领域CBR本体及其在范例表示和范例修改中应用研究

Domain CBR ontology and its application study in case representation and revision

范例表示和范例修改是基于实例推理领域中的两个研究热点.针对此,提出一种基于领域CBR本体的范例表示和范例修改方法,该方法引入本体表示范例,添加范例特征意图项指导范例修正,提高了范例库的重用性和范例修正的成功率.首先,以经典本体概念和CBR理论为基础,提炼出领域CBR本体的定义和主要组成部分.其次,与传统范例表示方法对比,给出了领域CBR本体范例表示的优势,并对领域CBR本体中的关键类——范例特征意图类及其作用进行了重点介绍.而后,对领域CBR本体的构建过程和基于领域CBR本体的范例修改过程进行了详细阐述.最后,应用OWL语言对斗轮CBR本体进行了描述,并通过斗轮CBR本体在机械设计重用中的应用分析验证了此方法的有效性.

Case representation and case revisioh are two research hotspots in case-based reasoning （CBR） field. A new case representation and case revision method based on domain CBR ontology is proposed. In this method, the reusability of case base is improved by making use of ontology to represent cases. The successful rate of case revision is raised by adding case feature intention class to domain CBR ontology. Firstly, with classical concept of ontology and CBR theory as foundation, the definition and components of domain CBR ontology are abstracted. Secondly, the superiorities of ontology over traditional way of case representation are given and the key class of domain CBR ontology - case feature intention class and its function are emphatically introduced. Thirdly, the detailed processes of construction of domain CBR ontology and case revision based on domain CBR ontology are given. In the end, domain CBR ontology of bucket wheel, named bucket wheel CBR ontology, is described in an ontology description language OWL. By application analysis of bucket wheel CBR ontology in bucket wheel design reuse, the validity of this case representation and case revision method is proved.