Essays about: "Spatial Covariance Matrix"
Found 4 essays containing the words Spatial Covariance Matrix.
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1. Reconstruction of past European land cover from pollen data: using spatial statistics and Crank-Nicolson Monte Carlo
University essay from Lunds universitet/Matematisk statistikAbstract : Given a pollen data set from Europe over a time period, the aim is to reconstruct the past land cover by interpolating from the pollen data values to a continuous map. The data is on compositional form with three vegetation categories; coniferous forest, broadleaved forest and open land. READ MORE
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2. An Empirical Investigation of the Merits of a Class of Analytically Tractable Matern Covariance Structures in Spatial Data Analysis
University essay from Högskolan Dalarna/MikrodataanalysAbstract : I investigate, using the R package spaMM, the effect of misspecification of the smoothing parameter, Q, of the Matern covariance structure on the mean part of hierarchical generalised linear models (HGLMs) with spatially correlated Gaussian Matern random effects. In particular, by restricting Q to the set {0.5, 1.5, 2. READ MORE
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3. Likelihood ratio tests of separable or double separable covariance structure, and the empirical null distribution
University essay from Matematiska institutionenAbstract : The focus in this thesis is on the calculations of an empirical null distributionfor likelihood ratio tests testing either separable or double separable covariancematrix structures versus an unstructured covariance matrix. These calculationshave been performed for various dimensions and sample sizes, and are comparedwith the asymptotic χ2-distribution that is commonly used as an approximative distribution. READ MORE
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4. Matched Field Beamforming applied to Sonar Data
University essay from Institutionen för systemteknikAbstract : Two methods for evaluating and improving plane wave beamforming have beendeveloped. The methods estimate the shape of the wavefront and use theinformation in the beamforming. READ MORE
