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. Author manuscript; available in PMC: 2019 Jul 12.
Published in final edited form as: Comput Chem Eng. 2018 Mar 28;115:46–63. doi: 10.1016/j.compchemeng.2018.03.025

Table 5.

Evolving Time Horizon Analysis: Selected Model Performances for Fault 7 (easy), 8 (moderate), and 15 (challenging)

Fault Sample Bin Fault Detection Rate Optimal Feature Subset Size Accuracy False Alarm Rate AUC
Fault-7
Feed Temperature Change
20 0.80 143 0.89 0.02 0.97
40* 0.81 407 0.88 0.05 0.95
40 0.81 406 0.88 0.04 0.95
60* 0.77 348 0.87 0.02 0.95
60 0.77 320 0.87 0.03 0.95
80* 0.79 401 0.88 0.04 0.95
80 0.79 233 0.88 0.03 0.94
100 0.80 721 0.87 0.06 0.94
120* 0.83 433 0.90 0.03 0.96
120 0.83 427 0.89 0.04 0.96
Fault-8
pH Sensor Drift
20 0.79 93 0.83 0.12 0.91
40* 0.90 20 0.95 0.00 0.99
40 0.90 12 0.95 0.00 0.99
60* 0.96 89 0.98 0.00 1.00
60 0.96 82 0.98 0.00 1.00
80* 0.97 87 0.99 0.00 1.00
80 0.97 4 0.98 0.00 0.99
100* 0.98 13 0.99 0.00 0.99
100 0.98 7 0.99 0.00 0.99
120* 1.00 17 1.00 0.00 1.00
120 1.00 5 1.00 0.00 1.00
Fault-15
Contamination
20 0.66 1 0.50 1.00 1.00
40* 0.92 226 0.95 0.02 0.99
40 0.92 172 0.95 0.02 0.99
60* 0.99 523 0.99 0.00 1.00
60 0.99 268 0.99 0.00 1.00
80* 0.99 496 1.00 0.00 1.00
80 0.99 323 0.99 0.00 1.00
100* 0.99 684 0.99 0.00 1.00
100 0.99 84 0.99 0.00 1.00
120* 1.00 193 1.00 0.00 1.00
120 1.00 55 1.00 0.00 1.00