bluuebunny/crossref_metadata_2025 huggingface dataset:
The Methods of Face Recognition: A Survey
Authors: Li Xian Wei , Chen Guo Long , Zhang Hai Yang
Published: August 2013

Face recognition has received much attention because of its theoretical challenges as well as applications in user identification, surveillance and humancomputer interaction. As a result, numerous methods have been developed for face recognition in the last few decades. Some universally used methods are introduced in this paper. On the same face recognition database, the recognition results are analyzed and compared.
Propagation Effectiveness Prediction and Simulation of VLF Communication
Authors: Li Guang Ming , Liu Cui Hua , Cai Guang You
Published: August 2013

The vlf radio wave propagation is usually treated as a waveguide problem. It should be noted that many of the parameters that describe the boundaries of the earth-ionosphere waveguide are not known with great accuracy over all regions and times. In order to know the effect of underwater platform receiving in corresponding region and time, this paper makes use of the waveguide mode theory to predict the propagation effectiveness of vlf radio, offers the service of propagation environment for the system to adjust the variable parameters or abstain from propagation attenuation, makes the system performance matching the channel character and advancing the effects of vlf communication.
Simulation Study of Permanent Magnet Synchronous Motors Energy Feedback Control System
Authors: Wei Wei , Xue Peng , Zhang Bin
Published: August 2013

Combined with the brake working principle of Permanent magnet synchronous motors, the three-phase PWM rectifier mathematical model and Simulink simulation model are set up. On this basis, according to the design requirements of energy feedback system, the voltage current double-loop control is applied in this system. The space voltage vector tracking is achieved by the use of space voltage vector PWM algorithm. The system modeling and simulation study is conducted in the MATLAB simulation environment, and the correctness of the proposed program is verified, which provides the corresponding theoretical basis for the future product design.
Emotion Recognition Based on Chaos Characteristics of Physiological Signals
Authors: Nie Chun Yan , Li Rui , Wang Ju
Published: August 2013

Changes of physiological signals are affected by human emotions, but also the emotional fluctuations are reflected by the body's variation of physiological signal's feature. Physiological signal is a non-linear signal ,nonlinear dynamics and biomedical engineering ,which based on chaos theory, providing us a new method for studying on the parameters of these complex physiological signals which can hardly described by the classical theory. This paper shows physiological emotion signal recognition system based on the chaotic characteristics, and than describes some current applications of chaotic characteristics for multiple physiological signals on emotional recognition.
A NEW Data Acquisition Method to CAN and 1553B Armored Vehicle Buses
Authors: Liu Jun Hui , Qi Chun , Qu Jin Biao
Published: August 2013

There are 5 kinds of bus networks on armored vehicles. The current vehicle serial bus test equipments are not universal to different kind bus system. And can just complete the performance test to DLL, cannot test the buss physical electrical performance. This paper brings forward a new data acquisition method to universal buses based on software decoding, The data acquisition experiments to CAN and 1553B bus with their corresponding bus nodes have been completed.
Attenuation Model of Antenna Signal with Barriers in Wireless Sensor Network
Authors: Xu Bo , Xu Shou Zhi , Wang Qing , Chen Ze Hua
Published: August 2013

Wireless sensor network (WSN) is widely applied to I-home, I-office, greenhouse agriculture, environment monitoring and many other industry areas. Signal attenuation and barriers make WSN hard to get high quality and reliability of network communication, which are very import to monitoring systems. This paper focus on the signal attenuation performance in WSN, analyzes the model of signal attenuation, and researches its performance with different signal transmitting distance and different barriers. According to test results, this paper gives the model of signal attenuation with the effect of barriers on transmitting. The results can apply to the distribution of wireless sensor nodes and the optimization of network topology.
Fatigue Detection System Based on Kalman Filtering and Dynamic Template
Authors: Shi Lan , Zhang Yi Hong
Published: August 2013

In order to reduce the incidence of traffic accidents, it did detailed analysis and further research on fatigue detection system.this system include face detection, eye detection, eye tracking. During the eye detection, it proposed a new approach based on Kalman filtering and dynamic template. And then it did experiments on the detection rate, the PERCLOSs numerical value and the speed. Experiment results show that the detection results can meet the demand of practice. It turns out that this system can meet the demand of basic practice, has an extensive application field.
Elastic Computing Platform Design Based on Lunar Rover Stereo Vision System
Authors: Wang Zhe
Published: August 2013

In the second stage of Chinese lunar exploration program, lunar rover will be launched for the moon. Stereo vision system of the lunar rover is used for navigation and exploration. Binocular stereo vision cameras collect stereo image pairs of surrounding environment which are transmitted to ground station then used to reconstruct lunar 3D terrain environment. 112 image pairs are collected at one site and terrain data increases rapidly as the rover explores more unknown area so that sequential process system is difficult to generate 3D terrain environment in time. To solve this problem, an elastic parallel computing platform is designed and built using OpenMP parallel computing framework on a 16-processor shared-memory machine. In this paper, architecture of the elastic computing platform is introduced and experiments based on real terrain datasets show that the maximum speedup of the platform can reach 6.44.
Research on Layout of Active Decoy in Antagonizing ARM
Authors: Fan Zhen Qin , Ma Yan Heng , Dong Jian , Chen Xin Kai , Meng Jun
Published: August 2013

