Results 1 to 10 of about 195 (132)

Methods of variance component estimation

open access: yesCzech Journal of Animal Science, 2006
Estimation of variance components is a method often used in population genetics and applied in animal breeding. Even experienced population geneticists nowadays feel lost if confronted with the huge set of different methods of variance component ...
D. Rasch, O. Mašata
doaj   +1 more source

ACCURACY ANALYSIS OF HRSI-BASED GEOPOSITIONING USING LEAST SQUARES COLLOCATION [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2012
Rational function model with bias compensation has been widely used in geopositioning of High Resolution Satellite Imagery (HRSI). We studied the geopositioning issue using a pair of QuickBird imagery in the Shanghai urban area with 126 Control Points (
Y. Shen   +7 more
doaj   +1 more source

The Impact of Noise in a GRACE/GOCE Global Gravity Model on a Local Quasi‐Geoid

open access: yesJournal of Geophysical Research: Solid Earth, Volume 124, Issue 3, Page 3219-3237, March 2019., 2019
Abstract We present a local quasi‐geoid (QG) model which combines a satellite‐only global gravity model with local data sets using weighted least squares. The QG is computed for an area comprising the Netherlands, Belgium, and the southern North Sea. It uses a two‐scale spherical radial basis function model complemented by bias parameters to account ...
Cornelis Slobbe   +6 more
wiley   +1 more source

A Robust Method for GPS/BDS Pseudorange Differential Positioning Based on the Helmert Variance Component Estimation

open access: yesJournal of Sensors, Volume 2017, Issue 1, 2017., 2017
The use of global navigation satellite system (GNSS) is entering a new era of joint positioning based on the use of multifrequencies and multimodes. Ensuring the correct weighting of observations from each system and satellite has become a key problem during real‐time positioning. This paper addresses the issue of weights of observations as well as the
Jian Deng   +4 more
wiley   +1 more source

Analysis of epistasis: A genetic model for triploid endosperm traits

open access: yes浙江大学学报. 农业与生命科学版, 2007
A genetic model for triploid endosperm traits was proposed on the basis of diallel cross system to analyze additive by additive epistasis of direct effect (AA) and maternal effect (AmAm) along with direct additive effect, dominance effect, cytoplasm ...
CHENG Jun-qi   +3 more
doaj   +1 more source

Analysis of Combined Experiments Revisited

open access: yesAgronomy Journal, Volume 107, Issue 2, Page 763-771, March–April 2015., 2015
Agronomic experiments are often replicated over time and space to evaluate how treatments perform across a range of environments. The analysis of experiments conducted for more than one growing season (years) and/or places (locations) is commonly referred to as analysis of combined experiments.
Kenneth J. Moore, Philip M. Dixon
wiley   +1 more source

Computation of variance components by the MINQUE method

open access: yesJournal of Multivariate Analysis, 1986
We present a new method of computing C. R. Rao's MINQUE in variance component models \((y=X\beta +U_ 1\xi_ 1+\cdots +U_ p\xi_ p)\), which requires only inversion and storage of \(n_ i\times n_ i\) matrices, where \(n_ i\) is the number of columns in \(U_ i\). In many cases most of these matrices are of diagonal form.
Kleffe, J, Seifert, B
openaire   +2 more sources

A Strategy for Finding the Optimal Scale of Plant Core Collection Based on Monte Carlo Simulation

open access: yesThe Scientific World Journal, Volume 2014, Issue 1, 2014., 2014
Core collection is an ideal resource for genome‐wide association studies (GWAS). A subcore collection is a subset of a core collection. A strategy was proposed for finding the optimal sampling percentage on plant subcore collection based on Monte Carlo simulation.
Jiancheng Wang   +8 more
wiley   +1 more source

Criterion for comparing the variance component estimation methods used for adjusting horizontal control networks

open access: yesGeodesy and Cartography, 2012
Determination of which stochastic model taken in hand for this study is suitable under conditions, when comparing stochastic models, used for adjusting horizontal control networks, is the aim of this study.
Erol Yavuz, Orhan Baykal
doaj   +1 more source

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