bluuebunny/crossref_metadata_2025 huggingface dataset:
Portable Monitoring Instrument Based on ARM and LINUX
Authors: Ma Ming Kun , Zhang Jia , Chen Jun , Liu Dong Hui , Yang Geng Huang
Published: July 2013

Man-machine interface (Human Machine Interface, HMI) is known as the man-machine interface, which is the transmission of information between human and computer media.And it plays an important role in computer system design. Man-machine interface as an independent field of study is pay attention to the world widely. From the perspective of the development of computer technology, man-machine interface guide the development of the related hardware and software.
XVL Based Study on 3D Virtual Product Display System
Authors: Hou Shou Ming , Sun Qian
Published: July 2013

Along with the network technology and virtual reality technology development, the enterprise product display mode is changing from the traditional two-dimensional way to greater competitiveness of three dimensional display mode. In the current 3D display system, almost every kind of model all need a specific display plug-in which makes the system cant be in common use. Based on the study of the XVL technology, this paper uses the XVL in data conversion advantage to solve the system generality problem,and combine with 3D rapid modeling technology, XVL interactive technology to develope a 3D product display system which is suitable for rapid development and has strong commonality and strong interaction.
Automated Calibration System for IMU Based on Database and LabVIEW
Authors: Deng Yan , Xing Chao , Zhou Bin
Published: July 2013

The calibration of Inertial Measurement Unit (IMU) is the premise of inertial navigation. It includes series of test items, takes a long time, and requires lots of data transferring and calculating operations. Traditional manual method is difficult to ensure its reliability and efficiency. This paper presented an automated IMU calibration system with three layers: the test hardware devices, the calibration software and the calibration database. Calibration software controlled the tests running in the temperature box, on the turntable, vibration table and marble horizontal table. Calibration database stored the test data and calibration parameters. Through the LabVIEW aided database technique, the system not only completed all the test items but also integrated and simplified the calibration procedure. The verification test results showed that the system improved the calibration efficiency and enhanced the calibration reliability greatly.
Design in Agilent 3458A of Synchronous Measurement System Based on VB 6.0
Authors: Zhang Huang Hui , Lin Fei Peng , Shao Hai Ming , Lv Dan , Li Wen Feng , Jia Kai
Published: July 2013

This paper researches synchronous measurement system with digital meters Agilent 3458A based on Microsoft Visual Basic 6.0. In this system, two digital meters connect to PC by USB/GPIB bus and arbitrary waveform generator 33220A provides external trigger signal to the digital meters. Based on these, we have developed the synchronous measurement software, which can facilitate the realization of automatic measurement and improve measurement efficiency. The measurement method can overcome effect of high voltage power supply ripple and drift as well as decrease type A uncertainty more than 100 times especially in the measurement of voltage divider ratio.
The Design of Wireless Monitoring Network Nodes Base on the JN5121
Authors: Zhang Yan Jie , Wang Xue Yong , Zhou Hong Suo
Published: July 2013

This article introduces the design of wireless monitoring network nodes base on the JN5121 and the basic software programming with the use of API function provided by Jennic Corporation. It can realize the mesh network, multi-hop transmission, dynamic management of network and adapt to the position change of monitoring sites. The sensor nodes which use batteries to supply power take the sleeping mechanism and message-routing optimization to reduce and balance the power consumption.
A Method on Underwater Extremely Low Frequency Atmospheric Noise
Authors: Feng Shi Min , Zhou Sui Hua , Zhang Hong Xin
Published: July 2013

On the basis of low-pass characteristic of the ocean in extremely low frequency (ELF) band , which makes the atmospheric noise distort and signal to noise (SNR) of the receiver worse, magnitude-frequency and phase frequency characteristic of the ocean in ELF band were researched. Influence at different depth of the ocean on the atmospheric noise was simulated and frequency compensation filter was designed with the best uniform approximation method to compensate the distorted atmospheric noise. With the sampling frequency fs=1KHz, at 30m~200m depth, no more than 9th-order IIR filter was used to design frequency compensation filter. The maximal error of the magnitude-frequency characteristic of the designed frequency compensation filter is less than 0.5dB compared with the theoretical. With the filter, the sharpness of the ELF atmospheric noise spikes are restored and the SNR of the receiver is improved.
Study on Precision Selection of Instrument Transformer and its Calibration for Automatic Test System
Authors: Wang Bo , Zhao Hai Sen , Lian Shou Jun
Published: July 2013

System accuracy is an important assessment indicator for automatic test system, which is influenced by many factors such as instrument, person, and environment. The paper takes a set of automatic motor testing system for an example, the mathematic relationship between the system accuracy and the precision of instrument transformers was analyzed, which also provides a theoretical reference for the precision selection of instrument transformer when the system accuracy was known. Some improved measures such as the selection of measuring point and the calibration of transformer ratio and phase angle are put forward. Testing results verified its simplicity and efficiency, besides the novelty above, the paper also provides a new idea to improve the system accuracy of constructed test platforms without increasing the cost for exchanging a matched transformer.
The Study on the Automatic Drying Machine of Spinneret Based on PLC Control Technology
Authors: Fu Hui , Zhao Qian Cheng , Yang Chong Chang
Published: July 2013

