نتایج جستجو برای: multiple indicator kriging

تعداد نتایج: 832556  

Journal: :International Journal of Geographical Information Science 2011
Guofeng Cao Phaedon C. Kyriakidis Michael F. Goodchild

This article may be used for research, teaching, and private study purposes. Any substantial or systematic reproduction, redistribution, reselling, loan, sub-licensing, systematic supply, or distribution in any form to anyone is expressly forbidden. The publisher does not give any warranty express or implied or make any representation that the contents will be complete or accurate or up to date...

Journal: :Geociências 2021

This paper presents two novel kriging-based methods to measure the uncertainty associated with geostatistical estimates. Both approaches combine Kriging Variance (KV), which is a good summary of spatial configuration data, second component locally measures data dispersion. The first proposed method, referred as Combined Index (CI), merges KV local conditional distribution estimated by median In...

Journal: :iranian journal of earth science 0
shahrokh paravarzar department of mining and metallurgical engineering, amirkabir university of technology, 1359767191 tehran, iran nasser madani advance mining technology center (amtc), santiago, chile abbas maghsoudi department of mining and metallurgical engineering, amirkabir university of technology, tehran, iran peyman afza department of mining engineering, faculty of engineering, south tehran branch, islamic azad university, tehran, iran

estimation of gold reserves and resources has been of interest to mining engineers and geologists for ages. the existence of outlier values shows the economic part of the deposits subject to the fact that don’t depend on the human or technical errors. the presence of these high values causes a pseudo dramatically increment in variance estimation of economical blocks when applying conventional m...

2012
Sytze de Bruin Daniela Ballari Arnold Bregt

In case of an environmental accident, initially available data are often insufficient for properly managing the situation. In this paper, new sensor observations are iteratively added to an initial sample by maximising the global expected value of information of the points for decision making. This is equivalent to minimizing the aggregated expected misclassification costs over the study area. ...

Journal: :Environmental pollution 2004
Kai-Wei Juang Yue-Shin Chen Dar-Yuan Lee

Mapping the spatial distribution of soil pollutants is essential for delineating contaminated areas. Currently, geostatistical interpolation, kriging, is increasingly used to estimate pollutant concentrations in soils. The kriging-based approach, indicator kriging (IK), may be used to model the uncertainty of mapping. However, a smoothing effect is usually produced when using kriging in polluta...

Journal: :Quality and Reliability Eng. Int. 2008
David Ginsbourger Céline Helbert Laurent Carraro

Kriging-based exploration strategies often rely on a single Ordinary Kriging model which parametric covariance kernel is selected a priori or on the basis of an initial data set. Since choosing an unadapted kernel can radically harm the results, we wish to reduce the risk of model misspecification. Here we consider the simultaneous use of multiple kernels within Kriging. We give the equations o...

Journal: :Cadernos de saude publica 2008
Ricardo Cerqueira Campos Braga Luís Iván Ortiz Valencia Roberto de Andrade Medronho Claudia Caminha Escosteguy

This study estimated hepatitis A risk areas in a region of Duque de Caxias, Rio de Janeiro State, Brazil. A cross-sectional study consisting of a hepatitis A serological survey and a household survey were conducted in 19 census tracts. Of these, 11 tracts were selected and 1,298 children from one to ten years of age were included in the study. Geostatistical techniques allowed modeling the spat...

2011
Yu-Pin Lin Hone-Jay Chu Chen-Fa Wu Tsun-Kuo Chang Chiu-Yang Chen

Concentrations of four heavy metals (Cr, Cu, Ni, and Zn) were measured at 1,082 sampling sites in Changhua county of central Taiwan. A hazard zone is defined in the study as a place where the content of each heavy metal exceeds the corresponding control standard. This study examines the use of spatial analysis for identifying multiple soil pollution hotspots in the study area. In a preliminary ...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید