Yazar "Ogrekci, Suleyman" için listeleme
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A comparative study of vision transformers and convolutional neural networks: sugarcane leaf diseases identification
Ogrekci, Suleyman; Unal, Yavuz; Dudak, Muhammet Nuri (Springer, 2023)Diseases in agricultural products cause significant decrease on harvest efficiency and economic values of the products, early detection of diseases can prevent this loss. The development of artificial intelligence has ... -
A fixed point method for stability of nonlinear volterra integral equations in the sense of Ulam
Ogrekci, Suleyman; Basci, Yasemin; Misir, Adil (Wiley, 2023)In this paper, we investigate the Hyers-Ulam and Hyers-Ulam-Rassias stability of solutions of a general class of nonlinear Volterra integral equations. By applying a fixed point theorem and modifying a technique widely ... -
FRACTIONAL VARIATIONAL PROBLEMS ON CONFORMABLE CALCULUS
Ogrekci, Suleyman; Asliyuce, Serkan (Ankara Univ, Fac Sci, 2021)In this paper, we deal with the variational problems defined by an integral that include fractional conformable derivative. We obtained the optimality results for variational problems with fixed end-point boundary conditions ... -
Generalized Taylor Series Method for Solving Nonlinear Fractional Differential Equations with Modified Riemann-Liouville Derivative
Ogrekci, Suleyman (HINDAWI PUBLISHING CORP, 2015)We propose an efficient analytic method for solving nonlinear differential equations of fractional order. The fractional derivative is defined in the sense of modified Riemann-Liouville derivative. A new technique for ... -
Interval oscillation criteria for functional differential equations of fractional order
Ogrekci, Suleyman (SPRINGEROPEN, 2015)In this paper, we are concerned with the oscillatory behavior of a class of fractional differential equations with functional terms. The fractional derivative is defined in the sense of themodified Riemann-Liouville ... -
INTERVAL OSCILLATION CRITERIA FOR SECOND-ORDER FUNCTIONAL DIFFERENTIAL EQUATIONS
Ogrekci, Suleyman (YILDIZ TECHNICAL UNIV, 2018)This paper concerns the oscillation problem of a general class of second-order differential equations. New interval oscillation criteria for a class of second-order functional nonlinear differential equations with damping ... -
New interval oscillation criteria for second-order functional differential equations with nonlinear damping
Ogrekci, Suleyman (DE GRUYTER OPEN LTD, 2015)This paper concerns the oscillation problem of second-order nonlinear damped ODE with functional terms. We give some new interval oscillation criteria which is not only based on constructing a lower solution of a Riccati ... -
On Approximate Solution of First-Order Weakly-Singular Volterra Integro-Dynamic Equation on Time Scales
Misir, Adil; Ogrekci, Suleyman (GAZI UNIV, 2015)Many mathematical formulations of physical phenomena contain integro-dynamic equations. In this paper, we present a new and simple approach to resolve linear weakly-singular Volterra integro-dynamic equations of first-order ... -
On Hyers-Ulam-Rassias stability of fractional differential equations with Caputo derivative
El-hady, El-sayed; Ogrekci, Suleyman (Journal Mathematics & Computer Science-Jmcs, 2021)In this article, we study the stability problem of some fractional differential equations in the sense of Hyers-Ulam and Hyers-Ulam-Rassias based on some fixed point techniques. In this way, we improve and generalize some ... -
ON THE HYERS-ULAM STABILITY OF DELAY DIFFERENTIAL EQUATIONS
Ogrekci, Suleyman; Basci, Yasemin; Misir, Adil (Georgian Natl Acad Sciences, 2022)In this paper, we consider the stability problem of delay differential equations in the sense of Hyers-Ulam and Hyers-Ulam-Rassias. By using a well known fixed point alternative on generalized complete metric spaces, we ... -
ON THE OSCILLATION OF SECOND-ORDER NONLINEAR DIFFERENTIAL EQUATIONS WITH DAMPING
Ogrekci, Suleyman; Misir, Adil; Tiryaki, Aydin (UNIV MISKOLC INST MATH, 2017)In this paper, we are concerned with the oscillations in forced second order nonlinear differential equations with nonlinear damping terms. By using clasical variational principle and averaging technique, new oscillation ... -
Oscillation Criteria for a Class of Second Order Nonlinear Differential Equations
Misir, Adil; Ogrekci, Suleyman (GAZI UNIV, 2016)In this paper, we are concerned with the oscillation of a class of second order nonlinear differential equations. By using the Riccati technique some new oscillation criteria are established, therefore, we generalize and ... -
Oscillation of fractional order functional differential equations with nonlinear damping
Bayram, Mustafa; Adiguzel, Hakan; Ogrekci, Suleyman (SCIENDO, 2015)In this paper, we are concerned with the oscillatory behavior of a class of fractional differential equations with functional terms. The fractional derivative is defined in the sense of the modified Riemann-Liouville ... -
Oscillation Theorems for Second-Order Nonlinear Differential Equations
Misir, Adil; Ogrekci, Suleyman (GAZI UNIV, 2016)In this paper, we are concerned with the oscillations in forced second order nonlinear differential equations with nonlinear damping terms. By using clasical variational principle and averaging technique, new oscillation ...