Decoying technology is an effective mean to antagonize anti-radiation missile. Based on the basic principle of active decoy in antagonizing ARM, the critical resolution angle is clearly defined at first, and the scheme of active decoys is discussed in this paper. With wind speed, angular measuring error and lateral load failure considered, tow-source, three-source and four-source deploy scheme are presented and their operation effectiveness is simulated and analyzed. And under the condition that the distance between two radiation sources is changed, the operation effectiveness also is simulated. After contrast and analysis, three-source equilateral triangle layout is proved to be the most reasonable. The optimal distance also is given in this paper.
Asymmetrical Elementary Excitations Responsible for the Ferrimagnetism in an Antiferromagnetic Spin-1/2 Zigzag Ladder
Authors: Wang Zhong Long , Wu Qiao , Ding Lin Jie
Published: August 2013

The finite-temperature magnetic properties of an antiferromagnetic (AF) bond alternating S=1/2 zigzag spin chain with asymmetrical AF next-nearest-neighbor (NNN) exchange interactions in an external magnetic field are investigated by means of the many-body Greens function theory within random phase approximation. The results show that when the NNN exchange interactions are asymmetrical, the spin system exhibit a clear ferrimagnetic ordering at finite temperatures. It is shown that the ferrimagnetic behavior is attributed to asymmetrical elementary excitations, resulting from the competition between the spin frustrations and magnetic excitations reduced by the asymmetrical NNN interactions. The mechanism of this ferrimagnetism is much different from a common one which originates from mixed spins with different spin values through antiparallel spin alignments.
The Design and Implementation of Aluminum Melt Filtration System
Authors: Ben Yan Bo
Published: August 2013

Before casting, use filtering technology to reduce the impurities and inclusions in the melt. Whether aluminum melt processing is good or not can affect the quality of the products and then, affect the subsequent processing materials product quality. Therefore, aluminum melt filtering technology is an important part of the aluminum production technology. This paper discusses the PLC application in the aluminum melt filtration according to present situation of aluminum production..
Effects of Velvet Antler Polypeptide-Collagen/Chitosan Materials on Proliferation of Osteoblast
Authors: Zhu Wen He , Xu Jun Jie , Zhang Wei , Li Yan , Lu Xiao Jing , Lv Shi Jie
Published: August 2013

A highly osteogenic hybrid bioabsorbable scaffold was developed for bone reconstruction. Though the use of a bioabsorbable collagen and chitosan scaffold for loading velvet antler polypeptide to repair bone defect and drug treatment. Velvet antler polypeptide and collagen were extracted for developing the compounded material. The SEM results show that the collagen and chitosan scaffold maintain the natural three dimensional network structures. The cell proliferation experiment result show that the can promote the osteoblast proliferation for a long time . These results indicated that this compound scaffold can sustainable to release drug and is a good material in bone defect and drug treatment.
Continuous Plane Method Design Conical Surface Artifacts
Authors: Liang Meng Hai , Wang Shu Ying , Yang Zhan Min , Wang Yi
Published: August 2013

Established a unified equation of conical surface cutting line, analyzed the main cutting line critical characteristics, studies the section curve of plane problems, discussion plane curve property, continuous planar interception solution of two types of components are presented.
Empirical Research of Portfolio Selection under M-SAD Model
Authors: Zhang Peng , Zhou Jing Yi
Published: August 2013

The mean semi-absolute deviation is the extension and development from the mean-variance theory which proposed by Markowitz. This paper studied the Mean-SAD (semi-variance deviation) model without the short selling and used the Chinese securities markets 20 stocks to test the efficient of the model. We got the conclusion that M-SAD model can effectively direct the decision in portfolio selection. Based on the result of the empirical research, the paper prospects the application of M-SAD model in our country.
Analysis on the Importance of Preliminary Work Based on Engineering Fixity
Authors: Ma Yan Ting , Ma Chun Jie
Published: August 2013

Since preliminary work has a great significance to engineering project, this paper analyzes construction organization methods taken in which by both Chinese and western countries base on the engineering fixity, and put forward a better organization method and improving direction for our engineering projects by comprehensive comparison of the similarities and differences between two areas.
Impact of Indirect Network Effect between Two Sides on the Diffusion and Pricing of Platform
Authors: Zhang Chuan , He Wei Da
Published: August 2013

Platforms diffusion is sophisticated because of indirect network effect between two sides; there will be a peak or several peaks of diffusion rate. Platforms diffusion can be divided to two stages: the stage before its take-off of potential market size and the stage after its take-off of potential market size. At the stage before its take-off of potential market size, platforms diffusion on one side has restriction in its diffusion on the other side. At the stage after its take-off of potential market size, platforms diffusion on one side accelerates its diffusion on the other side.
Control System of Smart Home Based on Cloud Computing
Authors: Guo Hong Liang , Kong Shao Ying
Published: August 2013

