The first Internet connection in China has been installed in scientific and technological community of China. This paper describes the history, the current status, and the future of the most efficient and productive academic network in China, the China Scientific and Technological Network(CSTNet).
This paper explains the importance and necessity of setting up network user friendly interfaces of scientific databases on the Internet and puts forward the realistic goal,the system structure and the methods to realize it. Through the interfaces, the scientific database resources are well connected to the Internet, and the users can gain access to and dynamiclly acknowledge them as soon as the resources are sent to the Internet without any additional software.
The effect of Java, a new generation programming language, on the field of future library and information management is discussed. Through an example, the method of converting some pracitical statistic functions into an applet of a Web Homepage with the Java programming language is illustrated.
Efforts of TREC on the performance evaluation for IRS and its roles in promoting the development of new information retrieval technology are described, with a summary of facets and new features to show a variety of new types of IRSs. Graphs are cited to compare performance evaluation criterions for a number of commercially available full text IRSs. A framework of performance evaluation is suggested for Chinese full text information retrieval systems based on selected criterions peculiar to Chinese information processing environment.
The neural network is a main branch of artificial intelligence application in text retrieval. The advantages of its main characters that can improve the effectiveness of text retrieval are analyzed. From the view of the adaptability to people s thinking convention,the prospect of the combination of the neural network and hypertext is discussed in this paper.
A successful information system is based on a good system platform.The three parts of a system platform hardware,kernel software and application software,have been analyzed in detail in this paper.The standards of network systems,database management systems,programming languages and development tools have been suggested.
The OCLC FirstSearch online retrieval system via Internet Web serves end users with various formats including bibliography,abstracts and full texts.Its searching costs are lower than the traditional online systems and its bibliography is free.The FirstSearch service represents a newmode of online searching in the modern information age. At present, the databases and document types supplied by the FirstSearch system are fewer than those by DIALOG.Users had better
choose the suitable sysytem according to specific conditions.
This article first recalls the information revolution and procedure of the library modernization, then describes the services and means a modernized library should provide in detail. Nowadays, many countries make great investment in building their infomation highway and infrastructure and digital libraries, At this moment, we have to face to the reality of grasping the opportunity, studying the key technology,and training our staff to meet the challenge of our age.
The library sources service and application system based on SYBASE is a complex information service system. It is running on the CERNET environment,and is mainly used in the library information retrieving and INTERNET services.The ways to access the system are client/server,terminl/emulating terminal and WWW. The system also provides E-mail,FTP and TELNET services.
There are more and more forms of publications ,different type materials,different language materials,etc.To adapt this changes,USMARC format has been revised and improved.
An analysis of the characteristics and steps of developing multimedia electronic publications is given, and the design and develpment process for Multimedia Chinese Character Teaching Dictionary are introduced in this article.
Based on the various characteristics of sounds in the world,the article discusses the theory of sampling and propagation of the sound Information in the Humanities Information multimedia system and its realization method.
The authors summarized their rich experience in maintenance of the offset printing machine 1800AWD commen troubles and stoppage have been analysed and some ideas for mechanical regulation and electric service have been offered for the reference by the concerned technicians.