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Spatial data dynamic balancing distribution method for parallel spatial database

Spatial data dynamic balancing distribution method for paral...

引用

2009 International Conference on Information engineering and Computer Science, ICIECS 2009

作者： Zhou, Yan Zhu, Qing Zhang, Yeting College of Automation University of Electronic Science and Technology of China Chengdu China State Key Laboratory of Information Engineering in Surveying Mapping and Remote Sensing Wuhan University Wuhan China

ISBN: (纸本)9781424449941

Spatial data balancing distribution can evidently improve the performance of parallel spatial database in shared nothing parallel architecture. Considering spatial locality and unstructured variable length characteristics of spatial data, this paper proposes a dynamic spatial data balancing distribution method under shared nothing parallel database environment. By using Hilbert ordering code to keep spatial locality relationship between spatial objects, the presented method can fulfill spatial data static balancing distribution status, which depends on hierarchically decomposing Hilbert space-filling curve code to allocate approximately even spatial data volume to parallel nodes in distributed network. Then spatial proximity index is introduced to resolve spatial data unbalancing problem caused by spatial database dynamic updating. Through moving spatial data fragments to goal node which is the minimum spatial proximity with data moving out node, the spatial database redistributing strategy can attain dynamic data balance among all network parallel nodes. Our experimental results show that the proposed method can effectively improve parallel performance deterioration resulted from spatial data unbalancing and achieve spatial data dynamic balancing distribution in parallel spatial database. ©2009 IEEE.

关键词： Parallel architectures

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Research on role-authorized and MVC-based content management

Research on role-authorized and MVC-based content management

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International Conference on Management and Service Science, MASS 2009

作者： Li, Cong Li, Ma Dong, Ke School of Computer Science Sichuan Normal University Chengdu China Business College China West Normal University Nanchong China School of Electrical Engineering and Automation Hefei University of Technology Hefei China

ISBN: (纸本)9781424446391

Nowadays many Ecommerce corporations need to implement effective content management for controlling the data resources of their websites. In this paper, a role-authorized and MVC-based content management method is proposed. Firstly, the presentation mechanism of content management is designed based on MVC model. Secondly, the system users is separated into three types, including system administrator, content manager and visitor, then a role-authorized model is designed. The proposed method can bring good performance to the content management of E-commerce corporations. ©2009 IEEE.

关键词： Electronic commerce

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A blind extraction algorithm of periodic and statistically independent signals

A blind extraction algorithm of periodic and statistically i...

引用

9th International Conference on Electronic Measurement and Instruments, ICEMI 2009

作者： Yunxia, Li Changyuan, Fan School of Automation University of Electronic Science and Technology of China Chengdu China College of Electronic Engineering Chengdu University of Information Technology Chengdu China

ISBN: (纸本)9781424438624

The extraction of periodic and statistically independent signals is discussed. This problem can be modelled from the perspective of blind source extraction. An algorithm is proposed to extract such kind of signal from mixture signals. Since the desired signal is independent to other components, and at the same time it is periodic or quasi-periodic, its periodicity characteristic and independent property can be used to realize extraction. Simulation results verify the good performance of the proposed approach. ©2009 IEEE.

关键词： Independent component analysis

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A Novel Variable-Boundary-Coded Quantum Genetic Algorithm for Function Optimization

A Novel Variable-Boundary-Coded Quantum Genetic Algorithm fo...

引用

IEEE International Symposium on Dependable, Autonomic and Secure Computing (DASC)

作者： Hegen Xiong Kai Xiong Qiuhua Tang College of Mechanical Automation Engineering Wuhan University of Science and Technology Wuhan China School of Automation Engineering University of Electronic Science and Technology Chengdu China

Quantum genetic algorithm is a recently proposed new optimization algorithm combining quantum algorithm with genetic algorithm. It characterizes good population diversity, rapid convergence and good global search capability and so attracts serious and wide attentions. This paper proposes a novel quantum genetic algorithm called variable-boundary-coded quantum genetic algorithm (vbQGA) in which qubit chromosomes are collapsed into variable-boundary-coded chromosomes instead of binary-coded chromosomes. In this way we can obtain much shorter chromosome strings. The method of encoding and decoding of chromosome is first described before a new adaptive selection scheme for angle parameters used for rotation gate is put forward based on the core ideas and principles of quantum computation. Eight typical functions are selected to optimize to evaluate the effectiveness and performance of vbQGA against standard genetic algorithm (sGA) and genetic quantum algorithm (GQA) proposed. The results show that vbQGA is significantly superior to sGA in all aspects and outperforms GQA in robustness and solving velocity, especially for multidimensional and complicated functions.

关键词： Genetic algorithms Quantum computing Biological cells Quantum mechanics automation Genetic engineering Educational institutions Diversity reception Encoding Decoding

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Adaptive Control of Nonlinear Continuous-Time Systems

Adaptive Control of Nonlinear Continuous-Time Systems

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International Workshop on Intelligent Systems and Applications, ISA

作者： Lin Niu Binghong Ye College of electrical and information engineering University of Chengdu Chengdu China College of electrical engineering and automation Kunming University of technology Kunming China

A direct adaptive control method with a simple identification of the controller parameters is presented for a class of uncertain time-varying nonlinear systems. The systems are divided into a finite number of subsystems, which are interpolated by functions of an exogenous scheduling variable. The adaptive method yields stability of all signals in the closed-loop, as well as convergence of the state vector to a residual set around the equilibrium, whose size can be set by the choice of several design constants. The effectiveness of the presented method with global convergence and less plant information is demonstrated by simulation results.

