Results 21 to 30 of about 716,617 (262)

Discriminant Functions with Covariance

The Annals of Mathematical Statistics, 1948
This paper discusses the extension of the discriminant function to the case where certain variates (called the covariance variates) are known to have the same means in all populations. Although such variates have no discriminating power by themselves, they may still be utilized in the discriminant function.
Cochran, W. G., Bliss, C. I.
openaire   +2 more sources

The application of covariation method to the analysis (comparable) of digital images in cartography

Geodesy and Cartography, 2012
The article discusses research on the identification (comparison) possibilities and accuracy analysis of digital images applying the theory of covariation method.
Jurgita Milieškaitė
doaj   +1 more source

Least Squares Collocation Alternative to Helmert’s Transformation with Hausbrandt’s Post – Transformation Correction

Reports on Geodesy and Geoinformatics, 2015
The paper presents a least squares collocation - based alternative to Helmert’s transformation with Hausbrandt’s post – transformation correction. The least squares collocation is used as an exact predictor i.e.
Ligas Marcin, Banasik Piotr
doaj   +1 more source

Homogeneidade e heterogeneidade de variância residual em modelos de regressão aleatória sobre o crescimento de caprinos Anglo-Nubianos Homogeneity and heterogeneity of residual variance in random regression models on growth trajectory of Nubian goats

Pesquisa Agropecuária Brasileira, 2008
O objetivo deste trabalho foi comparar modelos de regressão aleatória com diferentes estruturas de variâncias residuais, na estimação dos componentes de covariância e parâmetros genéticos de características de crescimento de caprinos.
José Ernandes Rufino de Sousa, Martinho de Almeida e Silva, José Lindenberg Rocha Sarmento, Wandrick Hauus de Sousa, Maria do Socorro Medeiros de Souza, Angela Beatriz Fridrich   +5 more
doaj   +1 more source

Analysis of code levelling rods calibration accuracy applying covariance functions

Geodesy and Cartography, 2012
An analysis of code levelling rods calibration accuracy applying covariance functions theory is presented. Images of the coded rods are treated by the Matlab 7 computer program.
Jonas Skeivalas, Eimuntas Paršeliūnas, Raimundas Putrimas, Dominykas Šlikas   +3 more
doaj   +1 more source

New Closed Form Estimators for the Beta Distribution

Mathematics, 2023
In this paper, we detail closed form estimators for beta distribution that are simpler than those proposed by Tamae, Irie and Kubokawa. The proposed estimators are shown to have smaller asymptotic variances and smaller asymptotic covariances compared to ...
Victor Mooto Nawa, Saralees Nadarajah
doaj   +1 more source

Physical properties of the Schur complement of local covariance matrices [PDF]

, 2007
General properties of global covariance matrices representing bipartite Gaussian states can be decomposed into properties of local covariance matrices and their Schur complements. We demonstrate that given a bipartite Gaussian state $\rho_{12}$ described
Eisert J Wolf M M, Horn R A, Kraus K, L F Haruna, M C de Oliveira, Ozorio de Almeida A M, Ozorio de Almeida A M, Ozorio de Almeida A M   +7 more
core   +2 more sources

Estimação de parâmetros genéticos para peso do nascimento aos 550 dias de idade para animais da raça Tabapuã utilizando-se modelos de regressão aleatória Genetic parameters for weights from birth to 550 days of age of Tabapuã cattle using random regression models

Revista Brasileira de Zootecnia, 2006
Foram utilizados 21.762 registros de peso do nascimento aos 550 dias de idade de 4.221 animais para estimativa das funções de covariância empregando modelos de regressão aleatória.
Laila Talarico Dias, Lucia Galvão de Albuquerque, Humberto Tonhati, Rodrigo de Almeida Teixeira   +3 more
doaj   +1 more source

An unbiased estimator for the ellipticity from image moments [PDF]

, 2017
An unbiased estimator for the ellipticity of an object in a noisy image is given in terms of the image moments. Three assumptions are made: i) the pixel noise is normally distributed, although with arbitrary covariance matrix, ii) the image moments are ...
Tessore, Nicolas
core   +2 more sources

The application of the covariance method analysing the digital images of land surface / Žemės dangos pokyčių nustatymas atliekant fotografinių vaizdų palyginimą kovariacijos metodu /

Geodesy and Cartography, 2011
Accuracy issues of identification possibilities and analyzing digital images of land surface are examined using a covariance method. Digital images received using remote access methods are treated by the computer programes developed in the Matlab 7 ...
Jurgita Milieškaitė
doaj   +1 more source