Results 31 to 40 of about 817,120 (303)

The Variance Composition of Firm Growth Rates [PDF]

BAR: Brazilian Administration Review, 2009
Firms exhibit a wide variability in growth rates. This can be seen as another manifestation of the fact that firms are different from one another in several respects.
Luiz Artur Ledur Brito, Flávio Carvalho de Vasconcelos   +1 more
doaj  

Kriging with Unknown Variance Components for Regional Ionospheric Reconstruction

Sensors, 2017
Ionospheric delay effect is a critical issue that limits the accuracy of precise Global Navigation Satellite System (GNSS) positioning and navigation for single-frequency users, especially in mid- and low-latitude regions where variations in the ...
Ling Huang, Hongping Zhang, Peiliang Xu, Jianghui Geng, Cheng Wang, Jingnan Liu   +5 more
doaj   +1 more source

Prediction of breeding values and selection responses with genetic heterogeneity of environmental variance [PDF]

, 2007
There is empirical evidence that genotypes differ not only in mean, but also in environmental variance of the traits they affect. Genetic heterogeneity of environmental variance may indicate genetic differences in environmental sensitivity.
Mulder, H. A., H. A. Mulder, W. G. Hill, Mulder, H.A., Hill, W. G., Bijma, P., Hill, W.G., P. Bijma   +7 more
core   +1 more source

Variance components of invasion. [PDF]

, 2020
Variance components of invasion.
Kevin J. Cheung (8339253), Veena Padmanaban (8339247), Joel S. Bader (205554), Yohannes Tsehay (8339250), Andrew J. Ewald (8339256)   +4 more
core   +1 more source

Iteratively Reweighted Least Squares Fiducial Interval for Variance in Unbalanced Variance Components Model

Mathematics
The objective of this work is to propose the iteratively reweighted least squares concept to form a fiducial generalized pivotal quantity of the between-group variance component for the unbalanced variance components model.
Arisa Jiratampradab, Jiraphan Suntornchost, Thidaporn Supapakorn   +2 more
doaj   +1 more source

Likelihood inference for small variance components [PDF]

, 2000
In this paper, we develop likelihood-based methods for making inferences about the components of variance in a general normal mixed linear model. In particular, we use local asymptotic approximations to construct confidence intervals for the components ...
Stern, S.E., Welsh, A.H.
core  

Bayes unbiased estimation in a model with two variance components [PDF]

, 1987
summary:In the paper an explicit expression for the Bayes invariant quadratic unbiased estimate of the linear function of the variance components is presented for the mixed linear model $\bold{t=X\beta+\epsilon}$, $\bold{E(t)=X\beta}$, $\bold{D(t)=0_1U_1+
Stuchlý, Jaroslav
core   +1 more source

A Bibliometric Analysis of Publications in Uremic Toxins From 1991 to 2024

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background Uremic toxins are a growing area of research in nephrology, with significant implications in the progression and treatment of chronic kidney disease (CKD) and the management of end‐stage kidney disease (ESKD). This bibliometric analysis aims to evaluate the global research trends, key contributors, and the impact of publications in ...
Yuh‐Shan Ho, Karim M. Soliman, Wisit Cheungpasitporn, Wannasit Wathanavasin, Ahmed Daoud, Ahmed I. Kamal, Balázs Szamosfalvi, Tibor Fülöp   +7 more
wiley   +1 more source

Genetic Parameters and Trait Associations in Wheat Under Drought and Low Nitrogen Conditions

Nitrogen
Drought and low nitrogen stress are the leading cause of low crop production and productivity worldwide. Developing drought-tolerant wheat germplasm resilient to low nitrogen conditions is essential through genetic enhancement and selection for novel ...
Sbongeleni Warren Duma, Hussein Shimelis, Seltene Abady Tesfamariam, Toi John Tsilo   +3 more
doaj   +1 more source

Estimating variance components in Stata [PDF]

, 2017
This article gives a brief overview of the popular methods for estimating variance components in linear models and describes several ways to obtain such estimates in Stata for various experimental designs.
Marchenko, Yulia V.
core   +1 more source