Table of Content

15 December 2013 Volume 26 Issue 12
    Image Enhancement Algorithm Based on Fractional Differential
    GOU Rong
    . 2013, 26(12):  1. 
    Abstract ( 758 )   PDF (923KB) ( 780 )  
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    Different from the traditional image enhancement algorithms,the fractional differential image enhancement algorithm can enhance the high frequency of the image,and keep the middle and the low frequency of the image corresponding to the image texture detail and smoothing region.The paper designs a 5×5 image enhancement template based on the Riemann-Liouville fractional differential definition,and uses the fractional differential image enhancement algorithms (Sobel,Prewitt,and Laplacian) to experiment the image enhancement effect.Finally the entropy of the results by these image enhancement algorithms are analyzed,which shows that the image entropy after the processing increases with the fractional differential order,a proof of enhancement of image texture details.

    Improved Adaptive Filtering Algorithm for Removing Pulse Noise
    AI Chao, HU Fang-Ming
    . 2013, 26(12):  5. 
    Abstract ( 1056 )   PDF (1814KB) ( 655 )  
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    This paper proposes an improved adaptive median filtering algorithm for the recovery of gray-scale images polluted by impulse noise.According to the distributed noise,this method checks and identifies noise through maximum-minimum and field mean criterion,and then filters noise using the median of the smallest noise free pixels collection in the detected window.Experimental results indicate that the proposed method is of higher peak signal noise ratio (PSNR) and structural similarity (SSIM) and has lower time complexity and better adaptability than other methods.Furthermore,the proposed method can not only effectively detect and filter out the noise but also preserve the image details.

    Design and Implementation of the Grey Clustering Decision System
    CHEN Bao-Ping
    . 2013, 26(12):  10. 
    Abstract ( 970 )   PDF (584KB) ( 585 )  
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    Grey cluster decision analysis has a very broad field of application.The basic principles and analysis processes of gray clustering decision are discussed.The grey cluster decision system is realized using C+[KG-1.5mm]+ language.Test results show that this system is practical and efficient with good accuracy and stability.

    A GPU-based Chirp Signal Pulse Compression Algorithm
    DONG Ya-Qing
    . 2013, 26(12):  12. 
    Abstract ( 988 )   PDF (741KB) ( 645 )  
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    This paper researches pulse compression algorithm of linear frequency modulation signal by using CUDA technology of the NVIDIA,and simulates the algorithm on the GPU platform using CUDA C language and on the CPU platform using C language respectively,and compares the execution times.The experimental results show that the efficiency of pulse compression algorithm on GPU platform is significantly higher than that on the CPU one.

    A New Nonmonotone Multidimensional Filter Trust Region of a New Conic Model
    ZHOU Xin-Hui, LI Xiao-Wei
    . 2013, 26(12):  17. 
    Abstract ( 872 )   PDF (584KB) ( 609 )  
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    Nonmonotone technique has been widely applied in the trust region with good results.A new filter trust region method is proposed by combining nonmonotone techniques with the multidimensional filter technology.The algorithm constructs a new ratio in each iteration to adjust trust region radius of the computation,and uses multiple filtering to improve the probability of acceptance and the experiment when the test steps are not accepted.The global convergence of algorithm is proved under certain conditions.Numerical experiments show that the algorithm is effective.

    Stationary Distribution of the Markov-modulated Reflected O-U Process
    YANG Bing
    . 2013, 26(12):  20. 
    Abstract ( 809 )   PDF (506KB) ( 576 )  
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    This paper studies the reflected Markov-modulated Ornstein-Uhlenbeck process with a two sided reflection and a jump,in which the coefficient,the two boundaries and the jump are modulated by a finite state space irreducible continuous time Markov chain.It is proved that the stationary distribution of this process satisfies an interactive ordinary integro-differential equation,and the equation has unique solution where the Markov chain has two states.The numerical illustration for the stationary distribution is given by choosing appropriate boundary condition.

    Reflected CEV Processes and Pricing of Defaultable Bonds
    CUI Ling-Li
    . 2013, 26(12):  23. 
    Abstract ( 717 )   PDF (543KB) ( 572 )  
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    The modeling of default recovery rate and the series representation of the risk-neutral price function of the defaultable bonds under the reflected constant elasticity of variance (CEV) processes are studied.An example related to the reflected Brownian motion is presented as a special case of the reflected CEV processes.Numerical illustrations of the risk-neutral price function of defaultable bonds with respect to the default recovery rate and the default intensity are discussed respectively when the default recovery rate is described as a reflected Brownian motion.

