Healthcare tends to be one of the most complicated sectors, and hospitals exist at the core of
healthcare activities. One of the most significant elements in hospitals is service quality level …

By means of a fuzzy logical implicator and a t-norm (respectively denoted I and T), we
introduce covering based multigranulation (I, T)-fuzzy rough set models from fuzzy β …

It is not widely acknowledged that none of existing fuzzy β-neighborhood operators satisfies
the reflexivity when β≠ 1. To overcome this shortcoming, four types of fuzzy β-neighborhood …

The decision-making theory with three-way decisions (3WD) improves the either-or decision
results of the traditional multi-criteria decision-making (MCDM) methods and provides a …

In this article, a novel fuzzy α-neighborhood operator with reflexivity is constructed and a
new fuzzy rough set model based on the fuzzy α-neighborhood operator is proposed …

By means of a fuzzy coimplication operator J and a triangular conorm S, we set forth two
pairs of (J, S)-fuzzy rough set models, which are generalizations of fuzzy rough sets. Then …

In recent years, fuzzy β-covering, as a natural extension of fuzzy coverings, has attracted
considerable attention. However, existing fuzzy β-neighborhood operators cannot accurately …

Faces are highly important objects for humans and other primates because they convey
information about the identity of others, their emotional state, intention, gender, and age, and …

This paper proposes a reflexive fuzzy β-neighborhood operator by modifying Ma's fuzzy β-
neighborhood operators. Then, we use such an operator to build a covering-based variable …

Multi-attribute decision-making (MADM) can be regarded as a process of selecting the
optimal one from all objects. Traditional MADM problems with intuitionistic fuzzy (IF) …