[ABE-L] Divulgação Seminário PPGEst-UFRGS

[Fábio Mariano Bayer]

Prezados,

Temos o prazer de convidar a todos para mais um seminário do Ciclo de
Seminários 2021 do Programa de Pós-Graduação em Estatística da UFRGS
(PPGEst-UFRGS). Informações abaixo:

*Evento*: Ciclo de Seminários 2021 do PPGEst-UFRGS

*Palestrante*: Dr. Guilherme Vieira Nunes Ludwig (UNICAMP)

*Título*: Scalable modeling of nonstationary covariance functions with
non-folding B-spline deformations

*Resumo*: We propose a method for nonstationary covariance function
modeling, based on the spatial deformation method of Sampson and Guttorp
(1992), but using a low-rank, scalable deformation function written as a
linear combination of the tensor product of B-spline basis. This approach
addresses two important weaknesses in current computational aspects. First,
it allows one to constrain estimated 2D deformations to be non-folding
(bijective) in 2D. This requirement of the model has, up to now, been
addressed only by arbitrary levels of spatial smoothing. Second, basis
functions with compact support enable the application to large datasets of
spatial monitoring sites of environmental data. An application to rainfall
data in southeastern Brazil illustrates the method.

This is a joint work with Ronaldo Dias (UNICAMP) and Paul Sampson
(University of Washington).

*Data*: 23 de agosto de 2021 (segunda-feira)

*Horário*: 14h00 às 15:20 (60 min de apresentação e 20 min para perguntas)

*Local*: Ambiente virtual Mconf. Link: https://mconf.ufrgs.br/webconf/ppgest

*Moderador*: Prof. Márcio Valk (PPGEst-UFRGS)

Contamos com a presença de todos.

PPGEst-UFRGS

Fábio Bayer


"A big computer, a complex algorithm and a long time does not equal
science." Robert Gentleman
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