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考虑一种广义的不完备信息系统,其中同时具有缺席和遗漏型未知属性值.在这种广义的不完备信息系统中,深入研究特征关系,探讨根据特征关系进行分类而有可能出现的2种不合理的情形,进而提出Ⅰ型和Ⅱ型2种特征关系.在此基础上,结合这两者的优点,构建Ⅲ型特征关系.最后用1个实例说明3种特征关系在处理广义不完备信息系统时的有效性.
Consider a generalized incomplete information system with both missing and missing unknown attribute values. In this generalized incomplete information system, we study the relationship of features in detail and discuss the possible two kinds of incomplete information systems And then put forward two kinds of characteristic relations of type I and type II.On the basis of this, combining the advantages of the two, it constructs the type III characteristic relationship.Finally, an example is given to illustrate the relationship between the three kinds of characteristic relations in dealing with the generalized incomplete Effectiveness of the information system.