PHƯƠNG PHÁP SO SÁNH ĐỐI TƯỢNG MỜ

Abstract

The concept of comparison plays a decisive role in the management-related issues in the object-oriented database model. In the object-oriented database model, the object comparison is easiy handled based on the concept of the object identification and the equality of values. However, when dealing with either inaccurate or vague objects, such questions as “to what extent are the two objects equal? Or “how equivalent are the two objects?” will not be clearly answered, as the concept of “equal” becomes fuzzy. In this paper, the methods of comparing the objects in a fuzzy environment are presented on the base of the hedge algebra approach.  Based on the semantic proximity of the hedge algebra, the comparison of data with uncertain information and canonical data are completely consistent in order to ensure the consistency of the data types.

Keywords: comparison, fuzzy algebra, object identity, uncertain informatio