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Signal processing for neural spike trains

Computational intelligence and neuroscience 2010年第1期2010卷 698751页

作者： Theodore W Berger Zhe Sage Chen Andrzej Cichocki Karim G Oweiss Rodrigo Quian Quiroga Nitish V Thakor Department of Biomedical Engineering Viterbi School of Engineering University of Southern California Los Angeles CA 90089 USA Neuroscience Statistics Research Laboratory Massachusetts Institute of Technology Cambridge MA 02139 USA Laboratory for Advanced Brain Signal Processing RIKEN Brain Science Institute Wako-shi Saitama 351-0198 Japan Department of Electrical and Computer Engineering Michigan State University MI 48824 USA Department of Engineering University of Leicester Leicester LE1 7RH UK School of Medicine Johns Hopkins University Baltimore MD 21205 USA

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Neuro-fuzzy based fault diagnosis of a Steam Generator

Neuro-fuzzy based fault diagnosis of a Steam Generator

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7th IFAC International Symposium on Fault Detection, Supervision and Safety of Technical Systems, SAFEPROCESS'09

作者： Razavi-Far, Roozbeh Davilu, Hadi Palade, Vasile Lucas, Caro Department of Nuclear Engineering Amirkabir University of Technology P.O. Box 15875 4413 Tehran Iran Computing Laboratory Oxford University Wolfson Building Parks Road Oxford OX1 3QD United Kingdom Center of Excellence on Control and Intelligent Processing Department of Electrical and Computer Engineering University of Tehran P.O. Box 14395 1515 Tehran Iran

ISBN: (纸本)9783902661463

This paper focuses on the development and application of a Neuro-Fuzzy (NF) networks-based scheme for Fault Detection and Isolation (FDI) in a U-tube Steam Generator (UTSG). First, a NF network is trained with data collected from a full scale UTSG simulator, and residuals are generated for fault detection. To identify the UTSG, a Locally Linear Neuro-Fuzzy (LLNF) model is used. This model is trained using the Locally Linear Model Tree (LOLIMOT) algorithm which is an incremental tree structure algorithm. Then, an evolutionary algorithm is used to train a Mamdani type NF network to classify the residuals. The residuals are analyzed by using this NF classifier for fault isolation purposes. © 2009 IFAC.

关键词： Fault detection

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Magnetization relaxation in YBCO films with improved supercurrent transport properties

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Journal of Physics: Conference Series 2010年第1期234卷

作者： L Miu I Ivan P Badica G Jakob D Miu P Mele K Matsumoto M Mukaida Y Yoshida T Horide A Ichinose S Horii National Institute of Materials Physics 77125 Bucharest-Magurele Romania Institute of Physics University of Mainz 55128 Mainz Germany National Institute of Laser Plasma and Radiation Physics 77125 Bucharest-Magurele Romania Department of Materials Science and Engineering Kyushu Institute of Technology 1-1 Sensui-cho Tobata-ku Kitakyushu 804-8550 Japan Department of Materials Science and Engineering Kyushu University 744 Motooka Nishi-ku Fukuoka 819-0395 Japan Department of Electrical Engineering and Computer Science Nagoya University Furo-cho Chikikusa-ku Nagoya 464-8603 Japan Department of Materials Science and Engineering Kyoto University Yoshida-honmachi Sakyo-ku Kyoto 606-8501 Japan Electric Power Engineering Research Laboratory Central Research Institute of Electric Power Industry 2-6-1 Nagasaka Yokosuda Kanazawa 240-0196 Japan Department of Environmental Systems Engineering Kochi University of Technology Kami-shi Kochi 782-8502 Japan

The relaxation of the irreversible magnetization in optimally doped YBCO films with natural and artificial pinning centres was measured in zero-field cooling conditions using SQUID magnetometry. The external magnetic field H was oriented along the c axis. An appropriate method for the determination of the characteristic vortex pinning energy from the normalized vortex-creep activation energy is discussed. This is based on the existence of a crossover elastic (collective) vortex creep at low temperatures T – plastic vortex creep at high T, caused by the T dependent macroscopic currents induced in the sample during magnetization measurements.

