Zobrazeno 1 - 10
of 424
pro vyhledávání: '"EMERY, XAVIER"'
This article presents a neural network approach for estimating the covariance function of spatial Gaussian random fields defined in a portion of the Euclidean plane. Our proposal builds upon recent contributions, expanding from the purely isotropic s
Externí odkaz:
http://arxiv.org/abs/2408.10915
This work addresses the problem of simulating Gaussian random fields that are continuously indexed over a class of metric graphs, termed graphs with Euclidean edges, being more general and flexible than linear networks. We introduce three general alg
Externí odkaz:
http://arxiv.org/abs/2404.17491
Autor:
Alegría, Alfredo, Emery, Xavier
Covariance functions are a fundamental tool for modeling the dependence structure of spatial processes. This work investigates novel constructions for covariance functions that enable the integration of anisotropies and hole effects in complex and ve
Externí odkaz:
http://arxiv.org/abs/2306.04483
Characteristic functions that are radially symmetric have a dual interpretation, as they can be used as the isotropic correlation functions of spatial random fields. Extensions of isotropic correlation functions from balls into $d$-dimensional Euclid
Externí odkaz:
http://arxiv.org/abs/2204.05032
Autor:
Aghahadi, Mohammad Hossein, Jozanikohan, Golnaz, Asghari, Omid, Talesh Hosseini, Sajjad, Emery, Xavier, Rezaei, Mohammadali
Publikováno v:
In Applied Geochemistry October 2024 173
Autor:
Emery, Xavier, Alegría, Alfredo
This paper presents a parametric family of compactly-supported positive semidefinite kernels aimed to model the covariance structure of second-order stationary isotropic random fields defined in the $d$-dimensional Euclidean space. Both the covarianc
Externí odkaz:
http://arxiv.org/abs/2101.09558
This paper addresses the problem of finding parametric constraints that ensure the validity of the multivariate Mat{\'e}rn covariance for modeling the spatial correlation structure of coregionalized variables defined in an Euclidean space. To date, m
Externí odkaz:
http://arxiv.org/abs/2101.04235
Autor:
Alegría, Alfredo, Emery, Xavier
Publikováno v:
In Journal of Multivariate Analysis March 2024 200
Random fields on the sphere play a fundamental role in the natural sciences. This paper presents a simulation algorithm parenthetical to the spectral turning bands method used in Euclidean spaces, for simulating scalar- or vector-valued Gaussian rand
Externí odkaz:
http://arxiv.org/abs/2003.13486
Autor:
Veliz, Veronica, Maleki, Mohammad, Madani, Nasser, Soltani-Mohammadi, Saed, Mery, Nadia, Emery, Xavier
Publikováno v:
In Ore Geology Reviews November 2023 162