不完备信息系统下的LA最大相容类粗糙集模型

摘要

Nowadays there exists several extensions for rough set theory to handle incomplete information systems, such as tolerance relation model, similarity relation model and other models derived from the former two. Presented in this paper is an improved rough set based on limited tolerance relation with the concept of a maximal compatible class. The new model, which is called rough set based on LA maximal compatible classes, creates a better approximation accuracy. At last, attributes reduct in this new model is discussed.%目前处理不完备信息系统已经有了容差关系、相似关系等推广的粗糙集模型,以及这两种模型的改进形式.基于限制容差关系,提出了一种新的相容类的概念——LA最大相容类,并建立LA最大相容类粗糙集模型.通过对比分析得出LA最大相容类粗糙集模型可以获得更高的近似精度,并讨论了在此模型下属性的约简问题.