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Design and implementation of algorithm with multichannel load balancing and failover for generic storage area networks

Design and implementation of algorithm with multichannel loa...

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International Conference on Communication Systems

作者： K. Ng W.Y.H. Wang Department of Electrical & Computer Engineering National University of Singapore Singapore Agency for Science Technology and Research Data Storage Institute Singapore

This paper presents the design of an algorithm to provide end-to-end multichannel load balancing and failover for generic SANs. A virtual channel is formed by the aggregation of multiple subchannels. This provides scalability as sub-channels can be added or removed when required. Multiple sub-channels also improve the reliability of-storage network. By exchanging information between 2 hosts, the algorithm is also able to balance both the transmission and reception load. Additional information can be added to transmitted packets by lowering the MTU value of a virtual network interface. This additional information can be used to identify the network storage protocol used so as to provide end-to-end multichannel functionality independent of the network storage protocol used. Results have shown that the implementation is able to provide higher throughput with the added benefits of end-to-end load balancing and failover to both hyperSCSI and iSCSI

关键词： Algorithm design and analysis Load management Storage area networks Protocols Local area networks Sections computer networks Memory Scalability Throughput

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Silicon-germanium saturable absorber mirrors

Silicon-germanium saturable absorber mirrors

引用

IEEE Photonics Conference (IPC)

作者： F.J. Grawert S. Akiyama J.T. Gopinath F.O. Ilday J. Liu H. Shen K. Wada L.C. Kimerling E.P. Ippen F.X. Kaertner Department of Electrical Engineering and Computer Science and Research Laboratory of Electronics Massachusetts Institute of Technology Cambridge MA USA Department of Materials Science and Engineering and Material Processing Center Massachusetts Institute of Technology Cambridge MA USA

A silicon-germanium ultra-broadband saturable Bragg reflector with sub-picosecond recovery time is fabricated. Its performance is demonstrated by mode-locking an Er-Yb glass laser generating 220 fs pulses spanning the... 详细信息

关键词： Germanium silicon alloys Silicon germanium Mirrors Optical pulse generation Absorption Laser mode locking Ultrafast optics Optical scattering Pulse measurements Laser feedback

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A self-sensing thermal actuator incorporating micromirror for tracking mechanism of optical drive

A self-sensing thermal actuator incorporating micromirror fo...

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IEEE SENSORS

作者： J.P. Yang X.C. Deng T.C. Chong Data Storage Institute Agency for Science Technology and Research Singapore Singapore Electrical and Computer Engineering Department National University of Singapore Singapore Singapore

A novel self-sensing thermal actuator incorporating a micromirror is proposed as a fine positioning actuator for the precise-tracking mechanism of a high-density optical drive. Due to the bimorph effect, a bilayer cantilever, consisting of two materials with different thermal expansion, can provide force or displacement with change in temperature. In the proposed thermal actuator, an integrated micromirror suspended by four identical thermal bilayer cantilevers is vertically driven to move upwards by a driving voltage. Meanwhile, the mirror position can be detected by an embedded high-sensitivity piezoresistive sensor. The process flow of the self-sensing actuator is presented with the prototypes. The experimental results show that the micromirror can be driven up to an equivalent 1.4 /spl mu/m displacement in the tracking direction by the driving voltage of 3 V. The device also has a measured resonant frequency of 7 kHz and displacement sensitivity of 0.04 ppm//spl Aring/ to support high bandwidth servo feedback control in an optical drive.

关键词： Actuators Micromirrors Optical feedback Optical sensors Thermal force Optical materials Thermal expansion Force sensors Temperature sensors Voltage

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Resonant excitation of plasma oscillations in a two-dimensional electron layer via diffraction of the electromagnetic wave on a perfectly conductive gate electrode

Resonant excitation of plasma oscillations in a two-dimensio...

引用

International Conference on Mathematical Methods in Electromagnetic Theory (MMET)

作者： V.V. Popov O.V. Polischuk M.S. Shur Institute of Radio Engineering and Electronics Saratov Division Russian Academy of Science Saratov Russia Department of Electrical Computer and System Engineering and RPUIBM Broadband Data Transfer Rensselaer Polytechnic Institute Troy NY USA

In this paper, we solve the problem of excitation of plasma oscillations in 2D electron layer selfconsistently using the full system of the Maxwell equations. We formulate this problem as the problem of diffraction of... 详细信息

关键词： Resonance Plasma waves Electrons Electromagnetic diffraction Electromagnetic scattering Electrodes Fourier transforms Slabs Maxwell equations Radiation detectors

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A new fuzzy-competitive algorithm for removing impulsive noises in digital images

A new fuzzy-competitive algorithm for removing impulsive noi...

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IEEE Conference on Cybernetics and Intelligent Systems

作者： M.T. Harandi C. Lucas School of Cognitive Science (SCS) Institute of Studies in Theoretical Physics and Mathematics Tehran Iran Control and Intelligent Processing Center of Excellence Department of Electrical and Computer Engineering University of Tehran Tehran Iran

Images are often contaminated by impulse noise. The major drawback of median filtering and its variants - that are widely used for removing impulsive noise - is the blurring effect for large window sizes and low noise suppression for small window sizes. In this paper, a fuzzy-competitive algorithm for removing impulse noise in images is proposed. The proposed algorithm utilized fuzzy inference systems for impulse detection. The detected impulses are then removed using long-range correlation information in a competitive scheme. The experimental results show that the performance of our method in removing impulsive noises is better than that of most other state-of-the-art methods

关键词： Digital images Filtering Detectors Hybrid intelligent systems Inference algorithms Fuzzy systems Digital filters Nonlinear filters Decision making Iterative algorithms

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Face recognition using reinforcement learning

Face recognition using reinforcement learning

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IEEE International Conference on Image processing

作者： M.T. Harandi M.N. Ahmadabadi B.N. Araabi School of Cognitive science (SCS) Institute of Studies in Theoretical Physics and Mathematics Tehran Iran Control and Intelligent Processing Center of Excellence Department of Electrical and Computer Engineering University of Tehran Tehran Iran

Neuroscientists believe that human beings recognize faces not only by utilizing some holistic search among all learned faces, but also through a feature analysis that aimed to specify more important features of each specific face. In this paper, we propose a hierarchical classifier that uses both holistic search and per face dominant feature analysis to recognize faces. Reinforcement learning is used to find a set of dominant features for each image in a training dataset. Wavelet transform is employed as a preprocessing tool, which results in higher discrimination among classes. Simulation studies justify the better performance of the proposed method as compared to that of eigenface method.

