Computer and Modernization

Research on Hybrid Programming Model on MutliCore Cluster System

ZHANG Jun;;WAN Jian-yi;

2009, 5(5): 1-4. doi:

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This paper proposes using multicore processor as a computing node in the SMP cluster system, and studies the MPI+OpenMP hybrid programming model which is suitable for this system. To compare the performances of hybrid programming model and the pure MPI algorithm, two different matrix multiplication algorithms on both models are designed and tested in laboratory. The results show that the hybrid programming model can provide better performance.

Research on Mechanism for Cache on WMS

LI Zhenhua;;LIU Peng;WANG Zhen;Gao Cheng-dong;XIA Lei;

2009, 5(5): 5-0. doi:

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With the development of open GIS, WMSbased services to integrate heterogeneous spatial data is becoming more and more popular. In order to improve the efficiency of the WMS service and to reduce WebGIS server load effectively, this article analyzes the traditional caching strategy and the currently popular map tile cache strategy,as well as the basic principles and the indexing mechanism of the open tool TileCache. Then, applying and developing based on TileCache, experiments show that the cache speed of WMS service improves obviously.

Construction and Analysis of Threeselfshrinking Generator

ZHANG Shanshan;MA Lingyong;LI Bingfang

2009, 5(5): 9-0. doi:

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Threeselfshrinking generator is presented, the period， linear complexity and symbol distribution of the threeselfshrinking sequence are discussed.

Method of Integrating CMS in Portal Environment Based on IPC Mechanism

YUAN Linli;;ZHANG Jianjun;

2009, 5(5): 11-0. doi:

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This paper introduces a method to integrate business system with CMS in portal environment. A business object has many related files which can be stored by CMS, when properties of files are managed by business system. The business system commits a request to manage related files to the portal system, then the portal event listener receives the request and deliveries the request to a bridge Portlet, which is called CMS Bridge Portlet, using IPC mechanism. This CMS Bridge Portlet communicates with CMS system through MBean Service registered in the application server.

Implementation of Radix2 FFT Processor Based on FPGA

ZHANG Hui;;ZHANG Ji-long;

2009, 5(5): 15-0. doi:

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In view of the current wide demands of Fast Fourier Transform application in digital signal processing field, this paper introduces the method of realizing a 8point Radix2 and DIT (Decimation in Time) FFT processor based on the analysis of FFT algorithm. Then, the design is synthesized on Xilinx xc3s1500 chip family, and simulated using Modelsim SE 6.0. Results indicates that this processor function realization is correct, and has high operating speed and precision.

Design and Implementation of Streaming Media Server Based on Darwin

XIA Min;WU Zhonghai;YANG Ya-hui;WANG Hong-qin

2009, 5(5): 19-0. doi:

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This paper, firstly, uses VTune tools to optimize its scheduling algorithm. Then, it improves the scheduling algorithm of Darwin Server, and adds a realtime monitor thread of monitor server state. The thread sends the server running state and parameters to the scheduler server, then the scheduler compares those parameters sent by all servers, and assigns the request of customers to the current minimum load server. Finally,the experimental clusters are set up to prove that the works in this paper are effective.

Research and Realization of Portable File System Based on FAT32

ENG Li;SUN Feng-dong

2009, 5(5): 23-0. doi:

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Along with the mobile phones becoming more and more intelligent, the traditional ones have changed absolutely, and much higher demands of functions have been brought forward. However, these demands all depend on greater memory capacity of mobile phones. And, the file system is the most important section of the process. This document explains the elements of the FAT32. Finally a file system based on the SD card of mobile phone is accomplished.

Research on Methools of IC Faults Diagnosis

TAO Li-fang;MA Qi;ZHU Hong-wei

2009, 5(5): 26-0. doi:

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Faults diagnosis of Integrate Circuit (IC) is composed of faults detection and location. The traditional detection, which functioned to detect whether the circuit has faults or not, can not locate, rank or find out the root reason of the faults. So further analysis is needed to identify the types of faults and modify the functional design or electronic design. As the development of IC technology, faults diagnosis which focuses on faults location is becoming critical increasingly. Some traditional methods about diagnosis and faults diagnosis technology based on circuit information are introduced . 

