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Stein hypothesis and screening effect for covariances with compact support
(Inst Mathematical Statistics, 2020)
In spatial statistics, the screening effect historically refers to the situation when the observations located far from the predict and receive a small (ideally, zero) kriging weight. Several factors play a crucial role ...
An improved spectral turning-bands algorithm for simulating stationary vector Gaussian random fields
(2016)
We propose a spectral turning-bands approach for the simulation of second-order stationary vector Gaussian random fields. The approach improves existing spectral methods through coupling with importance sampling techniques. ...
On a continuous spectral algorithm for simulating non stationary Gaussian random fields
(Springer, 2018)
This paper presents an algorithm for simulating
Gaussian random fields with zero mean and non-stationary
covariance functions. The simulated field is obtained as a
weighted sum of cosine waves with random frequencies
and ...
On a continuous spectral algorithm for simulating non-stationary Gaussian random fields
(Springer New York LLC, 2018)
This paper presents an algorithm for simulating Gaussian random fields with zero mean and non-stationary covariance functions. The simulated field is obtained as a weighted sum of cosine waves with random frequencies and ...
Modelo Lineal de Efectos Mixtos: Una aplicación a Datos Temporal y Espacialmente Correlacionados
(Departamento de EstadísticaUniversidad Nacional de Colombia - Sede Bogotá, 2019-11-15)
Modeling spatial and temporal correlation simultaneously has become a topic of interest for different contexts, especially in the geostatistical context, since the
realization of an optimal spatial prediction in sites not ...
Técnicas de inteligencia artificial utilizadas en el procesamiento de imágenes y su aplicación en el análisis de pavimentos
(Fondo Editorial EIA - Universidad EIA, 2019-01-20)
Debido al incremento en los costos de mantenimiento, rehabilitación y construcción de vías, estudiar las estructuras de pavimento para determinar su comportamiento y sus características mecánicas propias analizando la ...
Rendimiento y estado nutricional del café (Coffea arabica L.) en respuesta a aplicación de biocarbón
(Universidad Nacional de ColombiaBogotá - Ciencias Agrarias - Doctorado en Ciencias AgrariasEscuela de posgradosFacultad de Ciencias AgrariasBogotá, ColombiaUniversidad Nacional de Colombia - Sede Bogotá, 2022)
El café de Colombia es reconocido mundialmente por su sabor y aroma suave. Su cultivo genera una gran cantidad de residuos como la pulpa fresca, que conlleva a problemas medioambientales, sanitarios y económicos. La obtención ...