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Design of detecting metal signal weak change detection circuit

Design of detecting metal signal weak change detection circu...

引用

International Conference on Electric Information and Control engineering

作者： Xiao, Ming Ge, Liangquan Institute of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu China

ISBN: (纸本)9781424480395

In this paper, AD637 Root Mean Square (RMS) chip is used to convert the induced voltage signal in the coil into DC signals. A differential amplifier is used to convert the fast DC signal into a pulse signal with the difference time of capacitor charging and discharging. Then amplifying again and a window comparator was used to process the signal into a digital signal. Thus the data acquisition task of security doors is completed. The whole design had many features, such as high anti-jamming ability, high sensitivity, and so on. It can detect a dime size of the metal for 40 cm range. © 2011 IEEE.

关键词： Differential amplifiers

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Windows-based long-range ordering system

Windows-based long-range ordering system

引用

International Conference on Electric Information and Control engineering

作者： Li, Fei Ge, Liangquan Institute of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu China

ISBN: (纸本)9781424480395

with the development of the network, people are more and more dependent on it and also have higher requirements on its convenience and manipulation. Based on Windows platform, long-range ordering system, which has taken advantage of Internet, enables people to select menu and to order food by local computer, meanwhile, no matter at any restaurant which is accessible to Internet, people could transfer and copy the menu. Different restaurant could set various passwords to operate the system. Ordering food and delivery service benefit much from visible interface as well as simple operation. © 2011 IEEE.

关键词： automation IP networks Internet Internet Internet Logic gates Operating systems Personal digital assistants Windows platform Windows platform food delivery service long-range ordering long-range ordering system operating systems (computers) order processing restaurant retail data processing service industries visible interface

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P2P File Search System Based on RealPeer

P2P File Search System Based on RealPeer

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2011 IEEE International Conference on Anti-Counterfeiting Security and Identification(2011防伪、安全及鉴定国际会议 ASID2011)

作者： Lei You Zhongwen Li Jun Hu Fang Fang Jian Liu College of Applied Nuclear Technology and Automation Engineering Chengdu University of TechnologyC College of Information Science and Technology Chengdu University Chengdu China 610106 College of Applied Nuclear Technology and Automation Engineering Chengdu University of TechnologyC Department of Computer Science Xiamen University Xiamen China 361005

ISBN: (纸本)9781612846316

In P2P network, the search function of file resources is one of the important reasons for its rapid development. It brings users convenience and is faced with many safety problems as well. This paper presents a P2P file search system based on the RealPeer framework and a P2P system performance test platform is simulated. Using the CL-PKC security authentication mechanism and LDAP, the search system has realized the peer identification and the effective authentication for the file information transferred, and has ensured the integrity and reliability of data. It provides a new solution for the P2P network file search system.

关键词： P2P RealPeer file search system LDAP

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A new scheme for preprocessing image sequence in wearable vision system

A new scheme for preprocessing image sequence in wearable vi...

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作者： Han, Lu Xue, Fangzheng Li, Zushu Chen, Dongyi College of Automation Chongqing University Chongqing 400044 China School of Automation Engineering University of Electronic Science and Technology of China Chengdu 610054 China

ISBN: (纸本)9783642197116

Cameras' miniaturization enable us feasible to capture photos and video at anywhere and anytime, even we wear them on human body and look the world in egocentric point of view. However, image quality degradation is caused by various factors in wearable environment, preprocess image acquired in wearable vision system is an unavoidable step. In this paper, we propose a new scheme to preprocess image sequence according to different quality of image frames in contiguous sequence. Firstly we detect image quality using hybrid methods, then classify them into some categories and given corresponding preprocess policy. We present experiment on a dataset collected within a cluttered environment, a prototype implementation validates its validity. © 2011 Springer-Verlag Berlin Heidelberg.

关键词： Image quality

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贵州西部二叠系玄武岩古风化壳常量元素地球化学特征研究

贵州西部二叠系玄武岩古风化壳常量元素地球化学特征研究

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第四届全国应用地球化学学术会议

作者： Zhang Hai 张海 He Minyou 何明友 Lu Qifu 卢啟富 Guo Peipei 郭佩佩 Li Yuanyuan 李媛媛 Zhou Guanghang 周光红 College of Nuclear Technology and Automation Engineering Chengdu University of TechnologyChengdu 6 成都理工大学核技术与自动化工程学院四川成都610059 贵州地矿局一一三地质大队贵州六盘水553001 College of Nuclear Technology and Automation Engineering Chengdu University of TechnologyChengdu 6 成都理工大学核技术与自动化工程学院四川成都610059 113 Geological Party Guizhou Bureau of Geology and Mineral Exploration & DevelopmentLiupanshui 5530 贵州地矿局一一三地质大队贵州六盘水553001

辉石和长石是玄武岩的主要矿物成分,辉石为含Fe,Ti,V等元素矿物,长石为富铝矿物。二叠系玄武岩火山间歇期间,大气中的强酸性气体被雨水转移到地表水之后就变为饱含CO2气雨水。在温暖至湿热的气候条件下,饱含CO2气雨水造成玄武岩中的富... 详细信息

辉石和长石是玄武岩的主要矿物成分,辉石为含Fe,Ti,V等元素矿物,长石为富铝矿物。二叠系玄武岩火山间歇期间,大气中的强酸性气体被雨水转移到地表水之后就变为饱含CO2气雨水。在温暖至湿热的气候条件下,饱含CO2气雨水造成玄武岩中的富铝矿物分解首先形成高岭石、埃洛石等粘土矿物,而Fe,Ti,V等元素也因辉石等矿物的分解而迁移出来,并在高岭石等粘土矿物形成的吸附障中富集。与此同时,含铁矿物氧化分解形成针铁矿及赤铁矿。在雨量充足、海侵事件等的作用下,水位较高,风化壳下部处于较还原的条件下,铁被还原成易溶的二价状态或在有机质的作用下迁出风化壳,并在合适的地质条件(向斜构造)下富集,造成Fe(Ti,v)—铝等元素分离,并伴随铁矿、铝土矿的形成。

关键词：玄武岩风化壳矿物成分地球化学特征构造演化

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The desgin of embedded SQLite3 and application of Commodity Rapid Positioning System based on Wi-Fi technology

The desgin of embedded SQLite3 and application of Commodity ...

