bluuebunny/crossref_metadata_2025 huggingface dataset:
Barrier Properties of Printed Composite Zinc Phthalocyanine/Fullerene Sandwiched between Indium Tin Oxide and Alluminium Electrodes
Authors: Zmeskal Oldrich , Pospisil Jan , Altsmid Jakub , Nespurek Stanislav
Published: August 2013

TO/ZnPcSu-PCBM/Al heterostructure was prepared by ink-printing and studied by DC (current-voltage characteristics) and AC (dielectric spectroscopy) techniques (ZnPcSu means 3-diethylamino-1-propylsulphonamide substituted Zn phthalocyanine, PCBM phenyl-C61-butyric acid-methylester fullerene). At the Al contact a Schottky barrier was formed. To explain the shape of current-voltage characteristic two effects had to be taken into account, emission effect, overcoming the potential barrier effect, formed by the superposition of the image Coulombic, space-charge and external potentials, by charge carrier. Dielectric spectroscopy made possible to determine effective lifetime of charge carriers and characteristic time related to electron diffusion; lifetime of charge carriers was τd = 2.10-5 s, and the electron mobility was of order 104 cm2V-1s-1.
Influence of Discharge Gas Pressure on Structural Properties of SnO2 Thin Films Deposited by Reactive Magnetron Sputtering
Authors: Shen Yan Bai , Wei De Zhou , Liu Wen Gang , Gao Shu Ling , Cui Bao Yu , Han Cong , Li Ming Yang , Zhang Rui Yang
Published: August 2013

The influence of discharge gas pressure on the structural properties of SnO2 thin films deposited by reactive magnetron sputtering at room temperature was investigated by X-ray diffraction, field emission scanning electron microscopy, and by the measurement of film density and physical adsorption isotherms. As the pressure increased, the grain size increased and the crystallite size decreased; simultaneously, a void structure developed, and the film became porous, indicating a lower film density. According to the results of physical adsorption isotherms, the effective surface area and the porosity increased with increasing discharge gas pressure.
Preparation of Thermochromic Vanadium Dioxide Thin Films by Pulsed-Magnetron Sputtering
Authors: Xu Min , Wang Jie Bing , Li Lin , Wu Chun Hua , Zhao Yin Zhong , Zu Hua Pin
Published: August 2013

High quality VO2 films have been successfully deposited by pulsed magnetron sputtering. In the preparation of vanadium dioxide films, the stoichiometry, structure and orientation of vanadium dioxide can be influenced by the process parameters. In this study, sputtering power and oxygen partial and substrate temperature were controlled accurately during experiment. Between X-ray diffraction and X-ray photoelectron spectroscopy were used to analyze the composition, phase structure, crystalline and valence state of the film. Atomic force spectroscopy was used to identify the film surface morphology. Electrical transition characteristics were also measured by four probes. Thermal radiative property was measured on a Calorimetric Emissometer. These investigations reveal that VO2 films have high purity, monophase and the sharp variation of resistance of films from semiconductor to metal state at 293K~373K temperature. Thermal emissivity of VO2 films vary widely from 0.82 to 0.35, which can meet requirement of future space thermal design.
The Preparation of Polyamide/Polyacrylonitrile Composite Hollow Fiber Membranes for Pervaporation
Authors: Tsai Hui An , Chung Li Han , Lee Kueir Rarn , Lai Juin Yih
Published: August 2013

This paper prepared polyamide (PA)/polyacrylonitrile (PAN) thin-film composite hollow fiber membranes via interfacial polymerization by using triethylenetetramine (TETA) and trimesoyl chloride (TMC) as the monomers and asymmetric PAN hollow fiber membrane as the substrate. The effect of hydrolysis of asymmetric PAN hollow fiber membranes on the chemical properties was investigated. The results showed that the chemical properties of PAN hollow fiber membranes were affected by hydrolysis. Moreover, the effects of PA thin film polymerized onto the inner and outer surface of asymmetric PAN hollow fiber membranes on pervaporation performances were also investigated. The results also revealed that the interfacial polymerized PA/PAN composite hollow fiber membranes that were polymerized onto the outer surface of asymmetric PAN hollow fiber membranes can be used in the pervaporation of aqueous alcohol solution.
Influence of Fly Ash on Thaumasite Form of Sulfate Attack in Cement-Based Materials
Authors: Li Chang Cheng , Jia Fu Jie , Wu Xu Nan
Published: August 2013

A low temperature sulfate attack research was carried out to investigate the effects of fly ash on thaumasite form of sulfate attack (TSA) in cement-based materials. Cement-limestone-fly ash samples were immerged in 5% magnesium sulfate solution at (5±2) oC. The appearance of samples was observed, and strength was also tested. Besides, the corrosion products were analyzed by infrared spectrum (IR) and X-ray diffraction (XRD) methods. Cement was equally replaced by fly ash with 20%, 30%, and 50% proportions. The results show that: Effects of fly ash on TSA were closely related to the composition, content and fineness of fly ash. Fly ash with an activity index larger than 80% could improve the resistance to TSA in cement-based materials when the replacement reached 50% while fly ash only played a minor role in early stage with 20%-30% content.
Prediction Model and Relationship of Compressive and Tensile Strengths for High Performance Concrete
Authors: Iqbal Khan Mohammad
Published: August 2013

