【摘要】 对不相容决策表分别使用3种知识约简方法(代数方法、信息熵方法和差别矩阵方法)得到的结果可能不同。在此概括这些知识约简并介绍其在分析不相容决策表中的作用。因此对于知识约简方法的选择,可以由不同决策粒度的需求决定,从而可以在相似和不确定推理的模型下生成合适的决策规则。结论对今后数据预处理的模型和算法的研究有一定作用。更多还原

【Abstract】 The results obtain by using three knowledge reduction approaches (algebra approach,information approach and discernibility-matrix-based approach) respectively may be different in inconsistent decision table.This paper is devoted to generalize those reducts and reveal those reducts’ usefulness in case of analyzing inconsistent decision table.Hence,the selection of knowledge reduction approaches can be determined by the request of different levels of decision granularity so as to generate proper decision rules in the model of approximate and uncertain reasoning about knowledge.The conclusions are beneficial in further studies on models and algorithms of data preprocessing to control the degree of the conflicting for decision table.更多还原