The Inherent Inefficiency of KB Query Evaluation
知识库查询的固有低效性

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.