Browsing by Author "Allahviranloo, Tofigh"
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An algorithm for choosing a good shape parameter for radial basis functions method with a case study in image processing
Ghalichi, Shabnam Sadat Seyed; Amirfakhrian, Majid; Allahviranloo, Tofigh (Elsevier B.V., 2022)Some efficient radial basis functions (RBFs) have a free parameter called the shape parameter that controls the shape of approximating function. This parameter is mainly selected by trial and error related to the problem. ... 
Analysis on determining the solution of fourthorder fuzzy initial value problem with Laplace operator
Akram, Muhammad; Ihsan, Tayyaba; Allahviranloo, Tofigh; AlShamiri, Mohammed M. Ali (AMER INST MATHEMATICAL SCIENCESAIMS, 2022)This study presents a new analytical method to extract the fuzzy solution of the fuzzy initial value problem (FIVP) of fourthorder fuzzy ordinary differential equations (FODEs) using the Laplace operator under the strongly ... 
Attractiveness of pseudo almost periodic solutions for delayed cellular neural networks in the context of fuzzy measure theory in matrixvalued fuzzy spaces
Eidinejad, Zahra; Saadati, Reza; Allahviranloo, Tofigh (SPRINGER HEIDELBERG, 2022)In this paper, considering fuzzy measure theory and matrixvalued fuzzy norm spaces, we study a differential system of nonautonomous cellular neural networks with mixed delays (NACNNMD). Our main goal is to investigate ... 
The best approximation of generalized fuzzy numbers based on scaled metric
Allahviranloo, Tofigh; Saneifard, Rasoul; Saneifard, Rahim; Kiani, Farzad; Noeiaghdam, Samad; Govindan, Vediyappan (HINDAWI LTD, 2022)The ongoing study has been vehemently allocated to propound an ameliorated alphaweighted generalized approximation of an arbitrary fuzzy number. This method sets out to lessen the distance between the original fuzzy set ... 
Bifurcation and multiplicity of solutions of the navierstokes equations in driven semielliptical cavity flow
Erturk, Ercan; Allahviranloo, Tofigh (MDPI, 2022)In this paper, bifurcations in the solution of the NavierStokes equations are studied and multiple solutions of the driven semielliptical cavity flow are presented. The twodimensional steady incompressible driven viscous ... 
Classical and intelligent methods in model extraction and stabilization of a dualaxis reaction wheel pendulum: a comparative study
Tavakol Aghaei, Vahid; Akbulut, Batuhan Ekin; Tan, Deniz; Allahviranloo, Tofigh; Fernandez Gamiz, Unai; Noeiaghdam, Samad; Bezci, Yuksel Ediz (Elsevier B.V., 2022)Controlling underactuated openloop unstable systems is challenging. In this study, first, both nonlinear and linear models of a dualaxis reaction wheel pendulum (DARWP) are extracted by employing Lagrangian equations ... 
A computational method for nonlinear Burgers’ equation using quartictrigonometric tension Bsplines
Yigit, Gulsemay; Hepson, Ozlem Ersoy; Allahviranloo, Tofigh (Springer Medizin, 2022)This work proposes a finite element method emphasizing with quartictrigonometric basis functions for finding the numerical solution of nonlinear Burgers’ equation. The computational scheme is constructed by a discretized ... 
Conditions to guarantee the existence of solutions for a nonlinear and implicit integrodifferential equation with variable coefficients
Li, Chenkuan; Saadati, Reza; Allahviranloo, Tofigh (WILEY, 2022)Using Babenko's approach, multivariate MittagLeffler (MML) function, and Krasnoselskii's fixed point theorem, we first investigate the existence of solutions to a LiouvilleCaputo nonlinear integrodifferential equation ... 
An efficient numerical method for solving mpolar fuzzy initial value problems
Akram, Muhammad; Saqib, Muhammad; Bashir, Shahida; Allahviranloo, Tofigh (Springer Science and Business Media Deutschland GmbH, 2022)Several problems in the field of science and technology are modeled with information about the situation that is ambiguous, imprecise, or incomplete. That is, the information about values of parameters, functional ... 
The exact solutions of the conformable timefractional modified nonlinear schrodinger equation by the trial equation method and modified trial equation method
Aderyani, S.R.; Saadati, R.; Vahidi, J.; Allahviranloo, T. (Hindawi, 2022)Using the trial equation method (TEM) and modified trial equation method (MTEM), firstly, we find the analytical solutions of the conformable timefractional modified nonlinear Schrödinger equation (CTFMNLSE), and finally, ... 
