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: 15
cover IJFS-Vol 18-No 3-June 2021
Volume 18, Issue 3 , May and June 2021
Abstract
Read MoreFuzzy logic and enriched categories
Volume 18, Issue 3 , May and June 2021, Pages 1-11
Abstract
We consider a category C enriched over the segment [0,1] whose hom-objects are real numbers from [0,1]. For a suitably defined function $\hat{v}$ assigning to each formula $\varphi$ some object of $\C$, the hom-object $\C(\hat{v} (\varphi),\hat{v}(\psi))$ represents the degree of derivability of ... Read More2-set-based extended functions
Volume 18, Issue 3 , May and June 2021, Pages 13-26
Abstract
We generalize set-based extended functions, recently introduced by Mesiar et al., into 2-set-based extended functions. In both cases, an efficient reduction of repeated data to be fused is considered which prepares a sound background for big data processing. We discuss and study several types of ... Read MoreUsing a fuzzy expert system as a decision support system to decrease time consumption in the UAST development process: A case study
Volume 18, Issue 3 , May and June 2021, Pages 27-38
Abstract
Always the decision of the government to the private sector is faced with the challenges and high level of importance, because these decisions should be taken at the meeting of standards and functional requirements to overcome investors' interests. These decisions include education, and due to the governance ... Read MoreA credibility approach on fuzzy slacks based measure (SBM) DEA model
Volume 18, Issue 3 , May and June 2021, Pages 39-49
Abstract
Data Envelopment Analysis (DEA) is a multi-criteria technique based on linear programming to deal with many real-life problems, mostly in nonprofit organizations. The slacks-based measure (SBM) model is one of the DEA model used to assess the relative efficiencies of decision-making units (DMUs). The ... Read MoreOn the fuzzy solutions of time-fractional problems
Volume 18, Issue 3 , May and June 2021, Pages 51-66
Abstract
The main purpose of this paper is to obtain an analytical solution for the time-fractional fuzzy equation. To do this, the time-fractional equation is transformed into an algebraic equation using the fuzzy Laplace and Fourier transforms. The fractional derivatives are described in the Caputo gH-differentiability. ... Read MoreC-continuous fuzzy posets
Volume 18, Issue 3 , May and June 2021, Pages 67-80
Abstract
In this paper, we develop the C-continuity via Scott Q-cotopological spaces, where Q is a commutative and integral quantale.The main results are: (1) The set of all C-compact elements of a completeQ-ordered set is irreducible complete; (2) The Scott Q-cotopology of a Q-ordered set under the fuzzy ... Read MoreConstruction methods for triangular norms and triangular conorms on appropriate bounded lattices
Volume 18, Issue 3 , May and June 2021, Pages 81-98
Abstract
In this study, new methods to construct triangular norms and triangular conorms on appropriate bounded lattices are introduced. Some illustrative examples are given for clarity. Also, the relation between introduced methods and some other approaches is investigated. Finally, it is shown that the introduced ... Read MoreJensen's inequalities for pseudo-integrals
Volume 18, Issue 3 , May and June 2021, Pages 99-109
Abstract
In this paper, we introduce a general$(\oplus,\otimes)$-convex function based on semirings $([a,b],\oplus, \otimes)$ with pseudo-addition $\oplus$ andpseudo-multiplication $\otimes.$ The generalization of the finiteJensen's inequality, as well as pseudo-integral with respect to$(\oplus,\otimes)$-convex ... Read MoreNew results on the migrativity properties for overlap (grouping) functions and uninorms
Volume 18, Issue 3 , May and June 2021, Pages 111-128
Abstract
Functional equations involving aggregation functions play an important role in fuzzy sets and fuzzy logic theory. That the migrativity equation as a kind of restricted general associative equation have been proven to be useful in a wide range of fields like decision making, aggregation of information, ... Read MoreMilstein method for solving fuzzy differential equation
Volume 18, Issue 3 , May and June 2021, Pages 129-141
Abstract
To solve fuzzy differential equations driven by Liu process, three Milstein schemes are proposed in this work, which are explicit Milstein scheme, semi-implicit Milstein scheme and improved Milstein scheme. Improved Milstein scheme is constructed by correcting the error with semi-implicit method, the ... Read MoreHyers-Ulam-Rassias stability of quaternion multidimensional fuzzy nonlinear difference equations with impulses
Volume 18, Issue 3 , May and June 2021, Pages 143-160
Abstract
In this paper, we consider the Hyers-Ulam-Rassias stability of theimpulsive fuzzy nonlinear difference equations in the multidimensional fuzzy quaternion space.Some sufficient conditions of the Hyers-Ulam-Rassias stability are established for the quaternion multidimensional fuzzy nonlinear difference ... Read MoreA bilateral fuzzy support vector machine hybridizing the Gaussian mixture model
Volume 18, Issue 3 , May and June 2021, Pages 161-177
Abstract
The fuzzy support vector machine is one of the most exceptional methods to deal with uncertainty in the classification problem. The membership function is a proper way to model uncertainty. The goal of the membership function is to distinguish the different points in terms of their importance. The ordinary ... Read MoreImproved fuzzy clustering algorithm using adaptive particle swarm optimization for nonlinear system modeling and identification
Volume 18, Issue 3 , May and June 2021, Pages 179-196
Abstract
In this paper, an improved Type2-PCM clustering algorithm based on improved adaptive particle swarm optimization called Type2-PCM-IAPSO is proposed. Firstly, a new clustering algorithm called Type2-PCM is proposed. The Type2-PCM algorithm can solve the problems encountered by fuzzy c-means algorithm ... Read Moretranslations IJFS-Vol 18-No 3-June 2021
Volume 18, Issue 3 , May and June 2021, Pages 199-211