On the basis of the nation wide database survey,status and issues of the databases in China have been statistically analyzed in this paper.A comparison with the development of databases outside China has been made in order to clarify the current level of database industry and the gap to be filled.To tackle the problems confronting us,some suggestions on the further development of electronic information resources have been made.
The components,functions and characteristics of DNRC are briefly described in this paper.The major applications are also introduced.
The Microbial Resource Database of China(MRDC)was founded in 1986.The MRDC includes the databases of catalogue of strain,bacteria names,microbial characters and multimedia database of economic fungi in China.For sharing the information resources of the MRDC in a larger area,a world wide web server in Internet is set up.Its address is http://www.im.ac.cn.This paper introduces the history,current status,and future of the MRDC.The data contents of each sub databases in the MRDC are also described.
Recently,the construction of regional science and technology information networks that are located in certain areas is developing rapidly during the building of our country s science and technology information networks.This paper has summarized the outlines and characteristics of construction on the regional science and technology information networks and location of this kind of networks.This work gives a good reference to the communication network platform, the system hardware and software platform,the database platform , the development of information resources, and the construction of regional science and technology infrmation networks.
This paper summarizes the emergence and the development of campus networks,gives a general situation of the campus networks in USA and China, discusses the relationship between the library automation system and the campus network, and studies their interconnection.
The paper,after summing up the information searching methods and principles in the World Wide Web,gives two main methods of information searching:hypertext based and search engine based.It lays the stress on the technique specifications and characteristics of the search engines in the World Wide Web.Finally,it introduces the functions and the operating procedure of a well known search engine WebCrawler.
This paper describes the significant position and guiding role of new models in the whole process of developing modern library information systems in China.In order to change the backward situation of the Chinese libraries in terms of their modern information systems and catch up with the advanced level of the world,the author puts forward some new concepts and provides concrete model to realize them.
In this paper,we give a overview of the application system architecture based on Sybase system. This system is designed and used in our library, but the accessing speed to it is very important, So we discuss it in detail. Many factors,such as database model, table attributes, row size, query results, many new technologies and characters of Sybase, etc.,are described. Our experience with Sybase and PowerBuilder is introduced too.
This artical analyses the importance of scanning and recognition technology for database construction, and introduce some perfect founctions of Typereader,which are much more advanced than other OCR series.
In this paper,the storage forms of sound and image information are first discussed.Then,the authors study and analyse methods and technology that can be used in sound and image retrieval,and give classified expositions.Meanwhile,this paper makes comparative research on data models of the multimedia information retrieval system(MIRS),proposes that the design of MIRS may base on a RDB system,and it can support storage and retrieval of sound and image information by expanding its ability of managing complex objects and multimedia data.
This paper introduces the contents, structure,features,retrieval functions and service of the BA CD ROM database,and its technology developments.
