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Band selection in hyperspectral images based on the fisher linear discriminant classifier

Band selection in hyperspectral images based on the fisher l...

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2010 IEEE 26th Convention of electrical and Electronics Engineers in Israel, IEEEI 2010

作者： Harari, Y. Bar-Yehuda, Z. Rotman, S.R. Dept. of Electrical and Computer Engineering Ben-Gurion University of the Negev Israel Imaging Sciences Center Rochester Institute of Technology United States

ISBN: (纸本)9781424486809

Hyperspectral data consists of three dimensional images;the third dimension is the spectral signature of each pixel. The question always arises: which bands should be used and how should they be weighted. In this paper, a band selection algorithm based on the Fisher's Linear Discriminant classifier (FLD) is implemented. An initial segmentation of the image into two different classes (gas and background) is used as an input for the FLD. The combination of bands to be used is selected based on the FLD results. ©2010 IEEE.

关键词： Spectroscopy

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Thermal aware test scheduling for stacked multi-chip-modules

Thermal aware test scheduling for stacked multi-chip-modules

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East-West Design and Test Symposium

作者： Vinay, N.S. Rawaty, Indira Larssonz, Erik Gaurx, M.S. Singh, Virendra Cisco Systems Bangalore India Electrical Enggineering Dept. Engineering College Ajmer India Dept. of Computer Science Linkoping University Linkoping Sweden Computer Engineering Dept. Malaviya National Institute of Technology Jaipur India Computer Design and Test Lab. Indian Institute of Science Bangalore India

ISBN: (纸本)9781424495566

In an attempt to increase the area utilization of multi-chip packages, manufacturers have started looking at 3D packaging. The 3D structures have either dies or chips stacked one above the other. These 3D structures have low thermal capabilities, and hence the thermal issues get aggravated during testing. In this paper, thermal aware test scheduling techniques for stacked structures is proposed. Care is taken to schedule the stacked partitions appropriately to prevent local heating and achieve uniform vertical temperature spread. Concurrent testing of dies is considered for reduced test time and existing test architecture is employed. The widely used global peak power model gives a pessimistic estimate of the power profile. A new partition scheme is proposed for the power profile based on power variations and true power. This scheme of power profile partitioning which is a trade-off between a cycle accurate model and global peak model offers both flexibility during scheduling and also reduces total false power. The power profile partitions are scheduled through algorithms based on heuristics. System model of the 3D stack is obtained from the linear RC-models after considering the various factors that affect the heat flow and die temperatures. Simulation results show that the proposed technique achieves uniform temperature spread across the 3D structure. © 2010 IEEE.

关键词： Economic and social effects

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Improvement the Q-factor of multi-band inductor with 90μm silicon substrate on plastic

Improvement the Q-factor of multi-band inductor with 90μm s...

引用

2010 International Symposium on Signals, systems and Electronics, ISSSE2010

作者： Chang, H.M. Kao, H.L. Shih, S.P. Lee, Y.C. Ke, C.Y. Chang, L.C. Wu, C.H. Fu, Jeffrey S. Karmakar, Nemai C. Department of MicroElectronics Engineering Chung Hua University Hsinchu Taiwan Dept. of Electronic Engineering Chang Gung Univ. Tao-Yuan Taiwan Dept. of Materials Engineering Mingchi University of Technology Taipei Taiwan Dept. of Electrical and Computer Systems Engineering Monash University Australia

ISBN: (纸本)9781424463558

This paper presents the multi-band inductor with 0.18 μm CMOS technology on plastic achieves high Q-factor and small size for multiband applications. The multi-band inductor on VLSI-standard Si Substrate is operated at ultra-wide band range. The operation frequencies are near 3 GHz, 4 GHz, 7.5 GHz and 9 GHz of the Q-factor are 6.5, 6.7, 8 and 11.5 with the inductance 2.1, 1.6, 1.1, 0.6 nH, respectively. After thinning-down the Si substrate to 90 μm and mounting on plastic, the Q-factor can improve 25∼31% without changing the inductance due to reducing the parasitic effect from Si-substrate. © 2010 IEEE.

