Digital library nowadays is regarded as the important mode of exploring knowledge resources in community sharing and increment utility. But the concept and system of resources construction and management and information services contradict essentially the industrialized system of modern knowledge production and
transmission. The contradiction forms the radical hindrance to the community sharing and long-term development
of knowledge resources. To solve this pivotal problem, we need to cultivate and construct the market system
according with the development rule of knowledge transmission and culture industry in the informationalized environment, simultaneously, taking the digital study platform and knowledge management platform as the main applied mode，construct normatively an Internet publishing platform leading by digital library, through which,knowledge is transmitted, shared and utilized incrementally.
This paper applies the improved information gain method to the text clustering. Retrieving 250 from the corpus, according to Vector Space Model and the information gain feature selection method,construct the text feature vector;use C-means to automatic clustering, the precision、recall and F-measure are 0.82、0.88、0.83.
As a principle component technology of supporting Internet mobile computing, mobile IP has greatly increased in popularity over the past several years. The paper analyses and discusses the core mechanisms and related processes, such as agent discovery process, registration process, datagram routing and forwarding process, of mobile IP protocol. Again a case of deployment of mobile IP in building an authentication and access contr
ol system for digital resource management is discussed, which can gracefully support mobile user to access and use legally the digital resources in a digital library.
By colligating and analysing the current development trends and characteristics in digital reference service modes and conceptions, the article introduces how to design and implement a distributed digital reference service system , which is more practicable and available and has many superior functions.
Establishing the Web Service of MARC metadata will be a very important ways of publishing MARC metadata through network. The paper introduces Web Service and explores the advantages of establishing the Web Service of MARC metadata. In addition, by means of one program example, explains how to establish the Web Service of MARC metadata.
The research importance and methods of management research of image information resources on computers are discussed in the paper. Some aspects such as organization, acquisition, expression, storage, retrieval, recognition, monitoring, sharing and so on，to which attention should be paid, are described. The proposal guidance are necessary in the course of developing an information management system of resources of image,
video, graphics, etc.. The purpose of the investigation is to make image information, their techniques and management systems more useful to the reconstruction of the socialist modernization of China.
By analyzing the study on information retrieval in China for last ten years, the mostly-researched contents and directions are summarized and assessed in this article. Therefore, the future research trends of information
retrieval can be drawn from it.
Content-based image retrieval is one of the most popular technique in image retrieval today. This paper is based on the localization of content-based image retrieval, and its primary aim is to study in the future development direction of content-based image retrieval from several aspects, such as the image data model, the valid feature
extraction, high semantic with the connection of the low layer semantic, high-dimension index, the combination feature retrieval, the image retrieval in compressed-domain etc.
Some relevant functions of fuzzy words' membership function and fuzzy language operators' membership function and storage procedures for realizing the data query are defined in SQL, those aim at the reality of fuzzy query of person information manage databases.
This article detail the localization of IPv4 and the primary characteristic of IPv6，alse process the analysis research to the DNS system construction under IPv4 and IPv6 and the demand to DNS of new characteristic of interim from IPv4 to IPv6.
CPSCI builds up a system of citation index data input and revision based on Web. Meanwhile, it formulates a number of methods and strategies leading to scientific and efficient system development, data input and revision, data security, processing articles automatically and the control of data quality as well as scientific and efficient data organization so as to ensure the speed of the construction of citation index database, its quality and the realization of the systematic function.
With advanced C++ Builder 6.0 developmental tool, popular JSP dynamic Website developmental Language, we have realized the development and design of Conference Literature database system, especially of its main functions such as MARC data management and maintenance, conference information network searching etc.
Web log mining is the most important application in Web data mining. We can improve the organization structure of Web site and its function ,increase personalized service and discover the potential reader group on the basis of the analysis and research of Web log mining documents. Data preprocessing decides the quality of Web log mining. It includes data clearing, user identifying, user session identifying, format, etc. and its aim is to separate Web server log into multi-user reference strings and also give the reference type realization.
Log analysis regard as component part of network security defending system, it plays a very important role in the network security. This paper discusses the significance of logfile introduces several analytical methods for logfile , and points out developing treads of log analysis.
In combination with practical experience, the author gives examples to introduce information retrieval method of the American BIOSIS Previews database by using OVID and Web of KnowledgeR Interface. Compare and analyse their retrieval function.
After introducing the concept of Competitive Intelligence System (CIS) in this article, the necessity and possibility of CIS construction by Shanghai SVA Group are analyzed. Furthermore, author introduce the project plan and implement process. Finally, author review the running status and relational works.
In the course of database development, we often meet the problem printing the report form, this text has been introduced while VB report form designs and develops, according to the different type of the report form, adopt the corresponding report form method in VB, has summarized the implementation method of the general report form, compared their own advantages and disadvantages; To the realization of the complicated report form, the paper put forward the feasibility of adopting Microsoft Office Web Component, and among them has analy sed the complicated report generation scheme in detail.
Referring to the Association of Research Library (ARL)'s LibQual+ project, Tsinghua University Library organize and carry out the Library Service Quality Survey Project to the campus. In this paper, we introduce some experience of design and implementing a Web-based survey system.
On developing the method of library digital resources Accessing statistic,the paper introduces the design idea and realization approach of realizing collection digital resource access statistic by ASP and IIS.
This paper introduces the SPIE digital library, and discusses the retrieval functions, retrieval methods and treatment methods of search results.
The paper introduces how to use XShot2003 system for CD-ROM retrieval.
On the basis of the number of published articles and the frequency of their being cited,twenty-nine kernel authors have been identified,Dependent on the relative coefficent r, this article analyses the relativity of the number of the published articles and the frequency of their being cited.
ASP Technology is one of the most popular developing environment in IIS programming. It's very easy to study. Almost all of the website of library use the technology to develop applications. It's just because it is very easy that a
lot of safety questions come with it. What safety troubles will be caused and how to deal with these troubles has been expounded in this article.
This paper introduces the conception of personalized information service and puts forward a personalized information service model and how to realize it.