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5th international symposium on Photoelectronic Detection and Imaging, ISPDI 2013

ISBN: (纸本)9780819497765

the proceedings contain 182 papers. the topics discussed include: study on dark current of extended wavelength lnGaAs detectors;progress in the CdZnTe single crystal growth and substrates fabrication;technologies for thermal infrared imaging from GEO;design of static star simulator based on testing of very high accuracy star sensor;the design of real time infrared image generation software based on creator and Vega;application of infrared detection in condition-based maintenance for reactive compensation capacitor sets;vibration characteristics of aluminum material and its influences on laser Doppler voice acquisition;research of polarization imaging detection method for water surface target in foggy weather;the optical axis optimization in measurement of decentration of lens;an inverter-based capacitive trans-impedance amplifier readout with offset cancellation and temporal noise reduction for IR focal plane array;a dual-channel fusion system of visual and infrared images based on color transfer;a new polarization image fusion method based on choquet fuzzy integral;and experiment research on infrared targets signature in mid and long IR spectral bands.

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Numerical simulations of high power near-infrared supercontinuum generation from a nonlinear fiber amplifier

Numerical simulations of high power near-infrared superconti...

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5th international symposium on Photoelectronic Detection and Imaging (ISPDI) - High Power Lasers and Applications

作者： Song, Rui Hou, Jing Wang, Yan-Bin Jin, Ai-Jun Guo, Liang Lu, Qi-Sheng Natl Univ Def Technol Coll Optoelect Sci & Engn Changsha 410073 Hunan Peoples R China Peoples Liberat Army Unit 63892 Luoyang 471003 Henan Peoples R China

ISBN: (纸本)9780819497734

Photonic crystal fiber has been widely used in visible and near-infrared supercontinuum generation due to its flexible dispersion control and high nonlinearity. However, the maximum average output power of supercontinuum from a photonic crystal fiber has not exceed one hundred watt owing to the small core diameter of the photonic crystal fiber and the low coupling efficiency between the pump and the photonic crystal fiber. Recently, supercontinuum generation directly from a nonlinear fiber amplifier attracts lots of attention as a result of its simple structure and low splicing loss and many excellent results have been achieved either in low and high average power, which is proved to be a promising method to realize kilowatt level high power near-infrared supercontinuum. However, the numerical study on high power near-infrared supercontinuum generation from a nonlinear fiber amplifier has been rarely reported, so there is great necessity to carry out some theoretical study on it. In this paper the complex Ginzburg-Landau equation is used to describe the formation and propagation of high power near-infrared supercontinuum generation in a nonlinear fiber amplifier. the chromatic dispersion of the ytterbium-doped fiber is measured by a Mach-Zehnder interferometer. the roles of the small signal gain, input pulse width and initial chirp of the input pulse played on the continuum formation are analyzed in detail. the results are in good agreement with the experiments which can provide some theoretical guidance on future optimization of the flatness and width of the supercontinuum generation from a nonlinear fiber amplifier.

关键词： Supercontinuum fiber amplifier near-infrared Ginzburg-Landau equation ytterbium-doped fiber

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Automatic generation of intersection topologies using numerous GPS traces

Automatic generation of intersection topologies using numero...

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IEEE international symposium on Wireless Vehicular Communications (WiVeC)

作者： Andreas von Eichhorn Peter Zahn Dieter Schramm BMW Group Research and Technology Munich Germany Institute of Mechatronics University Duisburg-Essen Duisburg Germany

To provide reliable assistance to drivers at intersections, a priori information has to be supplied to so-called Cooperative Intersection Collision Avoidance Systems (CICAS), such as lane geometry, admissible turning maneuvers, and the areas where the paths of traffic participants typically cross. In the implementation of the CICAS of the project sim TD , this information is stored in the intersection topology and transmitted via a wireless network to vehicles approaching an intersection. To achieve high coverage, timeliness and precision of the stored data at the same time, an approach to automatic generation of intersection topologies from noisy measurements is applied, which is based on B-spline curve approximation.

关键词： Splines (mathematics) Vehicles Topology Approximation methods Turning Noise measurement optimization

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Upgrade of Mode-K Strategy for Daily Load-Follow Operation of OPR1000

Upgrade of Mode-K Strategy for Daily Load-Follow Operation o...

