bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on Deadbeat Control for Three-Phase Grid-Connected Inverter in Model Based Design
Authors: Han Gu Jing , Zou Meng , Min Wu Zhi
Published: December 2012

Using model based design(MBD) method, deadbeat control algorithm for three-phase grid-connected inverter was designed in optimization and realized in hardware. According to the advanced idea of MBD and its basic procedure, the software-in-loop(SIL) test, processor-in-loop(PIL) test and hardware-in-loop(HIL) test for deadbeat control algorithm were mainly researched under MATLAB/Simulink environment choosing TMS320F2812 as object hardware board. In such method, embedded codes could be produced automatically and the errors brought in through algorithm model could be tested and corrected earlier. Meanwhile, simply changing the PIL related modules, the self-defined deadbeat algorithm module could be flexibly applied in other hardware platforms. At last, the correctness and efficiency of deadbeat control algorithm were verified in three-phase grid-connected inverter experiment platform.
Relaxed T-S Fuzzy Control Design by Descriptor System Approach
Authors: Sun Chung Hsun , Yeh Yun Chi
Published: December 2012

In this paper, the descriptor system based concept is applied to the stabilization for a discrete T-S fuzzy system. The control input vector and state vector are combined to the descriptor system form which leads to fewer Lyapunov inequalities (lower computation demand) than traditional T-S fuzzy stability criteria. Also, the non-parallel distributed compensation (non-PDC) and slack variables are adapted to relax the proposed stability conditions. Finally, the computation effectiveness the proposed stability criterion is demonstrated by a numerical example.
Decoupling Control of Dynamic Emulation for Transmission Test Rig
Authors: Li Wen Li , Ke Jian , Deng Bin , Shi Xiao Hui , Zou Xi Hong , Yi Peng
Published: December 2012

The influence of electromagnetic coupling and mechanical coupling on control property in dynamic emulation system is analyzed. the coupled system is a dual-input dual-output system.The load torque changes will cause the variation of speed in the system and the speed changes also affect the variation of load torque. The mathematic model of the system based on decoupling control are given. The compensation module can be installed to the system in order to make subsystems almost independent of each other. Simulation and comparison is taken by MATLAB / Simulink software between decoupled system and original system. Result shows that the coupling control method can improve the precision of the control system and fasten response.
Control & Communication Link System Theory and Its Application on Pig Slaughter Control
Authors: Huang Jian Chun , Cai Ming Shan , Zhang Quan Xin
Published: December 2012

By applying CC-Link field bus theory and technique, the shortcoming of complex cabling and the problem of signal attenuation are solved in order to realize distributed control and centralized control. The CC-Link field bus structure characteristics and communication mode are detailed, the method of network hardware configuration, parameter setting and software configuration are given. Using the touch screen, the system can achieve real-time monitoring and fault alarming, as well as partial-area remote debugging. The application proves the correctness and feasibility. This control system is easy to install and maintain, saving cost and improving the reliability of the complete system.
Influence of Temperature Factor on Fluid–Structure Coupling Characteristics of Hydraulic Piping System
Authors: Peng Chuan Long , Wang Xiao Dong
Published: December 2012

The fluid-structure coupling vibration due to the output flow ripple of pump or water hammer phenomenon does harm to piping system. Multi-physics field factor, especially the thermal field, should be considered while the vibration characteristics are analysed. A novel mathematical model based on Wiggert and Hatfield’s method of characteristic (MOC) is constructed, which is used to describe the vibration characteristics of the pipeline system at different temperatures. A simulation using one classic problem of pressure jump from the upstream is performed to verify the relationship between the temperature and pipeline coupling vibration.
Influence of Turbulence Intensities onto Transmission Line Conductor Wind Loads
Authors: Dang Hui Xue , Yang Feng Li , Yang Jing Bo
Published: December 2012

The rationality of transmission line responses, tower responses, etc., are determined by the computed wind loads, which are directly correlated with the free-stream turbulences that generated at different ground roughness conditions, different terrains, etc.. Accounting for this problem, the flow fields around transmission line conductor LGJ630/45 are computed by solving Navier-Stokes equations to study the influence of Tis (turbulence intensities) onto wind load characteristics. The results show that, the peak-values of power spectrum density (PSD) results of both lift and drag are obviously influenced by TIs, while their corresponding frequencies are kept the same at different TIs; with the increase of Tis, the time-averaged value of conductor drag decreases nonlinearly and monotonically. Thus, given the influence of TIs onto wind loads, field observed free-stream values should be used as inputs for numerical simulations, and then the obtained wind loads can be adopted to accurately simulate transmission line gallopings and windage yaws.
Double Resonance Hybrid APF and the Compensating Simulating Analysis
Authors: Li Yan , Li Gang
Published: December 2012

A new topology of double resonance hybrid APF (DRHAPF) was researched, which can be adopted in 35KV high voltage system. The principle of DRHAPF was analyzed firstly. The harmonic suppressing function was used to analyze the harmonic suppressing performance of DRHAPF in the frequency field. The harmonic suppressing frequency performance of different parameters was obtained. The reactive power compensating performance of the system was also gotten. The simulating and experiment results prove the validity of DRHAPF.
Method of Moments (MoM) for the Analysis of Dielectric Double Periodic Structures
Authors: Zhao Shan , Zhang Nai Qian , Li Dong
Published: December 2012

