bluuebunny/crossref_metadata_2025 huggingface dataset:
Development of Diagnostic Equipment for ECU Parts Used in Electric Vehicles
Authors: Nan Jin Rui , Huang Jun Kui , Chai Zhi
Published: September 2013

Electric vehicles use lots of ECU controllers in the CAN network, the quality of ECU parts used in vehicles is closely related to safe driving. This paper develops a kind of fault diagnostic equipment for electric vehicles ECU controllers. This device has designed digital input signal acquisition module, the output switch signal module, power supply module and fault simulation module based on CAN bus communication principle. Then we use LabVIEW developing computer program in order to monitor and control the whole system.
A Decision Support System with EDA_PR Algorithm for the Hot Rolling Scheduling
Authors: Zhang Xiao Xia , Ma Yun Yong
Published: September 2013

This paper presents a hybrid algorithm for the hot rolling scheduling problem, which is derived from the actual steel production, and some features make the solution methodology more difficult. The hybrid strategy is based on the solution construction mechanism of estimation of distribution algorithm (EDA) with path relinking (PR), an evolutionary method, which results in a novel approach that we call EDA_PR. Moreover, a decision support system in which the algorithm has been embedded for the hot rolling scheduling is designed. The computational experiments show that the EDA_PR method has more potential for improvement to solve the hot rolling scheduling problem compared with the manual scheduling method.
Finite Element Analysis of the Drum-Shape Cavity Fluidic Gyroscope Sensitive Mechanism
Authors: Mei Chuan Zhi , Piao Lin Hua , Zhang Bao Li
Published: September 2013

Against the deflect that the existing fluidic gyroscope airflow channel structure was easy to cause the flocculating flow. This paper presented a kind of elliotic-drum flow cavity structure. Using the finite element method, calculated the flow field in the closed cavity at different angular velocity input. The results showed that the gas flow path of the main airflow distribution was streamlined, there did not form the vortex area which could reduce the energy additional losses, when the angular rate input changed, then the jet flow field distribution didnt keep equal and symmetrical, the jet speed difference at the hot sensitive wire changed with angular velocity, thus revealing the drum-shape cavity fluidic gyroscope sensitive mechanism.
Design of Microwave-Oven Hybrid Heat Treatment System Based on LabVIEW
Authors: Lu Qi Rong , Tang Qi Lin , Wang Lei , Zhu Jie , Luo Jian Hui
Published: September 2013

The heat treatment technology is a weak link in engineering technology in china. For the traditional microwave heat treatment system, the microwave electric field inside the oven can not be well-distributed. In case of the traditional oven heat treatment system, however, the materials dried process is very long. In this paper, we introduce a microwave-oven hybrid heat treatment system related to industrial production line, the proposed with both advantages of high efficiency of microwave and good thermal distribution of the oven, which can be applied for the determination of degree in heat treatment process according to the concentration of the produced gases. Based on the computer and LabVIEW, the control system can control the whole process of heat treatment directly and accurately in real-time.
Analysis of Influencing Factors on Mine Gas Emissions Based on Grey Correlation
Authors: Tang Xiao Yan , Ke Liu , Wang Pei Yun
Published: September 2013

Statistical analysis for the data of HC mine gas emission rate by using grey relational analysis method, the index system effecting on mine gas emission factors are established with the method and the relational degrees between the factors and mine gas emissions are analyzed. The main factors effecting on mine gas emission are determined based on the size of relational degree by the quantitative analysis. The results show that the method is simple, and provides more flexibility to comprehensive analysis of the statistical data, and overcome the shortcomings of a different dimension data can not find regular. Its useful to find the main control factors effecting on mine gas emission.
Secondary Optical Design of LED Stage Lamps
Authors: Wang Kun , Li Jian
Published: September 2013

High brightness and high power light emitting diode (LED) based lamps have been identified as one of the solutions for energy saving light sources in illumination. Owing to its high energy efficiency, high color rendering and long life, LED lamps are promising. However, it is important to design a secondary optical lens for the LED lamps to obtain good output efficiency and a good light distribution pattern. In this paper, we proposed and developed a secondary optical lens design blueprint for LED stage lamps. A cone lens for stage lamps was designed and the desired illumination was achieved. The design procedure of the cone lens is presented. The simulation of the stage lamps is carried out in Tracepro 7.0. The results show that the cone lens can rearrange the luminous flux accurately and reasonably. A stage lamp with a uniform and circular luminous flux distribution is obtained.
Detection of Differentially Expressed Proteins of Capsulation-Resistant and Sensitive Osteosarcoma Tissue
Authors: Zhang Li Heng , Li Liang
Published: September 2013

The tissue samples of cisplatin-resistant and sensitive patients with osteosarcoma were obtained through chemosensitivity testing before. The typical one of cisplatin-resistant and sensitive osteosarcoma tissue samples were analyzed by two-dimensional electrophoresis and the relevant differentially expressed proteins were obtained. The sequences of differentially expressed proteins were obtained through the analysis of mass spectrometry technology to be identified comparing with protein databases. It is concluded that there are differentially expressed proteins in tissue of cisplatin-resistant and sensitive osteosarcoma.
A Study on the Automatic Identification of the Semantic Truth-Value of "Chayidian Mei P" Construction
Authors: Lu Cheng Fa
Published: September 2013