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NEURO-FUZZY BASED FAULT DIAGNOSIS OF A STEAM GENERATOR

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IFAC Proceedings Volumes 2009年第8期42卷 1180-1185页

作者： Roozbeh Razavi-Far Hadi Davilu Vasile Palade Caro Lucas Department of Nuclear Engineering Amirkabir University of Technology P.O. Box 15875-4413 Tehran Iran (Tel:+98-***) Computing Laboratory Oxford University Wolfson Building Parks Road Oxford OX1 3QD UK Center of Excellence on Control and Intelligent Processing Department of Electrical and Computer Engineering University of Tehran P.O. Box 14395-1515 Tehran Iran

关键词： Fault Diagnosis Neuro-Fuzzy Networks Locally Linear Neuro Fuzzy Model Locally Linear Model Tree Steam Generator

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plasma-treated surfaces to direct embryonic stem-cell differentiation

Plasma-treated surfaces to direct embryonic stem-cell differ...

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8th World Biomaterials Congress 2008, WBC 2008

作者： Hanley, E. Lauer, J.L. Shohet, J.L. Lyons, G.E. Plasma Processing and Technology Laboratory Department of Electrical and Computer Engineering University of Wisconsin Madison WI 53706 United States Department of Anatomy University of Wisconsin-Madison Madison WI 53706 United States

The positive results seen by ES cells precociously expressing the vWF and PECAM genetic markers on the tetraglyme surfaces suggest a directed differentiation of ES cells into endothelial cells. Surfaces with more cros... 详细信息

ISBN: (纸本)9781615670802

关键词： Endothelial cells

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Novel Applications of Noise in Sensing and Communications

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AIP Conference Proceedings 2007年第1期922卷 405-410页

作者： Laszlo B. Kish Robert Mingesz Zoltan Gingl Gabor Schmera Janusz Smulko Chiman Kwan Peter Heszler Claes‐Goran Granqvist 1Texas A&M University Department of Electrical and Computer Engineering College Station TX 77843‐3128 2University of Szeged Department of Experimental Physics Dom ter 9 Szeged H‐6720 Hungary 3Space and Naval Warfare Systems Center San Diego CA 92152‐5001 4Gdansk University of Technology WETiI ul. G. Narutowicza 11/12 80‐952 Gdansk Poland 5Signal Processing Inc. 13619 Valley Oak Circle Rockville MD 20850 6Research Group of Laser Physics of the Hungarian Academy of Sciences University of Szeged P.O. Box 406 H‐6701 Szeged Hungary 7Department of Engineering Sciences The Ångström Laboratory Uppsala University P.O. Box 534 SE‐751 21 Uppsala Sweden

Recently, it has been shown that excess noises generated or modified by chemical agents can be used to detect and identify chemicals with enhanced sensitivity and selectivity. Moreover thermal noise and its artificial versions (Johnson‐like noises) can be utilized as information carriers with peculiar properties. The first application is called Fluctuation‐Enhanced Sensing. The second class can be called Thermal Noise Informatics with relevant topics are Zero Power Classical Communication and (in the quantum limit) Zero‐Quantum Quantum Communication; Thermal Noise Driven Computing; and Totally Secure Classical Communication. In the paper version of this talk, we will briefly describe the scope of these fields and in the oral talk we also provide extended considerations and results.

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Expression compensation for face recognition using a polar geodesic representation

Expression compensation for face recognition using a polar g...

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3rd International Symposium on 3D Data processing, Visualization, and Transmission, 3DPVT 2006

作者： Mpiperis, Iordanis Malassiotis, Souris Strintzis, Michael G. Information Processing Laboratory Electrical and Computer Engineering Department Aristotle University of Thessaloniki Thessaloniki 541 24 Greece Informatics and Telematics Institute Centre for Research and Technology Hellas 1st Km Thermi-Panorama Rd Thessaloniki 57001 Greece

ISBN: (纸本)0769528252

This paper addresses the problem of face recognition in the presence of facial deformations caused by expressions. An isometric mapping between surfaces is assumed, which allows preservation of geodesic distance between facial points. Subject to this assumption, we propose a novel technique which integrates 2D and 3D information to establish a new deformation invariant representation of the face. The 3D surface is used to define a polar geodesic coordinate space which is independent of the intrinsic geometry of the face. The corresponding color image is embedded in this space and serves as the recognition data. A preceding stage of hierarchical diffeomorphic grid-based image warping before the recognition process combined with a lip segmentation technique are also employed to increase the overall performance of the algorithm. © 2006 IEEE.