The space-domain volume integral equation (VIE) method is presented for the analysis of three-dimension (3-D) scattering from dielectric frequency selective structures (DFSS) involved homogeneous and inhomogeneous lossy material. The method solves directly for the electric field in order to easily enable periodic boundary conditions in the spatial domain. The computation of the spatial domain periodic Green’s function (PGF) is accelerated by the modified Ewald transformation. Optimized interpolation procedures for the PGFs can be applied, resulting in a considerable reduction of matrix-filling time without any significant effect on the accuracy.
The Design and Simulation of IGBT Inverter Buffer Circuit
Authors: Mi Zhu , Liu Heng Kun , Zhang Xiao
Published: December 2012

In order to suppress the harmonic and protect the IGBT, an innovative buffer circuit for IGBT was designed and simulated in this paper. Compared with traditional buffer circuit, the proposed RCD buffer circuit is more reliable and can reduce the heat effectively when IGBT is turned off. The analytical expression of the buffer circuit is deduced by theoretical calculation. Finally, the performance of the presented buffer circuit was testified by simulation.
A Novel Technology in Surveillance Video for Detecting and Forecasting a Robbing Incident
Authors: Gao Da Peng , Zhu Qing Xing
Published: December 2012

In this paper, a novel technology, which detects and forecasts human's abnormal behavior, is proposed. Taking an abnormal behavior, the robbery, as an example, the accuracy of the technology is demonstrated successfully. There are 3 innovations in this paper. A) A robbery incident is divided into 5 phases occurred orderly. By its order, a robbery is detected. B) By human body's motion character, the human body's speeds are measured in different areas and at different times. It improves the accuracy rate of a classifier. C) The technology can forecast an abnormal human behavior in a short time advance. Experiment shows that the technology detecting and forecasting accuracy are high enough to be used in practice.
Study on Techniques of Hand Gesture Recognition
Authors: Mi Shou Fang , Li Ling Hua
Published: December 2012

This paper describes the study of techniques used in hand gesture recognition in sign language interpretation. The study is discussed from two aspects: the process of hand gesture recognition and the techniques of feature extraction in hand gesture recognition. The techniques of feature extraction in hand gesture recognition are grouped into five categories: Hidden Markov Model (HMM), Artificial Neural Networks (ANN), Support Vector Machines (SVM), Dynamic Bayesian Network (DBN), and Dynamic Time Warping (DTW). The main ideas and the application of each technique are described in detail.
FPGA-Based Implementation of Face Recognition Based on Gabor and DCT
Authors: Lai Guo Hong , Min Luo , Liu Song , Wang Xiao Fang
Published: December 2012

A face recognition method based on discrete cosine transform and Gabor transform is proposed. A FPGA-based platform on DE2-115 board is designed by SOPC. We compared our methods with the method based on PC. In the experiments, the nearest neighbor classifier is used to recognize different faces from the Yale face database. Experimental results show that the proposed
A Study on the Agent-Based Vehicles Dispatching Optimization at Container Terminals
Authors: Yan Nan Nan , Zheng Di
Published: December 2012

This paper mainly concentrated on the method of improving the dispatching trucks working at a container terminal and built the multi-agent model for the dispatching job. The contract net protocol was taken as the communication ones among agents, and the analytic hierarchy process was also applied for the decision support for container trucks dispatching.
CAN-Bus Communication Design for Automated Mechanical Transmission
Authors: Zhang Hong Kun , Li Wen Jun
Published: December 2012

The Transmission Control Unit (TCU) of Automated Mechanical Transmission (AMT) can not only control drive train to shift automatically but also communicate with other controller to achieve coordination control. In this paper, Controller Area Network (CAN) communication of AMT is designed by using Motorola Scalable CAN Module (MSCAN) integrated in MC9S12DP256 Microcontroller. CAN communication protocol, CAN interface circuit and software are developed.
Survey on Capacitive Current Measurement Principles for Automatic Tuning Arc-Suppression Coil
Authors: Chen Zhong Ren , Li Wei Bo , Xu Ping Fan
Published: December 2012

Accurately measuring capacitive current for the automatic tuning arc-suppression coil is the premise and basis of realizing its compensating and arc-extinguishing functions. Several principles measuring capacitive current applied widely are theoretically analyzed and compared. The resonance method to measure the capacitive current has high precision, but has complex tuning. The displacement voltage method has simple tuning, but has poor accuracy of measuring capacitive current. The measurement accuracy of the impedance triangle method and the E0 measurement method lies between the resonance method and displacement voltage method. And its tuning is also relatively simple, but its measurement and control system is more complex. At last, to choose appropriate capacitive current measurement method according to the arc-suppression coil tuning principle and the distribution network operation is pointed out.
Robot Handling System Based on Visual Information
Authors: Zhang Ming Zhu , Jia Xiao Min
Published: December 2012

