bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on Interactive Visualization Clustering Method Based on the Radar Chart
Authors: Li Hui Jun , Li Zhi Quan , Peng Jing Xuan , Zhang Li Hui
Published: December 2012

Most algorithms for the high-dimensional data clustering are not intuitive and the clustering results are difficult to explain. To solve these problems, a new method based on the interactive visualization technology was proposed in this paper. First, the entropy-weight was adopted to determine the main attributes and how to arrange them. Every data was described in an improved radar chart in which polar radius stood by attribute values and polar angles stood by the attribute weights. Then the points in the radar chart were clustered through applying an improved k-means algorithm. The number of clusters was not given before. And initial centers were optimized according to the point density and their distance. Finally, the experiment showed that the improved radar chart reflected the distribution of the data better and that the improved k-means algorithm was more efficient and accuracy.
A Packaging Structure with the Capability of Vibration and Sound Isolation of the Fiber Interferometer Based on the Method of Suspension Type
Authors: Dai Xing , Wang Yong Jie , Zhao Qiang , Liu Yuan Hui , Li Fang , Gao Xin , Bo Bao Xue
Published: December 2012

In this few years with the development of the application of the technique about the fiber sensing in several areas with the bad testing environment, it demands the packaging structure of the fiber interferometer, the center device in the fiber sensing system, with the remarkable capability of vibration and sound isolation. However, the performance index of the such product is still far from the requirement. Based on the method of suspension type we first produce the sound isolation device with the two-part vibration isolation structure. Then during a series of tests we find that it has the remarkable capability of vibration and sound isolation, the capability of sound isolation is higher than 40dB in the whole range of the testing frequencies and the well capability of vibration isolation, which reach to as most as 60dB and at least as 20dB, has been shown above 5Hz.
Stressed Speech Recognition Method Based on Difference Subspace Combined with Dynamic Time Warping
Authors: Lv Cheng Guo , Zhang Ru Bo , Li Pei Hua
Published: December 2012

Speech under G-force which produced when speaker was under different acceleration of gravity was analyzed and researched, considered as principal part and stressed part to research. An isolated word recognition approach was proposed which combined difference subspace means with dynamic time warping technique. The method recognized speech under G-force by constructing a difference subspace to remove the stressed part. Dynamic time warping technique was adopted to make all feature vectors of one word in the training set have equal length, and a corresponding decision criterion was suggested. For a small vocabulary including 15 words, the method obtained the average recognition rate of 98.3%, which almost equal to the rate in normal environment. The method not only worked well in normal conditions but also had good performance for speech under G-force.
Research of Intelligent Search Engine Based on Multi-Ontology
Authors: Zhang Shu Dong , Zhang Can , Wang Jing
Published: December 2012

With the development of the Semantic Web, ontology has become the primary means of expression of many fields of knowledge. Introducing the Semantic Web technology into the field of search engine is a valuable research topic. In order to meet the complex semantic retrieval demands, the paper proposes a search engine model based on multi-domain ontology, the model using ontology mapping rewrite the user query to achieve multiple ontology query, and provide a richer and accurate semantic information for the retrieval of cross-domain knowledge; And the paper proposes a method of cross-domain ontology annotation, providing a basis for the user semantic retrieval. The experimental results show that the search results improve the precision and recall rate.
Search and Rescue Robot Path Planning in Unknown Environment
Authors: Pang Tao , Ruan Xiao Gang , Wang Er Shen , Fan Rui Yuan
Published: December 2012

For the path planning problem of search and rescue robot in unknown environment, a bionic learning algorithm was proposed. The GSOM (Growing Self-organizing Map) algorithm was used to build the environment cognitive map. The heuristic search A* algorithm was used to find the global optimal path from initial state to target state. When the local environment was changed, reinforcement learning algorithm based on sensor information was used to guide the search and rescue robot behavior of local path planning. Simulation results show the method effectiveness.
Study of the Modern Information Technology and its Application in Intelligent Tourism
Authors: Yin Hong Wei
Published: December 2012

Intelligent tourism is a new field of the research for Chinese tourism industry. Seeing from the appearance to the essence, we can find it is the integration between the tourism and the information industry on the basis of making full use of the modern information technology development. This paper will describe the modern information technology and its application in tourism industry by analyzing the connotation of the intelligent tourism as well as discuss the basic structure and system of it. Besides this, the author will also put forward corresponding constructive advice and measures in the light of the reality of China’s national conditions.
A Robust and Efficient Face Recognition System Based on Luminance Distribution Using Maximum Likelihood
Authors: Hsieh Ching Tang , Hu Chia Shing
Published: December 2012

