bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on Single-Phase Back-to-Back SVG Solution of Power Pollution of Traction Transformer to Accessed Grid
Authors: Chen Jia Yong , Guo Kun Ya , Jin Peng , Wang Shu Han
Published: December 2014

Electrified railway traction transformer is a pivot that connects the electric locomotive and the public grid. Therefore, power quality problems caused by electric locomotive such as three-phase voltage imbalance, great voltage fluctuation and high harmonic content can be transmitted to the public grid via the traction transformer. To solve this problem, the solution of two sets of single-phase SVG (Static Var Generator) in back-to-back operation to solve power quality problems of the electrified railway is raised. This solution has been proved by practice effective in improving power quality of the traction transformer.
Research of Network Camera Based on TMS320DM8168
Authors: Li Jian , Yu Chang Hang , Xue Ding Zhu , Gu Hong Jun
Published: December 2014

The paper adopts the TMS320DM8168 processor to realize highly resolution network video surveillance system, and selects highly efficient video coding standard—H.264 compression algorithm to enhance the efficiency of coding data. The system based on embedded Linux system and the TMS320DM8168 processor is put forward which can be operated on 8-megapixel.At 60 frames per second in full frame rates, It is the video stream up to 2Mbps rate to provide resolution of 1920x1080 pixels. The Three video streams can be transferred in the 1000M Ethernet applied with the real time transport protocol (RTP) and real time transport control protocol (RTCP).
Application of Fuzzy Control System in Heat Transfer Station
Authors: Tian Jia
Published: December 2014

The heat transfer station is a core part of the heating system, energy savings and reduce consumption can proceed from three aspects. Wherein the optimization algorithm is a very important part. In this paper, fuzzy control algorithm for controlling the temperature of the heat transfer station, through simulation comparison and found that the algorithm can indeed play a role in saving energy and reduce consumption.
Study on Control Technology of VSC-HVDC in AC System Fault Mode
Authors: Xue Min , Zheng Hui Ping , Song Shu Yong , Yang Wei Wei
Published: December 2014

VSC-HVDC is usually associated with the AC system, which will be inevitably affected by AC system.VSC-HVDC mostly operates in the environment of strong current and high voltage, which will lead some parts of internal device to be interfered or damaged.This paper studies the control technology of VSC-HVDC in AC system fault mode to ensure that the device itself is not only perfect but timely rescue the AC system when it is necessary.
Study on Flexible HVDC Transmission System Based on PSO-ADRC
Authors: Xue Min , Zheng Hui Ping , Song Shu Yong , Yin Chong Zhi
Published: December 2014

This paper expounds the control principle of active disturbance rejection controller (ADRC). The traditional flexible HVDC transmission system has a lot of disturbance factors and uncertainty,so Particle Swarm Optimization ( PSO ) algorithm is proposed to optimize the theory of ADRC which is used to design out-loop control system of flexible HVDC.The simulation results prove that control performance of system has been effectively improved .
Research on the Application of the Running Transformer Filtering Oil Device
Authors: Wang Qing Hao , Gao Zhen Guo , Chen Si Hui , He Xiao Bin , Liu Bo , Liu Chen Yang , Cheng Peng Fei , Li Si Min , Liu Peng , Xue Zhi Cheng
Published: December 2014

The key issue for the oil filter product sand operating status of the transformer oil filter, and in-depth research, based on the research and development of the transformer oil filtering device charged. Charged transformer oil filtering device structure includes an external oil circulation system, internal purification systems and automatic control and protection system of three parts. The device has also explained the conventional oil filter and oil filter charged two modes, when conventional oil filter modes election, workflow is identical with ordinary oil filter; If you choose to live oil filtering mode, you need to set the control variable range and start monitoring and adjustment, transformer oil filtering method has been put live field application, its efficiency and reliability of the actual verification.
Main Control System Design for Balanced Tension-Type Electronic Fence
Authors: Tang Zhi Jie , Liu Ping Long , Luo Qian , Ye Zhi Feng
Published: December 2014

Since the 1990s, with the defense, deterrence, alarm in one of the electronic fence system is gradually being widely developed in the field of public safety. The composition and control system design of a balanced tension electronic fence alarm system is described in this paper. This system has a balanced without fatigue characteristics, adapting to a variety of complex terrain environment and leaving no guard dead. It can be widely applicable to all establishments that have the perimeter guard need.
The Optimal Dispatch of LED Lamps Based on Gradient Projection Method
Authors: Deng Shu Lei , Xu Ming , Wu Jia Jie
Published: December 2014