In the normal Smart home system, the hardware interface and the communication agreement were different from each other, so they cannot be used with a unified interface because the traditional home node was self-designed. An intelligent home control system based on cloud computing was proposed to solve this problem, the redundant processing ability of cloud computing was used, data storage and data analysis capabilities were used, data was collected by wireless ZigBee and transported to the cloud, a variety of protocols, interface and data processing were finished with cloud computing. The problem of disunion interface was solved with cloud computing.
Research on Sustainable Development Strategies of the Agriculture
Authors: Zhao Yan Na , Sun Yu Qiang
Published: August 2013

This paper introduces the Changes in agricultural production of Hebei Province from 1949 to 2011,firstly.Then We analyzed the factors that influence the sustainable development of Agriculture.Finally, we put forward some development proposals.We hope to have reference to the other provinces of the sustainable development of agriculture .
Pricing Strategy of Cruise Companies
Authors: Tan Hua Shan , Yang Yang
Published: August 2013

This paper researches the product pricing problems of cruise companies in the oligopoly market, discusses a cooperative game model and a non cooperative game model, and gives equilibrium results of pricing game between two oligopoly companies by analyzing the solution of models.
E-Portfolio: The Research for Similarities and Differences
Authors: Ma Jiong
Published: August 2013

With the rapid development of Internet. Web-based Learning became more convenient and rapid, People-centered Web-based Learning become possible now. Electronic Portfolio is such kind of a platform that to adapt the Web-based Learning for users to share, exchange, collaborative learning and assessment. The paper started from the concept and feature of Electronic Portfolio, and introduced some commonly used alternative platform for Electronic Portfolio. Compared and analyzed it from the angle of functions, features, support technology, users, storage and assessment.
A Probe on the SOA Solutions to the Systems of ERP, CRM and SCM in a Modern Media Group
Authors: Wang Ting Ting , Mao Zhi
Published: August 2013

The information integration of the modern media group can adopt the systems of ERP, CRM and SCM which are comparatively mature at present, but the architecture of the three systems has some inherent defects which are inflexible to the enterprise internal management change and the market change. As a result, it needs to be reformed based on SOA to adapt the development requirements that the modern media group needs.
PSO and OCCI-Based Grid Maintenance Scheduling Management and Optimization System
Authors: Liu Qian , Liu Wen Ying , Gao Guo Hua
Published: August 2013

Smart grid is an inevitable choice for the future development of the grid. Smart scheduling is one of the cores to build the strong and smart grid in China. Optimization and Management System for Grid Maintenance Scheduling is an in-depth exploration to achieve dispatching digitalization, intellectualization and visualization. This paper gives a rather detailed description about the functionality and implementation of Optimization and Management System for Grid Maintenance Scheduling. With received maintenance schedules as the basic data, OCCI-based data processing techniques and PSO-based optimization methodology are adopted to achieve the standardization and intellectualization of the grid maintenance scheduling. Moreover, the maintenance schedules generated and related information are managed in a standardized way. The design from this paper together with its programs has been applied in practice, achieving satisfying effect.
Database Design of Merchandise Management System Based on SQL Server
Authors: Zeng Fan Jin , Li Hui , Ding Li
Published: August 2013

Merchandise management is an important part of enterprise management, information management system is an important means to achieve the modernization of management of goods. View of the current the existing in the construction which the merchandise management information system of problem, the database design, in this paper research SQL Server database management system under the support of in accordance with the database design flow carried out conceptual structure design, logical structure design and physical structure design. Conceptual structure design in part through the E-R model performance; Logical structure design part of the structural design of the choice of data types and relationships; Physical structure of the design portion of the disk hardware selection and index design. The content of this study, for the development merchandise management system to provide practical solutions for enterprises to strengthen merchandise management, improve the level of information is of great significance.
An Improved Distribution Network Reconfiguration Algorithm Based on Niche Discrete PSO
Authors: Chen Shu Heng , Chen Luan , Chen Yong
Published: August 2013

Based on Niche discrete PSO method, an improved algorithm, which is applied to distribution network reconfigu-reation, is proposed. Above all, the economic assessment model of reconfiguration, which encompasses line loss, voltage quail-ty, load balance and switch acting cost, is established. Then, with Niche operations embedded into the DPSO algorithm, an improved reconfiguration method is presented. Finally, the corresponding software system is realized and this improved algorithm is applied to a typical case. The experimental results have proved that the improved Niche discrete PSO algorithm is reliable and efficient.
New Logistics System with E-Commerce and Cloud Computing Technology
Authors: Yang Chun Lin
Published: August 2013