In this paper, a robust and efficient face recognition system based on luminance distribution by using maximum likelihood estimation is proposed. The distribution of luminance components of the face region is acquired and applied to maximum likelihood test for face matching. The experimental results showed that the proposed method has a high recognition rate and requires less computation time.
Real Time Dynamic Threshold Clustering Method for Ancient Chinese Character Identification
Authors: Yang Fang , Jiang Li , Si Jian Hui , Liu Cai Feng , Tian Xue Dong
Published: December 2012

Character image clustering can find similar characters which have much reference value to ancient character identification. But the classical clustering method depends much on the threshold. To alter the threshold dynamically and get result in real time, a improved clustering method is proposed. The classical BIRCH CF tree was amended to chain hierarchical structure, and the new tree was built from bottom to top with KNN clustering method. Based on this structure, relative similarity degree was transformed to character number in clustering result. By converting the dynamic threshold clustering problem to finding the different cluster range, this method could get the clustering result in real time.
Study on Auto-Search Algorithm Based on Subsection Correlation for Loran-C
Authors: Zhu Yin Bing , Cao Ke Jing , Li Bao
Published: December 2012

Auto-search is one of the key steps in digital signal processing for Loran-C receivers, however, for digital sampling Loran-C signal, the principle search algorithm is unable to realize signal search veraciously because of the asynchronism between sampling clock and transmitting station clock. For this question, an auto-search algorithm based on subsection correlation for Loran-C is presented after analyzing the principle search algorithm. The experiment results show that for the received digital Loran-C signal, there are several correlation and accumulation values of master and secondary stations to exceed the search thresholds; the maximum correlation and accumulation value of the presented algorithm is far higher than that of the principle algorithm. That is to say, the presented algorithm can search the arrival time of master and secondary station successfully, solve the problem of clock asynchronism effectively, and enhance the search sensitivity of the receiver, which have great significance for digital processing of Loran-C signal and the engineering realization of Loran-C digital receiver.
Design of WSN-Based Intelligent Light Control System
Authors: Hu Ai Na , Liu Yang
Published: December 2012

To reduce power usage and meet user satisfaction for indoor environmental condition, an intelligent light control system was analyzed. It designed sensor node and light control module to judge open the light or not and adjust the light levels according to indoor light intensity. The results show the advantage of the system based on wireless sensor network.
Research on Radio Frequency Identification Technology in Automated Press Line
Authors: Men Yu Zhuo , Yu Hai Bo , Wang Hua , Gao Jin Gang
Published: December 2012

Automated press line is a kind of very important device in the production of automobiles, and its production quality and efficiency have a direct influence on the production efficiency and quality of automobiles. Automated pressing is the effective measure and major way to increase the productivity and improve the working conditions. Some pressing workshops is taken as examples in this paper to research into the working requirements of radio frequency identification (RFID), the interference in the process of identification, the selection of RFID reader, the selection of label, device purchasing, and the connection with computers, so as to make a comparison between the moulds and manage the moulds.
Evaluation of NCM Effectiveness Base on SOM-BP Cloud Neural Networks
Authors: Zhang Guang Hui , Shi Jun Tao , Zhou Ming , Yang Hua Bing , Wang Ming
Published: December 2012

The best is to read these instructions and follow the outline of this text. The effectiveness evaluation of Network Countermeasure (NCM) is a multi-level and multi-index problem. In order to objectively and accurately evaluate the NCM effectiveness, an index system for the NCM effectiveness evaluation is set up, and a SOM-BP cloud neural network evaluation method which combined cloud theory and neural network is presented. This evaluation method has not only randomness and fuzziness of cloud theory, but also the learning and remembering ability of neural network. Using this Method to evaluate the NCM effectiveness, we find this method has the advantage of fast convergence, few iterations, and high accuracy.
Speed Sensorless Vector Control of Cascaded Inverter for Asynchronous Motor
Authors: Yang Qi , Zhang Yu Feng , Qian Shi Bao , Li Bing
Published: December 2012

According to speed sensorless vector control of Asynchronous motor for Cascaded high voltage inverter, a model reference adaptive system (MRAS) implemented in two phase rotating reference frame was studied to identify the rotor speed of an asynchronous motor. To eliminate the inherent limitations of MRAS in two phase stationary reference frame, the reference model and adjustable model used in this MRAS scheme are composed of an improved rotor flux voltage model and rotor flux current model in two phase rotating reference frame respectively. Simulation and experimental results show that the vector control system can estimate the flux and speed with good accuracy, and run with good static and dynamic performance in start, speed regulation and steady operation.
Design of Detection System for Residual Voltage Based on SOPC
Authors: Zhu Wu , Wang Yong , Jiang Chao , Zhu Jia Min
Published: December 2012

