Table of Content

15 December 2011 Volume 24 Issue 12
    Edge Detection of Real-Time Image Based on FPGA
    LIU Zi-Yan
    . 2011, 24(12):  1. 
    Abstract ( 1307 )   PDF (1003KB) ( 951 )  
    References | Related Articles | Metrics

    The traditional Sobel algorithm for edge detection is based on static image,and it is difficult to carry out in the process of real-time image processing.We design an edge detection system of real-time image based on FPGA,which can implement the edge detection dynamically,and has high detection accuracy and efficiency.

    Recognition Method for the License Plate Character and Discriminant Function Based on the Template Matching
    GU Qiu-Di, BAI Yan-Ping
    . 2011, 24(12):  4. 
    Abstract ( 1581 )   PDF (599KB) ( 1157 )  
    Related Articles | Metrics

    This paper does the“and” operation for the pre-designed template standard of license plate character and the character to be recognized.It puts forward two discriminant functions,calculates the minimum of standard deviation of the template,the character to be recognized and the matching result,calculates the maximum sum of the matrix elements of the matching result,and makes an analysis of their results.Then it uses them together.The results show that it has better result than the previous method in recognition of some characters.

    Standard Letter Parametrization Method in Several CAD Environments
    GUO Jing-Jing, DU Bao-Jiang, MA Qun, WEI Xiong
    . 2011, 24(12):  7. 
    Abstract ( 1068 )   PDF (489KB) ( 784 )  
    References | Related Articles | Metrics

    This article analyzes the limitation of the method of establishing standard letter storehouse with commonly used CAD softwares,proposes a method for establishing the standard letter storehouse in several CAD environments.This method takes Visual Basic as the development language to compile the corresponding procedure,parameterizes the standard letter model document in different environments thought the parameter information transferred by the internet from the public information database,and realizes the establishment of the standard storehouse.

    Research on Classification of Tilletia Diseases Based on BP Network
    LI Min, DENG Ji-Zhong, YUAN Zhi-Bao, HUANG Hua-Sheng, WANG Zhang
    . 2011, 24(12):  10. 
    Abstract ( 1190 )   PDF (541KB) ( 763 )  
    References | Related Articles | Metrics

    Application of the techniques of image analysis and pattern recognition to the sorted diagnose of Tilletia disease is of significance to improving the automation of detecting the diseases of entry-exit plants.After an analysis of the shapes and texture features of the spore images of Tilletia caries (DC.) Tul.,Tilletia indica Mitra and Tilletia controversa Kühn,this paper selects six typical features including major axis,minor axis,minor axis of equivalent ellipse,area,perimeter and moment of inertia to describe the spore region.Next,a classifier for wheat disease based on the BP neural network consisting of 6 input vectors and 4 output vectors is designed for the classification of the three diseases' images.The primary tests,in which the accuracy of recognition accuracy towards 33 samples is up to 81.8%,shows high accuracy and capability of the classification of the three diseases.

    Research on and Design of the IVR System Based on Asterisk
    PAN Rui, LI Guang-Lin, LUO Wei-Bing
    . 2011, 24(12):  13. 
    Abstract ( 1208 )   PDF (498KB) ( 785 )  
    References | Related Articles | Metrics

    The IVR (Interactive Voice Response) system is a powerful automatic phone system which provides a service system for clients on the menu navigation function.It is also an important part of the call center to control the business process.The Asterisk is the open source software which is launched by Digium.The paper introduces the Asterisk platform and designs a framework of the IVR system.By designing the process of service and the module of Callback,and analyzing them,we can improve the service efficiency of the IVR system.