With the CPI keeps rising in some countries, some research institutions pointed out that one of the important reasons is the logistics. This paper come up with a solution Cloud Computing and E-Commerce technology to solve this problem. We researched into the costs of Chinese logistics. The purpose of this study is to use the Cloud Computing and E-Commerce technologies. The solution can substantially lower the costs of the logistics industry up to 30%. We have finished some nuclear technologies. The results suggest a widespread method to develop the logistics industry.
A Mathematical Model of Foreign Trade Enterprise Consolidated Financial Statement
Authors: Zhu Xiu Fang
Published: August 2013

Consolidated financial statements can reflect the comprehensive financial position and operating results of foreign trade enterprise group, reasonably determines the merger range of consolidated financial statements which is the key foundation work of preparing consolidated statements. In view of the problem that there is no specific provision of substantial control concrete measurement method of current new accounting standards, the paper takes nine enterprises of Shanghai with unclear merge reasons as sample enterprises. With their financial report from 2009 to 2011 as data sources, panel data model is applied to analyze the influence of merge scope change on sample enterprise book performance. The results show that the consolidated range changes may improve enterprise book report data, and the average value of book achievement influence is about 5.43%.
Preliminary Discussion on the Constructive Meaning of Fitness Project for Peasants
Authors: Zhang Xiao Cheng
Published: August 2013

In the process of comprehensively developing a well-off society and building a socialist harmonious society, Three Agricultural Problems is the top priority of the work of the party and the country, among which health problems of farmers are closely watched by the community. In this paper, methods of literature, expert interviews and data statistics were mainly used to systematically discuss the meaning of Fitness Project for Peasants, hoping to promoting the construction of Fitness Project for Peasants.
Acceleration Control for a Plug-in Series Hybrid Electric Vehicle
Authors: Chen Ze Yu , Yang Ying , Zhao Guang Yao , Li Xue Jiao
Published: August 2013

Acceleration control using fuzzy logic is investigated in this paper for a plug-in series hybrid electric vehicle in order to improve the vehicle response to drivers demand. The transient process of acceleration is mainly considered in this research. Fuzzy logic is used for motor transient torque control according to drivers input and vehicle velocity, outputting a regulatory factor to increase motor torque transiently when drivers acceleration pedal is pushed down deeply and to reduce the torque increment when acceleration process is close to over. Performance of fuzzy control is tested by MATLAB simulation. Simulation results indicate that the presented fuzzy algorithm is feasible and effective for improving vehicle acceleration ability without damaging stable velocity control characteristic; in simulation, vehicle acceleration time of 0-100km/h has been reduced by 2.4 seconds.
Study on Structural Optimization and Servo Control for All-Electric CNC Broaching Machine
Authors: Chen Guo Jin , Ni Jing , Liu Ting Ting , Xu Ming , Lin Lu Gao
Published: August 2013

With respect to the conventional hydraulic broaching machine, the all-electric CNC broaching machine has many advantages. This paper combines the digital servo control system, the double ball screw and the linear motion rail to realize broaching for the two workpieces internal threads of the different rotations and lead distances. The DSP-based full-AC drive control system was developed. The observer is used to observe the speed instead of measuring the speed using the velocity sensor such as the encoder. It solves the drive control problems for the speed-sensorless servo-motors. That is in line with the trend of the CNC broaching machine technology toward the electronization, high-speed and preciseness.
An Autonomous Underwater Vehicle for Competition
Authors: Tian Hai , Hu Bo , Liu Can Yu , Xie Guo Chao , Luo Hui Min
Published: August 2013

The research of this paper was derived from the small autonomous underwater vehicle (AUV)Raider well performed in the 15th International Underwater Vehicle Competition (IAUVC),San Diego. In order to improve the performance of underwater vehicle, the control system of performance motion played an important role on autonomous underwater vehicles stable motion, and the whole control system of AUV is the main point. Firstly, based on the motion equations of six degrees of freedom, the paper simplified the dynamical model reasonably in allusion; Due to the speed of Raider to find the target was very low, this paper considered the speed was approximately zero and only considered the vertical motion. Therefore, this paper established the vertical hydrodynamic model of Raider, obtaining the transfer equation of vertical motion. Through the experiment and Matlab/Simulink simulation, this paper got the actual depth of the step response curve and simulation curve, and verified the validity of the vertical hydrodynamic model and the correlation coefficient.
Design and Implementation of Intelligent Card of Jet Loom
Authors: Zhang Gen Shan , Zhu Jie , Chen Wei Hua
Published: August 2013

For the loom production management in textile enterprises is lack, and data collection of the looms production process need solve, then textile industry requires the automation of data management, then a card read-write facility has been developed based on USB. The paper introduces the process that Card uses the bus to read and write, and demonstrates the communication process between USB bus and personal computer. It is found that the communication method can obviously improve the speed of data gathering between computer and Card, which guarantees the reliability and stability of system.
Acoustic Parts in Vehicle Sound Transmission Loss Test Method Research
Authors: Wang Xiu Feng , Shi Jie
Published: August 2013

