Computer Life (CPL) 

 ISSN: 1819-4818

Delivering Quality Science to the World

Archieves

Volume 4, Issue 2, 2016

 

Page No: 106-115

Researches on Residual Oil Distribution Characteristics and Dig the Potential Countermeasures of Front Facies Reservoir in Delta

Di Wang1, Haiyu Yang2, Yujia Jiao1

1School of Petrochemical Engineering, Northeast Petroleum University, Daqing 166318, China

2Daqing Oil Field Co, Heilongjiang 163000, China

Abstract: According to the oil reservoir which is dominated by delta front facies deposition and in the reservoir and combined with control of residual oil by sedimentary microfacies. This paper analyzed distribution characteristics of remaining oil in the interlayer, layer and inner layer. Using numerical simulation method to study the delta front facies reservoir remaining oil distribution, mainly about underwater distribution main channel and the main sheet sand body lateral remaining oil, fault block type, injection production faultiness type, interlayer interference, and according to the distribution of remaining oil proposed corresponding measures for tapping potential, infill drilling, injection production system adjustment, injection wells for profile control, acidification and so on.

Keyword: sedimentary microfacies, numerical simulation method

 

Page No: 116-125

Deposition of Zinc Oxide Thin Film on Various Metal Substrate by rf Magnetron Sputtering

Ronghui Lin1, 2, *, Hui You2, Rui Zhang2, Ping Zhang1, 2, Qiyan Zhao1, 2

1School of Engineering Science, University of Science and Technology of China, Hefei, China

2Institute of Intelligent Machines, Chinese Academy of Science, Hefei, China

Abstract: This paper studied zinc oxide thin film deposited on various metal substrate by radio frequency magnetron sputtering using metallic target. The surface roughness, grain size, as well as stress of the thin film sputtered on Au, Pt and Al were studied. The influence of sputtering pressure on the film were also investigated. Results show that all the as-deposited ZnO thin film is polycrystalline and have a hexagonal wurtzite structure with a strong c-axis preferential orientation. By comparison, ZnO/Al has the best crystalline, but its surface roughness is highest. The working pressure influences the crystal structure by changing the kinetic energy of sputtered species. This work provides the references for selecting proper electrode material for the piezoelectric applications of ZnO thin film.

Keyword: ZnO thin film, sputtering, metal electrode, XRD, SEM

 

Page No: 126-139

Compensation-based Joint TDOA and AOA Location Algorithm in Wireless Sensor Networks

Beiya Yang1, Feng Yang1, Ting Hu2, Hui Xiong1

1School of Electronic Science and Engineering, National University of Defense Technology, Changsha, China

2School of Electronic Information Engineering, Lanzhou Jiaotong University, Lanzhou, China

Abstract: Time Difference of Arrival (TDOA) has become a widespread method for Wireless Sensor Networks (WSN) localization, because of its advantage in high accuracy and robust performance. However, there are two problems for it, the clock synchronization between anchors and the calculation complexity. Compensation-based Joint TDOA and AOA location algorithm presented in this paper uses the Time of Arrival (TOA) information between anchors to estimate the relative clock offsets and clock skews, then use the estimated timing parameters to compensate the TDOA information between anchor and tag and restrain the influence of asynchronous clock on localization. After the compensation of TDOA information, this algorithm joint the measurement angle-of-arrival (AOA) information and the TDOA information to locate the tag. Simulation results show that it presents location estimate with relatively high accuracy and reduces the number of anchors needed. Furthermore, this algorithm is theoretically iteration-free, effectively simplifies the calculation, and shows great localization performance in WSN.

Keyword: WSN, TOA, TDOA, AOA, Synchronization

 

Page No: 140-148

Simulation Analysis of the Furrow Opener Working Process Based on DEM

Yajun Yu, Shuchang Sun, Jin Sui, Jianqun Yu

School of Biological and Agricultural Engineering, Jilin University, Changchun, China

Abstract: This paper takes the furrow opener as the research object. The 3d discrete element method analytical models of two types of furrow openers which is designed using 3d CAD software are established, subsequent DEM analytical models of the soil particles are established based on the EDEM software, and the hysteretic spring contact model has been used to calculate the soil-opener interaction. On this basis, the effects of moisture content of the soil, speed and depth of furrow operating on tillage forces are studied by simulation analysis in 3D DEM using the EDEM software. Good agreement has been found between the numerical results and experimental data and the relative errors are within 9%~20%. The feasibility and effectiveness of analysing the furrow operating process using DEM are validated.

