نتایج جستجو برای: kriging with measurement errors

تعداد نتایج: 9371823  

Journal: :محیط زیست طبیعی 0
سید حسین خزاعی عضو هیئت علمی گروه محیط زیست، دانشکده منابع طبیعی دریا، دانشگاه علوم و فنون دریایی خرمشهر، ایران مهدیه دالوند دانش آموخته کارشناسی محیط زیست، دانشکده منابع طبیعی دریا، دانشگاه علوم و فنون دریایی خرمشهر، ایران بهناز اسکندری دانش آموخته کارشناسی محیط زیست، دانشکده منابع طبیعی دریا، دانشگاه علوم و فنون دریایی خرمشهر، ایران روح الله تقی زاده مهرجردی استادیار دانشکده کشاورزی، منابع طبیعی و کویرشناسی، مجتمع آموزش عالی اردکان، ایران

according to the importance of groundwater resources in providing of human needs, lack of control and inappropriate management of these resources can lead to the problems such as nitrate pollutions arising from the use of chemical fertilizers in agricultural lands. with generalized point data to the area using the geostatistics methods can be determine the pollution content in areas without sam...

Journal: Desert 2018

After collecting data, in researches, the type of data distribution must be determined; since any analysis requires the distribution of its own data. Soil properties, such as salinity, are also the same case. Due to its direct and indirect effects on plant growth, soil salinity is an important feature that has always been investigated in agriculture and natural resources, leading to a lot of re...

2015
Maogui Hu Jianghao Wang Mengxiao Liu Shaomin Liu Ziwei Xu

Sensible heat flux (H) plays an important role in characterizations of land surface water and heat balance. There are various types of H measurement methods that depend on observation scale, from local-area-scale eddy covariance (EC) to regional-scale large aperture scintillometer (LAS) and remote sensing (RS) products. However, methods of converting one H scale to another to validate RS produc...

Journal: :IACR Cryptology ePrint Archive 2016
Yarkin Doröz Berk Sunar

We propose a new FHE scheme F-NTRU that adopts the flattening technique proposed in GSW to derive an NTRU based scheme that (similar to GSW) does not require evaluation keys or key switching. Our scheme eliminates the decision small polynomial ratio (DSPR) assumption but relies only on the standard R-LWE assumption. It uses wide key distributions, and hence is immune to the Subfield Lattice Att...

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...

2009
Liang Zhao K. K. Choi Ikjin Lee David Gorsich

1. Abstract Over three decades, metamodeling has been widely applied to design optimization problems to build a surrogate model of computation-intensive engineering models. The Kriging method has gained significant interests for developing the surrogate model. However, traditional Kriging methods, including the ordinary Kriging and the universal Kriging, use fixed polynomials basis functions to...

Journal: :Actuators 2021

In this paper, a method for the improvement of calculation accuracy distributed parameter model (DPM) electromagnetic devices is proposed based on kriging basis function predictive identification program (PIP). Kriging mainly an optimal interpolation which uses spatial self-covariance, and takes polynomial as function. The kriging-based surrogate can be improved by adjusting related functions h...

Journal: :Journal of Statistical Computation and Simulation 2022

In this paper, we used the newly proposed exponential calibration for additive distortion measurement errors models, where neither response variable nor covariates can be directly observed but are distorted in fashions by an confounding variable. By using calibrated variables, three estimators of parameters and empirical likelihood-based confidence intervals proposed, studied asymptotic propert...

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