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dc.contributor.authorFernández Romero, Lluís
dc.contributor.authorYan, Jia
dc.contributor.authorFonollosa Magrinyà, Jordi
dc.contributor.authorBurgués, Javier
dc.contributor.authorGutierrez Galvez, Agustín
dc.contributor.authorMarco Colás, Santiago
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria de Sistemes, Automàtica i Informàtica Industrial
dc.identifier.citationFernández, L. [et al.]. A practical method to estimate the resolving power of a chemical sensor array: application to feature selection. "Frontiers in chemistry (Lausanne)", 12 Juny 2018, vol. 6, p. 209-1-209-14.
dc.description.abstractA methodology to calculate analytical figures of merit is not well established for detection systems that are based on sensor arrays with low sensor selectivity. In this work, we present a practical approach to estimate the Resolving Power of a sensory system, considering non-linear sensors and heteroscedastic sensor noise. We use the definition introduced by Shannon in the field of communication theory to quantify the number of symbols in a noisy environment, and its version adapted by Gardner and Barlett for chemical sensor systems. Our method combines dimensionality reduction and the use of algorithms to compute the convex hull of the empirical data to estimate the data volume in the sensor response space. We validate our methodology with synthetic data and with actual data captured with temperature-modulated MOX gas sensors. Unlike other methodologies, our method does not require the intrinsic dimensionality of the sensor response to be smaller than the dimensionality of the input space. Moreover, our method circumvents the problem to obtain the sensitivity matrix, which usually is not known. Hence, our method is able to successfully compute the Resolving Power of actual chemical sensor arrays. We provide a relevant figure of merit, and a methodology to calculate it, that was missing in the literature to benchmark broad-response gas sensor arrays.
dc.subjectÀrees temàtiques de la UPC::Enginyeria electrònica::Instrumentació i mesura::Sensors i actuadors
dc.subject.lcshChemical detectors
dc.subject.otherGas sensor array
dc.subject.otherMOX sensors
dc.subject.otherResolving Power
dc.subject.otherSensor resolution
dc.subject.otherDimensionality reduction
dc.subject.otherMachine olfaction
dc.titleA practical method to estimate the resolving power of a chemical sensor array: application to feature selection
dc.subject.lemacSensors químics
dc.contributor.groupUniversitat Politècnica de Catalunya. B2SLab - Bioinformatics and Biomedical Signals Laboratory
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access
dc.description.versionPostprint (published version)
local.citation.authorFernández, L.; Yan, J.; Fonollosa, J.; Burgués, J.; Gutierrez, A.; Marco, S.
local.citation.publicationNameFrontiers in chemistry (Lausanne)

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