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Drift in a Popular Metal Oxide Sensor Dataset Reveals Limitations for Gas Classification Benchmarks
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Drift in a popular metal oxide sensor dataset reveals limitations for gas classification benchmarks
Dennler, Nik; Rastogi, Shavika (S36339); Fonollosa, Jordi. - : Netherlands, Elsevier, 2022
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Drift in a Popular Metal Oxide Sensor Dataset Reveals Limitations for Gas Classification Benchmarks ...
Abstract: Metal oxide (MOx) electro-chemical gas sensors are a sensible choice for many applications, due to their tunable sensitivity, their space-efficiency and their low price. Publicly available sensor datasets streamline the development and evaluation of novel algorithm and circuit designs, making them particularly valuable for the Artificial Olfaction / Mobile Robot Olfaction community. In 2013, Vergara et al. published a dataset comprising 16 months of recordings from a large MOx gas sensor array in a wind tunnel, which has since become a standard benchmark in the field. Here we report a previously undetected property of the dataset that limits its suitability for gas classification studies. The analysis of individual measurement timestamps reveals that gases were recorded in temporally clustered batches. The consequential correlation between the sensor response before gas exposure and the time of recording is often sufficient to predict the gas used in a given trial. Even if compensated by ... : 12 pages, 3 figures ...
Keyword: Data Analysis, Statistics and Probability physics.data-an; FOS Electrical engineering, electronic engineering, information engineering; FOS Physical sciences; Signal Processing eess.SP
URL: https://dx.doi.org/10.48550/arxiv.2108.08793
https://arxiv.org/abs/2108.08793
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