With the rapid development of distributed generation technology,a lot of renewable wind and solar power connect to the power system. Due to the random and intermittent characteristics of renewable energy, it brings a big challenge to the security and economical operation of power system. With the limits of climbing speed, non-renewable energy generation units cannot respond quickly to the change in the output of renewable energy generation units. Owing to the advantages of high luminous efficiency and long lifetime, LED lamps get rapid promotion and application in the smart distribution network. Based on the optical and electrical unique properties of LED lamps, the author studies the effects on the power system for a large number of LED lamps connecting to the distributed generation system, and establishing the mathematical model of LED lamp participating in the optimal dispatch of distributed generation system. In order to solve the model, the author uses gradient projection method. Through the SIMULINK simulation, it demonstrates that the algorithm has a fast convergence speed and high precision, and verifies the correctness and feasibility of the algorithm.
Simulation of the Output Characteristics of Solar Panels Based on Simulink
Authors: Cai Hong Zhuan , Li Xiao Hui , Liu Jing Chao
Published: December 2014

This paper introduces the simulation model based on equivalent circuit and mathematical model of solar panels use matlab/simulink. The model can simulate the output characteristics of the solar battery board in different temperature and different light intensity. Simulation results close to the solar panels’ actual performance. This model offer convenience to build practical photovoltaic power generation system.
The Development and Application of 4G Mobile Communication Technology
Authors: Chen Hai Yan , Liu Wei
Published: December 2014

The paper makes an overall analysis on present exterior environment and telecom industrial status on the basis of full and accurate datum, and presents the status of 4G technology, the competition relations between 4G and other wireless technologies, overseas 4G service development and the successful experience in Korea and Japan. Then this paper points out that enormous profits and great opportunity still exist in China's mobile telecommunication market, and 4G has become more mature and been applied commercially in a large scale, the conditions of 4G development in China has also become mature.
Study on the Technology of Digital Image Processing
Authors: Li Wen Hui
Published: December 2014

The paper aims to study a design and technique of the image processing based on the architecture of embedded system. Aimed at the own characteristic of embedded system, designing a platform been endowed with more operating functions of embedded image processing with versatility. The author adopts the method of the embedded system design based on the basic functions and characteristic of image processing system, summarizing and comparing of the characteristic and new developments of the EOS for the ARM processor, and finally chooses the embedded Linux for the operating system of our platform, also transplant it in the hardware platform. Aimed at the characteristic of Linux device architecture, the author introduces how to develop the image capture and display, memory the data of an image, the programming method of that. Some base arithmetic of image processing, such as image smooth, sharpen, edge detect and so on, and the graphics user interface are developed on the platform with using the Mini GUI, according to the intercommunion between the human and the platform. At last, some key program's code is given.
High-Resolution Remote Multi-Spectral Sensing Images Based on Texture Features
Authors: Li Chen Ming , Zhu Li Qin , Wang Qiang , Sun Zhen , Huang Feng Chen , He Chen
Published: December 2014

Aiming at the difficulties in the segmentation for high-resolution remote multispectral sensing images, this paper proposed a segmentation approach for remote sensing images based on texture features. The algorithm implemented precipitation watershed transform respectively on the texture images obtained by the different characteristics of GLCM, and then superimposed the two segmentation results, finally completing the image segmentation by using a novel regional consolidation method that combined the texture features. The experiments were implemented on the high-resolution ALOS and SPOT 5 remote sensing images respectively. Compared with the traditional watershed segmentation approach based on gradient information, the experimental results showed that the proposed algorithm can accurately locate the edges of objects, effectively overcome the phenomenon of over-segmentation and under-segmentation, with a higher segmentation accuracy and stability.
Research on CFA-Based Method of Tomography
Authors: Zheng Yan Ping
Published: December 2014

Due to the artifact of classical image reconstruction algorithms in texture regions, this paper proposes an adaptive region demosaicking using Multi-Gradients. It first recovers green components according to the operators and the texture regions. Then the chrominance channels are reconstructed based on the interpolated green components and constant-hue rule. Experiments prove that this algorithm can improve the effectiveness from the subjective and objective.
Research on the Micro-Blog Public Welfare Communication on the Perspective of Harmonious Society
Authors: Chen Shuang
Published: December 2014

With the rapid development of the network, a new public welfare communication way has risen, that is micro-blog public welfare communication. The micro-blog reduces the threshold of the public participating the public welfare activities. Thus, everyone can take part in the public welfare communication.
Improved Threshold Function for Power Quality Disturbance Signal Denoising
Authors: Fan Xiao Long , Xie Wei Cheng , Sha De Lei , Li Yu
Published: December 2014

Mutation point feature of power quality (PQ) disturbance signals are very conducive to the wavelet-based detection and localization of PQ events, but the PQ signals are often disturbed by noise. In order to suppress noise and keep mutation points, an improved threshold function was proposed. According to the fact that the wavelet coefficients of signal and noise distributed on different scale, the threshold σj2lnk amended by to calculate threshold value for each scale adaptively. (k is the number of wavelet coefficients at level j). In simulation, four type of PQ signals and three degrading degrees are testing; meanwhile, four existing algorithm with wavelet shrinkage are performed for comparison. Results reveal that the proposed scheme not only suppresses noise of PQ signal well but also keeps the mutation points nicely.
Propagation Channel Modeling for Rayleigh and Rice Fading
Authors: Yang Yi Huai , Wang Li Fang , Li Yuan
Published: December 2014

