Correlated Errors
Mostrando 1-12 de 68 artigos, teses e dissertações.
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1. FUZZY MODELING OF THE EFFECTS OF DIFFERENT IRRIGATION DEPTH IN RADISH CROP. PART II: BIOMETRIC VARIABLES ANALYSIS
ABSTRACT In order to estimate the response of biometric variables in different irrigation depths in radish crop, as well as their relations in the development of the crop, a fuzzy mathematical analysis was carried out from irrigation with depths of different percentages of the crop evapotranspiration (ETc), using Gaussian pertinence functions for the input v
Eng. Agríc.. Publicado em: 2021-05
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2. Considering the impact of observation error correlation in ensemble square-root Kalman filter
Abstract Data assimilation has been developed into an effective technology that can utilize a large number of multi-source unconventional data. It cannot only provide the initial field for the ocean numerical prediction model, but also construct the ocean reanalysis datasets and provide the design basis for the ocean observation plan. In data assimilation, t
Braz. j. oceanogr.. Publicado em: 02/12/2019
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3. Anterior chamber depth and axial length affect clinical performance of Spot Vision Screener
RESUMO Objetivo: O objetivo deste estudo foi avaliar o efeito da profundidade da câmara anterior e do comprimento axial sobre o desempenho clínico do Spot Vision Screener, na deteção de fatores de risco para a ambliopia em crianças de 3 a 10 anos de idade. Métodos: Um total de 300 olhos de 150 pacientes de 3-10 anos de idade foram prospectivamente te
Arq. Bras. Oftalmol.. Publicado em: 28/10/2019
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4. Proposal of a trophic state index in semiarid reservoirs using data of the Banabuiú Basin, state of Ceará, Brazil
Resumo Objetivo O presente trabalho teve como objetivo desenvolver um Índice de Estado Trófico que simule o impacto cumulativo em 18 reservatórios da bacia hidrográfica do Banabuiú, localizada no semiárido cearense. Métodos Foram analisadas variáveis físicas (temperatura, transparência e turbidez), químicas (oxigênio dissolvido, pH e fósforo t
Acta Limnol. Bras.. Publicado em: 21/10/2019
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5. Performance of the Groenevelt and Grant Model for Fitting Soil Water Retention Data from Brazilian Soils
ABSTRACT The soil water retention curve (SWRC) is essential for vadose zone hydrological modeling and related applications. In 2004, Groenevelt and Grant (GRT) presented a mathematical model for describing the SWRC and reported its mathematical versatility and good fit to soils from a Dutch database. In order to evaluate the application of GRT to SWRCs of Br
Rev. Bras. Ciênc. Solo. Publicado em: 22/07/2019
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6. Predicting urine output after kidney transplantation: development and internal validation of a nomogram for clinical use
ABSTRACT Purpose: To analyze pre-transplantation and early postoperative factors affecting post-transplantation urine output and develop a predictive nomogram. Patients and Methods: Retrospective analysis of non-preemptive first transplanted adult patients between 2001-2016. The outcomes were hourly diuresis in mL/Kg in the 1st (UO1) and 8th (UO8) postoper
Int. braz j urol.. Publicado em: 27/06/2019
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7. Recurrent Algorithm for TDOA Localization in Sensor Networks
ABSTRACT: Using the mathematical apparatus of the extended Kalman Filter, the recurrent algorithm of the passive location in sensor networks - based on the Time Difference of Arrival method in case of correlated errors of measurements - is developed. The initial estimates of Radio Frequency Sources coordinates and the correlation matrix of the vector estimat
J. Aerosp. Technol. Manag.. Publicado em: 02/10/2017
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8. Establishing the minimal number of virtual reality simulator training sessions necessary to develop basic laparoscopic skills competence: evaluation of the learning curve
Introduction Medical literature is scarce on information to define a basic skills training program for laparoscopic surgery (peg and transferring, cutting, clipping). The aim of this study was to determine the minimal number of simulator sessions of basic laparoscopic tasks necessary to elaborate an optimal virtual reality training curriculum. Materials a
Int. braz j urol.. Publicado em: 2013-09
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9. Dimensional analysis and empirical correlations for heat transfer and pressure drop in condensation and evaporation processes of flow inside micropipes: case study with carbon dioxide (CO2)
In this paper, the experimental results of the convection heat transfer coefficient and pressure drop values during condensation and evaporation of CO2 were obtained at different operating conditions for flow inside micropipes. Reynolds number (ReD) ranged between 2000 and 15000. The dimensional analysis technique was utilized to develop correlations for Nus
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2012-03
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10. Active sensor as a tool for nitrogen application in spring wheat / Sensor óptico ativo como ferramenta para aplicação de nitrogênio na cultura do trigo
Nitrogen fertilization in spring wheat in southern Brazil is based on yield potential, soil organic matter and previous crop. These variables are not precise and subjected to errors, resulting on N losses and yield potential reduction. For N fertilization, it is necessary to quantify plant N nutritional status to determine top dressing N rates to be applied.
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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11. O uso de ondaletas em modelos FANOVA / Wavelets FANOVA models
O problema de estimação funcional vem sendo estudado de formas variadas na literatura. Uma possibilidade bastante promissora se dá pela utilização de bases ortonormais de wavelets (ondaletas). Essa solução _e interessante por sua: frugalidade; otimalidade assintótica; e velocidade computacional. O objetivo principal do trabalho é estender os testes
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/10/2011
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12. Comparação de combinação de previsões correlacionadas e não correlacionadas com as suas previsões individuais : um estudo com séries industriais
A realização de previsões adequadas nas indústrias oportuniza o correto dimensionamento de diversos aspectos da gestão da produção. Um dos métodos empregados no intuito de melhorar a precisão das previsões é conhecido como combinação de previsões. Ao longo dos anos, foram publicados estudos de combinação a fim de comparar os métodos já exis
Publicado em: 2011