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 vol.18-no.2-April 2021
Volume 18, Issue 2 , March and April 2021
Abstract
Read MoreOn the existence of solutions to interval-valued differential equations with length constraints
Volume 18, Issue 2 , March and April 2021, Pages 1-13
Abstract
In this paper, we consider the existence of solutions to first-order interval-valued differential equations with length constraints under gH-differentiability. By using the fixed point theory of compact maps on metric spaces, we provide some sufficient conditions for the existence of solutions. At the ... Read MoreFGM generated archimedean copulas with concave multiplicative generators
Volume 18, Issue 2 , March and April 2021, Pages 15-29
Abstract
The Farlie-Gumble-Morgenstren (FGM) family and archimedean family are the most popular parametric families of copulas. In the present paper, we propose an extension of archimedean copulas with concave multiplicative generators in the style of FGM family. In particular, our method allows ... Read MoreOn Goursat problem for fuzzy random partial differential equations under generalized Lipschitz conditions
Volume 18, Issue 2 , March and April 2021, Pages 31-49
Abstract
Fuzzy random partial differential equations (PDEs) present a connection between random dynamical systems with nonstatistical inexactness data. These blended models could be efficiently used in modeling dynamical systems working in vagueness and ambiguity environments such as fuzzy random adaptive control, ... Read MoreParameter estimation in fuzzy partial univariate linear regression model with non-fuzzy inputs and triangular fuzzy outputs
Volume 18, Issue 2 , March and April 2021, Pages 51-64
Abstract
This paper proposed an extension for the classical partial univariate regression model with non-fuzzy inputs and triangular fuzzy output. For this purpose, the popular non-parametric estimator and the conventional arithmetic operations of triangular fuzzy numbers were combined to construct a fuzzy ... Read MoreGlobal dissipativity of fuzzy bidirectional associative memory neural networks with proportional delays
Volume 18, Issue 2 , March and April 2021, Pages 65-80
Abstract
This article aimed to investigate the problem of global dissipativity of Fuzzy Bidirectional Associative Memory Neural Networks (FBAMNNs- for short) with proportional delays. Via Lyapunov Functionals (LFs- for short) and Linear Matrix Inequality (LMI- for short) approach, we obtained new sufficient ... Read MoreA novel method for ranking generalized fuzzy numbers with two different heights and its application in fuzzy risk analysis
Volume 18, Issue 2 , March and April 2021, Pages 81-91
Abstract
Due to the large use of fuzzy numbers, the ranking of these numbers is very important.In this paper, we propose a new method for ranking generalized fuzzy numbers with different left and right heights.The proposed method, at first obtains the centers of gravity of fuzzy numbers and left and right side ... Read MoreA novel interval-valued fuzzy multiple twin support vector machine
Volume 18, Issue 2 , March and April 2021, Pages 93-107
Abstract
Multiple twin support vector machine (MTSVM) which evaluates all the training data into a ``one-versus-rest'' structure is a multi-class classification algorithm. It has extensive applications in the multi-class classification problems. Like twin support vector machine (TSVM), MTSVM treats all sample ... Read MoreSemi-t-operators and idempotent semi-t-operators on bounded lattices
Volume 18, Issue 2 , March and April 2021, Pages 109-125
Abstract
Recently, Fang and Hu introduced the definition of semi-t-operators on bounded lattices. In this study, we propose several construction methods to obtain such a semi-t-operator from a given semi-t-conorm and semi-t-norm on bounded lattices. Furthermore, we discuss the presence of idempotent semi-t-operators ... Read MoreA new separated fault estimator and fault-tolerant control design strategy for uncertain nonlinear systems using T-S fuzzy modeling
Volume 18, Issue 2 , March and April 2021, Pages 127-138
Abstract
In this paper, a new separated design of adaptive observer-based fault estimator (FE) and fault-tolerant control (FTC) is introduced for nonlinear systems along with sensor and actuator faults in the presence of external disturbance and parametric modeling uncertainty by T-S fuzzy modeling, which can ... Read MoreBuilding fuzzy approach with linearization technique for fully rough multi-objective multi-level linear fractional programming problem
Volume 18, Issue 2 , March and April 2021, Pages 139-157
Abstract
This paper presents a suitable solution procedure to solve the fully rough multi-objective multi-level linear fractional programming (FRMMFP) problem. First, an extension of interval method is presented to deal with roughness of the stated problem. Then, an iterative technique is proposed for linearization ... Read MoreSynchronization of BAM Cohen--Grossberg FCNNs with mixed time delays
Volume 18, Issue 2 , March and April 2021, Pages 159-173
Abstract
This paper deals with the synchronization problem of bidirectional associative memory (BAM) Cohen-Grossberg fuzzy cellular neural networks (CGFCNNs) with discrete time-varying and unbounded distributed delays. Some sufficient conditions are obtained to guarantee the robust synchronizationof ... Read MoreNote on " Fuzzy universal algebras on L-sets"
Volume 18, Issue 2 , March and April 2021, Pages 175-186
Abstract
This note is the continuation of the paper entitled ``Fuzzy universal algebras on $L$-sets"(IJFS, Volume 16, Number 4, (2019), pp. 175--187) and it focuses on $\mathcal{Q}$-valued (universal) algebras on $\mathcal{Q}$-typed sets. When $\mathcal{Q}$ is an involutive quantaloid, some basic related notions ... Read MoreReliability analysis of a warm standby series-parallel system with different switches and bi-uncertain lifetimes
Volume 18, Issue 2 , March and April 2021, Pages 187-202
Abstract
The reliability of a warm standby series-parallel system without adequate samples is studied based on the uncertainty theory. It is assumed that the lifetimes of system elements follow independent uncertainty distributions with uncertain parameters. Three different switch models, including absolutely ... Read MorePersian-translation vol.18-no.2-April 2021
Volume 18, Issue 2 , March and April 2021, Pages 205-217