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Real-time information processing of environmental sensor network data using bayesian gaussian processes

Published: 30 November 2012 Publication History

Abstract

In this article, we consider the problem faced by a sensor network operator who must infer, in real time, the value of some environmental parameter that is being monitored at discrete points in space and time by a sensor network. We describe a powerful and generic approach built upon an efficient multi-output Gaussian process that facilitates this information acquisition and processing. Our algorithm allows effective inference even with minimal domain knowledge, and we further introduce a formulation of Bayesian Monte Carlo to permit the principled management of the hyperparameters introduced by our flexible models. We demonstrate how our methods can be applied in cases where the data is delayed, intermittently missing, censored, and/or correlated. We validate our approach using data collected from three networks of weather sensors and show that it yields better inference performance than both conventional independent Gaussian processes and the Kalman filter. Finally, we show that our formalism efficiently reuses previous computations by following an online update procedure as new data sequentially arrives, and that this results in a four-fold increase in computational speed in the largest cases considered.

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    Published In

    cover image ACM Transactions on Sensor Networks
    ACM Transactions on Sensor Networks  Volume 9, Issue 1
    November 2012
    233 pages
    ISSN:1550-4859
    EISSN:1550-4867
    DOI:10.1145/2379799
    Issue’s Table of Contents
    Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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    Publication History

    Published: 30 November 2012
    Accepted: 01 August 2011
    Revised: 01 April 2011
    Received: 01 September 2010
    Published in TOSN Volume 9, Issue 1

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    Author Tags

    1. Gaussian processes
    2. Learning of models from data
    3. adaptive sampling
    4. information processing

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    • (2023)Data-Driven Distance Metrics for Kriging-Short-Term Urban Traffic State PredictionIEEE Transactions on Intelligent Transportation Systems10.1109/TITS.2023.325102224:6(6268-6279)Online publication date: 14-Mar-2023
    • (2023)An efficient EM algorithm for two-layer mixture model of gaussian process functional regressionsPattern Recognition10.1016/j.patcog.2023.109783143(109783)Online publication date: Nov-2023
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