Spinneret cleaning technology is introduced in this paper. For the status of the actual production of low-efficiency, high-intensity artificial drying of the spinneret, an automatic drying process of spinneret is studied and an automatic drying machine of spinneret is studied based on PLC control technology. An experiment is conducted for the prototype of the automatic drying machine of spinneret. The experiment shows that the work efficiency of the drying machine is more than 3 times of the artificial drying and working a low noise environment is achieved.
Research and Realization of Hardware Back-Propagation Neural Network Based on FPGA
Authors: Guo Fei , Luo Xiao
Published: July 2013

In order to meet the requirements of real-time and embedded of industrial field, a reconfigurable Back-Propagation neural network based on FPGA has been implemented on Xilinx's Spartan-3E (XC3S250E) chip which has 250000 gate. First the optimal network structure and weights were gotten by a variable structure of BP neural network algorithm. Then an improved hardware approaching method of excitation function was put forward, and the maximum error was 1.58% by simulation and comparative analysis on the error. Finally hardware co-imitation and timing simulation was token based on a reasonable choice of data accuracy, and then the hardware BP neural network algorithm was been downloaded and implemented on FPGA. This method has better accuracy and speed, it is an effective method of BP neural network modeling based on hardware, and lays the foundation for the hardware realization of other neural network and embedded image processing.
Power Monitoring System Based on LabView in the Application of Intelligent Building
Authors: Wang Jing , Wang Pei
Published: July 2013

In the intelligent building, the existing power supply and distribution monitoring system is mainly monitoring the voltage, current, power factor and other parameters of power supply equipments, lack of power quality monitoring, analysis and graphical display. In order to improve the power supply and distribution monitoring system in the intelligent building, this article designs a power monitoring system based on LabView, to monitor and analyze the basic parameters, harmonic, three-phase imbalance degree of power supply and distribution.
Design and Application of the Deviation Automatic Measurement System for Tower Frame of Cable Crane
Authors: Cao Guang Min , Qiu Fa Ju , Shang Wei Yan
Published: July 2013

An automatic measurement system used on deviation measurement of the cable crane tower has been designed, and the development ideas and the key codes have also been given. Then by experiment, it has been improved that the system has overcame the shortcomings of low efficiency and high labor intensity existed in the previous manual targeting, and measurement errors have also been reduced by the automatic measurement system. Based on the above advantages, the system has a high application value and promotion prospects.
A Method for Thickness Control of Aircraft Structural Parts with Thin Webs Based on On-The-Machine Measurement
Authors: Peng Yu , Mou Wen Ping
Published: July 2013

Pockets are widely applied in the design of the aircraft structural parts. For achieving aggressive weight targets, pockets are always designed by thin walls and webs. When machining a pocket, the web is created at the face of the end mill, as opposed to ribs, which are created at the periphery of the end mill. However, difficulty exists for control the thickness tolerance when machining these thin-webs. In this paper, the on the machine measurement technology is adopted to help control the thickness accuracy of thin webs. A typical part is taken to illustrate the proposed method and test results show that the proposed method efficiently improves the machining accuracy of thin webs.
3D Measurement Method of Underground Displacement Based on Hall and MR Effect
Authors: Zhou Zhen , Li Qing , Li Xiong , Tong Ren Yuan , Shi Ge
Published: July 2013

When the cylindrical NdFeB magnet was magnetized along the axle wire, the magnetic field around the magnet was symmetric about the axle wire. The output voltage of Hall sensor was proportional to magnetic induction induced by itself. Around the magnet, the magnetic induction component along the axle wire could be measured by Hall sensor. The contour line and contour surface of magnetic induction could be plotted by MATLAB. A sensor array was composed of three Hall sensors in triangular distribution, and 3D Cartesian Coordinate System was established. 3D coordinate of magnet can be measured with this sensor array based on contour surface. Underground soil deformation will change the relative position of sensor array and magnet. The size of geotechnical displacement can be calculated after getting the new 3D coordinate of magnet. Along with dual-axis magnetic sensor based on MR effect, the orientation of geotechnical displacement can be measured, and so able to measure the underground displacement.
Study of Deformation in the Active Region of GaAs/GaAlAs Laser Diodes
Authors: Wu Jin Ling , Wang Xin Nian , Yuan Lan Dang
Published: July 2013

The paper presents an investigation of deformation in the active region of GaAs laser diodes under operating conditions.Since the properties of bulk material and manufactured diode are not identical,a study of the spectral splitting and polarisation changes caused by mechanical stress in the diode is made.These results are used to calibrate instruments for a study of the deformation due to thermal stress in the diode under operating conditions.This thermal stress can exceed the shear stress required for dislocation motion in the active region of the diode.
A Novel Method for Azimuth Estimate of Ultra Short Base Line Positioning System
Authors: Zhang Ju Cheng , Sun Da Jun , Han Yun Feng
Published: July 2013

