76 citations · 424 across the 28 of their papers we have counts for
4 papers · 1 filter
Stochastic Local Interaction Model: Geostatistics without Kriging
Dionissios T. Hristopulos, Andreas Pavlides, Vasiliki D. Agou +1
Classical geostatistical methods face serious computational challenges if they are confronted with large sets of spatially distributed data. We present a simplified stochastic loca…
Stochastic Local Interaction Model with Sparse Precision Matrix for Space-Time Interpolation
Dionissios T. Hristopulos, Vasiliki D. Agou
The application of geostatistical and machine learning methods based on Gaussian processes to big space-time data is beset by the requirement for storing and numerically inverting…
Radial Covariance Functions Motivated by Spatial Random Field Models with Local Interactions
Dionissios T. Hristopulos
We derive explicit expressions for a family of radially symmetric, non-differentiable, Spartan covariance functions in that involve the modified Bessel function of t…
Non-Parametric Approximations for Anisotropy Estimation in Two-dimensional Differentiable Gaussian Random Fields
Manolis P. Petrakis, Dionissios T. Hristopulos
Spatially referenced data often have autocovariance functions with elliptical isolevel contours, a property known as geometric anisotropy. The anisotropy parameters include the til…