Hierarchical Design-Based Estimation in Stratified Multipurpose Surveys Estimación jerárquica basada en el diseño muestral para encuestas estratificadas multi-propósito

Autor: HANWEN ZHANG, HUGO ANDRÉS GUTIÉRREZ

Publikováno v: Revista Colombiana de Estadística, Vol 34, Iss 3, Pp 403-420 (2011)

This paper considers the joint estimation of population totals for different variables of interest in multi-purpose surveys using stratified sampling designs. When the finite population has a hierarchical structure, different methods of unbiased esti

Externí odkaz: https://doaj.org/article/530e15c668e4468abdb737d7de23f2a1

Estimation of the Population Total using the Generalized Difference Estimator and Wilcoxon Ranks

Autor: HUGO ANDRÉS GUTIÉRREZ, F. JAY BREIDT

Publikováno v: Revista Colombiana de Estadística, Vol 32, Iss 1, Pp 123-143 (2009)

This paper presents a new regression estimator for the total of a population created by means of the minimization of a measure of dispersion and the use of the Wilcoxon scores. The use of a particular nonparametric model is considered in order to obt

Externí odkaz: https://doaj.org/article/cec09f741a244b53ac04b1df63d82bc6

Morphologic and morphometric aspects of the domestic geese trachea

Autor: Carla Cristina Ferrari, Cheston Cesar Honorato Pereira, Miryan Lança Vilia Alberto, Hugo Andrés Gutiérrez Trujillo, Tatiana Carlesso Santos, Anita Menconi, Pedro Primo Bombonatto

Publikováno v: Biotemas, Vol 21, Iss 2, Pp 91-96 (2008)

The tracheal morphology of 31 domestic geese was studied in order to characterize the morphometric and macroscopic aspects. Domestic geese, adult, male and female, from regular breeders, were utilized. The animals were euthanized by chloroform inhala

Externí odkaz: https://doaj.org/article/9d893832d3794032882a6421de01207a

Formação e desenvolvimento dos membros de embriões e fetos bovinos

Autor: Hugo Andrés Gutiérrez Trujillo

Publikováno v: Biblioteca Digital de Teses e Dissertações da USPUniversidade de São PauloUSP.

O período embrionário apresenta maior susceptibilidade a teratógenos, sendo a fase que as primitivas camadas germinativas e rudimento dos órgãos são formados. Cada órgão tem uma fase crítica de desenvolvimento e os processos bioquímicos env

Externí odkaz: http://www.teses.usp.br/teses/disponiveis/10/10132/tde-13022008-160147/

The Performance of Multivariate Calibration on Ratios, Means and Proportions

Autor: Nelson Andrés Rodríguez, Hugo Andrés Gutiérrez Rojas, Hanwen Zhang

Publikováno v: Revista Colombiana de Estadística, Vol 39, Iss 2, Pp 281-305 (2016)
Repositorio UN
Universidad Nacional de Colombia
instacron:Universidad Nacional de Colombia

In this paper, the calibration approach is revisited in order to allow newcalibration weights that are subject to the restriction of multiple calibration equations on a vector of ratios, means and proportions. The classical approach is extended in su

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c64ca918ead4f16664b6e4ca6abcde0f
http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-17512016000200008&lng=en&tlng=en