bluuebunny/crossref_metadata_2025 huggingface dataset:
Key Techniques and Implementation of Heterogeneous Financial Data Integration
Authors: Li Shuo
Published: December 2014

With the deepening of higher education reform and expansion of asset reorganization of colleges, the scale of higher education increases rapidly and large-scale colleges colleges are emerging. The development of scale of colleges requires heterogeneous systems to realize data integration and application integration, which not only implements efficient and ordered information management of finance,and real-time supervision, management and control on operation of subordinate departments, but also effectively supports decision-making ability of educational administration department and enhances competitive power of higher education.
The Design of the M-Learning System Simulation Model Based on Streaming Media Technology
Authors: Liu Xue Feng
Published: December 2014

In this years, the human society has entered information period . many aspects of human life has changed , the traditional teaching system and teaching model are facing the challenge of the transform , so the M-learning has become a new learning style . Nowadays, the Mobile Learning has based on the mobile Intern technology and mobile communication technology . So this stylize is very popular .
Research on the Application of Organizational Management Information System
Authors: Zhang Zhi Mei
Published: December 2014

To well organize China's Large-scale Sport Events, causes the Large-scale Sport Events organization to manage in the process each kind of activity and the work carries on the effective classification the equipment personnel and the division of labor authorization, we synthesized research techniques and so on utilization systems science, management science, mathematics modeling, artificial intelligence, information technology design in China's Large-scale Sport Events to organize the management information system, This article comprehensively elaborated this system function demand, the bare bone, the system design and the core function and so on.
Design of Cloud Computing Environment for Online Open Course
Authors: Zhao Xiao Yong , Yang Chun Rong
Published: December 2014

The rise of Massive Open Online Course (MOOC) has enabled open courses to overcome the shortcomings of its traditional mode. Interactions and communications have become important elements in online open courses right now. Cloud computing is a new platform for MOOC development, which is extension of the distribution computing, the parallel computing and the grid computing, settling the problem of various resource sharing. In this paper, the design of cloud computing environments is showed with the cloud computing system structure, network security analysis of cloud computing, and map-reduce program mode, which forms the model of cloud computing environment.
Research on Performance Optimization Scheme of Oracle Database
Authors: Yao Shu Chun
Published: December 2014

The paper starts from performance optimization of Oracle database. Based on analysis of Oracle structure, the paper explores performance optimization of Oracle database for database parameters, application system and network load. And the paper expounds reasonable planning of database and how to analyze and improve the performance after operation, and how to optimize a database with satisfying performance.
Design and Implementation of College Students’ Grade Management System Based on B/S Mode
Authors: Zhan Mu Qing , Lu Rong Hua
Published: December 2014

The students’ grade management system is a significant part of informatization, and one good grade management system is crucial for the managers and decision makers in colleges and universities. This thesis firstly expounds the trend and necessity for colleges to establish a student grade management system; secondly, it introduces the system design and database design of the system; lastly, it elaborates the realization of key modules in detail. The operating system is proved by a test to be stable.
Analysis of Data Security Technology under Cloud
Authors: Kun Xiao
Published: December 2014

For the data security threats caused by out sourcing model and shared vulnerability, and base on user data in static characteristics of cloud storage services and the dynamic nature of cloud computing, it requires to propose corresponding data security protection mechanisms, in addition, in order to make the mechanism work normally, we propose a program which can be trusted and can be garnered and user can test, offer the recoverability of data and the integrity verification of data and the accountability leak of data.
Design and Implementation of Mobile Technology in English Listening
Authors: Chen Xin Xin
Published: December 2014

The research of College English mobile learning platform based on mobile phone help to develop and improve mobile learning theory and provide a solid theoretical foundation for future generations; on the other hand, it also help to achieve the learning style with student-centered, Individualization and self-control the learning process to stimulate College students 'interest in College English learning and improve College students' English ability.
Information Security Assessment Data and Control Algorithm
Authors: Huang Jun
Published: December 2014

To avoid the cost due to security problems, the repair and defense the threat of information, this paper build information system CAACM the tree structure model, through the study of the characteristics of attribute date classification, and then reconstruct the formula defined data characteristics depend on the degree of classification properties can be achieved, propose a classification attribute data for feature selection algorithm. Simulation result demonstrates the effectiveness of the algorithm.
Analysis of the Security Mechanism of Android and Countermeasures
Authors: Zhou Bing
Published: December 2014

Now, as the security threats for the Android phone increasing, the security problem about the smart mobile-phone has become a focus of the topic. In this paper, we take the security problems on Android operating system as the study object .Our contribution in this paper is two-fold. First, SQLite database is the mainly way for data storage on Android, but no security mechanism was provided in SQLite, we implement data encryption technique refer to the common database security mechanism. Second, in order to solve the security threats existing in the traditional phone, we also give a design and implementation of multi-function mobile phone firewall.
Design of Information System of Electrical Power School Based on Cloud Computing
Authors: Hao Cheng Long , Wang Yong Zhi , Tong Shi Meng , Ren Shou Ze , Sun Feng
Published: December 2014

