Search Results for author: Sathappan Muthiah

Found 4 papers, 1 papers with code

Scrutinizing Shipment Records To Thwart Illegal Timber Trade

no code implementations31 Jul 2022 Debanjan Datta, Sathappan Muthiah, John Simeone, Amelia Meadows, Naren Ramakrishnan

The task of finding such fraudulent activities using trade data, in the absence of ground truth, can be modelled as an unsupervised anomaly detection problem.

Contrastive Learning Unsupervised Anomaly Detection

Detecting Anomalies Through Contrast in Heterogeneous Data

no code implementations2 Apr 2021 Debanjan Datta, Sathappan Muthiah, Naren Ramakrishnan

Among other challenges annotations are unavailable for our large-scale trade data with heterogeneous features (categorical and continuous), that can assist in building automated systems to detect fraudulent transactions.

Contrastive Learning Unsupervised Anomaly Detection

Hierarchical Quickest Change Detection via Surrogates

no code implementations31 Mar 2016 Prithwish Chakraborty, Sathappan Muthiah, Ravi Tandon, Naren Ramakrishnan

We propose hierarchical quickest change detection (HQCD), a framework that formalizes the process of incorporating additional correlated sources for early changepoint detection.

Change Detection Time Series +1

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