Based on a brief introduction to the overall framework and its technical structure, the paper describes the requirements and systems of rights description languages, rights protection techniques, and rights management mechanisms.
The construction of technological frame in digital library is introduced here, and discusses technological problem also.
It is seven years since the concept of digital library was put forward in 1993. During this time, many countries have done a lot of research and explorations about the construction of digital library which has greatly promoted the resource sharing among the whole world. In order to meet the new research tendency, this paper starts with the relationship between database technology and digital library, and discusses how to apply database technology in digital library to organize the information resouces.
There has been a great progress in research of digital libraries in Russia recent years. This paper introduces several steps of the research from "concept"to "fulfillment",that is to say, from development of digital information resources, research and selection of digital technology to the fulfillment.
This paper explains necessity of treasuring library information security, and in point of solving security of library information only if database ciphering. and giving realizable technology for library database ciphering.
In this essay, the author dirsscuses about the evaluation on college libraries automation in following four aspects: 1.The role that the evaluation play; 2.Evaluation indicesdesigning; 3.Developing Periodsdefinition; 4.Evaluation on the effect of automation.
This paper starts with the problem of Web information inquire,indroduces the producing and development of DC metadata, analyzes the contents and characteristics of DC metadata, discusses the effect about DC metadata and library Web information issue,give the examples of the DC metadata descriptions approach based on HTML/XML.
This text introduces NAT( Network Address Translation ) conception of technology, use and dispose the method , and done the instance to introduce with Linux s ipfwadm.
Operation principles and technology standards for CORBA distributed objects were introduced. Standards for CORBA were applied in library automatic system, which made automatic system of library able to distributively operate. This not only settled the integration problems in the traditional automatic system of library but also met with the requirement of dynamic change of library operation. The safety, transportability, dependability and expansiveness of the system were also enhanced.
RDF is a framework which can use multiple metadata to describe the net resource. RDF will be applied into wide areas such as: search engine content description and DL et. al.. This article is to introduce the target and function of RDF and the three element of RDF: RDF data moedl?RDF schema and RDF syntax.
This article is based on the analysis of CD-ROM database s features,and introduces a physical storage technology of non-structural database. The successful applications of the technology on several databases have proved that the technology is feasible and effective.
For the fine retrieval function of the database system, the facet classification, post controlled retrieval and hyper chaining search are used. Because the class name is also a subject word in the facet classification system, the search is convenient no matter by class or subject word. Meanwhile, there is a net relation among the subject (class) in the facet classification system, the hyper chaining retrieval can be used, so the wider or more specialized search is easy along the chain. For another, there is a line word table in the database,the realization of post-controlled retrieval is easy, therefore, the retrieval effects is guaranteed while the automatic indexing and nature language retrieval are used.
In information retrieval, vector space model is one of significant mathematics tools. Because of the speciality of natural language retrieval (NLR) and the affection of synonym and polysemy in tradition information retrieval model, the precision of retrieval is not high. In order to imporve the precision of NLR, the authors discuss information retrieval model based on concept--Latent Semantic Indexing (LSI), and analysis two examples of LSI.
Two Web search tools, namely, AltaVista and Sohu, were evaluated and compared in terms of their composition of Web indexes, search capability, retrieval performance, output option, and user effort. Recall is deliberately omitted from this study because for a particular query it is impossible to assume how many relevant items there are in the huge and ever changing Web system. In addition, the author introduces two new parameters, e.g. duplicate links and dead links, for the evaluation. As a result, the autho ranalyses the gap between Chinese and English Web search tools and indicates the different evaluation methodologies between them.
Recommend the IPN s summary of patent information, using skill and how to search.
This paper discusses the process how to realize the information retrieval of Milins database with ASP in detail and cites the original codes of information retrieval system. Explanation of not only principles and but of instance can be found in the paper, so that the readers can get much benefit to study ASP and to carry out database Web development with ASP.
With the development of global compititions and social networks, more and more coutries ,enterprises and information agencies are paying much attention to CI(Compititive Intelligence),which focuses on the compititive enviroments,compititive opponents and compititive strategies,as well as accompanying with the main goal of increasing the compititive forces of these countries,enterprises and information agencies. Compititive Intelligence Webs are the results of combining CI ideas with networks, which are showing their important roles now. According to the role’s difference, the authors devide these Webs into three kinds : the research Webs on CI, the service Webs on CI and the training Webs on CI.
Traditional information obtaining method-Pull has its limitation. This paper introduces Push technology briefly. Based on the comparison between Push and Pull, the article point out the necessity of applying Push to network information services. Existing problems and developing tendencies of Push technology are analyzed. Its importance in digital library of science and technology is also discussed.
This article briefly discusses the design thinking of upgrading and rebuilding library network and centres on the aim and principle of design, the choice of network technology, the selection of main switchboard,the type of server,the design of network structure and so on.
This paper introduces the structures and functions of a Enterprise Competitive Intelligence Management System ( ECIMS ) and its sub-systems, including concept, characteristics, development in enterprises and competitive intelligence resource also.
文章对中国知识产权网、中国专利信息检索系统、北京市经济信息网、CNKI 中国专利数据库和中国专利信息网等五种网上专利数据库进行了调研, 从收录范围、记录字段和检索途径三方面进行了比较研究, 并作出综合评价。
The integration of FirstSearch with the OCLC Electronic Collections Online service means more powerful function of OCLC s electronic journals online service.This paper will introduce some aspects of OCLC Electronic Collectrions Online service about it s characters,accessing,searching and viewing,management,cost controlling,subscribing and user supports.
This article consists of four parts: the characteristcs of web sites ,the stories of web sites in China, types of stock web sites in China, and the future development trends of stock web sites in China.
From the perspective of libraries,the development of information resource contains two steps.The first is the utilization of information data ,which is comprehensive.The second is reprocessing of the information resource.This article introduces the specific practice of the development of information resource in the network environment.
The shared processing serve project of Scholar Digital Library resource has custom 180,000 chosen books, based on 50,000 books embodied and embodying in 2000 to 2001, from 1980 to 1999, and ensure the integrality and practicability of Scholar Digital Library resource.
This paper fully proves that library network system is the basement to set up digital library. It analyses the functions which the library network should have and the principles which it should be followed in process of building, illustrates how solve problems of network manager and network security with examples.
This research paper presents several solutions to the problems of the integration between gigabit ethernet and ATM during establishing networks.
This article evaluates the value of search engine about searching medical information resource.Combined with literatures,it also expoundes the category and characteristics of search engine in information resource at Internet,by which summarized the mathods,skills and defects in searching the informations separately.
The library courses is an important part of academic library user training. This article introduces the features, producing process and effects of the coursewere made with PowerPoint.
According to definition and features of digital library, this paper researches development tendency and measures of information service.