The sound transmission loss (STL) of the acoustic parts in the vehicle was proposed to be computed using the Sound Pressure Level measured at the several locations inside the vehicle and the transmitted Sound Intensity Level on the vehicles exterior panel, which the acoustic treated vehicle passenger compartment is assumed as a small reverberation room. The necessary parts retrofits and acoustic treatments for Sound transmission loss tests of the acoustic parts in the vehicle were listed. The values of the appropriate number and positions of the loud speakers, microphones and sound intensity probes for Sound transmission loss of the acoustic parts in the vehicle were recommended. The in vehicle sound transmission loss tests of the acoustic parts such as the doors, carpets, wheel house etc. were achieved in the semi-anechoic room. Based on the door system, the correlation work has been done among the methods of the proposed in vehicle STL test, the reverberation - semi-anechoic chamber buck STL test and SEA analysis.
Research on the Anti-Interference Tactics of Substation Automation Equipment
Authors: Gu Xiao Jia , Liu Yun , Lin Yi
Published: August 2013

The substation automation equipment are mostly in the bad electromagnetic environment, all kinds of interference can be through different pathways to automation equipment, have a lot of garbage information, may cause many serious problems. To solve the problems of interference is directly related to the safe and stable of substation operation. This paper puts forward several effective anti-interference measures from suppressing interference source, cutting off electromagnetic interference transmission and improving the anti-interference ability of the system.
The Smart Transporting Water Design of Moblile Robot Based on KINETIS K10
Authors: Zong Kai , Chen Yu Rong , Wang Feng
Published: August 2013

The system is the transporting water mobile robot based on Kinetis K10. In this paper, the hardware circuit and system software are designed reasonably to achieve the robot transport water from origin to destination. The mobile robot can transport water along the black guide lines (any shape) forward and backward. A Kinetis K10 MCU is adopted as the main controller, which is developed by Freescale Semiconductor Company. The line walking, LCD display, water level detection, water storage, water transporting and water pumping are designed detailedly in the smart carring water system.
Research on the Bearing Fault of PSM Induction Based on the Rigid-Flexible Coupling & Virtual Prototyping
Authors: Chen Wei , Jia Qing Xuan , Sun Han Xu , Nian Si Cheng
Published: August 2013

To solve problem of bearing fault for parcel sorting machine (PSM) induction station system (ISS), a method based on the Rigid-Flexible Coupling and Virtual Prototyping is proposed. Firstly, the ISS structure is analyzed, and then built the model for the induction station and bearing Respectively. Finally, several typical faults for induction station bearing are simulated and compared with the theoretical values. Simulation results show that the method can improve diagnosis accuracy and decrease recognition uncertainty.
A New System of High-Precision Absolute Laser Interferometer Distance Measurement
Authors: Zhang Chen Yang , Li Bing
Published: August 2013

With the improvement of precision in various fields, we present a new method for the measurement of the absolute distance of a remote target based on the laser interferometry technique. In this paper, we obtain the interference fringes change information (the distance information) with the help of laser scanning with different frequency. It does not require the target to move in the direction of measurement. We have done experiments to compare this new methods results with the results of RENISHAW interferometer. Its improved that the accuracy of distance measurement is 10-4~10-5 relatively.
Effect of Boron-Nitrogen Containing Modified Soybean Oil Lubricating Additive on Friction and Wear Behavior of Steel-Steel and Steel-Aluminum Alloy Systems
Authors: Fang Jian Hua , Chen Bo Shui , Wang Jiu , Wu Jiang
Published: August 2013

A type of new environmentally friendly lube additive---boron-nitrogen modified soybean oil was synthesized and characterized by infrared spectrum. Its effect on the friction and wear behavior of steel-steel and steel-aluminum alloy systems were investigated with a four-ball machine and an Optimol SRV friction and wear tester respectively. The morphographies of the worn surfaces were analyzed by means of scanning electron microscopy (SEM).The worn surfaces of the 2024Al alloy block were analyzed by means of X-ray photoelectron spectroscopy (XPS).The results show that the type of modified soybean oil as additives can obviously decrease the wear rate and friction coefficient of steel pair and steel-aluminum frictional pair. Its lubrication mechanism is inferred that a high strength adsorption film and/or tribochemistry reaction film on the worn surface of the Al alloy due the carrier effect of a long chain soybean oil, high reaction activities of nitrogen, electron-deficient of boron and their synergisms.
Development of Online Oil Control Valve Detection System
Authors: Zhu Yu Tian , Wu Hao , Liu Zhao
Published: August 2013

An online detecting system is developed to check the function of oil control valve. This system consists of hydraulic detecting platform, signal collecting, signal processing and upper computer. It uses a domestic controller as the main control unit and the control program is developed. The signal conditioning board and the software of upper computer within LabVIEW environment are developed. By using this system, the signals of all sensors can be collected, conditioned, displayed and recorded quickly. The application shows that this system has been proved with the characteristics of high speed, high automation and detection precision.
The Parameters Measurement of the Network Performance
Authors: Li Xia
Published: August 2013