Analytical models for compressive strength and tensile strength of high performance concrete are presented. High performance concrete was developed using binary and ternary blending combinations consisting of ordinary Portland cement, pulverised fuel ash and silica fume. Pulverised fuel ash and silica fume were incorporated as partial cement replacements for the preparation of various combinations of blended systems. Compressive strength and tensile strength of concrete containing ordinary Portland cement, pulverised fuel ash and silica fume at various ages are reported. Based on the experimentally obtained results, analytical prediction models were developed. These models enabled the establishment of isoresponse contours showing the interactive influence between the various parameters investigated.
Competencies of a Corporate Knowledge Manager
Authors: Maslov A.V.
Published: August 2013

The research is aimed at determining functions of company managers needed for innovative development of a company. The author gives original detailed recommendations about required types and functions of knowledge managers, describes their key competences and personal qualities. These functions are to encourage company employees to generate new ideas intended to improve work organization. The author applies system analysis to show companies demand in a particular type of knowledge managers. The research rests upon the thesis that social relationships of efficient management which arise in the process of collaboration in a company make the basis for developing job descriptions of specialists in knowledge management system.
Preliminary Risk Assessment in it Projects
Authors: Chernysheva T.Yu.
Published: August 2013

This paper examines approaches to preliminary risk management in IT projects. It states a need for a multi-level information system that would integrate all phases of the IT risk management cycle. We suggest using production rules to cluster risks and developing an integral risk assessment procedure based on the analytic hierarchy process.
Current Graphical Password Systems. Implementation Algorithms by Digital Watermarking
Authors: Shokarev A.V.
Published: August 2013

The paper considers current systems of user identification. The author proposes an algorithm of client-server system creation using the methods of steganography, in particular those of digital watermarking (DW) for user identification / authentication in various telecommunication systems. The use of the proposed algorithm makes it possible to create a stable system of identification / authentication and reduce the time of password memorizing and user authorization.
Method of Evaluation of Quality of Metal-Cutting Tool
Authors: Ostapenko M.S. , Vasilega D.S.
Published: August 2013

The method of estimation of quality of metal-cutting tool is developed. They determined consumer requirements, factors of use conditions, technical performance. They showed, that the temperature of cutting is the factor which connects al important features. The model of quality of collapsible lathe tools is created on the basis of it.
Modal Analysis of Linear Guide Way Junction Surface
Authors: Ren Sheng Le , Cheng Tian Yu , Dai Ye
Published: August 2013

Rails is an affordable, fixed, direct the mobile device. Among the many factors that affect performance, the rail surface is a very important factor. This article use test method gets the static stiffness of joint surface and the top five bands of the natural frequency and damping ratio for small linear guides. Test access to the static stiffness will be important in finite element analysis of input parameters. In the course of the study, analysis of dynamic performance of small - scale test guide, Study on Effect of surface characteristics on the structure of the component. By comparing the small guide the results of the analysis and the experimental results to verify the validity and accuracy of the analysis method.
Modeling and Simulation about TSP Based on Simulated Annealing Algorithm
Authors: Zhi Jian Zhuang , Yu Gui Bo , Deng Shi Jie , Chen Zhi Ling , Bai Wen Ya
Published: August 2013

The simulated annealing algorithm is applied on traveling salesman problem (TSP), which the genetic algorithm solving in while the earliness phenomena appear. Modeling and Simulation about TSP Based on Simulated Annealing Algorithm have been done. The simulation results have proved that the simulated annealing algorithm is better in searching in the global searching than the genetic algorithm.
Research on the Web Mining Algorithm Application in Tourism E-Commerce
Authors: Zhao Xue Song , Ji Kai Fan
Published: August 2013

Web mining algorithms are widely used in e-commerce. Tourism e-commerce develops fast in recent years in China but the application of web mining algorithms stays in low level compared with some developed countries. This paper first discusses two major web mining algorithms: the Association Rules algorithm and Clustering Analysis, and then analyzes the application of web mining algorithm in tourism e-commerce. It concludes that web mining algorithms can help tourism e-commerce to improve web design, increase online sales and provide better personalized services for web users.
Transient Source Two-Dimensional Source Item Inverse Problem Research and Accuracy Impact Analysis Based on the Differential Evolution Algorithm in the Wide/Shallow Watercourse
Authors: Huang Rui , Han Long Xi
Published: August 2013