The chayidian mei P(almost not P) construction has two possible semantic truth-values, namely P and not P, for which reason the computer fails to identify the true value of its semantics by the conventional syntactic rules. Many methods with poor operability were deduced to identify the semantic truth-value, leaving many cases unable to be explained with these methods. This paper employs deductive method to demonstrate that the hearer identifies the semantic truth-value by comparing the occurrence possibilities of P and not P, providing an alternative for computer to automatically recognize the semantic truth-value of the construction.
Design of Disaster Early Warning Management System of Digital Greenhouse
Authors: Zhang Mei Xia , Sun Jun , Li Zheng Ming , Huang Min Min , Lv Wen Xia , Dai Ze Gao
Published: September 2013

For the purpose of providing crops a health and safety growth, it is necessary that the early warning management system is well established. In this paper, the date management module of historical climate and disaster is designed, the monitoring information management module of current weather and disaster is designed, and the early warning management module of pest and disease is completed. The successful result of running system shows that the system can strengthen early warning of disasters and improve the level of information collection and rapid processing of disaster, and improve capability of emergency response to cope with disasters.
Research of Warship Equipment Faults Diagnosis System Based on Integrated Reasoning
Authors: Yu Bei Yu , Fan Hai Feng
Published: September 2013

Warship equipment diagnosis mechanism becomes more complicated with wide use of new technology. How to obtain the diagnosis result is a difficult problem in the field. According to the principle and shortage of traditional fault diagnosis, a new reasoning method was introduced for the warship equipment fault diagnosis, the method integrated the case-based reasoning (CBR), rule-based reasoning (RBR) and bayes-based reasoning (BBR), which can increase the systems flexibility and reasoning accuracy. The knowledge base, knowledge presentation and classification, reasoning process and reasoning realizations were mainly analyzed. The experiment shows that the reasoning method can provide a scientific basis for analysis and diagnosis of warship equipment.
Instability Analysis of Once-Through Steam Generator
Authors: Hou Su Xia , Luo Ji Jun , Xu Jun , Zhang Qing Hua
Published: September 2013

Considering the characteristic of Once-Through steam generator, the simplified dynamic model with lumped parameters moving boundary is used to describe two-phase flow feedback system in this paper. The feedback system and transfer-function for instability analysis are derived from the model. The instability analysis of the system is based on the frequency-domain analysis method. The Matlab software and its simulink tools are used to analyze the instability of the system. Then the stability boundary under the effect of some major factors is obtained. The results of stability boundary are compared to the concerned experiments by frequency-domain method.
Sludge Drying by Virtue of the Solar Energy and Reclaimed Water Heat Pump with Double High-Temperature Heat Source
Authors: Xiao Xu , Xu Xiao Jun , Guan Tang Zhen , Zheng Xin , Chen Xiao Hong , Shi Guo Fei , Ma Ling
Published: September 2013

Sludge is the solid waste that generated during the sewage treatment process, because of high moisture content limits the final disposal and utilization. In this paper that solar and reclaimed water as heating heat source, It's not easy to design a new drying procedure that solar energy and reclaimed water heat pump with double high-temperature heat source, the system could make full use of respective advantages which of the solar energy, the hot of reclaimed water and heat pump. It would enhance the dehydration ratio, and high efficiency, lower energy consumption, sludge of moisture content (MC) decreased greatly; have created favorable conditions for the reuse. Technology what solar energy, air and reclaimed water heat pump with double high-temperature heat source were used to deal with sludge, the solar energy and air source heat pump were the main heating source. When the heat was insufficient, reclaimed water heat pump was turned on as energy supplementary. The dry air (70°C) was pumped into drying room continually; the moisture content (MC) of sewage was shrunk from 75% to 40% after drying.
Diagnostic and Therapeutical Tinnitus System Based on Fuzzy Rough Set
Authors: Ma Xian Min
Published: September 2013

A novel distributed system for the diagnostic and therapeutical tinnitus is introduced based on the fuzzy rough set theory in this paper. The cause of the tinnitus diseases is analyzed, and the prime symptoms of disorders of the inner ear are classified. According to a ringing or booming sensation in one or both ears, the problem of the processing model is built based on fuzzy inference, and the remedial sound intensity level of the curative tinnitus is discussed. The particular requirements and characteristics of the cure system are analyzed. Research results reveal that, based on the fuzzy rough set theory, the fuzzy membership functions can be explicitly interpreted and the extracting diagnosis rules from fault data are feasible.
Analysis of a Control Valve's Inner Flow Field Characteristics Based on CFD
Authors: Wang Liang
Published: September 2013