    Realization of Calling Redirection Based On SIP Protocol
    YU Yong-Jia
    . 2013, 26(12):  27. 
    Abstract ( 971 )   PDF (630KB) ( 600 )  
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    With the popularization of the VoIP network,many big companies begin to use VoIP voice switches to access the VoIP PSTN and equip the busy employees with extension terminals.Customer calling can be redirected to the employee's mobile phone via VoIP voice switcher when the employee is not in office.The calling sequences in different situations are designed in this article to realize calling redirection based on SIP protocol.

    SVPWM Signal Generator Based on TMS320F28335
    WANG Xia, ZHU Jing-Wei, DIAO Liang
    . 2013, 26(12):  30. 
    Abstract ( 943 )   PDF (853KB) ( 771 )  
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    The space vector pulse width modulation (SVPWM) can improve the utilization of DC side voltage,and finds wide applications not only in frequency control systems but also in many other fields.Based on the analysis of the basic principle of SVPWM,this paper details TMS320F28335 SVPWM control algorithm combined with the three-phase H-bridge inverter circuit and achieves SVPWM waves in the case of the inverter circuit with one phase open.Through the combination of hardware and software,the debug and experimental observation worked on DSP experimental platforms and experimental results are given in waveforms.The results show that SVPWM algorithm based on DSP is easy to implement and digitize,meeting the different requirements of the drive signal by power devices and facilitating the realization of fault-tolerant control.

    Capture of PN Code Sequence in Spread Spectrum Communication
    ZHANG Kai
    . 2013, 26(12):  34. 
    Abstract ( 859 )   PDF (558KB) ( 663 )  
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    Spread spectrum signal acquisition and tracking is the basis of dispreading positioning spread spectrum receiver.This paper presents an implementation of spread spectrum signal capture and tracking based on FPGA.The design and implementation of the matched filter,carrier tracking loop,and the code tracking loop are given.The parallel capture PN code not coherent spread spectrum communication algorithm is adopted to realize the signal capture by BPSK modulation.

    Design and Realization of Multi-Channel Digital Signals Multiplexer/De-Multiplexer Based on FPGA
    ZHAO Yi, DAN Tao
    . 2013, 26(12):  37. 
    Abstract ( 978 )   PDF (657KB) ( 671 )  
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    An important technique in the network of communication,digital multiplexing and de-multiplexing can improve the transmission efficiency by multiplexing several low speed data flows into a high speed one.After a brief introduction to the multiplexing system,a design using VHDL for digital multiplexing and de-multiplexing is proposed.The FIFO,ping-pong operation and frame synchronization system are adopted.QuartusII8.0 is used for simulation,which shows that the design realizes the function with more flexible circuit structure and less system resource consumption.

    Design of a Mine Digital Communication System
    HOU Chang-Bo, WANG Jia-Jia
    . 2013, 26(12):  40. 
    Abstract ( 1203 )   PDF (686KB) ( 752 )  
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    A solution to digital voice communication is presented for coal mine safety.The MBE compression technology is used to compress the voice data,and the STM32F107 is adopted as the main control chip for real-time long-distance voice transmission base on the built-in CAN bus controller.The design of system hardware and software design is given.Tests in practical environment show that our design has good stability and real-time performance.

    A Novel Ultra-wideband Tapered Slot Antenna
    LU Yan, ZHAO Yi-Min, HU Ju-Hang
    . 2013, 26(12):  44. 
    Abstract ( 1098 )   PDF (664KB) ( 601 )  
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    This paper elaborates a design of the tapered slot antenna.A semi-oval shaped slot is introduced at the outer edge of the radiating arm to improve the directivity in the low band,thus achieving an ultra-wide band,wide-beam,high-gain performance.The perpendicular-polarized antenna is simulated and analyzed with HFSS12.The measured results show that the VSWR is less than 2 within 2~13 GHz,and the highest gain of antenna can be as high as 11 dB with good directionality.The measured results agree well with simulated ones,indicating the effectiveness and validity of the design.