Through the differential evolution algorithm, the transient source two-dimensional source item inverse problem in the wide/shallow watercourse is converted into the optimal control problem of the distribution system. Concrete steps that utilize differential evolution algorithm are given to carry out example analysis. The result show that the method could be used for the study of pollution sources identification .
Research on Route Planning of Cruise Missile Based on Improved Particle Swarm Optimization Algorithm
Authors: Ma Xiao Xiao , Li Tao , Qing Li
Published: August 2013

For the route planning problem of cruise missile, a method based on PSO is proposed and simulated. The route cost model is established which in-tegrates the terrain cost, the threating cost and the stratagem obviation cost. With the model, digital maps and battlefield information can be transformed to the grid space for route planning. For the premature defect in the standard PSO algorithm, a method based on similarity variation is proposed for route planning. Simulation results show that the searching effect of the improved algorithm is better than which of the standard algorithm in route planning, the improved algorithm can get better route.
An ELM Based Barcode Localization Algorithm
Authors: Wang Chun Cai , Li Ying Tao , Yang Yu Dong
Published: August 2013

Many applications have provided functions of automatic searching and reading barcodes in complex scenes with a camera. However state of the art barcode detection systems are limited to their serious requirement, such as shooting angle, light intensity and revolution. This paper proposes an effective solution for automatic barcode localization by exploiting ELM (extreme learning machine) and multichannel Gabor filtering techniques. We first employ Gabor filter to extract texture feature of the barcode, and then the barcode regions and the background region in texture image are use to train the ELM classifier. Finally, we apply our method to the barcode image database, which consists of several different barcode symbologies. Experiment shows our method is superior to the General morphology method and has desirable properties in accuracy, rotation invariance and robustness to noise.
Efficient Bounded Model Checking for LTL
Authors: Wang Rui , Fu Xian Jin
Published: August 2013

Bounded Model Checking is an efficient method of finding bugs in system designs. LTL is one of the most frequently used specification languages in model checking. In this paper, We present an linearization encoding for LTL bounded model checking. We use the incremental SAT technology to solve the BMC problem. We implement the new encoding in NuSMV model checker.
Simulation of VAV System Control Based on Improved Bacterial Foraging Optimization Algorithm
Authors: Li Chen
Published: August 2013

Considering the control characteristics of the variable air volume air-conditioning system and the deficiencies of BFO algorithm, this paper presents improved BFO algorithm, and applies it to the optimal adjustment of PID controller parameters of VAV air conditioning control system. The identification results show that the new PID control strategy improves the performance of the system by digital simulation in the circumstances of MATLAB/Simulink.
Relationship between Short Term Traffic Flow Chaos Fractal Properties and the Necessary Data for Prediction
Authors: Yin Gang , Chen Yu Feng
Published: August 2013

Analyze the traffic flow in multi-scale time window of a freeway by using the nonlinear analysis method such as Correlation dimension , recursive map and so on, we find that chaos and fractal still exist in wide observation scales. Traffic flow correlation dimension reduces when the length of time window increases, in the observation scale of minutes. However, traffic flow correlation dimension reduces when the length of time window reduces, in the observation scale of seconds, instead of fractal property disappearance as predicted before. We present that, from the view of prediction, the recording point which is 10 times of the correlation dimension is an essential length of the data to predict. The simple model we present, which includes speed difference between vehicles and observation scales of traffic flow, can explain some of the reasons of the traffic flow chaos.
Research on Performance Evaluation Based on Fuzzy Analysis
Authors: Zheng Zhao Hui
Published: August 2013

How to evaluate vocation education performance is one of the difficulties and hot research fields for the researchers related. The paper presents a new model for evaluating vocation education performance based on the principle of analytic hierarchy process and fuzzy comprehensive evaluation. First an evaluation indicator system of vocation education performance is designed through analyzing the characteristics of vocation learners behavior; Secondly in constructing the comprehensive evaluation model for vocation education performance, analytic hierarchy process and fuzzy comprehensive evaluation are combined and two level fuzzy evaluation is adopted to satisfy the dynamics, subjective and transitional characteristics of indicators and improve evaluation accuracy. Thirdly datum from three vocational colleges are taken for examples to verify the validity and feasibility of the model and the experimental results show that the model can evaluate vocation education performance practically and can help vocation education service providers take corresponding concrete measures to enhance its education performance.
A Novel Bi-Group Particle Swarm Optimizer for Speaker Identification
Authors: Xue Li Ping , Yao Ying Long , Zhou Hong , Cai Ping
Published: August 2013

The traditional training meshods of speaker codebook for speaker identification based on vector quantization are sensitive to the initial codebook parameters, and they often lead to a sub-optimal codebook in practice. To resolve this problem, this paper proposes a novel bi-group particle swarm optimizer (BPSO). It applies two sub-group particles with different particle update parameters simultaneously to explore the best speaker codebook, and the particles perform basic operations of particle swarm optimization (PSO) and conventional LBG algorithm in sequence, which can explore the solution space separately and search the local part in detail together. Information is exchanged when sub-groups are periodically shuffled and reorganized. Experimental results have demonstrated that the performance of BPSO is much better than that of LBG, fuzzy C-means (FCM), fast evolutionary programming (FEP), PSO, the impoved PSO algorithm consistently with higher correct identification rates and convergence rate. The dependence of the final codebook on the selection of the initial codebook is also reduced effectively.
GMDH Network Model Based on Simulated Annealing and Genetic Algorithm
Authors: Zhang Xiao Ling , Zou Li Kun
Published: August 2013

