bluuebunny/crossref_metadata_2025 huggingface dataset:
The Construction and Performance of a Novel Intergroup Complementary Code
Authors: Huang Wen Zhun , Wang Ying , Zhou Zheng Guang
Published: December 2012

Based on the analyses of intergroup complementary (IGC) codes and zero correlation zone complementary codes, novel IGC codes were proposed to adapt M-ary orthogonal code spreading spectrum system or quasi-synchronous CDMA system. The theoretical research and simulation results show that the main advantages of novel IGC are that under the same code length, the number of the novel IGC code sets are more than that of the intra-group IGC codes; the length of the zero correlation zone is longer than that of the intergroup IGC codes, but shorter than that of the intergroup IGC codes between groups; and under the same code length, the auto-correlation performance of the novel IGC codes is better than that of the IGC codes and both codes are of similar cross-correlation performance.
Research on Next Generation Networks Resource Addressing Based on IPv6
Authors: Shen Cong Cong , Dai Chao Fan
Published: December 2012

The current Internet addressing systems no longer adapt to the addressing mechanism of next generation network. This paper designed a Port Layer which was consist of Application Platform Interface Module, Resources Information Processing Module and Subnet Access Adapter Module to realize the connection of resource and the integration network of IPv6. The Port Layer addressing mechanism encoded resource in variable length with mixed classification, extended resource coding to 64-bit as the interface ID in the IPv6 address by automatically distributing the extension prefix, which is aim to supply dynamic addressing for mobile resource. This mechanism provides the theoretic foundation for the connection of the cyber world, the physical world and the cognition world.
Security Integration of WAPI Based WLAN and 3G
Authors: Chen Dong Ya
Published: December 2012

To achieve the security inte-gration of 3G and WAPI based WLAN, a USIM based certificate distribution protocol is proposed. Two security integration schemes, i.e, loosely coupled and tightly coupled, are presented, which unify user management of 3G security architecture and WAPI, and realize WAPI based network access for 3G subscribers and identity privacy protection. The entity authentication and anonymity of the certificate distribution protocol is analyzed in CK model, and the results show that the protocol is provably secure.
The Application of 3G Technology in the Video Transmission System
Authors: Liu Zuo Xue , Dai Jian Mei , Wang Tan
Published: December 2012

As the specific demand, a wireless audio & video communication system based on 3G network and TI DM368 DaVinci platform was designed. The data acquisition, wireless transmission protocol, G.726 and H.264 AV compression and data encryption were integrated. For improving the security and anti-interferon of data transmission, VPDN technology and the ZETATCP are adopted. The system can be widely used in security monitoring, motion detection, disaster prevention and other fields.
Efficient Utilization of FPGA Using LUT-6 Architecture
Authors: Zia Razia , Rao Muzaffar , Aziz Arshad , Akhtar Pervez
Published: December 2012

Field Programmable gate array (FPGA) technology is continuously gaining market share and becoming essential part of the today’s modern embedded systems. The most common FPGA architecture consists of an array of logic blocks called Configurable Logic Block (CLB), I/O pads, and routing channels. In general, a logic block (CLB) consists of logical cells called Slices and other dedicated resources. A typical cell consists of LUTs (Look up table). In modern FPGAs, there are 6-input LUTs instead of 4-input LUTs. In this paper we present the use of 6-input LUT architecture for some Boolean functions (Mux8, Mux16, Mux32, Mux64, SOP64, OR40 and AND40).we show our results in terms of LUTs and Slices and these results are much better as compare to previously reported results that based on 4-input LUTs.
Design of the Digital System about the Fire Safety for Urban Architecture Based on Network
Authors: Jiang Zhong , Jiang Jin
Published: December 2012

At present, the automatic fire alarm systems on sale were produced by different factories, which resulted in the information not being shared mutually. Furthermore, it was difficult to connect the different fire auto-alarm systems to the same network. They couldn't communicate automatically with the city fire-fight commanding center in time. We designed interface module of automatic fire alarm controller network and interface module of data center network. By using the existing net of PSTN and internet, it could transmit the breakdown information and a fire information of the automatic fire alarm systems to the fire-fight commanding center, the long-range diagnose, the real-time monitor of a fire and the long-range control in the city fire auto-alarm system was realized.
Design and Implementation of City Internet Fire Safety Digital Monitoring System
Authors: Jiang Zhong , Jiang Jin
Published: December 2012

The automatic fire alarm systems currently in the market came from different manufacturers, but they were unable to share information each other, difficult to form the same network and exist independently, and unable to automatically communicate with city fire control command center in time. Therefore，it caused delay of the fire alarm report. As the result, we proposed the idea of combining the City Fire Safety Digital monitoring system with Internet, analyzed its composition principle. Appropriate hardware and software were designed, and successfully developed.
Automatically Transforming Legacy XML Documents Into OWL Ontology
Authors: Yang Shi Han , Wu Jin Zhao , He An Ping
Published: December 2012

