Showing papers in "Information Technology in 2009"

Unsupervised optimal fuzzy clustering algorithm based on fuzzy c-means

Abstract: The unsupervised optimal fuzzy clustering algorithm based on the fuzzy c-means algorithm gathered the advantages of the fuzzy c-means algorithm and the unsupervised optimal clustering algorithmBy changing the number of the clustering c gradually,basing on some measures of the effectiveness,the optimal clustering can be found out without supervisingBy improving the measurement of the distance,the clustering can not be influenced by the shape of the class,in order to achieve a higher rate of correct clustering resultsThe simulation result showed that the new algorithm can not only find out the number of the clustering,but also has a better clustering effect compared to the fuzzy c-means algorithm

Benchmarking and Performance Modeling of Event-Based Systems

Abstract: Abstract Event-based systems are used increasingly often to build loosely-coupled distributed applications. With their growing popularity and gradual adoption in mission critical areas, the need for novel techniques for benchmarking and performance modeling of event-based systems is increasing. In this article, we provide an overview of the state-of-the-art in this area considering both centralized systems based on message-oriented middleware as well as large-scale distributed publish/subscribe systems. We consider a number of specific techniques for benchmarking and performance modeling, discuss their advantages and disadvantages, and provide references for further information. The techniques we review help to ensure that systems are designed and sized to meet their quality-of-service requirements.

Pervasive University - A Technical Perspective (Die Pervasive University aus technischer Perspektive).

Abstract: Abstract The article proposes a definition for the term “Pervasive University”. It discusses the idea, history, and implications of this architecture. Furthermore, some technical prerequisites from a technical point of view are stated: Pervasive Computing itself as well as Service-Oriented Architecture, Self Organization, and Peer-to-Peer Computing. This leads to a roadmap for the implementation of a Pervasive University.

Performance analysis of sleep mode operation in IEEE802.16e

Abstract: The IEEE80216e is a standard of emerging broadband wireless access system which supports the mobilityThe mobile subscribers(MSS) are mainly powered by the batteries,so the sleep mode mechanism becomes an important component for the MSS which can effectively manage the limited energy,and prolong the using time of the once-charged batteriesThis paper introduced the standardized sleep mode in IEEE80216e,then it analyzed the average energy consumption and the average packet delay under sleep mode by building a semi-Markov chain,and gave the simulation results by NS2 at last

Scalable push file delivery with MBMS

Abstract: MBMS push services give operators the ability to deliver multimedia content,simultaneously,to all users in a specific location,without overloading a mobile network.Push services are popular on the Internet and in mobile environments.Internet push services often use broadcast mechanisms,while mobile push services use SMS and WAP-push.Technical realizations today are based on dedicated point-to-point delivery.This article presents MBMS push file services as a scalability extension to unicast services.MBMS is thus used as a capacity booster for distributing popular content services.

Design of remote meter reading system

Abstract: This article introduced the remote meter reading system's composition,function and software and the hardware designs in detailIt carries on processing simulated signals come from industry probe head,service water,electricity or gas meters,and realizes the data remote meter reading and centralized managementThe system hardware mainly composed of front end data acquisition transformation circuit,the RS485 cascaded communication circuit,the LED display circuit,the keyboard and so on The system software programming uses C language,mainly composed of front end data acquisition control module,LED and keyboard control modules,host computer data communication module and so on

Image denoising algorithm based on Contourlet transform

Abstract: Image denoising is a very important technology in the digital image processing field.The traditional denoising algorithms based on wavelet transform cannot obtain an enough ideal denoising result.In order to overcome this problem,an image denoising algorithm based on Contourlet transform is presented.The experimental results show that,compared with the traditional and the usual denoising methods,the proposed method can not only keep the marginal information of the images,but increase the SNR of the denoised images.

Research on location of node for wireless sensor networks

Abstract: Wireless Sensor Networks(WSN) has important value of research and use in many fields.Self-localization of WSN has been the basis of most of uses in WSN.Node localization has been an important and critical research direction in the study of WSN.The research of this paper is based on the analysis of a great deal of recent technical reports and research results on WSN.It includes the research background,practical utility and present investigatory headway of WSN.Some related techniques of WSN,the concept and basic principles of node localization in WSN are also introduced.The research status and some main performance evaluating criterions of self-localization in WSN are analyzed.Then,some issues which need to be resolved in future are discussed.

An energy-efficient routing protocol for wireless body area networks

Abstract: The energy-efficient routing protocol EE-DSR is proposed for wireless body area networks in this paper.The EE-DSR is based on the classic DSR.It takes the special application of channel quality change,the class of the node and node working time into consideration.So it can save the energy and expend the lifetime of the networks.