    A Small Circular Polarization Four-arm Spiral RFID Antenna
    WANG Yong-Qiang, LEI Zhen-Ya, LI Lei, CHEN Lei
    . 2013, 26(12):  47. 
    Abstract ( 943 )   PDF (629KB) ( 614 )  
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    A compact quadrifilar spiral antenna (QSA) with right-hand circular polarization for UHF band RFID reader is presented.The proposed QSA consists of four long arms printed on substrate and fed by microstrip feed network.A new match method is used when four individual ports are connected to the feed network.The proposed antenna has a size of 60 mm×60 mm×6 mm,the peak gain is 3.5 dB with the axial ratio under 2 dB,the 3 dB beamwidth is more than 120° and the front-to-back ratio is more than 15 dB.The antenna is fabricated and measured,and the results agree well with the simulation.

    A Novel Narrowband Interference Cancellation Technique for OFDM System
    CHENG Gao-Yuan, LV Ming
    . 2013, 26(12):  50. 
    Abstract ( 1099 )   PDF (588KB) ( 620 )  
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    OFDM system takes advantage of the orthogonal sub-carriers and makes full use of spectrum resources,but may affect more subcarriers and lead to a serious deterioration in the status of the system BER performance due to narrow-band interference.This paper proposes an OFDM system narrowband interference cancellation technique.Disturbed subcarriers are detected at the receiving end using a feedback channel to inform the transmitting side,and the information of the interfered sub-carriers without modulation at the transmitting end are sent to the channel.These carriers are limited only by the influence of the interference signal,and are reconstructed and stored at the receiving end,thereby removing the interference to ensure the normal communication.Simulation and analysis results show that the method can effectively inhibit the narrowband interference of OFDM system without wasting spectrum resources.

    Design and Implementation of NAT Routing Based on WinPcap
    HONG Jin-Dong, JIAO Feng-Xian, WEI Rong
    . 2013, 26(12):  53. 
    Abstract ( 1038 )   PDF (588KB) ( 926 )  
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    Based on the analysis of NAT routing,this paper propose an NAT router which works on the application layer of Windows system and is realized with the WinPcap software.Different from the Internet Sharing of Windows or the traditional small routers,this solution preserves the filter layer interface,thus facilitates the extension of network monitoring.

    Nakagami-m Channel Repeater Amplification and Forward Incremental Performance Analysis
    ZHOU Li-Hua
    . 2013, 26(12):  56. 
    Abstract ( 930 )   PDF (564KB) ( 582 )  
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    Compared with the regular cooperative diversity networks,incremental relaying cooperative diversity makes more efficient use of the channel resources.In this paper,the end-to-end performance of incremental relaying for amplify-and-forward (AF) cooperative diversity networks over independent and identical distributed (i.i.d.) flat Nakagami-m fading channels is analyzed.Tight lower bounds closed-form expressions for the bit error rate (BER) and the signal-to-noise ratio (SNR) outage probability are given.Numerical investigation shows that the analytic result makes an exact match with the simulation,and system performances in different cases are evaluated and compared.

    Design of LNA for the WCDMA Front Receiver
    XIAO Ben, CHEN Yong-Cong
    . 2013, 26(12):  60. 
    Abstract ( 834 )   PDF (575KB) ( 713 )  
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    The working principles of low noise amplifier and the sources of noise are discussed.A cascade COMS low noise amplifier using TSMC90nm technique is designed for WCDMA systems.Testing results show that this circuit operates at 2 GHz with NF of 1.4 dB,voltage gain of 20 dB,and IIP3 of -3.43 dBm.This amplifier can be used for various communication systems.

    Analysis of the Broadband Voltage Controlled Band-stop Filter
    LI Jian
    . 2013, 26(12):  63. 
    Abstract ( 723 )   PDF (693KB) ( 564 )  
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    In the relay communications,communication signals in the transmission process are often disturbed by outside a wide band signal,seriously affecting the communication quality and operation of protection devices particularly in the carrier communications.However,traditional narrow band stop filters (including notch filter) have such a limited attenuation range that ideal effect of interference signal attenuation cannot be achieved in this band.A wideband voltage-controlled band-stop filter can meet this requirement,and the voltage control circuit has the advantages of stable performance and easily adjustable gain.The input and output amplitude frequency characteristics of voltage-controlled band-stop filter are analyzed and its extended applications are introduced.

