Journal of Engineering and Applied Science

Table 9 Accuracy of model NBC-III

From: Grading assessment of steel bar corrosion in concrete structures based on naive Bayesian model and spontaneous magnetic flux leakage effect

Rebar condition	Rust grade	Rust rate α	β and γ range	Correct number	Accuracy
No rust	1	0≤α<0.02	0≤β<0.02 or 0≤γ<0.2	0	100.0%
Slight rust	2	0.02≤α<0.1	0.02≤β<1 or 0.2≤γ<0.4	11	91.7%
Moderate rust	3	0.1≤α<0.2	1≤β<3 or 0.4≤γ<0.9	15	83.3%
Severe rust	4	0.2≤α≤1	β≥3 or γ≥0.9	23	95.6%
Total				49	90.7%

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