It is a challenge to transform legacy XML-based data into ontology for applications of the semantic web, such as semantic-based integrations, intelligent web searching, and internet based knowledge reasoning. We propose a new technique to transform XML data into ontology data automatically by modeling XML documents semantically. Firstly, we provide the XML a semantically interpretation by developing a graph-based formal language, w-graph. Then, the result of the interpretation can be automatically mapped into OWL web ontology language with semantics preserved. The proof of semantics preserved also been considered, and automatic mapping tool has been developed.
Software Engineering Analysis and Practice of Information System
Authors: Xiang Gang , Wang Hua , Wang Hui , Zhang Guiyuan , Jiang Bo
Published: December 2012

Based upon the summary of software engineering, this paper sets forth the engineering practice content of application software of information system, and puts forward the work emphases, such as promoting the capability of software demonstration, improving the quality of software design, emphasizing the application of software reuse, enhancing the capability of software test and intensifying technical configuration management. Thenceforth a primary prospect is presented.
Key Problem of Solving Nonlinear Reynolds Equation
Authors: Wang Guo Ping , Chen Hua Ling , Qi She Miao , Yu Lie
Published: December 2012

Finite element equation of the nonlinear dimensionless Reynolds equation, based on the Galerkin finite element method, was derived. Three key points of solving the equation was studied in detail, i.e. Boolean matrix was calculated under the nonlinear conditions, and a method of integrating discrete element equations was provided; Nonlinear algebraic equations set, resulted from integrated finite element equations, was obtained and a method how to substitute boundary conditions into the algebraic equations was presented; A method of calculating the Jacobi matrix of the equations set were described in this paper. All of them are crucial to solve the nonlinear Reynolds equation and helpful for promoting the further research on compliant foil gas bearing.
Design of Software of the Universal Test Platform for Airborne Guidance Weapon Based on PAWS
Authors: Fu Xin Hua , Shen Jun , Luo Bei Guo
Published: December 2012

After introducing the research background of the universal test platform for airborne guidance weapon, the paper puts forward its hardware architecture which is built based on multi-bus fusion. The main functions of its software are described and its software architecture is proposed. To realize the transportability and inter-operation ability of TPS, its software is developed with the method of signal-oriented using the test language-ATLAS and is compiled and run on PAWS. The software of VC++、Lab Windows/CVI and so on are adopted to develop interface and instrument drive of the system. The software development process with PAWS is also introduced. Its software is expansible and when the test platform adds a new airborne guidance weapon which needs to be tested, only adaptor database Ita.ITA and TPS database need to be developed.
Software Design of Test System for Missile Flight Control System
Authors: Chen Dan Qiang , Cao Guo Hua , Fan Hui Lin , Wang Jing Hua , Qi Duo
Published: December 2012

Before final assembly and while debugging a missile, in order to ensure the flight control system can work stably and reliably, it is necessary to develop an auto test system. Test software is an important part of the test system. After describing the composition and working principle of the flight control system, summarizing the test requirements, the test software is designed. The design ideas, test algorithm, realization and key technologies, software anti-jamming techniques are introduced in detail. The test software guarantees the test system test the flight control system generally and reliably.
The Research of the Accessibility Website Design Based on Web Log Mining
Authors: Tang Heng Yao , Zhan Xiao Yan
Published: December 2012

On the problems existing in the realization of current accessibility website, we design a web designing architecture, using the web log mining technique to extract user interests and access priority sequence and adopting the dynamic web page information to fill the web page commonly used structure, realize the intelligent , personalized accessibility.
Methods for Computing the Gravitational Potential of a small Solar Body
Authors: Liang Chun Hui , Yun Zhang
Published: December 2012

This paper summarizes and classifies some common algorithms to calculate the gravitational potential around irregular non-spherical bodies after reading and collecting a given mass of literatures. Then we proceed to introduce analytical and numerical methods to compute the potential at external points for irregular bodies and special for homogeneous tri-axial ellipsoid. Analytical methods include spherical and ellipsoidal harmonics, Ivory’s approach, finite analytical formulations, numerical methods include polyhedron, mascons approach. The advantages, disadvantages and applications are compared.
Design and Implementation of a Pager Based on Facelets Technology
Authors: Lou Bu Ye , Zhao Jin
Published: December 2012

After analyzing the functional requirements, a development model of the pager component based on characteristics of Facelets composite component is proposed. In the model, an auxiliary object and a managed bean are introduced to support the rendering of the pager component and the data table component respectively. Inheritance relationships between the managed bean and the auxiliary object reflect inner relationships between the pager component and the data table component, which can improve independence of the pager component and reduce the difficulty to develop. Finally, the implementation technology and the usage of the pager component are presented. Its effectiveness, applicability and ease of use are demonstrated by practical applications.
Research on the Hereditary Properties of the Cartesian Product Operation of Graphs
Authors: Wang Hua Dong , Wang Bin , Hu Yan Zhong
Published: December 2012