    Design and Realization of ADSL Connection Management System Based on UML
    LIU Fang
    . 2011, 24(12):  16. 
    Abstract ( 1668 )   PDF (487KB) ( 770 )  
    References | Related Articles | Metrics

    ADSL Connection Management treating flow is introduced.The ADSL Connection Management System is taken as an object of study and a visualizing modeling tool named unified modeling language (UML) is introduced,which abstracts the web class that helps fast exploration with high efficiency and low cost.By utilizing UML,the realization of the system is analyzed from the aspect of demand and static and dynamic models are established.Use case diagram,class diagram,sequence diagram and activity diagram of the system are drew by using microsoft office visio.Finally the ADSL Connection Management System is developed.The system has the advantages of security,high efficiency,great feasibility and strong popularization and expandability.

    Examination Arrangement Information System Based on UML Modeling Technology
    XUE Yuan
    . 2011, 24(12):  19. 
    Abstract ( 1279 )   PDF (511KB) ( 787 )  
    References | Related Articles | Metrics

    The use of computers to achieve examination arrangement,simplifies operation and improves the efficiency of educational administration.The application,the analysis and the design flow between adjacent phases during the accomplishment of main tasks in each phase are discussed and solved particularly in the paper.The applications sequence of class diagram and sequence diagram in the system design are discussed.UML facilitates communication between people and improves the efficiency of system modeling.

    Study on Video Stream Bit Division
    ZHOU Han, YU Wen-Bin
    . 2011, 24(12):  22. 
    Abstract ( 1049 )   PDF (443KB) ( 775 )  
    References | Related Articles | Metrics

    A bit based video stream division scheme is proposed.The video series is cataloged on the basis of importance and location of the information in the video stream.The cataloged information is transmitted by unequal error protection.The simulation results shows that the proposed scheme can obtain better performance than the traditional video division scheme.

    Target Tracking Algorithm Based on Mutual Information and Adaptive Template Update
    LI Qiong, WANG Jun-Ning
    . 2011, 24(12):  25. 
    Abstract ( 1621 )   PDF (1205KB) ( 1949 )  
    References | Related Articles | Metrics

    Image tracking algorithm based on normalized mutual information,which has good stability when the target is rotated,occluded or the illumination condition is changed.However,in a practical tracking system,algorithm is also required to adapt to change in the appearance of moving objects in real-time.With this in mind,on the basis of the research of normalized mutual information tracking algorithm,a new adaptive template size update strategy was introduced in this paper.The strategy is the measure based on information of multi-scale image in scale space.Experimental results demonstrate that the template can be modified adaptively when the target size is changed.And stability and adaptability of the improved tracking algorithm has greatly improved.

    Design of the Electric Power Load Management System Based on ARM9
    MA Xiao-Li, NAN Quan
    . 2011, 24(12):  30. 
    Abstract ( 1516 )   PDF (550KB) ( 782 )  
    References | Related Articles | Metrics

    This paper introduces the Electric Power Load Management Terminals system which adopt the operating systems of ARM9 and Linux and the design of the system.The Electric Power Load Management Terminals have strong and steady application software depending on the Linux system.By the technique criterion Q/GDW 374.1-2009,the tasks of the smart electric network management terminals are resolved into several threads of the executive tasks under application softwares,thus improving the capability and stability with which the system implements multi-tasks.

    Design of a Base Station Antenna with Broadband and High Isolation
    LI Peng-Jie, HOU Jian-Qiang, HAN Ri-Xia, ZHANG Jin-Feng, LU Zhi-Yuan
    . 2011, 24(12):  33. 
    Abstract ( 1810 )   PDF (406KB) ( 706 )  
    References | Related Articles | Metrics

    A broadband high isolation dual-polarized dipole antenna element is presented.Which is suitable for the base station antenna.The parameters of the antenna are simulated and analysed by the EM simulation software HFSS.The VSWR is below 1.35 with the frequency range between 698 and 960 MHz.The port isolation is greater than 41 dB.And the antenna has a perfect miniaturization characteristics.This design provides a useful way for the design of the low-frequency-band broadband Mobile communication base station antenna.