An important requirement for assessing technology for wireless applications is to have an accurate description of the wireless channel. Rayleigh and Rice are the most popular models for wireless channels. In this paper, we simulation study the most important statistical properties, such as PDF and CDF, of Rayleigh and Rice channels, we also simulate the outputs of complex signals which passed the Rayleigh and Rice channels, and give some useful results.
Optimal Design of High-Speed Optical Fiber Communication System Spectral Efficiency of New Modulation Formats
Authors: Fang Zhou , Zhang Li Jia , Liu Bo , Wang Yong Jun
Published: December 2014

As human society to the information in the process of moving and growing demand for bandwidth communications capacity, the optical of new modulation formats increasingly attention and quickly play an important role in optical communications. How can the system bit error rate within a certain degree of stability while still maintaining high-speed long-distance dispersal system, has been a popular issue is the optical communications industry. Starting from the optical modulation format herein, the generation process of the system introduced various optical signal modulation format, the optical signal through the optical fiber was studied and the performance of the simulation, on the basis of the design of advanced optical modulation formats in an optical fiber communication system .
Image Segmentation of Pig Using Wavelet Modulus and Edge Growth
Authors: Yang Lei , Zhu Wei Xing
Published: December 2014

In order to segment the pig image accurately in the complex background, an image segmentation algorithm based on wavelet modulus maxima and edge growth is proposed. Firstly wavelet transformation to pig image was adopted to get local maximum value points in gray gradient, then local adaptive method was used to determine the segmentation threshold within local maximum points, and get the accurate edges. Secondly, the edge growth method based on gradient was used to link discontinuous edge points and complete the edges sealing repair. Finally, the mathematical morphology methods including connecting method and corrosion expansion operation were adopted to obtain the image area of a pig. The experimental results show that, in the complex background of piggery, the smooth and full pig image separated from background could be obtained by this algorithm. This method could improve the effectiveness of the image segmentation.
Analyse and Research on Motion Control for Helical CT Scanner
Authors: Yuan Gang , Zhang Yin , Xu Pin , Wu Zhong Yi
Published: December 2014

This study mainly focuses on the synchronization problems of whole-body CT scanner. A master-slave synchronous control method is used to achieve synchronism between the gantry rotation motor and the bed moving motor in helical scanning mode, while the cascade control method is used to enhance the stability of each motor. In order to keep synchronous control, a control law is designed by the eigenstructure assignment method, which insures the accuracy of the signal tracking of the periodic load disturbance during the dual-motor synchronous control, and eliminates the adverse effects brought by periodic load. The proposed algorithm is simulated on MATLAB, and compared with the traditional PID algorithm. In addition, the algorithm is implemented on ARM9 and evaluated on a realistic synchronization control experimental platform designed by us. Both the simulation and realistic experimental results indicate that the algorithm is feasible for helical scanning.
The Selection of Transmitter Elevation in a Ka-Band HAP-Based Communication System under Fog Attenuation
Authors: Zheng Jian Yun , Hai Niu , Zhu Yi Sheng
Published: December 2014

The Rayleigh approximation model is used for analyzing fog attenuation of the HAP-based communication system, the influence of transmitter elevation to fog attenuation under different temperature and liquid water density are studied, Numerical results show the optimum transmitter elevation angle in a ka-band HAP-based communication system under fog attenuation.
Slide - Mode Variable Structure Adaptive Control of Electro-Hydraulic Servo Systems Based on LuGre Friction Model
Authors: Guo Rui Juan , Du Shuang , Yin Hui Min
Published: December 2014

Electro-hydraulic servo system has more disturbance and noise factors at low speed than in other situations of the whole operating process, so the stability and performances of the system would be greatly affected by these factors. It is generally accepted that nonlinear torque disturbance is the main interference factor. In order to compensate above disadvantages, a sliding mode variable structure control was proposed to adjust the electro-hydraulic servo system. The results indicate that the provided approach possesses satisfactory performances in stability, robustness, steady state error and so on.
Design Analysis of Visual Illusion Application in Visual Communication
Authors: Li Suo
Published: December 2014

Visual illusion is a universal phenomenon that deviates from people’s conventional perception experience. Applying this phenomenon into design can exploit vast form innovation in visual field. This paper takes advantage of visual illusion to widen designer’s design thought. Especially, the special visual effects it generates can intensively simulate human vision and induce psychological association. Visual illusion embodies a sort of meaningful form as well as declares the various manifestation patterns of visual design itself.
Simulation Study on Network Dynamic Recognition of Movement Injury Risk Based on Computer Visualization Technology
Authors: Peng Gang
Published: December 2014