In this paper, a robot handling system was developed with the functions of visual positioning and position adjustment by using the MOTOMAN-SV3X robot. System components, workflow, robot pose and the method of solving the problem of pick-up position deviation were detailed. An automated and flexible application program was provided for robot handling technology, and the problem that there was pick-up position deviation in the process of transporting workpiece can be effectively resolved, thereby handling precision and efficiency can be improved.
PID Parameter Optimization in Joint Control of Air Duct Cleaning Robot
Authors: Zhou Zhi Wei , Sun Wei , Wang Cong , Zhu Qian
Published: December 2012

To improve the joint control of the air-duct cleaning robot, an advanced control strategy of the brushless DC motor has been proposed to substitute the traditional PID control. The novel optimization algorithm based on the improved particle swarm optimization (PSO) is used to modify the normal incomplete derivative PID algorithm and globally optimize its parameters. Simulation results show that the proposed algorithm achieves a well control performance and can effectively satisfy the high accuracy and real-time requirement of the air-duct cleaning robot.
Design and Realization of Experimental Autonomous Driving System Based on Neural Network Control
Authors: Kong Qing Fu , Zeng Fan Ming , Wu Jie Chang , Wu Jia Ming
Published: December 2012

Intelligent vehicle is an attractive solution to the traffic problems caused by automobiles. An experimental autonomous driving system based on a slot car set is designed and realized in the paper. With the application of a wireless camera equipped on the slot car, the track information is acquired and sent to the controlling computer. A backpropogation (BP) neural network controller is built to imitate the way of player’s thinking. After being trained, the neural network controller can give the proper voltage instructions to the direct current (DC) motor of the slot car according to different track conditions. Test results prove that the development of the autonomous driving system is successful.
Modal Analysis and Optimization of Electric Vehicle’s Fast-Swap Battery Box
Authors: Lu Zhi Yuan , Zong Yuan Yang , Zhao Ming Yu , Zhang Hao
Published: December 2012

This paper studies the structures of electric vehicle’s fast-swap battery box by modal analysis. With the software of HyperMesh and MSC.Nastran, the free mode and constrained mode of electric vehicle fast-swap battery box are analyzed. The result is given with modal parameter and vibration mode that depicts each mode. And then, this paper studies the acceleration of battery box with the frequency scanning analysis, and focuses on the distance between of mounting edge on inner box and the pins on outer box on the basis of frequency-scanning results under different frequencies. At Last, this paper analyses the vibration mode which leads to the offset, proposes the method of improving vibration mode of battery box. In the road test process of fast-swap battery box, the structure of battery box shows the best performance of vibration resistance.
Study of Sliding Mode Control in Self-Balancing Two-Wheeled Inverted Car
Authors: Gao De Yong , Han Peng Wu , Zhang Dai Sheng , Lu Yong Jie
Published: December 2012

Using the method of Newtonian mechanics, the paper analyzes balance control problems of the self-balanced two wheeled cars, describes the detailed modeling process and simplifies it necessarily according to the needs of the control rate. It designs the full state feedback controller (LQR) and sliding-mode controller respectively, carries out the simulation and gets the ideal simulation curve. The comparisons of the simulation results show that the sliding-mode controller can get better performance than the full state feedback control in the control of the self-balanced two wheeled car.
The Influence of Torsional Damper Performance Parameter on Transmission System Torsional Vibration
Authors: Shi Wen Ku , Wu Guang Ming , Nie Shi Da , Wang Shi Chao , Chen Zhi Yong
Published: December 2012

In order to research the influence that the torsional stiffness and damping characteristic of the torsional damper had on the transmission rotational vibration, a multi-degrees-of-freedom model of torsional vibration of a transmission system of an FR type vehicle was built. The frequency of the torsional vibration model of transmission system was calculated, and the forced vibration in the transmission was analyzed; the sensitivity of the torsional stiffness and damping characteristic of the torsional damper on vibration response was researched. This method provides theoretical basis for solving the transmission system rotational vibration of the vehicle, and it has positive meaning in the development of the rear drivetrain NVH.
Self-Organized Traffic Signal Coordinated Control Based on Interactive and Distributed Subarea
Authors: Wang Hao , Liu Yun Xiang
Published: December 2012

In traditional traffic signal coordination control, all intersections are shared a common cycle and have fixed offsets in one sub-area. The range of sub-area is normally fixed, plan switching is difficult, and the reaction to the traffic problem is slow. In this paper, a self-organized dynamic control strategy is proposed. it decomposes the network optimization into overlapped and interactive problems between Basic Coordination Units (BCU). It presents an interaction-forecast model among intersections, each intersection not only considers its own benefit, but also takes downstream intersections into account. Multi-scenarios simulation shows it works well in all saturation degrees, reduces total delay around 8% to 12.3%.
Traffic Networks Layout and optimization in Transportation Channel Based on Four-Factor Method
Authors: Su Guo Hui , Chen Wen Qiang
Published: December 2012