According to the traditional UMDH network modeling with the least square method to recognize parameters ,it's easy to fall into local minimum ,and with the result that the prediction effect is not ideal. This paper puts forward to combine the simulated annealing algorithm and genetic algorithm, and introduces the combined algorithm to the UMDH network which is used to identify some of its description type coefficient. In this paper ,it describes the simulated annealing genetic algorithm ,and constructs the UMDH network model based on this algorithm, and the model is applied to the simulation of debris flow prediction research ,forecast average relative error reached 3. 54%. The results show that the algorithm not only ensuring the global optimization but also preventing premature convergence, improve the UMDH network model of global and local searching optimal ability further.
Research on Background Modeling by Gaussian Mixture Model without Parameter Adjustment
Authors: Liu Hong Hai , Hou Xiang Hua
Published: August 2013

When modeling background model by Gaussian mixture model, there exist the defects that parameters can not be updated adaptively. In this paper, we adopt mean-shift algorithm to overcome these defects. Firstly, this paper introduces the initialized parameters, such as variance, mean, and weights and others, when modeling and then the parameters are constantly adjusted in the subsequent calculations. Then the statistical background model based on probability density estimation is put forward and using mean-shift algorithm updates the parameters adaptively. At last, the algorithm of mixture Gaussian background modeling method based on mean-shift is implemented. The experimental results show that the algorithm can effectively update parameters adaptively and the obtained background model is better.
An Optimization Path Planning Method Based on Evolutionary Artificial Potential Field
Authors: Li Fei Long
Published: August 2013

This paper presents an evolutionary way for the robot to plan path. The way is based on the Evolutionary Artificial Potential Field approach. APF is an efficient way for a robot to plan its path, and the evolutionary APF can help the robot to jump out of the local minimum point. A matrix is integrated in the new algorithm. The matrix can modify the direction of a robot when the robot is trapped in a local minimum point. The force which has been changed will prompt the robot to escape from the local minimum point. Simulation result shows that the optimized algorithm is an effective way to solve the local minimum problem.
The Model of Fuzzy Retrieval Based on External Index
Authors: Deng Lu , Han Wei Hong , Liu Dong , Xiong Ying
Published: August 2013

With the rapid development of the Internet, database is getting more and more attention for its advantages of high concurrency, high scalability and high availability. In order to solve the problem that how to retrieving the data in the database efficiently and accurately, a model of fuzzy retrieval based on external index is proposed in this paper. By this external index, the efficiency of the NoSQL databases retrieval whose column not be appointed is greatly improved. As an example, the Cassandra database is adopted to store the data and the external index is stored in the national databases. A community information management system is utilized to show the feasibility of the model. The results show that the model can save a lot of time in retrieval whose column not be appointed. Moreover, this model can also be used to some other NoSQL databases.
Application of Optimized Particle Swarm Algorithm on Apparel Intelligent Layout
Authors: Huang Can Yi
Published: August 2013

The core technology of apparel layout is the intelligent algorithm of apparel marker software, this paper puts forward an optimized particle swarm algorithm under the condition of comparing and analyzing the merits and drawbacks of genetic algorithm, simulated annealing algorithm and particle swarm optimization algorithm, in addition, a demonstration test is done by C++ under the environment of VS2007. The result concluded in this paper shows that the optimized particle swarm algorithm can achieve ideal material utilization.
CFD-Based Calculation of Regular Transverse Wave Force in the Maneuvering Mathematical Modeling Group (MMG) Model
Authors: Yang Lin Jia , Tao Yi Han
Published: August 2013

The accuracy of mathematical model has a great effect on the prediction of ships maneuverability. Wave disturbing force is an important element of the Maneuvering Mathematical Modeling Group (MMG). Building regression formula of wave disturbing force acting on the ship hull can not only increase ship mathematical models accuracy but also help to predict ships maneuverability. The wave force can be calculated by the Computational Fluid Dynamics (CFD) method, which is more accurate and economical. The 3D model of M/V YUKUN was established and the cut-cell mesh was made. A numerical wave tank was developed in this work, based on the FLUENT software. The calculation results were obtained with different height, length, and period of waves. After analyzing the calculated data obtained by the CFD simulation, a regression formula was built about the above parameters. Finally, after comparing the regression formula and tradition wave force model based on the slender body theory, it can be concluded that the regular transverse wave force regression formula of the YUKUN is valid and better to make simulation for the prediction on ships maneuverability.
Finite Element Analysis for Assembly Fixtures Based on ANSYS
Authors: Cao Wei , Zheng Guo Lei , Xu Jing Lin , Qiu Yi
Published: August 2013

