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• W2995890446 abstract "This paper addresses the problem of detecting anomalous activity in traffic networks where the network is not directly observed. Given knowledge of what the node-to-node traffic in a network should be, any activity that differs significantly from this baseline would be considered anomalous. We propose a Bayesian hierarchical model for estimating the traffic rates and detecting anomalous changes in the network. The probabilistic nature of the model allows us to perform statistical goodness-of-fit tests to detect significant deviations from a baseline network. We show that due to the more defined structure of the hierarchical Bayesian model, such tests perform well even when the empirical models estimated by the EM algorithm are misspecified. We apply our model to both simulated and real datasets to demonstrate its superior performance over existing alternatives." @default.
• W2995890446 created "2019-12-26" @default.
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• W2995890446 date "2019-03-01" @default.
• W2995890446 modified "2023-09-26" @default.
• W2995890446 title "Anomaly Detection in Partially Observed Traffic Networks" @default.
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• W2995890446 doi "https://doi.org/10.1109/tsp.2019.2892026" @default.
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