    Verification of I2C Bus Model Using SystemVerilog
    YAN Tao, SHEN Zhi-Fei, YI Mao-Xiang, MEI Chun-Lei
    . 2011, 24(12):  35. 
    Abstract ( 1463 )   PDF (594KB) ( 702 )  
    References | Related Articles | Metrics

    A design for IP verification of I2C bus module based on  Systemverilog is introduced.The verification design based on the object-oriented method can be easily reused.The structure of Systemverilog is analyzed and I2C bus protocol is introduced.After that,the paper focuses on the design of the affair generator and drive in the verification environment.

    Design of 4~8 GHz Broadband Monolithic Low Noise Amplifier
    YU Han-Yang, CHEN Liang-Yue, LI Xin, YANG Tao, GAO Huai
    . 2011, 24(12):  38. 
    Abstract ( 1203 )   PDF (657KB) ( 735 )  
    References | Related Articles | Metrics

    A C-Band broadband monolithic low noise amplifier is designed based on 0.15 μm GaAs PHEMT process.The circuit is formed by cascading three stages of amplifiers.To solve the problem of complex power supply,each of the stage uses a self-biased resistance to achieve a single power supply.It not only ensures PHEMT to work at an optimum operation point with low noise and high gain,but integrates all components (including the bias circuit) in a monolithic GaAs substrate also.A parallel negative feedback structure is used in the third stage of the circuit to reduce gain of the low-frequency band and raise gain of the high-frequency band,which improves the gain flatness of the amplifier.Results from simulation based on AWR Microwave Office show that the designed LNA has a noise figure(NF) below 1.4 dB,a power gain of 23 dB,a gain flatness of less than ±0.5 dB and input and output VSWR of less than 2.0 over the frequency range of 4~8 GHz.

    FPGA-based High-speed Data Acquisition and Transmission of Voice Logging System
    YANG Yong-Xia, LI Ya-Wei
    . 2011, 24(12):  42. 
    Abstract ( 1070 )   PDF (707KB) ( 746 )  
    References | Related Articles | Metrics

    In view of the fact that in logging in the signal transmission speed is low and that the operation is complicated,this paper presents a new method for high-speed data acquisition and transfer.The newly designed system uses the high-speed AD converter.It uses a flexible,cost-efficient FPGA chip,EP1C6,as a platform and uses USB transfer to achieve a sound piece logging system based on Verilog.In the end,the sound amplitude obtained from the host computer is used to determine the quality of cementing.If the cement bond is good,the cementing sound amplitude log value is low;for poor cement bond,the cementing sound amplitude log value is high.

    A Novel Broadband U-shaped Slot Microstrip Antenna
    LI He-Yan, LI Ping
    . 2011, 24(12):  47. 
    Abstract ( 1205 )   PDF (347KB) ( 731 )  
    References | Related Articles | Metrics

    A new low-profile broadband microstrip antenna with slots is presented.U-slot loading technique is used to produce a new resonance point and broaden the impedance bandwidth.The antenna characteristics are analyzed and optimized numerically with Ansoft HFSS,and the simulation results show that there are two resonant frequencies of 12.83 GHz and 15.06 GHz.The relative bandwidth for |S11|<-10 dB can reach up to 940 MHz and 770 MHz.

    Research on the Aeronautical Static Inverter
    WANG Bang-Ting, ZHENG Jian
    . 2011, 24(12):  47. 
    Abstract ( 918 )   PDF (485KB) ( 707 )  
    References | Related Articles | Metrics

    Static Inverter is a key component of aircraft electrical power system (EPS).It is not only associated with the flight safety,but also a key element which affects the technology level of aircraft EPS.This paper focuses on the research on the realization methodology of the static inverter,and presents a double Buck inverter topology for the static inverter.A single phase double Buck circuit topology is used,which can eliminate the short circuit in one side of bridge.The diode attached to the switching device will not be involved in the operation.Therefore,there will be no large power loss of the switching device.The efficiency and reliability of the static inverter will be higher.The presented topology for the static inverter has been verified by simulation results.

