%0 Journal Article
%T The Inherent Inefficiency of KB Query Evaluation<br>知识库查询的固有低效性
%A Zhu Yangyong
%A <br>朱扬勇
%J 计算机科学
%D 1994
%I 
%X This paper introduces the concepts of knowledge-base system and the scale of knowledge-base's application, analyses the method of knowledge-base query evaluation, and presents several obstacles during this evaluation. All of them cannot be well treated by current hardware techniques and software methods. Therefore inefficiency of knowledge-base queries are inherent today. Finally several research directions of the query optimization of knowledge-base systems are given.
%K Knowledge-base
%K Logic Program
%K Query Qptimization<br>数据库
%K 知识库
%K 查询
%K 低效性
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=64A12D73428C8B8DBFB978D04DFEB3C1&aid=0D3B525F293139B40659EA0A1FA27ADF&yid=3EBE383EEA0A6494&vid=659D3B06EBF534A7&iid=38B194292C032A66&sid=0401E2DB1F51F8DE&eid=5C3443B19473A746&journal_id=1002-137X&journal_name=计算机科学&referenced_num=0&reference_num=0