Results 101 to 110 of about 789 (216)
Statistics in Medicine, Volume 45, Issue 13-14, June 2026.ABSTRACT Composite endpoints that combine recurrent non‐fatal events with a terminal event are increasingly used in randomized clinical trials, yet conventional time‐to‐first event analyses may obscure clinically relevant information. We compared two statistical frameworks tailored to such endpoints: the joint frailty model (JFM) and the last‐event ...
Adrien Orué +4 more
wiley +1 more source
Statistics in Medicine, Volume 45, Issue 13-14, June 2026.ABSTRACT With the development of modern technology, richer and more intensive longitudinal data are available for researchers to study more complex model structures. The Mixed‐Effect Location‐Scale Model (MELS) is useful for modeling the variance components in such data.
Brian Ping‐Huan Wu, Donald Hedeker
wiley +1 more source
On the error of parameter-dependent compound quadrature formulas
, 1993 Ehrenmark (this journal, 1988) and Vanden Berghe et al. (this journal, 1990) introduced quadrature formulas of a compound type, which are obtained by interpolation with the null space of the linear differential operator Drf + λ2iDr-2f, where λi may be ...
Köhler, Peter
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Averaged quadrature formulas and vatiants with applications [PDF]
, 2019 Numeriqka integracija prouqava kako se moe izraqunati brojevna vrednost integrala. Formule numeriqke integracije nazivaju se kvadraturama. Jedinstvena optimalna interpolaciona kvadratura sa n qvorova jeste Gausova formula Gn, koja ima algebarski stepen
Tomanović, Jelena
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Optimal quadrature formulas with derivatives in Sobolev space
, 2014 In the present paper the problem of construction of optimal quadrature formulas in the sense of Sard in the space $L_2^{(m)}(0,1)$is considered. Here the quadrature sum consists of values of the integrand at nodes and values of the first and the third derivatives of the integrand at the end points of the integration interval.
Shadimetov, Kh. M. +2 more
openaire +2 more sources
Grain Size Sorting and Steady Bars Formation in Straight Channels—Part 1: Laboratory Experiments
Journal of Geophysical Research: Earth Surface, Volume 131, Issue 6, June 2026.Abstract Surface grain size in gravel‐bed rivers is inherently heterogeneous, with marked spatial variability that remains challenging to predict, even in the presence of regular bedforms. This study investigates surface grain size variability on self‐formed alternate bars at the scale of a single bar unit, and is divided in two parts.
Marco Redolfi +3 more
wiley +1 more source
Journal of Advances in Modeling Earth Systems, Volume 18, Issue 6, June 2026.Abstract The ultraviolet (UV) and visible spectral regions account for about half of the solar incoming energy, making the accurate treatment of ozone, oxygen and water vapor and Rayleigh scattering in this region crucial for understanding solar radiation modulation through absorption and scattering.
Jiangnan Li, Robin J. Hogan
wiley +1 more source
A Stable and Accurate X‐FFT Solver for Linear Elastic Homogenization Problems in 3D
International Journal for Numerical Methods in Engineering, Volume 127, Issue 10, 30 May 2026.ABSTRACT Although FFT‐based methods are renowned for their numerical efficiency and stability, traditional discretizations fail to capture material interfaces that are not aligned with the grid, resulting in suboptimal accuracy. To address this issue, the work at hand introduces a novel FFT‐based solver that achieves interface‐conforming accuracy for ...
Flavia Gehrig, Matti Schneider
wiley +1 more source
Quadrature formulas for calculating the hadamard integral of a special form [PDF]
, 2016 © 2016, International Journal of Pharmacy and Technology. All rights reserved.Currently, the issues related to finding solutions to some economic problems, such as problems pertaining to the queuing systems are of great interest. These problems, in turn,
Galimyanov A. +3 more
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