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the 5th international symposium on Symbiotic Nuclear Power Systems (ISSNP2013)

作者： CHOE Jiwon PARK Minyong CHOI Sooyoung TAK Taewoo LEE Deokjung Interdisciplinary School of Green Energy UNIST

Nuclear energy is in charge of base load in Korea. After about fifteen years, the nuclear energy would be about 50% of whole energy. If electricity from one type of power generation exceeds 40% of total electricity, the power plant requires load follow operation. there is an automatic load follow logic called Mode-K which was developed in Korea. this logic was developed for KNGR(APR1400). this paper verifies mode-K simulation in APR1400 and upgrades mode-K logic in OPR1000 suitably.

关键词： Daily Load Follow Operation Mode-K MATLAB MASTER Core Analysis code OPR1000 YGN Unit3

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A research on the PSA analysis of Loss of Spent Fuel Pool Cooling in a third generation project

A research on the PSA analysis of Loss of Spent Fuel Pool Co...

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the 5th international symposium on Symbiotic Nuclear Power Systems (ISSNP2013)

作者： ZHEN Qiming ZHANG Bing WANG Yaodong Nuclear Island Department China Nuclear Power Design Company Overall Engineering Department China Nuclear Power Design Company

Post Fukushima nuclear accident in Japan in 2011 year, it becomes significant to do the Probability Safety Assessment(PSA) of Loss of Spent Fuel Pool Cooling(LSFPC). this article takes the IAEA(international Atomic Energy Agency) and ASME(American Society of Mechanical Engineers) technology methodologies to analyze the risk of the spent fuel pool loss of cooling in a third generation nuclear power plant project. these methodologies are not new creative means, but this paper is the first try to analyze the risk of LSFPC. there are two purposes of this paper. One is to present or introduce the general information on the characteristic of a third generation project PSA model and the modeling assumptions which are made during the model development. these information or experience may be useful for someone in other projects. the other purpose is to show the primary analysis results of the spent fuel pool to prove the safety in the PSA viewpoint and to show the advantage of PSA to give some advices on system optimization design. the following items are described in this paper: analysis range;success criteria;definition of the initiating event;event tree analysis;system fault tree analysis;pre-accident Human Reliability Analysis(HRA);post-accident HRA;test and maintenance unavailability. Five cases are calculated in this paper. that is LSFPC in non-refueling states, LSFPC in refueling states, LSFPC induced by Loss Of Offsite Power(LOOP) in non-refueling states, LSFPC induced by LOOP in refueling states and LSFPC induced by internal hazard in state A or B. At the last, the dominant contributors to LSFPC are analyzed, and some optimization design suggestions are given. It is shown that the PSA is a good ways to assess the risk of the spent fuel pool.

关键词： PSA Loss of Spent Fuel Pool Cooling

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Research on AP1000 passive residual heat removal system using RELAP5 code

Research on AP1000 passive residual heat removal system usin...

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the 5th international symposium on Symbiotic Nuclear Power Systems (ISSNP2013)

作者： XIANG Xiao-qin ZHAO Qiang College of Nuclear Science and Technology Harbin Engineering University

As a generation Ⅲ+ reactor, AP1000 employs a series of passive safety systems which rely only on natural forces such as gravity, natural circulation and compressed gas, to enhance plant safety. Passive heat removal system(PRHR) is one component of the passive core cooling system in AP1000. To understand its mechanism and make preparation for the further full plant modeling, a RELAP5 model which represents all of the major primary, secondary and PRHR components is developed. the steady-state results indicate that the main thermal-hydraulic parameters obtained by RELAP5 model agree well with the AP1000 rated values. the transient results show that the PRHR system is able to provide a considerable period of residual heat removal and keep the core water level and primary system pressure under control. the PRHR system effectively postpones the accident chronology and reduces the operator action due to its passive feature, which is important to ensure the safety of AP1000 during the small break LOCA transients.

关键词： AP1000 passive residual heat removal system RELAP5

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thermomechanical stress analysis of dissimilar welded joints in pipe supports: Structural assessment and design optimization

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ENGINEERING FAILURE ANALYSIS 2012年 26卷 31-49页

作者： Collini, L. Giglio, M. Garziera, R. Univ Parma Dept Ind Engn I-43100 Parma Italy Politecn Milan Dept Mech I-20156 Milan Italy

In this paper, the authors apply the ASME Boiler & Pressure Vessel code to the structural assessment and design optimization of dissimilar welded joints subjected to transitory thermo-mechanical loads. the verification is based on the finite element stress linearization methodology. A large number of dissimilar P22/P91 steel welded joints of a power generation plant are taken into consideration. the joints vary in geometrical and operational conditions. In comparison with experimental investigations on some damaged structures, the methodology proves to be feasible, easily implemented, and reliable. Further, a second relevant result is obtained using the validated method to perform an optimization of the geometry of the joints for a safer design. (C) 2012 Elsevier Ltd. All rights reserved.

