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. Author manuscript; available in PMC: 2020 May 30.
Published in final edited form as: J Environ Manage. 2018 Dec 26;233:489–498. doi: 10.1016/j.jenvman.2018.12.060

Table 3.

Comparison of model performance statistics for CMAQ, VNA, eVNA and DS using ten-fold cross validation

Performance 2013 2015
CMAQ VNA eVNA DS CMAQ VNA eVNA DS
total R2 0.63 0.90 0.86 0.89 0.70 0.86 0.82 0.83
RMSE 13.1 6.0 7.4 6.3 9.8 4.2 4.9 4.7
NMB (%) 4.8 1.4 −2.1 1.4 −18.4 0.7 −0.6 0.3
slope 0.89 0.92 0.95 0.91 1.01 0.89 0.90 0.83