Structure analysis is a vital link while designing aircraft assembly fixtures. ANSYS software is applied to analyze the structure of an aircraft assembly fixture based on a general method proposed in this paper. Firstly, a frame-type riveting assembly fixture is modeled, the static load and the boundary condition is preset according to the requirement of finite element analysis. Secondly, the static stiffness and strength is calculated considered both the condition with and without working load. Finally, the analysis and optimization process is conducted. The effectiveness and feasibility of this method has been proved combined with the simulation result and the reality test. The method can be applied to other aircraft assembly fixture when taking finite element analysis, thus it has the application and popularization value.
Research on the Preventive Measures of Sports Injury Based on Causality Diagram and Analytic Hierarchy Process
Authors: Zhou Zu Xu
Published: August 2013

Because of the frequent occurrence of injury accident in the sports curriculum, the security of physical education cannot be ignored. So, this paper analyzes the factors of injury accident in physical education teaching process and proposes prevention measures. The establishment of security system in physical education is an urgent problem. This paper studies the causes and countermeasures of sports injury accidents based on two methods: causality diagram and analytic hierarchy process. The first section introduces the principles of causality diagram and hierarchical analysis in detail. The second part of the article establishes mathematical model of the analysis method. The part three of the text investigates and analyzes the accident status and prevention measures of 100 primary schools and universities in Heilongjiang province in the form of literature researches and questionnaires. It also proposes weight coefficients and causality diagrams of Sports Injury Accidents using causal analysis theory. It converts causal diagram into a hierarchical model using the analytic hierarchy process AHP.
A Brief Talk about Fire-Fighting Equipment Management Based on Grid Technology
Authors: He Xiang Hui
Published: August 2013

This paper put forward the new idea of combining the fire equipment with grid technology.Through the establishment of a complete set of grid system, combining with database theory to complete the design of database about fire fighting equipment management system, initiatively updating information, it will be easy to achieve digitized management objects, the efficient management, and networked information processing.
Running OpenFOAM in High Performance Computer
Authors: Wei Ying , Sha Feng
Published: August 2013

In this article We analysis the CFD software named OpenFOAM and detailed testing its performance on high-performance computer, and we do analysis the results which provide a valid reference to the engineers. so there will be another choose of CFD software. We built a high performance computer to experiment the parallel performance of OpenFOAM with standard program, and the way we built the high performance computer also useful to the engineers.
The Research on Mining and Metallurgy Characteristic Information System
Authors: Guo Nian Qin , Zhu Hai Yan
Published: August 2013

Most of mining and metallurgy industries are the mining, metallurgical enterprises that are located in mountainous or remote areas and far away from the city, so the information resources are isolated. Especially for the information dynamic of the mining, the characteristic information resources of industry are more difficult to find. This system can realize the information integration of mining and metallurgy industry, provide the electronic trading and literature service, and realize the visualization of the ore dressing process flow by using virtual technology. The program was proceed using C# in this system, and the develop was proceed in the .NET platform, and the SQL SERVER2008 was as background database.
Optimization Study of Expandable Net Security State Evaluation Models
Authors: Fan Rong , Wang Xiao Jie
Published: August 2013

Net security state awareness provides a security management from macroscopic perspectives for managers, but the research on this field still lacks united recognition and rules. The paper bases on the research results of 5-Endsley, raises a kind of expandable model of net security state awareness and introduces the concept of state extract into the field of net security. In the process of dealing with state data, the model introduces space knowledge base to norm the state extract process, and builds models with state as the real objects. The models raised include attack rate, attack time and space information, which simplifies the state extract process, discusses the standards of state models and demonstrates the utility and efficiency by using real statistics to evaluate state models
Research on Intelligent Information Retrieval Based on Semantic Web Technology
Authors: Kong Shao Ying , Guo Hong Liang
Published: August 2013

According to the rapid development of the Internet and the increase of the network resources, it was very important to search the information resources for meeting the need of large ground of users. The key words were used as the indexes for retrieval with traditional method. But it couldnt reflect the real purposes and intentions of the users precisely. An improved information retrieval method based on the semantic web technology was proposed for carrying out the information retrieval work precisely and effectively. The mew retrieval system was not just recognizing the words simply, but it could comprehend the semantic ingredients of the words and sentences. The semantic web retrieval system was constructed eventually. Comparing to the traditional keywords retrieval method, the similarity degree was calculated in the simulation, simulation result shows that the retrieval precision ratio of new method increases by 15%, then the intelligent, efficient and accurate information retrieval system is realized successfully.
Analysis of the Multimedia Technology Influence in Basketball Game
Authors: Liao Hong
Published: August 2013

with the development of modern technology, the multimedia technology has been widely applied in social production and life. In order to keep the game fair and impartial, the multimedia technology such as data statistics and management, game image analysis has been used in basketball game. This paper discusses the basic concept of multimedia technology and analyzes the application of multimedia technology in digital image communication in basketball competition. Based on this, it analyses the influence of multimedia technology's application in the basketball game, and makes a conclusion that the application of multimedia technology promotes the development of basketball game, but the negative influence caused by human factors can not be ignored during the operating process.
Analyses about the Virtual Learning Community Based on the Internet
Authors: Gai Ling
Published: August 2013

