Mathematics, Statistics & Physics: المرسلات الحديثة
السجلات المعروضة 681 -- 700 من 740
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Outlier robust nonlinear mixed model estimation
( John Wiley & Sons, Ltd. , 2015 , Article)In standard analyses of data well-modeled by a nonlinear mixed model, an aberrant observation, either within a cluster, or an entire cluster itself, can greatly distort parameter estimates and subsequent standard errors. ... -
Regression estimator under inverse sampling to estimate arsenic contamination
( John Wiley & Sons, Ltd , 2011 , Article)The fate of arsenic introduced to the environment as a result of the natural and human activities is an important issue. Surveys of arsenic typically involve sampling from a large area. Measuring arsenic concentrations in ... -
Overlapping Schwarz waveform relaxation method for the solution of the convection-diffusion equation
( John Wiley & Sons, Ltd. , 2008 , Article)In this article we study the convergence of the overlapping Schwarz wave form relaxation method for solving the convection-diffusion equation over multi-overlapped subdomains. It is shown that the method converges linearly ... -
Inverse Adaptive Cluster Sampling with Unequal Selection Probabilities: Case Studies on Crab Holes and Arsenic Pollution
( Wiley Publishing Asia Pty Ltd. , 2015 , Article)Adaptive cluster sampling is an efficient method of estimating the parameters of rare and clustered populations. The method mimics how biologists would like to collect data in the field by targeting survey effort to localised ... -
Asymptotic formulae for eigenvalues and eigenfunctions of q-Sturm-Liouville problems
( WILEY-VCH Verlag , 2011 , Article)We investigate the asymptotic behavior of the eigenvalues and the eigenfunctions of q-Sturm-Liouville eigenvalue problems. For this aim we study the asymptotic behavior of q-trigonometric functions as well as fundamental ... -
Disability, depression and somatization in a low back pain population
( Blackwell Publishing Asia , 2006 , Article)Objective: The aim of this study was to determine the prevalence of low back pain (LBP) in a primary care setting population and examine its association with the symptoms of depression and somatization. Methods: This ... -
Is hypertension a predictor for heart failure? A cross cultural comparison over a 10-year period
( Elsevier B.V. , 2005 , Article)This was a retrospective cohort study to assess the effect of hypertension (HTN) among Qatari and Asian patients admitted to the Hamad General Hospital in Qatar with heart failure (HF) and to identify risk factors that ... -
The Structure of the Free Volume in Poly(styrene-co-acrylonitrile) from Positron Lifetime and Pressure Volume Temperature (PVT) Experiments
( WILEY-VCH Verlag , 2004 , Article)Summary: The structure of the free volume and its temperature dependence between 25 and 190 °C of copolymers of styrene with acrylonitrile, SAN (0 to 50 mol-% AN), is studied by pressure volume temperature (PVT) experiments ... -
Adaptive Sampling
( John Wiley & Sons, Ltd , 2015 , Book chapter)Animal populations are often highly grouped. For example, fish can form large, widely scattered schools with few fish in between. Even rare species of animals may form small groups that are hard to find. Applying standard ... -
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 ... -
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 ... -
An upper bound of the basis number of the semi-strong product of cycles with bipartite graphs
( The Korean Mathematical Society , 2007 , Article)An upper bound of the basis number of the semi-strong product of cycles with bipartite graphs is given. Also, an example is presented where the bound is achieved. -
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. -
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 ... -
Weighted estimates for rough parametric Marcinkiewicz integrals
( Korean Mathematical Society , 2007 , Article)We establish a weighted norm inequality for a class of rough parametric Marcinkiewicz integral operators . As an application of this inequality, we obtain weighted inequalities for a class of parametric Marcinkiewicz ... -
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 ... -
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 ... -
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]). -
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 ... -
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 ...