Research on Heterogeneous Patent Data Source Integration

CHU Zhen-hua;SUN Yong;;ZHANG Shu-kui;;FEI Wei-xing

2009, 5(5): 29-0. doi:

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This paper analyzes the common characters between semistructed and nonstructed patent data, and formulates a common Data Transform Model which is fit for patent data of China and seven other countries and two organizations. Database system and file system are combined to localize the heterogeneous patent data. It proves an effective method by experiments.

Support of WSS Platform for Software Development of SaaS Model

XU Yuan-hu;YU Ben-gong;SHEN Hao-jie

2009, 5(5): 33-0. doi:

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This paper analyzes the characteristics of multitenant， UI settings， ondemanding and expansibility of SaaS model. Combining with WSS platform technology， the support for a variety of characteristics is demonstrated from WSS platform to SaaS model of software development， and a certain extent applicable system model to SaaS model is proposed. For the various characteristics of SaaS model， some experiments are carried out and the support is validated by a smiple instance, and it gets the result： WSS platform for SaaS model can reduce the workload of the development of UI configure and ondemanding function. Then WSS platform can promote the software development of SaaS model in a certain range.

Comprehensive Study of Agentoriented Software Engineering

LIANG Zhi-rong

2009, 5(5): 36-0. doi:

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The study of Agentoriented software engineering is one of the most important issues in the field of software engineering. It acquires highly attention and concern in the field of academics and industry, and the study concerned is widely and quickly developed. The emerge and background of Agentoriented software engineering are illustrated from two aspects: the necessity of the application of Agentoriented software engineering and its technical development. This paper presents the content of Agentoriented software engineering research from the aspects of its technology, development and tools. The present situation of Agentoriented software engineering is analyzed. The prospect of its application and its challenge are discussed so as for its further study.

esign and Realization of B2C EMarket System Based on ASP.NET

ZHONG Ping;CAI Zhao-quan;LU Qing-wu

2009, 5(5): 39-0. doi:

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The paper studies the development of the B2C EMarket system based on ASP.NET of the general purpose technology,and then describes in detail the system design of the framework and functions, as well as the realization of the system. The systeme uses of the multilayer design model and component technology of ASP.NET, makes the system structure more simplified,more pack processed,and the lower cost of the system development and maintenances, and enhances system modular reusability, meanwhile favorable to the rapid development of the system.

A Message Passing Mechanism of Distributed Workflow System Based on XML and SOAP

LUO Shi-mei;;LI Zhong;;XIE Ling-ying

2009, 5(5): 43-0. doi:

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To meet the workflow system in the crossplatform, distributed computing and extendibility of the demand,based on XML and SOAP,a distributed workflow system mixedmode messaging mechanism is presented. It uses XML as system information and data exchange standards, and provides an automatic conversion mechanism between MOM information and SOAP message, binds HTTP protocol to transmit SOAP message, and finally achieves the purpose of heterogeneous distributed workflow systems communicating.

Design and Implementation of an Extensible 3D Game Script System

DAI Xi;HE Ming-yun;CHEN Lei-ting

2009, 5(5): 47-0. doi:

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This paper proposes a good design and implementation of script system. Design of this script system is not only extensible and reusable, but also has good hierarchy, understandability, encapsulation and extensibility in terms of modern software engineering thinking. Firstly, the whole design frame is introduced, then several classes are presented by UML class diagram. At last, it gives a display of this system and obtains good results.

Application of XML in Parallel Skeleton Specification

XU Chun;;WAN Jian-yi;;YAN Fei-bo

2009, 5(5): 51-0. doi:

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Based on intensive study of the idea, specification and application of parallel skeleton, this paper proposes a XMLbased method of parallel skeleton specification. This method provides a genetic processing model for all kinds of skeleton specification in skeletonbased systems, and gives great benefit on improving the universality, extensibility and portability of parallel skeleton libraries.

