Journal
CHEMOSENSORS
Volume 9, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/chemosensors9040078
Keywords
electronic nose; drift compensation; active learning; noisy label problem; mixed Gaussian model; expected entropy
Funding
- Open Fund of Chongqing Key Laboratory of Bioperception and Intelligent Information Processing [2019002]
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This study focuses on the issue of gas sensor drift in electronic nose systems and introduces a class-label appraisal methodology and active learning framework to correct noisy labels, resulting in higher accuracy and lower computation costs compared to reference methods.
Gas sensor drift is an important issue of electronic nose (E-nose) systems. This study follows this concern under the condition that requires an instant drift compensation with massive online E-nose responses. Recently, an active learning paradigm has been introduced to such condition. However, it does not consider the noisy label problem caused by the unreliability of its labeling process in real applications. Thus, we have proposed a class-label appraisal methodology and associated active learning framework to assess and correct the noisy labels. To evaluate the performance of the proposed methodologies, we used the datasets from two E-nose systems. The experimental results show that the proposed methodology helps the E-noses achieve higher accuracy with lower computation than the reference methods do. Finally, we can conclude that the proposed class-label appraisal mechanism is an effective means of enhancing the robustness of active learning-based E-nose drift compensation.
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