引用

International Conference on Uncertainty Reasoning and Knowledge engineering (URKE)

作者： He Jianfeng Liu Lin Zhang Wei He Yueshun Liu Xiong College of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu China College of Software engineering East China University of Science and Technology Nanchang China

With development of embedded database technology, network performance of mobile-device and standardization of data management have a significant change. For characteristics of high reliability and real-time that Wi-Fi Commodity Rapid Positioning System terminal has, embedded database SQLite3 is proposed to manage system bulk data like storing, operating maintaining. Combined with enterprise requirement, this paper analyses the processing in database design and SQLite3 operate procedure under ARM-WindowsCE5.0. Besides the detail of porting SOLite3 based on ARM-Windows CE5.0 is also stated in the paper. Finally the test results show that SQLites3 embedded in the Product Rapid Positioning System is stable and reliable.

关键词： Databases Mobile communication Software Reliability Virtual machining Engines Libraries

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Risk Summarization

Risk Summarization

引用

International Conference on Computational and Information Sciences (ICCIS)

作者： Yu Wang Xianguo Tuo College of Information Science and Technology Chengdu University of Technology Chengdu China College of Nuclear technology and automation enginerring Chengdu University of Technology Chengdu China

Risk management includes phases such as risk identification, risk assessment and risk control. Little work has focused on risk summarization, which is a useful phase of risk management. Risk summarization means a list of occurred risks, risk summarization can also means relative documentation for risk management actions. This study presents summarization indices to evaluate the risk management efficiency. The indices include expected success rate, risk identification ratio, actual key risk ratio, actual key risk identification ratio, etc. The study aims at helping to fill a vacancy of risk summarization in risk management domain.

关键词： Risk management Software Planning Educational institutions Programming Mathematical model Computational modeling

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Two-switch three-level discontinuous conduction mode boost rectifier design

Two-switch three-level discontinuous conduction mode boost r...

引用

2011 IEEE Power engineering and automation Conference, PEAM 2011

作者： Du, Yun-Feng Mei, Ying Communication and Electric Engineering College Hunan University of Arts and Science Changde China Automation School University of Electronic Science and Technology of China Chengdu China

ISBN: (纸本)9781424496884

Front-end converters for distributed power system (DPS) applications are extensively used in telecommunication systems to supply load converters and to charge batteries to provide backup energy during power grid blackouts. This paper explores the main features of the two-switch three-level boost rectifier operated in discontinuous conduction mode (DCM). The main contributions are reduced voltage stress and improved efficiency. Control strategies and design guidelines are provided in this paper. Because of the voltage stress reduction brought about by using a three-level topology, MOSFETs can be used to simultaneously increase the switching frequency and efficiency of the power factor correction (PFC) circuit. The discussion is supported by simulation results obtained from a 6.3kW prototype. © 2011 IEEE.

关键词： Electric rectifiers

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Research on capture performance of CDMA2000 reverse link

Research on capture performance of CDMA2000 reverse link

引用

IEEE International Conference on Communication Software and Networks

作者： Xu, Bo Wang, Yueke Chen, Li Peng, Qin College of Mechatronics Engineering and Automation National University of Defense Technology Changsha Hunan 410073 China Department of Sports Economy Management University of Chengdu Sport Chengdu Sichuan 61004 China

ISBN: (纸本)9781612844855

This paper analyzes characteristics of CDMA2000 reverse link HPSK modulation pattern, establishes the model of mobile station transmitted signals and observation station received signal and deduces flow of capture using R-PICH. In order to analyze quantitatively the influence to capture performance of detection threshold, integration time, signal-to-interference ratio and vestigial carrier, in the Neyman-Pearso criterion, the functional relationship between false-alarm probability and detection probability and the computational formula, are deduced, which provides theoretical support for optimal design of parameters. Aim at the impact of inserted forward power control group and vestigial carrier, the solution of short-term coherent integration associating with long-term incoherent accumulate is proposed, and the calculation method of capture performance in this mode is deduced. Simulation results show that the scheme can achieve stable capture toward mobile station under low SNR and effectively promote capture performance. © 2011 IEEE.

关键词： Signal to noise ratio

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GLRT-based detection in SIRV clutter with steering vector mismatches

GLRT-based detection in SIRV clutter with steering vector mi...

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作者： Dai, Xin Cui, Guolong Kong, Lingjiang College of Automation Chongqing University Chongqing China School of Electronic Engineering University of Electric Science and Technology of China Chengdu China

ISBN: (纸本)9788955191554

This paper mainly deals with the problem of detecting a target in SIRV clutter with steering vector mismatches. Assuming that the mismatch of the steering vector is satisfied the conic constraint, the generalized likelihood ratio test (GLRT) is devised, and the geometry explain is presented for the derived solution. Meanwhile, fixed point estimate (FPE) of the covariance structure is adopted using the secondary data. Finally, we assess the performance of the derived test by Monte Carlo techniques, and several numerical results show that the derived test is consistent with the famous normalized matched filter (NMF), and has the ability to reject high mismatched signals. © 2011 Global IT Research Inst.

关键词： Clutter (information theory)

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