Results 101 to 110 of about 19,252 (217)
Optimal designs for variogram estimation
Environmetrics, 1999 The variogram plays a central role in the analysis of geostatistical data. A valid variogram model is selected and the parameters of that model are estimated before kriging (spatial prediction) is performed. These inference procedures are generally based upon examination of the empirical variogram, which consists of average squared differences of data ...
Müller, Werner, Zimmerman, Dale L.
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Two Approaches to Imputation and Adjustment of Air Quality Data from a Composite Monitoring Network [PDF]
, 2009 An analysis of air quality data is provided for the municipal area of Taranto characterized by high environmental risks, due to the massive presence of industrial sites with elevated environmental impact activities.
JONA LASINIO, Giovanna, Pollice, A.
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Providing a subsurface reservoir quality maps in oil fields by geostatistical methods
Geodesy 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
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Accounting for Geometric Anisotropy in Sparse Magnetic Data Using a Modified Interpolation Algorithm
Remote SensingThe construction of a high-precision geomagnetic map is a prerequisite for geomagnetic navigation and magnetic target-detection technology. The Kriging interpolation algorithm makes use of the variogram to perform linear unbiased and optimal estimation ...
Haibin Li +11 more
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Kriging algorithm for mapping the gravimetric data in the north of Algeria
Geodetski VestnikThe purpose of this work is to analyze and validate the gravimetric information in the study area in order to highlight the valid data for mapping the gravity anomaly from a grid generated by interpolation. In this context, we have performed a first step
Ilies Benikhlef +2 more
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Optimal Information Acquisition under a Geostatistical Model
Journal of Agricultural and Resource Economics, 1999 Studies examining the value of switching to a variable rate technology (VRT) fertilizer program assume producers possess perfect soil nitrate information. In reality, producers estimate soil nitrate levels with soil sampling.
Gregory R. Pautsch +2 more
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The Spatial Distribution of Tree Dieback Affected by Mistletoe in Relation to their Crown Characteristics [PDF]
جغرافیا و پایداری محیط, 2016 1- Introduction One of the main problems in The Zagros Forests is oak trees dieback. What is really certain and important is the fact that the tree dieback crisis caused the declining of oak in oak forest of Zagros. Oak decline is characterized by crown
Erfan Boshkar +2 more
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, 2015 The plurigaussian model is particularly suited to describe categorical regionalized variables. Starting from a simple principle, the thresh-olding of one or several Gaussian random fields (GRFs) to obtain categories, the plurigaussian model is well ...
Beucher, Hélène +4 more
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Geophysical Research LettersCold pools formed by precipitating convective clouds are an important source of mesoscale temperature variability. However, their sub‐mesoscale (100 m–10 km) structure has not been quantified, impeding validation of numerical models and understanding of ...
Leah D. Grant +7 more
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Properties of the intrinsically stationary stochastic processes
Журнал Белорусского государственного университета: Математика, информатика, 2017 Intrinsically stationary random processes with continuous time are investigated. Their connections with second-order stationary processes and processes with the second-order stationary increments are studied.
Tatsiana V. Tsekhavaya
doaj