Mathematics, Statistics & Physics: المرسلات الحديثة
السجلات المعروضة 741 -- 760 من 781
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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 ... -
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 ... -
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 ... -
Standard numerical schemes for coupled parallel flow over porous layers
( Elsevier , 2007 , Article)In this work, we develop finite difference schemes of various orders of accuracy that are suitable for the simulation of flow through and over porous layers. The flow through the porous layer is assumed to be governed by ... -
Numerical methods for nonlinear partial differential equations of fractional order
( Elsevier B.V. , 2008 , Article)In this article, we implement relatively new analytical techniques, the variational iteration method and the Adomian decomposition method, for solving nonlinear partial differential equations of fractional order. The ... -
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 ... -
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 ... -
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 ... -
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. -
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. ... -
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 ... -
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 ... -
On the numerical simulation of population dynamics with density-dependent migrations and the Allee effects
( IOP Publishing , 2008 , Article)In this paper, the variational iteration method (VIM) and the Adomian decomposition method (ADM) are presented for the numerical simulation of the population dynamics model with density-dependent migrations and the Allee ... -
One and two sample confidence intervals for estimating the mean of skewed populations: an empirical comparative study
( TAYLOR & FRANCIS LTD , 2009 , Article)In this paper we consider and propose some confidence intervals for estimating the mean or difference of means of skewed populations. We extend the median t interval to the two sample problem. Further, we suggest using the ... -
On the 'independence of trials-assumption' in geometric distribution
( Taylor & Francis, Ltd , 2008 , Article)In this note, it is shown through an example that the assumption of the independence of Bernoulli trials in the geometric experiment may unexpectedly not be satisfied. The example can serve as a suitable and useful classroom ... -
The modified homotopy perturbation method for solving strongly nonlinear oscillators
( Elsevier , 2009 , Article)In this paper we propose a reliable algorithm for the solution of nonlinear oscillators. Our algorithm is based upon the homotopy perturbation method (HPM), Laplace transforms, and Padé approximants. This modified homotopy ... -
A simulated annealing technique for multi-objective simulation optimization
( Elsevier , 2009 , Article)In this paper, we present a simulated annealing algorithm for solving multi-objective simulation optimization problems. The algorithm is based on the idea of simulated annealing with constant temperature, and uses a rule ... -
Application of homotopy-perturbation method to fractional IVPs
( Elsevier , 2008 , Article)Fractional initial-value problems (fIVPs) arise from many fields of physics and play a very important role in various branches of science and engineering. Finding accurate and efficient methods for solving fIVPs has become ... -
New tellurite glass: Optical properties
( Elsevier , 2008 , Article)The refractive index and UV spectra of the quaternary tellurite glass system of the form 80TeO2-5TiO2-(15 - x) WO3-xAnOm where AnOm is Nb2O5, Nd2O3 and Er2O3, x = 0.01, 1, 3 and 5 mol% for Nb2O5 and x = 0.01, 0.1, 1, 3, 5 ... -
A New One-Step Iterative Process for Common Fixed Points in Banach Spaces
( Hindawi Publishing Corporation , 2008 , Article)We introduce a new one-step iterative process and use it to approximate the common fixed points of two asymptotically nonexpansive mappings through some weak and strong convergence theorems. Our process is computationally ...
