Multilayered reasoning by means of conceptual fuzzy sets

✍ Scribed by Tomohiro Takagi; Atsushi Imura; Hirohide Ushida; Toru Yamaguchi

• Book ID: 102655606
• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 909 KB
• Volume: 11
• Category: Article
• ISSN: 0884-8173
• DOI: 10.1002/(sici)1098-111x(199602)11:2<97::aid-int2>3.0.co;2-t

✦ Synopsis

The real world consists of instances of events and continuous numeric values, while people represent and process their knowledge in terms of symbols. Fuzzy sets provide a strong notation connecting the symbolic representation to the real world. In previously proposed Conceptual Fuzzy Sets (CFS), the meaning of a concept is represented by the distribution of activations of labels in a bidirectional associative memory. In particular, a multilayered structured CFS represents the meaning of the same concept as it is used in various expressions in each layer. The propagation of activations corresponds to reasoning. Therefore, we propose a multilayered reasoning method associated to a multilayered structured CFS, which has the following features: (1) capable of simultaneous symbolic and quantitative processing, (2) capable of simultaneous top-down and bottom-up processing. The effectiveness of the proposed method is illustrated by practical examples of decision regarding the amount of steering in the task of parking a car, and recognition of facial expressions for an image understanding system.