As a new community model, virtual learning community has become a kind of brand-new exchange and knowledge sharing model in the Internet era. Based on the analysis of the information concepts of virtual learning community, summarize the elements of virtual learning community, puts forward the corresponding construction step, summarizes the construction characteristics and tasks of various stages, and points out the future development prospects.
Study on IPv6 Capabilities of Mobile Devices
Authors: Qin Gang , Chen Can , Yan Bao Ping
Published: August 2013

With the rapid development of Internet, the current Internet Protocol IPv4 cannot meet the new requirements. Compared with IPv4, IPv6 has more advantages. Fruitful results have been borne in aspects of IPv6 protocol study and network construction in China. On the other hand, application and popularization of IPv6 is far from sufficient. In recent years, mobile devices have popularized very rapidly. More and more people use mobile devices, including smartphones and tablets, to surf online everywhere. If such a gigantic amount of mobile devices can access network with IPv6, it will be very important for application of IPv6. In this paper, we first analyze the market of mobile devices to determine the devices to be tested. Then we introduce how to construct test environment and test cases. After that, we illustrate the test procedure. Then we summarize how the mainstream mobile devices support IPv6. At the end of this paper, we look forward the future work.
The Research which Succeed in Catching the Net Data Pack
Authors: Zhang Hao , Zhang Lin
Published: August 2013

Chaperonage network technique of continuously development, make ether net safety problem research more and more importance, involve a network safety the realm have many safety technique, like fire wall, invade examination, safety scan, agreement analysis etc., but these technique of realization all demand depend on a network data pack to succeed in catching. This text to under the system of the data pack succeed in catching a technique to carry on a research, and put forward a few data pack of succeeds in catching a method.
Application of GIS System in City Gas Pipe Network
Authors: Li Xing Quan , Liu Jian , Gao Si Jing , Guo Chang
Published: August 2013

The GIS system is a computer system consisting of software, hardware, and to describe the geographic information,and subsidiary information data. The underground gas pipeline is a new application field of GIS system, realizes the electronic and information technology infrastructure information management of gas pipe network, as the transmission and distribution scheduling, document management, network planning, network provides modern means of emergency decision, the daily operation management, construction management and auxiliary decision and other gas.
A Buidling Information Modeling Application on Mobile Device
Authors: Huang Zhuo Hua , Ma En Cheng
Published: August 2013

Building Information Modeling (BIM) has been one of the most promising developments in the architecture, engineering, and construction (AEC) industries. To extend the BIM technology and make it more collaborative, a specific application should be made for viewing and managing the model on mobile devices. Based on the authors study and development results, this paper presents a systematic solution on BIM mobile application developments and discusses some critical issues for solving the existed problems, such as the network-speed limitations, simplifications and transferring of the BIM models, as well as platform independence issues to develop well suited mobile applications.
University Network Engineering Professional Model
Authors: Han You Qian , Xu Xiu
Published: August 2013

Network engineering is the field of emerging technologies, and how to better provide the community with the talents currently on network engineering teaching mode design became the primary task to meet the requirements of the close combination of computer technology and communication technology. In this article from the goal to cultivate and improve students' ability to network engineering practice, in terms of network engineering curriculum reform, network engineering lab environment construction explore new era network engineering professional teaching reform ideas to improve students by enhancing the practical teaching links engineering capability and innovative quality of network engineering professionals.
Extension of Campus Network Based on Flat Network Architecture
Authors: Huang Jue
Published: August 2013

With the rapid development of the network technology, network architecture is towards to flat architecture form complex multi-floors architecture. According to the questions existed in original networks and new requirements proposed by customers, it completes the campus network reform plan and execution in Nanjing institute of industry technology. Adopt the new flat network architecture in the reform the network service quality has been improved observably.
Research of Typical VPN Network Management Mechanisms
Authors: Liu Zai Ying , Yang Ping , Zhang Li Xiao
Published: August 2013

VPN based on the internet can not only make some enterprises save a large amount of costs, but also has better scalability, security and reliability. The paper introduced the concept and classifications of VPN, and described the key technologies of IPsec VPN and MPLS VPN. At last, we put the emphasis on the VPN network management mechanism, including fault management, performance management and tunnel management.
The Application of QQ Group in Modern Educational Technology Course
Authors: Xu Ling , He Wei
Published: August 2013

The modern education technology course is a compulsory course of teacher professional in Colleges and universities, after years of teaching practice, the teaching content and teaching form has been relatively mature, but there are still some problems: the contradiction between class hour and teaching content; the limitations of communication between teachers-students and students-students, the lack of collaborative learning, etc. Put forward the way and scheme by using QQ group to solve the above problems.
Cloud Computing-Core Platform to Build Future Networking Data Links
Authors: Yang Juan , Luo Jian Lu , Cheng Fang , Yang Cong
Published: August 2013

