%0 Journal Article
%T MATHEMATICAL EXPRESSION OF DOCUMENTA-TION LANGUAGES<br>论文献语言的数学表达式
%A Tang Zhaokui
%A <br>汤兆魁
%J 现代图书情报技术
%D 1995
%I 
%X The paper describes mathematical expression of documentation Languages, discusses mainly mathematical expression of terms Concrete content includes:(1)recall rate,precision rate,omission factor,noise factor,rational reject rate and discrete factor ,(2)Boolean retrieval;(3)related evaluation;(4 )bibliographic information structure,(5)index table structure;(6)coordination indexing;(7)weighted function etc. It has research importance and practical valueto the guantitative analysis for the documentation and information as well as communication and transmission of information, especially to the information retrieval services.
%K 情报检索语言
%K 数学表达式
%K 主题法
%K 叙词
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=B5EDD921F3D863E289B22F36E70174A7007B5F5E43D63598017D41BB67247657&cid=E46382710BF131B2&jid=24AADBCD0D5373C73F37F78D10E2F717&aid=9B5B6C76A4EFDE3CD75996997D64C0F5&yid=BBCD5003575B2B5F&vid=708DD6B15D2464E8&iid=B31275AF3241DB2D&sid=B91E8C6D6FE990DB&eid=D3E34374A0D77D7F&journal_id=1003-3513&journal_name=现代图书情报技术&referenced_num=1&reference_num=0