This paper took the four-factor as decision variables: expense of section optimizing, opportunity cost of land occupation, transportation fees and networks efficiency, build model to optimize unimpeded issue of traffic networks, so as to resolve the problem of traffic networks layout and optimization in transportation channel.
The Analysis of Characterization of Urban Traffic Congestion Based on Mixed Speed Distribution of Taxi GPS Data
Authors: Lu Shou Feng , Mai Yan Hui , Liu Xi Min
Published: December 2012

The taxi with GPS is an efficient measure for detecting traffic condition. It is often called as floating car or moving detector. The aim of the paper is to estimate the characterization of urban traffic congestion based on taxi GPS data. Owing to the various factors including signal control, heterogeneous driver behavior, various vehicle performance, speed distribution of urban traffic is the typical mixed distribution. Based on this understanding, the paper firstly used kernel density estimation technique to estimate the probability density of mixed speed distribution. This method was a non-parametric probability density estimation method. Under the precondition that Gaussian kernel obtained the good fit quality, the paper used mixed Gaussian model to analyze the characterization of the congestion. By mixed Gaussian model, the paper obtained the numerical index including the mean, variance, weight. The example shows that we can estimate the characterization of urban traffic congestion using the paper's method. The results are important for designing traffic management plan for different scenarios and evaluating the performance of traffic management facilities.
The Research of Aeroplane Engine Blade 3D Point Clouds Processing
Authors: Wang Hao , Wang Dong Yan , Dong Ting Jian , Wang Tao
Published: December 2012

This paper made the point cloud data processing for the aircraft engine’s blade. First, collected rough point cloud data by using visual measuring equipment. Then, noise reduced and smoothed, feature detected the point cloud data, took the reasonable simplification, finished pre-processing the point cloud data. Finally, took the surface fitting for the point cloud data after processed. The result proved that processing the point cloud data reduced modeling and machining time, and improved smoothness of the model.
Grain Moisture Content Measurement System Based on Time-Domain Transmission Technology
Authors: Tong Zhi Min , Rong Li Hong , Huang Cao Jun
Published: December 2012

To measure the grain moisture content with time-domain transmission technology (TDT), electromagnetic wave propagation characteristics was studied to find the relationship of electromagnetic wave propagation and the dielectric parameters of grain. Basic structure of measurement sensor was designed to be coaxial transmission line based on TDT theories. The main parameters of the sensor were calculated. The measurement circuit was designed based on processing theories of high frequency electromagnetic signals. Grain samples with different moisture contents were measured by both TDT system and the standard drying method. The results show that TDT system with Quadratic curve measurement model is of desired measurement accuracy.
The Application of FLAC Software in Stability Analysis of Highway Slope Reinforced by Prestressed Anchor Cable
Authors: Wang Hui Min , Cao Liang , Yao Ji , Li Ze
Published: December 2012

rigid limit equilibrium method and numerical simulation of FLAC software based on strength reduction method was used in this paper, and the stability of a highway slope before and after the reinforcement by prestressed anchor cable was analyzed. The calculation results showed that, the stability of designed excavated slope could not meet the requirements, while the stability of reinforced sloped by prestressed anchor cable could. The sliding surface of the slope and the corresponding stability factor could be obtained in two ways, but the numerical simulation of FLAC software considered the material deformation, so the calculation results was smaller than the results of rigid limit equilibrium method.
The Measurements of Spectral Reflectance Spatial Distribution on Mc-Si Solar Cell Surface
Authors: Zheng Xiao Dong , Ye Yan Zhong , Shen Lin Fang
Published: December 2012

Measurement results of spectral reflectance spatial distribution on multi-crystalline silicon solar cells surface are presented. The optical measurement apparatus employs a specific designed micro-spectral reflectance meter. It is suitable for working in visible wavelength range; measurable sample size can be as small as 0.06mm. Results of reflectance distribution on mc-Si solar cell are presented as a spatial sampling interval of 0.1 mm. The peak values of spectral reflectance appear about 400nm wavelength and vary from 10% to 30% with the spatial position on solar cell.
Non-Uniform Spectral Amplitude Encoding for Optical Wireless Communication Links through Atmospheric Turbulence
Authors: Chen Chun Yi , Yang Hua Min , Lou Yan , Jiang Zhen Gang
Published: December 2012

The performance of optical wireless communication (OWC) links based on the spectral amplitude encoding (SAE) of a broad-band spatially partially coherent beam through atmospheric turbulence is analyzed. It has been found that the power efficiency of transmitters of OWC links based on the non-uniform SAE is higher than that based on the uniform SAE. Further, the spectrum division method for the non-uniform SAE of broad-band beams has been proposed. The non-uniform SAE of a broad-band spatially partially coherent beam is an effective method to reduce the performance degradation of OWC links caused by atmospheric turbulence.
Research of Remote Monitoring Based on Embedded System and GPRS
Authors: Chu Chang An , Chen Yu Tuo
Published: December 2012

In order to meet the demand of remote monitoring, this paper introduces a method of realizing remote monitoring based on mobile network and embedded system. Related key technologies include building remote monitoring terminal, sending and receiving of SMS, making and sending of MMS. By using S3C6410 hardware platform and Linux OS, as well as GPRS module, and developing phone specific program and interface in control terminal. Users can control and monitor the equipments and working condition in remote terminal or dangerous areas, and query their video images and abnormity information by sending phone SMS or clicking on developed phone interface buttons easily and conveniently.
Design and Realization of SDRAM Controller Based on FPGA
Authors: Li Guo Hong , Wu Zhen
Published: December 2012

