This paper studies on two popular open source systems: DSpace and Fedora, gives a general analysis and comparison of architectures and main features of these two systems, thus to provide a reference to the researchers focusing on this area.
Metadata is one of the projects to solve the network resources from having no preface to preface. This paper introduces Dublin Core using in the digital library. Aiming at China\|US Million Book Library Project, the paper expatiates the reason that why DC 1.1 version is used as the standard of digital book metadata, introduces the method of auto check of the digital book DC using software, then analyzes the result of the check.
The rapid increase of image resources makes it necessary to develop technology for efficient image indexing and retrieval. This paper presents a database approach to indexing image, which facilitates the extraction of image features such as color, texture and shape and also the description of the inner and outer characteristics of images such as classification, subject, title and creator. Index mechanism supporting fast retrieval is built up.
The basic technologies of semantic Web and its hierarchy model are studied in this paper. The author proposes a new digital library framework based on the semantic Web, and illustrates the system infrastructure. The paper also discusses the related technologies for realizing the system. Based on the semantic Web and ontology, this model expands the traditional retrieval schema from keyword-based to semantic\|based.
The paper elaborates on the courses of development and aims of CALIS union catalog system. It expounds the system structures, its work flow, management module and operation. It also raises questions in front of the systems nowadays.
The paper introduces the principles of Radius protocol,and describes the method that identifies the VPN user using Radius server which constructed from FreeRadius software in details.
From a demonstration of the design and deployment of the application system for resources and environment subject information portal, the paper discusses a SPT-based approach to build for a Web portal, including supporting environment, functional framework, customized implementation of main functions，and etc.
In information retrieval, Algebra Theory is one of significant tools of Retrieval Modeling. The models on the basis of Algebra overcome the fault that partial matching can not be implemented within Boolean Model, then become more and more popular. This article analyses the Vector Space Model based on Algebra, and expands the model: expresses the index terms with minterm in order to reflect the relationship between terms, uses singular value decomposition to present the semantic structure of documents. At last, makes the compare between these models.
Under the continuing development of search engines, Metasearch engine is one kind of search engines that cannot be neglected. Because of it’s unique motive of design from other search engines, there are special values in its existence. This article mainly introduces the working principles, search functions, main characteristics, search results of the Metasearch engine, Dogpile, and the analysis its deficiencies. Also this article proposes some suggestions on the improvements for Dogpile.
By analyzing the factors of CAD drawing and referencing DC metadata, this article establishes the CAD drawing metadata, and provides a CAD drawing description example with RDF/XML.
The active information service is one of the trend of information retrieval service. Though the traditional vector space model has some advantages in the design of active pushing system, it can’t solve the irrelevant problem. The paper provides some improving measures, and gives a model of active pushing system based on vector space model, which can better improve the efficiency of Web information retrieval.
Analysis, indexing and retrieval of video information is one of the difficult and hot spots in Multimedia Information Retrieval. This paper analyses indexing object, content modeling, indexing structure and indexing model, and discusses on this basis some of the problems that exist in the video structuring, the organization and indexing of video documents.
This thesis analyzes the deficiency of the traditional search engine and discusses how to design intelligent search engine by means of knowledge base system（KBS）.A applied instance about CYC system is introduced in the thesis．
his paper distinguishes all-in-one-card platform from all-in-one-card application in digital campus firstly. After concluding the development of the all-in-one-card platform, it keeps to emphasis on the analysis of the familiar all-in-one-card platform. Then several solutions of interface with all-in-one-card platform are described in this paper. At the end of the paper, there gives a brief discussion about the construction model of all-in-one-card in campus.
RDF Site Summary (RSS) is lightweight，multipurpose， extensible metadata description and syndication format. Because of its features of simplicity, standardization, generalization and easy to use, more and more high-quality scientific websites choose to use RSS to publish their new information. The RSS-based Science and Technology Information Syndication System is a system aiming at syndicate the high-quality RSS information published by many scientific websites in RSS format. It can help librarians gather the latest science and technology information from websites and help them to trace, to monitor, to discover and to analyze the progress of sciences.
Considering the character of the resource management of the economic information of tropical crops, this paper emphasizes on the topic of the analysis, design and construction of tropical- crops-economic-information database system based on Internet, and puts forward a perfect project including hardware configuration and software platform. The realization of this system will help the sustaining development of the tropical crop industry.
The paper introduces the unitive criteria of all kinds of internet resources: credibility, accuracy, reasonableness, conveniency and supporting rate; and also describes the criteria of the web of business, organization, news, speciality, and personal, furthermore, through referring questions to make the criteria reifier.
This paper aimes to investigate the relationship between the ranking for Chinese universities and Web link counts, Web Impact Factors(WIF) of those university Websites. We also demonstrate whether the results from different search engines or from different days are consistent.
This paper presents the accessing guidelines while NETL is investigating the library automated systems.
With rapid enlargement of electronic resources in university libraries, the data-storage system has to be dilated in time. Establishing the twin-tower SAN scheme is an effective way to solve this problem. This research paper attempts to discuss on the issues of establishing and developing the SAN scheme.
This paper introduces the construction of electronic thesis and dissertation fulltert detabase of Sichuan University, and the technological questions of intellectual property protection is mentioned at the same time.
The article analyses the characters and advantages of RSS, and it discusses common pattern of RSS applications. Based on practices and experience, the article the key construes technology of RSS applications, such as user identification, subscription statistic, dynamic cache， etc. At last, it expatiates several aspects of RSS applications in information service of library.
This article begins with the essential principle of short message system, then discusses how to achieve mobile service by it in library. It also gives a project to construct such a simple and low cost system.
This paper present a new method about Labels for book arrangement and auto-recognition of book based on modern information technology. It can resolve the problems of book dislocation taken place by open shelf reading.
This Paper focus on the problems existing in ILAS II 2.0 Web booklist fuzzy query system , and introduces the redeveloping of the system with ASP.NET technology to implement on-line booklist fuzzy query .