Forecasting in geophysical time series is a challenging problem with numerous applications. The presence of correlation (i.e. spatial correlation across several sites and time correlation within each site) poses difficulties with respect to traditional modeling, computation and statistical theory. This paper presents a cluster-centric forecasting methodology that allows us to yield a characterization of correlation in geophysical time series through a spatio-temporal clustering step. The clustering phase is designed for partitioning time series of numeric data routinely sampled at specific space locations. A forecasting model is then computed by resorting to multivariate time series analysis, in order to predict the future values of a time series by utilizing not only its own historical values, but also information from other cluster-time series. Experimental results highlight the importance of dealing with both temporal and spatial correlation and validate the proposed cluster-centric strategy in the computation of a multivariate time series forecasting model.
Using multiple time series analysis for geosensor data forecasting
PRAVILOVIC, SONJA;BILANCIA, Massimo;APPICE, ANNALISA;MALERBA, Donato
2017-01-01
Abstract
Forecasting in geophysical time series is a challenging problem with numerous applications. The presence of correlation (i.e. spatial correlation across several sites and time correlation within each site) poses difficulties with respect to traditional modeling, computation and statistical theory. This paper presents a cluster-centric forecasting methodology that allows us to yield a characterization of correlation in geophysical time series through a spatio-temporal clustering step. The clustering phase is designed for partitioning time series of numeric data routinely sampled at specific space locations. A forecasting model is then computed by resorting to multivariate time series analysis, in order to predict the future values of a time series by utilizing not only its own historical values, but also information from other cluster-time series. Experimental results highlight the importance of dealing with both temporal and spatial correlation and validate the proposed cluster-centric strategy in the computation of a multivariate time series forecasting model.File | Dimensione | Formato | |
---|---|---|---|
1-s2.0-S0020025516315067-main.pdf
non disponibili
Tipologia:
Documento in Versione Editoriale
Licenza:
NON PUBBLICO - Accesso privato/ristretto
Dimensione
2.38 MB
Formato
Adobe PDF
|
2.38 MB | Adobe PDF | Visualizza/Apri Richiedi una copia |
Using Multiple Time Series Analysis for Geosensor Data Forecasting_PreprintIRIS.pdf
accesso aperto
Descrizione: Versione accettata del paper con doi={https://doi.org/10.1016/j.ins.2016.11.001} prodotta per essere archiviata in Institutional Repository
Tipologia:
Documento in Post-print
Licenza:
Creative commons
Dimensione
4.63 MB
Formato
Adobe PDF
|
4.63 MB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.