Results 71 to 80 of about 4,118 (206)

Variabilidade espacial da agregação do solo avaliada pela geometria fractal e geoestatística Spatial variability of soil aggregation evaluated by fractal geometry and geostatistics

Revista Brasileira de Ciência do Solo, 2004
Este trabalho teve por objetivo explorar a aplicabilidade da teoria de fractais no estudo da variabilidade espacial em agregação de solo. A geometria de fractais tem sido proposta como um modelo para a distribuição de tamanho de partículas.
J. R. P. Carvalho, S. C. F. Dechen, G. Dufranc   +2 more
doaj   +1 more source

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.
openaire   +1 more source

Geodetic Constraints on Fault Kinematics and Dynamics of 2021 Maduo Earthquake: Implications for Fault Friction

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 7, July 2026.
Abstract Postseismic afterslip has been inferred to occur on fault barriers surrounding coseismic asperities, which can be explained by velocity‐strengthening friction in barriers and velocity‐weakening friction in asperities. However, afterslip also exhibits spatial overlap with coseismic slip for some events.
Yuan Gao, Qi Ou, Jin Fang, Manon Carpenter, Tim J. Wright, Kali Allison, Wei Qu, Qin Zhang, Milan Lazecký, Yasser Maghsoudi, Zhong Lu   +10 more
wiley   +1 more source

Methods for estimating the semivariogram

, 2002
Modelling spatial variability, typically in terms of the semivariogram, is of great interest when the objective is to compute spatial predictions of parameters measured in space.
Carstensen, Niels Jacob, Rootzen, Helle, Lophaven, Søren Nymand, Carstensen, Jacob   +3 more
core  

FITTING MODEL SEMIVARIOGRAM TEORITIS DENGAN MENGGUNAKAN SOFTWARE GEOSTATISTICS FOR THE ENVIRONMENTAL SCIENCES VERSION 9 (GS-9) [PDF]

, 2014
Semivariogram merupakan perangkat yang digunakan untuk menggambarkan, mcmodelkan dan menghitung kortlasi spasial antara peubah acak regiooal Z(s) a* Z(s+n).
Faisal, Fachri
core   +2 more sources

Uma proposta alternativa para a análise de experimentos de campo utilizando a geoestatística An alternative proposal to the analysis of field experiments using geostatistics

Ciência e Agrotecnologia, 2004
Com este trabalho, objetivou-se apresentar uma metodologia para a análise de experimentos de campo, utilizando a geoestatística (erros correlacionados) articulada com a análise convencional (erros independentes).
José Marcelo Pontes, Marcelo Silva de Oliveira   +1 more
doaj   +1 more source

Spatial Distribution Based on Semivariogram Model

, 2009
This article aims to discuss some aspects in conducting inferential analysis of census data.In this analysis, the assumptions of normality and IID (independently and identically distribution)in the observations are no longer realistic. Hence conventional
Pawitan, G. (Gandi)
core  

Variabilidade espacial de fatores de erosão em Latossolo Vermelho eutroférrico sob cultivo de cana-de-açúcar Spatial variability of the erosion factors in eutrudox Red Latosol under sugarcane crop

Engenharia Agrícola, 2005
Visando a avaliar a variabilidade espacial de fatores de erosão em Latossolo Vermelho eutroférrico, foram obtidas amostras do solo em intervalos regulares de 50 m, em forma de grid, totalizando 206 pontos de amostragem.
Zigomar M. de Souza, Marcílio V. Martins Filho, José Marques Júnior, Gener T. Pereira   +3 more
doaj   +1 more source

Variabilidade temporal da precipitação mensal e anual na estação climatológica de Uberaba-MG Temporal variability of monthly rains in the climatological station of Uberaba-MG, Brazil

Ciência e Agrotecnologia, 2003
A análise da variabilidade espacial e da variabilidade temporal de atributos naturais vem recebendo destaque nos últimos tempos, devido à possibilidade de se realizar estimativas com maior precisão, destacando-se entre esses atributos a precipitação ...
José Waldemar da Silva, Ednaldo Carvalho Guimarães, Marcelo Tavares   +2 more
doaj   +1 more source

Spatial dependence in experiments of progeny selection for bean ( Phaseolus vulgaris L.) yield

Revista Ceres
In field experiments, it is often assumed that errors are statistically independent, but not always this condition is met, compromising the results. An inappropriate choice of the analytical model can compromise the efficiency of breeding programs in ...
Michele Jorge da Silva, Antonio Policarpo Souza Carneiro, Andréia Luiza Gonzaga Feres, José Eustáquio Souza Carneiro, Nerilson Terra Santos, Paulo Roberto Cecon   +5 more
doaj   +1 more source