This article introduces a SDRAM controller based on FPGA. It describes the architecture of controller and takes explain for each module .There is also a timing analysis about data communication between FPGA and SDRAM before post-simulation. Through board verification , a burst mode with auto precharge and full-page mode without auto precharge are achieved and the highest bandwidth in each mode are listed.
A Distributed Network Risk Assessment Method Based on Attack Graph
Authors: Yang Tian Chi , Fang Ming , Shao Qi Feng
Published: December 2012

Evaluating risk effectively selecting effective defence measures and defending information threats actively are the key points of resolving security problems of information system．Based on the actual requirements and status of risk assessment of information security，we integrate attack graph to apply it in studying risk assessment of information security．Firstly，focused on the uncertainty and complexity of risk assessment of information security，we integrate the technology of vulnerabilities associated with to apply it in studying risk assessment．On the other hand，since the attack path described by attack graph model is suited for the quantity data processing，and poor to the qualitative analyze，and risk is uncertain，the risk factors are quantized by the probability of attack path forming proposed in this dissertation so that the probability of atom attack are pre-treated，a risk assessment method based on attack graph model is proposed．The method Take full advantage of computing power of each host in the network, greatly shorten the attack graph generation time.
Design of CAN Communication in the STM32-Based Lithium Battery Formation System
Authors: Li Yue , Liu Gen Wang , Zhu Zhao Xuan
Published: December 2012

Aiming at the solution of low communication rate, stability and anti-interference problem of lithium battery formation and test equipment, a plan of Controller Area Network (CAN) communication is introduced based on ARM-Cortex STM32F103 which integrates CAN controller to solve the problem of communication rate and stability between bottom and top. The system design and the realization of the hardware and software about CAN module is introduced in detail.
QoS-Supported for 802.11e EDCA Protocol Optimization in Wireless Mesh Network
Authors: Wang Xia Hua , Li Tao Shen , Ge Zhi Hui
Published: December 2012

In wireless mesh network，the IEEE 802.11e EDCA protocol with fixed queue-access mechanism, which makes the QoS of voice and video traffic are not guaranteed in the high load traffic, and the channel utilization is low when the network load is under-loaded .Therefore, a dynamic adjustment access queue algorithm is proposed, in which nodes could adjust their access queue according to the network load state they measured. So the proposed algorithm could improve the channel utilization while at the same time meeting the QoS demand of high-priority traffic. The simulation result shows that, the algorithm has better performance than that of the IEEE 802.11e on the guarantee of the QoS and the channel utilization under various scenarios.
Design and Implementation of Dual-Channel and Dual-Mode Timing Module Based on Beidou & GPS
Authors: Pan Xiao Shan , Zhou Zi Guan , Zhou Min , Qi Bing
Published: December 2012

Against the Status quo that satellite timing service in many fields of China mainly relies on the GPS system, for full use of the Beidou navigation satellite system with our own intellectual property, this paper presented a chip-level solution of dual-channel and dual-mode timing modules based on the Beidou-2 and GPS navigation system. The timing principle of Beidou navigation satellite system was first introduced, and then the hardware design of the timing module was presented with selection of highly-integrated RF chip and baseband processor chip. Furthermore, many kinds of output interfaces were designed to meet diverse service demand. By analyzing the format of the received signal, the flow chart for extracting timing information was also given. Finally, the designed timing module was tested by using the developed timing display system and test results show that the module has a better timing performance.
Design of Open Laboratory Management System Based on RFID
Authors: Dong Yun Hua , Yu Xi
Published: December 2012

A reliable management system based on RFID was introduced to ensure the more efficient and effective operation of laboratory.In this system, reader/writer is on the basis of MFRC522;P89LPC932 is used as access controller; control nodes communicate with center server based on RS485 and TCP/IP ; development platform is based on Visual Studio2010 and database is established on SQL Server2008. This system has high reliability and good real-time capability because of the distributed structure and centralized control.
Design of Greenhouse Environment Monitoring System Based on Qt Platform
Authors: Chen Xiang , Sun Ji
Published: December 2012

This paper probes into the design of greenhouse environment monitoring system based on S3C2410 ARM microprocessor. It focuses on the development of Graphical User Interface (GUI) applications based on Qt/Embedded and the Linux driver for temperature and humidity sensor in the environment monitoring system. The use of GSM module achieves the safe warning function. By porting Web server and using CGI technology, the system realizes the remote monitoring well. The test results show that the system can accurately capture and display temperature, humidity and light intensity of the greenhouse, provides a friendly human-computer interface, is easy to use and has good application prospects.
Design of Automatic Measurement System of Lithium Battery Electrochemical Impedance Spectroscopy Based on Microcomputer
Authors: Li Wang , Liu Gen Wang , Yang Fu He
Published: December 2012