State of the art and difficulties in Chinese word segmentation technology

Abstract: Chinese word segmentation is a basic research issue on Chinese information processing tasks.And Chinese word segmentation is a very important component in many field of Chinese information process.The paper proposes an unsupervised training method for acquiring probability models that accurately segment Chinese character sequences into words.Then it presents a detailed analysis of the two great dificulties in word segmentation.And finally,it points out the research problems to be resolved on Chinese word segmentation.

Algorithm research of auto white balance in hardware-based ISP

Abstract: This paper introduced the principle of auto white balance(AWB) and several common AWB algorithms,GW,PR,QCGP,SDWGW,LWGW,SDLWGW and QCLWGP.The concrete steps are given while the advantages and disadvantages are analyzed. According to the objective,subjective evaluation of simulation results and implementation complexity,a comparison on stability and adaptability of all algorithms is also presented.In the end,the comparatively good algorithms are selected and some improved methods are put forward.

Job shop scheduling problem based on particle swarm optimization

Abstract: Considering the conventional algorithms' low efficiency of searching for optimizing in job shop scheduling problems,the job shop scheduling solution is presented based on particle swarm optimization algorithm.In this paper,the basic theory of particle swarm optimization is described,also,the coding and selection of parameters as well as the decoding of PSO are studied.It uses the maximum flow time which being minimized to evaluate performance of the algorithm,and applies it to solve a typical scheduling problem.The simulation results show that PSO applied in solving job-shop scheduling is very effective.

Design of Chinese word segmentation dictionary based on traditional dictionary

Abstract: Chinese word segmentation dictionary is the important base of Chinese information processing system.The arithmetic of the dictionary influences the speed and efficiency of segmentation.This paper designs a new Chinese word segmentation dictionary based on the improved traditional binary-seek-by-word dictionary.The dictionary uses less memory.The experiment shows that the dictionary has high efficiency and is easy to build.

A Chinese word segmentation system design based on forward-backward maximum matching algorithm

Abstract: Chinese word auto-segmentation is the basic subject in the processing of Chinese information,which has become the key technology in Chinese information processing.According to the study on several kinds of segmentation algorithms,this paper introduces a maximum matching system based on forward-backward combination,and achieves the screen segmentation and document segmentation.Compared with the single segmentation in the past,the system can tell the different results of segmentation and improve the accuracy of segmentation.

ADE7758 and the application in three-phase digital power meter

Abstract: This paper introduces a multi-purpose high-precision three-phase electrical energy measurement IC ADE7758.The pin configuration and function are described in detail.The three-phase digital power meter circuit design is given with ADE7758 and MC68HC908LJ12,the designs of analog input circuitry of ADE7758 and interface circuit between the ADE7758 and MCU are highlighted.The digital power meter using ADE7758 has the characteristics of simple structure,high precision,meter reading and diversification of communication way.

Application of FTA in the risk analysis of C3 train control system

Abstract: C3 as a new generation of train control system is a safety-related system of high-speed railwayAs a result of its own particularity,the higher security is demanded,the development of safety assessment system is needed to ensure itRisk analysis is an important part of safety assessment,the related research based on risk is carried out mainly using fault tree analysisThe conceptual fault tree of C3 is built and FTA is taken on TSR subsystem as an exampleThus the following research on the safety capacity of the whole C3 system is supported

It서비스 기업의 연구개발 투자규모와 재무성과와의 관계 분석

Abstract: Due to economic turbulence and fierce competition in the IT service industry, companies have been seeking breakthrough offerings by investing in...

Ein XML-basiertes Datenbanksystem für digitale Wörterbücher - Ein Werkstattbericht aus dem Institut für Deutsche Sprache (An XML-Based Database System for Online Dictionaries - A Report on Lexicographic Work at the Institute for German Language).

Abstract: Zusammenfassung Das Online-Wortschatz-Informationssystem Deutsch (OWID) ist ein digitales Wörterbuchportal des Instituts für Deutsche Sprache. Alle darin zusammengeführten lexikografischen Daten sind auf XML-Basis feingranular strukturiert. Speicherung, Verwaltung und Retrieval dieser Daten übernimmt das Oracle-basierte Electronic Dictionary Administration System (EDAS). Der vorliegende Beitrag erläutert die XML-basierte Modellierung der Daten, XML-spezifische Fragen der Speicherung, sowie das Retrieval mit XPath und SQL/XML.

Face detection using PCA and skin-tone extraction

Abstract: Face detection plays a huge role in many applications such as security,surveillance and human-computer interface.This paper presents a new face detection method for the drowsy driver assistant system.The algorithm is based on a combination of two different principles of detection,namely detection of skin color and modified PCA.The algorithm has shown improved performance compared to that using either of the principles alone and is performing well under different lighting conditions.

