Works matching AU Porcu, Emilio

Results: 73

Vector-valued Gaussian processes on non-Euclidean product spaces: constructive methods and fast simulations based on partial spectral inversion.

Published in:

Stochastic Environmental Research & Risk Assessment, 2024, v. 38, n. 9, p. 3411, doi. 10.1007/s00477-024-02755-7

By:

Emery, Xavier;
Mery, Nadia;
Porcu, Emilio

Publication type:

Article

Positive semidefinite kernels that are axially symmetric on the sphere and stationary in time: spectral and semi-spectral theory, and constructive approaches.

Published in:

Stochastic Environmental Research & Risk Assessment, 2024, v. 38, n. 6, p. 2315, doi. 10.1007/s00477-024-02681-8

By:

Emery, Xavier;
Jäger, Janin;
Porcu, Emilio

Publication type:

Article

A catalogue of nonseparable positive semidefinite kernels on the product of two spheres.

Published in:

Stochastic Environmental Research & Risk Assessment, 2023, v. 37, n. 4, p. 1497, doi. 10.1007/s00477-022-02347-3

By:

Emery, Xavier;
Peron, Ana Paula;
Porcu, Emilio

Publication type:

Article

Multivariate Kalman filtering for spatio-temporal processes.

Published in:

Stochastic Environmental Research & Risk Assessment, 2022, v. 36, n. 12, p. 4337, doi. 10.1007/s00477-022-02266-3

By:

Ferreira, Guillermo;
Mateu, Jorge;
Porcu, Emilio

Publication type:

Article

Strict positive definiteness under axial symmetry on the sphere.

Published in:

Stochastic Environmental Research & Risk Assessment, 2020, v. 34, n. 5, p. 723, doi. 10.1007/s00477-020-01796-y

By:

Bissiri, Pier Giovanni;
Peron, Ana Paula;
Porcu, Emilio

Publication type:

Article

A semiparametric class of axially symmetric random fields on the sphere.

Published in:

Stochastic Environmental Research & Risk Assessment, 2019, v. 33, n. 10, p. 1863, doi. 10.1007/s00477-019-01725-8

By:

Emery, Xavier;
Porcu, Emilio;
Bissiri, Pier Giovanni

Publication type:

Article

Simulating isotropic vector-valued Gaussian random fields on the sphere through finite harmonics approximations.

Published in:

Stochastic Environmental Research & Risk Assessment, 2019, v. 33, n. 8/9, p. 1659, doi. 10.1007/s00477-019-01717-8

By:

Emery, Xavier;
Porcu, Emilio

Publication type:

Article

Covariance functions for multivariate Gaussian fields evolving temporally over planet earth.

Published in:

Stochastic Environmental Research & Risk Assessment, 2019, v. 33, n. 8/9, p. 1593, doi. 10.1007/s00477-019-01707-w

By:

Alegría, Alfredo;
Porcu, Emilio;
Furrer, Reinhard;
Mateu, Jorge

Publication type:

Article

Z-estimators and auxiliary information for strong mixing processes.

Published in:

Stochastic Environmental Research & Risk Assessment, 2019, v. 33, n. 1, p. 1, doi. 10.1007/s00477-018-1602-5

By:

Crudu, Federico;
Porcu, Emilio

Publication type:

Article

Admissible nested covariance models over spheres cross time.

Published in:

Stochastic Environmental Research & Risk Assessment, 2018, v. 32, n. 11, p. 3053, doi. 10.1007/s00477-018-1576-3

By:

Peron, Ana;
Porcu, Emilio;
Emery, Xavier

Publication type:

Article

Seismomatics.

Published in:

Stochastic Environmental Research & Risk Assessment, 2017, v. 31, n. 7, p. 1577, doi. 10.1007/s00477-017-1395-y

By:

Porcu, Emilio;
Fassò, Alessandro;
Barrientos, Sergio;
Catalán, Patricio

Publication type:

Article

An improved spectral turning-bands algorithm for simulating stationary vector Gaussian random fields.

Published in:

Stochastic Environmental Research & Risk Assessment, 2016, v. 30, n. 7, p. 1863, doi. 10.1007/s00477-015-1151-0

By:

Emery, Xavier;
Arroyo, Daisy;
Porcu, Emilio

Publication type:

Article

Spatial prediction for infinite-dimensional compositional data.