In this paper, the inner flow field characteristics of a control valve were analysed through dynamics simulation and showed by using the three-dimensional visualization. Through the analysis of simulation results, reasons were found for the energy loss, which was, then, reduced by the optimized flow path. Calculations about the optimized positions were carried out, the results of which showed an improvement of flow and a significant decrease in energy loss.
Mathematical Model Studies on Dispersion of Fine Non-Spherical Particles in Enclosed Spaces
Authors: Song Zi Biao , Ge Chun , Zhang Shu Xiong , Wu Xiao Lu
Published: September 2013

Study on the fine particle dispersion in the room is very important for creating and maintaining a healthy indoor environment. The paper presented a new dispersion model of fine non-spherical particles formulated in a Lagrangian way based on its dynamic characteristics. In this model, the effects of gravity, resistance, particles shape and random force were taken into account. The influences of gravity and non-spherical particles shape on its dispersion process were analyzed in theory. Simulation result and theory analysis showed the models established in the paper performed better than the random walk model.
Simulation and Analysis of PMSM Based on Space Vector Control Strategy
Authors: Zhao Gang , Zhang Nan
Published: September 2013

Permanent magnet synchronous motor (PMSM) vector control strategy is studied deeply in the paper based on the analysis of the operation principle of permanent magnet synchronous motor (PMSM). Permanent magnet synchronous motor (PMSM) speed-current double closed loop control system was built by Matlab/Simulink. The simulation results showed that the system had fast response speed, high accuracy and strong anti-interference ability and so on. It also proved that Permanent magnet synchronous motor (PMSM) vector control system had good dynamic and static performances.
Research of Thermoelectric Enterprise Marketing Management Information System Integration Model
Authors: Li Zhi Gang , Fu Ze Tian , He Jia Yong
Published: September 2013

Domestic power marketing system means more backward, and the marketing organization system is imperfect. Due to business expansion and increased market competition, Tianfu thermoelectric original electric gas marketing system can no longer meet the needs of enterprise development which lead to information islands. According to the current operating status of the joint stock company and existing problems, this paper study a large marketing integration model, and constructed a marketing network management system platform integrated with electricity, heat and gas for the thermal power enterprises. the establishment of an integrated marketing platform with electricity, heat and gas business is built on a unified infrastructure platform in order to unify customer information, marketing basic platform capabilities and customer service platform function, centralize management of electricity, heat, gas marketing business in one of a big marketing intensive management mode including electricity, heat and gas.
Comparison of the Application of 3G and COFDM in UHV Transmission Lines Inspection
Authors: Li Jue , Lu Yao , Qi Bing , Liu Xiang Jun
Published: September 2013

With the rapid construction of UHV power grid in China, the difficulty of transmission lines inspection and maintenance has increased dramatically. Thus it is urgent to adopt new technologies to replace the traditional manual mode of transmission lines inspection and maintenance. In this paper, the characteristics and applications in UHV transmission lines inspection of 3G and COFDM technology are analyzed and compared.
Design and Implementation on Auto Test Set of an Airborne Radar
Authors: Jin Fu Lu , Li Yun Peng , Wang Hong Rui
Published: September 2013

To automatic test the function and performance of an airborne radar, changeable test adapter is adopted to implement the hardware and software design of the automatic test set of the antenna, transceiver and indicator of the radar based on AT89C52. Problems such as t the different types of interfaces, the various kinds of signals and the test of microwave signal are solved successfully and the objectives of resource sharing and automatic test are realized. The test software is designed by modular structure, and with the help of automatic test set hardware, the required test items of the radar system are experimented and the test process control succeeded. Experiment results show that the automatic test set performs steadily and the results meet the requirements of the airborne radar. The set has the advantages of intelligent, manageable and reducing artificial errors. It provides effective guarantees for radars maintenance, fault diagnosis and fault detection, and has a wide application prospect with low cost.
The Application of Composite Materials in Coal Mine Production
Authors: Wang Yu Qing , Zhang Peng Fei , Li Jian Zhong
Published: September 2013

This article briefly describes the composite materials and their excellent physical and chemical properties, the application of resin-based composite materials in the coal mine are emphatically introduced; and the application of rubber-based, cement-based composite materials in coal mine are briefly introduced, pointed out that the development and application of composite materials in coal production in China has great potential and broad development prospects.
Based on Neural Network PID Controller Design and Simulation
Authors: Xu Hao , Lai Jin Gang , Yu Zhen Hong , Liu Jiao Yu
Published: September 2013

The technologic of PID control is very conventional. There is an extensive application in many fields at present. The PID controller is simple in structure, strong in robustness, and can be understood easily. Then neural networks have great capability in solving complex mathematical problems since they have been proven to approximate any continuous function as accurately as possible. Hence, it has received considerable attention in the field of process control. Due to the complication of modern industrial process and the increase of nonlinearity, time-varying and uncertainty of the practical production processes, the conventional PID controller can no longer meet our requirement. This paper introduces the theoretical foundation of the BP neural network and studying algorithm of the neural network briefly, and designs the PID temperature control system and simulation model based on BP neural network.
Study on Application of Monitoring the Melt Flow Balance of Injection Molding Process by Using Cavity Pressure Monitoring Technology
Authors: Chen Jin Wei , Yang Ling
Published: September 2013