Keyword: component, furrow opener, the discrete element method, soil particles, digital design

 

Page No: 149-156

Research on Mechanism of an Expansive Loess Tunnel Entrance Mass Collapse

Luchen Zhang1, *, Bingyang Feng2

1Geotechnical and Structural Engineering Research Center, Shandong University, Jinan, China

2Sinopec Engineering Incorporation, Beijing, China

Abstract: Tunnel’s large deformation was able to be caused by loess expansion, and tunnel collapse, even landslide, might happen after that. Based on the practical collapse of an expansive loess tunnel, research on the mechanism of expansive loess tunnel entrance collapse was carried. The property test of loess showed loess surrounding tunnel had strong expansion potential, in addition, comparison between calculated and actual mean values proposed that expansive force with the expansion deformation might cause initial support deficiency and tunnel collapse. In addition, using the convergence – confinement method, the collapse mechanism was analyzed.

Keyword: expansive loess tunnel, collapse, landslide, expansion force

 

Page No: 157-164

Stability of Landau Levels under the Influence of an Electric Field

J.Chee and W.Q. Lu

School of Science, Department of Physics, Tianjin Polytechnic University, Tianjin 300387, China

Abstract: Consider the time evolution of a charged particle subjected to a uniform magnetic field and an electric field   that exists for a finite period of time. The electric field can induce intra-Landau level transitions (magnetic translations) that do not change the energy of the particle.  It may also induce energy changing inter-Landau level transitions. The question is beyond the scope of standard perturbation theory because here the Landau levels are infinitely degenerate. We note that the magnetic translation concept is intimately connected with the calculation of the inter-Landau level transition probability.  The probability is completely determined by the Fourier component of the electric field corresponding to the cyclotron frequency. Our main observation in this paper however is that the Fejer asymptotic form of Laguerre polynomials implies that no matter how small the Fourier component is,  inter-Landau level transition probability from a fixed Landau level to other energy levels can be arbitrarily close to 1 if the original Landau energy level is high enough, i.e., influenced by a given electric field, Landau levels of higher energy are less stable asymptotically and their transition probabilities are explicitly predicted by the Fejer formula.

Keyword: nonadiabatic transitions, Landau problem, Fejer expression for Laguerre polynomial

 

Page No: 165-180

Permanent Magnet Synchronous Motor Inverter Dead Zone Effect and Study of Compensation Strategy

Zhiyu Huang, Xuri Qiao, Tianjun Xia and Shangchuan Du

School of Automation, Chongqing University of Posts and Telecommunications, Chongqing 400065, China

Abstract: Because electronic devices exist inherent turn-on and turn-off time and dead zone delay time is added to PWM, which lead to distortion of the output waveform of inverter and increasement of harmonic content. To solve this problem, this essay introduces the setting mode of dead zone about PWM-control first. We analyze the state of current during the dead zone time. Besides, zero current clamping phenomenon and deviation voltage caused by dead zone compensation, which is based on coordinate transformation of magnetic field oriented control to estimate three phase current polarity. The average voltage compensation method is adopted to compensate dead time effect. Then this essay expounds the process of compensation voltage vector. At last, we has carried on the simulation and experimental test and analyze the three phase current waveform of the output.

Keyword: permanent magnet synchronous motor, compensation of dead-time effect, vector control

 

Page No: 181-191

Electric Vehicle Charger DC/DC Converter Research and Design

Zhiyu Huang, Xiaoguang Su, Xiaochuan Tan

School of Automation, Chongqing University of Posts and Telecommunications, Chongqing 400065, China

Abstract: The role of the DC/DC converter is to transform the output of the APFC circuit to the required DC voltage, and the output is the energy source of the electric vehicle power battery load. In all kinds of switch power supply circuit, Phase-Shifted Full-Bridge (PS-FB)-ZVS converter is widely used in high power field with its both two bridge arms working under the condition of zero voltage soft switching (ZVS), low switch loss, simple structure, and easiness to control. This thesis researched the working principle of the power circuit topology of Full-Bridge-ZVS converter used in this thesis is introduced, the defects such as inherent duty cycle loss and the parasitic oscillation on the output rectifier diodes is discussed. Then, the phase-shift full bridge ZVS converter modeling based on the small signal model of Buck converter. Through the simulation and test, the results verify the correctness of this design.