关键词： Adaptive control Nonlinear systems Nonlinear dynamical systems Educational institutions Time varying systems Convergence Dynamic scheduling Neural networks Backstepping Programmable control

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Key technology in three-dimensional modeling for cultural heritages

Key technology in three-dimensional modeling for cultural he...

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2009 International Conference on Information engineering and Computer Science, ICIECS 2009

作者： Cheng, Gang Jia, Zelu Lu, Xiaoping Li, Anjing School of Surveying and Land Information Engineering Henan Polytechnic University Key Laboratory of Mine Spatial Information Technologies Jiaozuo China College of Automation University of Electronic Science and Technology of China Chengdu China Guangzhou OK Geographical Information Technology Co .Ltd. Guangzhou China

ISBN: (纸本)9781424449941

In this paper, we started from the point of digital preservation and development of large-scale cultural heritage by combining the Global Positioning System (GPS) technology, the traditional single-point measurement with high speed, high-precision three-dimensional (3D) laser scanning technology. GPS and the traditional single-point measurement are used to establish control network to local landscape model into a union space coordinate system in order to study the distribution and evolution of its situation;while 3D laser scanning technology is used to get the accurate geometric description of the cultural heritage. By using post-processing software the point clouds data can be handled to establish the 3D visual model and two-dimensional line draw model which lay the foundation for heritage preservation and future research. The digital preservation of the 'Dr. Sun Yat-sen's Memorial Hall' was presented as a case study in this paper to verify the advantages of digitization by 3D laser scanning. ©2009 IEEE.

关键词： Global positioning system

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Model-Based Diagnosis for Pre-Stress of Langevin Transducers

Model-Based Diagnosis for Pre-Stress of Langevin Transducers

引用

IEEE Circuits and Systems International Conference on Testing and Diagnosis, ICTD

作者： Bo Fu Ting Li Yongle Xie College of Manufacturing Science and Engineering Sichuan University Chengdu China School of Automation Engineering University of Electronic Science and Technology Chengdu China

The performance of Langevin transducers may be degraded if incorrect mechanical pre-stress is applied. A model-based diagnosis method for the pre-stress of Langevin transducers is studied. An equivalent circuit is used to model the transducer. Based on the measured electrical admittances of transducers for various pre-stress levels, the parameters of the equivalent circuit model were identified by using nonlinear least-square estimation techniques. The model parameter sensitivity with respect to varying pre-stress was analyzed. The result shows the modal damping and admittance maximum have higher sensitivity and are suitable for the diagnosis of transducer pre-stress.

关键词： Equivalent circuits Admittance Piezoelectric transducers Resonance Ultrasonic transducers Degradation Electric variables measurement Damping Parameter estimation Resonant frequency

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Experiment and Simulation of Transistor Level Fault Model of IDDT Test

Experiment and Simulation of Transistor Level Fault Model of...

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2009 International Conference on applied Superconductivity and Electromagnetic Devices(应用超导与电磁装置技术国际会议 ASEME 2009)

作者： Dajin Yu Shuyan Jiang Yongle Xie Gang Luo School of Automation Engineering University of Electronic Science and Technology of China Chengdu C Mechanical Engineering Department Chengdu Electromechanical College Chengdu China

Fault and fault model is the fundament of IC diagnosis. Fault model based on IDDT and its test is the hot issue of modern IC fault diagnosis at present. Open and short fault models of inverter, NAND gate, and SRAM of CMOS technology were built in this paper. In the experiments, we selected the deep sub-micron of 0.18 μm CMOS technology to simulate with HSPICE. The simulations of IDDT waveforms and FFT transform waveforms of different fault models were made and the results were indicated that the IDDT test method can detect the open and short fault of CMOS devices effectively.

关键词： IDDT COMS technology fault mode HSPICE

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Development of Driving Program of Wiring Harness Based on S3C44B0

Development of Driving Program of Wiring Harness Based on S3...

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2009国际通信电路与系统学术会议(ICCCAS 2009)(2009 International Conference on Communications，Circuits and Systems)

作者： Shuyan Jiang Gang Luo School of Automation Engineering University of Electronic Science and Technology of China Chengdu Mechanical Department Chengdu Electromechanical College Chengdu 610054 China

ISBN: (纸本)9781424448876;9781424448883

Now 32 bit embedded RISC microprocessor is used more largely with the development of IC industry. ARM microprocessor is a good choice for an embedded system. It provides many different kinds of interfaces for special application. In this paper, an embedded uClinux system based on ARM has been developed. We have successfully transplanted uClinux operating system into ARM hardware platform, and gave the developing and loading code of the uClinux device driver and the flow chart. We researched the whole process of how to develop embedded system drivers by designing the wiring harness testing instrument.

关键词： WIRING HARNESS Embedded systems macroprocessor device drivers photographic applications Hardware Platform

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Research on the Characteristic Test of Via Holes in Microwave Circuits

Research on the Characteristic Test of Via Holes in Microwav...

引用

IEEE Circuits and Systems International Conference on Testing and Diagnosis, ICTD

作者： Yu Tian Yu Liu Ling Tong Jinxian Liu College of Automation Engineering University of Electronic Science and Technology Chengdu China National Key Laboratory for Electronic Measurement Technology Qingdao China

The detailed design and analysis for measuring characteristics of via holes in microwave circuits are presented, including the design of devices under test(DUT) and the test fixtures. Then the methodology of de-embedding based on TRL calibration is introduced which can help to extract the scattering parameters of via holes from the original measured data. The methodology including design, measurement and analysis will help the study of microstrip via holes.

关键词： Circuit testing Microwave circuits Microwave devices Microwave measurements Fixtures Calibration Data mining Scattering parameters Design methodology Microstrip

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