关键词： Face recognition

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FPGA implementation of point multiplication on Koblitz curves using kleinian integers

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8th International Workshop on Cryptographic Hardware and Embedded Systems, CHES 2006

作者： Dimitrov, V.S. Järvinen, K.U. Jacobson Jr., M.J. Chan, W.F. Huang, Z. Department of Electrical and Computer Engineering University of Calgary 2500 University Drive NW Calgary Alta. T2N 1N4 Canada Signal Processing Laboratory Helsinki University of Technology Otakaari 5A 02150 Espoo Finland Department of Computer Science University of Calgary 2500 University Drive NW Calgary Alta. T2N 1N4 Canada

ISBN: (纸本)3540465596

We describe algorithms for point multiplication on Koblitz curves using multiple-base expansions of the form k = Σ±τa(τ - 1)b and k = Σ±τa(τ - 1) b(τ2 - τ -1)c. We prove that the number of terms in the second type is sublinear in the bit length of k, which leads to the first provably sublinear point multiplication algorithm on Koblitz curves. For the first type, we conjecture that the number of terms is sublinear and provide numerical evidence demonstrating that the number of terms is significantly less than that of τ-adic non-adjacent form expansions. We present details of an innovative FPGA implementation of our algorithm and performance data demonstrating the efficiency of our method. © International Association for Cryptologic Research 2006.

关键词： Field programmable gate arrays

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Ionospheric Modification at Twice the Electron Cyclotron Frequency

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Physical Review Letters 2005年第12期94卷 125001-125001页

作者： F. T. Djuth T. R. Pedersen E. A. Gerken P. A. Bernhardt C. A. Selcher W. A. Bristow M. J. Kosch Geospace Research Inc. El Segundo California 90245 USA Air Force Research Laboratory Hanscom Air Force Base Massachusetts 01731 USA Electrical and Computer Engineering Department Cornell University Ithaca New York 14853 USA Plasma Physics Division Naval Research Laboratory Washington D.C. 20375 USA Information Technology Division Naval Research Laboratory Washington D.C. 20375 USA Geophysical Institute UAF Fairbanks Alaska 99775 USA Communications Systems Lancaster University Lancaster LA1 4YR United Kingdom

In 2004, a new transmission band was added to the HAARP high-frequency ionospheric modification facility that encompasses the second electron cyclotron harmonic at altitudes between ∼220 and 330 km. Initial observations indicate that greatly enhanced airglow occurs whenever the transmission frequency approximately matches the second electron cyclotron harmonic at the height of the upper hybrid resonance. This is the reverse of what happens at higher electron cyclotron harmonics. The measured optical emissions confirm the presence of accelerated electrons in the plasma.

关键词： Ionosphere

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Monte-Carlo simulation of the effects of vacuum ultraviolet radiation on electronic materials

Monte-Carlo simulation of the effects of vacuum ultraviolet ...

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IEEE International Conference on Integrated Circuit Design and technology (ICICDT)

作者： G.S. Upadhyaya J.L. Shohet J.L. Lauer Plasma Processing & Technology Laboratory and Department of Electrical & Computer Engineering University of Wisconsin Madison Madison WI USA

Radiation induced damage during the plasma processing of semiconductor materials adversely affects device reliability. Our group has shown in the past that Vacuum Ultraviolet (VUV) radiation (10nm-200nm) can beneficially deplete the charge deposited on the surface of the semiconductor by temporarily increasing the conductivity of the dielectric. The increase in conductivity has mainly been attributed to the generation of photoemission current and formation of electron hole pairs in the dielectric. In this paper, we discuss the steps involved in developing a model for VUV-semiconductor dielectric interactions based on the well-known Monte Carlo method. The statistical information obtained from this simulation will be compared to the experimental values obtained by exposing silicon nitride wafers to synchrotron radiation of energy 20eV. The simulation predicts the surface potential on the wafer due to photoemission. Experimentally measured surface potentials on the dielectric are used to check the validity of the simulation. Of the different process that can occur when a photon is incident on an atom, we concentrate mainly on photoemission of an electron. Consequently, the elastic and inelastic scattering events experienced by the electron during the course of its motion inside the dielectric are also considered. A modified form of the screened Rutherford formula, which approximates the Mott cross-section, as developed by Browning et. al., has been applied in this simulation. Initial simulation results will be presented.

关键词： Photoelectricity Semiconductor materials Conductivity Electrons Conducting materials Dielectric materials plasma devices plasma materials processing plasma simulation Materials reliability

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