Research on Applications of UML in Design Patterns

ZHANG Yong-jun

2009, 5(5): 54-0. doi:

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First, the paper introduces the concept and classification of design pattern. Secondly,it introduces how UML support design pattern. Finally，it realizes design pattern application in system design by examples.

Design and Realization of Graduation Design Management System Basedon Campus Network

XI Zhen-yuan;JU Hong-jun;FAN Yu-tao

2009, 5(5): 57-0. doi:

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he graduation design is the most important phase of all the teaching process in higher education. It involves plenty of students, teachers,teaching phases and takes a long period. Therefore, the management of graduation design process is difficult and trivial and should be more scientific, managements. The campus network of NCIST has been built and the efficiency of management will be improved greatly with the enough utilization of the network resources. The paper proposes a detailed schema on design and realization of management system for graduation design (thesis) based on campus network.

Research on Production Appearance Modeling CSCD Application Technology Based on Web

CAO Hui-min;LIU Gang-tian;CUI Feng-kui

2009, 5(5): 61-0. doi:

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The communication of Web pages to Open IDEAS is realized by Java, the independent parameters of 3D model can be modified by combining Prg with Excel. By means of the math relation in Excel electronic sheet, the optimal dependent parameter of 3D model can be got through optimization. The user can use the optimal parameter directly to carry out the parameterized design without installing any software. The method proposed in this article can be used to develop the parameterized design module in the WCSCD system.

Development Modes and Development Trend of Applied GIS

MA Si-gen;;HE Ming-qin

2009, 5(5): 65-0. doi:

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Geographical Information System(GIS) can be divided into instrumental and applied GIS. The development modes of applied GIS include independence development, simplicity secondary development and integrated secondary development. Firstly, applied GIS development process is introduced. Then, three development modes of applied GIS are discussed individually, and a comparison on such different development characteristics is made. Finally, the developmental tendency of applied GIS is discussed.

Research and Design of PDAbased MIS System Component

CAO Hui

2009, 5(5): 69-0. doi:

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After analyzing component of soterware, this paper introduces a method of development which can be used for the PDAbased MIS system in a small domain by component.

Analysis of Open Source Workflow System——Enhydra Shark

CHEN Xian

2009, 5(5): 73-0. doi:

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Enhydra Shark is an open source software system which is based on Java platform and developed by Lutris Corporation. It completely complies with WfMC standards. Enhydra contains a visible modeling tool, a workflow execution service as well as a set of client application interfaces. Because the Shark’s source code is open, it can be refered its internal construction and be realized to practical application. There for, it’s very useful to analyze its structure and work process in detail, which is the main object of this paper.

Research on Computer Simulation of City’s Fire Engine Optimization Based on VB

LI Xiao-qin

2009, 5(5): 78-0. doi:

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Based on VB language, this paper designs and develops the Monte Carlo simulation model, for simulating randomly the number of fire incidents occurred at same time every day. Taking the target of fire trucks equipped with the minimum economic cost, it provides the simulation scheme of the best equipment to fire trucks carrying out at fire incidents occured at different probability, and provides the basis of scientific and technical support for the city fire engines equipment investment and management.

Design of Online Teaching System Based on SOA

JI Jia-qi;LIU Hong-zhuan;XU Su;CHEN Si

2009, 5(5): 81-0. doi:

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This article elaborates the SOA concept, technology and its implementation. The online exam system is analyzed and designed based on SOA. Finally, it gives this system’s frame structure, functional module and realization.

Application of Workflow in House Property Registration

LU Jian-xin

2009, 5(5): 84-0. doi:

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This paper applies the theory of workflow management system and project management to the practice of house property registration. It fulfills a set of management information system of house property registration based on theory of workflow management system, solves the problem of multiformity and uncertainty in the process of house property registration. 

Design of Individual Dose Instrument Based on Zigbee

GONG Di-chen;HUANG Qiu;MA Xiong-nan;DING Wei-cheng

2009, 5(5): 87-0. doi:

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This paper introduces the design of individual dose instrument which measures nuclear radiation. ZigBee is used in data transmission between the instrument and upper computer. Centralized management of dose instrument is achieved based on ZigBee. CC2430 is the center of this radiation dose monitor system.