    Design and Study of Low Voltage High-Efficient Microwave Amplifier
    LUO Qian
    . 2011, 24(12):  50. 
    Abstract ( 1343 )   PDF (568KB) ( 838 )  
    References | Related Articles | Metrics

    This paper introduces a method applied to low voltage microwave dual polarity transistor amplifier.Through the analysis of equivalent circuit model,it compares the output power,efficiency and linearity of using load-pull,small signal and the method proposed in this paper,and designs an amplifier to prove it.The three different matching methods are compared.Simulation results show that the proposed method improves the output power,efficiency and linearity.

    Research on the Serial Communication Technology for the Continuously Adjustable Band Rate
    CAO Sai-Nan, LIU Fang
    . 2011, 24(12):  53. 
    Abstract ( 1771 )   PDF (478KB) ( 857 )  
    References | Related Articles | Metrics

    In the serial communication technology for the continuously adjustable band rate based on the PCI interface,the serial communication module,as a local module in the PCI interface,is a bridge for the communication between the PCI interface module and exterior serial information.This paper studies the realization of the continuously adjustable band rate  accomplishes the realization and testing of the communication based on PCI and FPGA.It is flexible in design and can be applied widely.

    IEEE802.15.4/ZigBee-Based Voice Communications System
    LI Li, WANG Jing-Mei, SUN Jun, GONG Wei-Jia
    . 2011, 24(12):  56. 
    Abstract ( 1682 )   PDF (669KB) ( 792 )  
    References | Related Articles | Metrics

    A wireless communications technology program based on IEEE802.15.4 is proposed.A low-power chip CC2420 which conforms with ZigBee specification developed by Chipcon Enterprise is used in this program.This paper briefly introduces the architecture of wireless voice communication and a design of wireless system which uses MSP430 microcontroller and CC2420 RF transceiver.A good short-range wireless transmission and PWM output are achieved by using small external components;the effectiveness of wireless transmission is tested by sine wave.The results show that this program has the advantages of low cost and better sound quality.

    A Research on Improved Radar Target Recognition Based on MTI Technique
    ZHU Ze-Feng, WANG Peng-Yu
    . 2011, 24(12):  60. 
    Abstract ( 989 )   PDF (853KB) ( 802 )  
    References | Related Articles | Metrics

    In order to improve the ability of the radar to detect and track fast moving object on the sea surface,this paper mainly discusses the cancellation technique which can suppress fixed targets and coastal clutters based on MTI,so that the echoes of the moving target are preserved and the moving target is rapidly detected,tracked and measured.

    Identification Technology for Individual Radio Transmitters
    ZHU Li-Li, WANG Ai-Fen, ZHAO Xing
    . 2011, 24(12):  63. 
    Abstract ( 1097 )   PDF (546KB) ( 920 )  
    References | Related Articles | Metrics

    Recently identification of individual radio transmitters is an important problem,which is different from traditional modulation identification of communication signals.Identification technology of radio transmitters is an analysis and extraction technology based on individual different signal dactylogram of the same kind of radio transmitters.The difficulties and solution are discussed in this article.The individual characters of steady radio signals,such as radio transmitters offset of carrier frequency and modulation parameter and the difference of signal hash export component,are discussed.These characters are carried as signal dactylogram reflecting the individual technical characteristic of radio transmitters.An identification project of individual radio transmitters is proposed which is important for individual identification to play a role in the military communication counter-measure program.

    Design and Implementation of IP Core for Stepping Motor Controller Based on Nios II
    LIU Hong-Ming, GE Gunang-Ying
    . 2011, 24(12):  66. 
    Abstract ( 1327 )   PDF (563KB) ( 838 )  
    References | Related Articles | Metrics

    According to the Nios II's Avalon bus specification,the paper introduces the design of a stepping motor controller IP core.The method uses collaborative design of software and hardware of custom components to achieve stepping motor controller IP core.The controller agrees with the read and write transmission timing of the Avalon bus and has complete driving capacity.The simulation results show that the IP core has good reusability and efficiency and can be shared.