제품과 서비스 통합을 위한 사례분석과 전략대응방안

Abstract: Manufacturers have recently faced such problems like limitation of product differentiation, product commoditization and increased service request...

Optimizing initial cluster center of K-means algorithm

Abstract: This article embarks from the traditional K-means algorithm to the initial center's sensitive analysis,proposes one kind of optimized initial cluster center algorithm. This algorithm unifies one kind of the improved genetic algorithm and the hub mathematical model carries on the optimization to the initial center,the effective solution algorithm to the initial cluster center's sensitivity and obtains the good experimental result.

Study on bus scheduling based on particle swarm optimization

Abstract: Focusing on the optimization of bus scheduling,this paper establishes an optimization model that aims to minimize both public transportation company's total costs and passenger's average waiting time.The bus scheduling was optimized by modified particle swarm optimization algorithm and the algorithm was validated by the real scheduling data.The result shows that this algorithm could not only benefit to the public transportation company but also the passengers and it is applicable and effective.

Analysis and application of the GPU parallel computing technology

Abstract: This paper analyzed the feasibility the GPU parallel computing technology used for general-purpose computing,briefly introduced the CUDA programming architecture.Performance of GPU parallel computing was verified by an application example.The test showed the excellent performance of general-purpose computing sped up by GPU.Finally,it summed up the implemental model of the GPU parallel computing technology.

Design of IP core in configurable TFT-LCD controller

Abstract: This paper designs and implements an Avalon bus-based TFT-LCD controller IP core,its display resolution and pixel depth can be configured.This paper uses the mind of top-down to design IP core's level function,and uses Verilog HDL to achieve all the functions of the controller and its peripheral logic timing.This paper simulated and verified this IP core,jointed it to the Nios-Ⅱ system.The test results proved that this IP core is very well.

Design and verification of energy detection in wireless body area networks

Abstract: The amplitude response characteristics of body channel in wireless body area networks versus body channel length and signal frequencies are analyzed in this paper.Then the energy detection formula based on the above body channel also are derived to formulate the energy detection algorithm in body area networks.In the end,this paper comes to the following conclusion: the detection possibility based on the derived energy detection algorithm versus channel length and signal frequencies is given in the condition of long enough detection time while signal energy changes from-128dBm to-110dBm.

Service De나dml 서비스 품질이 조직의 업무 효율성 증대에 미치는 영향에 관한 연구

Abstract: This study is to guide to estimate service quality on ITSM operation based on ITIL(IT Infrastructure Library) ITIL v2 and v3 provide how to integrate framework of IT service and business process. It is widely used as ITSM operation base. As a latest IT trend, ITSM covers Hardware, Software, SaaS, Network, Call center Helpdesk, ASP portal and IT operation. Servicedesk is selected as target area where valid sampling is addressable and service change is rapid. Traditional Helpdesk was focusing on technical support to solve internal IT issues passively. But it was evolved into Service Desk which focus in process and provide integrated service from customer's business view point preventively and proactively. Accordingly outsourcing types business are normally performed by group of professional capability. Service quality is measured under the SLA(Service Level Agreement). This study utilized SERVQUAL model as service quality measuring tool developed by Parasuraman, Zeitaml and Berry to find critical factors to satisfy customer. And test was processed regarding effectiveness of IT organization and customer view point thru sampling. Though valid parameters can be changed by ITSM area under the SERVQUAL models, they naturally can be accepted as a index of service quality measurement after sampling test with acceptable significance. And I recommend to follow this study as a preparation before official SLA

Design of multimedia distance education system based on SIP

Abstract: According to the model of tightly coupled SIP conference system with modification and supplement,this paper brings forward a detailed scheme of SIP-based multimedia distance education system using SIP stack technology

Forecast of US dollar/RMB exchange rate based on RBF neural network

Abstract: A forecast model of US dollar/RMB exchange rate based on RBF neural network is presented.The historical data of US dollar/RMB exchange rate near two years is analyzed by the model,the model is developed by combining the k-clustering algorithms to search for the network centers,and the network weight is adjusted by OLS(orthogonal least square) algorithms.The prediction result of US dollar/RMB exchange rate shows that the model has a good forecast and pan-ability and can obtain a good forecasting result.

Study of technology for parsing XML document

Abstract: With the development of network technology,the XML age is comingBecause the XML document is just a text file,if the information in the XML document is to be adequately used,XML document has need consequently to be parsedThis paper firstly introduces the DOM(Document Object Model) parsing and the SAX(Simple API for XML) parsing,then introduces that how to pasrse the XML document by Libxml2