In order to adapt to the demand of integration and sharing about electrical power school and to break the limitation of "Islands of information", it is necessary to develop a loosely coupled information system. This paper introduces the system application demand of electrical power school, and designs the functions of the system and scientific object-oriented data model. A concept of operating mode information system is designed based on cloud computing. Object-oriented programming language C# is used to develop the prototype of the system. The result of application is showed in various UI. This paper provides a valuable reference for the information technology future about electrical power school
Distributed Intelligent Field Information Processing for Agile Manufacturing
Authors: Zhu Wen Bin , Zhu Xiao Chun , Wang Mu Lan , Ding Wen Zheng
Published: December 2014

The ability of acquiring and processing information in manufacturing influences agile of manufacturing system. According to the idea that networked field information processing is realized based on intelligent nodes of field-bus technology, distributed intelligent field information processing flow is researched to synthesize multiple functions such as information gathering, information processing, warning system and field control. The method of information represented and collected was put forward. The multilayer data fusion model of distributed intelligent field information processing is built. Then the distributed LonWorks fieldbus monitoring model (DLFMM) based on LonWorks fieldbus technology is established. A monitoring system of a rail vehicle automatic door factory is shown as an example to illustrate design strategy of monitoring system based on DLFMM. This monitoring system shows that the model of distributed intelligent field information processing, DLFMM and the extraction and representation of information flow discussed in this paper are reasonable and applicable.
Research on Storage Technology of Electronic Textbook
Authors: Dong Biao
Published: December 2014

This paper presents an approach for modeling and implementing e-textbook (electronic textbook) resource organization and storage using a content structure model. The model is divided into three layers, namely atomic component layer, composite component layer and component pool layer, and provides the means for the reclassification and package of e-textbook resource. A formal definition is proposed for the model, and a storage algorithm is analyzed. The results show that the approach has the following characteristics, such as low resource maintenance cost, simple and efficient access, large and uniform directory capacity, and easily expanded storage space.
Research on Computer Network Fault Diagnosis Mechanism Based on VXI
Authors: Guo Tao , Liu Zheng Qi
Published: December 2014

For the problems of wear real-time, compatibility and intelligence, we have designed computer network test and failure diagnosis system based on VXI bus technology. The hardware and software of the system have been improved. To implement real time, high speed data communication and transmission, the functions of VXI test board have been extended. The degree of intelligence and automatization has been improved through introducing expert system in the design of software. These will provide new references for improvement of existing test and diagnosis systems of computer network equipments.
Research on Transition Zones of Spherical Surface Parts in 3D Rolling Process
Authors: Wang Da Ming , Li Ming Zhe , Cai Zhong Yi
Published: December 2014

3D rolling is a novel technology for three-dimensional surface parts. In this process, by controlling the gap between the upper and lower forming rolls, the sheet metal is non-uniformly thinned in thickness direction, and the longitudinal elongation of the sheet metal is different along the transverse direction, which makes the sheet metal generate three-dimensional deformation. In this paper, the transition zones of spherical surface parts in 3D rolling process are investigated. Spherical surface parts with the same widths but different lengths are simulated in condition of the same roll gap, and their experimental results are presented. The forming precision of forming parts and the causes of transition zones in the head and tail regions are analyzed through simulated results. The simulated and experimental results show that the lengths of transition zones of spherical surfaces in the head and tail regions are fixed values in condition of the same sheet width and roll gap.
Research on Microblog Based on Analysis of Mapping Knowledge
Authors: Xi Yun Jiang , Li Wei Chan , Liao Xiao
Published: December 2014

This paper studieddomestic micro-blog areas, which adopted the cluster analysis; strategic coordinate analysis and co-word network analysis based on the knowledge mapping theory and methods with software tools SPSS19.0, Matlab, Ucinet6.0 and NetDraw. The study found that research of micro-blogareas can be divided into five knowledge groups: (1) propagation characteristics and application research of micro-blog; (2) marketing and social network analysis based on the micro-blog; (3) new media characteristics and application research of micro-blog; (4) microblogging public opinion analysis and its application research in colleges and universities and government affairs; (5) based on theEmergency communications and microblogging public opinion monitoring guide method research.
Research on Sports Simulation Technology Based on Virtual Reality Technology
Authors: Le Zhi Qiang
Published: December 2014

In recent years,the development of computer graphics technology and sensing equipment develop rapidly, and the virtual reality simulation technology should be more and more mature real environment. Application of virtual reality technology in the field of sport also becomes more and more widely. Based on the virtual reality technology application in sport and research field, we will discuss the implementation scheme of virtual scene based on virtual reality technology, for sports training and technical analysis to explore new ways and means.
A Teaching Resources Platform Based on Cloud Computing Technology
Authors: Huang Bin Wen , Li Jie Yu
Published: December 2014

