Multi-Resolution Filters for Massive Spatio-Temporal Data
Multi-Resolution Filters for Massive Spatio-Temporal Data
复制标题
海量时空数据的多分辨率过滤器
DOI:
10.1080/10618600.2021.1886938
复制
发表时间:
2021
影响因子:
2.4
通讯作者:
Katzfuss, Matthias
中科院分区:
文献类型:
--
作者:
Jurek, Marcin;Katzfuss, Matthias
Spatio-temporal datasets are rapidly growing in size. For example, environmental variables are measured with increasing resolution by increasing numbers of automated sensors mounted on satellites and aircraft. Using such data, which are typically noisy and incomplete, the goal is to obtain complete maps of the spatio-temporal process, together with uncertainty quantification. We focus here on real-time filtering inference in linear Gaussian state-space models. At each time point, the state is a spatial field evaluated on a very large spatial grid, making exact inference using the Kalman filter computationally infeasible. Instead, we propose a multi-resolution filter (MRF), a highly scalable and fully probabilistic filtering method that resolves spatial features at all scales. We prove that the MRF matrices exhibit a particular block-sparse multi-resolution structure that is preserved under filtering operations through time. We describe connections to existing methods, including hierarchical matrices from numerical mathematics. We also discuss inference on time-varying parameters using an approximate Rao-Blackwellized particle filter, in which the integrated likelihood is computed using the MRF. Using a simulation study and a real satellite-data application, we show that the MRF strongly outperforms competing approaches. Supplementary materials include Python code for reproducing the simulations, some detailed properties of the MRF and auxiliary theoretical results.
登录
查看更多内容
影响因子:
4.4
作者:
Bradley, Jonathan R.;Holan, Scott H.;Wikle, Christopher K.
通讯作者:
Wikle, Christopher K.
DOI:
10.3934/mbe.2014.11.573
发表时间:
2014
期刊:
Mathematical biosciences and engineering : MBE
影响因子:
--
作者:
L. Martin;G. Gilioli;Ettore Lanzarone;J. Míguez;S. Pasquali;F. Ruggeri;D. Ruiz
通讯作者:
D. Ruiz
影响因子:
0.8
作者:
M. Kanter
通讯作者:
M. Kanter
影响因子:
1.4
作者:
M. Katzfuss;Wenlong Gong
通讯作者:
M. Katzfuss;Wenlong Gong
DOI:
--
发表时间:
2011
期刊:
影响因子:
--
作者:
M. Stein
通讯作者:
M. Stein