This paper defined the hereditary property (or constant property) concerning graph operation, and discussed various forms of the hereditary property under the circumstance of Cartesian product graph operation. The main conclusions include: The non-planarity and Hamiltonicity of graph are hereditary concerning the Cartesian product, but planarity of graph is not, Euler characteristic and non-hamiltonicity of graph are not hereditary as well. Therefore, when we applied this principle into practice, we testified that Hamilton cycle does exist in hypercube.
Storage Model of Native XML Database Based on Object-Oriented Database
Authors: Zhang Xue Min , Nie Hua Bei
Published: December 2012

Storage for XML is a main research of Native XML database. Native XML Database has many different physical storage patterns, and their corresponding storage models are different. Based on defining the conceptions of Native XML Database, storage tactics and storage model, the paper describe the storage model based on object oriented database.
Implementation of a General Role Permission Management Method Based on Menu Items
Authors: Lou Qi Ming
Published: December 2012

The management of user permissions is one of the basic functions of a database system.Firstly,the common database system user access control methods and their characteristics are explored;Secondly,a general role permission management method based on menu items is proposed,then the design of the tables,the design and implementation of the menu item visiting class,and the design and implementation of a window using a tree-view to set role permissions were given;Finally,introduced the application of this method in database systems with an open computer-room management system.
Research and Design of Software Quality Control System Based on the CMMI System
Authors: Fang Ying Lan , Han Bing , Zhou Wei Fu
Published: December 2012

In recent years, the "software crisis" in the information industry which reflected the traditional software development methods had no longer met the current software quality assurance. In order to solve the outstanding problems, this paper continuous explores and in-depth studies CMMI system. It makes engineering idea apply to complex software development process management and quality assurance, uses new ideas and methods to achieve efficient control with multi-dimensional and multi-level heterogeneous characteristics model system for software engineering quality to ensure the correct implementation in the process throughout the organization. It provides reasonable technical support so as to achieve the improvement of software development efficiency and quality. Contrast to the popular defect management software, this system innovatively achieves multi-dimensional systematic management from requirements, design, development, defects, testing, evaluation and dissemination with a certain degree of practicality, feasibility and promotion.
Efficient Information Piggybacking Algorithm for Purging Stable Message Log
Authors: Ahn Jin Ho
Published: December 2012

In [1], we have introduced a lightweight SBML protocol to address the following two problems of the original SBML recovery algorithm; it may no longer be progressing in some transient communication error cases and all the message send operations generated after having received some unstable messages should be delayed until they are known to be stable. However, it may make the full log information of each application message recorded on its sender’s buffer as well as on the buffer of its immediate dependent. This paper presents an efficient information piggybacking algorithm to purge stable message log information from immediate dependents’ buffers with no additional control message. It only piggybacks a variable on original control messages for logging each application message.
Retrieval and Modelling of Software Evolution Process Component
Authors: Li Jing Lei
Published: December 2012

As more and more successful software systems become legacy systems,the importance and popularity of software evolution increase[1]. In order to make the mature software systems as components, so that they can be re-assembled and maintenance as automobile parts. In this context, the software evolution process component formal definition is designed based on this background. And then define the component model. Based on the questions in component retrieval, faceted classification of the Components and the theory of tree matching algorithm is discussed and analyzed. The Retrieval of Software Evolution Process Component is designed with the theory of tree matching algorithm so as to support the software evolution process modelling.
A Method of the Post-Processing of Printed Formula Extraction
Authors: Yu Shi Ying , Shang Yong , Yang Fang , Tian Xue Dong
Published: December 2012

As an important step of printed formula recognition system, formula extraction locates the formula fields on the layout images of printed documents, which influences the performance of formula recognition to a great extent. However, the errors of automatic formula extraction occur inevitably because of the complexity of formulas themselves and the layouts which the formulas situated. To solve this problem, this paper designed a post-processing method to correct the errors existing in the results of formula extraction algorithm according to relative layout knowledge. First of all, the geometrical features of various layout fields were employed to correct the extraction errors. Then, the syntax rules were used to check the boundary components of different kinds of areas in layouts to identify which field it should belong to. Finally, the formula area was adjusted according to above mentioned information.
Antiaircraft Gun Automatic Fusion Diagnosis Based on D-S Evidence Theory
Authors: Wang Zhi Song , Tang Li Wei , Yu Wen Wen , Cao Jin Hua
Published: December 2012

Antiaircraft gun automatic is irrotational machine, its motion presents characteristic of stage, so we proposed a fault diagnosis fusion model based on Dempster-Shafer (D-S) evidence theory. At first, feature parameters are extracted from test data of multi-sensor, then, we propose a revised Minkowski distance to create evidences. Finally, we fuse basic belief assignments according to Dempster combination rule, and the analysis result verifies the effectiveness and feasibility of proposed fault diagnosis method.
On Multipath Routing Algorithm of Multiple QoS Based on DSR Protocol
Authors: Wang Chun Xia , Li Tao Shen , Ge Zhi Hui
Published: December 2012