This paper gives a teaching resources platform that is a comprehensive feature rich, convenient use, strong interactivity based on cloud computing technology. Platform includes various cloud functions and cloud spaces such as identity authentication function, single sign-on function, resources upload/download function, resources collection function, resource integration function, instant communication function, teacher resource cloud space, student resources cloud space, theme resources cloud space, department resources cloud space and schools resources cloud space. Compared with available technology, we can build an no capacity constraints cloud platform for storage and sharing of teaching resources based on the cloud computing technology, this teaching resources cloud platform is an open, interactive public service platform of educational resources.
A Web Service Enabled Framework for RFID Applications
Authors: Li Sheng Pu , Wang Xiao Hui
Published: December 2014

RFID can give a unique digital identifier to real physical object, and bridges the physical world with the virtual digital world. Based on the analysis on our experience of RFID applications, some common key issues and requirements of RFID application are presented. A lightweight framework based on Web Service to support ubiquitous RFID application of medicine logistics is designed and implemented. This lightweight framework provides the integration of RFID technology and other holistic applications. Virtual object is used to map the real physical world object and the virtual digital object. Experiment result is given and some future research directions are discussed.
Wireless Digital Display Thermometers System Design
Authors: Liu Liang Fei , Zhao Hong Wei , Zang Xue Bai
Published: December 2014

This article describes a real-time temperature measurement system based on ARM9 and temperature sensor DS18B20. The temperature signal is collected by DS18B20 and converted into 16 bits serial digital signal. Later, ARM9 receives the signal and sends it to the wireless transceiver module PTR2000. PTR2000 sends the received signal to ARM9. At last the signal is transmitted to the LCD for a real-time display, also be sent to the printer for detailed records. Our design proposal is simple and practical.
Improvement on Zero Nonlinear Compensation of Time Division Multiplier
Authors: Zhu Wu , Yu Juan Juan
Published: December 2014

In order to overcome the power measurement error caused by switch leakage of time division multiplier, in this paper, the mechanism of switch leakage of no-beats time division multiplier was analyzed, and switch leak was tested. On the basis of this, power compensation circuit on zero point correction based on voltage feedback and voltage frequency conversion method is designed, subsequently the compensation effect was tested respectively. Test results show that the zero compensation method based on voltage frequency conversion method is better, the zero error decreased to 0.0022%, the accuracy of the power measurement was improved.
Assessment of Transmission Line Icing State Based on Multi-Sensor Information Fusion
Authors: Yao Jin Ming , Yang Jun Jie , Lou Zhi Bin
Published: December 2014

Due to considerations limited for the current monitoring techniques and computational models and other reasons,the accuracy rate of line icing condition assessment is not high. Transmission line icing are affected by many factors, having greater relevance with micro-meteorological parameters. To improve the assessment accuracy of transmission line icing condition,multi-sensor information fusion method are put forward for a comprehensive assessment to Line icing state, based on online monitoring system,considering the equivalent ice thickness of monitoring system, micro-meteorological parameters and duration of ice cover.BP neural network convergence line icing membership value, the output state is cing probability. Then ,the probability of the state of uncertainty output line integrated assessmen through Fuzzy Reasoning
Voltage Imbalance Simulation for Distributed Network with Single-Phase PV Connected
Authors: Li Li Sheng , Zhang Shi Dong , Liu He Jin , Ji Xing Quan , Liu Gui Bin , Li Ke Jun
Published: December 2014

There exist many single-phase photovoltaic generations in modern power distribution network, and these distributed sources may be in a certain extent affect the symmetry of voltage. To investigate the impact of photovoltaic generation on quality problem of distribution network, mathematical and digital model of photovoltaic power generation are built in this paper, and the maximum power point tracking control is simulated based on incremental conductance method.
Optimize OpenFOAM from the Compiler Perspective
Authors: Ren Xiao Guang
Published: December 2014

OpenFOAM is a widely used open source computational fluid dynamics (CFD) , and the performance of its application is critical for the CFD user, and many researchers try to optimize it from various perspectives. In this paper, we try to optimization OpenFOAM application from the compiler perspective, which is the simplest way to get the optimization affect. We compare two mainstream compilers: Intel compiler icc and an open source compiler, as well as a serious of optimization option flags. Through the experiment, we find that Intel compiler has a much better performance than gcc, which is up to 9.88%, and a suitable combination of the optimization option flags is important to the compile performance.
Power System Control Considering Line Flow Risk
Authors: Chen Wei Hua , Chen Yan Wei
Published: December 2014

Line flow is one of the key factors which dominate the power system security. To deal with this problem, this paper proposed a method of power system assessment and control based on power system Line flow risk. Probabilistic power flow (PPF) is used to analyze the random of system statuses. The severity function is used to describe the impact of the transmission line load. Line flow risk is defined as the result of the probability multiplying the severity of Line flow. It is an indicator of power system security. This reduces the system line flow risk and increases the system security.
For a Study of the Application of Arc Interpolation in a Robot Manipulator System Based on FPGA
Authors: Yao Xiao Tong , Li Ya Wen , Zheng Qing Song
Published: December 2014