    Design and Implementation of LNA Module for GPS and COMPASS Dual-Band Receiver
    GAO Guang-Hui, SHI Yu, ZHAO Bao-Lin
    . 2013, 26(12):  67. 
    Abstract ( 979 )   PDF (708KB) ( 735 )  
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    An LNA module overlapping GPS L1 frequency band and COMPASS B1 frequency band is designed and implemented.LNAs of the module are realized by discrete components.The matching circuits can be debugged flexibly to meet the high requirements of input and output VSWR of the module.Test results show that the LNA module gain is 26 dB with high flatness,an input and output VSWR<1.5,a noise figure<2 dB,an out-of-band suppression of 80 dBc,and an output 1 dB compression point of 8 dBm,which meet the demand of receiver front end of navigation system.

    Temperature Detection and Protection Circuit Based on the AT89S52 Microcontroller
    SUN Liang
    . 2013, 26(12):  70. 
    Abstract ( 774 )   PDF (589KB) ( 612 )  
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    This paper presents a real-time multi-point temperature detection circuit design with ATMEL AT89S52 MCU and DALLAS DS18B20 single-bus digital temperature sensor as the core.The detection units can functions independently with timing acquisition of temperature according to the next-bit machine instruction.The real-time temperature measurement results are displayed locally,and the relay is disconnected if the value goes beyond in the security limit.The collected data can be sent to the host computer when necessary via single-chip serial port using an RS-485 bus and communication protocols for archiving and disposal.

    Design of an ARM7-based Monitoring Device in Mine
    ZHAI Dang-Guo, FU Pei-Qi, FU Zhou-Xin, ZHAO Jian-Wen
    . 2013, 26(12):  72. 
    Abstract ( 770 )   PDF (543KB) ( 661 )  
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    As for the characteristics of multiple feeders and complex communication protocol of current coal mine power system,a design of a multi-protocol monitoring device with RS-485 interface is proposed.This paper presents the overall structure of the device,and details of the device software and hardware design.The device can implement real-time accurate monitoring on RS-485 devices with a variety of protocols and baud rates,thus effectively improving the digitizing mine safety monitoring capabilities.

    Design and Implementation of Seven-electrode Conductivity Sensor Measurement Circuit
    FAN Han-Bai, HU Yang, DANG Wu-Song
    . 2013, 26(12):  75. 
    Abstract ( 1089 )   PDF (540KB) ( 1288 )  
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    The fast and accurate conductivity measurement is of great significance in marine research and environmental protection.The article describes the basic principles and characteristics of the seven electrode conductivity sensor,and designs a fast measurement circuit with low temperature drift and high accuracy based on of the physical characteristics of the sensor itself as well as the requirements for high-precision measurement.D/A and A/D integrated circuit chips are used for precise sensor driving and high-speed sampling.The driving frequency and voltage are more accurate and easier to adjust than those of the traditional circuits,while the high-speed sampling avoids signal distortion in conditioning process.The effect of measurement is verified by experiments.

    Design and Implementation of the Electromagnetic Sensor for the Cable Fault Detection
    QI Yu-Lin, GAO Qiao-Mei, SUN Shi-Hao, LI Jin-Jie
    . 2013, 26(12):  78. 
    Abstract ( 1157 )   PDF (915KB) ( 679 )  
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    An electromagnetic sensor is designed according to the principle of electromagnetic induction for electromagnetic signals detection.The electromagnetic sensor can pickup the change of the magnetic field signal according to the changing magnetic field generated by the fault point,and converts it into the induced voltage.The induced voltage is amplified and rectified and then fed into the follow-up testing and indicating circuit to determine the location of the fault point.

    High Brightness Stroboscope Lamp Based on HV9910 with Self-Adaptive Temperature and Wide Voltage Input
    JIN Yong-Gao, HUANG Xin
    . 2013, 26(12):  82. 
    Abstract ( 822 )   PDF (671KB) ( 764 )  
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    A high brightness stroboscope lamp based on HV9910 chip is presented with an input voltage range of 10~50V.The combination of HV9910 LD lead and the thermal sensitivity characteristics of diode yield its adaptability to the internal high temperature changes.The lamp utilizes HV9910 internal power supply for the micro-power MK6A12P with over-voltage protection and multiple modes.

