Simulation Of Spatial Processes Research Articles

Nadra-3D Add-On for Blender Software

Nadra-3D add-on package for Blender software is considered. This add-on allows use of Blender, TetGen, and ParaView software for data pre/post processing for finite element solver Nadra-3D, designed for simulation of spatial processes of filtration, heat transfer, and changes of the stress---strain state of multicomponent media.

Distribution of Increases in Residual Log Likelihood for Nested Spatial Models

Here we review nested relationships between models in the Matérn family of spatial models. The problem of comparing nested statistical models is straightforward in regular parametric problems via the likelihood ratio statistics and its asymptotic distribution. Here we examine the distribution of increments in residual log likelihood between nested spatial models when the null hypothesis is that the spatial structure is a convex combination of white noise and the de Wijs process, also known by its logarithmic covariance function. This study is carried out by simulation of spatial processes and the important aspects of this work include how to simulate a spatial process of order 0, the lack of strong bias in the estimates of variance components, and the validity of the usual asymptotic results for nested spatial models examined here.

A New Stage in the Global Biosphere Project : the Simulation of Spatial Processes and of Structural Change

A stage has been reached in the Global Biosphere Project in which the explicit representation of structural change as well as of geographic location patterns requires a shift to discrete event simulation algorithms.