Existence, uniqueness and matrixvalued fuzzy mittag–leffler–hypergeometric–wright stability for p hilfer fractional differential equations in matrixvalued fuzzy banach space
Aderyani, Safoura Rezaei; Saadati, Reza; Allahviranloo, Tofigh (Springer Science and Business Media Deutschland GmbH, 2022)We introduce a new class of fuzzy control functions and define the concept of matrixvalued fuzzy Mittag–Leffler–Hypergeometric–Wright stability. Then, we apply Radu–Mihet method derived from an alternative fixed point ... 
Finitetime stability of mild solution to timedelay fuzzy fractional differential systems under granular computing
Dong, Nguyen Phuong; Son, Nguyen Thi Kim; Allahviranloo, Tofigh; Tam, Ha Thi Thanh (Springer Nature, 2022)In this work, based on the concept of the granular Caputo fractional derivative, a class of fuzzy fractional differential systems with finitetime delay is investigated. We firstly introduce the concept of MittagLeffler ... 
Fuzzy control problem via random multivalued equations in symmetric FnNLS
Saadati, Reza; Allahviranloo, Tofigh; O'Regan, Donal; Alshammari, Fehaid Salem (MDPI, 2022)To study an uncertain case of a control problem, we consider the symmetric FnNLS which is induced by a dynamic norm inspired by a random norm, distribution functions, and fuzzy sets. In this space, we consider a random ... 
Fuzzy generalized fractional power series technique for simulating fuzzy fractional relaxation problem
Ebdalifar, Khatereh; Allahviranloo, Tofigh; RostamyMalkhalifeh, Mohsen; Behzadi, Mohammad Hassan (Springer link, 2022)In this paper, the fuzzy generalized fractional power series method is proposed to obtain the numerical solutions of a class of fuzzy fractional relaxation problems. For this purpose, the fuzzy generalized fractional power ... 
Generalized Hukuhara conformable fractional derivative and its application to fuzzy fractional partial differential equations
Ghaffari, Manizheh; Allahviranloo, Tofigh; Abbasbandy, Saeid; Azhini, Mahdi (SPRINGER, 2022)The main focus of this paper is to develop an efficient analytical method to obtain the traveling wave fuzzy solution for the fuzzy generalized Hukuhara conformable fractional equations by considering the type of generalized ... 
Interval model for calculating prospect cross efficiency of data envelopment analysis and providing a solution for its expansion in fuzzy model
Rahmani, Amir; RostamyMalkhalifeh, Mohsen; Lotfi, Farhad Hosseinzadeh; Allahviranloo, Tofigh (SEMNAN UNIV, 2021)Cross efficiency evaluation of data envelopment analysis (DEA) is an effective tool in measuring the performance of decisionmaking units. In general, in cross efficiency evaluation models, it is assumed that decision ... 
Introducing a trapezoidal interval type2 fuzzy regression model
Mokhtari, M.; Allahviranloo, T.; Behzadi, M.H.; Lotfi, F.H. (IOS Press, 2022)The uncertainty is an important attribute about data that can arise from different sources including randomness and fuzziness, therefore in uncertain environments, especially, in modeling, planning, decisionmaking, and ... 
Introducing and solving the hesitant fuzzy system A X = B
Babakordi, Fatemeh; Allahviranloo, Tofigh (Systems Research Institute, Polish Academy of Sciences, 2022)In this paper the solution for hesitant fuzzy system as AX = B is introduced where A is an n ×n known hesitant fuzzy matrix, B is an n ×1 known hesitant fuzzy vector and X is an n ×1 unknown hesitant fuzzy vector. First, ... 
A method for solving bipolar fuzzy complex linear systems with real and complex coefficients
Akram, M.; Ali, M.; Allahviranloo, T. (Springer Science and Business Media Deutschland GmbH, 2022)An extensive variety of human decision making is based on twosided or bipolar cognitive assessment of a positive side and a negative side. Zhang’s bipolar fuzzy set is represented as {∀(x,y)(x,y)∈[1,0]×[0,1]}.The ... 
Modified grasshopper optimization algorithm optimized adaptive fuzzy leadlag controller for coordinated design of FACTS controller with PSS
Sahu, Preeti Ranjan; Hota, Prakash Kumar; Panda, Sidhartha; Long, Hoang Viet; Allahviranloo, Tofigh (IOS PRESS, 2022)This paper proposes adaptive fuzzy leadlag controller structures for power system stabilizer and flexible AC transmission system based damping controllers to increase the stability of power system. The parameters of the ...