Covariance Function
Mostrando 1-12 de 49 artigos, teses e dissertações.
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1. Sexual Function and Quality of Life in a Cohort of Brazilian Users of Two Kind of Intrauterine Contraceptives
Resumo Objetivo Comparar a função sexual e a qualidade de vida (QV) entre usuárias de contraceptivos intrauterinos (dispositivo intrauterino com cobre [DIU-cobre] ou sistema intrauterino liberador de levonorgestrel [SIU-LNG 52 mg 20 μg/dia]. Métodos O presente estudo foi parte de um estudo de corte transversal. Mulheres com idades entre 18 e 49 anos
Rev. Bras. Ginecol. Obstet.. Publicado em: 19/06/2019
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2. Variabilidad de Baja Frecuencia de la Persistencia de la Temperatura en el Sudeste de Sudamérica
Abstract Eight reference stations in south-eastern South America are analysed to derive the auto-covariance and auto-correlations of maximum and minimum temperature. Through the analysis are observed oscillations of periods between 18 and 25 years in the series studied. These periodicities show changes over time, especially in the 1950-1970 period. The excep
Rev. bras. meteorol.. Publicado em: 2017-03
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3. Epistasis between COMT Val158Met and DRD3 Ser9Gly polymorphisms and cognitive function in schizophrenia: genetic influence on dopamine transmission
Objective:To assess the relationship between cognitive function, a proposed schizophrenia endophenotype, and two genetic polymorphisms related to dopamine function, catechol-O-methyl transferase (COMT) Val158Met and dopamine receptor 3 (DRD3) Ser9Gly.Methods:Fifty-eight outpatients with schizophrenia/schizoaffective disorder and 88 healthy controls underwent
Rev. Bras. Psiquiatr.. Publicado em: 2015-09
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4. Use of orthogonal functions in random regression models in describing genetic variance in Nellore cattle
A total of 204,912 records of birth weights up to 550 days of age, of 24,890 Nellore cattle, offspring of 375 sires and 16,917 dams from five herds in the state of Mato Grosso, Brazil, were used in order to describe the variability of the weight development by random regression models. The model evaluated as the most suitable used the covariance function of
R. Bras. Zootec.. Publicado em: 2013-04
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5. Genetic evaluation of European quails by random regression models
The objective of this study was to compare different random regression models, defined from different classes of heterogeneity of variance combined with different Legendre polynomial orders for the estimate of (co)variance of quails. The data came from 28,076 observations of 4,507 female meat quails of the LF1 lineage. Quail body weights were determined at b
R. Bras. Zootec.. Publicado em: 2012-09
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6. Estimação não paramétrica da função de covariância para dados funcionais agregados / Nonparametric estimation of the covariance function for aggregated functional data
O objetivo desta dissertação é desenvolver estimadores não paramétricos para a função de covariância de dados funcionais agregados, que consistem em combinações lineares de dados funcionais que não podem ser observados separadamente. Estes métodos devem ser capazes de produzir estimativas que separem a covariância típica de cada uma das subpopu
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/05/2011
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7. Modelos não-lineares para dados longitudinais provenientes de experimentos em blocos casualizados abordagem bayesiana / Nonlinear models for longitudinal data from experiments in randomized block design a bayesian framework
Data consisting of repeated measurements taken on each of a number of individual arise commonly in agricultural and biological applications. Modeling data of this kind usually involves the characterization of the relationship between the measured response and covariate. In many application,the proposed systematic relationship between the measured response is
Publicado em: 2011
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8. Effects of experimental pulmonary hemodynamic overload on cardiovascular system and pulmonary structural and function / Efeitos da sobrecarga hemodinâmica pulmonar experimental no sistema cardiovascular e na estrutura e função pulmonar
INTRODUCTION: The pulmonary hemodynamic overload (PHO) is associates to high mortality and morbidity clinical entities as: postpneumonectomy pulmonary edema, pulmonary thromboembolism, lung transplantation and physiological situations as physical exercise. Some pathophysiological aspects related to PHO are not elucidated. OBJECTIVES: To study pulmonary and c
Publicado em: 2010
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9. Evolução da modularidade no crânio de mamíferos / Evolution of modularity in the mammalian skull
Morphological integration refers to the modular structuring of intertrait relationships in an organism, which could bias the direction and rate of morphological change, either constraining or facilitating evolution along certain dimensions of the morphospace. Therefore, the description of morphological integration patterns and its magnitude and the analysis
Publicado em: 2009
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10. Optimum filtering to improve the performance of DOA-ML estimators / Filtragem otima para melhorar o desempenho de estimadores DOA-ML
We approached the estimation of direction of arrival (DOA) of plane waves using an array of sensors. In the literature there are several DOA estimators, but we considered only the maximum likelihood (ML) estimators that generate candidates for DOA estimation and select the best one through an ML criterion. We also considered situations where the signal sourc
Publicado em: 2009
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11. Estimação não-parametrica para função de covariancia de processos gaussianos espaciais / Nonparametric estimation for covariance function of spatial gaussian processes
O desafio na modelagem de processos espaciais está na descrição da estrutura de covariância do fenômeno sob estudo. Um estimador não-paramétrico da função de covariância foi construído de forma a usar combinações lineares de funções B-splines. Estas bases são usadas com muita frequência na literatura graças ao seu suporte compacto e a compu
Publicado em: 2009
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12. Ontogenia craniana comparada de Arctocephalus australis, Callorhinus ursinus e Otaria byronia (Otariidae: Pinnipedia)
The search for mechanisms that can generate major morphological changes has led to the study of ontogeny, in part because some kinds of modifications of ontogenies seem an excelent way to generate major phenotypic change. We focus here on Arctocephlaus australis, Callorhinus ursinus and Otaria byronia with the aim of contributing to the understanding of the
Publicado em: 2009