Fig. 3 | Scientific Reports

Fig. 3

From: Efficient field correction of low-cost particulate matter sensors using machine learning, mixed multiplicative/additive scaling and extended calibration inputs

Fig. 3

Low-cost sensor and reference station outputs: (a) reference PMx readings; (b) LCS PMx readings. The supplementary data includes: external temperature and humidity, To, and Ho, respectively, internal temperature and humidity, Ti, and Hi, respectively, as well as atmospheric pressure P; (c) utilized notation; (d) definitions of performance metrics: correlation coefficient, and RMSE.

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