Wireless Mesh Networks are new type of multi-hop wireless network with high rate and strong reliability. Multipath routing is employed for load balancing, fault tolerance purposes in wireless mesh networks. With the more and more application need, multipath routing has gradually become an important topic to study. An algorithm of multipath routing algorithm based on dynamic source routing protocol(DSR) is proposed in this paper. This algorithm provides multiple QoS guarantee, such as bandwidth, delay and cost, achieves multipath load balancing and improves networks’ performance. The experimental results show that our algorithm achieves better QoS performance and more advantages over DSR and split multipath routing protocol(SMR).
Verifying the Correctness of GIS Service Chain Based on Pi-Calculus
Authors: Liang Juan Zhu
Published: December 2012

As an important value-added function for GIS service, GIS service chain provides the application foundation for reusing and automation composition GIS services. An important issue for realizing the value-added service is ensuring the operation results of GIS service chain meet the user needs, so it needs to verify the correctness of GIS service chain. This paper introduces the equivalence theory of Pi-calculus. A practical GIS service chain formal model is established using Pi-calculus. The validity of GIS service chain model and whether it meets the need are verified using the formal tools.
Research and Application of Tabular Processing Method of Serial Communicaiton Data in Excel
Authors: Li Xue Fen
Published: December 2012

Connected with the Serial Communications data manage needed in the industry control, based on the methods of the Serial Communications program and circular queue data sink, with the introduction to Excel interactive objects and objects’s methods, this paper studies the EXCEL tabular methods through Visual C++. Through the electronic controlled high-pressure common-rail part production quality management system, the reliability and stability of the Serial Communications data Excel tabular have been verified.
Internet-Oriented Environment for Scientific Computing Resource Sharing
Authors: Zhang Shu Fang , Han Jun , Jiang Fei
Published: December 2012

In this paper, we introduced a scientific computing environment for Internet-Oriented computing resource sharing, abbreviate ISCEs, which is a high-performance computing environment that allows users to write and evaluate parallel distributed applications for different hardware and software configurations using a web interface. We described the software architecture of ISCEs by emphasizing Application editor, Application Scheduling Components, and Application execution/runtime modules. ISCEs is efficient which is strongly supported by the time measurement scheduling polices. The system resource monitoring can also benefit a lot from the Application execution/runtime modules. The results obtained from performance analysis show that Scalability and Speedup of ISCEs was good.
A New Agglomeration Method for Isotropic Unstructured Grids
Authors: Li Zong Zhe , Wang Zheng Hua , Cao Wei , Yao Lu
Published: December 2012

A robust aspect ratio based agglomeration algorithm to generate high quality coarse grids for unstructured grid is proposed in this paper. The algorithm focuses on multigrid techniques for the numerical solution of Euler equations, which conform to cell-centered finite volume scheme, combines isotropic vertex-based agglomeration to yield large increases in convergence rates. Aspect ratio is used as fusing weight to capture the degree of cell convexity and give an indication of cell quality, agglomerating isotropic cells sharing a common vertex. Consequently, we conduct agglomeration multigrid method to solve Euler equations on 2D isotropic unstructured grid, and compare the results with MGridGen
Research on Parallel Geo-Spatial Index Replication Strategy Based on PC Cluster System and its 3D Visualization Application
Authors: Wang Yong Jie , Dou Hua Cheng , Deng Shi Jun , Cheng Liang Yong , Wang Li , Li Jian Ping , Zhou Ze Bing
Published: December 2012

In the field of spatial information, the amount of spatial data becomes more and more large, and every operation becomes more and more complicated. Now, parallel techniques gradually become valid means of resolving this kind of complicated problem. Therefore, this paper studies the spatial partitioning method of massive data and the parallel geo-spatial index replication strategy after fully considering characteristics of PC cluster based on shared-nothing structure. After studying excellent linear mapping characteristics of Hilbert spatial ordering code, this paper applies it to spatial partitioning of data, and gives a concrete algorithm. In this algorithm, the clustering performance of spatial objects is considered, and the balance of data storage on each processing unit is also done, which greatly improves the processing efficiency of parallel spatial database. Based on this, this paper builds the parallel geo-spatial index based on R-tree, and proposes the spatial index replicas update mechanism based on master replica and weak consistency suitable for the parallel environment of shared-nothing structure after deeply analyzing current synchronous mechanisms of replicas. It is a kind of update mechanism based on message with low cost, enhances the power of parallel spatial data access and using PC cluster, and improves the availability of index data. In the field of 3D visualization application, it is also efficient. Experiments prove that the spatial partitioning strategy and the parallel geo-spatial index replication mechanism presented in this paper can improve load balance of system, and enhance performance of the whole system.
Fault Diagnosis Based on Mathematical Morphology and Probabilistic Neural Network for Progressing Cavity Pump Well
Authors: Zhang Nan , Han Zheng Jun , Lu Gang , Shao Qing , Lu Yang
Published: December 2012