Azimuth estimate is easily affected by noise and multipah during acoustic transmission in Ultra Short Base Line (USBL). To solve this problem, a new array with eight hydrophones and signal processing method are presented and analyzed. With the help of redundant hydrophones, various results could be obtained. Compared with the standard deviations of various results, correct one would be picked out. Lake experiment proved that wrong azimuth estimate was effectively eliminated and the positioning performance was improved.
Liquid Level Measurement System Design Based on Laser Displacement Sensor
Authors: Liu Wei Na , Xu Wen Bo , Yang Li Feng
Published: July 2013

In order to improve precision, outdated measurement method, complicated structure and weak anti-jam ability in liquid level measurement, a set of liquid level system was designed with the core of high-precision laser displacement sensor. The system adopted non-contact laser trigonometric survey method and powerful virtual instrument techniques. It could conduct online and real-time measurement to infinitesimal displacement on liquid level with high speed and precision. Through measurement experiment, its accuracy and practical applicability is verified.
The Design of Borehole-Surface Networked Oil-Water Interface Resistivity Imager Receiver
Authors: Sun Han , Li Zhen Feng , Han Bing
Published: July 2013

The borehole-surface networked oil-water interface resistivity imager receiver which is in-depth research and designed in the thesis bases on the borehole-surface resestivity method.The text recommended a few hardware and the software constitution of module. The main function of every module is set forth in detail.These include the kind of system error and its calibration and principle calculation,the best way to weak low frequency signal conditioning,synchronization technique that the system applied.
Optimization Research for Receivers Arrangement of LBL Acoustic Positioning System with PSO Algorithm
Authors: Xiao Chang Run , Zhang Wen Zhao
Published: July 2013

Three optimization models were proposed according to the problems emerged from self-propelled model test. And the object function to evaluated acoustic positionings precision of some given receivers arrays was created. The genetic algorithm code to solve this optimization problem was developed and validated by optimization model 1 afterwards. The optimum arrangements for model 1 and model 3 were acquired by calculating such code. The cross arrays was certificated to be the optimum ones. One new method to arrange acoustic receivers in self-propelled model test was drafted.
Design of Data Acquisition System for a Certain Type of IR Seeker
Authors: Zou Wei Hua , Wu Ji Lin
Published: July 2013

This article describes the design of a high-speed data acquisition system which can record 11 channels data of a certain type of IR seeker in interference tests between IR seeker and infrared decoy projectiles. This system adopts PC104 embedded computer to form a small and ruggedized data acquisition system which can be used for the ground tests data acquisition and can be installed in a certain type of flight training missile for the air tests.
An Anomaly Detection and Correction Method Based on Measurement Representation Model
Authors: Zhu Wei Kang , Li Hui Fen , Mu Jun Shan , Xue Guo Hu , Dai Zheng Xu
Published: July 2013

Tracking data containing outliers would seriously distort the accuracy of data processing for space tracking ships. Effective measures have to be adopted for the detection and correction of outliers. The time series of observations obtained by space tracking ships contain complex periodical elements caused by ship deformation and rolling. It brings difficulty to the detection of outliers. To solve the problem, a variety of detection methods were studied based on measurement elements representation model. The paper gives an analysis about the characteristic of measurements taken by the ships and proposes to detect the information about outliers by considering the correlation in time, space and data properties. A detection model based on spline function representation model is constructed and tested. Numerical results show that the proposed method can detect and correct outliers effectively, and provide an alternative to the current method of the measurements processing for the space tracking ships.
Doppler Shift Elimination Method Based on Instantaneous Frequency Estimation for the Wayside Acoustic Signal
Authors: Hu Fei , Shen Chang Qing , Liu Fang , Zhang Ao , Kong Fan Rang
Published: July 2013

The phenomenon of Doppler Shift leads to the difficulty for fault diagnosis of train bearings with a high moving speed. So the elimination of the Doppler shift should be implemented firstly. A Doppler Shift elimination method for the wayside acoustic signal is proposed. The instantaneous frequency estimation based on STFT was applied to attain the IF vector. According to the acoustic theory of Morse, the data fitting was then carried out to achieve the fitting IFs, with which the re-sampling sequence could be established to eliminate Doppler Shift. To demonstrate the validity of this method, an experiment with the synthetic signal containing several frequency components had been carried out. The results show that the re-sampled signal was revised without Doppler Shift.
Rolling Bearing Fault Degree Recognition Based on Ensemble Empirical Mode Decomposition and Support Vector Regression
Authors: Shen Chang Qing , Hu Fei , Zhu Zhong Kui , Kong Fan Rang
Published: July 2013

The research in bearing fault diagnosis has been attracting great attention in the past decades. Development of feasible fault diagnosis procedures to prevent failures that could cause huge economic loss timely is necessary. The whole life of the bearing is also a developing process for some sensitive features related to the fault trend. In this paper, a new scheme based on ensemble empirical mode decomposition (EEMD) and support vector regression (SVR) to conduct bearing fault degree recognition is proposed. This analysis first extracts the sensitive features from the intrinsic mode functions (IMFs) produced by EEMD which is a potential time-frequency analysis method, and then constructs an intelligent nonlinear model with input feature vectors extracted from the IMFs and defect size as output. Through validation of experimental data, the results indicated that the bearing fault degree could be effectively and precisely recognized.
Duty Ratio Thresholds for Regular Transmission at Human Tissue of Near-Infrared Square-Wave Pulse
Authors: Wang Jian , Li Shuo Guo
Published: July 2013

