基于系统中心本体的分层抽象模型

Hierarchical Abstraction Model Based on System-centered Ontology

本体类分层关系的确定,使得能够利用不同抽象度本体类之间的抽象映射自动构建物理世界的分层模型。根据本体类型的不同将已有的本体类定义为对象本体类(Object-based Ontology Class),并对流片段(Flow Fragment)的概念加以扩展,提出以系统为中心的流本体类(Flow-based Ontology Class)的概念。定义了流片段的行为不可区分性,从两个不同的方向讨论了流本体类的分层表示:一是对构成流本体类的流片段的不同抽象度分层扩展;二是对构成流本体类的不可区分的流片段的合并分层扩展。给出了流本体类的分层过程,定义了系统级的映射关系,即流片段之间的抽象映射,指出该映射为基于系统中心本体的模型抽象分层过程提供了直接的转换运算。并且,流本体类的分层关系的确定也为基于系统中心本体的模型设计任务提供了可共享和重用的机制。

The hierarchical ontology class makes it possible to automatically construct the hierarchical model of the physical world by using the abstract mapping relationship between ontology classes with different abstraction degrees.In this paper,we redefined Ontology Class as Object-based Ontology Class,and extended the definition of Flow Fragment to propose the system-centered concept of Flow-based Ontology Class.The behavior-indistinguishable flow fragments were defined.We discussed the hierarchical representation of the flow-based ontology class in two directions：the abstraction hierarchy of flow fragment and the aggregation of indistinguishable flow fragments.In the hierarchical structure,the abstraction mapping relationship between flow-based ontology classes was constructed to realize the hierarchical modeling process based on system-centered ontology.At the same time,the hierarchical relationship of flow-based ontology classes also provides a mechanism of system-centered knowledge sharing and reuse.