Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Garry N. Newsam"'
Publikováno v:
GEOPHYSICS. 68:1257-1266
The first part of the paper presents a method for frequency domain deconvolution of airborne gamma‐ray surveys using a Wiener filter. A geometrical detector model is used to model gamma‐ray detection, with aircraft movement simply incorporated by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::03a8cae5ce692667c4b1ab130ec079e0
https://doi.org/10.1190/1.1598118
https://doi.org/10.1190/1.1598118
Publikováno v:
GEOPHYSICS. 67:1810-1822
A wide class of interpolation methods, including thin‐plate and tension splines, kriging, sinc functions, equivalent‐source, and radial basis functions, can be encompassed in a common mathematical framework involving continuous global surfaces (C
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b9500c557014c75725a9e8c8ee02a81a
https://doi.org/10.1190/1.1527081
https://doi.org/10.1190/1.1527081
Publikováno v:
GEOPHYSICS. 67:1823-1834
Continuous global surfaces (CGS) are a general framework for interpolation and smoothing of geophysical data. The first of two smoothing techniques we consider in this paper is generalized cross validation (GCV), which is a bootstrap measure of the p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a468193b42c7a096e29c3badb6fadf80
https://doi.org/10.1190/1.1527082
https://doi.org/10.1190/1.1527082
Publikováno v:
SIAM Journal on Scientific Computing. 23:1549-1571
A generalized multiquadric radial basis function is a function of the form $ s(x) = \sum_{i=1}^N d_i \phi(|x -t_i|), $ where $ \phi(r)= ( r^2+\tau^2 )^{k/2}$, $x \in \mathbb{R}^n$, and $k\in\mathbb{Z}$ is odd. The direct evaluation of an N center gen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::67645f9cd9b33598afe20f956dbd18ba
https://doi.org/10.1137/s1064827500367609
https://doi.org/10.1137/s1064827500367609
Autor:
Garry N. Newsam, Rick Beatson
Publikováno v:
SIAM Journal on Scientific Computing. 19:1428-1449
This paper presents a new method for the fast evaluation of univariate radial basis functions of the form $s(x) = \sum_{n=1}^N d_n \phi ( | x -x_n | ) $ to within accuracy $\epsilon$. The method can be viewed as a generalization of the fast multipole
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::62c40fdf1c03f859be2ac845f20fb019
https://doi.org/10.1137/s1064827595293569
https://doi.org/10.1137/s1064827595293569
Autor:
C. R. Dietrich, Garry N. Newsam
Publikováno v:
Scopus-Elsevier
Geostatistical simulations often require the generation of numerous realizations of a stationary Gaussian process over a regularly meshed sample grid $\Omega$. This paper shows that for many important correlation functions in geostatistics, realizati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b645721da6a373eda9a22868dfe0f20e
https://doi.org/10.1137/s1064827592240555
https://doi.org/10.1137/s1064827592240555
Autor:
Garry N. Newsam, C. R. Dietrich
Publikováno v:
Water Resources Research. 32:1643-1652
Recently Dietnch and Newsam [1993] derived a fast and exact method for generating unconditional realizations of a stationary, multidimensional Gaussian random field on a rectangular sampling grid. The method is based on embedding the random field cov
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e3b537ac4d1c8aa4c44d547e6fd3d9dc
https://doi.org/10.1029/94wr02977
https://doi.org/10.1029/94wr02977
Autor:
C. R. Dietrich, Garry N. Newsam
Publikováno v:
Water Resources Research. 29:2861-2869
To generate multidimensional Gaussian random fields over a regular sampling grid, hydrogeologists can call upon essentially two approaches. The first approach covers methods that are exact but computationally expensive, e.g., matrix factorization. Th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b265c8aec1ecb32cf633cca4d6013a45
https://doi.org/10.1029/93wr01070
https://doi.org/10.1029/93wr01070
Autor:
Garry N. Newsam, Rick Beatson
Publikováno v:
Computers & Mathematics with Applications. 24(12):7-19
This paper describes some new techniques for the rapid evaluation and fitting of radial basic functions. The techniques are based on the hierarchical and multipole expansions recently introduced by several authors for the calculation of many-body pot
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bcb9eff7371f42415dd62f5a694e6274
Publikováno v:
Applied optics. 36(35)
We report on an analysis of statistical correlations in midwave IR imagery acquired from an airborne sensor flying over dense forest and sparsely covered terrain. We test for wide-sense stationarity, compute ensemble histograms, and estimate the auto
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::659de0aefc5411f1dbfab0f78fe15e34
https://pubmed.ncbi.nlm.nih.gov/18264475
https://pubmed.ncbi.nlm.nih.gov/18264475