In order to understand the transmission mechanism at human tissue of near-infrared square-wave pulse (NIRSP), an experimental study of the duty ratio threshold for regular transmission at the fingertip and palm of human hand by NIRSP was carried out by using a couple of simple transmitting and receiving device with tunable duty ratios, and also the light emitting diodes (LED) both at the wavelengths of 850 nm and 940 nm. The thresholds were determined by measuring the waveforms of the changed voltages of NIRSP receiving system as a measurement of the transmission at human tissue. When the receiving waveforms were taken on the certain behavior as the emitting waveforms, the duty ratio threshold for regular transmission at human tissue of NIRSP was observed. The experimental results show that the duty ratio is an important index for the transmission at human tissue of NIRSP. And the duty ratio thresholds for regular transmission both at the fingertip and palm of NIRSP at the wavelength of 850 nm and 940 nm have been given.
Two-Dimensional Barcode Encryption Technology Based on Improved Chaotic Sequences of Logistics
Authors: Zhou Jian Min , Cai Li
Published: July 2013

A new method for two-dimensional barcode encryption through using improved chaotic sequences of logistics has been proposed. The image of two-dimensional barcode was divided into two parts and chaotic sequence for encryption with the two parts was used respectively. Experiments results denoted that five key ensured the encrypted image higher security. The MSE between the original image and the encrypted image is 3.49×106. Computer simulations are presented to verify its good resistance to salt and pepper noise.
Research of 3D Stereoscopic Virtual Imaging Based on Visual Evoked Potential
Authors: Zhang Gui Xin , Wu Ping Dong , Huang Man Ling
Published: July 2013

In order to broaden the visual range of the 3D screen, the authors of this paper extract the characteristic values of the steady-state visual evoked potential by combining the methods of wavelet analysis, superposition average and FFT. It is illustrated by experiment that, although the amplitude changes, the characteristic values can be exactly extracted when wearing 3D polarized light glasses, so that the range of the 3D screen can be successfully broadened.
Gear Fault Identification by Envelope Order Analysis Based on ADAMS Simulation
Authors: Li Yun , Guo Yu , Guo Jun , Yu Xian Jun , Liu Yan Xue
Published: July 2013

Due to the gear fault signal are often covered by complex noisy even under varying-speed running condition, and it is difficult to simulate the gear fault impact in practical work. To address the problem, a simulation scheme of gear fault is proposed in this paper. In the proposed approach, the gear fault model is built in UG at first. Subsequently, the model is imported in ADAMS, in which the meshing force instead of the vibration signal from a gearbox in real world is extracted, and then the envelope of the meshing force signal is extracted. Finally, the envelope order spectrum analysis scheme is used to obtain the feature order of gear faults. Simulation is conducted to verify the validity of the proposed method.
Fault Diagnosis Platform Development Based on Wavelet Transform for Wind Turbines Transmission System
Authors: Hou Zhao Ran , Wang Wu
Published: July 2013

Wind turbine transmission system with complex structure and abundant fault features, also the fault features are variable, three typical fault and failure forms of rolling bearings, shafts and gears in wind turbine drive train were analyzed, also the failure mechanism and corresponding vibration signal characteristics was proposed. In the wind turbines transmission system, the vibration signal can reflect most of the fault information, as there was non-stationary signals in the vibration signals and wavelet transform for feature extraction was proposed. The whole framework of the fault diagnosis platform was constructed, the lower machine based on the measurement unit and the PC based host computer diagnosis system was designed, the diagnosis system was powerful and easily cut, which was strong help to the fault character extraction, also it was practical and available for wind turbine fault diagnosis.
A Method on Realizing Signal Generator for Arbitrary Waveform
Authors: Zhou Deng Rong , Zhou Yu Rong , Gong Jian Chun , Chen Da Xing
Published: July 2013

The basic approach of generating arbitrary waveform is the digital synthesis method. Appling this method, one first samples and quantifies a period of the signal waveform to be generized, memorizes the obtained binary waveform data in a memory, and then reads it via hardware circuit in certain sequence, converts the data via digital-to-analog (DA) circuit, finally output the analog waveform through a filter. In this work, an arbitrary waveform generator (AWG) is designed based on the theory of direct digital synthesis (DDS)[1-7]and on the analysis of the performance of the output signal. The design uses a field programmable-gate-array (FPGA)[3]chip to utilize the AWG. The preset and display of the output frequency and phase are controlled by a micro computer unit (MCU). The artribary waveform data can be downloaded and updated from a communication interface. The AWG can produce a high-resolution arbitrary waveform. The dissertation focuses on hardware circuit design, which has been accomplished, including power supply module, MCU system, high-speed DA converter, and filter, etc. The experimental prototype of the AWG has been made and tested systemly.At the end of the dissertation, the measurement result of the system is given and its error is analyzed. It is shown the AWG can output a sine wave, a triangle wave, a sawteeth wave, or a square wave within the frequency range from 0.01Hz to 15MHz with the step of 10mHz, or output an arbitrary waveform within the range from 0.01Hz to 20kHz.
Application of an Adaptive UKF in the Frequency Offset Estimation of OFDM with Colored Noise
Authors: Jiang Zhu Qing , Liu Chong Hua , Feng Wen Jing , Huang Cheng Kai , Wang Yu Peng , Li Bei Bei
Published: July 2013

