Uncertainty Propagation
Mostrando 1-12 de 20 artigos, teses e dissertações.
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1. Determination of Electric and Magnetic Field Calculation Uncertainty in the Vicinity of Overhead Transmission Lines
Abstract This paper presents a new approach for uncertainty determination of the electric field intensity and magnetic flux density calculation in the vicinity of overhead transmission lines. The proposed method is based on the law of propagation of uncertainty as defined in the Guide to the expression of Uncertainty in Measurement. A mathematical model is d
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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2. Fuzzy Modelling to Describe the Pollutant Concentration in Fluids
ABSTRACT The study of the concentration dynamics of a pollutant substance in a fluid is a classic problem of fluid mechanics given by the transport equation u t + cu x = 0, where u = u(x,t) denotes the pollutant concentration along a horizontal pipe of a fixed cross-section in the positive x direction at he time t > 0 and c represents the fluid propagation
Trends in Computational and Applied Mathematics. Publicado em: 2022
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3. Só erra quem faz, e quem faz erra! um manifesto pelo cálculo da propagação de incertezas
Making experimental measurements, whether we are at peace in the face of such a reality or not, invariably involves experimental uncertainty. Unfortunately, presenting uncertainty alongside the results is not as widespread as it should be. The author attempts here to simplify, improve understanding, and appeal to a healthy living with uncertainty. One of the
Quím. Nova. Publicado em: 2020-02
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4. Determining the In Situ Apparent Thermal Diffusivity of a Sandy Soil
ABSTRACT: The thermal wave amplitude method is used to determine soil thermal diffusivity in situ for a sandy soil in Mexico (Coatzacoalcos, Veracruz). Soil diurnal temperature fluctuations were measured from depths of 0.05 to 0.65 m, in 0.01 m increments, during the months of April and August. Five mean diffusivity values were obtained experimentally, corre
Rev. Bras. Ciênc. Solo. Publicado em: 14/11/2018
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5. Measurement uncertainty of plane-strain fracture toughness KIC testing by the Monte Carlo Method
Abstract The reliable determination of materials' mechanical properties is a fundamental factor for their application in engineering, and the estimation of the measurement uncertainty in testing laboratories has a direct impact on the interpretation of the results. Recent literature demonstrates that one of the most widely used methodologies for uncertainty
REM, Int. Eng. J.. Publicado em: 2018-04
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6. Error propagation in open respirometric assays
This work deals with the calculation of the uncertainty of the exogenous respiration rate (Rex) and the total oxygen consumed (OCT) derived from a single open respirometric profile. Uncertainties were evaluated by applying a linear error propagation method. Results show that standard deviations (SD) of Rex and OCT depend not only on the SD of the dissolved o
Braz. J. Chem. Eng.. Publicado em: 2014-06
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7. Monitoração de doses em radiologia: a calibração de medidores do produto kerma-área (PKA)
Objective The authors have sought to study the calibration of a clinical PKA meter (Diamentor E2) and a calibrator for clinical meters (PDC) in the Laboratory of Ionizing Radiation Metrology at Instituto de Energia e Ambiente - Universidade de São Paulo. Materials and Methods Different qualities of both incident and transmitted beams were utilized in condi
Radiol Bras. Publicado em: 2013-12
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8. Analysis of propagation of uncertainties in the inverse dynamics method three-dimensional lower limb during gait at different velocities / Análise da propagação de incertezas no método de dinâmica inversa tridimensional por membro inferior durante a marcha em diferentes velocidades
O objetivo deste estudo foi investigar o efeito do erro na localização do centro de pressão (5 e 10 mm) nas incertezas de momentos articulares dos membros inferiores em diferentes velocidades de marcha (1,0, 1,5 e 2,0 m/s). Nossas hipóteses foram que: as incertezas absolutas de momento articular diminuam de distal para o proximal e da condição de maior
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/09/2012
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9. Dynamics of rotating non-linear thin-walled composite beams: analysis of modeling uncertainties
In this article a non-linear model for dynamic analysis of rotating thin-walled composite beams is introduced. The theory is deduced in the context of classic variational principles and the finite element method is employed to discretize and furnish a numerical approximation to the motion equations. The model considers shear flexibility as well as non-linear
J. Braz. Soc. Mech. Sci. & Eng.. Publicado em: 2012
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10. Avaliação das incertezas associadas à determinação do parâmetro de solubilidade de Hildebrand de petróleos
Asphaltenes are fractions of crude oils that can precipitate and one of the parameters used in the prediction of the conditions in which this phenomenon occurs is the Hildebrand solubility parameter. In this work, it was evaluated the uncertainty propagation in the experimental determination of the solubility parameter of different crude oils, calculated fro
Química Nova. Publicado em: 2011
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11. Proposição, avaliação numérica e experimental de um absorvedor dinâmico de vibrações multimodal / Proposal, Numerical and Experimental Evaluation of a Multimodal Vibration Dynamic Absorber
Dynamic Vibration Absorbers (DVA) have been widely used for passive control of structural vibrations. In their simplest configurations, those devices have their mitigation capacity confined to narrow frequency bands, which limits, to a large extent, their practical effectiveness. In this work, it is proposed a methodology for the optimal design of a multimod
Publicado em: 2009
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12. Retroanálise probabilista aplicada à análise dinâmica da cravação de estacas. / Probabilistic back-analysis applied to dynamic loading test for pile driving.
An dynamic loading test can be performed in concrete piles, bored piles, drilled shafts, auger cast-in-place (continuous flight auger) piles. Such essay bases on the Theory of the Propagation of Wave in piles with the aim of evaluate the capacity of static load mobilized from the dynamic event. The analysis of the test is made by a PC program (p.e. CAPWAP or
Publicado em: 2008