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International Forum on Information Technology and Applications, IFITA

作者： Jun He Ximei Li Lijuan Li Chunming Tang Computer and Information Engineering Department HuaiHua Vocational and Technical College Huaihua Hunan China School of Computer and Communication Hunan University Changsha Hunan China School of Mathematics and Information Science Guangzhou University Guangzhou Guangdong China State Key Laboratory of Information Security Institute of Software Science Chinese Academy and Sciences Beijing China

With the characteristic that the commutativity of modular exponential function makes the specific order of secret distribution process less important and on basis of the abstruseness of discrete logarithm, this paper proposed a new secret sharing scheme. In the scheme, the participants themselves select the private keys, which can avoid the distributor's fraud and reduce the distribution's burden as well as ensure the scheme's reuse. The credible participants can join in or leave the participants collection at any time without restarting the scheme procedures.

关键词： Encryption computers Performance analysis Presses Data mining

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A methodology for power quality evaluation in distribution network with distributed generation

A methodology for power quality evaluation in distribution n...

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International Conference on Critical Infrastructures, CRIS

作者： Gengyin Li Zhe Zhang Xiang Li Song Wang Ming Zhou Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control under Ministry of Education North China Electric Power University Beijing China Department of Electrical Engineering Tsinghua University Haidian Beijing China School of Electrical and Computer Engineering North China Electric Power University Beijing China

ISBN: (纸本)9781424480807

The issue of power quality in the distribution system is always in sense of the concern. With the high penetration of distributed generation (DG) currently, it tends to be more complicated. This paper presents a new approach to evaluate impacts of the DG on power quality of the distribution network. In the process an objective function will be modeled, which will be solved by the optimization toolbox, in order to calculate the result for the evaluating grade. Furthermore, the results of the overall evaluation will be given via the eigenvalue weighted method. The power quality ranking of each feeder with the distributed generators in the distribution network will be apparent with the given weight of influence caused by DGs divided in forms of energy resource.

关键词： Power quality Generators Indexes Distributed power generation Eigenvalues and eigenfunctions Optimization Voltage fluctuations

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Optimal decisions of closed-loop supply chain considering substitution in new and old product

Optimal decisions of closed-loop supply chain considering su...

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作者： Zhou, Yancong Sun, Junqing Li, Weiwei School of Information Engineering Tianjin University of Commerce Tianjin 300134 China Key Laboratory of Computer Vision and System Tianjin University of Technology Tianjin 300191 China General Courses Department Academy of Military Transportation Tianjin 300161 China

ISBN: (纸本)9787894631046

In a closed-loop supply chain system with new and old product, remanufacturing and substitution was considered in the problem. Before random demand and random return are realized, the manufacutring quantities of new and old product, and remanufacturing quantity of used product need to be decided. Firstly, the closed loop system model with substitution and random return was proposed, and the optimal decsion problem was given. Secondly, the problem was translated into other optimal problem, the existence and uniqueness of optimal solution were proved, and the optimal decision structure was given.

关键词： Supply chains

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Equality detection for linear arithmetic constraints

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Journal of Zhejiang University-Science A(Applied Physics & engineering) 2009年第12期10卷 1784-1789页

作者： Li LI Kai-duo HE Ming GU Xiao-yu SONG Department of Computer Science and Technology Tsinghua University Beijing 100084 China School of Software Tsinghua University Beijing 100084 China MOE Key Laboratory for Information System Security Beijing 100084 China Department of Electrical and Computer Engineering Portland State University Oregon 97207 USA

Satisfiability modulo theories (SMT) play a key role in verification applications. A crucial SMT problem is to combine separate theory solvers for the union of theories. In previous work, the simplex method is used to determine the solvability of constraint systems and the equalities implied by constraint systems are detected by a multitude of applications of the dual simplex method. We present an effective simplex tableau-based method to identify all implicit equalities such that the simplex method is harnessed to an irreducible minimum. Experimental results show that the method is feasible and effective.

关键词： Model checking Satisfiability modulo theories （SMT） Linear arithmetic

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GaN high electron mobility transistors with localized Mg doping and drain metal extension

GaN high electron mobility transistors with localized Mg dop...

