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''One person's noise is another person's signal " (Knorr, E., Ng, R. (1998). Algorithms for mining distance-based outliers in large datasets. In Proceedings of the 24th VLDB conference, New York (pp. 392–403)). In recent years, much attention has been given to the problem of outlier detection, whose aim is to detect outliers – objects which behave in an… (More)

In this paper, we suggest to exploit the framework of rough set for detecting outliers — individuals who behave in an unexpected way or feature abnormal properties. The ability to locate outliers can help to maintain knowledge base integrity and to single out irregular individuals. First, we formally define the notions of exceptional set and minimal… (More)

Traditional Chinese medicine has developed over more than 4000 years. A tremendous amount of medical knowledge has been accumulated, among which herbal drugs and formulae are an important portion. This paper presents an ontology for traditional Chinese drugs and formulae, and an ontology-based system for extracting knowledge of drugs and formulae from… (More)

- Cungen Cao, Qiangze Feng, Ying Gao, Fang Gu, Jinxin Si, Yuefei Sui +7 others
- J. Comput. Sci. Technol.
- 2002

- Shilong Ma, Yuefei Sui, Ke Xu
- ICLP
- 2002

Given a sequence {Πn} of Horn logic programs, the limit Π of {Πn} is the set of the clauses such that every clause in Π belongs to almost every Πn and every clause in infinitely many Πn's belongs to Π also. The limit program Π is still Horn but may be infinite. In this paper, we consider if the least Herbrand model of the limit of a given Horn logic program… (More)