By using active method of injecting test flow data into the network the parameters of throughput, bandwidth, delay jitter, packet loss can be gained, UDP network performance of the single network segment can be tested. According to the measurement results, the network should be properly distributed for the access connection number and allocation of bandwidth for each client to improve the network performance.
Parametric Design of Grid Plate Type Peanut Picking Machine
Authors: Hou Jun Ming , Yang De Xu , Qu Yan Tao , Gao Lian Xing
Published: August 2013

According to the design theory, two section type peanut harvesting characteristics is studied. A suitable northeast harvesting peanut picking machine is developed. It is applied with half feeding form according to the Liaoning advocate. A division 'Tangyou' series peanut harvesting style is applied for the design. The calculation of correlative parameters is made, the organization form defined, and the main structure was analyzed. The results show that the design of machines meets the peanut picking requirements. And in the fruit picking process to achieve the low damage rate, it can completely adapt to the requirements of the rural northeast.
Application of Computer Control in the Angular Distortion Measurement System
Authors: Zhang Ming Hui , Zhang Yao Yu
Published: August 2013

A new real-time angular distortion measurement system, composed of devices i.e. the photoelectrical auto-collimating collimator and the reflex light-tube installed on deck, is developed in this paper. Real-time measurement of vessels bi-dimensional angular distortion is achieved by using this computer control system. Two video signals of photoelectrical auto-collimating collimators are received by the computer control system, and real-time image processing is done to obtain the dynamic miss distance. Then relative distortion of vessel is calculated by overlying measuring results of these two-way images.
Multi-Scenario Based Generation Scheduling of Power System with Wind Farms
Authors: Dong Lei , Yang Jian Kang , Pu Tian Jiao , Zhou Hai Ming
Published: August 2013

Wind power penetration to power systems is increasing rapidly in the recent years due to its environmental benefit, while wind power fluctuation also brings some problems to power system operation which impacts the generation of conventional power units. For this reason, probabilistic optimal dispatching model based on multi-scenasio is developed in this paper. With the discretization of wind power fluctuations range, the scenario probability can be get by discretizing wind power prediction error distribution curves, at the same time considering the relevance of the prediction error of the adjacent periods in the time scale. By means of leading probability adjustment costs into objective function, the optimization result can consider the cost due to the fluctuation of wind power. The rationality and effectiveness of the proposed method is verified by testing and demonstrating IEEE-39 bus system with a wind farm.
Influence of Icing to the Corona Loss Characteristics of the AC Power Transmission Lines
Authors: Zhu Jun , Xu Zi Qiang , Geng Qing Zhong , Liu Yun Peng , Geng Jiang Hai
Published: August 2013

The transmission line corridor will inevitably cross the icing area in China. Icing will influence the corona characteristics of transmission lines. In order to deeply analyze the influence law of the icing to corona loss characteristics, an icing test platform that can be utilized to simulate icing conditions was built. Icing test was done in the corona cage of 1.8m×1.8m×4m. Through changing the conductivity of freezing water and the length of icicle, corona loss of the icing conductor was measured and the surface electric field was also simulated with the software ANSYS. The results show that the length of icicle is an important factor affecting the corona loss of the AC conductor and the conductivity of freezing water on that impact is not obvious. Owing to the icicles, the distortion of the conductor electric field is serious. With the increase of icicle length, conductor corona loss value increases significantly. When the length of icicle increases to about 18mm, the increase of the corona loss value is no longer obvious trending to be saturated . The simulation results coincided with the experimental results very well.
Research on the Optimal Dispatching Strategies of Power System with Large-Scale Wind Power
Authors: Li Lin Chuan , Wang Kun
Published: August 2013

Large-scale wind power connected to the power system is a challenge to the traditional dispatch mode which is based on the accuracy of load forecasting and the accessibility of power, how to deal with the randomness and volatility of wind power has become a new problem facing the dispatch of power system. In this paper, an optimal power flow model with the goal of minimizing the total generation cost is established under the environment of generation market. Consider a variety of power supply in the system, the hydro and wind power should be preferentially used; Thermal power units bid for the capacity which is determined when wind power reach its maximum output at the minimum equivalent load time, and then whether the booting units can satisfy the load is checked at the maximum equivalent load time, if not, wind power will be curtailed to boot new thermal units until the load is met. Finally the example shows the feasibility of the dispatching strategies.
Modeling for Segmented Tracks Planning of Roadway-Powered Electric Vehicles
Authors: Tian Yong , Xia Bi Zhong , Sun Yue , Xu Zhi Hui , Sun Wei
Published: August 2013