    The Design of SmartHome Terminal in the Smart Grid
    JIAO Teng, QI Yin-Cheng, SUN Zhuo, PENG Chao
    . 2011, 24(12):  69. 
    Abstract ( 1531 )   PDF (608KB) ( 796 )  
    References | Related Articles | Metrics

    This paper describes the features and functions of the terminal in the intelligent community,studies and proposes a design of a smarthome terminal based on ARM chips and using the Linux operating system.In theory,it realizes the basic functions of the terminal and offers a solution to the future development of these products.

    IP Core Design of SVPWM Based on Nios II Processor
    DU Xiao
    . 2011, 24(12):  72. 
    Abstract ( 1181 )   PDF (700KB) ( 774 )  
    References | Related Articles | Metrics

    In order to reduce the algorithm complexity of FPGA implementation for 3-level SVPWM and the resources occupied by the SVPWM module,the paper proposes a new SVPWM control algorithm by using the small capacity ROM and the relationship between sine and cosine functions.The hardware design of the algorithm is implemented by using Verilog HDL,and packaged into IP cores to facilitate design reuse.The design is tested and verified by Altera's DE2 board,which shows the flexibility and expandability of the SOPC embedded system.

    Design of the Microcontroller-Based Remote Control Device for the Home Phone
    DENG Peng
    . 2011, 24(12):  75. 
    Abstract ( 945 )   PDF (574KB) ( 738 )  
    References | Related Articles | Metrics

    This paper designs and implements a telephone-based channel remote control of home appliances.The device uses single-chip intelligent control.By using different tones,different operations are indicated and the information about the status of the controlled party is fed back,allowing the operator to keep abreast of the information about the controlled party,so that products meet the interactive and intelligent requirement.Actual testing shows that the device is economical and reliable and agrees with the future direction of the intelligent home appliance.It is of some practical value.

    The Temperature and Flow Sensor Design of the Research and Implementation of the Charge System of Heating for Separate Door
    HE Jing, WANG Yong-Sheng
    . 2011, 24(12):  78. 
    Abstract ( 1219 )   PDF (682KB) ( 742 )  
    References | Related Articles | Metrics

    In view of the difficulty of heat fee collection and unreasonable billing by area,a new type of intelligent meter and its accompanying remote automatic meter reading system is designed in this paper.The entire system is composed of warm air measuring appliance,data transmission system and PC.Through real-time measurement of voltage difference of Pt1000 bridge ends by the heat meter,it calculates the temperature by counting the Hall flowing meter.It obtains the flow value of the users in a short period of time by virtue of the final application of flow and heat.The amount of heat value measurement data can be passed through the CAN bus to the PC,whose management system processes the data.Testing shows that this scheme can achieve intelligent measurement of heat fee in communities.

    Security Argumentation for the Infrared Module Based SCM Electronic Combination Lock
    GAN Yi-Lin
    . 2011, 24(12):  81. 
    Abstract ( 1307 )   PDF (765KB) ( 677 )  
    References | Related Articles | Metrics

    Single Chip Microcomputer (SCM) is used as the main control unit.The design can unlock the door or make a warning,with the help of the peripheral circuit,such as keyboard,LCD display,AT24C02 (password memory),and remote control module.In addition,users can change the password to improve the security standard of the lock.The remote control is human-friendly and has been applied widely.

    Design of DSP Expansion Bus Interface Based on TMS320C6000
    WANG Da-Qing, CHEN Yu, ZHAO Hui, GONG Ke
    . 2011, 24(12):  86. 
    Abstract ( 1115 )   PDF (332KB) ( 659 )  
    References | Related Articles | Metrics

    An interface of expansion bus based on the TMS320C6000 by TI Company is designed.The composition and work mode of the expansion bus of C6000 DSPs are introduced.A scheme of data transmission between two DSPs is provided.A software flow chart is presented.The circuit design and software are easy to implement.The transmission rate can reach 3.2 Gbit·s-1 in the asynchronous I/O Mode,and DSP's throughput is improved greatly.

