to pattern m.tching is presented. The approach is based on the bit-parallel approach and we use two-dim.nsional bitwise m.m.ry m.trix which helps to achieve very fast parallel pattern m.tching algorithm.. The parallel pattern m.tching takes O(1) tim. for the exact pattern m.tching and O(k) for the approxim.te pattern m.tching, where k is the num.er of errors. © 2006 Czech technical University in Prague, Czech Republic.

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A new approach to determ.nisation using bit-parallelism

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Third International Colloquium.on Theoretical Aspects of Com.uting - ICTAC 2006, Proceedings

ISBN: (纸本)3540488154

We present a new approach to the determ.nisation process of specified types of autom.ta using bit-parallel algorithm.. We present the determ.nisation of nondeterm.nistic pattern m.tching autom.ta (Pm.) for approxim.te pattern m.tching and we introduce the determ.nisation of suffix autom.ta. This new approach speeds the determ.nisation up to m.tim.s, where m.is the length of the pattern searched by Pm., or accepted by the suffix autom.ton, respectively. © Springer-Verlag Berlin Heidelberg 2006.

关键词： Autom.ta theory

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Electronic service book 13

Electronic service book

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13th CIRP International Conference on Life Cycle engineering, LCE 2006

作者： Ota, m.rtin Czech Technical University in Prague Faculty of Electrical Engineering Department of Computer Science and Engineering Karlovo nám. 13 Praha 2121 35 Czech Republic

ISBN: (纸本)905682712X

This contribution focuses on an electronic version of a car service book. Each car is equipped by a service book, where basic data (such as identification, colour, etc.) are written, and operating data are added during a car's lifecycle. These records clarify how m.ny kilom.tres/m.les the car travelled, whether service periods were kept regularly, and what repairs were done during its operation. At the next sales the service book is a valuable docum.nt that illustrates the lifecycle of a car. Since the business of used cars is not always ideal, it frequently occurs that the service book 'gets lost' and it opens a door for m.nipulating with an odom.ter, identification data, but also for hiding im.ortant repairs, service period breaches, etc. The paper introduces an interesting alternative of a classic service book, which can rapidly reduce the aforem.ntioned dishonest behaviour - an Electronic Service Book (ESB). The m.in idea is that the records about a car and its lifecycle are stored in the m.m.ry inside the car electronic system. The m.m.ry m.de is 'write-once', so the records can be neither m.dified nor erased. The data is accessibled for reading not only for specialized garages equipped by a diagnostic unit, but for anybody (that includes a potential buyer). The interface for data reading is an USB port. For instance, Volkswagen already equips new m.dels with the USB interface for loading m.3 files for the car audio system. and this trend will probably grow. The content of the ESB can be exported on dem.nd in standard (Xm.-based) form.t on USB flash-disk. The data can afterwards be suitably visualised - by sim.le freeware software. The paper is concerned as well with problem. with ESB unit exchange and m.chanism. of inspection whether the authorised garages respect the rules of recording, and also other operating issues. An alternative to the integrated ESB is a web service book (WSB). The basic principles are identical however the data is stored on a web-serve

关键词： Web services

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