Depth Estimation
Mostrando 13-24 de 47 artigos, teses e dissertações.
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13. Pedogenic Iron Oxides in Iron-Rich Oxisols Developed from Mafic Rocks
ABSTRACT Despite the considerable amount of information on the mineralogical characteristics of pedogenic Fe oxides in Brazilian soils, there are few studies on Fe-rich soils developed from mafic rocks with taxonomic identities at lower categorical levels. This study evaluated the mineralogical characteristics of pedogenic Fe oxides in B horizons (Bw) of Fe-
Rev. Bras. Ciênc. Solo. Publicado em: 27/04/2017
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14. Spatial soil sampling design using apparent soil electrical conductivity measurements
ABSTRACT Soil sampling is an important stage of digital soil mapping. The objective of this study was to characterize the spatial design of soil sampling using soil apparent electrical conductivity (ECa) and its optimized spatial sampling. For the characterization, it was used the Spatial Simulated Annealing (SSA) technique, incorporated on the software SANO
Bragantia. Publicado em: 29/09/2016
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15. A New Approach for Severity Estimation of Transversal Cracks in Multi-layered Beams
Abstract Nowadays, the damage severity evaluation in mechanical structures is mostly performed by analyzing the natural frequency shift. The non-isotropic materials, as the multi-layered ones, are wide-spread in industrial applications, due to their interesting physic-mechanical properties. Thus, a deeper approach of multi-layered beams becomes an important
Lat. Am. j. solids struct.. Publicado em: 2016-08
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16. Dispersion of Love wave in an isotropic layer sandwiched between orthotropic and prestressed inhomogeneous half-spaces
Abstract An in-depth study has been carried out for the dispersion of Love waves in an isotropic elastic layer sandwiched between orthotropic and prestressed inhomogeneous elastic half-spaces. The inhomogeneities in density and rigidity of the lower half-space are space dependent and an arbitrary function of depth. Simple mathematical techniques are used to
Lat. Am. j. solids struct.. Publicado em: 2015-10
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17. Neural Network Approach for Estimation of Penetration Depth in Concrete Targets by Ogive-nose Steel Projectiles
AbstractDespite the availability of large number of empirical and semi-empirical models, the problem of penetration depth prediction for concrete targets has remained inconclusive partly due to the complexity of the phenomenon involved and partly because of the limitations of the statistical regression employed. Conventional statistical analysis is now being
Lat. Am. j. solids struct.. Publicado em: 2015-03
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18. Water extraction variability in the banana root zone affects the reliability of water balance
Spatial and temporal variability of soil water extraction from the root zone affect soil water balance determination. The number of sensors installed in the root zone in studies addressing water balance is still set arbitrarily. This study provided an investigation of the water extraction process by banana (Musa spp.) roots by (i) determining the variability
Sci. agric. (Piracicaba, Braz.). Publicado em: 2015-02
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19. Segmentação de pessoas em imagens estáticas baseada em esqueleto
The segmentation of people (automatic or semi-automatic) in still images is a very challenging task, mainly due to several factors in the real world, such as those related to the lighting of the scene where the image was captured, shadows, image noise, occlusions, high similarity of the object of interest with the background of the scene and the lack of info
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/04/2012
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20. Assessing soil carbon stocks under pastures through orbital remote sensing
The growing demand of world food and energy supply increases the threat of global warming due to higher greenhouse gas emissions by agricultural activity. Therefore, it is widely admitted that agriculture must establish a new paradigm in terms of environmental sustainability that incorporate techniques for mitigation of greenhouse gas emissions. This article
Scientia Agricola. Publicado em: 2011-10
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21. Numerical procedure for estimating temperature in solarized soils.
The objective of this work was to develop a simplified numerical procedure for the estimation of accumulated monthly hours of solarized soil temperatures. The proposed model requires monthly means of daily solar radiation and maximum air temperature as input data, and a daily pattern of temperature variation assumed to be sine-shaped. The procedure was verif
Pesquisa Agropecuária Brasileira. Publicado em: 2011
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22. Resíduo da colheita de eucalipto e fontes de cálcio na agregação do solo e na estabilização da matéria orgânica / Crop residue of eucalyptus and calcium sources on soil aggregation and stabilization of organic matter
The interaction of organic compounds with divalent cations such as calcium (Ca) may improve soil aggregation and polymerise the organic molecules, forming metal-organic complexes more stable. The effectiveness of Ca on the aggregation in forest soils, in field conditions, and the influence of different sources of Ca in decomposing residues of eucalyptus and
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/07/2010
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23. Predição de mapas de profundidades a partir de imagens monoculares por Meio de Redes Neurais Sem Peso
Um problema central para a Visão Computacional é o de depth estimation (estimativa de profundidades) isto é, derivar, a partir de uma ou mais imagens de uma cena, um depth map (mapa de profundidades) que determine as distâncias entre o observador e cada ponto das várias superfícies capturadas. Não é surpresa, portanto, que a abordagem de stereo corre
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2010
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24. Índices radiomorfométricos de mandíbula e densidade mineral óssea em crianças saudáveis e com diagnóstico de osteogênese imperfeita
Bone mass aquisition in childhood is an important factor in fractures and osteoporosis prevention. Many studies show correlations between bone mineral densities and mandibular radiomorphometric indices in adults. The objective of this research was to verify if such a correlation exists also in growing individuals. Spine and whole-body densitometries and pano
Publicado em: 2009