To make sure the feasibility of the three-point arc interpolation in any space after the MATLAB simulation, we applied it in FPGA (Field Programmable Gate Array, FPGA), finished the PCB board design, and used the arc interpolation controller to control the robot mechanical in this article. By analyzing the actual path, we found the results match the design requirements. The space controller guarantees the real-time and accuracy requirements of arc interpolation, and will have excellent practical value.
Research on Application of Solar Photovoltaic Grid Power System Research
Authors: Wen Yan Hao , Li Da Hua , Li Jun Fang , Jiang Yu Chen
Published: December 2014

Research on the conditions of solar photovoltaic grid connected power generation, research the form of converting solar energy into electrical energy generating.This paper introduces the solar photovoltaic system components, advantages and disadvantages as well as the current domestic solar photovoltaic power generation application status, prospect the development of the trend in the future, according to the analysis of the present problems. And relying on Tianjin CNOOC oil development group of Yingkou natural gas terminal 330KW solar photovoltaic power generation demonstration projects are introduced. For the photovoltaic CNOOC Yingkou terminal-station problems presents the feasibility scheme and suggestion.
Maximum Power Point Tracking Based on SVR and GA
Authors: Tian Zhi Guang , Tian Lin , He Jian , Huang Zhen Hua , Zhang Da Hai , Sun De Da
Published: December 2014

With the increasing application of Photovoltaic (PV) power system, it is important to make PV system always achieve its maximum power output, so maximum power point tracking (MPPT) technique develops. Based on Support Vector Regression (SVR) and Genetic Algorithm (GA), a novel MPPT method is proposed in this paper. The SVR model uses the solar radiation and temperature as two inputs, and uses the voltage at maximum power point (MPP) as output. Furthermore, GA is introduced to search the best parameters for SVR. Results validate the effectiveness of the proposed MPPT method.
Utilizing Indicator Computing Assistant to Facilitate Distribution Automation in LTE Wireless Private Network
Authors: Sun Ying , Lin Xuan Ni , Chen Li Ming
Published: December 2014

Concerning the communication infrastructure pertinent construction guidelines, China South Power Grid (CSG) has clearly defined and detailed the data network equipment quality control, test and check. This paper proposes two indicators to monitor the power distribution automation in LTE private wireless network. The first one is the distribution online ratio (DoR), which evaluates the effect of distribution automation infrastructure construction. The second one is distribution tunnel integrity ratio (DiR), which reflects the availability of distribution automation communication tunnel. Furthermore, an indicator computing assistant (ICA) is developed to collect the data of two indicators transmitted by the large number of custom premise equipment (CPE) in LTE private wireless network in a computationally efficient way, which frees the conventionally demanding human and computing resources..
Optimal Layout of the Multicoil for the B0 Shimming in Magnetic Resonance Imaging
Authors: Zhang Qiao Fu , Yang Xing , Li Ye
Published: December 2014

The performance of the multicoil shimming is much better than that of the spherical harmonic coils in many aspects. The diameters and locations of the multicoil are optimized for the B0 shimming of the third order spherical harmonic field. And then every independent coil is decomposed into two series coils to take full advantage of a limited number of shim current supplies. The performance is improved by 16.7% when quantified by the surface root mean square.
Study of Non-Normal Distribution Time Parameters Data Transmission Reliability in CAN Bus
Authors: Liu Yu
Published: December 2014

The message transmission reliability is very important for the design of the CAN (Controller Area Network) bus system, which is related to the normal operation of the bus control system. The bus message transmission time parameters are analyzed based on the CAN bus scheduling theory. The formula is a derived by means of probability analysis based on the fourth-moment method. An example is calculated to get its message reliability and the result is contrasted with the MONTE-CARLO method simulation, and then the bus message transmission reliability can be got. It has great practical significance.
A Capacitor Memory Erasing Technique for Pipeline ADCs
Authors: Guo Ai , Hu Rong Bin
Published: December 2014

A capacitor memory erasing technique for pipeline ADC is introduced, which insert a clearing phase to the traditional working timing sequence of the MDAC to erasing the residual charges on the sampling capacitor. The measurement shows that the 14-bit pipeline ADC adopting the proposed technique can achieve a sampling rate of 250MSPS with SNR 69dB, SFDR 80dB, compared with the traditional ADC of sampling rate 100MSPS, SNR 60dB, SFDR 71dB, which proves the proposed technique can improve the performances of pipeline ADCS obviously.
Power Grid Vulnerability Research Based on the Comprehensive Parameter
Authors: Pan Xiu Min , Song Xiao Xu , Yuan Yu , Gao Fen , Luo Yang Bai , Zheng Hua
Published: December 2014