In accordance with the relevant safety standard requirements for electrical equipment, this thesis proposes a residual voltage detection method with high accuracy and low power consumption . The power frequency synchronization signal is obtained by the measuring instrument with the zero-crossing detection circuit used. In the power frequency AC peak moment the measured instrument's power is cut off and the measured equipment's residual voltage is sampled by the input circuit with the high input impedance. Under the control of the NIOSII, the on-line detection of power-down residual voltage of equipment after the 1second and 10seconds is realized with the high speed sampling /hold-circuit and high precision ADC module used. The experimental result shows that the measuring instrument has good stability, with measurement accuracy up to 0.506%, meeting the measurement requirements.
Virtual Design and Test of Manipulator’s Clamping Mechanism for Carrying Cylindrical Lithium Battery
Authors: Wang Gang , Zhang Wei Guo , Lu Zhi Yuan , Zhao Ming Yu
Published: December 2012

Designed a manipulator’s clamping mechanism for a cylindrical electric vehicle lithium battery carrying, made virtual structure design with software UG, realized the UG and ADAMS data exchange with Parasolid format, carried on virtual dynamic simulation for clamping force and contact constraint with ADAMS, virtually tested and analyzed force in coordination with kinetic parameters of clamping mechanism, finally, design of the clamping mechanism meets the requirements of large-scale battery inspection and maintenance of production lines.
Research on Statistical Process Control for Aluminium Electrolysis Reduction
Authors: Cao Dan Yang , Song Xi Zhong , Li Jin Hong
Published: December 2012

In order to lower the measurement system errors in aluminum electrolysis reduction, and find out the abnormity of process parameters, this paper considered the process parameters in the production process, used mean-range control chart in statistical process control to analyse aluminium level data during aluminium electrolysis reduction, designed and implemented the statistical process control system for aluminum electrolysis reduction data, presented process improvement method for aluminium level data. Results for the 300KA aluminium electrolysis cell show the statistical process control system can ensure the stability of aluminium electrolysis pot process parameters, find out specific reasons of abnormal data, keep the material balance and energy balance, improve current efficiency, and reduce the energy consumption.
Dynamic Modeling and Analysis of a Fruit and Vegetable Picking Robot
Authors: Wang Yan , Ge Yun Wang , Wang Xiao Li
Published: December 2012

According to characteristics of the fruit and vegetable picking operations, an articulated picking robot with four degree-of-freedom is developed. And in order to perform an expected motion of picking work, the kinematic and dynamic models have to be constructed firstly. Kinematics is established based on Denavit-Hartenberg notation. Then, the explicit expressions of dynamic models are presented through Lagrange equation. Finally, trajectory planning from one point to another point is carried out with cycloidal motion, and the angular displacement, velocity, acceleration and torque curves of each joint are analyzed. Simulation results show that the torque curves are quite smooth and with no abrupt changes, which indicates that the motions of each joint won’t result vibrations and can ensure stability of the robot system.
PID Control of Double-Loop Speed Control System Based on Bacteria-Particle Swarm Hybrid Optimization Algorithm
Authors: Cheng Tao , Lin Wei Xing , Li Wen Lei
Published: December 2012

In order to improve the performance of dual-loop speed control system and overcome the defect of the traditional PID controller parameter tuning, a hybrid algorithm(BF-PSO) of Bacterial Foraging Optimization (BFO) algorithm and Particle Swarm Optimization(PSO) algorithm is proposed in this paper, and applied to PID parameter tuning of the double-loop speed control system. This algorithm combines the fast convergence characteristics of PSO and strong global search ability of BFO. Compared with the simulation results of the PSO and BFO, BF-PSO has better speed tracking performance, and higher convergence speed and robustness.
A Numerical Controlled Constant Current Source Based on Power MOSFET
Authors: Wang Kai , Gao Yuan , Fan Yu
Published: December 2012

Supercapacitor is widely used in high power energy storage device, and its charge and discharge properties decide the energy storage devices of important performance indicators. In this paper, in order to research the charging performance of supercapacitors, a constant current test system which is based on microcontroller was designed. The system use a program-controlled constant current source which focuses on high-power MOSFET in accordance with the current data gotten from the sampling circuit, adjust the output current by PID algorithm, and thereby enhance the controlling precision of the output of the constant current. Under the combined control between upper machine and lower machine, the test system can map out potential function curve following time-varying, so that the supercapacitor’s charge process implement visualization. The result which tests the supercapacitor shows that the circuit has a simple structure and the current is very stable, which can be applied to all kinds of energy storage device which requires high current for charge and property test.
Research on Improved Power Harmonic Current Detection Methods
Authors: Wang Jin Yu , Shen Zhi Hui , Zhou Yu Long , Zhang Pei Jiang
Published: December 2012

Although Active Power Filter can achieve good filtering effect and accurately compensate harmonic current, it dependents on the proposed current detection algorithm. The paper first discusses the method which is based on transient reactive power theory; the detection method is based on coordinate transformation. After the coordinate transformation is analyzed, the paper advances an harmonic method, this method can remove three-phase to two-phase and two-phase to three-phase coordinate transformation, and effectively reduce the computation, improve the detection speed. At last, the feasibility and validity of the new algorithm have been showed by MATLAB simulation
The Design and Application of PLC Master-Slave Control System Based on MPI
Authors: He Jian Zhong , Zhao Zi Xian , Zhong Zhao Nan
Published: December 2012