In this paper,we analyzed the problems and challenges that US Army tactical data link system encountered when meeting the needs of network-centric warfare. On the basis of this, we put forward a new battlefield-oriented, demand-based, real-time serviced networking data link system---the joint data link system based on cloud computing, and discussed the key techniques in constructing the system. Simulation results show that the use of cloud technology in Joined Data Links can improve the system service level markedly.
Data Consistency Research of the Cloud Storage Environment Based on P2P Technology
Authors: Ge Jun Wei , Yang Feng , Fang Yi Qiu
Published: August 2013

Many of the characteristics of P2P technology such as decentralization, scalability, robustness, high performance and load balancing are in line with the cloud storage design requirements. In this article, it proposesd a cloud storage model based on P2P technology. This model uses multivariate data server architecture, which can effectively solve the bottleneck problem of centralized cloud storage system. Thereby increasing the cloud storage system performance and the quality of cloud storage services, enhance service reliability. In this article, through researching data consistency algorithm named Paxos and the model systems metadata consistency problem, we improve and optimize Basic Paxos making it applied in the model system.
BP Neural Network Model in the Application of Subway Drainage Cabinet
Authors: Liu Li Li , Si Wen
Published: August 2013

In view of the changeable characteristic of the stray current in subway system, introduced the artificial neural network BP model, using Matlab prepared a program of the BP neural network prediction mode to predict the current drainage cabinet exhaust flow .The simulation results show that the prediction model is simple and efficient to the automatic drainage cabinet drainage strategy in further promote.
Based on the Characteris of Learners Personalized-Learning System Design
Authors: Chen Hua Yue , Pu Jing
Published: August 2013

By using genetic algorithm to obtain the text characteristic, extracting user interests, and in which the author with personalized recommendation feature online learning system model.
RFID Security Authentication Protocol Based on Hash for the Lightweight RFID Systems
Authors: He Hong , Li Qi , Zhang Zhi Hong
Published: August 2013

In order to solve the RFID authentication protocols, a new mutual authentication protocol based on Hash for the lightweight RFID system is proposed in this paper. Compared with several RFID authentication protocols with the similar structure, the proposed protocol can effectively solve the privacy and security of the RFID system, and it has significant performance advantages. It greatly reduces the amount storage and computation of tags.
A Petri Net Based Public-Key Cryptosystem
Authors: Zhou Hui , Ding Zuo Hua , Huang Hong Yun
Published: August 2013

In this paper, we present a new method to build public-key Cryptosystem. The method is based on the state explosion problem occurred in the computing of average number of tokens in the places of Stochastic Petri Net (SPN). The reachable markings in the coverability tree of SPN are used as the encryption keys. Accordingly, multiple encryption keys can be generated, thus we can perform multiple encryption to get as strong security as we expect. The decryption is realized through solving a group of ordinary differential equations from Continuous Petri Net (CPN), which has the same underlying Petri net as that of SPN. The decipherment difficulty for attackers is in exponential order. The contribution of this paper is that we can use continuous mathematics to design cryptosystems instead of discrete mathematics.
Design of IR Converter Based on the CC2530 Chip in Zigbee
Authors: Chen Sai Wei , Ying Chao Jie , Chen Yu Jia , Jiang Xiao Ning
Published: August 2013

To improve the way of traditional remote control controlling home appliances and solve the problems of the traditional remote control, such as redundancies and inconvenience result from the "one on one" working mode, a new design was proposed to overcome this shortcoming, introducing the design and realization about how to construct the Zigbee network node and the infrared converter's main function module, which was working on "one on many" mode. It was based on embedded system technologies where CC2530 was used as the core of hardware platform.The design also realizes a friendly user interface based on PC machine.
A Compound Strategy to Optimize the Output Characteristics of Mid-Frequency Inverter
Authors: Wu Di , Wu Qi Jun , Zhu Rong Zhao
Published: August 2013

To improve the stability and output voltage quality of inverter, an new repetitive control strategy for 400Hz Constant Voltage Constant Frequency (CVCF) inverter has been proposed . Based on active damping, this strategy damps the oscillations on the output LC filter of inverter under unload or light load. Using state-observer to weaken the impact of time delay in digital control, a 5.5 kW one-phase 400Hz inverter prototype by this strategy has been tested.The result shows that low THD (about 1.5%) with inductive loads and fast error convergence (2 fundamental periods) can be achieved by this strategy which can be demonstrated to be brief and effective.
Design and Motion Simulation Analysis on Automobile Constant Velocity Universal Joints Driving Shaft
Authors: Huang Feng Li , Wang Li Jun , Lin Yong Qing , Zhao Yun
Published: August 2013

the automobile constant velocity universal joint driving shaft is the important component in modern cars, its design is mainly to check the movement compatibility of parts. The constant velocity universal joints driving shaft is designed by three-dimensional solid modeling software UG, and the motion simulation model is build by multi-body dynamics simulation software to investigate the constant speed performance of constant velocity universal joints driving shaft, and check the motion trace of steel ball which is the key component of constant velocity universal joints. The results show that the constant speed performance is good, and the track design of star-like inner race is reasonable.
Solving for Currents along Dipole Antenna with a Composite Grid Method
Authors: Ma Meng Da , Lu Gui Zhen , Guan Ya Lin
Published: August 2013