Because uncertainty and complexity of the athlete’s injury risk factors, the general risk method can’t reflect the risk of athletes. Based on Bayesian probability estimation method, this paper proposes a new evaluation system of athlete injury risk. Combined with the VB programming and visualization display function, it realizes visual evaluation function of athlete injury risk, and the injury level of athletes is divided into three warning levels. Finally through risk assessment system, we get the effect curve of athletes training number and training time on the injury. From the results we can conclude that the training time has a certain randomness injury to the athletes, and training times are decisive factors to some injury of athletes. It provides technical reference and data support for the risk assessment of injury.
Application of Digital Image Processing Technology in the Process of Ceramic Art Image
Authors: Peng Zan Bin
Published: December 2014

With the improvement of computer hardware and software performance, digital multimedia technology has been applied to various fields. The visual effect of ceramic art image is affected mainly by the brightness, texture and color, in which the image defects will affect the visual effect of the ceramic product. This paper designs the digital processing system of a new ceramic art image processing, the system can repair defects in ceramic art image. In order to verify the validity and reliability of digital processing system, the lead-free perovskite structure BZT based ceramics is prepared in this paper, and the use of electron microscope and digital camera take the ceramic products processing image with artistic defects, and then using VB programming digital image processing technology carries out color re coating for the ceramic, the ceramic products electron microscopy images after restoration will be obtained by the image boundary restructuring, which provides a new computer method for the processing art of the ceramic products.
Research on Positioning System Based on ZigBee Wireless Sensor Network
Authors: Jiang Li
Published: December 2014

Modern micro sensor has low cost, low power characteristic, it can realize the wireless communication and computing performance, a large number of the sensors organizations constitute the wireless sensor network. This paper realized the design of wireless sensor network positioning system based on CC2430 using Zigbee technology and RSSI ranging technology. Through the experiment test, the technology improved fixed position accuracy and resistance to environment base on RSSI calculate method.
Wind Tower Vibration Signal Analysis Based on EMD and KPCA
Authors: You Xi Cun , Wan Zhou , Li Yi Yang , Liu Hao Hua , Chen Zhuen
Published: December 2014

For the non-stationary vibration signals of wind tower, using a new method based on KPCA to eliminate the interference of the vibration signal. After cancellation noise according to the method based on EMD, the vibration signals are decomposed and the vibration characteristics of the signals are finally extracted. The experimental analysis indicates that this method can provide an effective reference for the health detection of wind tower.
Visible Light Communication System Based on RGB LEDs and Large Area Detector
Authors: Zhao Peng , Zhang Ming Lun , Lei Lei
Published: December 2014

In this paper, a new visible light communication system is proposed replacing signal lamp system on the boat. The new visible light communication system is demonstrated in 50m including RGB LEDs, lens and large area photodiodes. 153.6kbit/s data rate is achieved with infrared codes.
Comparative Analysis of Stress of Two Typical Micro-Displacement Control Platform
Authors: Tao Xian Chen , Shao Meng
Published: December 2014

This paper selects two typical micro-displacement control platforms,and conducts comparative analysis of strength of their flexible guiding mechanism.Stress expressions of flexible guiding mechanism are respectively derived to obtain the relationship between the maximum stress and geometric parameters and the relationship between tensile stress and bending stress.with moving the same displacement,the difference of stress of the two micro-displacement control platforms is small,and can be ignored.
Influence of Vibration on Stabilization Performance of Vehicle-Mounted Sighting Telescope
Authors: Jiang Wen Tao , Li Guo Zhang , Ren Guo Quan , Li Dong Wei
Published: December 2014

According to the effect of vibration on stabilization performance of on-board sighting telescope, a performance test analysis method is built based on the image of sighting telescope. The article mainly studies key algorithms of image pretreatment, median filtering and template matching in the process of image processing. The result indicates that vibration has significant impact on the stabilization performance of sighting telescope, especially for continuous aiming accuracy of different target. This research provides reference for the test and evaluation for the precision of vehicle-mounted sighting telescope stabilization.
A Kind of Design of Automatic Guided Vehicle Based on RGB Color Space
Authors: Hou Dong Liang , Feng Xiao Lin
Published: December 2014

Automatic Guided vehicle (AGV) can free drivers from boring work. Previously AGV guided by black conduction band, as the color is single, it can only used for a kind of vehicle navigation.When there are several kind of vehicles need to be guided, the black conduction band becomes powerless. Color conduction bands can overcome this problem. Usually RGB image should be converted to other image space, and then identified the bands,but it costs lots of time. This paper proposes the design of AGV and intruduces the hardware, also proposes a quick recognition method which can be used in RGB color space. It effectively improved the recognition speed, and realized real-time identification.
Research on Indoor Pedestrian Positioning System Design Based on User Behavior Perception
Authors: Ding Dong Dong
Published: December 2014

With the development of computer and embedded technology, ubiquitous computing age is coming. In the ubiquitous age, people could get all kinds of services anywhere and at any time. In this paper, we design an indoor location system based on ultrasonic sensor and radio frequency technology. The ultrasonic positioning technology has many merits of high positioning accuracy, simple circuit structure and low cost. There are some components such as locating system, communication system, location system, security system and so on, emphasized supporting technologies in order to provide researchers with general cognition. The principle and the design of the system are described in detail. The system consists of the single chip circuit, the circuit of ultrasonic, the circuit of radio frequency signal, communication interface circuit and so on. Perceptual system can promote environmental intelligence and human services development, but also can promote public places security monitoring and early warning intelligence and automation.
Research on Integrated Information Service of Telecom Operators in EVC
Authors: Yang Meng Ke , Zeng Jian Qiu , Khuhawar Khizer Hayat
Published: December 2014