关键词： Structural integrity assessment Dissimilar welds Creep resistant steel Coupled thermomechanical FEA Stress linearization

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Global Load Instruction Aggregation Based on code Motion

Global Load Instruction Aggregation Based on Code Motion

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5th international symposium on Parallel Architectures, Algorithms and Programming (PAAP)

作者： Sumikawa, Yasunobu Takimoto, Munehiro Tokyo Univ Sci Dept Informat Sci Chiba Japan

ISBN: (纸本)9780769548982;9781467345668

Most modern processors have some much faster cache memories than a main memory, and therefore, it is important to effectively utilize it for the efficient execution. the cache memories work well through enhancing temporal or spatial localities in the program. therefore, the cache efficiency can be improved by making accesses to the same array or structure continuous. We propose the new cache optimization technique improving cache efficiency based on global code motion. Our technique moves a load instruction immediately after other preceding load instructions accessing the same array or structure, and then delays it as later as possible without changing the access order. the two step code motions enable not only globally improving the cache efficiency in the entire program with any control structure, but also suppressing register pressure. We have implemented our technique in a real compiler, and evaluated it on SPEC benchmarks. the experimental results show that our technique can decrease cache misses about 94% in the best case.

关键词： cache memory code motion partial redundancy elimination register pressure data flow analysis

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optimization of Solar Power by Azimuthal Angle and Neural Network Control of a PV Module

Optimization of Solar Power by Azimuthal Angle and Neural Ne...

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IEEE 5th India international Conference on Power Electronics (IICPE)

作者： Dubey, Rahul Joshi, Dheeraj NIT Kurukshetra Kurukshetra Haryana India DTU Elect Engn New Delhi India

ISBN: (纸本)9781467309349

In recent year's renewable energy sources have become a useful alternative for the power generation. Moreover conventional sources cause the pollution and global warming. In this work, the sun tracking algorithm is developed to track sun position to receive maximum radiation. DC power from solar panel is fed to the buck-boost converter for the adjustment of voltage at load end. the mathematical modeling of system component is done in MATLAB code. For maximum power point tracking artificial intelligent tools such as artificial neural network (ANN) is used. In this proposed system two control algorithms is applied simultaneously to get maximum power at output end. the complete system efficiency is obtained. System analysis is done in Kurukshetra India, so the latitude angle is taken accordingly.

关键词： Sun position tracking artificial neural network PV module dc-dc converter

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An Ultralightweight Mutual Authentication Protocol for EPC C1G2 RFID Tags

An Ultralightweight Mutual Authentication Protocol for EPC C...

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5th international symposium on Parallel Architectures, Algorithms and Programming (PAAP)

作者： Huang, Yu-Chung Jiang, Jehn-Ruey Natl Cent Univ Dept Comp Sci & Informat Engn Jhongli Taoyuan County Taiwan

ISBN: (纸本)9780769548982;9781467345668

the radio frequency identification (RFID) system is vulnerable to various attacks, since data transmission between the reader and tags is based on wireless communication. Typical attacks are the forged-reader attack, forged-server attack, man-in-the-middle attack, tracking attack, replay attack, forward secrecy attack and denial of service attack, etc. Some methods like Karthikeyan-Nesterenko's scheme, Chien-Chen's scheme, and Chien's scheme have been proposed to resist the attacks. the methods still have some flaws, though. In this paper, we proposed a mutual authentication protocol between the reader and tags conforming EPC Class 1 generation 2 (EPC C1G2) standard to resist the attacks just mentioned. the challenge is that EPC C1G2 tags have limited memory and can perform only ultralightweight operations like the random number generation, pseudo random number generator (PRNG) and exclusive-or (XOR) operator. We will conduct thorough security analysis for the developed protocol and comprehensively compare it with other related methods to demonstrate it is indeed better than others.

关键词： Radio Frequency Identification (RFID) Electronic Products code (EPC) Security Privacy Mutual Authentication

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