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2010 10th IEEE International Conference on Solid-State and Integrated Circuit Technology

作者： Xie, Gang Zhang, Bo Fu, Fred Y. Ng, W.T. Edward S. Rogers Sr. Department of Electrical and Computer Engineering University of Toronto Toronto ON M5S 3G4 Canada State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China Chengdu Sichuan China Microelectronics TCAD Crosslight Software Inc. 121-3989 Henning Dr. Burnaby BC V5C 6P8 Canada

ISBN: (纸本)9781424457984

A Magnesium Doped Layer (MDL) under the 2-DEG channel and a Drain Metal Extension (DME) are proposed to provide a new degree of freedom in the optimization between breakdown voltage (BV) and specific on-resistance (R on-sp) in AlGaN/GaN HEMTs. The surface electric field of the proposed structure is distributed more evenly when compare to the MDL-only structure with the same dimensions. A breakdown voltage of 1390V with specific-on- resistance of 4mΩ·cm2 was obtained with LM = 1μm, a peak concentration of 8×1017 cm-3, L pd = 3μm and a drift region length of 10μm. Comparing with the conventional MDL-only HEMT structure, the MDL-DME is shown to deliver comparable specific-on-resistance while featuring a 54% BV improvement without any area overhead penalty. ©2010 IEEE.

关键词： High electron mobility transistors

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Relevance feedback of content-based image retrieval using support vector machine

Relevance feedback of content-based image retrieval using su...

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2009 5th IEEE GCC Conference and Exhibition, GCC 2009

作者： Selamat, Ali Lim, Pei-Geok Department of Software Engineering Faculty of Computer Science and Information System Malaysia

ISBN: (纸本)9781424438853

The rapid growth of computer technologies and the advent of the World Wide Web have increased the amount and the complexity of multimedia information. A content-based image retrieval (CBIR) system has been developed as an efficient image retrieval tool, whereby the user can provide their query to the system to allow it to retrieve the user's desired image from the image database. However, the traditional relevance feedback of CBIR has some limitations that will decrease the performance of the CBIR system, such as the imbalance of training-set problem, classification problem, limited information from user problem, and insufficient training-set problem. Therefore, in this study, we proposed an enhanced relevance-feedback method to support the user query based on the representative image selection and weight ranking of the images retrieved. The support vector machine (SVM) has been used to support the learning process to reduce the semantic gap between the user and the CBIR system. From these experiments, the proposed learning method has enabled users to improve their search results based on the performance of CBIR system. In addition, the experiments also proved that by solving the imbalance training set issue, the performance of CBIR could be improved.

关键词： Support vector machines

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Multiple-atlas-based automatic sementation of hippocampus for lateralization in temporal lobe epilepsy

Multiple-atlas-based automatic sementation of hippocampus fo...

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IEEE International Symposium on Biomedical Imaging

作者： Alireza Akhondi-Asl Kourosh Jafari-Khouzani Hamid Soltanian-Zadeh Image Analysis Laboratory Department of Diagnostic Radiology Henry Ford Health System Detroit MI USA School of Cognitive Sciences Institute of Studies in Theoretical Physics and Mathematics Tehran Iran Control and Intelligent Processing Center of Excellence School of Electrical and Computer Engineering University of Tehran Tehran Iran

ISBN: (纸本)9781424441259

We introduce a 3D segmentation framework which uses principal shapes. The probabilistic energy function of the method is defined based on intensity, tissue type, and location information of the structures using a multiple atlas method. For intensity information, nonparametric probability density function is used which considers intensity relation of different structures. To find a local minimum of the energy function, a two-step optimization strategy is used. In the first step, shape parameters are optimized based on the analytic derivatives of the energy function. In the second step, shapes of the structures are fine-tuned using a level set method. The proposed method is shown to be superior to some popular methods in the literature using a dataset of 64 patients with mesial temporal lobe epilepsy. In addition, the method can be used for lateralization with accuracy close to that of manual segmentation.

关键词： Hippocampus Temporal lobe Epilepsy Image segmentation Principal component analysis Shape control Probability density function Level set Skull Algorithm design and analysis

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Delay-dependent conditions for monotonic convergence of uncertain ILC systems: An LMI approach

Delay-dependent conditions for monotonic convergence of unce...

