Abstract
The article considers the possibility of quantitative determination of the selectivity of multisensor gas analyzers by applying methods of mathematical statistics on an example of a sensor system based on In2O3-Ga2O3 thin films operating in a mode with several working temperatures and in a dynamic mode with abrupt gas supply. The following methods were investigated: the quadrat sampling, the Thiessen-Voronoi polygons and the k-nearest neighbors. It is shown that the latter is the most attractive for quantitative determination of gas sensor system selectivity. The obtained results are applicable for determining the optimum ratios between the selectivity of the gas sensor system and the costs of achieving that selectivity by making improvements in the construction of sensing unit, a measuring circuit or an output signal processing unit.
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