Keyword: electric vehicle, phase-shifted full bridge, duty cycle loss

 

Page No: 192-201

Analysis of Permanent Magnet Synchronous Motor Control Based on SMO

Zhiyu Huang, Tianjun Xia and Shangchuan Du

School of Automation, Chongqing University of Posts and Telecommunications, Chongqing 400065, China

Abstract: In this paper, a sensorless vector control method of permanent magnet synchronous motor based on sliding mode observer is adopted, and the basic principle and design method of the sliding mode variable structure theory are analyzed, through the analysis of the back EMF, verify the chattering of sliding mode variable method. Finally, the system simulation model is built in MATLAB/Simulink, and the simulation experiment is carried out on the SMO based sensorless control method. The simulation results show that the sensorless control based on the sliding mode observer is feasible and effective, and the existing problems of the traditional sliding mode observer are obtained.

Keyword: SMO, PMSM, No Sensor Vector control

 

Page No: 202-212

An Implement of Smart TV Which has the Function to Recommend TV Programs

Jingshan Wang, Caihong Li, Yi Yang* and Lian Li

School of Information Science & Engineering, Lanzhou University, Lanzhou, China

Abstract: In this paper, we propose a recommendation system for the user to control the smart TV or be recommended with TV program only by the user's voice instruction. This paper will solves 3 issues. The first one is the system should collect the real-time TV programs list. The second one is to construct the user's interest model. The third one is the recommendation of the TV programs to the user which meet to his preference. The data of the TV programs distributed in the internet can be collected by the web crawlers, but sometime the data has different format and encoding and should be converted into well-structured format. Then the system store every user's instruction about program and construct the user's interest model. In order to give the user an individual TV program recommendation, this paper proposes an implemented item-based algorithm which can automatically extracts the user's preference and recommend the user with his favorite TV programs. The experimental results have shown the proposed method have good performance.

Keyword: smart TV, program recommendation, user preference analysis for program, SVM

 

Page No: 213-217

Research of Solar and Wind Comprehensive Power Generation System Implementation Conditions

Ji Zou, Chao Zhang, Ju Wang, Lei Zhao, Bo Chen

Electronic and Information Engineering College, Chang Chun University, Chang Chun 130022, China

Abstract: Article points out that the wind-light complementary system as an independent power supply system and clean power supply system, which has extensive application, wind-light complementary system are analyzed in the resource use, and the rationality of the system configuration, outlined the development of wind-light complementary system at home and abroad and the application situation. System introduces the content of the project and implementation scheme, and analyses the prospect and forecast scientifically social and ecological benefits.

Keyword: solar-wind complementary, comprehensive power generation, implementation conditions

 

Page No: 218-225

The Research of Acquisition in Movement State of EEG Signal

Chao Zhang1, Ji Zou1, Xilu Zhao2

1Chang Chun University, Chang Chun, China

2Saitama Institute of Technology, Saitama, Japan

Abstract: In this study, we proposed and evaluated the use of Independent Component Analysis (ICA) combining the EEG dipole model to automatically remove eye movement artifacts from the EEG without needing EOG as a reference. We separated the EEG data into independent components using the ICA method, and determined the source localization of these independent components with a single dipole model. The EEG signal was reconstructed by automatically excluding those components localized within a preset eye model. EEGs from 12 patients were analyzed. The experimental results indicate that ICA with the dipole model is very efficient at automatically subtracting the eye movement artifacts, while retaining the EEG slow waves and making their interpretation easier.

Keyword: Multi-modal, Electroencephalogram (EEG), Brain Computer Interface (BCI), Motor Imagery (MI), movement

 

Page No: 226-234

Urban Water Demand in Maoming Based on Gray Neural Network Optimized by PSO

Ganzhou Wu

School of Science, Guangdong University of Petrochemical Technology, Maoming, China

Abstract: Because water demand forecast model is nonlinear and stochastic, the grey neural network model based on PSO is established. In this model, particle swarm optimization algorithm is used to optimize the initial parameters of grey neural network model. Therefore, A PSO-based on forecasting grey neural network model is built. The urban demand data in Maoming from 1996 to 2015 are used to testify and analyze the performance of the proposed model. According to the experimental results, the PSO-GNNM model has higher predicted accuracy than GNNM.

Keyword: water demand, particle swarm optimization, grey neural network, gray model

 

Page No: 235-243

The Error-based Minimal Control Synthesis Algorithm of Automotive Electronic Throttle

Hao Xu

Control Engineering, Chongqing University of Posts and Telecommunications, Chongqing, China

Abstract: Electronic throttle is an important part of modern automobile. From the control point of view, the electronic throttle valve has a very strong linear characteristics and parameter uncertainties, which affect the performance of the system. In this paper, a linear time invariant model is established for the electronic throttle system. Based on this model, design the error-based minimal control synthesis algorithm controller. Specifically, the algorithm of single neural controller structure is proposed according to the size of the error. The theoretical proof and analysis show that controller can ensure good convergence and stability. The result of the simulation demonstrates this control method has strong self-adaptive, self-learning ability and better robustness and indicates the proposed approach can improve the control precision and responding speed of the electronic throttle system.