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IEEE Conference on Decision and Control

作者： Deyuan Meng Yingmin Jia Junping Du Fashan Yu Seventh Research Division the Department of Systems and Control Beihang University Beijing China Beijing Key Laboratory of Intelligent Telecommunications Software and Multimedia School of Computer Science and Technology Beijing University of Posts and Telecommunications Beijing China School of Electrical Engineering and Automation Henan Polytechnic University Jiaozuo Henan China

ISBN: (纸本)9781424477456

This paper deals with the iterative learning control (ILC) problem for uncertain time-delay systems (TDS). In order to ensure monotonic convergence of the ILC process, a sufficient condition is developed using an H ∞ -based framework. It shows that under this framework, the convergence condition is enabled to be delay-dependent and have a formulation in terms of linear matrix inequalities (LMIs). Moreover, formulas for the updating law design can be derived by directly solving LMIs. A numerical example is provided to verify that the delay-dependent condition in LMI forms is effective in producing monotonically convergent ILC algorithms.

关键词： Convergence Symmetric matrices Robustness Delay Uncertainty Performance analysis Linear matrix inequalities

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GaN High Electron Mobility Transistors with Localized Mg Doping and Drain Metal Extension

GaN High Electron Mobility Transistors with Localized Mg Dop...

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2010 10th IEEE International Conference on Solid-State and Integrated Circuit Technology(第十届固态和集成电路技术国际会议 ICSICT-2010)

作者： Gang Xie Bo Zhang Fred Y. Fu W.T.Ng The Edward S. Rogers Sr. Department of Electrical and Computer Engineering University of Toronto Tor State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Scienc Microelectronics TCAD Crosslight software Inc. 121-3989 Henning Dr. Burnaby BC Canada V5C 6P8 The Edward S. Rogers Sr. Department of Electrical and Computer Engineering University of Toronto Tor

ISBN: (纸本)9781424457977

A Magnesium Doped Layer (MDL) under the 2-DEG channel and a Drain Metal Extension (DME) are proposed to provide a new degree of freedom in the optimization between breakdown voltage (BV) and specific-onresistance (Ron-sp) in AlGaN/GaN HEMTs. The surface electric field of the proposed structure is distributed more evenly when compare to the MDL-only structure with the same dimensions. A breakdown voltage of 1390V with specific-on-resistance of 4mlicm2 was obtained with LM=lμm, a peak concentration of 8×1017cm-3, Lpd=3μm and a drift region length of 10μm. Comparing with the conventional MDL-only HEMT structure, the MDL-DME is shown to deliver comparable specific-on-resistance while featuring a 54％ BV improvement without any area overhead penalty.

关键词： High electron mobility transistors Degree of freedom Breakdown voltage drain device Best value proposed structure Metals gallium nitrate Magnesium

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Electrical Breakdown Properties of Oil-Paper Insulation under AC-DC Combined Voltages

Electrical Breakdown Properties of Oil-Paper Insulation unde...

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IEEE International Power Modulator and Hogh Voltage Conference

作者： Yan Wang Jian Li Youyuan Wang Stanislaw Grzybowski State Key Laboratory of Power Transmission Equipment and System Security and New Technology College of Electrical Engineering Chongqing University High Voltage Laboratory Department of Electrical and Computer Engineering Mississippi State University

ISBN: (纸本)9781424471317

Oil-impregnated paper is a major type of insulation in oil-filled power transformers. In converter transformers, windings connected with converter valves have to withstand AC and DC combined voltages. This paper presented the experimental research on electrical breakdown properties of oilpaper insulation under AC-DC combined voltages. Electrical breakdown strength of oil-paper insulation specimens was measured through short-time tests under AC, DC, and AC-DC combined voltages. The combined voltages consisted of two different ratios of the AC to DC voltages. Through the constant-stress tests, the times-to-breakdown of oil-paper specimens were measured. Weibull parameters of the times-to-breakdown of specimens were estimated and the inverse power and exponential failure models of the specimens were presented.

关键词： Converter transformer Oil-paper insulation AC-DC combined voltage Electrical breakdown Failure model

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