This paper retrospects the hardware technology in 20 century from the point of view of collateral computer, microelectron technology, built-in computer and multimedia computer technology.
This paper retrospects the software technology in 20 century from the point of view of database technology, AI, computer graphics, human-machine interface, multimedia data compression technology and software project.
Advancement of computer technology and development of application supplement each other. According to the application field where computer and communication technology exists ubiquitously, this paper just discusses the important fields such as MT, CAD, CIMS and DMKD.
Although computer is the bases of modern information technology, computer technology is impossible to develop rapidly without network. This paper ananlyzes and discusses the developing course respectively according to such fields as communication technology, network framework, network security and Internet.
The development of computer industry states that advancement of technology and requirement of application are basic factors to make computer industry develop rapidly. According to the developing course of Chinese computer industry, this paper discusses its development history, development actuality and basic experience in details from the point of view of technology and application.
A discussion on digital library information resource type and charapter, orgraine method, and retrieval and so on.
After summarying and analyzing the existing engineerings and projects on digital library home and abroad, this paper points out the tendency of digital library.
This article introduces one of the key-technologies of digital library: Database-oriented middleware and several products of it.
This paper analyzes an union catalogue profile based on Z39.50 database update extended service; the profile can ensure creators conveniently perform all creation/update processes within their own workstation/systems environment using local client software. This makes possible for the efficient maintenance of the union catalogue.
This paper discusses necessity of development of general document database system for Win32. It describes oriented object programming, definition of database and its main components. Finally, it details the retrieval function of the system.
In recent years, the state of data rich and knowledge poor has to the rapid development of data mining,and researches in many different fields have shown great interest about it. The application of data mining has also kept growing quickly including traditional expert system and the hottest internet services which need the techniques of data mining to adapt the explosion of databases.In this paper the author first introduce the basic concept and process of KDD/data mining,then the fundamental ideas and methods of data mining are summarized. many application systems are also listed, and especially some Web - based mining systems are discussed in detail.
Based on the analysis of issues related to commercialized library automation software, the author of the present paper puts forward the suggestion that the development of library automation should be enhanced in the 21st century. The author also furnishes the readers with the approaches of software selection,application and development.
This paper introduces how to use the Chinese National Patent Information Retrieval System to seek some patent information, and then show you an example.
Problems relating to the quality of Internet-based information sources are presented. A serials of issues about search engines, the main search tools on the Internet, is discussed: their categories, characters, working mechanism, advantages and disadvantages. Steps to search high quality information via search engines and other services are described as well.
The database services system of IEEE/IEE electronic library full text optical disk was introduced.On the work practicality, the system characteristic,retrieval interface, retrieval method, document output format and download format are discussed.
On the base of investigating articles about searching engine published 1995-1999 in China, the situation of years distribution, magazines distribution, subjects distribution and authors distribution of literature is analyzed. and major literature is listed. Major direction of research of Chinese searching engine is proposed.
Serving as essential data for organizing and searching Web information resources, Metadata is one of the key factors in web search techniques. This article takes metadata for Web resource discovery as research target and discusses its functions、categories and relations between Dublin Core and MARC.
Resource Description Framework (RDF) is a foundation for processing metadata. It provides interoperability between applications that exchange machine-understandable information on the Web. RDF emphasizes facilities to enable automated processing of Web resource. This article is to introduce RDF data model and syntax by a example, at the same time,the author outlines the characteristics of RDF.
With the rapid increasing of Internet information resource and E-commerce, comprehensive search engines have not been meeting users specify information needs. So, it is important to design guiding databases on Internet. This paper describes the concept, types, characteristics and basic theory of guiding databases. Finally, the design procedures are further discussed.
This paper discusses basic concepts about the EDI standard, and it’s implementation in the field of book trade, which adopts client/server mode, uses outlook express to transfer messages about book trade documents on Internet.These documents have been transferred according to the EDIFACT standard format and encrypted for safety consideration. This application system can provide services for corporations to send and receive orders and complete relevant functions.
By analyzing the status quo of the distibution of our country s documentary information resources, the author points out the new changes of the distribution of information resources and the measures which libraries should adopt in dealing with network information resources.
This paper describes the source of data、search screens、retrieval methods、result list and database administration of EBSCO-online database,and points advanced features.
Web pages and Web sites, some argue, can either be collected as elements of digital or hybrid libraries, or, as other would have it, the WWW is itself a library. We begin with the assumption that Web pages and Web sites can be collected and categorized. The paper explores the proposition that the WWW constitutes a library. We conclude that the Web is not a digital library. However, its component parts can be aggregated and included as parts of digital library collections. These, in turn, can be incorporated into“hybrid, libraries. ”These are libraries with both traditional and digital collections.Material on the Web can be organized and managed, Native documents can be collected in situ, disseminated, distributed,catalogueed, indexes, controlled, in traditional library fashion. The Web therefore is not a library, but material for library collections is selected from the Web. That said, the Web and its component parts are dynamic. Web documents undergo two kinds of change. The first type, the type addressed in this paper, is“persistence”or the existence or disappearance of Web pages and sites, or in a word the lifecycle of Web documents. “Intermittence”is a variant of persistence, and is defined as the disappearance but reappearance of Web documents. At any given time, about five percent of Web pages are intemittent,which is to say they are gone but will return, Over time a Web collection erodes. Based on a 120- week longitudinal study of a sample of Web documents, it appears that the half- life of a Web page is somewhat less than two years and the half- life of a Web site is somewhat more than two years. That is to say, an unweeded Web document collection created two years ago would contain the same number of URL s, but only half of those URLs point to content. The second type of change Web documents experience is change in Web page or Web site content. A gain based on the Web document samples, very nearly all Web pages and sites undergo some form of content with in the period of a year. Some change content very rapidly while others do so infrequently (Koehler, l999a). This paper examines how Web documents can be efficiently and effectively incorporated into library collections. This paper focuses on Web document lifecycles: persistence, attrition, and interm it tence, while the frequency of content change has been reported (Koehler, 1999a) , the degree to which those changes effect meaning and therefore the integrity of bibliographic representation is yet not fully undersatood. The dynamics of change sets Web libraries apart from the traditional library as well as many digital libraries. This paper seeks then to further our understanding of the Web page and Web site lifecycle. These patterns challenge the integrity and the usefulness of libraries with Web content. However, if these dynam ics are understood, they can be controlled for or managed.
This paper analyses some problems about management information system course s teaching in university in China, put forwards some countermeasures aumung at existing problems.
Database retrieval system is an important part of local documentary database. Whether or no the system is effective determines the equality of the database. According to the characteristics of local documents and their users this article is designed to set up “breakdown system of classification”, “breakdown system of placenames classification” and “breakdown system of writing forms classification” so that readers may make good use of the database.
With the development of network, The trend of catalogue will be toward cataloging Internet resources.