نتایج جستجو برای: kriging method within box

تعداد نتایج: 2552265  

Journal: :CoRR 2013
Firas A. Jassim

Image inpainting is the art of predicting damaged regions of an image. The manual way of image inpainting is a time consuming. Therefore, there must be an automatic digital method for image inpainting that recovers the image from the damaged regions. In this paper, a novel statistical image inpainting algorithm based on Kriging interpolation technique was proposed. Kriging technique automatical...

Journal: :بوم شناسی کشاورزی 0
مهدی نصیری محلاتی علیرضا کوچکی مریم جهانی

within-field variation of wheat yield and spatial pattern of weed density and soil nitrogen were evaluated by geostatistical methods. samples were taken from a 90×120 m area located in a 3.8 ha wheat field. soil nitrogen content and weed density at tillering and wheat yield at maturity were measured in 1 m2 plots located at the center of 10×10 m grids. grain yield was varied between 1.5-4.9 t h...

2001
Ezio Todini

This paper deals with a theoretical approach to assessing the effects of parameter estimation uncertainty both on Kriging estimates and on their estimated error variance. Although a comprehensive treatment of parameter estimation uncertainty is covered by full Bayesian Kriging at the cost of extensive numerical integration, the proposed approach has a wide field of application, given its relati...

Mohammad Miri , Mohammad Hassan Ehrampoush, Mohammad Javad Zare Sakhvidi , Sara Jamshidi ,

Introduction: The present study aimed to compare the performance of two widely-used models for spatial assessment of particulate matter less than 10 microns (PM10) in ambient air of Yazd city. Finally, effective factors on concentrations of pollutants and corresponding standards were investigated. Materials and Methods: A number of 13 sampling stations were employed in different areas of Yazd ...

2016
Trang VoPham Jaime E. Hart Kimberly A. Bertrand Zhibin Sun Rulla M. Tamimi Francine Laden

BACKGROUND Ultraviolet B (UV-B) radiation plays a multifaceted role in human health, inducing DNA damage and representing the primary source of vitamin D for most humans; however, current U.S. UV exposure models are limited in spatial, temporal, and/or spectral resolution. Area-to-point (ATP) residual kriging is a geostatistical method that can be used to create a spatiotemporal exposure model ...

Journal: :desert 0
a. afzali desert management dept., international desert research center (idrc), university of tehran h. keshtkar faculty of natural resources, university of tehran, karaj, iran s. pakzad desert management dept., international desert research center (idrc), university of tehran n. moazami desert management dept., international desert research center (idrc), university of tehran e. azizabadi farahani desert management dept., international desert research center (idrc), university of tehran a. golpaygani desert management dept., international desert research center (idrc), university of tehran e. khosrojerdi

drought monitoring is a fundamental component of drought risk management. it is normally performed using various drought indices that are effectively continuous functions of rainfall and other hydrometeorological variables. in many instances, drought indices are used for monitoring purposes. geostatistical methods allow the interpolation of spatially referenced data and the prediction of values...

2002
Alexandra Kravchenko Renduo Zhang

Precipitation is a function of many topographical land features as well as geographical locations. Spatial correlations between precipitation and topographical and geographical features can be used to improve estimation of precipitation distributions. In this study, kriging with external drift of topographical information was utilized for determining precipitation spatial distributions in Wyomi...

Journal: :Environmental pollution 2004
David McGrath Chaosheng Zhang Owen T Carton

Spatial distribution and hazard assessment of soil lead in the mining site of Silvermines, Ireland, were investigated using statistics, geostatistics and geographic information system (GIS) techniques. Positively skewed distribution and possible outlying values of Pb and other heavy metals were observed. Box-Cox transformation was applied in order to achieve normality in the data set and to red...

Journal: :Environmental science & technology 2009
C M Aelion H T Davis Y Liu A B Lawson S McDermott

Bayesian kriging is a useful tool for estimating spatial distributions of metals; however, estimates are generally only verified statistically. In this study surface soil samples were collected on a uniform grid and analyzed for As, Cr, Pb, and Hg. The data were interpolated at individual locations by Bayesian kriging. Estimates were validated using a leave-one-out cross validation (LOOCV) stat...

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