Results 81 to 90 of about 9,305 (199)
Studia Geotechnica et Mechanica, 2017 Geostatistical methods make the analysis of measurement data possible. This article presents the problems directed towards the use of geostatistics in spatial analysis of displacements based on geodetic monitoring.
Namysłowska-Wilczyńska Barbara +1 more
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Influência do Tipo de Amostragem na Estimativa de Volume de Madeira de Eucalipto por Krigagem
Floresta e AmbienteRESUMO O objetivo da pesquisa foi verificar se a estimativa do volume individual de madeira por árvore realizada pela krigagem é influenciada pelo tipo de amostragem. Um povoamento com 1.875 árvores de eucalipto foi demarcado em um plano cartesiano (X, Y)
Wellington Jorge Cavalcanti Lundgren +2 more
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BANDWIDTH SELECTION FOR SPATIAL HAC AND OTHER ROBUST COVARIANCE ESTIMATORS [PDF]
This research note documents estimation procedures and results for an empirical investigation of the performance of the recently developed spatial, heteroskedasticity and autocorrelation consistent (HAC) covariance estimator calibrated with different ...
Dayton M. Lambert +2 more
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Estimating potential soil erosion for environmental services in a sugarcane growing area using multisource remote sensing data [PDF]
, 2013 Characterization of landscapes is crucial in modelling potential soil erosion to ascertain environmental services that are provided by the main land use in the ecosystem. Remote sensing techniques have proved successful in characterization of landscapes.
Bégué, Agnès +4 more
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Graph Variogram: A novel tool to measure spatial stationarity
, 2018 Irregularly sampling a spatially stationary random field does not yield a graph stationary signal in general. Based on this observation, we build a definition of graph stationarity based on intrinsic stationarity, a less restrictive definition of ...
Girault, Benjamin +2 more
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Revista Brasileira de Engenharia Agrícola e Ambiental, 2002 Para se de identificar a variabilidade espacial da textura e da densidade de partículas em um solo hidromórfico, realizou-se uma amostragem sistemática ao longo de uma transeção de 100 m de comprimento, paralela a um curso d'água, com espaçamentos entre ...
Edson S. Eguchi +2 more
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Measuring Spatial Dependence with Semivariograms
Bulletin (Kansas Geological Survey), 1977 The semivariogram is a measure of statistical dependence and is closely related to the autocorrelogram. It is particularly suitable for analysis of spatial functions that describe natural phenomena characterized by a geographic distribution and variations which arc in part continuous and in part stochastic.
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Wayne E. Sabbe Arkansas Soil Fertility Studies 2017 [PDF]
, 2017 Rapid technological changes in crop management and production require that the research efforts be presented in an expeditious manner. The contributions of soil fertility and fertilizers are major production factors in all Arkansas crops.
Slaton, Nathan A.
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Türkiye Tarımsal Araştırmalar Dergisi, 2018 Assessment, evaluation and mapping of the spatial characteristics of soil properties are crucial to ensure the sustainability of plant production and the development of appropriate management practices in the areas of intensive agricultural production.
Mesut BUDAK +4 more
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Cesium Concentration Spatial Distribution Modeling by Point Cumulative Semivariogram
Water, Air, and Soil Pollution, 2008 The theoretical basis of the proposed technique is the cumulative variation of 137Cs measurements’ squared-differences between a reference and other sites. The change of the cumulative squared-differences with distance from the reference site is referred to as the point cumulative semivariogram (PCSV), which provides appropriate measure of cumulative ...
Kuelahci, Fatih +2 more
openaire +2 more sources