نتایج جستجو برای: co kriging

تعداد نتایج: 337567  

Journal: :JORS 2003
Wim C. M. Van Beers Jack P. C. Kleijnen

Whenever simulation requires much computer time, interpolation is needed. There are several interpolation techniques in use (for example, linear regression), but this paper focuses on Kriging. This technique was originally developed in geostatistics by D. G. Krige, and has recently been widely applied in deterministic simulation. This paper, however, focuses on random or stochastic simulation. ...

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...

2002
Donald E. Myers

The interpolation of spatial data has been considered in many different forms. The various forms of kriging are among the best known in the earth sciences although techniques such as inverse distance weighting were and are in use for spatially located data. In the numerical analysis literature various forms of splines and more recently radial basis functions have been developed and used. Becaus...

Journal: :آب و خاک 0
قمر فدوی جواد بذرافشان

introduction: as the statistical time series are in short period and the meteorological station are not distributed well in mountainous area determining of climatic criteria are complex. therefore, in recent years interpolation methods for establishment of continuous climatic data have been considered. continuous daily maximum temperature data are a key factor for climate-crop modeling which is...

بروشکه, ابراهیم, سکوتی اسکوئی, رضا, نیک کامی, داود,

Rainfall erosivity is one of the major factors of soil erosion that expressed as some indices. The objective of this study is to determine the appropriate rainfall erosivity index in West Azarbaijan in relation to soil loss at the erosion standard plates. After recording the rainfall amounts in a certain time periods, erosivity indices calculated and appropriate index was selected for the area....

2012
Asmatullah Chaudhry Anwar M. Mirza

We present a general comparison of punctual kriging based image restoration for different neighbourhood sizes. The formulation of the technique under consideration is based on punctual kriging and fuzzy concepts for image restoration in spatial domain. Three different neighbourhood windows are considered to estimate the semivariance at different lags for studying its effect in reduction of nega...

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...

Journal: :محیط زیست طبیعی 0
سهیلا براتی گروه محیط زیست، دانشکده منابع طبیعی، دانشگاه صنعتی اصفهان نوراله میرغفاری گروه محیط زیست، دانشکده منابع طبیعی، دانشگاه صنعتی اصفهان علیرضا سفیانیان گروه محیط زیست، دانشکده منابع طبیعی، دانشگاه صنعتی اصفهان لقمان خداکرمی گروه محیط زیست، دانشکده منابع طبیعی، دانشگاه صنعتی اصفهان

heavy metals are very important from environmental consideration due to their toxicity and accumulative properties. the aim of this study is the evaluation of spatial distribution of cr, co and ni in the surface soils of hamadan province. for this purpose, the surface soil samples (0-20 cm) were collected using systematic random sampling method and the concentration of heavy metals and some of ...

2002
Hyoung-Seog Chung Juan J. Alonso

In this paper we study the ability of the Cokriging method to represent functions with multiple local minima and sharp discontinuities for use in the multidimensional design of a low-boom supersonic business jet wing-body-canard configuration. Cokriging approximation models are an extension of the original Kriging method which incorporate secondary information such as the values of the gradient...

Journal: :Remote Sensing 2017
Michael Schirrmann André Hamdorf Antje Giebel Franziska Gleiniger Michael Pflanz Karl-Heinz Dammer

A crop height model (CHM) can be an important element of the decision making process in agriculture, because it relates well with many agronomic parameters, e.g., crop height, plant biomass or crop yield. Today, CHMs can be inexpensively obtained from overlapping imagery captured from unmanned aerial vehicle (UAV) platforms or from proximal sensors attached to ground-based vehicles used for reg...

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