Keyword: electronic throttle, linear, minimal control synthesis algorithm, robustness

 

Page No: 244-249

Application of SVM in Electromyography Pattern Recognition

Liye Ren1, Lifeng Ren2, Shumei Li3, Jingming Hu1

1Department of Electronic Information Engineering, Changchun University, Changchun, China

2School of Information Engineering, Jilin Agriculture Science and Technology College, Jilin, China

3Department of Music, Changchun University, Changchun, China

Abstract: A new pattern recognition method of surface electromyography(EMG)is proposed, based on wavelet transform and support vector machine(SVM).The original four-channel EMG signals from four corresponding muscles are analyzed with wavelet transform, then the singular values of wavelet decomposition coefficients are extracted to be the signal characteristics to construct eigenvector. Aimed at the multi-motion pattern classification problem of lower limb EMG, a SVM-based multiclass recognition method was proposed. The SVM was constructed using the binary tree structure. Based on the wavelet frame and the kernel method of SVM.

Keyword: support vector machine, system identification, algorithm

 

Page No: 250-255

The Application Research of Infrared Image Enhancement System

Dongmei Liu, Ji Zou, Xiaoli Wang

Changchun University, Changchun, China

Abstract: A new adaptive image enhancement algorithm is presented, because histogram equalization algorithm can't effectively suppress noise shortcomings. First, the statistic histogram of the infrared image is done to estimate the platform threshold, then statistical histogram is corrected. Finally the gray value of the image pixel is corrected and output. Combined with practical application, build a high-speed infrared image enhancement processing platform based on high performance DSP TMS320DM6437 and FPGA. The proposed algorithm on the platform with real images is validated, and experimental results shown that the system can improve the contrast of the infrared image while effectively suppress the noisy interference. The running time of the program is shorter, so it can meet the real-time requirements of the project.

Keyword: infrared image, enhancement, application, contrast, histogram equalization

 

Page No: 256-261

Research on Micro Class Applies to Electrical and Electronic Experiments

Xiaoli Wang, Meng Zhang

College of Electronics and Information Engineering, Changchun University, Changchun, China

Abstract: To science and engineering students, Electronics Experiment is an important basic required courses. As micro-lesson now more popular and more practical education, this paper analyzes the current building and departure status of electrical and electronic experimental teaching, combined with the new education - micro class, courses and explore the micro-physics experiment teaching a combination generated positive effects and application prospects.

Keyword: Electronics Experiment, the Inquiry, micro class

 

Page No: 262-267

Electronic Information Specialty Teaching Mode of Graduation Practice and Design Integration

Meng Zhang, Xiaoli Wang*, Jie Li

Electron and Information Engineering College, Changchun University, Changchun 130022, China

Abstract: In the undergraduate education, it is an important key to graduation practice and graduation design .Combining with the actual situation of electronic information profession, analyzes of the traditional education mode, and we has made the preliminary research and discussion for operation mode of the ordinary university graduation practice and design of electronic and information profession. At the same time, we also analyzed the influence of the current employment situation to graduation design, and putted forward some reform methods and thoughts, the integration of graduation practice are in favor of improving the teaching quality of graduation practice and graduation design.

Keyword: graduation practice, graduation design, integration, model of teaching

 

Page No: 268-272

Design and Realization of C Language Automatic Experimental Management System Based on Network Platform

Ping Feng, Jiling Tang, Li Sun

College of Computer Science and Technology, Changchun University, Changchun, China

Abstract: In this paper, we have analyzed of C language experimental open situation in school, and the effect of the experiment instruction process of the teachers. Also, we have made an investigation of C computer language examination system. So, we designed a set of C language experimental automatic management system based on network platform, which was used to assist experiment teaching of C language. Our system has the function of paperless operation management and automatic grading of C language experimental course which is based on network platform, and provided students with a self-practice, self-evaluation of the environment, improved the students' ability to autonomous learning and operating. We reformed the way of C language course experiment evaluation by using the program analysis technology, and then realized automatic operation with plagiarism detection submission, approval and management in our system.

Keyword: C language, experimental teaching, automatic management system

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