关键词: 粗糙集, 模糊集, 鱼病诊断, 模糊信息表, 包含度, 模糊粗糙集

Abstract: Such uncertainties are addressed as randomness of fish diseases diagnosis，fuzziness of diagnostic information and incompleteness of information acquisition.A fuzzy process in diagnosing fish diseases is illustrated firstly，the challenge of which lay in obtaining the matrix.As rough set theory called for no priori knowledge，it is then employed in diagnosing fish diseases.The symptoms of fish diseases fuzzy sets form condition attribute and the decision attribute from disease fuzzy set make up a fuzzy information table.Fuzzy information table attribute reduction and algorithms steps of rule acquisition of fish diseases diagnosis are analyzed.An example is finally demonstrated about the diagnostic process of the rules acquisition of fish diseases so as to provide a new method in fish disease diagnosis.

Key words: rough set, fuzzy set, fish disease diagnosis, fuzzy information table, inclusion degree, fuzzy rough set