Alfredo Alegría Jiménez

Encargado de Seminarios

Línea de Investigación:

Probabilidad y Estadística

Información:

  • Grado Académico: Ph.D Universidad Técnica Federico Santa María
  • Título Profesional: Ingeniero Civil Matemático, Universidad Técnica Federico Santa María
  • Campus: Casa Central
  • Oficina: F-258
  • Email: alfredo.alegria@usm.cl
  • Teléfono: (56) (32) 265 4488
  • Sitio Web

Publicaciones Recientes

Núm. Autores Artículo Revista Año
14

A. Alegría, X. Emery, E. Porcu

Bivariate Matérn Covariances with Cross-Dimple for Modeling Coregionalized Variables

Spatial Statistics Volume 41, March 2021, 100491

2021
13

A. Alegría, F. Cuevas

Karhunen–Loève expansions for axially symmetric Gaussian processes: modeling strategies and L2 approximations

Stochastic Environmental Research and Risk Assessment, Vol 34, 1953–1965.

2020
12

X. Emery, A. Alegría

A spectral algorithm to simulate nonstationary random fields on spheres and multifractal star-shaped random sets

Stochastic Environmental Research and Risk Assessment volume 34, pages2301–2311(2020)

2020
11

A. Alegría, X. Emery, C. Lantuéjoul

The turning arcs: a computationally efficient algorithm to simulate isotropic vector-valued Gaussian random fields on the d-sphere

Statistics and Computing, Vol 30(5), 1403-1418.

2020
10
A. Alegría
Cross‐dimple in the cross‐covariance functions of bivariate isotropic random fields on spheres

Stat, Vol 9(1), e301.

2020
9

E. Porcu, S. Castruccio, A. Alegría, P. Crippa

Axially symmetric models for global data: A journey between geostatistics and stochastic generators​

Environmetrics; Vol 30(1), pp. e255; Jan. 2019.

2019
8

A. Alegría , E. Porcu, R. Furrer, J. Mateu

Covariance functions for multivariate Gaussian fields evolving temporally over planet Earth

Stochastic Environmental Research and Risk Assessment; Vol. 33(8), pp. 1593-1608; Aug. 2019.

2019
7

E. Porcu, A. Alegría and R. Furrer

Modeling Temporally Evolving and Spatially Globally Dependent Data

International Statistical Review, 86(2), 344-377.

2018
6

A. Alegría, E. Porcu and R. Furrer

Asymmetric Matrix-Valued Covariances for Multivariate Random Fields on Spheres

Journal of Statistical Computation and Simulation, 88(10), 1850-1862.

2018
5

J. Clarke, A. Alegría and E. Porcu

Regularity properties and simulations of Gaussian random fields on the sphere cross time

Electronic Journal of Statistics, 12(1), 399-426.

2018
4

A. Alegría and E. Porcu

The dimple problem related to space-time modeling under the Lagrangian framework

Journal of Multivariate Analysis, 162, 110-121.

2017
3

A. Alegría, S. Caro, M. Bevilacqua, E. Porcu and J. Clarke

Estimating covariance functions of multivariate skew-Gaussian random fields on the sphere

Spatial Statistics, 22, 388-402.

2017
2

A. Alegría, M. Bevilacqua and E. Porcu

Likelihood-based inference for multivariate space-time wrapped-Gaussian fields

Journal of Statistical Computation and Simulation, 86(13), 2583-2597.

2016
1

M. Bevilacqua, A. Alegría, D. Velandia and E. Porcu

Composite likelihood inference for multivariate Gaussian random fields

Journal of Agricultural Biological and Environmental Statistics, 21(3), 448-469.

2016

Proyectos Vigentes

Programa Nombre Proyecto Periodo
FONDECYT INICIACIÓN 11190686 New Developments in Multivariate Spatial Statistics: Anisotropies by Components, Cross-Dimples, and Non-Normal Distributions, and their Applications 2019 - 2022