Zobrazeno 1 - 10
of 116
pro vyhledávání: '"Donato, Posa"'
Publikováno v:
Journal of Statistical Software, Vol 94, Iss 1, Pp 1-42 (2020)
Although a very rich list of classes of space-time covariance functions exists, specific tools for selecting the appropriate class for a given data set are needed. Thus, the main topic of this paper is to present the new R package, covatest, which ca
Externí odkaz:
https://doaj.org/article/32c919c7774041e29b7c552a4d0dd3a3
Publikováno v:
Encyclopedia of Mathematical Geosciences ISBN: 9783030260507
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b57441341254edfabfbcf019f9449c29
https://doi.org/10.1007/978-3-030-26050-7_308-2
https://doi.org/10.1007/978-3-030-26050-7_308-2
Publikováno v:
International Statistical Review. 89:36-53
The concepts of isotropy/anisotropy and separability/non-separability of a covariance function are strictly related. If a covariance function is separable, it cannot be isotropic or geometrically anisotropic, except for the Gaussian covariance functi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ac0231d678e766077fdbb6993d8b5fd8
https://doi.org/10.1111/insr.12403
https://doi.org/10.1111/insr.12403
Publikováno v:
Mathematical Geosciences. 53:999-1025
Surface ocean currents are often of interest in environmental monitoring. These vectorial data can be reasonably treated as a finite realization of a complex- valued random field, where the decomposition in modulus (current speed) and direction (curr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b67e56b2cfb9643bef4b934a92370e17
https://doi.org/10.1007/s11004-020-09880-3
https://doi.org/10.1007/s11004-020-09880-3
Publikováno v:
Encyclopedia of Mathematical Geosciences ISBN: 9783030260507
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b23951c6f930ad01be14983b3d356ea
https://doi.org/10.1007/978-3-030-26050-7_308-1
https://doi.org/10.1007/978-3-030-26050-7_308-1
Publikováno v:
Spatial Statistics. 29:89-108
Although isotropy, symmetry and separability are commonly assumed for practical reasons, anisotropic, asymmetric and non-separable covariance functions are often more realistic; in addition, strict positive definiteness is also desirable, since it en
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3550ccae2f195b918d36778289318363
https://doi.org/10.1016/j.spasta.2018.09.003
https://doi.org/10.1016/j.spasta.2018.09.003
Publikováno v:
Social Indicators Research. 146:1-5
This Special Issue has drawn inspiration from the Conference “Innovation & Society 2017—Statistical Methods for Evaluation and Quality” (IES2017), held at the University of Naples “Federico II” (Italy) September 6–7, 2017. The IES2017 Con
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::70433296fdd190aa69631b82e7a426ba
https://doi.org/10.1007/s11205-019-02098-9
https://doi.org/10.1007/s11205-019-02098-9
Oceanographic data belong to the wide class of vectorial data, for which the decomposition in modulus and direction is meaningful, and the vectorial components are characterized by homogeneous quantities, with the same unit of measurement. Another fe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::abd4e8e7c1cc4ba58181c9f8a2900379
https://doi.org/10.5194/egusphere-egu21-16382
https://doi.org/10.5194/egusphere-egu21-16382
Autor:
Donato Posa
Publikováno v:
Stochastic Environmental Research and Risk Assessment.
A linear combination, with negative weights, of two continuous covariance functions has been analyzed by a few authors just for special cases and only in the real domain. However, a covariance is a complex valued function: for this reason, the genera
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9cfb113411333ad3b923c763b708d59c
https://doi.org/10.1007/s00477-020-01947-1
https://doi.org/10.1007/s00477-020-01947-1
In multivariate context, it is common to adopt the linear coregionalization model (LCM) based on isotropic independent hidden components underlying the phenomenon of interest. In this paper, a spatio-temporal LCM which takes into account the presence
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______4034::8a918bf2b555112ffe30660c0f1901cc
https://hdl.handle.net/11587/454595
https://hdl.handle.net/11587/454595