Browsing by Author "Allahviranloo, Tofigh"
Now showing items 1-20 of 39
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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 fourth-order fuzzy initial value problem with Laplace operator
Akram, Muhammad; Ihsan, Tayyaba; Allahviranloo, Tofigh; Al-Shamiri, Mohammed M. Ali (AMER INST MATHEMATICAL SCIENCES-AIMS, 2022)This study presents a new analytical method to extract the fuzzy solution of the fuzzy initial value problem (FIVP) of fourth-order 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 matrix-valued fuzzy spaces
Eidinejad, Zahra; Saadati, Reza; Allahviranloo, Tofigh (SPRINGER HEIDELBERG, 2022)In this paper, considering fuzzy measure theory and matrix-valued fuzzy norm spaces, we study a differential system of non-autonomous cellular neural networks with mixed delays (NA-CNN-MD). 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 alpha-weighted 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 navier-stokes equations in driven semi-elliptical cavity flow
Erturk, Ercan; Allahviranloo, Tofigh (MDPI, 2022)In this paper, bifurcations in the solution of the Navier-Stokes equations are studied and multiple solutions of the driven semi-elliptical cavity flow are presented. The two-dimensional steady incompressible driven viscous ... -
Classical and intelligent methods in model extraction and stabilization of a dual-axis 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 open-loop unstable systems is challenging. In this study, first, both nonlinear and linear models of a dual-axis reaction wheel pendulum (DA-RWP) are extracted by employing Lagrangian equations ... -
A computational method for nonlinear Burgers’ equation using quartic-trigonometric tension B-splines
Yigit, Gulsemay; Hepson, Ozlem Ersoy; Allahviranloo, Tofigh (Springer Medizin, 2022)This work proposes a finite element method emphasizing with quartic-trigonometric 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 integro-differential equation with variable coefficients
Li, Chenkuan; Saadati, Reza; Allahviranloo, Tofigh (WILEY, 2022)Using Babenko's approach, multivariate Mittag-Leffler (MM-L) function, and Krasnoselskii's fixed point theorem, we first investigate the existence of solutions to a Liouville-Caputo nonlinear integro-differential equation ... -
An efficient numerical method for solving m-polar 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 time-fractional 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 time-fractional modified nonlinear Schrödinger equation (CTFMNLSE), and finally, ... -
Existence, uniqueness and matrix-valued fuzzy mittag–leffler–hypergeometric–wright stability for p -hilfer fractional differential equations in matrix-valued 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 matrix-valued fuzzy Mittag–Leffler–Hypergeometric–Wright stability. Then, we apply Radu–Mihet method derived from an alternative fixed point ... -
Finite-time stability of mild solution to time-delay 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 finite-time delay is investigated. We firstly introduce the concept of Mittag-Leffler ... -
Fuzzy control problem via random multi-valued equations in symmetric F-n-NLS
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 F-n-NLS 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; Rostamy-Malkhalifeh, 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; Rostamy-Malkhalifeh, 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 decision-making units. In general, in cross efficiency evaluation models, it is assumed that decision ... -
Introducing a trapezoidal interval type-2 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, decision-making, 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 two-sided 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 lead-lag 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 lead-lag 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 ...