In the industrial control system, the communication framework of the master-slave mode is usually set up according to the general requirement of the control system. This paper mainly introduces the design and implementation of the PLC master-slave mode control system, using the MPI communication mode to realize data transmission between the master station and slave station, so as to realize the requirement of control system.
A Non-Contact Speech Enhancement Algorithm Based on Wavelet Packet Adaptive Threshold
Authors: Xue Hui Jun , Li Sheng , Jiao Teng , Lu Guo Hua , Zhang Yang , Wang Jian Qi , Jing Xi Jing
Published: December 2012

Speech is an important method for human communication. In this paper, we developed a new method for detecting speech signal. Because of the advantage of this speech detecting method, it has great potential application value in many fields. Simultaneously, basing on the good capability of wavelet packet for analyzing time-frequency signal, this paper also developed an algorithm of wavelet packet threshold by using hard threshold and soft threshold for removing noise. Comparing to spectral subtraction and Wiener filter speech enhancement algorithm, the proposed algorithm takes on a better performance on noise removing and speech signal reserving.
Fuzzy Control Strategy of Powershift Transmission of Tractor
Authors: Xi Zhi Qiang , Zhou Zhi Li , Li Yan
Published: December 2012

Due to the complex working conditions of tractor and its frequent load fluctuation, it is difficult to analyze shift schedule through the traditional approach of building the mathematical model of power train. The paper will applied fuzzy control theory to the shift schedule. The control rules is determined based on the different operating states of tractor. Slip rate which is a important indicator to reflect tractor operation will be introduced as control parameters to research the control strategy of tractor’s powershift antomatic transmisson. The simulation result shows that the method can effectively avoid shift circulation and reduce the shift frequency, which improve the dynamic performance and fuel economy of tractors.
A Research on Impact Compensation Control Strategy of Electric Power Steering System Based on Whole Vehicle Dynamics
Authors: Tan Guang Xing , Song Yang , Lin Chuan , Jian Wen Guo
Published: December 2012

In order to improve the vehicles steering performance, based on a whole vehicle dynamics model，the electric power steering system(EPS) control strategy is studied under road surface impact condition. An AIS controller is executed on the output current of assist motor hence further improving control effects. Accompanied the methodology of combining the full vehicle model in CarSim and EPS model in MATLAB, this co-simulation model is verified by test data. By comparison yaw rate and slip angle of the results show that: implementing the control of EPS by AIS compensation strategy is an effective way of enhancing the capability of steering and the stability of operation, which can make it more accurate and flexible.
Influence of Suspension Nonlinear Hysteretic Characteristic on Handling Performance
Authors: Ji Peng , Jia Hui Jun , Feng Shuang Sheng
Published: December 2012

Suspension stiffness is influenced by the nonlinear hysteretic characteristic, which has effect on vehicle handling performance. In this paper, the effect of suspension nonlinear hysteretic characteristic is analyzed and described and the effect of characteristic on suspension stiffness and handling performance is indicated by simulating results. Due to suspension stiffness is smaller than nominal stiffness with suspension travel which described by nonlinear hysteretic characteristic model, handling performance is obtained accurately.
Research on the Control System of Car’S Power Supply
Authors: Fan Kuan Gang , Qiao Hong , Jia Wen Yong , Sheng Ying Fei
Published: December 2012

There are different voltages in car electrical parts, and power switches are achieved by pushing. Electromagnetic radiation which is caused by switches has a great effect on the test components and close power. The voltage caused by Electromagnetic interference could be up to 20V. Controlling panel is established by LabView and power is controlled by Matlab. The test of Car electrical parts is achieved by power. Power output is controlled by panel. Wavelet analysis is used for graphics. Collecting data is more reliable through the BP Network. The error is reduced by 30%. Amplification circuit, anti-mixing and interference circuit and triode switching circuit are designed for remote controlling power and reducing electromagnetic radiation. It raises anti-interference ability. Electromagnetic radiation is mainly focused on 0-60MHz from experiments. According to this frequency brand, we adopted measures for reducing electromagnetic radiation by 8.6dB.
Design of Protection Functions Test System for Intelligent Low Voltage Electrical Apparatus Based on Flexible Test Technology
Authors: Xu Wei , Xie Qi , Xu Hui Gang
Published: December 2012

