Generalized upper and lower approximations in set-valued information systems

@article{Liu2009GeneralizedUA,
  title={Generalized upper and lower approximations in set-valued information systems},
  author={Qiong Liu and Zheng Pei and Liangzhong Yi and Jilin Yang},
  journal={2009 IEEE International Conference on Fuzzy Systems},
  year={2009},
  pages={616-620}
}
Under the framework of set-valued information system, based on application of quantifiers and OWA operator, the definition on upper and lower approximations is generalized to the common form associated with the parameter λ∊ [0, 1]. The advantage of such generalization is that it could be flexibly used by restriction of additional linguistic quantifier, and… CONTINUE READING