Published in:

Stochastic Environmental Research & Risk Assessment, 2015, v. 29, n. 7, p. 1737, doi. 10.1007/s00477-014-1010-4

By:

Salazar, Elías;
Giraldo, Ramón;
Porcu, Emilio

Publication type:

Article

Classes of compactly supported covariance functions for multivariate random fields.

Published in:

Stochastic Environmental Research & Risk Assessment, 2015, v. 29, n. 4, p. 1249, doi. 10.1007/s00477-014-0996-y

By:

Daley, Daryl;
Porcu, Emilio;
Bevilacqua, Moreno

Publication type:

Article

Combining Euclidean and composite likelihood for binary spatial data estimation.

Published in:

Stochastic Environmental Research & Risk Assessment, 2015, v. 29, n. 2, p. 335, doi. 10.1007/s00477-014-0938-8

By:

Bevilacqua, Moreno;
Crudu, Federico;
Porcu, Emilio

Publication type:

Article

Latent variables and space-time models for environmental problems.

Published in:

2015

By:

Fassò, Alessandro;
Porcu, Emilio

Publication type:

Editorial

Nonstationary matrix covariances: compact support, long range dependence and quasi-arithmetic constructions.

Published in:

Stochastic Environmental Research & Risk Assessment, 2015, v. 29, n. 1, p. 193, doi. 10.1007/s00477-014-0867-6

By:

Kleiber, William;
Porcu, Emilio

Publication type:

Article

Radial basis functions with compact support for multivariate geostatistics.

Published in:

Stochastic Environmental Research & Risk Assessment, 2013, v. 27, n. 4, p. 909, doi. 10.1007/s00477-012-0656-z

By:

Porcu, Emilio;
Daley, Daryl;
Buhmann, Martin;
Bevilacqua, Moreno

Publication type:

Article

New classes of spectral densities for lattice processes and random fields built from simple univariate margins.

Published in:

Stochastic Environmental Research & Risk Assessment, 2012, v. 26, n. 4, p. 479, doi. 10.1007/s00477-012-0572-2

By:

Porcu, Emilio;
Mateu, Jorge;
Gregori, Pablo;
Ostoja-Starzewski, Martin

Publication type:

Article

Convergence arguments to bridge cauchy and matérn covariance functions.

Published in:

Statistical Papers, 2024, v. 65, n. 2, p. 645, doi. 10.1007/s00362-023-01400-9

By:

Faouzi, Tarik;
Porcu, Emilio;
Kondrashuk, Igor;
Bevilacqua, Moreno

Publication type:

Article

Compatibility of space‐time kernels with full, dynamical, or compact support.

Published in:

Mathematical Methods in the Applied Sciences, 2025, v. 48, n. 1, p. 1216, doi. 10.1002/mma.10379

By:

Faouzi, Tarik;
Furrer, Reinhard;
Porcu, Emilio

Publication type:

Article

On a nonlinear Birnbaum–Saunders model based on a bivariate construction and its characteristics.

Published in:

Communications in Statistics: Theory & Methods, 2016, v. 45, n. 3, p. 772, doi. 10.1080/03610926.2013.851223

By:

Khosravi, Mohsen;
Leiva, Víctor;
Jamalizadeh, Ahad;
Porcu, Emilio

Publication type:

Article

Human migration from the Levant and Arabia into Yemen since Last Glacial Maximum.

Published in:

Scientific Reports, 2024, v. 14, n. 1, p. 1, doi. 10.1038/s41598-024-81615-4

By:

Henschel, Andreas;
Saif-Ali, Riyadh;
Al-Habori, Molham;
Kamarul, Syafiq Azman;
Pagani, Luca;
Al Hageh, Cynthia;
Porcu, Emilio;
Taleb, Nassim Nicolas;
Platt, Daniel;
Zalloua, Pierre

Publication type:

Article

30 Years of space–time covariance functions.

Published in:

WIREs: Computational Statistics, 2021, v. 13, n. 2, p. 1, doi. 10.1002/wics.1512

By:

Porcu, Emilio;
Furrer, Reinhard;
Nychka, Douglas

Publication type:

Article

Hybrid Parametric Classes of Isotropic Covariance Functions for Spatial Random Fields.

Published in:

Mathematical Geosciences, 2024, v. 56, n. 7, p. 1517, doi. 10.1007/s11004-023-10123-4

By:

Alegría, Alfredo;
Ramírez, Fabián;
Porcu, Emilio

Publication type:

Article

New Validity Conditions for the Multivariate Matérn Coregionalization Model, with an Application to Exploration Geochemistry.