In order to satisfy the needs of protection functions test for intelligent low voltage electrical apparatus, based on the introduction of features of the flexible test technology, a design of protection functions test system for intelligent low voltage electrical apparatus based on the flexible test technology was proposed in this paper. The test system was made up of the hardware composed of industrial computer, multifunction data acquisition card, three phase current generator, three phase voltage generator, etc, and the software developed by LabVIEW. The design idea and the test flow of the software were also introduced in detail. Finally, the application example shows that the protection functions for intelligent low voltage electrical apparatus constructed based on flexible test technology could carry out a high efficient, automatic, accurate test, which fully reflected the three characteristics of the flexible test technology ——flexibility, adaptability and expandability. Therefore, the test system has great practical value and application prospect.
Design of Integrated Monitoring System for Electric Vehicle Charging Station Based on Weblogic
Authors: Li Hao , Sun Guang Ming , Chu Yi
Published: December 2012

Dispersion characteristics for AC charging pile distribution and monitoring of electric vehicles in mobile state, it proposes a communication method with the server by centralized GPRS module and Electric Vehicle Terminal (EVT). In order to meet the design requirements of the comprehensive monitoring system for remote access, system uses Struts, Spring and Hibernate framework based on Browser/Server (B/S). Network servers use weblogic cluster together with the Oracle database server and Coherence real-time database to meet the high number of concurrent users. Client pages are based on the full-featured ExtJs library with beautiful interface. The system consists of five functional modules, which are structured and closed contact with each other. Test results show that the system is stable and the average response time is short.
Research on Simulation of Maritime Macroscopic Traffic Safety
Authors: Yang Jia Xuan , Wang Qing Wu
Published: December 2012

In order to evaluate the ship traffic safety about the large water area, the system of maritime macroscopic traffic safety was developed, which can give the simulation result under the setting conditions, using the electronic chart display and information system conform to S57 and S52. The simulation model of ship traffic flow is proposed, which play an important part in the system. The outcome can be provided according to the assessment method of maritime safety, and displayed on the ECDIS. With the clicking on the icons by the mouse button, the information about the simulation can be offered.
Research on the Real-Time Prediction Model of the Traffic Flow Based on Wavelet Neural Network
Authors: Wen Hui Ying , Yang Gui Feng , Wu Wei Tiao
Published: December 2012

Real-time traffic flow prediction is the core of traffic control and management, which is the basis of traffic safety in mountain area. Traffic flow, which is highly time-relevant, with the features of high non-linear and non-determinism, can be treated as the time sequence forecast. Considering these features, this paper deals specially with this issue based on Wavelet neural network. Besides, by taking a road in mountain area for example, the paper realizes the analog simulation through the Matlab software programming. And the simulation results show that the traffic flow can be precisely forecast using Wavelet neural network, and its value is close to the expectations. The MAE of the Wavelet neural network is 20.1074 and the MSE is 2.5254.
A Comprehensive Multi-Mode Traffic Information Service Platform for Pedestrian and Bicycle Traffic
Authors: Qu Zi Hui , Qi Chen , Zhang Hua Qiang
Published: December 2012

Slow traffic accounts for a great part of urban transportation, and is drawn more and more attention. However, the service system for this kind of traffic is rather inadequate, which seriously hampers the construction of smart city and digital urban. In this paper, beginning with the characteristics of slow travel persons, we design a multi-mode traffic information service platform for pedestrians and bicycle system specially. In our platform, non-interactive facilities for slow traffic are designed and deployed oriented pedestrians and cyclists. To provide customized information meeting pedestrians’ various demands and allow users’ feedback, the interactive service platform based intelligent mobile terminals and mobile internet is introduced instead of current electronic inquire equipments settled in public.
To the Question of Parametrical Dynamic Three-Dimension Model Design of the Automated Power Generating Complex Mixer
Authors: Zhukov Ivan , Varnava Alexander , Knyazev Anton , Nagibin Anton
Published: December 2012

The article expounds the design technique of parametrical three-dimension model of the mixer which is a part of the automated power generating complex, used for coal-water fuel preparation. The possibility of the kinematic characteristics analysis of the mixer on the basis of engineering calculations in T-Flex CAD is shown.
Study on Collaborative Design for Distribution Engineering Based on CAD and Knowledge Management
Authors: Liu Yong Qing , Cai Jin Ding
Published: December 2012

In construction of CSCD system for distribution engineering, there existed two main problems: the design security control, the call speed and reuse efficiency of CAD drawings. This paper has designed the electronic signature and the electronic seal, the decision program of validity of CAD files to solve the security problem after the risks in their circulating process were analyzed. Furthermore, the three-layer distribution network topological structure, the Classified and layered storage methods, the smart client and the knowledge push methods of CAD files have been developed to increase the call speed and reuse efficiency. The technical methods have been verified feasible in the practical operation of FJCD system.
Research and Development of Complex Curved Surface Mechanism Parts Based on Network CAD/CAM/DNC
Authors: Wang Qi Bing , Gu Ya Jie , An Dong Qing
Published: December 2012