A system of miniaturized lithium battery electrochemical impedance spectroscopy (EIS) measurement is designed with high precision impedance converter chip AD5933 as its core. The measurement range of the system is from 0.010Hz to 100 KHz. Meanwhile, by using a high-level programming language of C#, an interface is developed which can real-time graphic display of EIS information. Through measurement and analysis of two types of impedance, the results show that detection precision of the system is less than 3.5%. Finally, amplitude-frequency response curves and Nyquist plots of HL-18650 M lithium battery at different state of charge (SOC) levels are measured. Compared with lithium battery EIS measurement system by traditional division, this system has the outstanding advantages of small size, high level of integration, low cost, simple operation and high precision. It is helpful to the mass production and application of lithium battery EIS measurement system.
Research and Implementation of Asynchronous Video Converter based on Linux
Authors: Ni Han Biao , Cao San Xing
Published: December 2012

As a visual form of expression, video has been favoured by more and more viewers. But in actual applications, various operations have different requirements for videos, which necessitate the video converter. This paper proposes a queuing mechanism by using the FFmpeg platform to achieve asynchronous video conversion based on the Linux OS environment. The test results show that this system realizes the asynchronous conversion of video contents by calling inotify and FFmpeg.
Integrated Query of Multi-Resources Information in the Way of SaaS Application
Authors: Zhou Bo , Liu Wen Liang
Published: December 2012

The thesis researches and analyzes the ways of information query from the model of SaaS (Software-as-a-service) in cloud computing frame to establish a common data model by using XML. It puts forward a frame of integrated query of multi-resources information by the way of SaaS application by connecting the query of heterogeneous data in the way of the middleware and combining the method of interface software with the method of gathering database metadata during cross search. The model will facilitate querying effectively and utilizing fully rich information resources in the field of information query for users; effectively reduce the costs of users without maintaining and managing; promote the integration of social resources and produce the beneficial result of the scale economy.
A Preliminary Study on Software Architecture Evolution in Agile Development Process
Authors: Wang Xiao Hua , Zeng Xu
Published: December 2012

Software architecture always exists in the target system although agile methodology (AM) weakens the design documents of the software architecture, and it will be improved continually as iteration process. The changes of business process and customer requirements should be dealt with in time. Therefore, it is essential that the stages of architecture evolution are explored in each release plan. The main hierarchy of architecture evolution is shown, the relationship between user stories and components is presented, and a method to support architecture evolution is given.
Design of Human Machine Interface Based on ARM and Linux
Authors: Zhang Kun , Peng Xi Wei
Published: December 2012

In order to provide more convenient options for users and developers, the design of Human Machine Interface (HMI) based on ARM and embedded Linux is put forward. It makes full use of multiple peripherals of ARM and flexibility of Linux OS. Firstly, hardware design of the HMI system is presented. Then methods of embedded Linux transplanting and the device drivers programming are discussed. Finally, running results and applications of the designed HMI are considered. The design combines the features of traditional HMI and Micro Control Unit (MCU) HMI, including low cost, rich interfaces and easy programming.
Lossless Digital Watermarking Technology for Vector Maps
Authors: Sun Jian Guo , Zhang Guo Yin , Men Chao Guang , Wu Yan Xia , Wang Xiang Hui
Published: December 2012

In ensuring the content of digital vector maps lossless, a high capacity digital watermarking algorithm is proposed based on encoding scheme. According to the structure of TAB file for digital vector maps, the watermark is hidden into the attribute blocks. As each vector object definition reserves redundant space, these information bits cannot be edited and displayed by any map editing tool, the watermark has good concealment. Experimental results show that the algorithm maintaining high capacity and good invisibility, it also can strongly resist various geometric transformations such as cropping, rotation, projection, etc..
A SCADA System Regression Testing Method Based on Component Modification Assesment
Authors: Xie Kai , Zhang Gao Feng
Published: December 2012

In the maintenance of SCADA system, requirements may have been changed, which motivates the component modification to create new versions and their accompany tests. Regression testing strategies aim at the retest for modification affection in SCADA software maintenance. This paper presents a SCADA system regression testing method based on a new Component Testing Association Model. In this method, previously executed test cases are selected to generate the minimal regression test suite by the identification and impact analysis for the modification-affected component groups.
Software Platform for General Purpose Test and Diagnosis
Authors: Xu Bo , Guo Li Wei , Yu Jin Song
Published: December 2012

This paper centers on the software reuses of Automatic Test Systems (ATS) and the integration of test and diagnosis to reduce maintenance costs. Based on the research into the basic framework, data services, packages and definition of interfaces, we present an integrated software platform for test and diagnosis system. The platform achieves the separation between the user interface and test logic, the combination of fault modeling and diagnostic reasoning, and the integration of test and diagnosis.
On a Generalization of Hilbert’s Inequality and its Reinforcement
Authors: Xi Gao Wen
Published: December 2012

The purposeof this paper is to establish on a generalization of Hilbert’s inequality and its reinforcement.
Design and Implementation of E-Learning System for Code-Switching Bilingual Teaching
Authors: Shi Guo You , Liu Shuang , Chen Peng
Published: December 2012