    Design and Simulation of the FFT for the FPGA-Based High-precision Floating Point Unit
    ZHANG Xue-Jiao, WU Ping-Hui
    . 2011, 24(12):  88. 
    Abstract ( 1460 )   PDF (479KB) ( 729 )  
    References | Related Articles | Metrics

    Based on the IEEE floating point format and the FFT algorithm,this paper puts forward a 2FFT-based method based on FPGA.It completes the FFT design for the FPGA-based high-precision floating point unit.It describes the butterfly process and address generation unit processes by using VHDL.The simulation waveform can basically shows the output results correctly.

    Detection of Random-Phase Weak Sine Signal Based on the Duffing Equations
    LIU Li
    . 2011, 24(12):  91. 
    Abstract ( 1132 )   PDF (336KB) ( 753 )  
    References | Related Articles | Metrics

    We adopt an equation group of 16 equations to measure the weak sine signal with unknown phase place.The threshold values of the 16 equations are already confirmed.When the weak signal joins the system,we verify 16 equations one by one to see whether the phase portrait changes from chaos to big yardstick cycles in the systematic output.If so,this equation can be used to measure the signal.If not,the experiment is continued.We can find one or many equations that are suited finally.In this paper,we consider the mean of those equations with phase portrait changes as the amplitude of the weak signal.

    Analyzing of Typical Time Synchronization Technique for Wireless Sensor Networks
    YANG Ying, LIU Jun
    . 2011, 24(12):  93. 
    Abstract ( 1897 )   PDF (627KB) ( 770 )  
    References | Related Articles | Metrics

    From the characteristics of WSN,the article analyzes tree time synchronization models and existing time synchronization algorithms.According to the performance guidelines of time synchronization algorithms,these synchronization methods are compared and analyzed,which helps to make further improvement on the performance of the time synchronization algorithm.

    The Application of Wavelet in the Optical Fiber Measurement
    ZHANG Wei
    . 2011, 24(12):  97. 
    Abstract ( 976 )   PDF (430KB) ( 700 )  
    References | Related Articles | Metrics

    The paper analyzes the main principle of the OTDR,describes the technical difficulties of the OTDR,and proposes a solution based on wavelet transform.The purpose is to remove the noise in the OTDR signal and find the precise position of the event point.Theoretical proof and practical data show that the method is a viable option.

    Research on Improvements of the Texture Mapping Algorithm
    WANG Ran
    . 2011, 24(12):  99. 
    Abstract ( 978 )   PDF (854KB) ( 748 )  
    References | Related Articles | Metrics

    Texture mapping is an important part of realistic image drawing.The texture mapping algorithm this paper puts forward is improved based on two traditional mapping algorithms.Because by the traditional mapping algorithm the texture gathering phenomenon always appears in the two poles of an object and there are obvious seams,the realistic effect is not satisfactory.This paper uses suitable stretching transformation on the texture pattern,then does inverse transformation to the mapping and match the seam through the triangular mesh.By this algorithm a seamless texture is achieved and the continuity of the surface is maintained with small deformation.

    Safety Level Analysis Based on Heart Beat Safety Message in VANET
    LV Hu-Meng, YE Xue-Mei, AN Li, WANG Yuan
    . 2011, 24(12):  102. 
    Abstract ( 1185 )   PDF (609KB) ( 779 )  
    References | Related Articles | Metrics

    The primary goal of Vehicular Ad hoc Network is to provide life safety on the road.To achieve this,vehicles should make full use of safety messages.In this paper,the safety messages are divided into two types:Heart Heat Safety Message and Emergency Alarm Safety Message.We introduce the traffic flow theory and discuss the safety application based on the Heart Beat Safety Message in the Free-flow phase.The impact of successful data transmission rate and frequency transmission by Heart Beat Safety Message on the safety level is emphasized.We make the mathematical modeling from the point of probability theory.Simulation shows that improving the successful transmission rate can enhance the safety level and that a higher transmission frequency of safety messages also guarantees the safety without causing net congestion.