At first this paper described the cavity pressure monitoring technology definition and work principle. Then showed that made use of monitoring the cavity pressure curve and study melt flow balance by specific example. The use of cavity pressure curve could be quickly and accurately get the best process parameters, so change the way of obtaining process parameters optimization from the "experience" basis to "scientific" basis. The article concluded it could understand deeply and grasp the relationship among the three proposals of the cavity pressure curve, process parameters and product quality.
The Algorithm of Measuring in Close-Range Photogrammetry Based on Grid
Authors: Xu Wan Li , Liu Zhun , Nie Hui Yu
Published: September 2013

The Algorithm of Measuring in Close-Range Photogrammetry based on Grid
[Purpos Due to the existence of various error sources in the close-range photogrammetry, the traditional photogrammetry algorithm cannot completely eliminate system error. The measurement precision often cannot reach the requirement and the calculation process is complicated. In order to solve this problem , a new measuring algorithm called grid measuring algorithm is presented in this papers. [MethoWe structures an ideal grid measuring space according to image point of the fixed point. Then the interested object points are mapped to the grid measuring space by the image points. We can get the position by fusing the value according to the distance to the nodes.For illustration,a photographic example is utilized to show the feasibility of the grid measuring algorithm.[Result The experimental results show that the error of grid measuring algorithm is controlled within half pixels. [ConclusionThe positioning precision of this algorithm is obviously superior to the traditional algorithm and the calculation is simple.
The Study of Electrode Size on Sensitive Field Effect of Electromagnetic Flow Meter in the Measuring Fluids Containing Non-Conductive Body
Authors: Wang Yue Ming , Kong Ling Fu , Li Ying Wei
Published: September 2013

Electromagnetic flow meters are widely used in two-phase or multi-phase flow measurements in recent years. In this paper, simulation model is established to study the flow meter response characteristics which exist a non-conductive body (oil bubble) in the fluid by use finite element software ANSYS. We analyze different electrode size impact on the response characteristics of electromagnetic flow meter in the measurement of two-phase or multi-phase flow which includes non-conductive material in the fluid, which provides reference for design of the sensor electrode sizes, and provides a theoretical basis for error analysis measuring two-phase or multi-phase flow under different electrode sizes of electromagnetic flowmeter.
Design of an Intelligent Lighting and Monitoring System of Teaching Building Based on LabVIEW
Authors: Lu Qi Rong , Zhu Jie , Tang Qi Lin
Published: September 2013

At present, there are some problems in teaching building monitoring, such as the hidden danger and waste of electricity. In view of these problems, I design an intelligent lighting and monitoring system based on virtual instrument technology. This system consists of light intensity, human body, infrared and mobile sensors. They compose the the Internet of things in this system. By using these sensors and the fuzzy intelligent dimming, the system has a very intelligent and clever lighting. Human body sensors and infrared sensors can help the system monitor the important classrooms and computer rooms. Based on LabVIEW, the system has a excellent interactive operation interface and powerful data acquisition and network functions. With the functions and communication medium such as the Internet and ZigBee, the system can achieve monitoring the real-time illumination and the number of people in monitoring area. This system can also be operated by the remote client computers which equip LabVIEW. It is convenient to extend this system to the remote monitoring system.
The Traffic Prediction and Control Based on Rough Set Theory
Authors: Fan Ai Long
Published: September 2013

Intelligent traffic control and traffic guidance systems have become the core question of ITS research, but real-time and accurate traffic prediction and control are two keys that they may achieve. On this basis, Research priorities are proposed and it introduces general ideas of short-term traffic flow forecasting and control, and uses the rough set and fuzzy theory to predict and control traffic flow. Compared with the actual, forecasting results' error is smaller, and the same time the jam of intersection is effectively alleviated.
Robot Visual Servo Based on Particle Swarm Optimized ADRC
Authors: Liu Xiao Li , Xiong Liang Peng
Published: September 2013

Active Disturbance Rejection Controller (ADRC) is a kind of nonlinear controller for a set of uncertain systems. Particle Swarm Optimization (PSO) algorithm is a new evolutionary computation technique and is inspired by social behaviour simulation. The ADRC was adopted to realize the uncalibrated hand-eye coordination control of six degree-of-freedom robot and the controller parameters were optimized by PSO. Simulation results prove the effectiveness of the algorithm.
The Measurement of 3D Object Shape Based on Fourier Transform Profilometry
Authors: Dong Huan
Published: September 2013