The problem of a scarce consideration of screw pump well pump diagram graphic information affects the diagnosis technology promotion and utilization to some extent. The method, through which the shape features in pump diagram graphic state and parameter information been directly extracted, and then a method based on Mathematical morphology is also presented. Mathematical morphology filters of open-close operator to realize graphics edge texture feature extraction. After feature digitized, using a probabilistic neural network to identify fault. The practical application shows the classification accuracy rate is above 90%.
Preliminary Experiment of CFRP Displacement Direct Measurement with Eddy Current Sensor
Authors: Jiang Lei , Zhang Xiao Zhang , Bai Yu Jie , Tang Chang Liang
Published: December 2012

Displacement and vibration can always be found during the applications of CFRP ( carbon fibe reforced polymer). So it’s quite meaningful to measure the displacement of CFRP directly. Eddy current sensor is a promising tool for this measurement. CFRP presents great heterogeneity and high anisotropy in electromagnetic properties. At the same time, it has been proved that CFRP has quite weak conductivity. All of these means great challenge to the use of eddy current sensor, as the sensitivity would be much lower compared with traditional material such as aluminum. Many experiments have been carried out on the experimental platform self-developed in laboratory. A simplified eddy current sensor with adjustable resonant circuits was designed. Two different kinds of CFRP were used as specimens. For purposes of comparison, an aluminum ingot sample was also tested. A number of experimental data and results have been achieved. It is shown that the sensitivity will be highly improved by adjusting the divider resistance and the actuation frequency.
Prediction for Network Traffic Based on Modified Elman Neural Network
Authors: Wang Xu Qi , Zhao Zong Tao , Zhang Shan Wen
Published: December 2012

A modified Elman neural network model for the network system is proposed which is nonlinear, multivariable and time-varying. The learning method based on seasonal periodicity is introduced into the model training. And the output traffic of the backbone network at a certain university is selected for the test. Experimental results show this model has better accuracy of prediction. Compared with traditional linear model, BP neural network model and normal Elman neural network model, it has higher accuracy and better adaptability. Finally, abnormal behavior of network traffic can be found on time through the test of adaptive boundary value. And it shows that the model is feasible and effective.
Recognition of Surface Roughness Based on Fractal Theory and the Microscopic Images
Authors: Guan Zhen Zhen , Ye Ming Hui , Yin Xiao Chun , Luo Xiao He
Published: December 2012

Values of surface roughness are usually unstable with conventional measurement methods because of the affection of measurement resolution and signal sampling, in order to make the measurement results reflect the practical engineering surface accurately, a new method of measuring surface roughness based on microscopic images and fractal theory is proposed. The microscopic images are acquired and pretreated, the structure function method is used to calculate the fractal dimension and fractal proportion coefficient, experiment results show that the fractal dimensions of tested samples with same making method are equal basically, while the fractal proportion coefficients are changed with different surface roughness, the two parameters can express the surface state preferably.
Fast Fractal Image Coding Method Based on RMSE and DCT Classification
Authors: Lv Xian Qiang , Yang Song , Zhang Xin , Wang Ying , Shi Yun Feng , Wei Liu
Published: December 2012

To solve the problem of long time consuming in the fractal encoding process, a fast fractal encoding algorithm based on RMSE (Root mean square error) and DCT (Discrete Cosine Transform) classification is proposed. During the encoding process, firstly, the image is divided into range blocks and domain blocks by quadtree partition according to RMSE, then, according to DCT coefficients of image block, three classes of image blocks are defined, which are smooth class, horizontal/vertical edge class, diagonal/sub-diagonal class. At last, every range block is limited to search the best matched block in the corresponding domain block class, and the fractal coding are recorded until the process is completed. When searching the best matched block, the nearest neighbor block will be found in the sense of RMSE in the ordered codebook, and the best matched block will be further found in the vicinity of the nearest neighbor block. The experimental results show that the proposed algorithm can efficiently reduce the search space and shorten the encoding time, while achieving the same reconstructed image quality as that of the full search method.
Video Splitting Based on Error-Distortion Computation Model
Authors: Peng Jin Xiang , Zhang Jian , Yang Wei Ming
Published: December 2012

Various video compressed coding standards have been established with some differences broughtby buildersfollowing the requirements on the data of voice and image, and developed continuously subject to people’s demand of people. Now, video compressed coding research divides into two main directions: one is that DCT hybrid coding scheme based on tradition; the other is the coding scheme built from the objects put forward based on the 2nd generation image coding technology. The object-based coding method can actualize both the function that enlarges image data compression ratios and the man-machine interaction, giving our projection of the future video compressed coding development direction. In this paper, the object-based coding model selection algorithm is studied, and using the concepts of video object in MPEG-4, the method of splitting video is given.
Research on the Method of Orthogonal Three-Direction Chain Code Used in Corner Detection of Hand Gesture
Authors: Li Ling Hua , Mi Shou Fang
Published: December 2012

