21. The two definitions for type-1 OWA operators are based on Zadeh's Extension Principle and \ alpha-cuts of fuzzy sets . 22. Possibility theories like, for instance, fuzzy sets , fuzzy logic and possibility theory are alternatives to probability to model uncertainty. 23. Accordingly, fuzzy classification is the process of grouping individuals having the same characteristics into a " fuzzy set ". 24. In practice, this series of \ alpha-level type-1 OWA operators is used to construct the resulting aggregation fuzzy set . 25. Topic 7 . " Forming effective teams based on socionics model " : Fuzzy sets : terms and definitions. 26. Where " F " is a differential variational inequalities, projected dynamical systems, dynamic Coulomb friction problems and fuzzy set arithmetic. 27. This approach is firstly introduced at 2012 by Pishvaee, Razmi & Torabi in the Journal of Fuzzy Sets and Systems. 28. The advantage of this approach is that it makes it possible to draw conclusions from imprecise information by manipulating fuzzy sets . 29. Van Valen originated the concept of fuzzy sets , prior to the formalization of this concept by L . A . Zadeh. 30. Work on type-2 fuzzy sets languished during the 1980s and early-to-mid 1990's, although a small number of articles were published about them.