Full-service operations competition is going on among Chinese telecom operators. How to offer integrated information service and acquire competitive advantage has become a new research topic. So this paper focuses on the integrated information service, proposes the eco-industrial value chain oriented view for telecom operator and builds the model of integrated information service quality based on SERVQUAL to help China telecom operators make the integrated information service strategies and tactics in dynamic eco-industrial value chain.
A New Target Detection Method Based on Multiple Jamming Cancellation Algorithm
Authors: Zhang Qi Liang , Wang Xiao Bo , Xie Jun Wei , Lu Wen Kai , Zou Hong Xing
Published: December 2014

This paper proposed a target detection method in the presence of multiple jamming, which may come from mainlobe or sidelobe of the array antenna. The jamming direction-of-arrival (DOA) is estimated using MUSIC algorithm, and a multiple jamming cancellation beamformer is suggested, which is based on a FIR filer in space domain, the beamformer is followed by a pulse compression filter in frequency domain which can improve the resolution in time domain. We take a simulation experiment for our method, considering a digital array radar with pulse compression technique, the experiment indicate that the target detection method have a good performance and can be used in digital array radar system.
A Facial Recognition System Based on Integral Image
Authors: Zhang Wei Xin , Bai Wei Bing , Xu Chao , Chen Wei Yuan , Jiang Rui
Published: December 2014

This article made a in-depth research of the face detection with the method of integral image, which is based on image capture and recognition technology, and designed the hardware circuit and software program development framework. Designed hardware circuit platform around the Cortex-A8 core processor in hardware, which was exclusively for the camera driver, face recognition and image capture. Prorammed face detection code with QT, and finally transplanted the face detection program to ARM board. Results show that the system has a high identification rate correctly and a good real-time performance under normal lighting conditions after a certain sample size of the test.
A De-Noising Method for GPR Signal Based on EEMD
Authors: Gan Lu , Zhou Long , Liu Shan Mei
Published: December 2014

Aiming at the de-noising of GPR echo signal, a de-noising method based on EEMD and wavelet is presented. First the echo signal data is processed with EEMD and yields IMF components. Then the IMF components which indicate noise are subtracted. Next, the high frequency IMF components of the remaining are subjected to wavelet threshold. Finally, the signal is reconstructed using the de-noising IMF and low frequency IMF to realize signal de-noising. Compared with other commonly used methods, EEMD-wavelet method has improvement on SNR. The experiment results show its effectiveness and feasibility in GPR de-noising.
An Algorithm Based on Compound Anisotropic Diffusion for Image Denoising
Authors: Shen Min Fen , Su Zhi Fei , Chen Ting Ting , Sun Li Sha
Published: December 2014

In this paper we present a compound anisotropic diffusion filter algorithm to apply edge sensitive ICOV operator in NCD model. According to the correlation coefficient of the ICOV operator, we obtain effective nonlinear denoising. The experiment have validated that our algorithm have better effect in smoothing and better ability in edge preservation.
Study on the Resonance Amplitude of Bending-Torsion Coupling Vibration
Authors: Guan Zhuo Huai , Miao Wen Jun
Published: December 2014

When rotor exist eccentricity, there will be mutual effect between bending vibratory and torsion vibration. This kind of mutual effect will generate bending-torsion coupling vibration. At present, the majority research on the bending-torsion coupling vibration are focus on the nonlinear characteristics, but seldom on the coupling resonance amplitude of the bending-torsion coupling vibration. Given this situation, this article starts with resonance amplitude have further research on the bending-torsion coupling vibration. Firstly, a model of eccentric rotor with coupled bending and torsion vibrations was built and the vibration equation was solved by small parameter method. Then considering the forcing frequency and dynamic tress of the existing equipment can provide,the main resonance of bending-torsion coupling vibration stress relief was determined, and the mechanism of bending-torsion coupling vibration stress relief was put forward. Finally, the example demonstrated the theoretical analysis. The research provide thought and basis for the bending-torsion coupling vibration.
Swimming Teaching Effect Analysis Based on the Underwater Video Acquisition System
Authors: Liang Yuan
Published: December 2014

During the 1990s, with the rapid development of science and technology, the human production and working mode or life-style have the huge transformation. In the sports field, researchers and teachers have the aid of modern science and technology resources to improve various teaching methods , which do help to master the technical action and improve the sports level. In the practical application, these teaching methods is more effectual than conventional method in sports skill learning. Use exploratory study method to develop a suitable and low-price underwater video acquisition system for daily swimming teaching, which is also easy to be operated. The system is with the aid of underwater surveillance cameras to realize the technology of underwater swimming action film and real-time looked, and through the acquisition card timely playback and slow play function to intuitive realistically restore underwater technical movement dynamic change process. This research use the teaching experimental method,mathematical statistics and comparative analysis and so on, the students make two sets of different teaching contrast experiments, verify the effect of the underwater video acquisition system. Underwater video acquisition system in swimming teaching application, change the teacher explain demonstration and strengthen the students single teaching mode, formed by means of image data timely feedback video feedback teaching method.
Satellite Navigation System Positioning Research Based on Pseudo Linear Kalman Filtering Algorithm
Authors: Huang Qi Lai , Li Wei Bo , Gong Zheng , Wang Han Li
Published: December 2014

At present, with application scope enlargement of GPS, traditional positioning method can't meet the growing performance requirements more and more. So kalman filtering theory is applied to national defense and civil enterprise in satellite navigation and it has very important significance.
Accuracy Improvement of Pedestrian Counting Based on Harris Corner Point
Authors: Liu Fang Ming , Zhou Ren Yun
Published: December 2014

The demand for automatic counting of pedestrians at event sites, buildings, or streets has been increased. Existing systems for counting pedestrians in video sequences have a problem that counting accuracy degrades when many pedestrians coexist and occlusion occurs frequently. In this paper, we introduce a method of clustering optical flows extracted from pedestrians in video frames to improve the counting accuracy. The proposed method counts the number of pedestrians by using pre-learned statistics, based on the strong correlation between the number of optical flow clusters and the actual number of pedestrians. Furthermore, we compare the performance of two algorithms that use Harris corner points and lattice points when optical flows are detected. We confirm that the counting accuracy using feature points is higher than that using lattice points especially when the number of occluded pedestrians increases.
Internet of Things System Optimization Design of Logistics Based on Improved LEACH Algorithm
Authors: Lu Xing Hua
Published: December 2014

In the logistics system, the Internet of things information transmission problem is researched. The ZigBee, 3G technologies are fused in the radio frequency identification (RFID), a set of logistics networking platform is designed based on 3G-ZigBee, with the functions such as multipoint automatic identification, real-time positioning, wireless network and RFID. The logistics system is designed, the routing algorithm of logistics system is analyzed, the improved LEACH algorithm is proposed, the NS component is used for the simulation analysis. Through the simulation results, the best balance point between energy consumption and network density is obtained, the parameters of the logistics system are optimized. Finally, software design idea and workflow are presented, the purpose of the remote control is achieved.
Adaptive Polarization Mode Dispersion Compensation with DPSO Algorithm
Authors: Ding Xiu Ling , Yuan Xue Guang , Zhang Jin Nan , Zhang Yang An
Published: December 2014

Dithering particle swarm optimization (DPSO) algorithm is introduced into adaptive polarization mode dispersion (PMD) compensation in optical communication system. The DPSO algorithm has the merits of rapid convergence to the global optimum, without being trapped in local sub-optima, and good robustness to noise. How to implement DPSO as a component of a control algorithm in adaptive polarization mode dispersion compensation is described. Performance comparisons between PSO and DPSO were carried out theoretically and experimentally.
Design of a Wide-Band Double-Ridged Standard Horn Antenna
Authors: Liu Long , Li Yong , Zhang Shen Ke
Published: December 2014

This paper will present a novel wide-band double-ridged standard horn antenna at 0.5~6GHz with the software named Ansoft HFSS, which is mainly used for far-field antenna measurement system. A simulation model of wide-band double-ridged horn antenna and the detailed design of each part of the structure will be given. With optimization in HFSS, the results show that the VSWR in the whole frequency band is below 2.4 and average gain larger than 6 dB. Finally, results of the measurement for VSWR, gain and radiation pattern are presented and discussed, which indicates that the built prototype is consistent with the design goals very well.
Hovering Control Based on Buoyancy Control Approach for Under-Actuated AUVs
Authors: Liu Bao Gen , Ye Yu Ling
Published: December 2014

A buoyancy control system was presented to realize the powerless descent/ascent motion for an under-actuated AUV like REMUS. The sea water was injected into or drained out of the pressure water tanks to tunes the residual buoyancy of the vehicle, and the buoyancy control was realized. An engineering hovering control law based on buoyancy control approach was proposed to keep the vehicle hovering at the programmed depth. The injection and drainage instructs were worked out only based on depth data and its difference, so the hovering control system need not additional sensors. The simple and reliable hovering control system was applied to a type of huge under-actuated AUV, and the experiment results show that it is feasible.
Design and Simulation of a Wide-Band LPDA
Authors: Wang Si Hao , Li Yong , Zhang Shen Ke
Published: December 2014

A reconfigurable wideband Log-Periodic Dipole Array (LPDA) is here in introduced. Built utilizing low cost it can cover frequencies from 0.2GHz to 2GHz, through the discrete adjustment of its elements. The gain of antenna in a given frequency band of operation can also be changed by the reconfiguration of its elements. The design, construction and testing processes are discussed and a performance analysis is made based on computer simulations. In this paper simulation software HFSS is used to get the optimization design of LPDA, and the simulation results are agree with the experimental dates appropriately.
Research of a Variable Rate Real-Time Optical OFDM-PON Access System Based on Oversampling
Authors: Shi Yue Qi , Zhang Li Jia , Liu Bo , Zhang Qi , Wang Yong Jun , Tian Qing Hua , Yin Xiao Li , Xin Xiang Jun
Published: December 2014

This paper studies a variable rate optical Orthogonal Frequency Division Multiplexing Passive Optical Network (OFDM-PON) real-time access system model, using the signal processing method of oversampling. The basic principle of the model is that the access system uses different oversampling rates according to the allocated bandwidth to different Optical Network Units (ONUs), ensuring that the entire system can utilize the existing hardware conditions to maximum effect. The proposed system uses Xilinx V5 FPGA to generate real-time OFDM signals. MATLAB software is used to recover the signals and calculate the bit error rate (BER). The simulation results are presented and analyzed to verify the performance of the system.
Improved Particle Filter
Authors: Wang Tian
Published: December 2014

For the particle filter, the paper proposes an approximate algorithm for the case of unknown measurement noise and make a comparison between EKF algorithm and the approximate particle filter for estimating trajectory in a bistatic radar system. Simulation results show that the advantage of the particle filter and theavailability of the approximate particle filter.
The Design of Radar Intermediate Frequency Echo Simulator
Authors: Ding You  Hua , Zhang Peng , Xia Han Ao
Published: December 2014

This paper has introduced a kind of method which can simulate the echo signal of radar receiver by the use of the Digital Radio Frequency Memory (DRFM) and Programable Logic Device (PLD).With the realization of actual circuit,the echo simulator can produce intermediate frequency and video signals.Therefore,with the help of the echo simulator, we can raise the detection ability of radar receiver system considerably. The structure of the simulator is simple but its function is great.The echo simulator can simulate intermediate frequency signals of radar receiver system for the first time.So the simulator can locate where isn’t work well of the radar receive system.
Motion Compensated Temporal Filtering in Scalable Video Coding Algorithm
Authors: Hu Shun Xing , Zhang Hong Tao
Published: December 2014

the temporal correlation exists between the frame and the frame in a video message, in order to solve temporal redundancy.This paper adopts motion-compensated temporal filtering method for removing temporal correlation, motion-compensated temporal filtering and Haar wavelet lifting techniques are studied and discussed; finally presented the improved motion compensated temporal filtering methods. Results show the new method improves coding efficiency and scalability.
The Application of Three-Dimensional Terrain Modeling Based on GeoTIFF Supported by Creator
Authors: Peng Xi Zhe
Published: December 2014

Large area real terrain modeling is the key technology in visual simulation system. This thesis discusses the terrain modeling technology based on the GeoTIFF data, which transform the GeoTIFF data to DEM using the Global Mapper. And then, the three dimensional terrain models are established through Creator environment, the real terrain modeling is implemented quickly.
Algorithm of Noise Reduction for Adaptive Dictionary Learning Research Based on Brain MRI Images
Authors: Miao Jia Qing
Published: December 2014

Recent years, the image sparse representation has been the popular method in the study of image representation, which has put forward a new idea in the image denoising. Its basic principle is that the original image has the sparse representation under the proper over-complete dictionary. Filter out the noise, we should find out the sparse representation of the image through the design of the dictionary. Its mechanism is that one hand the useful information of the image would be effectively expressed because of the sparse decomposition algorithm based on the redundant dictionary. The other the noise would not be expressed through the dictionary atoms. We do the image denoising according to the image sparse representation. Because of the superiority of the adaptive dictionary algorithm in the image, in this paper, we discuss the over-complete dictionary training algorithm. And we prove the effectiveness through the MATLAB.
Solutions of Broadband RCS Using AWE Technique and Equivalent Dipole Moment Method
Authors: Yang Ming , Wang Zhong Gen , Zhou Jin Zhi
Published: December 2014

A broadband radar cross section (RCS) calculation approach is proposed based on the asymptotic waveform evaluation (AWE) technique. The equivalent dipole moment method (EDMM) is used to accelerate the process of filling the impedance matrix and more derivative matrices. So the broadband RCS is achieved quickly by using AWE technique and EDMM. Numerical results show that the computational efficiency is improved significantly by using the method presented in this paper with ensuring the accuracy.
Study on Shannon Source-Coding Theory
Authors: Yan Shan Jun
Published: December 2014

This pape analyzed the essence of Shannon source coding theory, and put forward the concept of utilization rate of source symbols, then by using this concept a new description for lossless source coding theory of Shannon was gave, from a new perspective the essence of Shannon source coding theory was identified.
Design of Online Energy Assessment System for Pump Unit
Authors: Luo Yin , Sun Hui , Lu Jia Xing , Yu Zhi Shun
Published: December 2014