OFDM system is sensitive to the frequency offset, by which the orthogonality will be destroyed between the sub-carriers and the Inter-Carrier Interference (ICI) will be generated. Considered that the colored noise is often studied in the dynamic data processing, an adaptive Unscented Kalman Filter (UKF) is presented to estimate and eliminate the frequency offset in this paper. Adaptive factors are introduced into the iteration of the state variance and the noise variance to inhibit the misalignment in the filtering caused by the correlation of the noise. The results of simulation show favorable estimation of the frequency offset, as well as the smoothing effect of the adaptive UKF, which is the evidence of the strong tracking effect of the proposed algorithm.
MATLAB Simulation of DBPM Digital Down Conversion
Authors: Sun Xu Dong , Leng Yong Bin
Published: July 2013

A software defined radio architecture algorithm is applied to Digital BPM processor for its signal processing. The algorithm is evaluated in MATLAB with data acquired from the instrument with a commercial signal source as input.The data flow diagram of the algorithm is shown and explained, critical parameters of the filters are displayed and the results are shown which testify the feasibility of the method.
Approach for Mining Fault Rules of Power Grid Based on the Combination of Rough Set Theory and Association Rule
Authors: Liang Yong Chao , Zhang Xi Jia , Zhou Peng
Published: July 2013

With the increasing of fault information transmission capacity in power grid, the volume of information which needs to be concerned by dispatchers has greatly increased, consequently making it difficult to identify the fault signal and analyze the cause of the accident quickly for dispatchers in massive fault information. To settle this problem, this paper uses a novel approach that combines rough set theory with association rule for mining fault rules in a large number of historical fault data of power grid. Firstly, it builds distributed original decision tables according to regions. And then it uses the information entropy algorithm in condition attribute reduction. Lastly, it applies the improved Apriori algorithm of association rule to fault rules mining based on the reduction decision table. In this way the problems of redundancy of massive fault information can be solved and complexity of rules extraction can be simplified effectively. It also improves the efficiency of fault rules mining.
Huffman Coding and Applications in Compression for Vector Maps
Authors: Liu Xing Ke , Chen Ke , Li Bin
Published: July 2013

Huffman coding is a statistical lossless coding method with high efficiency. The principal and implementation of Huffman coding is discussed and Huffman coding is implemented to the compression of vector maps. The property of the algorithm is discussed. Experiments demonstrated that the algorithm proposed can compress vector maps with high efficiency and no loss.
Effects of Microwave Field on Supercurrents and Entanglement in Measurement of Qubit-State Readout
Authors: Hu Ju Ju , Wan Xiang Dong , Ke Qiang , Ji Ying Hua
Published: July 2013

We carefully investigate the effect of cavity field quantum state on the quantum entanglement and supercurrent dynamical behaviors of coupling superconducting qubits in circuit QED system. The results show that not only the time-evolving dynamics of entanglement exhibit collapse and revival oscillation behaviors，but also that the single sideband envelope of current is almost similar with the time-evolving curve of entanglement.
Study on the Delay of UAV Data-Link Based on TDMA and Aloha Channel Access Protocol
Authors: Huang Wen Zhun
Published: July 2013

The existing test method for properties of UAV data-link is usually the actual flight test or field "distance" test, which has long test cycle and difficulty for the extraction of test data. In view of this situation, we in this work adopted the data-link semi-physical simulation test platform based on darkroom calibrate-link method, establishing and analyzing the space natural decline model, atmospheric environment model, and aircraft attitude angle model that affecting the transmitting and receiving of signals. Meanwhile, the average delay from-terminal-to-terminal and the fluctuation of the average delay of the UAV under different MAC channel access protocols are discussed using the darkroom calibrate-link method. In order to improve the response characteristics of the UAV, time delay is compensated using optimal control methods, and the effectiveness of the compensation method is validated based on and the platform we built. The simulation results show that, the design of UAV data-link can be calculated by this theory, and the introduction of the optimal control method significantly improves the dynamic response characteristics of the UAV.
Ensemble Learning Approach with Application to Chinese Dialect Identification
Authors: Xia Yu Guo , Gu Ming Liang
Published: July 2013

In this paper we propose ensemble learning based approach to identify Chinese dialects. This new method firstly uses Gaussian Mixture Models and N-gram language models to produce a set of base learners. Then the two typical ensemble learning approach, Bagging and AdaBoost are conducted to combine the base learner to determine the dialect category. The ANN is selected as weak learner. The experimental results show that the ensemble approach not only enhances the performance of the system greatly, but also reduces the contradiction between the training data and the number of parameters in models.
A Novel Header Bits Estimation Scheme for H.264/AVC Standard
Authors: He Shu Qian , Deng Zheng Jie , Shi Chun
Published: July 2013

