Gamma Models
Mostrando 1-12 de 243 artigos, teses e dissertações.
-
1. THE EM ALGORITHM FOR STANDARD STOCHASTIC FRONTIER MODELS
ABSTRACT The Expectation-Maximization (EM) algorithm is developed for the stochastic frontier models most used in practice with cross-section data. The resulting algorithms can be easily programmed into a computer and are shown to be worthy alternatives to general-purpose optimization routines currently used. The algorithms for the half normal and the expone
Pesqui. Oper.. Publicado em: 02/12/2019
-
2. Modeling residual biomass from mechanized wood harvesting with data measured by forest harvester
Abstract: The lack of accurate models for estimating residual biomass in wood harvesting operations results in underutilization of this co-product by forestry companies. Due to the lack of this information, forestry operations planning, such as chipping and transport logistics, are influenced, with a consequent increase in costs. Thereby, the aim of this stu
An. Acad. Bras. Ciênc.. Publicado em: 02/12/2019
-
3. Risk of Obstructive Sleep Apnea and Echocardiographic Parameters
Resumo Fundamento: A apneia obstrutiva do sono (AOS) é um transtorno crônico, progressivo, com alta morbimortalidade e associado às doenças cardiovasculares (DCV), entre elas a insuficiência cardíaca (IC). As alterações fisiopatológicas relacionadas com a AOS podem impactar diretamente a função diastólica do ventrículo esquerdo. Objetivo: Esti
Arq. Bras. Cardiol.. Publicado em: 23/09/2019
-
4. Association between consumption of ultra-processed foods and serum C-reactive protein levels: cross-sectional results from the ELSA-Brasil study
ABSTRACT BACKGROUND: There may be a direct association between consumption of ultra-processed foods and C-reactive protein (CRP) levels, under the assumption that the high glycemic index of these food products could stimulate the entire chronic inflammation cascade, along with an indirect association mediated by obesity. The types of food consumed, includi
Sao Paulo Med. J.. Publicado em: 15/07/2019
-
5. ESTIMATIVAS DE PARÂMETROS GENÉTICOS E DE AMBIENTE PARA MEDIDAS REPETIDAS DE PRODUÇÃO LEITEIRA EM CAPRINOS
Resumo Objetivou-se com este estudo comparar funções matemáticas no ajuste da curva de lactação média e individual de caprinos e estimar parâmetros genéticos e ambientais para medidas repetidas de produção de leite. Foram utilizadas 183 lactações, sendo 121 de cabras Saanen e 62 de cabras Alpinas, de animais pertencentes ao Laboratório de Caprin
Ciênc. anim. bras.. Publicado em: 10/06/2019
-
6. Leaf area estimate of Pennisetum glaucum by linear dimensions
ABSTRACT. Leaf area measurements are of the main parameters used in agronomic studies to evaluate plant growth. The current study used a non-destructive method based on linear leaf dimensions (length and width) to select the regression model to estimate millet (Pennisetum glaucum) leaf area. For two millet genotype (IPA BULK 1 BF and ADR 300) 128 randomly-ch
Acta Sci., Anim. Sci.. Publicado em: 25/02/2019
-
7. Impact of autologous whole blood administration upon experimental mouse models of acute Trypanosoma cruzi infection
Abstract Background: Autologous whole blood (AWB) administration is described as alternative/complementary medical practice widely employed in medical and veterinary therapy against infections, chronic pathologies and neoplasias. Our aim is to investigate in vivo biological effect of AWB using healthy murine models under the course of Trypanosoma cruzi acut
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 21/09/2018
-
8. Simultaneous prestack seismic inversion in a carbonate reservoir
Abstract We applied a method of Simultaneous Prestack Seismic Inversion (SPSI) in a hydrocarbon field located in the Campos Basin, Brazil. The goal was to study the application of this method to Albian carbonate rocks of the Quissamã Formation. Based on what is found in nearby fields, this Formation potentially contains hydrocarbon accumulations that can be
REM, Int. Eng. J.. Publicado em: 2018-03
-
9. Sedative and muscle relaxant activities of diterpenoids from Phlomidoschema parviflorum
Abstract Phlomidoschema parviflorum (Benth.) Vved. (Basionym: Stachys parviflora Benth.) Lamiaceae, have significance medicinal importance as it is used in number of health disorders including diarrhea, fever, sore mouth and throat, internal bleeding, weaknesses of the liver and heart genital tumors, sclerosis of the spleen, inflammatory tumors and cancerous
Rev. bras. farmacogn.. Publicado em: 2017-10
-
10. IL-10 down-regulates the expression of survival associated gene hspX of Mycobacterium tuberculosis in murine macrophage
Abstract Mycobacterium tuberculosis (MTB) adopts a special survival strategy to overcome the killing mechanism(s) of host immune system. Amongst the many known factors, small heat shock protein 16.3 (sHSP16.3) of MTB encoded by gene hspX has been reported to be critical for the survival of MTB. In the present study, the effect of recombinant murine interfero
Braz J Infect Dis. Publicado em: 2017-08
-
11. Diameter distribution in a Brazilian tropical dry forest domain: predictions for the stand and species
ABSTRACT Currently, there is a lack of studies on the correct utilization of continuous distributions for dry tropical forests. Therefore, this work aims to investigate the diameter structure of a brazilian tropical dry forest and to select suitable continuous distributions by means of statistic tools for the stand and the main species. Two subsets were rand
An. Acad. Bras. Ciênc.. Publicado em: 2017-06
-
12. ESTIMATE OF REFERENCE EVAPOTRANSPIRATION THROUGH CONTINUOUS PROBABILITY MODELLING
ABSTRACT This study aimed at testing the fit of continuous probability distributions to a daily reference evapotranspiration dataset (ET0) at a 75% probability level for designing of irrigation systems. Reference evapotranspiration was estimated by the Penman-Monteith method (FAO-56-PM) for eight locations, within the state of Espírito Santo (Brazil), where
Eng. Agríc.. Publicado em: 2017-04