Published in:

Mathematical Geosciences, 2022, v. 54, n. 6, p. 1043, doi. 10.1007/s11004-022-10000-6

By:

Emery, Xavier;
Porcu, Emilio;
White, Philip

Publication type:

Article

Nonstationary space–time covariance functions induced by dynamical systems.

Published in:

Scandinavian Journal of Statistics, 2022, v. 49, n. 1, p. 211, doi. 10.1111/sjos.12513

By:

Senoussi, Rachid;
Porcu, Emilio

Publication type:

Article

Advancing Space‐Time Simulation of Random Fields: From Storms to Cyclones and Beyond.

Published in:

Water Resources Research, 2021, v. 57, n. 8, p. 1, doi. 10.1029/2020WR029466

By:

Papalexiou, Simon Michael;
Serinaldi, Francesco;
Porcu, Emilio

Publication type:

Article

Random fields on the hypertorus: Covariance modeling and applications.

Published in:

Environmetrics, 2022, v. 33, n. 1, p. 1, doi. 10.1002/env.2701

By:

Porcu, Emilio;
White, Philip A.

Publication type:

Article

Discussion on A high‐resolution bilevel skew‐t stochastic generator for assessing Saudi Arabia's wind energy resources.

Published in:

Environmetrics, 2020, v. 31, n. 7, p. 1, doi. 10.1002/env.2651

By:

Porcu, Emilio;
Rysgaard, Jonas;
Eveloy, Valerie

Publication type:

Article

Space‐time autoregressive estimation and prediction with missing data based on Kalman filtering.

Published in:

Environmetrics, 2020, v. 31, n. 7, p. 1, doi. 10.1002/env.2627

By:

Padilla, Leonardo;
Lagos‐Álvarez, Bernado;
Mateu, Jorge;
Porcu, Emilio

Publication type:

Article

Fitting negative spatial covariances to geothermal field temperatures in Nea Kessani (Greece).

Published in:

Environmetrics, 2007, v. 18, n. 7, p. 759, doi. 10.1002/env.871

By:

Mateu, Jorge;
Porcu, Emilio;
Christakos, George;
Bevilacqua, Moreno

Publication type:

Article

The effect of the COVID-19 pandemic on deceased and living organ donors in the United States of America.

Published in:

Scientific Reports, 2022, v. 12, n. 1, p. 1, doi. 10.1038/s41598-022-24351-x

By:

Hantouche, Mireille;
Lara Carrion, Libia;
Porcu, Emilio;
Bramstedt, Katrina A.

Publication type:

Article

The effect of the COVID-19 pandemic on deceased and living organ donors in the United States of America.

Published in:

Scientific Reports, 2022, v. 12, n. 1, p. 1, doi. 10.1038/s41598-022-24351-x

By:

Hantouche, Mireille;
Lara Carrion, Libia;
Porcu, Emilio;
Bramstedt, Katrina A.

Publication type:

Article

Harmonic oscillator driven by random processes having fractal and Hurst effects.

Published in:

Acta Mechanica, 2015, v. 226, n. 11, p. 3653, doi. 10.1007/s00707-015-1385-4

By:

Shen, Lihua;
Ostoja-Starzewski, Martin;
Porcu, Emilio

Publication type:

Article

Retraction Note to: Application of extreme learning machine for estimation of wind speed distribution.

Published in:

Climate Dynamics, 2019, v. 53, n. 5/6, p. 3709, doi. 10.1007/s00382-018-4550-3

By:

Shamshirband, Shahaboddin;
Mohammadi, Kasra;
Tong, Chong Wen;
Petković, Dalibor;
Porcu, Emilio;
Mostafaeipour, Ali;
Ch, Sudheer;
Sedaghat, Ahmad

Publication type:

Article

Retraction Note to: Erratum to: Application of extreme learning machine for estimation of wind speed distribution.

Published in:

Climate Dynamics, 2019, v. 53, n. 3/4, p. 2483, doi. 10.1007/s00382-018-4551-2

By:

Shamshirband, Shahaboddin;
Mohammadi, Kasra;
Tong, Chong Wen;
Petković, Dalibor;
Porcu, Emilio;
Mostafaeipour, Ali;
Ch, Sudheer;
Sedaghat, Ahmad

Publication type:

Article

Application of extreme learning machine for estimation of wind speed distribution.

