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An interpretation of focal elements as fuzzy sets

โœ Scribed by Ewa Straszecka

Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
246 KB
Volume
18
Category
Article
ISSN
0884-8173

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โœฆ Synopsis

This article proposes defining focal elements in the Dempster-Shafer theory as fuzzy sets in an application to medical diagnosis support. Membership functions for medical parameters of "fuzzy" nature are constructed. A diagnosis support consists of Bel measure calculation only for these focal elements that have membership function values grater than a "truth" threshold. Coherence between membership function shapes and the truth threshold is shown and a new way of membership function designing is proposed. An extension of the "truth" threshold for nonfuzzy focal elements is proposed that make a unification of symptoms interpretation during diagnosis support possible.

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