领域知识形式背景规范化理论研究

领域知识形式背景是描述某个学科领域中概念及概念间关系的重要知识载体,在很大程度上决定了知识表达的规模和精确程度。本文针对临床诊断领域形式背景中知识表示的完备与精简问题,以高血压疾病为载体,综合考虑概念格内对象与属性间的不同层次关系,区别对待具有不同重要性的背景属性,提出形式背景属性约简理论与方法,给出消除背景冗余的Ⅱ度规范理论,并在此基础上寻找到解决形式背景缺值的满值化方法。

Research on the Formal Context and Related Theories Oriented Domain Knowledge of Hypertension Disease

Formal context is the basis of concept lattice theory. And it largely determines the scale and accuracy of the expression of domain knowledge. In this paper, the knowledge of completeness and reduction in formal context is mainly discussed, jointly considering the different hierarchies relationship between objects and attributes in concept lattice. The attribute of different importance is handled differently. The theory and methods about the approximation reduction of formal context is proposed. The degree II of gauge theory dealing with the redundancy is also prospected, depending on which the way to solve the missing-value context is analyzed.