    Mpsoc-Based Ethernet Interface Design and Implementation
    LI Hua-Lin, SONG Tong-Jing, ZHAO Cheng-Wei
    . 2011, 24(12):  106. 
    Abstract ( 1370 )   PDF (670KB) ( 792 )  
    References | Related Articles | Metrics

    This paper studies the Ethernet data communication in multicore systems,designs the hardware interface from the Ethernet IP core to network resources of MPSoC,and decribes the design of each module and its realization.Simulation and FPGA verification results show that the Ethernet interface has real-time data communication and high throughput efficiency.A data transmission of information between multi-core systems and the network is achieved with a simple structure and reliable performance.

    A Relational Database Watermarking Algorithm Based on Chaos Transform
    ZHOU Fei, ZHAO Huai-Xun
    . 2011, 24(12):  109. 
    Abstract ( 1294 )   PDF (457KB) ( 729 )  
    References | Related Articles | Metrics

    An algorithm based on chaos transform for relational database watermarking is proposed in this paper,which uses the encrypted images sequence as watermarks and embeds them into the database according to the weight of attributes.The combination of the watermarking technology with the chaos theory improves the invisibility of watermarks.And watermark detection is blind.Experimental results show that the proposed scheme has good invisibility and robustness against various forms of attacks.

    Comparison and Simulation of the Methods for Moving Object Detection
    ZHANG Guo-Xin, ZHANG Dian-Fu, FAN Liu-Qing
    . 2011, 24(12):  112. 
    Abstract ( 1242 )   PDF (522KB) ( 1095 )  
    References | Related Articles | Metrics

    Two commonly used moving object detection methods,the Three-Frame-Differencing and mixture Gaussian model,are studied.Performances of the two methods are tested with video samples,based on which the accuracy and results are compared to indicate their applicability and limitation.

    A Novel Binaryzation Method for License Plate Location
    GAO Yun-Jie, SUN Han
    . 2011, 24(12):  114. 
    Abstract ( 1393 )   PDF (902KB) ( 854 )  
    References | Related Articles | Metrics

    The binaryzation method used in License plate location(LPL) is important.The location performance is influenced obviously by the location of binaryzation and the binaryzation method.Since the license plate region has rich edge information,its intensity as well as the local standard deviation can provide useful information for the binaryzation threshold value.This paper presents a new binaryzation method which combines intensity and standard deviation information,and then we extract license plates by fusing region ands computing connected domains.The experiment shows that this proposed binaryzation method is robust for various intensity and noise condition.It can locate the plate accurately by fusing regions and computing connected domains.

    The Status and Prospect of the Development of the Foldable Reflector Antenna
    GUO Dong-Yang, LI Ping, WANG Yi-Tong, LI Jun-Li
    . 2011, 24(12):  118. 
    Abstract ( 999 )   PDF (382KB) ( 714 )  
    References | Related Articles | Metrics

    With the development of material science,the light,portable and foldable reflector antenna has gradually extended and replaced the metal reflector antenna of solid surface on some special occasions.In this paper,the significance of the research on the foldable reflector antenna is described from the aspect of the need for technique development.The status and prospect of the development of the foldable reflector antenna is introduced from the aspects of its sort and the new opportunities brought by new materials.

    The Key Technology of Cognitive Radio
    WANG Ming-Wei, YUAN Jin-Sha, ZHAO Jian-Li, GUO Kang
    . 2011, 24(12):  120. 
    Abstract ( 1105 )   PDF (531KB) ( 702 )  
    References | Related Articles | Metrics

    The two important techniques in the understanding of the radio spectrum,perception and prediction is discussed.The system operating parameters are changed in real time adaptively according to certain learning and decision-making algorithms for the wireless communication environment for perception to dynamically detect and effectively use the free spectrum.Studies show that in theory multidimensional spectrum reuse in time,frequency and time is allowed,and thus the frequency spectrum and bandwidth constraints and the constraints on the development of the wireless technology are greatly reduced.

