نتایج جستجو برای: block kriging

تعداد نتایج: 163351  

Journal: :European Journal of Operational Research 2009
Jack P. C. Kleijnen

This article reviews Kriging (also called spatial correlation modeling). It presents the basic Kriging assumptions and formulas—contrasting Kriging and classic linear regression metamodels. Furthermore, it extends Kriging to random simulation, and discusses bootstrapping to estimate the variance of the Kriging predictor. Besides classic one-shot statistical designs such as Latin Hypercube Sampl...

2013
Jay M. Ver Hoef Erin E. Peterson David Clifford Rohan Shah

The SSN package for R provides a set of functions for modeling stream network data. The package can import geographic information systems data or simulate new data as a ‘SpatialStreamNetwork’, a new object class that builds on the spatial sp classes. Functions are provided that fit spatial linear models (SLMs) for the ‘SpatialStreamNetwork’ object. The covariance matrix of the SLMs use distance...

2005
Shaobo Zhong Yong Xue Chunxiang Cao Wuchun Cao Xiaowen Li Jianping Guo Liqun Fang

This paper presents the application of Exploratory Spatial Data Analysis (ESDA) and Kriging from GIS (ArcGIS8.3) in disease mapping through the analysis of hepatitis B in China. The research shows that geostatistical analysis techniques such as Kriging and ESDA have a good effect in disease mapping. Kriging methods can express properly the spatial correlation. Furthermore, unlike model-based me...

2006
Duanping Liao Donna J. Peuquet Yinkang Duan Eric A. Whitsel Jianwei Dou Richard L. Smith Hung-Mo Lin Jiu-Chiuan Chen Gerardo Heiss

Spatial estimations are increasingly used to estimate geocoded ambient particulate matter (PM) concentrations in epidemiologic studies because measures of daily PM concentrations are unavailable in most U.S. locations. This study was conducted to a) assess the feasibility of large-scale kriging estimations of daily residential-level ambient PM concentrations, b) perform and compare cross-valida...

Journal: :جنگل و فرآورده های چوب 0
عفت رضایی دانشجوی کارشناسی ارشد جنگل داری، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات تهران، تهران، ایران رضا اخوان استادیار پژوهش، بخش تحقیقات جنگل، مؤسسۀ تحقیقات جنگل ها و مراتع کشور، تهران، ایران جواد سوسنی استادیار، دانشکدۀ کشاورزی، دانشگاه لرستان، خرم آباد، ایران مهدی پورهاشمی استادیار پژوهش، بخش تحقیقات جنگل، مؤسسۀ تحقیقات جنگل ها و مراتع کشور، تهران، ایران

estimation and mapping of forest resources is a precondition for management, planning and research.this research was conducted to investigate the spatial structure and estimation of crown cover anddensity of an oak forest in the west of iran (loristan province) using kriging interpolation method ofgeostatistics. field sampling was performed based on a 100 m×100 m systematic grid using 2000 m2ci...

Journal: :IJORIS 2011
Heping Liu Yanli Chen

This paper applies a novel Kriging model to the interpolation of stochastic simulation with high computational expense. The novel Kriging model is developed by using Taylor expansion to construct a drift function for Kriging, thus named Taylor Kriging. The interpolation capability of Taylor Kriging for stochastic simulation is empirically compared with those of Simple Kriging and Ordinary Krigi...

2004
Olaf Berke

In geostatistics, spatial data will be analysed that often come from irregularly distributed sampling locations. Interest is in modelling the data, i.e. estimating distributional parameters, and then to predict the phenomenon under study at unobserved sites within the corresponding sampling domain. The method of universal kriging for spatial prediction was introduced to cover the problem of spa...

2001
Olaf Berke

In geostatistics, spatial data will be analysed that often come from irregularly distributed sampling locations. Interest is in modelling the data, i.e. estimating distributional parameters, and then to predict the phenomenon under study at unobserved sites within the corresponding sampling domain. The method of universal kriging for spatial prediction was introduced to cover the problem of spa...

Journal: :JIPS 2015
Xuan Thanh Nguyen Ba Tung Nguyen Khac Phong Do Quang Hung Bui Thi Nhat Thanh Nguyen Van Quynh Vuong Thanh Ha Le

This paper presents the applications of Kriging spatial interpolation methods for meteorologic variables, including temperature and relative humidity, in regions of Vietnam. Three types of interpolation methods are used, which are as follows: Ordinary Kriging, Universal Kriging, and Universal Kriging plus Digital Elevation model correction. The input meteorologic data was collected from 98 grou...

Journal: :Marine environmental research 2003
Molly Leecaster

Maps are useful scientific tools for presenting environmental information, but the statistical techniques necessary to prepare scientifically rigorous maps have primarily focused on terrestrial habitats. This study compares three popular techniques (triangulation, kriging, and co-kriging) to map sediment grain size in Santa Monica Bay, California. Two grain size data sets, one collected in 1994...

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