Rate estimation is useful for many H.264/AVC applications including rate-distortion optimization (RDO) for fast mode decision and precise rate control. In this paper, we propose a new header rate prediction model and an adaptive algorithm to provide more accurate estimation of the number of total coding bits for rate control compared to previously proposed methods. The header bit rate estimation is modeled by a linear combination of the number of mode block, and the sum of absolute values of all motion vectors for each block. Based on the proposed model, a header rate estimation function is also proposed to give a more accurate rate-distortion rate control. The proposed schemes can achieve better results in rate-distortion and rate control to previously proposed approaches.
Extraction of the Geometric Features from the Vacuum Switching Arc Images
Authors: Dong Hua Jun , Dong Wen Liang , Kang Kai , Wang Dao Shun
Published: July 2013

Vacuum circuit breaker is one of the major critical components that controls and protects the power system. The breaking capability of the vacuum switch directly affects the safety of the power system. However, the breaking capability of the vacuum switch is determined by the morphological characteristics of the vacuum arc images. In this paper, in order to research the variation of the vacuum arc, a high-speed CMOS camera system is used to collect the vacuum arc images within a short gap (7mm), the morphological characteristics of the vacuum arc images are extracted based on the digital image processing. At last, the variation of the arc is analyzed.
Study on Compressed Representation of Graph
Authors: Wang Hai Tang
Published: July 2013

Image compression for image storage and transmission are very necessary. In order tomore save memory space and more be used as a compressed representation of a image, a image ismapped into a graph, we can use the labeling of graph to compress and give a new graphs compressedrepresentation.
Application of L-K Optical Flow Algorithm Mixed with Pyramid on Calculating Water Surface Flow Field
Authors: Han Zhao Hui , Wang Yan Feng
Published: July 2013

A classical Lucas-Kanade optical flow algorithm was used to analysis the IR Image sequence of the wind-driven surface in this paper. Gaussian pyramid representation was introduced to retain both detail components and veracity for velocity field when considering the aperture problem and robustness. Three layers of pyramid for L-K optical flow is the best comparing with other layers (from one to four) in property. L-K optical flow algorithm mixed with pyramid representation shown an qualified power on calculating water surface flow field, demonstrated by optical flow fields on different wind speeds ( from 3m/s to 6m/s).
Polynomial Correction of Digital Image Based on MATLAB
Authors: Li Xin Ying , Gong Yu Fang
Published: July 2013

Polynomial method in digital image geometric correction of a wide range of applications, this correction method does not consider the image spatial geometric process, but directly to the image itself is simulated, in order to achieve correction purposes, has simple and flexible features such as. This paper expounds the polynomial correction method, and combining with the features of MATLAB, designed and developed the digital image correction program. In order to verify the accuracy of the program to program, a series of image was corrected from experiment, result analysis, program design thinking is correct.
SAR Image Denoising Based on Wavelet Packet and Median Filter
Authors: Zhao Hui Huang , Lopez Jr Juan F. , Martinez Alex , Qiao Zhi Jun
Published: July 2013

In this study a novel image processing approach is proposed to improve the denoising in SAR images based on wavelet packet and median filter, Median filter is adopted to remove noise in the wavelet packet domain. At first, the process of the novel is introduced in detail .At last, by adding some simulated noise in the SAR image, the performance of the proposed approach is shown and compared with other filter algorithms in terms of PSNR
Study on 3D Model Reconstruction of Human Knee Joint Based on MRI
Authors: Han Yue Mei
Published: July 2013

Reconstruction of a 3D model for human knee joint is the basic step for its kinematics and dynamics analysis. To make further research on knee joint modeling, we present a new method to reconstruct 3D knee joint models based on magnetic resonance image (MRI). This method consists of steps as pretreatment of the images, the region growing for segmentation and the contour interpolation or the grey value interpolation and so on. The resulting 3D knee joint model are used for dynamics analysis of human knee joint after being imported into the finite-element platform which includes the tibia, the femur, the meniscus and the cartilages. The 3D model provides the possibility for the research on the movement roles and mechanics characteristics of the knee joint.
Research on Wrong Match Pairs Elimination of SIFT Algorithm
Authors: Zhang Dong Xing , Zhu Ming Bo , Li Xiang Ping
Published: July 2013

The image matching is key technology of image processing applied to many fields. Image matching based on invariant features was the hot spot in image matching research recently. SIFT is one of the most effective scale, rotation and illumination invariant features. However there are a lot of wrong match pairs produced by original SIFT algorithm. Two specific types of wrong matches are analyzed and corresponding eliminating methods are given. Aiming at general wrong matches eliminating, a method based on similar triangles is proposed. Experiments are carried out, and the results confirm that: compared with the art of state, the proposed method is faster; it can eliminate wrong matches cleanly and preserve correct matches as well.
Feature-Based GDLOH Deformable Registration for CT Lung Image
Authors: Yang Yu Han , Xie Yao Qin
Published: July 2013

To improve the efficiency and accuracy of the conventional SIFT-TPS (Scale-invariant feature transform and Thin-Plate Spline) method in deformable registration for CT lung image, we develop a novel approach by using combining SURF(Speeded up Robust Features) and GDLOH(Gradient distance-location-orientation histogram) to detect matching feature points. First, we employ SURF as feature detection to find the stable feature points of the two CT images rapidly. Then GDLOH is taken as feature descriptor to describe each detected points characteristic, in order to supply measurement tool for matching process. In our experiment, five couples of clinical images are simulated using our algorithm above, result in an obvious improvement in run-time and registration quality, compared with the conventional methods. It is demonstrated that the proposed method may create a new window in performing a good robust and adaptively for deformable registration for CT lung tomography.
Design and Implementation of High Speed Image Data Protocol Conversion System
Authors: Liu Yan Fei , Li Qi , Xu Jian Feng , Guo Suo Li
Published: July 2013

This paper presented a high-speed image acquisition system based on PXI bus and Low Voltage Differential Signaling (LVDS) technology, with the characteristics of mass data, high-speed of data acquisition in the field of modem technology and scientific research. It expatiated the whole frame, and emphasized the design and implement of the system. It simulated the Ping-Pong operation of image data transmission, and tested the performance of the system. The results of test indicate that the high-speed image acquisition system has good ability of acquisition and transmission, and it can satisfy the engineering applied demand.
Structural Analysis of a Grinding Machine with Linear Motion Guide Applied
Authors: Oh Seon Yeol , Bang Han Seok , Choi B. Y. , Choi Woo Chun , Cho S. J.
Published: July 2013

A finite element model of an ultra-precision grinding machine that can have high precision and high stiffness is constructed and structural analysis is done with equivalent stiffnesses of linear motion guides by after structural design and the deformation of the grinding machine is obtained. In order to reduce the deformation of the grinding machine that causes bad influence, structural complement is conducted by adding ribs at the lower part of the column. Also, the straightness of the grinding machine is improved by lifting that the base side of the column.
Research on Variable Steering Ratio of Vehicle Steer-by-Wire System Based on Joystick
Authors: Zheng Hong Yu , Wang Bing Yu , Zong Chang Fu
Published: July 2013

In the steer by wire system of vehicle, a joystick can instead of the steering wheel. A control algorithm based on variable steering ratio is developed on the basis of vehicle speed and joystick steering angle. By verifying the control algorithm with the vehicle model from CarSim, it shows that this proposed algorithm can effective carry out steering intention of drivers, which enhance the steer comfort in low speed driving and steer handling in high speed driving and effectively improve the vehicle maneuverability.
Exploration of Magnetically Controlled Shape Memory Alloy Vibration Energy Harvestor
Authors: Zhang Qing Xin , Yu Hui Yang , Xie Yu Huan
Published: July 2013

This paper first introduces the research and development status of Magnetically Controlled Shape Memory Alloy and analysis its application in the vibration energy harvestor; next lists several typical vibration energy harvestors, describes the principle of power generation, power generation, and research of them; then makes a study of the status quo of the MSMA energy acquisition, describes the difficulties finally, challenges and trends faced with the MSMA vibration energy harvestor.
Active Visual Method for Mobile Robots Localization using Double Freedom Pan-Title
Authors: Wang Bo , Qi Xing Guang
Published: July 2013

For a monocular camera-based mobile robot system,we propose the active visual method for robot localization,based on the double freedom pan-tilt.First,the kinematic model of the mobile robot system of monocular vision is given.Secondly,by controlling the pitch and yaw angles of pan-tilt,the camera optical axis always points to the target geometry center in order to solve the field of view problem.Coordinate system relative pose solution method which based on dual quaternion avoids calculating the singularity and improves the positioning accuracy of mobile robots.Finally,according to pan-tilts feedback angles,extrinsic parameters of the camera,the pose and the position of the camera,the position vector and pose vector of the mobile robot are obtained.
The Vision Orientation System Based on OpenCV of the Glass Curtain Wall Cleaning Robot
Authors: Zhang Dong Ping , Huang Yuan Liang , Chen Jia Hao , Luo Xiang Hua
Published: July 2013

This paper proposes a vision orientation system based on OpenCV to solve the orientation problem that glass curtain wall cleaning robots meet with at work. The system applies edge detection and the Hough transform to the images captured by the monocular camera, then judges whether the robot has reached glass edges according to the results of histogram comparison between the target image and the template image. Finally the system sends corresponding orders to the robot for path selection and orientation.
Development of Derived CNC System for Ship Engine Piston Turning
Authors: Zheng Dong , Zhou Hui Xing , Huang Can , Hou Ming
Published: July 2013

