کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10524606 957581 2005 25 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A formal test for nonstationarity of spatial stochastic processes
موضوعات مرتبط
مهندسی و علوم پایه ریاضیات آنالیز عددی
پیش نمایش صفحه اول مقاله
A formal test for nonstationarity of spatial stochastic processes
چکیده انگلیسی
In this manuscript, we consider the problem of testing a given spatial process for stationarity and isotropy. The approach is based on a spatial spectral analysis, this means spectral functions which are space dependent. The proposed method consists essentially in testing the homogeneity of a set of spatial spectra evaluated at different locations. In addition to testing stationarity and isotropy, the analysis provides also a method for testing whether the observed process fits a uniformly modulated model, and a test for randomness (white noise). Applications include modeling and testing for nonstationary of air pollution concentrations over different geo-political boundaries.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Multivariate Analysis - Volume 96, Issue 1, September 2005, Pages 30-54
نویسندگان
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