Electric vehicle has aroused peoples concern with soaring energy crisis and environmental degradation. However, it has not been widely used due to some drawbacks, such as the short driving range, long charging time, frequent charging requirements and high price. In order to solve these problems, the roadway-powered electric vehicles (RPEVs) based on an inductive power transfer (IPT) has been proposed. In the segmented RPEVs system, efficiency and annual cost are affected by the track distance, tracks interval, number of tracks and installed capacity of each track, etc. Aiming to such problem, the nonlinear programming (NLP) model for segmented tracks planning of RPEVs system is studied in this paper. Meanwhile, the relationship between the system efficiency and the number of loads is analyzed as a cogent argument to the application of segmented tracks.
Studies on Phased-Array Radar Jamming and Simulation System
Authors: Li Li Xin , Hao Yan Zhong , Chen Hui , Liu Yan Chun , Liu Hui , Li Ming
Published: August 2013

Analyzing the current developing status and actual problems of radar system simulation, based on continuous system simulation, combining signal simulation and function simulation, considering current development of simulation technique and the request of air battle to EW, the simulation system of phased array radar based on MATLAB/SIMULINK is presented and designed, which conquered the contradiction between simulation precision and real-time characteristic. And the key techniques of composition, modeling and exploitation of modules are studied in-depth. The simulation system is checked and tested by illustration of one jamming to phased array radar system in the end. Simulation is carried out whose result verifies the efficiency. The successful exploitation of the system will supply the analyses evaluation of the whole simulation system efficiency with platform and basis, which has instructive sense for the tactical use and simulation of phased array radar.
Research Based on Template Matching Technologys Sandbox Sand Body CT Image Processing Methods
Authors: Ren Xu Hu , Bai Jin Qiang
Published: August 2013

Based on analyzing and discussing the sand body CT fault image features in tectonic physical simulation experimental sand box, some technical schemes and methods of sand body CT image processing are proposed. By comparing the results of different image enhancement algorithms, image filtering algorithms for sand body CT image processing, the processing accuracy and efficiency of these methods are analyzed. On this basis, aiming at the characteristics of sand body CT sequence images, such as blurs, poor quality and obscure boundary between the layers, an improved template matching algorithm is proposed. The new method can effectively reduce the noise, strengthen the image characteristics, and extract effective sand layer mark lines more integrally.
Stiffness Optimization for Springs in a Gun Cartridge Retaining Mechanism
Authors: Chen Long Miao , Qian Lin Fang , Zhao Rui Xue
Published: August 2013

To prolong the life of cartridge retaining pawl and link stopper in a gun cartridge retaining Mechanism, three compression springs stiffness are reduced via design study and optimization design based on dynamic analysis. Presenting the load of shell on a typical stage while entering-bore, differential equations of motion in this mechanism are established. With translational velocity of shell as the design variable, a design research and simulation analysis are made. And the relationship between shell velocity and proper shell-feed is acquired. An evaluation function is built using springs stiffness with preference-selection. With this evaluation function as the optimum objective, spring stiffness as design variables, and proper shell-feed as constraint condition, the minimum of three spring stiffness is obtained after calculation. The results indicate that compared with the original design parameters optimization results, are significantly improved with the stiffness decreased separately by 20.27%, 11.99% and 6.86%.
OPNET Network Simulations Based on the Performance of WLAN IEEE802.11
Authors: Yi Tian
Published: August 2013

This paper mainly focus on the modeling and simulating of WLAN (the wireless local area network) IEEE802.11. Based on the current research of IEEE 802.11 protocol and the most powerful network simulation tool OPNET, the paper introduces various behavior of WLAN and standards for WLAN. Research on CSMA / CA(Carrier Sense Multiple Access / Collision Avoidance) and a simulation study of optimization algorithm to the binary backoff time are conducted, DCF(Distributed Coordination Function)-based access solutions are analyze. The simulation of MAC(media access control) and PHY(Physical Layer）functional design and algorithm theory have been carried out. It can be seen from the simulation result that the theory of optimal design reduces network latency and packet loss rate, and improve the system throughput, which has an important reference value for the future deployment of WLAN IEEE 802.11 standards.
Reachability Analysis of Perception Layer Scheduling for IoT
Authors: Ji Jing , Liu Gui Xiong , Wu Li Ming
Published: August 2013

In this paper we present a method of reachability analysis for Internet of Things (IoT) perception layer scheduling. First, the model of perception layer information flow and behavior is formed. Because perception network is a system with coexistence of discrete events and successive events, so we use hybrid dynamic logic modeling approach to form the information perception model; Then inequality proving theory, semi-algebraic system and related tools Discoverer soft package are used to give reachability analysis of the model of perceptual system, and the feasibility of this method is verified by the vehicle condition monitoring system application.
CMM Based Requirement Engineering Model in Software Development
Authors: Li Yan
Published: August 2013

Requirement engineering is the basis of software development, and it is a key factor determines whether a software development can be successful or not. This article first presents the requirement engineering at capability maturity model (CMM). Then the problem in demand development and demand management are discussed in the second section. Finally, a CMM based requirement engineering model is presented. This model provides a more efficient and effective method in requirement engineering. As the most important parts of this model, requirements analysis, form requirement document, review requirement and change control are described in detail.
A Fast Scheduling Algorithm for Multiple User MIMO-MRC System
Authors: Tang Dong , Lv Ming Xia
Published: August 2013