This paper describes the research on the method of orthogonal three-direction chain code (3OT) used in corner detection of hand gesture. The research is discussed from two aspects: the main idea of 3OT and the experiments on corner detection for hand gesture images of 26 letters in American Sign Language by using 3OT. Experiment results show that the method has well performance with exact corner detection rate and least false corner’s number.
The Role of the Integrated Management of Spatial Data in Urban Management
Authors: Zhou Zhi Min
Published: December 2012

The importance of spatial data infrastructure for urban management, basic data element mesh data, component data, geocoding data statistics, the final data integration, sharing and analysis to improve access to digital data, and promote the standards of the urban management approach to enhance the urban management of spatial data analysis to provide a reference for future urban management.
A Registration Method Based on Image Edge Normalized Correlation
Authors: Bai Lian Fa , Zhang Li Qin , Jing Xin , Yue Jiang
Published: December 2012

In order to solve the infrared and visible image registration problem, a new edge matching method is proposed. Firstly, the algorithm gets edges using Canny operator, and then computes the image edge normalized correlation value (IENC) which is treated as the matching degree of registration. In order to evaluate the performance of the proposed algorithm, a comparison experiment between the proposed algorithm and the algorithm based on Hausdorff distance is done. Experimental results show that the proposed algorithm is effective, small amount of computation and good stability.
Research on Visualization of Spatial Data and Symbols Based on ArcGIS
Authors: Sun Xu Dan
Published: December 2012

To the problem of visualization expression, under the ArcGIS space environment, I use the ArcObjects components to do the symbols allocation and visualization expression for spatial data and point, line and polygon target. Result shows that it has finished the visualization effect of spatial data and symbols in the geographical information system.
A New Partitioning Method Based on AOI Model Matching in CVE Systems
Authors: Hu Xiao Mei , Wang Biao
Published: December 2012

Collaborative Virtual Environment (CVE) system supports a large number of users to explore a virtual world and interact with each other through networks, so one of the key issues in the design of scalable CVE systems is the partitioning problem. Existing partitioning algorithms in CVE systems based on multiple-server architecture, in our opinion, hardly consider the communication character of virtual environment. In this paper, we propose a new partitioning method based on area of interest (AOI) model matching to improve the quality of partitioning. The experimental results show preliminarily that our partitioning approach based on AOI model matching does decrease the traffic among the servers in the system and improve the partitioning performance.
Web3D Technology Research Based on the HTML5
Authors: Zhang Shu Dong , Yu Lei , Wang Jing
Published: December 2012

The ticket office of 3D-version Titanic has gone beyond four hundred billion within six days, which left the public not only good memories, but also peoples affections with the 3D film and the rapid development of 3D technology. The Web3D technology has also become the core of the next generation Internet. WebGL is a JavaScript API for rendering interactive 3D graphics and 2D graphics.It can be used in any compatible web browser without the use of plug-ins.So,the WebGL technology is developing quickly now.This paper primarily introduces the development of HTML and the latest standard of HTML5. It also makes comparisons with other commonly-used Web3D technology, and discussed details of WebGL technology.
In-Network Time-Series Data Compression for Electric Internet of Things
Authors: Zhao Jia Kui , Mu Lian Shun , Ouyang Hong , Zhu Ping Fei , Li Yu Kai , Yang Liang Huai , Chen Li Jun
Published: December 2012

The IoT is considered as one of the most important supporting technologies of the smart grid and the smart grid is considered as one of the most important application areas of the IoT. However, the electric IoT has vast amount and many kinds of sensors, very high data acquisition frequency, and a highly heterogeneous network, which lead to the challenge that if the raw time-series data gathered by sensors is all transmitted to the sensing data center via network and then compressed and reserved, the bandwidth and the computing resource requirements of the network and the sensing data center, respectively, are unacceptable. In this paper, in order to cope with the challenge, we propose an in-network time-series data compression algorithm, i.e., the DSDT (Distributed Swinging Door Trending) algorithm, for the electric IoT, which utilizes the computing resource of the sensors to compress the raw sensing data, and then transmits the compressed data to sensing data center where the data will be further compressed and reserved. In this way, the bandwidth and the computing resource requirements of the network and the sensing data center, respectively, are significantly reduced. A performance study shows the superiority of the algorithm.
ADS40 Test Field Calibration Using Posteriori Compensation Method
Authors: Tu Xin Ru , Xu Miao Zhong , Shen Wei , Zhu Wei Dong
Published: December 2012