关键词： Inductance

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On-line dynamic state estimation of power systems

On-line dynamic state estimation of power systems

引用

North American Power Symposium 2010, NAPS 2010

作者： Gao, Wenzhong Wang, Shaobu Dept. of Electrical and Computer Engineering University of Denver Denver CO United States Center for Energy Systems Research Tennessee Technological University Cookeville TN United States

ISBN: (纸本)9781424480463

Traditional state estimators based on steady state system model cannot capture the dynamics of power system very well because of the slow updating rate of SCADA systems (several seconds). The emergence of wide-area measurement systems offers new opportunity for developing more effective methods to monitor power system dynamics online. But due to the nonlinearity of state transition and observation equation, linearization and Jacobian Matrix calculation are indispensible in the existing methods of power system state estimation. This makes WAMS' high performance compromised by burdensome calculation and inaccuracy of the state estimation. In order to overcome the drawbacks, this study tries to develop an effective state estimation method without the linearization and Jacobian Matrix calculation. Firstly, unscented transformation is introduced as an effective method to calculate the means and covariances of a random vector undergoing a nonlinear transformation. Secondly, by embedding the unscented transformation in the Kalman Filter process, a new method is developed for power system dynamic state estimation. Finally, some simulation results are presented showing accuracy and easier implementation of the proposed method.

关键词： Linearization

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Impact of voltage sags on three-phase power transformers

Impact of voltage sags on three-phase power transformers

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作者： Masoum, Ali S. Moses, Paul S. Abu-Siada, Ahmed Curtin University of Technology Department of Electrical and Computer Engineering Perth Australia Defence Science and Technology Organisation Propulsion and Energy Systems Group Dept. of Defence Australia

ISBN: (纸本)9780473182366

This paper studies the behavior of three-phase power transformers under various voltage sag conditions. A nonlinear model of a three-phase three-leg transformer based on electric and magnetic circuit topologies is implemented and solved in time-domain using iterative numerical techniques. The corresponding transformer waveforms are computed and analyzed in both the time and frequency domains. Simulations are performed for different voltage sag magnitudes, starting and termination (recovery instant waveform) angles. It is shown that there can be significant distortions in transformer flux and magnetizing current, as well as three-phase output voltages and currents. Furthermore, high levels of voltage sag can severely deteriorate the power quality of input and output current and voltage waveforms.

关键词： Power quality

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Analysis of integrity vulnerabilities and a non-repudiation protocol for cloud data storage platforms

Analysis of integrity vulnerabilities and a non-repudiation ...

引用

International Workshop on Scheduling and Resource Management for Parallel and Distributed systems

作者： Feng, Jun Chen, Yu Ku, Wei-Shinn Liu, Pu Dept. of Electrical and Computer Engineering SUNY - Binghamton Binghamton NY 13902 United States Dept. of Computer Science and Software Engineering Auburn University Auburn AL 36849 United States Systems and Technology Group IBM Endicott Endicott NY 13760 United States

ISBN: (纸本)9780769541570

Data storage technologies have been recognized as one of the major dimensions of information management along with the network infrastructure and applications. The prosperity of cloud computing requires the migration from server-attached storage to network-based distributed storage. Along with variant advantages, distributed storage also poses new challenges in creating a secure and reliable data storage and access facility. The data security in cloud is one of the challenges to be addressed before the novel pay-as-you-go business model can be accepted and applied widely. Concerns are raised from both insecure/unreliable service providers and potential malicious users. In this article, we analyze the integrity vulnerability existing in the current cloud storage platforms and show the problem of repudiation. A novel non-repudiation (NR) protocol specifically designed in the context of cloud computing environment is proposed. We have also discussed the robustness of the NR protocol against typical attacks in the network environments. © 2010 IEEE.

关键词： Cloud storage

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Adaptive background modeling for effective ghost removal and robust left object detection

Adaptive background modeling for effective ghost removal and...

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International Conference on Information technology Convergence and Services

作者： Yang, Hwiseok Nam, Yunyoung Cho, We-Duke Choi, Yoo-Joo Dept. of Electrical and Computer Engineering Ajou University Korea Republic of Center of excellence for Ubiquitous System Ajou University Korea Republic of Dept. of Newmedia Korean German Institute of Technology Korea Republic of

ISBN: (纸本)9781424475858

A background model using image subtraction in an intelligent video surveillance system could make severe errors in detection and tracking of objects due to changes of natural phenomena such as shadows and wind. Adaptive background models have been proposed in order to solve these problems, but most previous methods can make a ghost and sometimes miss the left objects which have stopped moving for a while. In this paper, we propose an adaptive background method to robustly track left objects and to effectively remove ghosts. The proposed method is based on background subtraction using adaptive median filtering and background update using motion information. In this method, the background is firstly updated based on the motion information in a pixel unit and secondly updated again based on the contour of the objects in a non-motion region unit. The method prevents the left objects from absorbing into the background and removes the ghosts quickly. In the experiments, we prove an effectiveness of our method through the comparison with the previous adaptive median filtering background subtraction. © 2010 IEEE.

