Volume 23 (2026)
Volume 22 (2025)
Volume 21 (2024)
Volume 20 (2023)
Volume 19 (2022)
Volume 18 (2021)
Volume 17 (2020)
Volume 16 (2019)
Volume 15 (2018)
Volume 14 (2017)
Volume 13 (2016)
Volume 12 (2015)
Volume 11 (2014)
Volume 10 (2013)
Volume 9 (2012)
Volume 8 (2011)
Volume 7 (2010)
Volume 6 (2009)
Volume 5 (2008)
Volume 4 (2007)
Volume 3 (2006)
Volume 2 (2005)
Volume 1 (2004)
Number of Articles: 16
merge cover ijfs- vol.17-no.3 June 2020
Volume 17, Issue 3 , May and June 2020
Abstract
Read MoreA new quadratic deviation of fuzzy random variable and its application to portfolio optimization
Volume 17, Issue 3 , May and June 2020, Pages 1-18
Abstract
The aim of this paper is to propose a convex risk measure in the framework of fuzzy random theory and verify its advantage over the conventional variance approach. For this purpose, this paper defines the quadratic deviation (QD) of fuzzy random variable as the mathematical expectation of QDs of fuzzy ... Read MoreNew optimality conditions for multiobjective fuzzy programming problems
Volume 17, Issue 3 , May and June 2020, Pages 19-31
Abstract
In this paper we study fuzzy multiobjective optimization problems defined for $n$ variables. Based on a new $p$-dimensional fuzzy stationary-point definition, necessary efficiency conditions are obtained. And we prove that these conditions are also sufficient under new fuzzy generalized ... Read MoreExtended and infinite ordered weighted averaging and sum operators with numerical examples
Volume 17, Issue 3 , May and June 2020, Pages 33-41
Abstract
This study discusses some variants of Ordered WeightedAveraging (OWA) operators and related information aggregation methods. Indetail, we define the Extended Ordered Weighted Sum (EOWS) operator and theExtended Ordered Weighted Averaging (EOWA) operator, which are applied inscientometrics evaluation ... Read MoreSuper- and sub-additive transformations of aggregation functions from the point of view of approximation
Volume 17, Issue 3 , May and June 2020, Pages 43-49
Abstract
The way super- and sub-additive transformations of aggregation functions are introduced involve suprema and infima taken over simplexes whose dimensions may grow arbitrarily. Exact values of such transformations may thus be hard to determine in general. In this note we discuss methods of algorithmic ... Read MoreAn extended hesitant group decision-making technique based on the prospect theory for emergency situations
Volume 17, Issue 3 , May and June 2020, Pages 51-68
Abstract
Throughout the present manuscript, we are going to introduce a novel group emergency decision-making technique in which the application of prospect theory explains the psychological behaviour of the decision maker who is affected by the hesitancy and uncertainty of cognition in decision making problems.\\Instead ... Read MoreTrend analysis in L-fuzzy contexts with absent values
Volume 17, Issue 3 , May and June 2020, Pages 69-84
Abstract
Sometimes we have to work with $L$-fuzzy context sequences where one or more values are missing. These sequences can represent, among other things, the evolution in time of an $L$-fuzzy context. The studies of tendencies that we have done so far used tools that are not valid when the $L$-fuzzy ... Read MoreUsing necessarily weak efficient solutions for solving a biobjective transportation problem with fuzzy objective functions coefficients
Volume 17, Issue 3 , May and June 2020, Pages 85-102
Abstract
This paper considers a biobjective transportation problem with various fuzzy objective functions coefficients. Fuzzy coefficients can be of different types such as triangular, trapezoidal, (semi) $L-R$, or flat (semi) $L-R$ fuzzy numbers. First, we convert the problem to a parametric interval biobjective ... Read MoreThe left (right) distributivity of semi-t-operators over 2-uninorms
Volume 17, Issue 3 , May and June 2020, Pages 103-116
Abstract
Recently the distributive equations involving various classes of aggregation operators have aroused widespread attention because of their importance in the theoretic and applied communities of fuzzy set theory. 2-uninorms and semi-t-operators are two special classes of aggregation operators and have ... Read MoreHesitant q-rung orthopair fuzzy aggregation operators with their applications in multi-criteria decision making
Volume 17, Issue 3 , May and June 2020, Pages 117-134
Abstract
The aim of this manuscript is to present a new concept of hesitant q-rung orthopair fuzzy sets (Hq-ROFSs) by combining the concept of the q-ROFSs as well as Hesitant fuzzy sets. The proposed concept is the generalization of the fuzzy sets, intuitionistic fuzzy sets, hesitant fuzzy sets, and Pythagorean ... Read MoreRule-based joint fuzzy and probabilistic networks
Volume 17, Issue 3 , May and June 2020, Pages 135-149
Abstract
One of the important challenges in Graphical models is the problem of dealing with the uncertainties in the problem. Among graphical networks, fuzzy cognitive map is only capable of modeling fuzzy uncertainty and the Bayesian network is only capable of modeling probabilistic uncertainty. In many real ... Read MoreInterpolating time series based on fuzzy cluster analysis problem
Volume 17, Issue 3 , May and June 2020, Pages 151-161
Abstract
This study proposes the model for interpolating time series to use them to forecast effectively for future. This model is established based on the improved fuzzy clustering analysis problem, which is implemented by the Matlab procedure. The proposed model is illustrated by a data set and tested ... Read MoreThe role of states in triangle algebras
Volume 17, Issue 3 , May and June 2020, Pages 163-176
Abstract
In this paper, we enlarge the language of triangle algebra by addinga unary operation that describes properties of a state. Thesestructure algebras are called state triangle algebra. The vitalproperties of these algebras are given. The notion of state interval-valued residuated lattice (IVRL)-filters ... Read MoreComplex fuzzy Hv-subgroups of an Hv-group
Volume 17, Issue 3 , May and June 2020, Pages 177-186
Abstract
The concept of complex fuzzy sets is a generalization of ordinary fuzzy sets. In this paper, we introduce the concept of complex fuzzy subhypergroups ($H_{v}$-subgroups) as well as the concept of complex anti-fuzzy subhypergroups ($H_{v}$-subgroups). We investigate their properties and their relations ... Read MorePower allocation rules under fuzzy behavior and multicriteria situations
Volume 17, Issue 3 , May and June 2020, Pages 187-198
Abstract
In this paper, we adopt supreme-utilities among fuzzy level (decision) vectors to propose a power allocation rule, its efficient extension and normalization in the framework of multicriteria fuzzy transferable-utility (TU) games. We also provide several axiomatic results to present the rationality for ... Read Moremerge of translation vol.17- No.3 June 2020
Volume 17, Issue 3 , May and June 2020, Pages 201-214