ADS40 is the first commercial three line scanner(TLS) Airborne Digital Sensor developed by LH Systems jointly with DLR and launched in 2000.The unique hardware design and dataset processing workflow of ADS40 bring challenges to traditional calibration theory and methods. Considering the imagery acquirement and interior orientation methods of ADS40, the ADS40 test field calibration using posteriori compensation method is proposed: An analysis is made to the systematic error of ADS40’s cam file. A set of first order bivariate polynomial functions is developed to fit the systematic error, and the solution method is deduced. With the practical ADS40 dataset, a set of experiments is done, and the experimental results demonstrate the effectiveness and feasibility of proposed method.
Accuracy Analysis of SRTM-DEM in Qinling-Dabashan Area
Authors: Liao Shun Bao
Published: December 2012

It was concluded by comparison of 60 sites of elevation data from SRTM-DEM and field measuring in Qinling-Dabashan area that there was a close correlation between them with a correlation coefficient of r2=0.9989 and a mean error of 18.22 meters. It was demonstrated that SRTM-DEM could present undulating terrain better in the region. The errors of SRTM-DEM in the region have nothing to do with slope, degree of shelter or terrain fragmentation. They belong to accidental errors but not systematic errors.
Research of Electronic Failure Knowledge Management Mechanism Based on Simulation Acquisition
Authors: Wang Jian Ming , Huang Jing De
Published: December 2012

The establishment of electronic equipment and more operating conditions of knowledge acquisition simulation environment, considering the failure of electronic equipment failure caused by the internal laws and mechanisms, to the essence of the phenomenon of electronic failure analysis, combined with the physical prototype test results and raw statistical data, research the actual process of using electronic equipment, considering the state of properties, condition monitoring parameters and the integration of traditional knowledge, expertise and reasoning techniques to be applied to physical prototype of a certain conclusion, not only for the early prediction of potential failures, laid the theoretical foundation for forecasting , and fault prediction system for the electronic equipment, the development provides important data and technical support to solve the electronic equipment maintenance and support tasks needed problem.
Development of the Gas Flowmeter Based on Assembled Hot-Film
Authors: Huang Zhen Wei , Cheng Jia
Published: December 2012

A gas flowmeter with temperature compensation is designed based on the single assembled hot-film probe. Experiments are carried out to analyze the temperature characteristics of the hot-film probe. The performance of the automatic temperature compensation units is studied. The flowmeter is tested on the Sonic Nozzle standard flowrate system for the calibration of flowmeters. The experimental results show that the precision is up to 0.6% and the ratio of the measurement range can be 60:1.
Design and Implementation of Panoramic Video Surveillance System Based on OMAP4460
Authors: Liu Yun , Zhang Ji Ru , Gao Jian
Published: December 2012

Video surveillance technology plays an important role in the security field, with its intuitive, convenient and abundant information and is widely used in city traffic, civil security and other various fields especially in the important safety departments or major events. In this paper, according to the video surveillance system features and functional requirements, we use embedded system ,OMAP4460 and Android operating system on the basis of the panoramic technology to realize vertical 180 degrees horizontal 360-degree panoramic video surveillance. In the paper we profoundly analyze and discuss the embedded panoramic video surveillance system mainly from the hardware platform structures, the design of the peripheral circuit and the panorama function implement.
Kinematic Modeling and Analysis of Articulated Arm Coordinate Measuring Machines
Authors: Gao Guan Bin , Wang Wen , Li Hong Qiang , Zhou Jian Jun
Published: December 2012

The articulated arm coordinate measuring machine (AACMM) is a new type coordinate measuring machine (CMM) base on the linkage structure with the characteristics of small size, light weight, large measurement range and flexible movement. The kinematic modeling methods of six degree of freedom (6-DOF) AACMMs are studied in this paper. By analyzing the structural characteristics of AACMMs the kinematic model of a 6-DOF AACMM with DH method was established. From the kinematic model the coordinate systems and structural parameters of the AACMM are obtained. Then the homogeneous transformation matrixes from the probe to the base of the AACMM are derived. Finally, methods of numerical computing and graphical simulation are used in verifying the kinematic model. The kinematic model provides a basis for measurement, calibration and error compensation of the AACMM.
A High-Frequency Inverter Based on Double Closed-Loop Control
Authors: Yang Lin , Liu Gen Wang
Published: December 2012

In order to improve the dynamic performance of inverter and the output voltage waveform quality, the double-loop control combination with internal current loop and external voltage loop is introduced. The inner loop is used for improving the dynamic performance of the system and rapidly eliminating the effects of load disturbance; the outer loop is used for improving static performance of the system. In the end, MATLAB / Simulink is carried out to build the system model and prove the feasibility of the dual closed-loop control structure in this paper.
Development for the Online Calibration Equipment of Open Channel Flowmeter
Authors: Zhu Wei , Chen Wei Qi , Wang Cheng Li , Shen Wei Yong , Zhao Wei Guo
Published: December 2012

In order to solve the problem of the calibration for the open-channel flow meter; the online calibration equipment was introduced. The velocity-area method was adopted as the measurement principle. The real time velocities and liquid level of different feature points in the open-channel were measured automatically. The flow rate of the open-channel was calculated and the online calibration was done.
The Design of Multifunctional Household Electronic Medicine-Chest
Authors: Yang Feng Jian , Huo Xu Yang
Published: December 2012

