Başlık için Cilt:69 Sayı:01 (2020) listeleme
Toplam kayıt 68, listelenen: 1-20
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A comparative study of classifiers for early diagnosis of gestational Diabetes Mellitus
(Ankara Üniversitesi Fen Fakültesi, 2020-06-30)Gestational Diabetes Mellitus (GDM), usually found deploying a medical test called the Oral Glucose Tolerance Test (OGTT), is a prevalent complication during pregnancy. Early detection of GDM and identifying the most ... -
A comparison of different methods of estimation for the flexible Weibull distribution
(Ankara Üniversitesi Fen Fakültesi, 2020-06-30)This article presents different parameter estimation methods for flexible Weibull distribution introduced by Bebbington et al. (Reliability Engineering and System Safety 92:719-726, 2007), which is a modified version of ... -
A generalized nonlinear iterative algorithm for the explicit midpoint rule of nonexpansive semigroup
(Ankara Üniversitesi Fen Fakültesi, 2020-06-30)In this paper, we introduce a new iterative midpoint rule for finding a solution of xed point problem for a nonexpansive semigroup in real Hilbert spaces. We establish a strong convergence theorem for the sequences generated ... -
A new family of lifetime distributions in terms of cumulative hazard rate function
(Ankara Üniversitesi Fen Fakültesi, 2020-06-30)In the present paper, a new family of lifetime distributions is introduced according to cumulative hazard rate function, the well-known concept in survival analysis and reliability engineering. Some important properties ... -
A note on hyperbolic (p,q)-Fibonacci quaternions
(Ankara Üniversitesi Fen Fakültesi, 2020-06-30)In this paper, we introduce a new quaternion sequence called hyperbolic (p,q)-Fibonacci quaternions. This new quaternion sequence includes hyperbolic Fibonacci, hyperbolic k-Fibonacci, hyperbolic Pell, hyperbolic k-Pell, ... -
A space-time discontinuous Galerkin method for linear hyperbolic PDE's with high frequencies
(Ankara Üniversitesi Fen Fakültesi, 2020-06-30)The main purpose of this paper is to describe a space-time discontinuous Galerin (DG) method based on an extended space-time approximation space for the linear first order hyperbolic equation that contains a high frequency ... -
A study on comparisons of Bayesian and classical parameter estimation methods for the two-parameter Weibull distribution
(Ankara Üniversitesi Fen Fakültesi, 2020-06-30)The main objective of this paper is to determine the best estimators of the shape and scale parameters of the two parameter Weibull distribution. Therefore, both classical and Bayesian approximation methods are considered. ... -
A Tychonoff theorem for graded ditopological texture spaces
(Ankara Üniversitesi Fen Fakültesi, 2020-06-30)In this paper, initial and product graded ditopologies are formulated and accordingly it is shown that d f G D i t o p is topological over d f T e x × d f T e x . By means of spectrum idea, (di)compactness ... -
Alternative partner curves in the Euclidean 3-space
(Ankara Üniversitesi Fen Fakültesi, 2020-06-30)In the present paper, a new type of special curve couple which are called WC^{∗}-partner curves are introduced according to alternative moving frame {N,C,W}. The distance function between the corresponding points of reference ... -
An evaluation of some methods used for determination of homogenous structural break point in mean of panel data
(Ankara Üniversitesi Fen Fakültesi, 2020-06-30)In this study, performances of correct break point estimation of Simple Mean Shift Model Method, Fluctuation Test, Wald Statistic Test and Kim Test methods used to investigate presence of structural break and determine the ... -
Analysis of joint reliability importance in linear m-consecutive-k,l -out-of-n:F system
(Ankara Üniversitesi Fen Fakültesi, 2020-06-30)Combinatorial techniques have an important role to compute the joint reliability importance (JRI) of some coherent systems. We obtain combinatorial formula for calculation of the JRI of two components in a generalized ... -
Analysis of the Rayleigh wave field due to a tangential load applied on the surface of a coated elastic half-space
(Ankara Üniversitesi Fen Fakültesi, 2020-06-30)The paper deals with 3D dynamic response of a coated elastic half space subject to in-plane surface loading. The problem is formulated by a pair of elliptic equations over the interior and a two dimensional singularly ... -
Approximate test for testing a null variance ratio in the Unbalanced One-Way Random Model
(Ankara Üniversitesi Fen Fakültesi, 2020-06-30)The approximate test for testing the signicance of the random effect is presented in the unbalanced one-way random model in which both random effects and errors are from non-normal universes. The test is based on the ... -
Approximation by sampling type discrete operators
(Ankara Üniversitesi Fen Fakültesi, 2020-06-30)In this paper, we deal with discrete operators of sampling type. It is known that this type of operators are related to generalized sampling series and they have important applications. In this work, using bounded and ... -
Asymptotic behaviour of resonance eigenvalues of the Schrödinger operator with a matrix potential
(Ankara Üniversitesi Fen Fakültesi, 2020-06-30)We will discuss the asymptotic behaviour of the eigenvalues of a Schrödinger operator with a matrix potential defined by the Neumann boundary condition in L₂^{m}(F), where F is a d-dimensional rectangle and the potential ... -
Classical and strongly classical 2-absorbing second submodules
(Ankara Üniversitesi Fen Fakültesi, 2020-06-30)In this paper, we will introduce the concept of classical (resp. strongly classical) 2-absorbing second submodules of modules over a commutative ring as a generalization of 2-absorbing (resp. strongly 2-absorbing) ... -
Compactness and stability in diframes
(Ankara Üniversitesi Fen Fakültesi, 2020-06-30)The concept of diframe was introduced as a generalization of ditopological texture spaces. The purpose of this paper is to present the results of a study on the concepts of compactness and stability in the setting of ... -
Confidence regions for bivariate probability density functions using polygonal areas
(Ankara Üniversitesi Fen Fakültesi, 2020-06-30)In this study, a polygonal approach is suggested to generalize the notion of the condence region of the univariate probability density function for the bivariate probability density function. The equal density approach ... -
Curves and ruled surfaces according to alternative frame in dual space
(Ankara Üniversitesi Fen Fakültesi, 2020-06-30)In this paper, the vectorial moments of the alternative vectors are expressed in terms of alternative frame. According to the new versions of these vectorial moments, the parametric equations of the closed ruled surfaces ... -
Decomposition of soft continuity via soft locally b-closed set
(Ankara Üniversitesi Fen Fakültesi, 2020-06-30)In this paper, we introduce soft locally b-closed sets in soft topological spaces which are defined over an initial universe with a fixed set of parameters and study some of their properties. We investigate their relationships ...