This paper presents the thoughts about application of composite grid method to solve for current distribution of the dipole.It discusses the basic principle of the method and calculation steps, compares the calculated results with the normal method (FEM) of single set of grid computing , and summarizes the application process and development direction in the future.
Application of Programmable Pre-Emphasis in LVDS Driver
Authors: Wen Guo Guan , Yi Qing Ming , Shi Min
Published: August 2013

As demand for data rate continues to increase, new problem of LVDS start to come out, such as signal integrity. Those problems are primarily caused by frequency-dependent loss in transmission line. The purpose of pre-emphasis is to apply intentional overdriving to the signal and get it back to the original signal with the proper weight, thereby compensating for the ISI from the nearby data symbol. In order to avoid over-emphasis we propose a programmable pre-emphasis adapting to different situation, and finish the prototype which can improve the transmission bandwidth more effectively, achieving high-speed data transmission.
The Research of Reactive Power Output of Doubly-Fed Induction Generator when Large-Scale Wind Power Integration
Authors: Liu Guan Qi , Shao Long , Guan Shou Shu
Published: August 2013

The technology of large-scale wind power connected to grid is a key technology in the application of wind power. However, the large-scale wind power will cause the negative effect on the voltage of grid. So, the regulation of reactive power is necessary, which can stabilize the voltage level of the grid. The doubly-fed induction generators (DFIG) themselves own the ability of providing reactive power. Considering the reactive power demand when the power grid is operating, and then rationally allocating static and dynamic reactive power compensation equipment, the operational efficiency can be improved. The particle analyzes the reactive power limit of DFIG, considering the limit of stator and rotor. In this way, the reactive power compensation capacity of DFIG is used first, the use of reactive power compensation equipments are greatly reduced, so the economy of the wind farm is obviously improved.
A Circuit for Improving DC-DC Converter Dynamic Response
Authors: Jia Gui Xi , Jiang He
Published: August 2013

To improve the disadvantage of DC-DC converter output voltage fluctuation when output current changes in wide range, a compensation circuit for improving DC-DC converter dynamic response was presented. The circuit was based on the theory of parallel or anti-parallel capacitor. A charged capacitor was paralleled when output current positive jumped. A charged capacitor was anti-paralleled when output current negative jumped. It worked when output current changed. So DC-DC converter dynamic response was improved and efficiency could be high in the same time. The simulation results proved that the effect of compensation circuit in improving the converter dynamic response and stabilizing the output voltage.
Design and Simulation of Numeral Soft-Switching ZVZCS-PWM Arc-Welding Power
Authors: Jia Gui Xi , Song Jia Tai
Published: August 2013

Zvzcs-pwm inverter combines the advantages of ZVS-PWM inverter and ZCS-PWM inverter, it can solve the problems of switching loses and extra circulation. Furthermore, it is provided with less duty cycle loss, small parasitic oscillation of the secondary side and large load rage conducted by soft-switching. A conjoint system based on MCU and DSP can make full use of the advanced ability of the event management, data processing and computing speed, which improves accuracy and real-time digital control of arc welding power. This paper introduces design of main circuit and control circuit of arc welding power and the working process of the zvzcs-pwm inverter. The simulation with matlab demonstrates the feasibility of the design.
Anti-Radiation Design and Irradiation Test of Antifuse FPGA
Authors: Zhang Kai Feng , Chen Shang Feng , Xiao Shan Zhu
Published: August 2013

Antifuse FPGA because for its low power consumption, high reliability, high security, etc., are widely used in space electronic systems. However, antifuse FPGA running in the space environment is also vulnerable to space radiation. This paper analyzes the single event effects in antifuse FPGA in detail and put forward the TMR and EDAC anti-SEE hardening design and implementation methods. The ground heavy ions accelerated test is conducted to verify the design of hardening; test results and analysis show that the hardening design method can effectively improve the COTS antifuse FPGA for space applications reliability.
New Applications of the Wireless Meter Reading System-Wireless Automatic Routing
Authors: Li Xing Quan , Liu Jian , Guo Chang , Gao Si Jing
Published: August 2013

Aiming at the disadvantages of remote automatic meter reading way of the cable, this paper proposed wireless automatic wireless technology which based on the ZigBee technology and explained the key issues of wireless automatic routing mechanism, this mechanism has been applied in the wireless gas meter reading system, and operation effect is good.