To support code-switching bilingual teaching in computer major courses, an online e-Leaning system based on model-view-controller (MVC for short) architecture is designed and implemented using object-oriented analysis and design method. Here, Struts, Spring and Hibernate are chosen as development frameworks to implement MVC model. Google Translate API as a tool that automatically translates text from one language to another language is adopted to support web pages with multiple languages. Based on various teaching materials such as video or audio or flash, it is easy for students to finish self-study and for teachers to finish supplementary teaching. With this e-Learning system, it is convenient to arouse students’ interests of computer major courses, improving students’ English expression skills of speaking and writing and enhancing students’ international employment competence.
Sensitive Webpage Filter Based on Multiple Filtering
Authors: Wang Dong Mei , Ma Ming , Sun Yan
Published: December 2012

In order to improve the accuracy and real-time performance of webpage filtering, a sensitive webpage filter based on multiple filtering was designed. Firstly, the URL is gained from IE browser’s address bar by BHO technology; Secondly, match the webpage text with sensitive vocabulary database using SMA algorithm; Finally, use the sensitive image detecting algorithm combing face detection, skin detection, skin text detection and classification to filter sensitive images in the webpage. The Simulation experimental results showed that the sensitive webpage filter can effectively intercept and filter sensitive webpages, meeting the accuracy and the real-time requirement of webpage filtering.
Design and Implementation of Configurable FFT/IFFT Soft-Core Based on FPGA
Authors: Zeng Gui Gen , Ren Jiang Zhe
Published: December 2012

As a Basic Transforming Operation between Time Field and Frequency Field, FFT Has Been Widely Used in Detection, Telecommunication, Signal Processing, Multimedia Communication Etc. the Implementation of the FFT Algorithms on FPGA Is Always the Hot Research Spots. in Order to Overcome the Shortcomings on the FPGA Resource Reusability Used in FFT Algorithm, this Article Discusses a New Configurable and High Efficient FFT/IFFT Soft-core Solution. the FFT/IFFT Soft-core Adopts Radix-22 Algorithm and Single-Path Delay Feedback (SDF) Pipeline Structure. its Configurable Factors Include: FFT/IFFT, FFT Points (2n, [3,12] ), Fixed-point Bit Width, Clock Delay of Complex Multiplier. the Design Takes FPGA Chip Stratix II EP2S130F780C4 as Hardware Platform, and the Complete Simulation and Synthesis Is Taken. the Maximum Operating Frequency Is up to 306.30MHz. if 300MHz Clock Frequency Used, 4096-point FFT Could Be Realized in 26.73us, and the Consumption of Memory Resources Is only 148Kbit. Compared with Altera FFT IP-core, Our FFT/IFFT Soft-core Has a Little Bit Longer Computing Time (0.6%). however, the LE Resource Consumption Is only 79% of Altera FFT IP-core. Platform, and the Complete Simulation and Synthesis Is Taken. the Maximum Operating Frequency Is up to 306.30MHz. if 300MHz Clock Frequency Used, 4096-point FFT Could Be Realized in 26.73us, and the Consumption of Memory Resources Is only 148Kbit. Compared with Altera FFT IP-core, Our FFT/IFFT Soft-core Has a Little Bit Longer Computing Time (0.6%). however, the LE Resource Consumption Is only 79% of Altera FFT IP-core.
Exception Handling in Service-Based Business Processes by Applying Adaptation Planning Graph
Authors: Shang Zong Min
Published: December 2012

This paper proposes an exception handling mechanism based on Adaptation Planning Graph for service-based business processes. A three-layer representation model of service-based business process is introduced firstly. And then, Logic Model of Service-based Business Process and Adaptation Planning Graph are introduced to enforce reliability of composite Web Services at run-time. Simulations prove that this approach can efficiently guarantee the reliability of composite services at run-time.
On-Line Signature Verification Utilizing 3-Axis Force Features Extraction Based on DWT
Authors: Liu Dong , Ge Yun Jian , Zhang Xue Yong
Published: December 2012

Automatic on-line signature verification is an intriguing intellectual challenge with wide attention and practical applications. We examined the validation of the new dynamic features for on-line signature verification, which extracted from 3-axis forces of pen-tip to writing tablet with application of discrete wavelet transform (DWT). The force signals were decomposed into sub-band signals by DWT and individual features were extracted as locations of modulus maximum in detail and the values of the wavelet transform at the corresponding location. Verification was achieved by using dynamic time warping (DTW) and total decision was done by combining multiple thresholds. Experimental results indicate the effectiveness of the dynamic features for on-line signature verification described in this paper.
A Control Algorithm of LCD Dynamic Backlight Based on PSNR
Authors: Zhang Xiao Bing , Liu Xin , Liu Bo , Han Jiang Hong , Wu Hua Xia
Published: December 2012

