计算机科学 ›› 2014, Vol. 41 ›› Issue (12): 206-210.doi: 10.11896/j.issn.1002-137X.2014.12.045

• 人工智能 • 上一篇    下一篇

描述逻辑FL0概念及术语公理集的表达能力刻画

申宇铭,文习明,王驹   

  1. 广东外语外贸大学思科信息学院 广州510420;广东省委党校信息技术教研部 广州510053;广西师范大学计算机科学与信息工程学院 桂林541004;高可信软件技术教育部重点实验室 北京100871
  • 出版日期:2018-11-14 发布日期:2018-11-14
  • 基金资助:
    本文受国家自然科学基金(61103169),高可信软件技术教育部重点实验室开放课题(HCST201302)资助

Characterizing Expressive Power for Concept Descriptions and Terminological Axioms Boxes in Description Logic FL0

SHEN Yu-ming,WEN Xi-ming and WANG Ju   

  • Online:2018-11-14 Published:2018-11-14

摘要: 表达能力和推理复杂性是一个逻辑的两个重要特征,也是一对相互制约的关系。解释之间的互模拟关系是从语义的角度刻画逻辑表达能力的一个有效途径,其代表性的结果是命题模态逻辑表达能力的刻画定理-van Benthem 刻画定理。文中给出了描述逻辑FL0(含构造子:原子概念、顶概念、概念交、全称量词约束)的模拟关系,建立了FL0中概念和术语公理集的表达能力刻画定理,即一阶逻辑公式与FL0概念和术语公理集等价的充分必要条件。上述结果为寻求表达能力与推理复杂性之间的最佳平衡提供了有效的支持。

关键词: 描述逻辑,概念描述,术语公理集,表达能力

Abstract: The two most important properties of a logic are its expressive power and the complexity of the reasoning problems,which are also an opposing relation in the logic.Bisimulations between interpretations are the effective way to characterize the expressive power,and a classical result is the van Benthem characterizing theorem,which gives an exact condition that a first-order formula with one free variable is equivalent to a modal logic formula.In this paper,a simulation for FL0(including atomic concept,top concept,conjunction concept and universal quantification) was given.Based on the simulation,the characterizing theorems of expressive power for concept descriptions and TBoxes are sufficient and necessary conditions that a first-order formula is equivalent to a concept description or a TBox is set up.The above results provide effective supports for the tradeoff between the expressive power and the complexity of reasoning problems.

Key words: Description logic,Concept description,Tterminological axioms box,eExpressive power

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