کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9741804 | 1489781 | 2005 | 17 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Testing for directional symmetry in spatial dependence using the periodogram
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
ریاضیات
ریاضیات کاربردی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The characterization of spatial dependence is an important component of a spatial modeling exercise. For reasons of convenience, model parsimony, or computational efficiency, the spatial covariance structure is often assumed to have directional invariance properties such as reflection symmetry or completely symmetry. We propose some diagnostic tests of reflection symmetry and complete symmetry that are based on the two-dimensional periodogram. An advantage of basing tests on the periodogram rather than the sample semivariogram or covariance function is that the periodogram ordinates corresponding to different frequencies are asymptotically independent, leading to simpler distribution theory. A simulation study and two examples illustrate the usefulness and limitations of the proposed tests.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Statistical Planning and Inference - Volume 129, Issues 1â2, 15 February 2005, Pages 369-385
Journal: Journal of Statistical Planning and Inference - Volume 129, Issues 1â2, 15 February 2005, Pages 369-385
نویسندگان
Nelson Lu, Dale L. Zimmerman,