    A Pulse Parameter Tester Based on AT89S52
    TUO Bing
    . 2013, 26(12):  86. 
    Abstract ( 883 )   PDF (519KB) ( 674 )  
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    A pulse parameters test instrument is designed to measure and display the pulse width,period,frequency,duty ratio and peak value of pulse with easy reading.The input signal is shaped by LM393 to realize the measurement of pulse width,period and frequency using AT89S52 with software realization.The peak hold is achieved using LM398,and the peak value is converted into the corresponding frequency by LF331 for the AT89S52 to complete the final measurement and display.The instrument has good performance,simple circuit,and accurate test results.

    Monitoring of Temperature,Humidity and Air Pressure in Simulation of Atmospheric Turbulence
    LIU Lu-Lu, ZHANG Peng, YANG Mu, LI De-Li, QIU Xuan-Bing, WEI Ji-Lin
    . 2013, 26(12):  89. 
    Abstract ( 1097 )   PDF (678KB) ( 720 )  
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    The monitoring system is an important part of the gas turbulence pool.STC12C4052AD is used as the core processor in our super-miniature gas monitoring system,which consists of sensors DHT22,MPX4115 and the display LCD1602,to realize the monitoring of gas temperature,gas humidity and gas pressure in the turbulence by the conversion of A/D.The system has the advantages of simple construction,low cost,stable operation and easy implementation.

    Design of Acquisition Circuit for pH online meter based on AD7792
    TAN Jing
    . 2013, 26(12):  93. 
    Abstract ( 946 )   PDF (536KB) ( 831 )  
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    Drift with time and temperature are very important factors during pH online measurement,so in pH meter design,low drift and an accurate signal chain would be required. For the purpose,a simple solution is provided with a low bias current amplifier,ADA4505,and a high accurate AD convert,AD7792. The ADA4504 is used as a buffer to achieve accurate pH measurement since pH electrodes have a very large output resistance. And the AD7792 is a 16-bit ADC,which is also responsible for temperature measurement for compensation. Experiment result shows that the design can keep high precision in a wide temperature range.

    Implementation and Improvement of FFT Based on FPGA IP Core
    LI Xu-Guang, HE Guo-Jing, LIU Jiang-Tao
    . 2013, 26(12):  96. 
    Abstract ( 982 )   PDF (806KB) ( 585 )  
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    This paper designs a high speed and efficiency FFT system based on FPGA IP Core.For the leakage of frequency spectrum caused by the truncation of non integral multiple of signal period,a method for restraining leakage of frequency spectrum by windowing the input signal is proposed.This design is simulated with Modelsim and Matlab,and verified on the Altera Cyclone II hardware platform.The results show that the system has good performance with significant improvement.

    Design of a Liquid-Cooled Power Amplifier Module
    BAI Hong-Bing, GAO Shuang-Hu
    . 2013, 26(12):  101. 
    Abstract ( 850 )   PDF (820KB) ( 571 )  
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    A liquid cooled cold plate airborne electronic equipment is designed according to practical product requirements.Simulation shows that to the design meets thermal design requirements of modular airborne electronic equipments.

    Research on and Realization of a Display Driver Based on the Touch LCD Screen of JM320240
    HAN Xiao-Jing, YU Chang-Sheng
    . 2013, 26(12):  104. 
    Abstract ( 993 )   PDF (714KB) ( 663 )  
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    As a new input device,the touch screen is becoming a major human-computer interaction method for its convenience and simplicity operation.This paper studies the hardware circuit and software program of display driver of the touch screen JM302240 LCD and designs a simple battery monitoring and control system to verify the feasibility and reliability of the drive circuit and software.Simulation shows that the LCD driver meets the general  military and industrial needs.

    Application of the Tunable Laser Spectroscopy System in Gas Detection
    LIU Jian-Chang, DENG Guang-Fu
    . 2013, 26(12):  107. 
    Abstract ( 1009 )   PDF (552KB) ( 478 )  
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    The tunable diode laser absorption spectroscopy is adopted for quick and precise gas concentration measurement.Theoretical analysis shows that the even harmonics reach maximum at the resonant location and its amplitude drops successively,and therefore the concentration of gas can be obtained by the second harmonic detection method.An experimental system is established to detect the concentration of 0%~ 15% CH4 gases.Theoretical analysis and experimental results show that the linear dependency between the amplitude of second harmonic and the concentration value of gas can reach 0.994,indicating that accurate concentration value of gas can be obtained by second harmonic.

    Design of the Lock-in Amplifier Based on FPGA and its Application in Photoacoustic Signal Detection
    NI Shi-Hu, LIU Xian-Yong, CAO Xin-Dan, LI Jin
    . 2013, 26(12):  110. 
    Abstract ( 955 )   PDF (753KB) ( 749 )  
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    A lock-in amplifier based on FPGA is designed and implemented with the Quartus II software of Altera and simulated in Modelsim.This lock-in amplifier is used in the photoacoustic gas sensor to detect CH4.The results show that it can extract weak signal from noise effectively and measure the concentration of CH4.For a gas concentration between 0%~3%,the output of lock-in amplifier has good linearity with a 5 Hz stop frequency of low pass filter.The output of system has good consistency when the frequency of input signal is below 10 kHz.

    Design of Pixel Clock Recovery at Receiving End of Image Transmission Based on FPGA
    ZENG Peng-Fei, TANG Qing-Shan, MIN Ying-Tao, TANG Li-Jun, GUO Li-Li, DANG Chen-Lang
    . 2013, 26(12):  114. 
    Abstract ( 875 )   PDF (777KB) ( 716 )  
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    According to the structure and related features of PLL in Xilinx Spartan-6,a method is proposed for configuring the pixel clock in the image transmission dynamically.The encoded value from different pixel clocks and the image data from the transmitting end are sent to the receiving end,and the corresponding pixel clock is recovered through PLL dynamic reconfiguration with on-line switchover of the image transmission formats in 1.4 μs.This design features a simple interface,fast speed frequency conversion,hard real-time,high stability,instantaneity and flexibility,and has already been successfully applied in some optical products.

    A Multi-relay Cooperation Scheme Based on QOSTBC
    JI Yan-Cheng, ZHANG Guo-An, ZHANG Shi-Bing, LIU Min
    . 2013, 26(12):  118. 
    Abstract ( 867 )   PDF (747KB) ( 594 )  
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    A multi-relay cooperation scheme based on selection relaying (SR) protocol based on quasi-orthogonal space-time code (QOSTBC) is presented.The spatial diversity performance of the scheme is discussed from two aspects: pair wise error probability (PEP) analysis shows that if all the relays correctly decode the information,the scheme can achieve full diversity gains;and if certain relays unsuccessfully decode the information,the scheme can only obtain partial diversity gains.A comparison between the proposed scheme and the cooperation scheme utilizing orthogonal Space-Time code (OSTBC) demonstrates that both schemes can achieve full diversity gains at high signal-to-noise ratio (SNR),but the proposed scheme has higher coding gains.And when the SNR becomes lower,the proposed scheme has higher diversity and coding gains.

    Design of Information Management System of Oilfield Equipments
    LI Jing-Jing, SUN Wan-Rong, XUE Dan, YANG Zi-Feng, JIA Hai-Long
    . 2013, 26(12):  122. 
    Abstract ( 853 )   PDF (992KB) ( 621 )  
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    The design of an information management system for oilfield equipments based on B/S model is presented in this paper.A web management platform is construct in the framework of struts 2 model on account of MVC,in which the equipment information both static and dynamic are unified controlled by the system.The overall aim,the main functions and the realization of this system are also given.In this system,JDBC technology is employed to access the database,and the reasonable use of JSP and AJAX technology improves the Web-based user interfaces.This system can promote the oilfield equipment information management  with better working efficiencies of both equipments and operators.

    Analysis of Computer Modeling and Man-Machine Model Kinematics
    GU Qi-Fang, LU Li-Ting
    . 2013, 26(12):  127. 
    Abstract ( 1040 )   PDF (719KB) ( 573 )  
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    A growing number of old people in China suffer from hemiplegia and physical disability due to various causes.Rehabilitation robot treatment for such patients has obvious effect.A human lower limbs rigid body model is put forward according to human lower limb motion mechanism,which combines the patients' lower limb flexion and extension movement and rehabilitation training to design two plane closed-loop slider-crank man-machine models.The kinematics analysis of the man-machine model lays theoretical basis for scientific passive training of the patients.

    Design of an Android-based Phone Number Query System
    YANG Tao, LI Yin-Feng, HU Qiu-Ling
    . 2013, 26(12):  131. 
    Abstract ( 1242 )   PDF (903KB) ( 636 )  
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    This paper first introduces the Android operating system and the key technology of Telephone Query System based on Android.The specific design and part of the realization process of the system are then described.Finally,the running results of the system are given.The system runs perfectly on the current mainstream android mobile devices such as mobile phones and tablet computers,and provides great convenience for the users.