Based on the principle of derived CNC, a NC lathe system is redesigned for cutting ship engine pistons which have a non-circular middle-convex and varying oval (NMVO) profile in the skirt. With an attached high-speed linear motor servo unit, a new derived CNC lathe system based on a normal NC lathe system is developed to machine non-circular section. Using this method, the development cost is reduced. A moving magnet voice coil motor is designed as the actuator to provide sufficient stroke and driving force for the cutting. The controller of the derived unit is designed based on digital signal processor (DSP) TMS320F28335, and a method of pre-interpolating data on main computer is employed in the software development. By doing this, the real-time performance of the system is satisfied.
Optimal Design of Regional Power-Enhancing Based on Mixed Navigation Constellation
Authors: Wang Dong Hui , Liu Wen Xiang , Yong Shao Wei
Published: July 2013

In navigation war, satellite signals need to be power-enhanced to improve anti-jamming performance, especially in some important areas. A navigation constellation structure is proposed for optimal regional power-enhancing performance. In the structure, GEO and IGSO are adopted to be the basic power-enhanced satellite, all the GEO and IGSO satellite antenna beams are turned to point to the power-enhanced target areas center while power-enhancing. MEO satellites are adopted as complementation to improve satellite coverage performance in power-enhanced area. The design principle is to let the satellite number minimum under the condition of satisfying coverage performance in power-enhancing area. Simulation results show that, for a regional area with the radius less than 1500km, 3GEO and 3IGSO constellation structure can provide a power-enhancing service with average GDOP less than 5.3. When adding 12 MEO satellites, the GDOP can reduce to 2.
Design and Application of Automation System for Reconstruction and Expansion of Small Oilfield Station
Authors: Geng Yu Guang , Song Li Mei , Li Ming Zhu
Published: July 2013

With the rolling development of Suqiao-Wenan Oilfield, the original small treatment station-Station Wen 11, cannot satisfy production requirements. It is necessary to reform and expand the crude oil storage and treatment capacity, water-injection capability and natural gas treatment capacity, on the basis of the original construction; establish new crude oil treatment, fire-fighting and heating systems, as well as supporting systems like crude oil loading and unloading, automatic monitoring and cathodic protection systems, to form a medium-sized centralized oil-gas-water treatment station with complete functions. This paper introduces design, implementation and application effect of the process automation system after Station Wen 11 undergoes reconstruction and expansion.
The Research of China Made DCS Application on Supercritical and Ultra Supercritical Units of Guohua Electric Company
Authors: Zhang Qiu Sheng , Fan Yong Sheng , Liang Hua , Hu Xiao Hua , Chen Feng , Hu Shu Yun
Published: July 2013

Guohua electric company use domestic DCS and optimizing control software in four power plants: Taishan,Xuzhou,Chenjiagang and Hulunbeier, there are 2 supercritical uints and 6 ultra supercritical units. During the research, Guohua company help DCS companies to increase quality and lower the risk by compiling and carrying out DCS Factory acceptance standard, Technical guide for logical review of DCS,DCS emergency pre-arranged planning,training I&C staff by virtual DCS simulation machine.The result of above 4 power plants shows that China made DCS could be successfully operation on 1000MW and 600MW ultra supercritical and .supercritical units.
Control and Management System of LED Bulb Assembly Line Based on Matlab and WinCC
Authors: Xu Hui , Li Li
Published: July 2013

In order to realize the control and management system of LED bulb assembly line that can exchange and analyze real-time information of production line, first, a monitoring system based on WinCC was built; it can be used not only in on-line real-time monitoring but also in analyzing and diagnosing line’s trouble. Second, we used Matlab as the data processing platform, exchanged data by OPC technology, combined Matlab’s powerful calculate ability with power of WinCC real-time collect data, so the dynamic data exchange between Matlab and WinCC can be realized .In the end , BPNN was used to relate test results of LED Bulb to machine’s running parameters by learning data from host computer. In this way, parameters of machines can be adjusted in real-time and qualified products' rate can be improved.
The Study on Liquid Level Control System Based on PLC and WinCC
Authors: Zhao Min , Ren Cai Yun , Lei Dong Liang , Qi Feng Lian
Published: July 2013

Based on the PLC control technique and WinCC configuration technology,the control system for the liquid level of the tank was designed. After receiving liquid level signal that transferred from radar tester,the PLC process it ,and then output related control signal to the actuator.The actuator is composed of two AC motors,one is for the main pump ,and another for the auxiliary pump.The function of human-machine interface is achieved with the help of Smart700 touch screen of Siemens.Communication functions between the WinCC project and the PLC site and pictures of the control process which enabals real-time monitoring of the entire system are finished by designing configuration.Finally,the validity of the system and the feasibility of the design have been proved by debugging and the use of enterprises.
Research on the Intelligent Control System of Greenhouse Based GPRS/GSM and PLC
Authors: Xu Zhi Fu , Sun Li Ping , Shi Xiao Yan , Ye Hong Bao , Li Dong
Published: July 2013

The intelligent control system of greenhouse is based on the technical framework, which combined GPRS/GSM wireless communication module with PLC. The system uses microcomputer to collect information, GPRS/GSM to communicate, PLC to control. The comprehensive environmental of greenhouse group would be dynamic controlled, that about temperature, light, water, fertilizer and other environmental factors. The system has many advantages, such as designed visualization, humanized framework, and easy operation, etc.. The automatic control and management level of the greenhouse are effectively improved.