关键词： Object detection

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Inter-ONU scheduling scheme for QoS guarantee in 10G EPON

Inter-ONU scheduling scheme for QoS guarantee in 10G EPON

引用

International Conference on Broadband, Wireless Computing, Communication and Applications

作者： Jun, Jae-Hyun Yu, Zhibin Jung, Min-Suk Kim, Sung-Ho Electrical Engineering and Computer Science Kyungpook National University Daegu Korea Republic of Dept. of Software Development Center for Embedded Software Technology Daegu Korea Republic of

ISBN: (纸本)9780769542362

Recently, more and more services need high quality bandwidth. In order to satisfy those services, high-speed networks are needed. The Task Force team of IEEE 802.3ah set a standard as Ethernet Passive Optical Network (EPON) that is a next generation subscriber access network. IEEE 802.3av developed 10G EPON which has 10 times more capacity than EPON to solve the high quality problem. Research on 10G EPON has been conducted by Kramer, but still there were limitations in providing Quality of Service (QoS). Therefore, this paper suggests a Time synchronization method, resource reservation method, and bandwidth allocation method in 10G EPON. The OPNET simulation results show that our proposed ideas can provide enough services in 10G EPON. © 2010 IEEE.

关键词： Quality of service

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Combining standard feedback controllers with feedforward blade pitch control for load mitigation in wind turbines

Combining standard feedback controllers with feedforward bla...

引用

作者： Dunne, Fiona Pao, Lucy Y. Wright, Alan D. Jonkman, Bonnie Kelley, Neil Dept. of Electrical Computer and Energy Engineering University of Colorado Boulder CO United States National Wind Technology Center NREL Golden CO United States

ISBN: (纸本)9781600867392

Combined feedback/feedforward blade pitch control is compared to industry standard feedback control when simulated in realistic turbulent winds. The feedforward controllers are designed to reduce fatigue loads, increasing turbine lifetime and therefore reducing the cost of energy. Various collective pitch and individual pitch versions of two feedforward designs are studied: Gain-Scheduled Model-Inverse and Gain-Scheduled Shaped Compensator. The input to the feedforward controller is a measurement of incoming wind speed, which could potentially be provided by LIDAR. Three of the designs reduce structural loading compared to standard feedback control, without reducing power production. © 2010 by the American Institute of Aeronautics and Astronautics, Inc.

关键词： Feedback control

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Parallel-channel flow instabilities and active control schemes in two-phase microchannel heat exchanger systems

Parallel-channel flow instabilities and active control schem...

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作者： Zhang, Tie Jun Wen, John T. Julius, Agung Bai, He Peles, Yoav Jensen, Michael K. Rensselaer Polytechnic Institute Troy NY 12180 United States Center for Automation Technologies and Systems United States Electrical Computer and Systems Engineering Dept. United States Mechanical Aerospace and Nuclear Engineering Dept. United States Mechanical Engineering Dept. Northwestern University United States

ISBN: (纸本)9781424474264

Parallel-channel flow mal-distribution and pressure-drop flow oscillations are two of the most severe dynamic instabilities for boiling flow especially in microchannel systems. This paper presents a framework for the transient analysis and active control of microchannel flow instabilities at a system-level view. A lumped two-phase flow system model is derived from the momentum balance equation to capture the characteristics of the microchannel heat exchangers. Bifurcations of flow distribution and inlet pressure can arise in parallel-channel two-phase flow systems. This paper investigates the control-theoretic properties with different control devices, including inlet valves and supply pump. Individual control valves at the inlet of each channel can be used to suppress both flow mal-distribution and flow oscillations effectively, although this scheme is subject to higher pressure loss and potential higher supply pumping power. Using the pump alone can only suppress pressure-drop flow oscillations, but not for flow mal-distribution in two identical parallel channels. However, we make an interesting observation that with different channel properties, we regain controllability from the pump and observability from a single channel flow rate measurement. © 2010 AACC.

关键词： Channel flow

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