One of the main reasons caused the blackout accident is the existence of the power grid vulnerable unit. Therefore, how to find out the existing vulnerable unit accurately becomes a hot topic in the power grid at present. In this article, the problem aiming at the insufficient of grid vulnerability metrics is studied. Firstly, the new comprehensive vulnerability indicator was constructed to remedy the disadvantages of the current indicators of grid vulnerability. Secondly, the calculation process was listed. Finally, the advantages and disadvantages of the new indicator and the traditional indicator were analyzed in detail in the IEEE typical example. The result of the example shows that the new indicator built in this article is valid.
Prediction of the Total Sound Level of the Annular Combustor Noise of Aircraft Engine Based on SVR
Authors: Zhu Lian Jun , Dong Yu Cai , Yuan Jian Guang , Yi Liang Hai , Fan Ge Hua
Published: December 2014

Because of the high temperature and high pressure environment inside the annular combustor of an aircraft engine, the direct measurement of the burner noise is very difficult. This paper set up the model of the total sound level and the effect factor SVR though analyzing the relationship between the total sound level and noise parameters of the combustion chamber the annular combustor an aircraft engine and the influence factors,, and it is better than multiple regression mode and the projection pursuit regression model, and predict the predicting samples so it is important for aero-engine design and reliability analysis.
Modeling and Analysis of the Operational Amplifier with SC Circuit
Authors: Wang Xing Hua , Jiang Pei Rong
Published: December 2014

This paper set up two structures model of switched-capacitor circuit based on second-order output settling, one type is charge transfer, the other is capacitance overturn. According to charge conservation when in charge storage and charge transfer process, the transfer function derived. By analyzing the time-domain solution in the form of output function, we find out the factors which influence on the rate of SC. In order to achieve the fastest settling time, the phase margin of open-loop amplifier is 63.4° in charge transfer by calculated, while in capacitance overturn is 76°.
Development of Braking Force Size Warning System against Rear End Collision
Authors: Cheng Wen Ming , Xiang Zhong Ke , Xiang Fei Fei
Published: December 2014

There are a large proportion of rear end collisions in a road accident. Based on high level brake lights, the authors developed a set of warning system to reflect the size of the braking force of the front moving vehicle. The rear moving vehicle would be correctly understand brake intention of the front moving vehicle according to vivid, intuitive and timely high level light signal. Thus, the following vehicle would take appropriate measures promptly according to further reduce the probability of rear-end collision accidents.
Application of General Regression Neural Network in Effectiveness Detection of Temperature Sensors on Transmission Line
Authors: Fan Song Hai , Yang Shu Hong
Published: December 2014

The temperature of transmission line is an important parameter in the condition monitoring system on transmission line and its measured value is affected by the state of sensors. General regression neural network (GRNN) was used to construct an auto-detection network for temperature sensors of transmission line. Optimizing design of network, error controlling and effect testing were studied, and also a method of threshold for sensor detection was advanced. The network is verified by practical data from a 220kv transmission line in Sichuan Province and is proved to be with good value of engineering application for sensor state detection of unit.
Design and Implementation of Humanoid Robot Based on MK60 Embedded Microprocessor
Authors: Tao Jie , Wang Xin , Zhang Tian Hui , Tan Yue Hui , Sun Hui Xian
Published: December 2014

An intelligent robot system is designed based on MK60DN512 embedded microprocessor, in the process of system design, the laser sensor detection sub system is researched, and microprocessor is used to control the multiple steering for robot walking posture adjustment between the robot joint angles, multi actuator position control is obtained, and humanoid robot adjust posture recognition is realized, according to the recognition results, the posture is adjusted, humanoid robot hardware design is taken, humanoid robot hardware design includes surface monitoring subsystem, space orbit simulation part, etc. The humanoid robot software design of robot is taken, combined with the robot walking track rules, the software structure of intelligent robot is designed, 7 degrees freedom coordinate system and link coordinates are constructed based on D-H theory, robot working space is obtained. The hardware part includes 4 parts: MK60DN512ZVLQ10 servo driven, power board, and main control board. The test results show that the humanoid robot has high control precision, the entire race walking of robot control system is simulated with 3cm/s, and the performance is stable, it shown good application value in the robot design.
QXAFS Data Acquisition System Based on EPICS at SSRF
Authors: Zhou Yong Nian , Jiang Zheng , Zheng Li Fang , Li Yong Ping
Published: December 2014

A Quick-scanning XAFS (QXAFS) data acquisition system based on EPICS is achieved at the Shanghai Synchrotron Radiation Facility (SSRF) XAFS beamline. The hardware and software system are introduced. Gas ionization chambers, current amplifiers and data acquisition card are utilized to obtain the X-ray intensity before and after the sample. Four fine QXAFS spectra with an energy range of 1.2 keV at the Cu K-edge have been collected in 5 seconds. The results indicate the good repeatability of the QXAFS data acquisition system. It makes a lot of sense for the researchers to carry out experimental study at SSRF.
Simulation and Analysis of Rectifier Circuit Based on Double Closed-Loop Vector Control Method
Authors: Zhao Shu Tao , Ren Jian Feng , Jiang Dan , Xu Yu Tao
Published: December 2014