Application of Support Vector Machine in Prediction of Supermarket Customer Flow

ZENG Zhao-bo;SHENG Li-kun

2009, 5(5): 90-0. doi:

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Support Vector Machine (SVM) is a new technique of data mining, its accuracy is high owing to their ability to model complex nonlinear decision boundaries. This paper analyzes the principle and algorithm of SVM,then the predictive model of customer flow based on SVM is given, At last the results of experimentation prove the validity of SVM in prediction.

UML Modeling and Realization of Campus Synthesis Website

XIN Dong-jun;ZHAO Song;ZHANG Tian-rui

2009, 5(5): 93-0. doi:

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China education is moving towards the studentcentered teaching approach. Adopting the studentcentered teaching approach should strengthen the teacherstudent emotion interaction in process of teaching and learning. Based on this, the campus synthesis website is built. The website owns the forum, the weblog, the electronic commerce, the personnel market and so on.
This article brings objectoriented modeling language UML into the design and the realization process of the campus synthesis website. The tool of Rational Rose 2003 is applied to construct function requirement model, static state model, and dynamic model. At last, the programming realizes the above model.

Research on Intrusion Detection and Security Policy for Distributed Environments

SHU Dan

2009, 5(5): 96-0. doi:

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This paper presents a novel intrusion detection approach and infrastructure to enforce the security within a distributed system. The solution guaranties the consistency of the security policy and prevents any accidental or malicious update efficiently. Two levels of intrusion detection are proposed to guaranty the integrity and the consistency of the distributed policy. The solution is more robust in terms of faulttolerance and resists to denial of service attacks. This approach enforces the security of large scale systems.

Research on Node Operating System Basedon Active Network

WANG Shan;NI Jin;TANG Wan

2009, 5(5): 99-0. doi:

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riefly the paper analyzes the features of major NodeOS instances currently, aims at Moab implementation which is compliant with DARPA active network programs NodeOS specification and takes advantages of the flexibility of the specification, highlights several crucial techniques especially for memory management and packet buffers mechanism which provide finegrained resource control for execution environment, in addition, uses Click channels to extend the NodeOS channel API, realizing flexible and efficient active route configuration perfectly.

Design and Implementation of Firewall Based on Web Remote Management

ZHOU Ming-jun

2009, 5(5): 103-0. doi:

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This article takes the basic research on the ways to build the firewall through the Web pages in order to make this operation easily, introduces the Iptables tools of Netfilter firewall, and it introduces the design and implementation of firewall based on Web.

Application of ASP.NET 2.0 Single Signon Technology to Digital Campus

YUE Xiao-ting

2009, 5(5): 106-0. doi:

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After analyzing several typical cases of Single Signon in digital campus, the paper elaborates forms authentication based on ASP.NET 2.0, realizes Single SignOn with several examples in digital campus.

Research on Distributed Virtual Cluster Render System

ZHANG Li-min;TANG Ming

2009, 5(5): 110-0. doi:

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Aimed at the rendering bottleneck and the problems of distributed rendering resource search in 3D cartoon, a distributed virtual cluster rendering system on a basis of dualtier architecture is proposed and the functional models are introduced in detail. How to compute the virtual cluster rendering is defined through the uniform description of rendering resource. The search algorithms on distributed rendering resource are proposed and the validity of the algorithms is checked.

pplication Research on Data Mining Technique on Intrusion Detection System

CHEN Si;XU Su;JI Jia-qi

2009, 5(5): 114-0. doi:

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This paper firstly analyzes and researches the intrusion detection system, then brings up the necessity of introducing data mining technique to intrusion detection system, and deeply researches application of data mining technique on misuse detection and anomaly detection of intrusion detection system.

