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http://dx.doi.org/10.7465/jkdi.2016.27.3.803

Spatio-temporal models for generating a map of high resolution NO2 level  

Yoon, Sanghoo (Department of Computer Science and Statistics, Daegu University)
Kim, Mingyu (WISE institute, Hankuk University of Foreign Studies)
Publication Information
Journal of the Korean Data and Information Science Society / v.27, no.3, 2016 , pp. 803-814 More about this Journal
Abstract
Recent times have seen an exponential increase in the amount of spatial data, which is in many cases associated with temporal data. Recent advances in computer technology and computation of hierarchical Bayesian models have enabled to analyze complex spatio-temporal data. Our work aims at modeling data of daily average nitrogen dioxide (NO2) levels obtained from 25 air monitoring sites in Seoul between 2003 and 2010. We considered an independent Gaussian process model and an auto-regressive model and carried out estimation within a hierarchical Bayesian framework with Markov chain Monte Carlo techniques. A Gaussian predictive process approximation has shown the better prediction performance rather than a Hierarchical auto-regressive model for the illustrative NO2 concentration levels at any unmonitored location.
Keywords
Auto-regressive model; bayesian inference; gaussian predictive process; nitrogen dioxide; space-time modelling;
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