Pulse width modulation (PWM) technology based on rotating coordinate transform is a new type of rectifier control method. Through the electromagnetic transient process of the analysis of the rectifier circuit we can verify the accuracy of this control method. Therefore, this paper first analyzed electromagnetic transient process of the rectifier circuit. By changing the phase and amplitude of voltage to realize the active and reactive power decoupling control independently. Than,it built the simulation model of rectifier circuit with the electromagnetic transient analysis software PSCAD. This cricuit is controlled by PWM based on double closed-loop vector. The simulation and analysis of the circuit are performed on the basis of the model. The simulation results can reflect the electromagnetic transient process of the circuit accurately,so as to verify the correctness of the proposed control method to control the rectifier circuit.
Research on Fault Prediction Method of Power Electronic Circuits Based on Particle Swarm Optimization RBF Neural Network
Authors: Wang Shen Yu , Chen Dan Jiang , Ye Yin Zhong
Published: December 2014

Aiming at the issue of fault prediction technique of power electronic circuits, a method based on characteristic parameter data and Particle Swarm Optimization RBF(Radial Basis Function) Neural Network for the fault prediction of power electronic circuits was proposed. Taking the Buck converter circuit as an example,the fault prediction of power electronic circuits was achieved. Firstly,the output voltage was selected as monitoring signal, then the average voltage and ripple voltage were extracted as characteristic parameters. Lastly Particle Swarm Optimization RBF Neural Network was used to predict the fault. The experimental results show that the Particle Swarm Optimization RBF Neural Network is more accurate in predicting than the only RBF Neural Network.The new method can trace the characteristic parameters’ trend and can be effectively applied in fault prediction of power electronic circuits.
Study on the Application of PNT Technology in the Flow Control Technology of Power Distribution Network
Authors: Xu Rui Lin , Xu Xin , Ren Hai Jun , Qiu Xiao Ping
Published: December 2014

With the continuously intelligence of power grid, and as an important part of it - the power distribution network is undertaking a variety of tasks, result in flow in the network increasing sharply and then arising much block in the business of power distribution network, therefore, how to efficiently operate the distribution network is imminent. In this paper, we apply the PNT technology to solve it. Firstly, introducing what the PNT is, and then describing its application in the power distribution network, bringing out its principle, operation framework and so on. After analyzing, we find that it really succeed in improving effective utilization rate of the network resources, such as routers, links and so on, and also can reroute the business data flow when there is a failure in the path. At last, put forward its achievement in the control of power distribution network flow.
Data Acquisition and Control System Based on CAN Open Network
Authors: Xia Fei , Xia Zong Ze , Huang Xiao Bo , Song Li
Published: December 2014

This paper describes the design of a CAN bus network industrial data acquisition and control system based on the application layer protocol, the CANO pen protocol. The structure of the control system is for the distributed control system. In this paper, it discuss the network for data acquisition and control system, Ethernet access control system, and provides convenience for remote control and data acquisition and processing. The software part of this design is the real-time operating system, which make the system more secure, efficient operation.
Design of Hybrid Ambient Energy Harvesting Antenna for Wireless Sensor Nodes
Authors: Xu Lei Jun , Wang Chang Shuo , Xue Bai
Published: December 2014

To the high maintenance cost for changing wireless sensor’s battery in Internet of Things (IoT), a hybrid ambient energy harvesting system for wireless sensor’s power supply is proposed. The system can collect the ambient RF energy, vibration energy and light energy, converts them into DC supply. This paper focuses on the analysis and design of the hybrid energy harvesting antenna, using a novel structure to combine three energy receivers in one antenna, which reduces the size and the cost effectively. The antenna operates at both 3G mobile frequency (1.9GHz) and 4G mobile frequency (2.6GHz), the measured input return loss is 24.3dB and 19.9dB, respectively.
Based ARMK10 Electromagnetic Sensor A/D Converter Design and Implementation
Authors: Bi Chun Guang , Kong Wei Tian , Lu Ye Ming
Published: December 2014

This paper-based design Kinetics ARM-Cortex M4 MK10DN512ZLL10 microprocessor detecting through the use of electromagnetic sensors has 10mH 100mA alternating current conductor, a continuous analog signal obtained through the solenoid to the LM358 chip amplifier many times the signal amplifier circuit , and then the analog signal is converted by the algorithm into a digital signal, and these values ​​can be obtained through a filtering process after a smooth and accurate digital microprocessor for processing.
A Novel Tapered Optical Fiber-Based F0F1-ATPase Nanobiosensor
Authors: Wang Guan Jun , Wang Zhi Bin
Published: December 2014