In order to accelerate the efficiency of research and development for new products and in light of the current numerous CAD, CAM softwares and the practical situations of CNC machine tools, etc. in our Center, CAD/CAM/DNC integration & networked platform is established and the respective advantages of softwares are utilized so as to realize the research and development of complex curved surface mechanism parts. The method tactfully utilizes the advantages of current powerful popular softwares and, through their powerful cooperation and respective functions, completes the research and development of complex curved surface mechanism parts based on network CAD/CAM/DNC, significantly improving the efficiency of research and development for new products.
Research of CMTS Based on Passive Optical Network
Authors: Liu Xiao Li
Published: December 2012

This paper presents the implementation of CMTS (Cable Modem Termination System) with PON (Passive Optical Network) technology to transfer IP data in HFC (Hybrid Fiber-Coax) network. By describing the theoretical basis and main function of each module, we introduce work principle of this device: converted the format of data transmitting in HFC network so that it can transfer in IP network, then achieved the aggregation of IP data to transport layer device by PON technology. The results show that the SNR is high and the bandwidth achieves expected value, so this design scheme is feasible.
The Key Issues to the Switch of the Multi-Channel Video Signal
Authors: Wu Yao , Liu Nan , Ren Xiao Jun
Published: December 2012

This paper proposes a multi-channel video signal switch system. The authors introduce a key technology which uses AD8108/AD8109 as switching devices, micro-controller LPC2214ARM as the control unit to form a multi-channel video switch. Firstly, this paper analyzes the working principle of AD8108/AD8109 and LPC2214. Then the authors give the hardware structure of the multi-channel video switch system, and the software design of the system. Finally, this paper puts forward the key issues to the switch of the multi-channel video signal after experiments. Facts have shown that these factors must be taken into account in the design of successful video signal switch systems.
The Embedded System of Forest Resource Information Acquisition Based on OMAP3530
Authors: Liu Ying , Zhu Yan Tao , Li Yu Rong , Ni Chao
Published: December 2012

With the development of information technology, the concept of “Digital Forestry” is put forward. To improve the level of forestry information management, 3S technology is used in forestry. Therefore the embedded system of forest resource information acquisition has designed which integrated embedded technology with GIS, 3G wireless communication technology and GPS. Specifically, the requirement of forestry resource survey has been analyzed, the whole structure has been established and the system has been developed by using the advanced demo-board OMAP3530.The embedded system can realize six functions including system login, data acquisition, data management, map operation, GPS positioning and navigation, temperature and humidity measuring. It can enhance working efficiency, reduce power consumption and get real-time data. The embedded system of forest resource information acquisition has been verified in Lianyungang Xinpu district forest, which gives a good guide to forestry management.
Multistage MMIC Power Amplifier Automatic Testing System
Authors: Ouyang Si Hua , Peng Ming Zeng , Wu Jin , Li Yan Kui , Liu Xin Yu
Published: December 2012

Based on GaN HEMT the monolithic microwave power amplifier (MMIC) with great advantages of high operating voltage, high output power, wide frequency bandwidth and small features loss has been widely used in phased-array radar, aerospace, missile interception system. However, MMIC test has many disadvantages, such as, including many microwave instruments, test process is complex, manual operate lots of instruments, and write down test data, result in slowed down test process. In the paper, it introduces a new system by ourselves. This can simplify the MMIC test process, and free ourselves from heavy test task, and focus the performance of circuit. It realizes the automatic test and proves it using a based on GaN HEMT 2×4 MMIC circuit.
The Research and Design of Instrument Management System Based on Wireless HART Technology
Authors: Pan Cao , Ding Hui , Wang Hong Yuan
Published: December 2012

This paper presents a design of instrument management systems based on the wireless HART communications technology. The whole system achieves data of intelligent HART instrumentation uploading and setting through the wireless HART communication network. Data server software parses the data according to the wireless HART data frame format, and saves data through the real-time historical database of SCADA software Force Control 6.1. Application server provides a visual user interface, completes the configuration and monitoring for the field intelligent instrument and operates easily. This system has the scalability, reconfigurability, and other characteristics and it has a certain application value on the HART intelligent instruments of information management.
A Real Time Video Transmission Routing Protocol in Multi-Interface Multi-Channel Ad Hoc Based on Queue Length and Delay Contraint
Authors: Song Ling , Li Tao Shen , Chen Yan
Published: December 2012

Real-time video transmission demands tremendous bandwidth, throughput and strict delay. For transmitting real-time video in the multi-interface multi-channel Ad hoc, firstly, we applied multi-interface multi-channel extension methods to the AOMDV (Ad-hoc On-demand Multipath Distance Vector) routing protocol, and improved extant channel switching algorithm, called MIMC-AOMDV (Multi-Interface Multi-Channel AOMDV) routing protocol. Secondly, we proposed video streaming delay QoS(Quality of Service) constraint and link-quality metrics, which used the multi interface queue’s total used length to get QMMIMC-AOMDV (Quality metric MIMC -AOMDV) routing protocol. The simulations show that the proposed QMMIMC-AOMDV can reduce the frame delay effectively and raise frame decodable rate and peak signal to noise ratio (PSNR), it is more suitable for real-time video streams.
Minimum Interference in UWB and WiFi Networks
Authors: Wu Hua Yi , Li Wei , Bai Bao Hua , Sun Pei , Shen Zhi Dong
Published: December 2012