    Goal-oriented Plan Consolidation Technology
    LIU Hong-Yi
    . 2011, 24(12):  123. 
    Abstract ( 883 )   PDF (490KB) ( 529 )  
    References | Related Articles | Metrics

    The goal-oriented behavior planning system is a decision making algorithm in the field of artificial intelligence.It is a behavior used to create and manage automated agents.Plan consolidation can improve the system,so that the behavior range of automated agents becomes wider,and they are even made to pursue multiple goals simultaneously.This paper describes the method for the realization of the plan consolidation system and the implication of using the system in the context of real time games.

    Analysis of Initial Airworthiness Compliance for Civil Transport Category Aircraft RVSM Avionics
    ZHANG Chen
    . 2011, 24(12):  126. 
    Abstract ( 980 )   PDF (585KB) ( 634 )  
    References | Related Articles | Metrics

    One of the method for increasing civil traffic density is the introduction of the RVSM criteria to increase additional usable flight levels such that the flight level separation is 300 m throughout the band between FL290 and FL410.RVSM airspace is a special navigation area of operation.Newly designed civil aircraft should be authorized by appropriate CAAC offices before the its operator conducts flight operations in RVSM airspace.The analysis of avionics error components are deeply studied to show how a newly designed civil aircraft can meet RVSM requirement.

    Review of Key Technologies and Development of the Internet of Things
    HUANG Xiao-Bin, MAO Pei-Lin, TANG Hao-Yuan, DONG Xiao-Peng
    . 2011, 24(12):  129. 
    Abstract ( 1789 )   PDF (640KB) ( 748 )  
    References | Related Articles | Metrics

    This paper describes the conception of the Internet of things(IoT) and gives a generally accepted concept of the IoT.Then it differentiates and analyzes some network conceptions closely related to the IoT respectively,such as Ubiquitous Networks,Sensor Networks and M2M.It contrasts some architectures of the IoT based on the existing ones.Finally it introduces the key technologies and current standards of the IoT.

    Application of Wireless Local Area Network to the Campus Network
    WANG Hong-Zhi
    . 2011, 24(12):  133. 
    Abstract ( 1295 )   PDF (383KB) ( 648 )  
    References | Related Articles | Metrics

    As an extension of and complement to the campus network,the wireless local area network has distinct advantages in the aspects of networking,coverage,density,mobility,extension and management,and  the demand is extensive.Rational planning,construction and application of the campus wireless network play an important role in promoting the construction of a digital campus and the informatization of higher education.

    Computer Technology Awareness in the Application of Offensive and Defensive Basketball
    SONG Bao-Jie
    . 2011, 24(12):  135. 
    Abstract ( 865 )   PDF (391KB) ( 591 )  
    References | Related Articles | Metrics

    Basketball teaching curriculum in college sports occupies an extremely important position.In this paper,the long-term college basketball teaching,based on the description of basketball in colleges and universities to carry out the general,made a basketball offensive and defensive concept of consciousness,that the train basketball offensive and defensive awareness of the ways and means to achieve improved college basketball teaching effectiveness,and enhance student awareness of the role of offensive and defensive basketball.


Monthly,Founded in September 1987
Competent Authorities:
Ministry of Education of the People's Republic of China
Sponsored by:Xidian University
Chief Editor:Liao Guisheng
Executive Editor:Wan Liancheng
Editor:Hei Lei
Editor and Publisher:
The Editorial Department of Electronic Science and Technology
Distribution Abroad:
China Intermational Book Trading Corporation
P.O.BOx 399,Beijing 100044,China
P.O.Box 375,2 Taibai Road(South),Xi'an 710071,China
Unit Price:$20.00