The design of multifunctional household electronic medicine-chest is described in this article. It includes two parts: intelligent electronic control unit and the body of the chest. The body of chest consists of 8 drawers and an operation panel. A switch sensor is settled in each drawer to detect whether the drawer is opened and the medicine is taken out. The electronic control unit is used to set and store the information of taking medicine for four members in a family. In order to confirm the information is set correctly, the information of taking medicine can be checked by means of the function of reviewing. According to the set information, it can remind the proper member to take medicine at the set time. A section of voice and a blinking light are used to guide the member to open the corresponding drawer and take out a certain number of medicines. The Medicine-Chest has two power supply modes, an outer power supply and a rechargeable lithium-ion battery supply. A power manage circuit is used to switch between the two supplies and to recharge the battery. The designed multifunctional household electronic medicine-chest is useful for aged people.
Research of Pump Performances Intelligent Test System
Authors: Wang Jian Yu , Li Shao Zhong
Published: December 2012

In this paper, the pump performances intelligent test systems is introduced. Work principle of the test system is analyzed, and the hardware architecture and software design of the system is given. The principle of analog signal calibration and frequency test with period is discussed emphatically.finally, the mathematical model of data processing are also given.
A New Design of Distributed and Smart Automatic Weather Station
Authors: Huang Fei Long , He Yan Li , Lei Wei Yan
Published: December 2012

Aiming at development and requirement of environmental monitoring, automatic weather station (AWS) must be more powerful and reliable. With distributed data acquisition nodes, new AWS extends and adds new sensors easily. Using protective power supply to each node, new system has high performance of lightning protection, which will not let system breakdown for any node crash. Three-stage automatic self-checking for node state is included, which makes failure diagnosis efficient. Data quality checking node is created in the new design. By databases and correlation models, it provides data self-checking functions for unattended AWS. Defects of old design such as fixed hardware configuration and centralized data acquisition are overcome. Flexibility and stability of AWS are improved, and data reliability of unattended AWS is improved.
Low-Cost Sustainer with a Simple Energy Recovery Circuit Utilizing Parallel Resonance
Authors: Do H. L.
Published: December 2012

A low-cost sustainer with a simple energy recovery (ER) circuit for plasma display is proposed in this paper. The proposed ER circuit employs a bidirectional switch consisting of one switch and four diodes. In the proposed sustainer, the insulated gate bipolar transistor (IGBT) can be used as a switch. Since all power switches are turned off under zero-current switching (ZCS), the tail current problem associated with IGBT does not occur in the proposed sustainer. Theoretical analysis and performance of the proposed ER circuit were verified on an experimental prototype operating at 200 kHz switching frequency.
Exploration in Adjustment of AC Electric Bridge
Authors: Bei Cheng Xun , Wu Dan Dan , Peng Jian Xin
Published: December 2012

One method called “low-order digit decided by high-order digit” is introduced to be applied to equilibrate AC electric bridge with two adjustable parameters frequently encountered in college physics experiment. The full verification of this method is discussed intuitionally. It is indicated that one can eliminate some disturbance of noise and improve measurement precision by using this method.
Load-Adaptive Soft-Switching Energy Recovery Sustainer for Plasma Display
Authors: Do H. L.
Published: December 2012

In this paper, an energy recovery for plasma display is proposed. The proposed energy recovery sustainer provides soft-switching of main sustain switches and reduces the switching loss. Due to soft-switching characteristic, the switching losses of main switches are significantly reduced. In addition, the conduction losses in both main and auxiliary switches are effectively reduced by varying a current build-up time according to image patterns. Theoretical analysis and performance of the proposed energy recovery sustain driver were verified on an experimental prototype operating at 200 kHz switching frequency.
Design and Implementation of 30kW Three-Phase PV Grid-Connected Inverter
Authors: Tang Wu Wu , Chen Liang Liang , Yin Hong Xu , Dong Hao
Published: December 2012

This paper developed a mathematical model of three-phase PV grid-connected inverter, and studied the grid-connected current control method based on PI control in synchronous rotating reference frame. Simulation and experimental results from the prototype of 30kW three-phase PV grid-connected inverter proved the correctness and the feasibility of the control strategy, and this grid-connected inverter can operate at the unity power factor state with a nice dynamic performance, and the output current has high sinusoidal and low harmonic content as well as good symmetry.
Phase Compensation Method for Electronic Instrument Transformers
Authors: Li Zhen Kun , Zhao Jing Jing , Ji Hui , Fu Yang
Published: December 2012

A phase compensation method based on signal transfer principle of electronic transformer is presented. The causes of phase error in electronic transformer are analyzed. The phase-delay caused by Rogowski coil and time-delay in signal transferring process from high voltage side to merging unit are analyzed. A phase compensation method is proposed based on high sampling rate and linear interpolation. The simulation result verifies the effectiveness of the proposed compensation method for electronic transformers.