In this paper, we present an optical profilometric technique for 3D shape measurement--Fourier Transform Profilometry (FTP). In contrast to other optical techniques, the grating pattern will in its spatial frequency fields as well as in its space-signal fields which projected onto the object surface and was Fourier-transformed and processed. This technique only requires a single fringe pattern up to no more than two to reproduce 3D object shape. FTP has a much higher sensitivity to the fringe quality than other techniques. We design a system which has a high-resolution system composed of a video projector and a digital camera. A fringe pattern of programming by computer is projected onto the free surface and its diagram is recorded by the camera. The deformed fringe pattern arising from the surface deformations is later compared to the unreformed (reference) one, leading to a phase map from which the free surface can be reconstructed after some series of processes.
Design of Mobile Video Monitoring System Based on Android
Authors: Zeng Hao , Chen Xu , Fu Yan Hui
Published: September 2013

This paper introduces a mobile video monitoring system Based on Android. This Mobile video monitoring system consists of video acquisition device, DVR, server, wireless network and mobile monitor client. Hierarchy of RTP/RTCP in the system is discussed in detail, as well as the decoding of the Real-time data streams in the client.
The Research of Workflow Access Control Methods Based on Spring Acegi
Authors: Yin Xu , Zheng Hai Bei
Published: September 2013

Access control through restricting users to access to resources, prevents invasion of illegal users and legal users access to unauthorized resources to ensure integrity and privacy of workflow data, which is the key of workflow security mechanism. According to the identity authentication and access authority control, the paper analyzes the safety management entrusted mechanism of Acegi which is Spring security framework, makes full use of its characteristics of depended injection (DI), and realizes statement and configuration of all kinds of safety components such as authentication management and access decision management.
Evanescent Fiber Sensor for Determining Water Content in Polar Organic Solvents
Authors: Wang Yi Ping , Xiong Fei Bing , Zhu Wen Zhang
Published: September 2013

The feasibility of sapphire fiber sensors based on evanescent absorption spectroscopy in the infrared range for determination of water content in polar organic solvents has been investigated. Evanescent absorption spectra of sapphire fiber sensors in glycerol, ethanol and glycol with different volume concentrations were recorded and analyzed, respectively. Evanescent absorbance around 2.7μm of fiber sensors in those organic solvents has been utilized to implement for in situ monitoring water concentration in organic solvents. The evanescent fiber sensors for monitoring water concentrations in those organic solvents are acceptably accurate, cost-effective and reliable. Overall results demonstrate that the sapphire fiber sensor based on evanescent absorption is a promising candidate for prediction of water content in polar organic solvents in on-line and remote situation.
A Novel Temperature Compensated Amplifier
Authors: Liu Cheng Peng , Shi Jian Gang , Wang Guo Qiang , He Zheng Rong
Published: September 2013

A novel configuration for a novel temperature compensated amplifier is presented in this paper. This amplifier exhibits high performance including Return Loss is well blew-12dB from DC to 6GHz, At 3.1GHz, the typical gain is 14.1dB, noise figure is 3.0dB, 1dB compression point is 13.9dBm.with insensitivity to temperature.
A Multiprocessor RTOS Design of uC/OS
Authors: Wang Rui , Li Zhan Huai
Published: September 2013

In many safety-critical missions, more and more Multiprocessor Embedded Systems are used to provide the ability of fault tolerance. Using Operating System can easy software design and make software development more efficient. Because of the limited resource in Embedded Systems, many advanced technologies used in common desktop multiprocessor environment have not been used in Embedded RTOS yet. In this paper, we introduce the technologies of Virtual CPU Pool and Multiprocessor Processor Communication Interface to solve task distributing and communication between deferent CPUs. After using and mending uC/OS, I finally realize and test an Operating System in a kind of SMP multiprocessor hardware module successfully.
Distributed File Information Management System Based on Hadoop
Authors: Sun Jun Xiong , Chen Yan , Li Tao Ying , Wang Ren Yuan , Li Peng Hui
Published: September 2013

There are two main problems to store the system data on single machine: limited storage space and low reliability. The concept of distribution solves the two problems fundamentally. Many independent machines are integrated as a whole. As a result, these separated resources are integrated together. This paper focuses on developing a system, based on SSH, XFire and Hadoop, to help users store and manage the distributed files. All the files stored in HDFS should be encrypted to protect users privacy. In order to save resources, system is designed to avoid uploading the duplicate files by checking the files MD5 string.
Design of Framework for Campus Network Transition from IPv4 to IPv6
Authors: Ye Han Min , Li Mi Ran
Published: September 2013

Pv6 protocol, which should replace the actual IPv4 protocol, brings many new possibilities and improvements considering simplicity, routing speed, quality of service and security. In the case of the normal working of the existing IPv4 campus networks, this article puts forward the strategy to access Cernet2 for campus network and all stages network architecture of campus network transitions to IPv6 network. According to the different stages, we can select suitable transition mechanism to achieve the interoperability of the whole network.
Performance Analysis of Improving ZigBee Wireless Network Using AODV Mesh Routing Model
Authors: Malek Al Gabri , Li Chun Lin , Liu Yun Chang , Liu Yan Pei , Wleed Al Museelem
Published: September 2013