Due to the key property of UWB communications: short transmission range, the communication between different UWB devices sometimes needs the help of relay devices. We studied a hybrid wireless network including UWB devices and WiFi devices together. We analyzed the interference of the network and introduced a new reasonable interference definition in the hybrid environment. We proposed an optimal algorithm to reduce the interference of network. Extensive simulations have been conducted to evaluate the performance of the proposed algorithms. The simulation results show that the new proposed algorithm make the interference of the network minimum and improve the throughput of the network.
TDMA-Based Time Slots Assignment Algorithm
Authors: Lu Jun , An De Zhi
Published: December 2012

In this paper we studied timeliness of TDMA-based MAC scheduling mechanisms. TDMA-based MAC protocols require sensor nodes to deliver data individually so as to eliminate collisions in shared channel. This scheduling mechanism can assist sensor nodes in managing energy efficiently since data resending that collisions induced has a significant impact on battery life. But during medium access arbitration, the elected central node has to receive other nodes’ state messages one by one before assigning time slots for each node. While in large-scale sensor networks, the waiting time would be a relatively long duration and result in timeliness decrease in time-sensitive environments. We propose a novel time slots assignment algorithm for TDMA-based MAC protocols that allows sensor nodes to deliver state messages simultaneously to central node for medium access arbitration and present an analysis in which these two approaches are compared in respect to timeliness. The algorithm is evaluated through simulation. Simulation results have confirmed the timeliness of our new algorithm.
The Research of Network Public Opinion Hotspots Technologies for Internet Web
Authors: Zhao Ji Chun , Guo Jian Xin
Published: December 2012

Network public opinion analysis, which is through the analysis of the situation of public opinion, can reflect the true society and public opinion, and on this basis, a reasonable forecast and recommendations decision-making can be provided for relevant managers. The paper studies on agricultural science and technology related website, and realize internet public opinion analysis for agriculture science and technology site. The network public opinion hotspots found technology is studied. It is achieved internet public opinion hotspots monitoring and found through the network information automatically grab and information classification. It is provided an analytical basis for managers to grasp the ideological trends in the network and make the correct guidance.
Research on Performance of Unidirectional Links Routing Protocal With Different Mobility Models
Authors: Sun Wei Zhen , Zhang Qin Zhen
Published: December 2012

In the Mobile ad hoc network, most routing protocols assume that all wireless links are bidirectional, but such assumptions may lead to sub-optimal performance in conditions of non-uniform transmit power and non-uniform background noise. We present a scheme improved from Ad Hoc Ondemand Distance Vector (AODV), which computes routing path using backup routing table and Backtrack Route Reply mechanism when subjected to unidirectional links. Each node maintains a backup path to the source node, and when the backup path is unavailable, the node will backtrack to last hop to find the alternative path to the source. Compared to basic AODV and AODV-Blacklist schemes, simulation results show that the more unidirectional links exist the better the proposed scheme performs, and under different mobility models, the performances metric are significant difference.
Architecture of Mobile Payment System with Tolerate Mechanism
Authors: Zhao Jin Hui , Yin Li Jie , Xiong Li Li , Qian Xu
Published: December 2012

A good architecture is the basis of system security and stable operation, which can effectively reduce the risk of system construction, and ensure health development. The mobile payment system involves many links; the process is complex and diverse with higher security requirements. Combined with advanced security technology --- tolerance mechanisms, a novel mobile payment system architecture is design. Voting unit and detection unit checks the states of system; management unit restores or reconstructs system to ensure the operation of key services by redundancy of services and equipments; Threshold (n, t) multiplies the difficulty of the attack proxy server to gain access to sensitive information. According to security and performance analysis, proposed architecture is safe and effective.
Design and Implementation of Mine-Map Management Information System Based on B/S Model
Authors: He Hu Jun , Yan Yu Mei , Li Wan Ling , Zhao Ya Ning
Published: December 2012

Analyzing the existing problems of traditional management model of mine-map and the development significance of mine-map management information system on the basis of B/S model, combining with the actual situation of mining enterprises, this paper designs mine-map management information system on the basis of B/S model using ASP technology, backend database system using Microsoft SQL Server 2000 simplified enterprise edition. The system mainly consists of four main modules such as interface module, system setting module, task assigned module, maps consulting modules, the task of each module is definitude, the function is independent. Field application shows that the system realizes line production of mine-map management, such as submission, examination and approval, storage and consulting etc, enhances the efficiency of examination and approval and management for mine-map.
SAR Image Registration Using Ratio Mutual Information
Authors: Wei Chun Rong , He Chu , Sun Hong
Published: December 2012