A new algorithm is proposed to adjust backlight luminance for local dimming of liquid crystal display (LCD) devices. PSNR (the peak signal-to-noise ratio) =30 is acted as the lowest standard to guarantee the quality of image in the algorithm. Based on the formula of PSNR=30, the square error value of the image distortion is gained. Then, luminance of backlight is gained dynamically by that the maximum gray level minus 1 into the formula proposed in the paper and decreases by one after each trial if the image quality requirement is not satisfied. In order to simplify the calculation, three important gray level values are selected to meet the requirements. The results show that the algorithm can greatly reduce the power consumption with guaranteeing the image quality and furthermore save much time in calculation and be better applied in hardware.
The Fault Diagnosis System Design Based on PMA
Authors: Li Ting Jun , Gao Lei , Liu Zhi Yong , Xu Yu Ru , Xu Jin
Published: December 2012

Designed a sort of IETM fault diagnosis system based on PMA, which includes maintenance guiding pattern, fault auto-diagnosis pattern and tele-maintenance cooperative support system based on expert system. Enrich and strengthen fault diagnosis function of PMA and has a certain significance to broaden.
CIM/XML Format-Based SCADA Data Analysis and Application
Authors: Wang Shu Peng , Xu Yi Fei , Ma Su Xia , Qi Lin Hai
Published: December 2012

With the putting forward and continuous expansion of the IEC 61970, the data interaction among heterogeneous system becomes possible, and continues to be put into practical application. In this paper, Firstly, CIM (common information model) was introduced, and the CIM/XML format was used to describe SCADA data. Secondly, SCADA data were analyzed and stored in database through the program. Finally, the specific application of analyzing SCADA data is described through the application in area of voltage Sag.
Rendering Algorithm of the Sky Illumination Based on GPU
Authors: Yu Wen Long , Zhang Li Min
Published: December 2012

This paper proposed the algorithm of the sky color rendering based on the relationship between the height of viewpoint and the altitude of scattering point with atmospheric density after the study of atmospheric absorption and scattering and sky illumination simulation methods. The geometrical model of the sky dome and rotation and the sun location is presented. The rendering method based on GPU is designed. The results of experiment show that the rendering effect of the sky illumination based on this algorithm is realism.
Design and Implementation of Archives Query System Based on B/S Structure
Authors: Zhao Lian Feng
Published: December 2012

This thesis takes archives management system of Huzhou Teachers College which the author has participated in its development when working in the archive as an example, and briefly introduces the system architecture and function module of archives management system in high education based on B/S model and ASP technology, which greatly raises network level of file query and management efficiency in colleges and university.
Research of Extracting Chinese Automatic Abstracting Processing Based on Semidiscrete Matrix Decomposition
Authors: Luo Yang
Published: December 2012

This paper introduced six popular methods of automatic abstract.Finally，on the basis of LSI this paper proposed an approach of extracting sentences based on SDD sentences clustering
An Improved Semidiscrete Matrix Decomposition and its Application in Chinese Information Retrieval
Authors: Luo Yang
Published: December 2012

Information retrieval is an important direction in the area of natural language processing .This paper introduced semidiscrete matrix decomposition in latent semantic indexing. We aimed at it’s disadvantage in storage space and presented SSDD,then we compare the difference of SVD and SDD and SSDD in performance
Research on Key Technology of Knowledge-Based Intelligent Fault Diagnosis of Hydraulic System
Authors: Liu Xue Xia , Tan Ye Fa
Published: December 2012

A general framework of hydraulic fault diagnosis system was studied. It consisted of equipment knowledge bases, databases, fusion reasoning, knowledge acquisition and so on. The tree-structure model of the fault knowledge was established based on fault hierarchy and logicality. Fault nodes knowledge was encapsulated by object-oriented technique. Complete knowledge bases were made including fault bases and diagnosis bases. It could describe the fault positions, system structure, cause-symptom relationships, diagnosis principles and other knowledge. The results show that the methods are effective.
Online Visual Inspectionsystem for OLED Defects
Authors: Liang Yao Cong , Gao Jian , Jian Chuan Xia , Chen Xin
Published: December 2012

The OLED defects generated in the manufacturing process restrict the development of OLED industry, machine vision based automatic OLED-inspection equipment can rapidly detect these defects and help to improve the OLED manufacturing process. The OLED images have the features of repeating texture background, uneven overall brightness of the image and the defects without obvious edge. In addition, an uncertain change in light and position of the inspection system increases the difficulty of the detection. Therefore, we propose the method to detect defects which take advance of the human eye characteristics of the Gabor filter and the unsupervised and fast segmentation features of the Fuzzy C-Means FCM algorithm. Through the combined 2-step segmentation, most OLED defects can be detected. The experimental tests are performed to validate the effectiveness of the proposed method. The result of the experiment shows that this method works well which can meet the requirements of robustness, automation of the fast and reliable of an online inspection system.
Testing System of Optical Head Spot Besed on Labview
Authors: Liu Xiang Ming , Shi Jie
Published: December 2012

According to the characteristics of the NVD optical head spot, designing the Virtual instrument testing system based on NI Image processor, denoising the optical head spot, extraction the spot target, calculation of the spot parameter. The spot definition will be better and have good performance after the software processing. The detection method has such advantages as easy to integrate the function of computer hardware and software, highly cost-effective, good reliability, certain versatility and expanding. It has the certain reference value on the similar characteristics study of optical-mechanical-electric system and project evaluation.