Machine olfaction using time scattering of sensor multiresolution graphs
This work addresses a domain-specific problem in machine olfaction for gas classification, representing an incremental improvement over existing methods.
The paper tackles the problem of classifying gas type and origin location from sensor array data by constructing a learning architecture that uses wavelet decomposition on sensor graphs and scattering networks to create discriminative features. The method outperforms previous classical machine learning techniques in machine olfaction experiments.
In this paper we construct a learning architecture for high dimensional time series sampled by sensor arrangements. Using a redundant wavelet decomposition on a graph constructed over the sensor locations, our algorithm is able to construct discriminative features that exploit the mutual information between the sensors. The algorithm then applies scattering networks to the time series graphs to create the feature space. We demonstrate our method on a machine olfaction problem, where one needs to classify the gas type and the location where it originates from data sampled by an array of sensors. Our experimental results clearly demonstrate that our method outperforms classical machine learning techniques used in previous studies.