Design Scheme of Networked Virtual Laboratory Based on LabVIEW

JIANG Bo

2009, 5(5): 117-0. doi:

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Considering the large investment, slow renewal and difficult maintenance of equipment in the traditional laboratory of electrician and electron, a design scheme of the networked virtual laboratory based on LabVIEW is presented. The new laboratory with this design scheme has many advantages, such as short developing period, low investment, and easy functional expansion, which can enhance utilization efficiency of the equipments and teaching quality greatly. Therefore, the design scheme based on LabVIEW is a new thought on the teaching reform of electrical and electronic experiment.

Implementation of Dualchannel Data Communication in Scheduling System

ZENG Xiao-ning

2009, 5(5): 120-0. doi:

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cheduling console is the core of scheduling system. Implementation of dualchannel data communication between scheduling console and switch can ensure uninterrupted scheduling operations, and improve the system’s stability and reliability.

Research on SOAPbased Web Services Security

PAN Shan;ZHENG Qiang;PAN Lu-ping;GAN Na

2009, 5(5): 123-0. doi:

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Aiming at security problems in the application of Web Services, this paper researches on the present situation of Web Services security. The key to solve security of the Web Services is security of the SOAP protocol. The features of SSL protocol and SOAP security extentions based on XMLsecurityspecification are analyzed.Then an example is given to illustrate a promotionmethody for security problems. This method has actual value in application with respect to the security of Web Services.

Security Management in IPbased Urban Network

XU Lin-feng;ZENG Ju-gen;LI She-hong

2009, 5(5): 126-0. doi:

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With highspeed development and widespread of the network construction, network security issues become more and more concerned. For the network development department, the further construction and the development of the business requires higher security for the network connection. This paper analyzes the architecture of the IPbased urban network, and analyzes the possibility of the security issues in each layer of the architecture. Finally combined with the IPbased urban network of a broadcast television,the paper proposes the technique and advices on the security management of IPbased urban networks.

Rotationinvariant Denoising Algorithm for Cyclic and Dihedral Symmetry Images

ZOU Yu-ru;LU Jian

2009, 5(5): 130-0. doi:

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A rotationinvariant denoising algorithm is proposed for restoring noisy images with cyclicr and dihedral symmetries. Based on the rotationinvariant (or plus reflection invariant) characteristic of cyclic (or dihedral) images, the proposed algorithm is performed successfully by rotating (or plus reflecting) and summing the noisy images. Experimental results show that, compared with other classic denoising methods, the proposed algorithm can restore the symmetric images efficiently.

]A Fast Peer Group Filtering Algorithm for Noise Removal in Color Image

HOU Yan-li;YANG Guo-sheng

2009, 5(5): 133-0. doi:

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A fast and efficient algorithm for noise removal in color image based on Peer Group Filter (PGF) is proposed . Firstly, the basic Peer Group Filter is introduced. And then, on the analysis of the basic Peer Group Filter, a simplified algorithm based on PGF is given to filter image. At last, the simulation is performed on the presented algorithm and the results show that the algorithm not only smoothes image and maintains edges but also reduces the computational complexity.

Modeling and Realtime Rendering of Implementation of Large Area 3DTerrain

LI Jing-rong;SHI Xiao-hong;HUA Zu-yao;WANG Zai-she

2009, 5(5): 136-140. doi:

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The modeling and realtime rendering technology of large area terrain is one of the difficulties for visual system of military simulation. The key technologies are studied including level of detail(LOD), texture mapping, paging strategy, large area database management. Then a solution is proposed that utilizes the above technologies, and generates the large area terrain by the terrain modeling module of Creator and renders the terrain using Vega. The experiment result shows perfect visual effect in the realtime environment.

Optimization Algorithm for MPEG-4 Video Compression Coding

CHENG Qi-yue

2009, 5(5): 140-142. doi:

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Based on the research background of mobile communication, with roundly understanding the MPEG4 standard, the paper introduces three algorithms to optimize the DCT and motion estimation respectivly. In DCT module, it adopts binDCT and partial coefficients DCT to decrease complexity. At the same time, Normalized Partial Distortion Search (NPDS) is used to reduce computations of motion estimation. Via theory analysis and simulation result, these three algorithms not only ensure the images quality, but also reduce the encoding time. 

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