In order to reduce the noise sensitivity of the SAR (synthetic aperture radar) image registration, a image registration algorithm which basing on the ratio mutual information (RatioMI) is proposed in this paper. Firstly, the ratio images of the reference image and the floating image are gotten by using the ratio operator, and then take the two ratio images as a similar characteristic quantity to construct the similarity measure function which was used in the optimization process of the image registration experiment. The experimental results of the SAR image registration show that the new registration algorithm which based on the RatioMI is effectively in avoiding the local maxima point problems causing by speckle noise.
A Kind of Virtual Instrument Based Data Acquisition for Vehicle Test
Authors: Liu Kai , Wang Li Rong
Published: December 2012

A data acquisition platform for vehicle test is presented by combining virtual instrumentation technology with graphical programming environment of LabVIEW. Multiple modular instrumentations are employed for capturing different kinds of data from electronic transducers and CAN bus in synchronization. LabVIEW based software adopts QSM-PC (Queued State Machine Producer Consumer) architecture, which can perform functions of multi-channel, real-time data acquisition, processing, storage, and readback. The presented platform, taking advantages of high integratability and great scalability, is verified by real-vehicle experiments.
Research on Software Fault Diagnosis System Based on Multi-Agent Architecture
Authors: Chen Guo Shun , Niu Gang
Published: December 2012

Software faults are the underlying and important roots which result in the mistake, failure and even breakdown of system. Therefore, the software fault diagnosis is a challenging problem and fault diagnosis technique is very significant to software quality assurance. Multi-Agent have autonomy, intelligence and social ability, which is well-suited for diagnosing software systems, and which can easily be integrated with existing software fault diagnosis schemes. In this paper we describe a novel architecture based on Multi-Agent for software fault diagnosis. We implement a software diagnosis based on this architecture and demonstrate its high diagnostic accuracy and effectiveness in an experiment with realistic software intensive equipment.
The Construction of Intelligent Recording and Broadcasting System of Streaming Media Courseware
Authors: Wang Jun Feng
Published: December 2012

This paper analyzes the classification of intelligent recording and broadcasting system, mainly introduced how to construct an recording and broadcasting system, and put forward how to use streaming media courseware intelligently copy , broadcast and make teaching video to express the high efficiency, under the background of current network environment has increasingly become mature .
JSSlicer: A Static Program Slicing Tool for JavaScript
Authors: Wang Li Ming , Xian Ying , Zhang Li , Liu Xi Yang
Published: December 2012

The rapid development of Web 2.0 leads scripting language such as JavaScript to be ubiquitous in web pages; however the dynamic nature and flexibility of JavaScript make its development, debugging, maintenance, and reuse difficult. To improve the efficiency and accuracy of JavaSript security analysis, we propose a new JavaScript analysis method based on program slicing, together with a prototype-implemented JavaScript slicing tool, named JSSlicer. We also present a proof-of-concept application example of JSSlicer where an example of the common mode failure problem is tackled.
Two-Level Secret Key Image Encryption Method Based on Piecewise Linear Map and Logistic Map
Authors: Zhang Yong
Published: December 2012

Some chaos-based image encryption schemes using plain-images independent secret code streams have weak encryption security and are vulnerable to chosen plaintext and chosen cipher-text attacks. This paper proposed a two-level secret key image encryption method, where the first-level secret key is the private symmetric secret key, and the second-level secret key is derived from both the first-level secret key and the plain image by iterating piecewise linear map and Logistic map. Even though the first-level key is identical, the different plain images will produce different second-level secret keys and different secret code streams. The results show that the proposed has high encryption speed, and also can effectively resist chosen/known plaintext attacks.
Scheme of Mapping from XML Document to Relational Database
Authors: Huang Shu Qin
Published: December 2012

A new algorithm and a mapping scheme between XML document and relational database were presented. The scheme extracted name, type, value and other information from XML document, and then mapped them to relational database. Data from relational database can be restored to XML document. This method avoids information loss in the data transfer process and remains the structural relation between elements. And this mapping scheme does not depend on XML DTD or Schema.
An Improved J-M Software Reliability Growth Model
Authors: Liu Yan Zhao , Luo Xun , Ao Jian Xun , Xue Kai , Luo Ping
Published: December 2012

Reliability is an important software trustworthy attribute. But most existent reliability model don’t consider the severity degree of software fault, so traditional software reliability model can’t reflect the trustworthiness of software. Based on the analysis of typical J-M reliability growth model, this paper modifies some of the model assumptions and classifies the software faults. Besides, this paper presents a new method based on weight to calculate the degree of software reliability. Finally, according to the different of frequency of software faults, a practical reliability prediction method is proposed and the experiment results shows that the improved model has a better forecast accuracy.