تصفح Mathematics, Statistics & Physics حسب تاريخ النشر
السجلات المعروضة 41 -- 60 من 715
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A rich learning lesson using the Poisson distribution
( Elsevier B.V. , 2007 , Article)In this note, we explore the rich information about inference that the Poisson distribution has. The source of this information is mainly the fact that the mean and variance of this distribution are equal. -
A simple method for finding empirical likelihood type intervals for the ROC curve
( Wayne State University , 2007 , Article)Interval estimation of the ROC curve is considered using the empirical likelihood techniques. Suggested is a procedure that is very simple computationally and avoids the constrained optimization problems usually faced with ... -
Homotopy perturbation method for nonlinear partial differential equations of fractional order
( Elsevier B.V. , 2007 , Article)The aim of this Letter is to present an efficient and reliable treatment of the homotopy perturbation method (HPM) for nonlinear partial differential equations with fractional time derivative. The fractional derivative is ... -
Positron annihilation and ion beam analysis of ion-bombardment-induced hydrogen release and oxidation of ultra high molecular weight polyethylene
( Elsevier , 2007 , Article)Ultra high molecular weight polyethylene was bombarded with He+ and Ar+ ions to fluences ranging from 1013 to 2×1016 ions/cm2. Rutherford backscattering and nuclear reaction analysis were applied to study mechanism of ... -
A generalized differential transform method for linear partial differential equations of fractional order
( Elsevier B.V. , 2007 , Article)In this letter we develop a new generalization of the two-dimensional differential transform method that will extend the application of the method to linear partial differential equations with space- and time-fractional ... -
Application of generalized differential transform method to multi-order fractional differential equations
( Elsevier , 2007 , Article)In a recent paper [Odibat Z, Momani S, Erturk VS. Generalized differential transform method: application to differential equations of fractional order, Appl Math Comput. submitted for publication] the authors presented a ... -
Numerical comparison of methods for solving a special fourth-order boundary value problem
( Elsevier Inc. , 2007 , Article)In this paper, we implement relatively new analytical techniques, the differential transform method, Adomian decomposition, and homotopy perturbation method, for solving a fourth-order boundary value problem. In these ... -
Solving systems of fractional differential equations using differential transform method
( Elsevier B.V. , 2007 , Article)This paper presents approximate analytical solutions for systems of fractional differential equations using the differential transform method. The fractional derivatives are described in the Caputo sense. The application ... -
Solving fractional diffusion and wave equations by modified homotopy perturbation method
( Elsevier B.V. , 2007 , Article)This Letter applies the modified He's homotopy perturbation method (HPM) suggested by Momani and Odibat to obtaining solutions of linear and nonlinear fractional diffusion and wave equations. The fractional derivative is ... -
On multistage ranked set sampling for distribution and median estimation
( Elsevier B.V. , 2007 , Article)A variation of ranked set sampling (RSS), multistage RSS (MSRSS), is investigated for the estimation of the distribution function and some of its quantiles, in particular the median. It is shown that this method is ... -
Preparation, spectroscopic and structural studies on charge-transfer complexes of 2,9-dimethyl-1,10-phenanthroline with some electron acceptors
( Elsevier , 2007 , Article)Charge-transfer (CT) complexes formed in the reactions of 2,9-dimethyl-1,10-phenanthroline (Me2phen) with some acceptors such as chloranil (Chl), picric acid (HPA) and chloranilic acid (H2CA) have been studied in the defined ... -
Analytical approach to the Darcy–Lapwood–Brinkman equation
( Elsevier , 2007 , Article)Three exact solutions are obtained for flow through porous media, as governed by the Darcy–Lapwood–Brinkman model, for a given vorticity distribution. The resulting flow fields are identified as reversing flows; stagnation ... -
An adaptive Monte Carlo integration algorithm with general division approach
( Elsevier , 2007 , Article)We propose an adaptive Monte Carlo algorithm for estimating multidimensional integrals over a hyper-rectangular region. The algorithm uses iteratively the idea of separating the domain of integration into 2ssubregions. The ... -
Sinc-based computations of eigenvalues of Dirac systems
( Springer Netherlands , 2007 , Article)The celebrated classical sampling theorem is used to compute approximate values of the eigenvalues of Dirac systems with eigenvalue parameter in the boundary conditions. We deal with problems with an eigenparameter in one ... -
The multistage homotopy-perturbation method: A powerful scheme for handling the Lorenz system
( Elsevier , 2007 , Article)In this paper, a new reliable algorithm based on an adaptation of the standard homotopy-perturbation method (HPM) is presented. The HPM is treated as an algorithm in a sequence of intervals (i.e. time step) for finding ... -
Homotopy analysis method for fractional IVPs
( Elsevier , 2007 , Article)In this paper, the homotopy analysis method is applied to solve linear and nonlinear fractional initial-value problems (fIVPs). The fractional derivatives are described by Caputo’s sense. Exact and/or approximate analytical ... -
Convergence theorems for nonself asymptotically nonexpansive mappings
( Elsevier B.V. , 2007 , Article)In this paper, we prove some strong and weak convergence theorems using a modified iterative process for nonself asymptotically nonexpansive mappings in a uniformly convex Banach space. This will improve and generalize the ... -
Alternative method of diffraction-enhanced imaging
( Elsevier B.V. , 2007 , Article)Diffraction-enhanced imaging (DEI) is a radiographic technique that derives contrast from an object's X-ray absorption, refraction gradient and small-angle scatter properties (extinction). The DEI imaging system prepares ... -
Likelihood and Bayesian estimation of using lower record values from the generalized exponential distribution
( Elsevier Ltd , 2007 , Article)We consider the likelihood and Bayesian estimation of the stress-strength reliability based on lower record values from the generalized exponential distribution. The estimators are derived and their properties are studied. ... -
On the Lp boundedness of rough parametric Marcinkiewicz functions
( Victoria University , 2007 , Article)In this paper, we study the Lp boundedness of a class of parametric Marcinkiewicz integral operators with rough kernels in L(log + L)(Sn-1). Our result in this paper solves an open problem left by the authors of ([6]).