When multiple users share the same channel at one time, the total throughput of the communication system can be maximized by allocating the common radio resource to the user or the user group having the best channel quality at a given time and the multiuser diversity gain can be obtained. The object to select the users in the best group is to select the users with the maximum sum capacity. Because of the co-channel interferences among the users, user in the best group is often not the user with the best channel quality when only does it transmit to the base station. As for a scheduling algorithm, exhaustive algorithm is to search the whole possibilities of the user group and is an approach that can get the largest capability of the system by multi-user scheduling. However, this algorithm is quite complex and usually brings huge workload to a base station with multiple antennas, hence the cost of operation to a base station has substantially increased. We propose a fast user selection algorithm with low complexity to reduce the computational complexity of the scheduling algorithm. From the simulation results, this algorithm not only decreases the computational complexity of the scheduling algorithm but also retains large capability of the MIMO system.
Design of a Confidentiality and Access Control Solution for Content-Based Publish/Subscribe Systems
Authors: Wang Chen , Liu Yuan An , Gao Jin Chun , Ma Xiao Lei
Published: August 2013

Content-based publish/subscribe (pub/sub) is a promising paradigm for building asynchronous distributed applications. As the number of participants in the network increases, an important issue we need to consider is the privacy of the data transmitted over the pub/sub network. When such sensitive information is being sent, it should be possible to control how the data is disclosed and to whom. In this paper, we address the issue of encrypted access control in a publish/subscribe system that provides content-based routing through advertisement messages. We show that our approach can effectively improve the system's safety performance without full trust network support.
Optimizing for Lead-Bismuth Fast Reactor Guard Vessel Thickness
Authors: Huang Mei , Tang J.N. , Ma Juan , Yuan Hao
Published: August 2013

In this paper, the thickness of lead-bismuth fast reactor's guard vessel is optimized. The thickness of vessel shell and the thickness of skirt support are chosen as two variables, the effect of thickness on the stress, deformation and thermal stress is considered and the optimal thickness is found.
Based on ANSYS Workbench High Speed Electricity Spindle Dynamics Characteristic Analysis
Authors: Song Xiao Hua , Wu Shao Long
Published: August 2013

This paper describes the inherent characteristics, dynamic response and dynamic stability dynamics of vibration capability that impacts of high-speed electric spindle. Taking the high-speed, high-power electric spindle milling center on as the object of the research, modal analyzing of electric spindle with the finite element software ANSYS Workbench, researching the spindle modes, natural frequencies and critical speed of electric spindle, to get each frequency and vibration type, pointed the affection of what spindle away from the anti-vibration frequency requirements, well before bearing stiffness and damping of the vibration to the spindle system. It provides the necessary basis for further dynamic analysis by modal analysis.
The Research of the Water Quality Prediction Model for the Circulating Cooling Water System
Authors: Gao Qiang , Ma Tian Lu , Li Jun Fang , Li Chen Guang
Published: August 2013

Aiming at the common quality faults of scaling and corrosion in circulating cooling water, water quality index were often used to determine the scaling and corrosion of circulating cooling water quality trends. Prediction model of corrosion and scaling rate was built based on BP Neural Network in this paper. The optimal initial individuals were written into the network operating system to optimize the disadvantages of weights and thresholds in BP neural network based on genetic algorithm. The prediction function would output after the network training after comparison of predicted and actual values of the model. The performance of the actual situation was verified to match the model prediction.
The Model of Thermal Ignition of Gasoline-Air Mixture
Authors: Ou Yi Hong , Jiang Xing Sheng , Qian Hai Bing , Wang Dong , Liang Jian Jun , Du Yang
Published: August 2013

The purpose of this paper is to find a efficient model to simulate the thermal ignition of gasoline-air mixture. First, Detailed chemical reaction model of gasoline-air mixture thermal ignition is discussed. that is, chemical reaction chains of controlling of thermal ignition are got according to the characteristic of gasoline-air mixture; through sensitivity analysis of temperature and species concentration, reaction equations are selected within a certain temperature range; based on the relation between chemical reaction rate of species and thermodynamic parameters, both the rate of species consumption or production and the heat release rate of species chemical reaction are got. Then using low mach, compressible equation as control equations, coupling the detailed chemical reaction model and radiation model, the mathematical model of gasoline-air mixture thermal ignition process, namely comprehensive model,has been established on the basis of unification of chemical kinetics and thermodynamics in this paper. In the end, taking gasoline-air mixture thermal ignition due to contacting with hot wall continuously where temperature is raising in a confined insulation space as example, this paper complete the numerical simulation analysis based on the comprehensive model. The result is demonstrated by the experiment data.The research result shows that the comprehensive model, in which fluid field, boundary conditions and detailed chemical reaction control together is efficient for gasoline-air mixture thermal ignition.