ZigBee is an emerging standard for the low cost, low power and low rate wireless networks and the ZigBee technology is well suited to a wide range of energy management and efficiency applications in areas such as building automation, industrial, medical and home automation. ZigBee is a version of AODV routing protocol, where the routes are discovered RREQ through the network by the source broadcasting and sending RREP back the destination, so make ZigBee routing efficient, we used AODV mesh topology methods to send and receive data from source to destination and vice versa. In this paper we present an improved version of ZigBee-AODV mesh network, which utilizes and divide the topology of network into one or more logical clusters and restricts the flooding of route request outside the cluster. ZigBee-AODV mesh network uses nodes of the same cluster to share routing information, which significantly reduces the route path discovery and created cluster formation to decrease the routing path. The proposed protocol has higher reliability and lower overhead than AODV.
Study and Realization of SNOW 3G in LTE System
Authors: Li Xiao Wen , Liu Fang
Published: September 2013

In the wireless access technology system, reliable and efficient security algorithm is an important guarantee which realizes the high-speed data transmission of LTE (Long Time evolution). The SNOW 3G was used in LTE for its own advantages for security algorithms. This paper describes the procedure of security. Focus on the principle of confidentiality and integrity algorithms of SNOW 3G , then analyses the performance and gets the test result of this algorithms at last.
An Improved SVD-LMMSE Channel Estimation Algorithm of LTE System
Authors: Zhou Yang , Dong Hong Cheng , Li Xiao Wen
Published: September 2013

This paper first introduces the MIMO-OFDM (Multiple Input Multiple Output-Orthogonal Frequency Division Multiplexing) system model, and then studies several classical channel estimation algorithms: LS (Least Square) algorithm, LMMSE (Liner Minimum Mean-Square Error) algorithms and SVD-LMMSE (Singular value decomposition) algorithm. Finally, based on the DCT transform domain channel estimation, the original SVD-LMMSE algorithm has been improved. Theoretical analysis and simulation results show that: The improved SVD-LMMSE algorithm not only can reduce the complexity of the implementation, but also has more superior performance.
Cloud Service Model Based on University English Reading Database
Authors: Dun Zu Chun
Published: September 2013

The Rapid development of cloud computing impels the new situation of information technology services in foreign language teaching in universities, and brings more quality requirements to subject librarians in universities. The teaching database of English reading in universities combines image, audio, video, text, animation and interactive contents for teaching to create a fresh, vivid, interesting English learning environment. The paper proposes the implementation strategies of university English reading teaching datebase construction and the cloud service model according to the concept of cloud computing; It thinks that the subject librarians should supply personalized services for the readers, at the same time, they should also strive to be cloud librarians.
Applied Research of the Decision Tree Method in Personalized Distance Education System
Authors: Wang Jian Wei , Wang Xin , Zhao Lan Bo , Wang Yu Hong , Li Hui Jun
Published: September 2013

Modern Distance Education is a new type of teaching style which generated with the development of computer network technology and multimedia technology. Distance Education always aims at individualized education and personalized teaching-learning service. But how to discover the valuable discipline from a large amount of learners information and achieve personalized distance education is an issue for educational researchers to resolve urgently. This thesis discusses how to apply the decision tree method of data mining technology in distance education system to classify learners in order to achieve individualized teaching for different learners.
A Whole Rate-Distortion Optimize Pronounce Based on Wireless Sensor Network
Authors: Yu Qing Sheng , Zhang Jian , Peng Jin Xiang
Published: September 2013

Based on the Joint Video Team (JVT) of the ITU-T Video Coding Experts Group VC EG and the IS O/IEC Moving Picture Experts Group MPEG, an RD optimal Macro Block mode decision scheme for Internet error channel streaming is introduced. The scheme employs the luminance Rate Distortion (RD) optimal mode decision scheme so as to take the effects of video encoding distortion and the channel error propagation to get higher error robustness for error transmission. Based on the Wireless Sensor Network, this paper analyzes the data distortion problem when transmitting H.264 coded video stream over error-prone channel. And the authors also have discussed a widely accepted technique that introduces more intra-coded information on macro block basis. Additionally, this paper introduces a simple loss and multiplication factor estimation method, the rate-distortion optimized assessing strategy over the whole situation.
Big Data Storage Method in Wireless Communication Environment
Authors: Liang Ye
Published: September 2013

Big data phenomenon refers to the practice of collection and processing of very large data sets and associated systems and algorithms used to analyze these massive data sets. Big data service is very attractive in the field of wireless communication environment, especially when we face the spatial applications, which are typical applications of big data. Because of the complexity to ingest, store and analyze geographical information data, this paper reflects on a few of the technical problems presented by the exploration of big data, and puts forward an effective storage method in wireless communication environment, which is based on the measurement of moving regularity through proposing three key techniques: partition technique, index technique and prefetch technique. Experimental results show that the performance of big data storage method using these new techniques is better than the other storage methods on managing a great capacity of big data in wireless communication environment.
Traffic Accident Reconstruction Technology Research
Authors: Yang Xiao Long , Li Ping , Lv Tao , Liao Xue Hua
Published: September 2013