In this paper, a novel high sensitive nanobiosensor based on the combination of F0F1-ATPase molecular motor and Φ100nm tapered optical fiber is described, which as we known has never been reported before. Since the tapered optical fiber tip is well matched with the F0F1-ATPase complex in size, a superb sensitivity is theoretically expected. Experimental results show that this nanobiosensor’s sensitivity is about 3.5 times higher than the result of the experiment conducted on a F0F1-ATPase modified ordinary Φ50μm multimode fiber biosensor. The detecting time could be decreased correspondingly. Therefore a cheap, high sensitivity ,fast response, single molecule detection of biomolecules such as epidemic viruses would be achievable using this tapered optical fiber-based F0F1-ATPase nanobiosensor.
Building Efficient Cloud Platform to Deal with Challenges of New Demand from Smart Grid
Authors: Yu Jun , Wu Xiao Zhi , Sun Ning , Zhu Guang Xin , Qian Lin
Published: December 2014

With the introduction of advanced information technology such as cloud computing, virtualization, we will solve the current and future IT construction difficulties. It can also be advantageous to improve the rational allocation of computing resources and improve the utilization rate through the application of this new type of resource organization, distribution and usage patterns. Finally it will promote energy conservation and emissions reduction, lift up green computing development.
A Multi-Channel Large-Capacity Acquisition and Storage System
Authors: Zhao Zhi Peng , Wang Jun , Mai Chao Yun , Zhang Yu Xi
Published: December 2014

In this paper, a multi-channel large-capacity acquisition and storage system is prototyped to meet the urgent need of multi-channel analog signals’ acquisition and analysis. Composed of an acquisition board and storage board based on FPGA, the system could acquire 4 channel signals and store them in 512GB flash array. Gigabit Ethernet is used to connect the system and PC, which ensures high throughout between them. Ping-pong operation and pipeline technology are applied to cover the programming time of flash to improve the access speed. The system is portable, stable, and expansible, and could be used in various areas.
Study on the Control Strategy of Wind Farms Connected to Power Grid by VSC-HVDC
Authors: Xue Min , Zheng Hui Ping , Song Shu Yong , Hao Xin Jie
Published: December 2014

The technology of VSC-HVDC transmission has a high degree of flexibility and controllability.This paper researches the control strategy of VSC-HVDC and the operating principle of the wind turbine, which can effectively enhance the stability of power system in the region of wind farms, improve the long-distance transmission capacity of wind power and stabilize the voltage level of public connection point.
A Design Technique and Structure for Optical Fibre Vibration Sensor
Authors: Sun Ke Xue , Li Xian Jun , Zhang Shao Fang , Zheng Hao
Published: December 2014

This paper reviewed techniques of vibration sensors, studied structure and working principle of phase modulated optical fiber vibration sensor, and designed a new structure of non-contact optical vibration sensor. Use this structure, expect accuracy of 0.1um can be obtained in the range of 1mm. At the same time, this system is simple, anti-interference ability, high reliability and ease of practical.
Design and Implementation of Digital Frequency Meter Based on SCM
Authors: Zheng Wei Qiang
Published: December 2014

The digital frequency meter was a device to detect and display the frequency. In many design complexity, features a variety of electronic devices, the digital frequency meter was one of the essential equipment. It was widely used in various fields. The core of the frequency meter is AT89C51 microcontroller. It used SCM counting and timing functions to achieve the measurement pulse within a certain gate time, and it uses LED digital display tube displays the measured frequency. The device has a high frequency accuracy measurement, real time, and it has a simple, easy to carry, strong expansion capability, a wide range.
A Scheme Based on Embedded Processor for Network Video Surveillance System
Authors: Wang S.M. , Yao W. , Yan M.X. , Wen G.Z.
Published: December 2014

A scheme based on 32-bits S3C2440 of ARM920T and Linux OS for network video surveillance system is proposed. The video signals are collected by a USB camera and are coded by H264. The data are then transported to the network by a standard Ethernet port and are displayed by a WEB server. The network camera has an independent IP. Remote users could dispatch and browse the whole network resources to achieve real-time monitoring with their PC standard web browser.
The Design of Bandgap Reference Based on Empyrean Aether Software
Authors: Qu Wei , Hou Li Mei , Sun Xiao Xin , Sun Jing Yu , Li Liang Yu
Published: December 2014

A high-performance bandgap reference voltage source design method is proposed in this paper, according to the shortcomings of traditional bandgap reference voltage source. This method combined CSMC 0.35μm CMOS process with Aether software technology, enabling to improve the bandgap reference source op amp performance and take into account accuracy and stability of the system. From the experimental results: this bandgap reference voltage source output voltage has changed about 63 mV when the temperature varied from to , and the line regulator is 0.4mV/V when the power supply voltage varied from 3.2V to 3.3V. This system has advantages of high accuracy and good stability.
A Real-Time Sequence Detection Algorithm for Floating Point Unit Design
Authors: Sun Wei , An Jun She , Yang Shuang
Published: December 2014