关键词： Face recognition Learning Principal component analysis Humans Karhunen-Loeve transforms Training data Wavelet transforms Interpolation Process control Intelligent control

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A SVM-based method for face recognition using a wavelet PCA representation of faces

A SVM-based method for face recognition using a wavelet PCA ...

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IEEE International Conference on Image processing

作者： M. Safari M.T. Harandi B.N. Araabi School of Cognitive Science SCS Institute of Studies in Theoretical Physics and Mathematics Tehran Iran Control and Intelligent Processing Center of Excellence Department of Electrical and Computer Engineering University of Tehran Tehran Iran

This paper proposes a new method of face representation which is used for face recognition by SVM. For face representation we have used a two-step method, first two-dimensional discrete wavelet transform (DWT) is used to transform the faces to a more discriminated space and then principal component analysis (PCA) is applied. The proposed method produced a significant improvement which includes a substantial reduction in error rate and in time of processing during the obtaining PCA orthonormal basis.

关键词： Face recognition Principal component analysis Support vector machines Image recognition Feature extraction Support vector machine classification Humans Authentication Linear discriminant analysis Independent component analysis

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Noise characteristics of 340 nm and 280 nm GaN-based light emitting diodes

Noise characteristics of 340 nm and 280 nm GaN-based light e...

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作者： Sawyer, Shayla Rumyantsev, Sergey L. Pala, Nezih Shur, Michael S. Bilenko, Yuriy Gaska, Remis Kosterin, Pavel V. Salzberg, Brian M. Department of Electrical Computer and Systems Engineering Center for Broadband Data Transport Science and Technology CII 9017 Rensselaer Polytechnic Institute Troy NY 12180-3590 United States Sensor Electronic Technology Inc. 1195 Atlas Road Columbia SC 29209 United States Departments of Neuroscience and Physiology University of Pennsylvania School of Medicine Philadelphia PA 19104 United States

Low frequency fluctuations in light intensity of 340 nm and 280 nm GaN-based light emitting diodes (LEDs) are compared with noise properties of other commercially available UV and visible wavelength LEDs and halogen lamps. At low frequencies, LEDs can exhibit lower levels of noise than halogen lamps. An LED noise quality factor β is estimated for the UV LEDs. © World Scientific Publishing Company.

关键词： Light emitting diodes

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Electrodynamics of plasma oscillations in semiconductor microdevices with two-dimensional electron channels

Electrodynamics of plasma oscillations in semiconductor micr...

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International Conference on Mathematical Methods in Electromagnetic Theory (MMET)

作者： V.V. Popov O.V. Polischuk G.M. Tsymbalov M.S. Shur W. Knap Institute of Radio Engineering and Electronics (Saratov Division) Russian Academy of Science Saratov Russia Institute of Radio Engineering and Electronics (Saratov Division) Russian Academy of Sciences Zelyonaya 38410019 Saratov Russia Department of Electrical Computer and System Engineering and RPI/IBM Broadband Data Transfer Rensselaer Polytechnic Institute Troy NY USA GES CNRS University of Montpellier 2 Montpellier France

Electromagnetic theory of plasma oscillations in field-effect transistor with two-dimensional electron channel is presented. Two different key electromagnetic problems are considered. They are the problems of diffraction of the plane electromagnetic wave (i) on the slot in infinite perfectly conductive plane, which is bridged by 2D electron channel and (ii) on the perfectly conductive strip, which screens partially an infinite 2D electron sheet located at a given distance from the strip. New physics inherent in these problems is revealed.

关键词： Electrodynamics Electrons Plasma waves Plasma devices Frequency FETs Electromagnetic scattering Plasma properties Electrostatics Impedance

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Plasmon terahertz response of a slot diode with a two-dimensional electron channel

Plasmon terahertz response of a slot diode with a two-dimens...

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International Kharkov Symposium on Physics and engineering of Microwaves, Millimeter, and Submillimeter Waves

作者： V.V. Popov G.M. Tsymbalov M.S. Shur W. Knap Institute of Radio Engineering and Electronics (Saratov Division) Russian Academy of Science Saratov Russia Department of Electrical Computer and System Engineering and RPI/IBM Center for Broadband Data Transfer CII90 15 Rensselaer Polytechnic Institute Troy NY USA UMR 5650 GFS CNRS Universite Montpellier2 Montpellier France

High-frequency response of field-effect transistors and diodes with two-dimensional electron channels is strongly affected by plasma oscillations in the channel. This phenomenon in its various manifestations can be used for the detection, frequency multiplication and generation of terahertz radiation. One of the main parameters of a device, which determines its high-frequency properties, is the device impedance. We calculate here the impedance of a slot diode with conductively contacted two-dimensional electron channel using the full system of the Maxwell equations. In this way, we account for the radiation resistance and inter-contact capacitance from first principles.

关键词： Plasmons Diodes Electrons Impedance FETs Plasma properties Plasma devices Radiation detectors Frequency conversion Maxwell equations

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