Based on the virtual simulation theory, we used three-dimensional modeling software to build modeling road facilities (vehicles, trees, street lights, etc.) for simulating the accident environment, and by using OpenGL technology, achieved reading, displaying and controlling the three-dimensional models. This dynamically realized the three-dimensional animated simulation of vehicle movement. Simultaneously we have calculated in progress the simulation of vehicle crash with the basic theory of automobile collision, vehicle collision model and the law of conservation of energy and momentum. Finally, we constructed a flexible platform for the simulation experiment. The platform is enabling to add and update road, trees, street lamps and house on the simulation environment dynamically, and has ability to analysis the traffic accident. This could give an assistant to the handling traffic accidents.
Design and Implementation of an SVG Editor for Power System
Authors: Wu Ke He , Cheng Bo Hao , Wu Jin Shui , Yuan Yue
Published: September 2013

It is the fundamental requirement for power system graphical editor to be able to draw rapidly, precisely and allocate corresponding configuration parameters for the power components and reserve operation interface. Element of this editor uses the SVG format and defines metadata tags based on the CIM specification carrying metadata in the SVG document which makes the graphics and data can be linked to a unified canonical form. The editor achieves the purpose as follows: editing, storing, and exporting a wiring diagram; importing a wiring diagram from other systems; automatically extracting and storing layers and elements in the importing process; creating and maintaining the user-defined primitive library or layer library and binding associated data. This SVG graphics editor for power system has met the functional requirements of the user and has been applied in several practical projects.
A Backward Compatible Multichannel Audio Compression Method
Authors: Gao Xue Fei , Yang Guo , Wang Jing , Xie Xiang , Kuang Jing Ming
Published: September 2013

This paper proposes a backward-compatible multichannel audio codec based on downmix and upmix operation. The codec represents a multichannel audio input signal with downmixed mono signal and spatial parametric data. The encoding method consists of three parts: spatial temporal analysis of audio signal, compressing multi-channel audio into mono audio and encoding mono signals. The proposed codec combines high audio quality and low parameter coding rate and the method is simpler and more effective than the conventional methods. With this method, its possible to transmit or store multi-channel audio signals as mono audio signals.
Application of MATLAB in the Analysis of Reliability Data
Authors: Chen Gui Qin , Wei Xiu Ling , Cui Gang , Wang Xin Ge , Li Lei
Published: September 2013

This paper introduced how to use MATLAB to draw frequency histogram of reliability data distribution, estimate parameters and check up hypotheses, and realize automatic analysis of reliability data to ensure timely and precisely finishing data analysis, shorten the cycle of data disposal.
Analysis of Finite Element and Experimental Study on Elastic Body of the Grip Force Sensor
Authors: Yan Shun , Wang Chang Ming , Bao Jian Dong , He Bo Xia
Published: September 2013

A three-dimensional grip force sensor with new elastomer structure is developed. By using the simulation of finite element method, the relationship between force and strain is analyzed, the characteristic values of the key points is extracted and the coupling performance between dimensions of grip force sensor is analyzed. The static calibration system is set up and the decoupling matrix of grip force sensor is obtained. Experimental results shows that the new type sensor can eliminate the coupling among the three dimensions effectively.
Research on the Frequency Automatic Tracking in Ultrasonic Power Based on Fuzzy-DPLL
Authors: Qu Bai Da , Ni Zheng Long
Published: September 2013

Traditional frequency-tracking technique of ultrasonic power often adopts analog phase locked loop circuit. But it has some defects, such as the narrow locked-inrange and the tendency to lose phase locked with a sudden change in load, etc. Therefore, this paper proposes a composed control strategy which combines a digital fuzzy controller with phase locked loop in DSP, and the working principle and design method are gived. The experimental results show that the ultrasonic power using Fuzzy-DPLL can realize quick and accurate frequency tracking, and it can make the vibrate system work stably and efficiently, and it improves the efficiency of the power supply.
Integrating Rough Set in Evolution Agorithm for Path Planning of Mobile Robots
Authors: Yan Ji Wei
Published: September 2013

In order to improve the robot path planning speed and accuracy, this paper combined cloud theory and rough sets in path planning. First initial path group can be gained by using rough set training, then a series of feasible path group can drawn by the minimum decision rule training, finally the population based on cloud model optimization can also gained and further the best route can be acquired. The simulation results verified the effectiveness of the proposed algorithm.
Creation of Fuzzy Control Table with Data Mining
Authors: Gao Jun
Published: September 2013

A good fuzzy control table is the key to a fuzzy control system, and the systems performance mainly depends on the quality of the table. Based on analyzing fully the principles of a typical fuzzy control systems and the procedures of building a fuzzy control table, this paper presents a new method of applying the boolean association rule data mining techniques to mining of fuzzy control table directly from the database of manual operating records.
Progress of Gain-Switched Tm-Doped Fiber Lasers
Authors: Tao Meng Meng , Yang Peng Ling , Liu Fu Hua , Wu Jun Jie , Ye Xi Sheng , Yu Ting
Published: September 2013