Sequence detection is used in many algorithms and applications. Sequences are different depending on different demands. In the process of floating-point CORDIC coprocessor design,data are need to change from floating point format to fixed point format. This process is necessary to detect the number of consecutive zeros. We design the leading-zero-counting algorithm to achieve this function, and this conversion process is completed in a very fixed short time, to ensure the needs of the floating point CORDIC coprocessor.
Research on the Allocated Capacity of Energy Storage Based on Adjustment of SOC
Authors: Dai Wu Chang , Dong Yu , Zhao Xin Fei , Shang Xian Jun
Published: December 2014

In order to remedy errors in wind power prediction, a common method adopted in wind farms is the configuration of a certain capacity of energy storage at the grid interface. The traditional approach for configuring capacity ignores the problems of excessive allocation and the adjustment of SOC, and for this reason, the paper proposes a model of wind power coupling by adding a resistance load at the grid connection point. In addition, this paper proposes a control strategy to improve the operation of energy storage systems through the adjustment of SOC in order to maintain a high level of SOC, and proposes a new approach to deploying storage capacity based on this. According to the analysis of a wind farm in Northeast China, a new approach to the configuration of the energy storage can use local utility of a little electrical energy to reduce the allocated capacity, and furthermore, this method also has better control characteristics.
Analysis Software for Coaxial Filter Based on MATLAB
Authors: Li Pei , Yang Li
Published: December 2014

In this paper we present a coaxial filter analysis software based on MATLAB. Our software can obtain scattering parameters’ curve of the filter which is composed of high-low impedance coaxial cables. In order to obtain scattering parameters’ curve, we introduce a method of making distributed parameters equivalent to lumped parameters and adopt A parameter matrix approach to get it. Our software has taken into account the influence of step capacitances. Compared with the commercial software HFSS, our software has advantages of strong pertinence, operating fast and easy to adjust. Finally, we use HFSS to validate the correctness of our software.
Investigation on Thermal Energy Storage Characteristics of Thermocline Tank with Mixture Filler Materials
Authors: Han Jing Xiao , Yang Yong Ping , Wu Jia Rui , Hou Hong Juan
Published: December 2014

An experimental setup for indirect contact sensible heat TES was built. Air was chosen as the heat transfer fluid to flow inside the tubes and carry heat, while the mixture in the tank contacts the outside of the tubes. The results were also compared with pure sand filler material. It can be found that and the TES efficiency of mixture increased by 18% compared with pure sand, what’s more, its temperature gradient along the radical direction was also lower, while its temperature gradient along the axial direction was higher, so the mixture was better. Under various air inlet temperature (60-70°C), TES performances were similar, but for real power generation, further work on optimism temperature range was needed. Air velocity was also important to TES tank, lower velocity can not only increase the TES efficiency, but also enlarge the thermocline temperature gradient.
Research on the Application of Linearization Pre-Distortion Technique for Memoryless Power Amplifier
Authors: Wang Su , Zheng Lang , Yang Ze Ming , Zhong Cai
Published: December 2014

In order to improve the nonlinear problems of power amplifier, this paper discussed about the nonlinear characteristic of power amplifier without memory and put forward a kind of new pre-distortion model. The MATLAB simulation process was being used to obtain the input and output amplitude curves, and calculated the normalized mean square error NMES and error vector magnitude EVM, the results show that the power amplifier linearization improved after pre-distortion processing.
Simulation of Data Processing for High-Performance Computers
Authors: Wang Da Long
Published: December 2014

As the non-uniformity of multi-channel output in ultra-high resolution CCD imaging system causes image seam problem, CCD multi-channel output non-uniformity correction method based on TDI read-out way is put forward. This method images only with image irradiance point, and with one image, a large amount of correction measuring points can be gained; on one hand, accuracy matching output characteristics can be ensured, and on the other hand, the influence of light source adjustment on correction outcomes can be erased. Experimental results show that, this method has high degree of correction accuracy, better than two-point method and multi-point method correction, and it can image only once.
Defects Cause Analysis Generated by Five-Axis NC Machine Tool and Optimization
Authors: Fan Jin Wei , Yan Hong Xia , Tang Yu Hang , Song Yi
Published: December 2014

In view of defects-"chew cutting" generated by the five-axis nc machine tool in the process of machining the S sample, the machine tool motion error model is established based on multi-body system theory. After that,combining sensitivity analysis theory with the research of machine tool processing defect causes.Then find out the main error terms which take great responsibility of machining defects and optimize related motion components,to meet accuracy requirements before leaving the factory.
The Theory and Realization Method for Weak-Magnetic Environment Simulation
Authors: Zhang Rui Feng , Chi Wei , Jin Lian Gan
Published: December 2014

The horizontal component of geomagnetic field is so weak in high latitude area that the magnetic navigation equipment available can not work, a method is introduced to simulate this weak-magnetic environment to by using artificial controllable magnetic field to neutralize geomagnetic horizontal component .Theoretical and simulation analysis is involved; using circular Helmholtz coils, an experimental device is made for the experimental research for weak-magnetic environment simulation. The experimental results show that this method has a certain feasibility