An online energy assessment system for pump unit is designed in this paper, which is mainly utilized in both energy consumption measurement and energy assessment of pump units.[1,2]The system could offer reasonable advisory opinion about pump and motor energy-saving. If a certain power plant is reformed on basis of the recommendation of this system, the energy of 491000 kWh could be saved while 393600 yuan will be economized, which has excellent energy-saving effect.This system is well worth spreading to national wide to bring enormous economic and energy benefit every year.
The New Program and Challenge of Upconversion Materials
Authors: Wang Yong Jun
Published: December 2014

Preparation technology and measurement technique have get a great achievement in recent years,that lead to the rapid development of upconversion materials.Some of them achieve a higher fluorescence intensity,or get good hydrophily becase of the application of new type of coupling agent.This would help UCNPs closer to the final goal of business application in Solar Cell, biological fluorescence detection,and optical storage.In this paper,I have introduced the basic conception,luminous mechanism, preparation method of UCNPs,and analyzed the different method could bring what special advantages to them in themself’s specific application field.
Analysis on the Structure and Performance of Austenitic Stainless Steel Cladding Layer
Authors: Ding Xiao , Wang Zhi Ling
Published: December 2014

MIG welding overlaid austenitic stainless steel on low alloy Q345B. The overlay cladding comprises a transition layer and corrosion resistant layer. Overlaying specimens of transition layer with different thicknesses were prepared. The mechanical properties of joints were tested by micro-hardness, bending test and other methods. The results showed that the mechanical properties of specimen with ER309L welding wire as transition layer did not have splitting phenomena after being bended. There were no cracks. However, the specimen without transition layer had small crack or tiny cracks. When the transition layer thickness is changed, the performance of overlay cladding is essentially unchanged. The organizations of overlay cladding in four groups of specimens are similar, which are composed of austenite and ferrite, and ferrite was mostly distributed in strips and blocks.
Electrical Properties of Electrospun Flexible and Stretchable PVDF/PANI Nanoropes
Authors: Han Wei Hua , Wan Yong , Sun Bin , Long Yun Ze , Chang Qing , Yuan Feng , Xu Sheng
Published: December 2014

Aligned poly (vinylidene fluoride) (PVDF) nanofibers and the nanoropes have been fabricated via a novel electrospinning technique. And then conducting polyaniline (PANI) was coated on the surfaces of the nanoropes using an in situ chemical oxidative polymerization method. It is found that the conductivity increased drastically at first and then tended to be saturation in the polymerization process. In addition, the flexibility and stretchability of the composites have been measured: With an increase of bending curvature and tensile strain, the conductivity rose at the beginning because the fibers among the nanoropes get tight; and then the conductivity dropped, which may due to the PANI layer broke and becomes discontinuous with the adding stress.
Weak Transient Magnetic Fields Detecting in Thermomagnetic Effect Study of Polymer Material Deformations
Authors: Chen Sheng Ming , Luo Ying She , Su Jian Xin , Zhang Yong Zhong
Published: December 2014

A self-developed magnetic detector is presented, which is made up with 64 Hall sensors assembled as an 8×8 serried array in a 50×50mm quadrate circuit wafer, to catch a weak transient magnetic field. The disadvantage accompanying with compact design is the sharp rise of sensor’s working temperature due to the power consumed is on increasing. An approach in which the 64 Hall elements are connected as a three dimensional magnetic-pixel matrix and are driven by dynamic power is presented. The homologous hardware correction illustrative diagram is provided, including its measuring principle and multivariate calibration technique. The experimental results indicated that the proposed method is a beneficial exploration for sensor power supply.
The Application of Carbon Fiber Materials in Sports Equipment
Authors: Chen Yan Yan
Published: December 2014

Carbon fiber materials are not only widely used in aerospace, automotive and other industries, but also develop one of the best sports equipment selection. Elaborated by typical examples, this paper introduces the carbon fiber material used in the game of high-tech equipment and indicates that this material greatly promoted the improvement of sports performance. Carbon fiber materials have become one of the new materials which are essential for the development of modern sports equipment.
The Application of the Macromolecule Materials with High Mechanical Properties in Competitive Sports
Authors: Yin Tian Tian , Gao Lang
Published: December 2014

Competitive sport is such a sport, which is pursuing higher, faster, stronger and more accurate and which is challenging athletes individual and human’s movement limit. Macromolecule materials with high mechanical properties have the characteristics of higher strength, elasticity and toughness. This paper is planned to study the application of macromolecule materials with high mechanical properties in competitive sports.
Study on Thermal Stress Alleviating Technology of Diesel Exhaust Manifold
Authors: Li Zhe Kun , Zhang Wei Zheng , Song Li Ye
Published: December 2014

The study calculated and analyzed the distribution of thermal stress on exhaust manifold of one 8V diesel exhaust system. To solve the problem of high local thermal stress on the exhaust manifold, the effect of using hollow flange structure, reducing cylinder head stiffness and slotting has been studied.