Published in:

Climate Dynamics, 2016, v. 46, n. 5/6, p. 1893, doi. 10.1007/s00382-015-2682-2

By:

Shamshirband, Shahaboddin;
Mohammadi, Kasra;
Tong, Chong;
Petković, Dalibor;
Porcu, Emilio;
Mostafaeipour, Ali;
Ch, Sudheer;
Sedaghat, Ahmad

Publication type:

Article

Erratum to: Application of extreme learning machine for estimation of wind speed distribution.

Published in:

2016

By:

Shamshirband, Shahaboddin;
Mohammadi, Kasra;
Tong, Chong;
Petković, Dalibor;
Porcu, Emilio;
Mostafaeipour, Ali;
Ch, Sudheer;
Sedaghat, Ahmad

Publication type:

Erratum

A stochastic fractional Laplace equation driven by colored noise on bounded domain, and its covariance functional.

Published in:

Stochastic Models, 2022, v. 38, n. 3, p. 365, doi. 10.1080/15326349.2022.2045205

By:

Piña, Nicolás;
Caraballo, Tomás;
Porcu, Emilio

Publication type:

Article

A deep look into the dagum family of isotropic covariance functions.

Published in:

Journal of Applied Probability, 2022, v. 59, n. 4, p. 1026, doi. 10.1017/jpr.2021.103

By:

Faouzi, Tarik;
Porcu, Emilio;
Kondrashuk, Igor;
Malyarenko, Anatoliy

Publication type:

Article

Rudin's extension theorems and exponential convexity for matrix- and function-valued positive semidefinite functions.

Published in:

Computational & Applied Mathematics, 2025, v. 44, n. 1, p. 1, doi. 10.1007/s40314-024-02974-2

By:

Porcu, Emilio;
Emery, Xavier;
Ferreira, Vinicius;
Zubelli, Jorge

Publication type:

Article

Integral representations, extension theorems and walks through dimensions under radial exponential convexity.

Published in:

Computational & Applied Mathematics, 2024, v. 43, n. 1, p. 1, doi. 10.1007/s40314-023-02529-x

By:

Emery, Xavier;
Porcu, Emilio

Publication type:

Article

The Schoenberg kernel and more flexible multivariate covariance models in Euclidean spaces.

Published in:

Computational & Applied Mathematics, 2023, v. 42, n. 4, p. 1, doi. 10.1007/s40314-023-02275-0

By:

Emery, Xavier;
Porcu, Emilio

Publication type:

Article

Dimension walks on hyperspheres.

Published in:

Computational & Applied Mathematics, 2022, v. 41, n. 5, p. 1, doi. 10.1007/s40314-022-01912-4

By:

Emery, Xavier;
Peron, Ana Paula;
Porcu, Emilio

Publication type:

Article

Criteria and characterizations for spatially isotropic and temporally symmetric matrix-valued covariance functions.

Published in:

Computational & Applied Mathematics, 2022, v. 41, n. 5, p. 1, doi. 10.1007/s40314-022-01930-2

By:

Porcu, Emilio;
Emery, Xavier;
Mery, Nadia

Publication type:

Article

Modeling Temporally Evolving and Spatially Globally Dependent Data.

Published in:

International Statistical Review, 2018, v. 86, n. 2, p. 344, doi. 10.1111/insr.12266

By:

Porcu, Emilio;
Alegria, Alfredo;
Furrer, Reinhard

Publication type:

Article

Compactly-Supported Isotropic Covariances on Spheres Obtained from Matrix-Valued Covariances in Euclidean Spaces.

Published in:

Constructive Approximation, 2023, v. 58, n. 1, p. 181, doi. 10.1007/s00365-022-09603-3

By:

Emery, Xavier;
Mery, Nadia;
Khorram, Farzaneh;
Porcu, Emilio

Publication type:

Article

From Schoenberg Coefficients to Schoenberg Functions.

Published in:

Constructive Approximation, 2017, v. 45, n. 2, p. 217, doi. 10.1007/s00365-016-9323-9

By:

Berg, Christian;
Porcu, Emilio

Publication type:

Article

A kernel-based method for nonparametric estimation of variograms.

Published in:

Statistica Neerlandica, 2007, v. 61, n. 2, p. 173, doi. 10.1111/j.1467-9574.2007.00326.x

By:

Keming Yu;
Mateu, Jorge;
Porcu, Emilio

Publication type:

Article