Progress of gain-switched Tm-doped fiber lasers is reported. Different pump schemes including 1μm, 790nm, 1.6μm, 1.9μm and combined pump are described in detail. Comparisons among these different pump schemes are given. Discussions are made and other possible pump schemes are proposed.
3-D Simulation of Remote Field Eddy Current Detection for Stress Corrosion Cracks in Pipeline
Authors: Wu De Hui , Zhang Zhong Yuan , Liu Zhen Liang , Xia Xiao Hao
Published: September 2013

Three-dimensional (3-D)finite element simulation models are conducted to simulate the in-serviceinspection of the axial stress corrosion cracking (SCC) in ferromagneticpipeline using remote field eddy current (RFEC) probes. In this paper, atypical remote field eddy current probe which is internal to and coaxial withthe pipe is firstly introduced. Then a 3-D finite element simulation model isestablished in ANSYS to analyze the detection of RFEC technology. Finally theRFEC signals are observed when changing the geometric parameters, and thedefinite influences of crack size on the amplitude and phase lag of REFCsignals are evaluated. The results of the investigations are beneficial to thedetection and sizing of SCC in pipelines
Design and Implementation of the Network Electronic Identity Management System
Authors: Zou Xiang , Chen Bing
Published: September 2013

With the prompt evolution of Internet, network identity management is getting more and more basilica. Personal network electronic identity associated in reality has been the significant and urgent task when online life becomes real. So this paper designs the network electronic identity management system architecture, and discusses the key technology of the system implementation including electronic identity generation and verification of electronic identity, and electronic identity state transition. The network electronic identity management system also has been primary implemented and achieved good effects in actual applications.
Particle Swarm Optimization Solving Nonlinear Programming Problems in Power System
Authors: Kang Li , Li Xiao Guang
Published: September 2013

In order to improve the control capability of the power system voltage stability and to enhance spatial and temporal coordination of voltage control means, it is essential to establish the model of emergency voltage control that can globally mobilize reactive power support and voltage control potential. Focus on the long-term voltage stability of power system, the paper introduce nonlinear programming into emergency voltage control, settle the problem that how to establish the model of emergency voltage control. Based on detailed models of power system, the receding optimization model of long-term voltage stability control is established under framework of model predictive control. In order to improve the computational efficiency and reduce feedback delays, nonlinear programming sensitivity algorithm is proposed to solve receding optimization model. The proposed method can improve computational efficiency significantly which creates the condition for the emergency voltage control application to large-scale systems.
PD Control Strategy Design and Simulation of Magnetic Bearing with Single Freedom of Degree
Authors: Yang Guang , Zhang Jian Min
Published: September 2013

Based on the analysis of the model of the Single-Degree-of-Freedom (SDF) magnetic bearing system, the issue of design and simulation of PD control strategy in the system is investigated. First, the plant model of the AMB (Active Magnetic Bearings) with Single-Degree-of-Freedom (SDF) is found out to be unstable plant. Then, based on the root locus theory and Routh stability criteria, the necessity of derivation action in the controller is analyzed.In addition, the PD control strategy for a particular plant is designed, the effectiveness of which is validated by the given simulation examples. The proposed approach can provide an important reference for the practical application of PD control strategy in the magnetic bearing system.
Simulation of Vehicles Frontal Crash with Dummy Inside
Authors: Liu Yuan Peng
Published: September 2013

The complete Finite Element Model of vehicle with dummy inside is established. Through analyzing structure deformation and acceleration of the vehicle, the rule of energy absorption and dissipation is obtained, the dummys respond and the collision capability criteria of the head, chest and thigh are achieved. A comprehensive and credible appraisement about the frontal crash process and crashworthiness is proposed by analyzing the effect of the main energy-absorbing components, the transmitted route of the energy and the safety of the vehicle and occupant injury criterions.
Acousto-Optic Q-Switched Pulse Fiber Laser with the Peak Power of 9kW
Authors: Liu Yong , Lin Lin , Wang Ji , Chen Kai , Wang Guo Zheng , Liu Yang
Published: September 2013

An acousto-optic Q-switched pulse fiber laser was presented, and the output power of 20.3W was obtained by using the one-stage Ytterbium-doped double-cladding fiber amplification. The repetition frequency of the pulse fiber laser was tunable in the range of 20-60kHz. We obtained the pulse output with pulse width of 113ns, peak power of 9kW and the average power of 20.3W, when the repetition frequency was 20kHz. We also measured pulse width at different repetition rate and analyzed pulse waveform.
Research on New Techniques and Development Trend of Software Testing
Authors: Zhang Hong Chun
Published: September 2013

Some typical latest research results were summarized according to the analysis and research on the current situation of software testing both at home and abroad in this paper. On the basis of the current researches on software testing, the writer discussed the future research topic on software testing and proposed the assumption on software testings subject, industry and technique development. It laid the foundation both for further boosting the development and formation of software testing discipline system and for effectively studying on the scientific development mechanism of software testing techniques and its industry.