    Embedded License Plate Recognition System Based on Blackfin561
    YU Peng, WANG Jia-Cheng, JIA Wei-Gang
    . 2013, 26(12):  135. 
    Abstract ( 889 )   PDF (706KB) ( 884 )  
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    A dual-core DSP Blackfin561 embedded license plate recognition system is introduced.The hardware structure and software flow,as well as the neural network-based license plate recognition Hpofield methods and processes are discussed.The f video image is decoded to obtain the brightness of the image signal,then the image is processed such as adjustment,positioning,and segmentation;and finally,Hopfield neural network is used to identify the license plate character information.

    Design and Implement of Grid Service for Resolving Rules Inconsistency
    JIANG Xian-Wei, WANG Jun-Xiang
    . 2013, 26(12):  138. 
    Abstract ( 869 )   PDF (520KB) ( 737 )  
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    This papers summarizes the cases of rules inconsistency and presents approaches to the checking and resolution of rules inconsistency in merging rule bases.Grid services for resolving rules inconsistency are realized by the developing of the function modules of rules merging and parsing,and the modules of rules inconsistency checking and resolving.

    A FPGA-based Classroom Interaction Gesture Recognition System
    ZHANG Hui-Jie, CHANG Wen-Jing, LI Jia
    . 2013, 26(12):  141. 
    Abstract ( 1058 )   PDF (632KB) ( 635 )  
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    Gestures are a natural and intuitive interpersonal communication model,and vision-based gesture recognition is an indispensable and key technology which can achieve a new generation of human-computer interaction.This article combines gesture recognition and the control of slideshow system with four dynamic gestures defined.Arresting gesture moving centroid overcomes the shortcoming of complicated gestures.A convenient classroom interaction gesture recognition system is achieved with FPGA as the main operating platform combined with MATLAB simulation.

    Key Feature Mining of Financial Data with Optimization Guidance of Multi-state Index
    ZHANG Zhi-Hong
    . 2013, 26(12):  144. 
    Abstract ( 743 )   PDF (716KB) ( 449 )  
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    Introduced the research a kind of state index optimization under the guidance of key characteristics of the financial data mining method;The key characteristics of the massive financial data mining is the modern mass data situation,fast information necessary for mining method;Traditional mass financial data mining methods the general characteristics of the mining method,common characteristics of key financial data mining,the lack of considering the characteristics of financial data distribution,unable to realize the characteristics of deep mining;Proposed a state introduced the index optimization guide the key features of the financial data mining method,by introducing the idea of multiple state index optimization guidance to guide the key to the massive financial data mining,to more detailed financial data characteristics of digging,to extract the depth of the financial data;Finally USES a set of features close vocabulary in financial data mining experiment,the results show that,based on the introduction of more state index optimization with the mining method of guidance,financial data is good apart from the key characteristic and has extensive value of application.

    Information Extraction Technology in the Application of Military Plotting System
    SUN Shi-Yao
    . 2013, 26(12):  148. 
    Abstract ( 837 )   PDF (547KB) ( 456 )  
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    Military plotting system is an important tool of military training,combat and command.Information extraction technology is one of the key technology to realize the automation of the military plotting system.According to the characteristics of military plotting,we compared and analyzed the application of the information extraction technology in the military plotting system,proposed some strategies of the information extraction for the military plotting system.

    Integrated Application of Satellite Technology in Seismic Industry
    LAN Chang-Yuan, LIU Yang, ZHANG Wei
    . 2013, 26(12):  151. 
    Abstract ( 858 )   PDF (939KB) ( 420 )  
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    This paper introduces a satellite application system for the seismic industry,which combines the characteristics and advantages of satellite remote sensing,satellite communications and satellite navigation technologies.This system comprises a digital management and service platform that can improve earthquake prevention and disaster mitigation.

    Application of EDA Technology in MCU Experiment Teaching
    PAN Jie, PEI Hong-Wen
    . 2013, 26(12):  154. 
    Abstract ( 795 )   PDF (829KB) ( 450 )  
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    EDA technology is widely used in SCM practice skill training.The modeling,simulation and debugging of SCM experiment are performed in the PROTEUS software and on the hardware circuit,which proves to be economic,practical and fast in experiment teaching.


Monthly,Founded in September 1987
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Ministry of Education of the People's Republic of China
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