Results 51 to 60 of about 31,493 (191)

Providing a subsurface reservoir quality maps in oil fields by geostatistical methods

open access: yesGeodesy and Cartography, 2013
Under study reservoir oilfield is located south-west of Iran. This field is comprised of naturally fractured Asmari and Bangestan formation. Reservoir management and characteristic evaluation of this field requires good knowledge of reservoir rock and ...
Hakimeh Amanipoor
doaj   +1 more source

History Matching Using Principal Component Analysis [PDF]

open access: yes, 2011
Imperial Users ...
Sharma, Akshay, Sharma, Akshay
core  

A New Cokriging Method for Variable-Fidelity Surrogate Modeling of Aerodynamic Data [PDF]

open access: yes, 2010
Cokriging is a statistical interpolation method for the enhanced prediction of a less intensively sampled primary variable of interest with assistance of intensively sampled auxiliary variables. In the geostatistics community it is referred to as two- or
Görtz, Stefan   +2 more
core   +1 more source

Optimizing Flood Hazard Zonation and Planning Landscape‐Based Mitigation Measures in Gimba Sub Watersheds, Northeastern Ethiopia: A Comprehensive Approach

open access: yesJournal of Flood Risk Management, Volume 19, Issue 1, March 2026.
ABSTRACT Flooding remains one of the most critical natural hazards threatening livelihoods, infrastructure, and ecological systems in Ethiopia's highland landscapes. This study presents a rigorously integrated, multi‐criteria flood risk assessment that combines the Analytical Hierarchy Process (AHP) with GIS‐based spatial modeling to delineate ...
Degfie Teku   +3 more
wiley   +1 more source

Contemporary Applications of Geostatistics to Soil Studies

open access: yesSoil Systems
This Special Issue presents carefully selected examples of Contemporary Applications of Geostatistics to Soil Studies [...]
Jarosław Zawadzki
doaj   +1 more source

Stochastic models which separate fractal dimension and Hurst effect [PDF]

open access: yes, 2001
Fractal behavior and long-range dependence have been observed in an astonishing number of physical systems. Either phenomenon has been modeled by self-similar random functions, thereby implying a linear relationship between fractal dimension, a measure ...
Constantine A. G.   +7 more
core   +2 more sources

A Mixture Transition Distribution Modeling for Higher‐Order Circular Markov Processes

open access: yesJournal of Time Series Analysis, Volume 47, Issue 2, Page 304-320, March 2026.
ABSTRACT This study considers the stationary higher‐order Markov process for circular data by employing the mixture transition distribution modeling. The underlying circular transition distribution is based on Wehrly and Johnson's bivariate joint circular models.
Hiroaki Ogata, Takayuki Shiohama
wiley   +1 more source

Bootstrap based uncertainty bands for prediction in functional kriging [PDF]

open access: yes, 2016
The increasing interest in spatially correlated functional data has led to the development of appropriate geostatistical techniques that allow to predict a curve at an unmonitored location using a functional kriging with external drift model that takes ...
Franco-Villoria, Maria   +1 more
core   +3 more sources

The Impact of OCO‐2 Seasonally Dependent Sampling on Carbon Flux Estimation in the Northern Tropical Africa

open access: yesGeophysical Research Letters, Volume 53, Issue 4, 28 February 2026.
Abstract The large annual carbon source over northern tropical Africa (NTA), inferred from satellite CO2, remains highly debated. Using observing system simulation experiments with Orbiting Carbon Observatory‐2 (OCO‐2) sampling, we show that seasonally dependent sampling can lead to overestimated annual fluxes.
Junjie Liu   +4 more
wiley   +1 more source

Homogenisation of Wind Data for the Period 1997–2023 in Hungary and Analysis of Different Methods Used for Deriving Daily Wind Data

open access: yesInternational Journal of Climatology, Volume 46, Issue 2, February 2026.
To bridge the discrepancy between pre‐1997 sparse wind observations and post‐1997 high‐frequency data, we simulate historical daily wind observations from 10‐min data (1997–2023). These simulations enable spatially consistent wind speed estimations across Hungary using MASH homogenisation and MISH interpolation, with seasonal differences evaluated ...
Kinga Bokros   +3 more
wiley   +1 more source

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