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Table 6 Performance results in our post-challenge improved system for the CEM subtask in the BioCreative IV CHEMDNER competition.

From: A CRF-based system for recognizing chemical entity mentions (CEMs) in biomedical literature

  Run 1 Run 2 Run 3 Run 4 Run 5
cost 22 22 2 2 20
TP 18,025 19,259 19,389 19,495 19,355
FP 2,312 2,671 2,537 2,694 2,505
FN 7,326 6,092 5,962 5,856 5,996
Precision(%) 88.63 87.82 88.43 87.86 88.54
Recall(%) 71.10 75.97 76.48 76.90 76.35
F1 score(%) 78.91 81.47 82.02 82.02 81.99
ABBREVIATION 59.77 63.37 64.28 65.85 65.98
FAMILY 72.36 73.55 72.92 73.94 72.97
FORMULA 73.02 73.45 74.12 74.01 74.30
IDENTIFIER 64.72 63.35 66.67 64.33 66.86
MULTIPLE 23.62 32.16 35.18 33.17 30.65
SYSTEMATIC 79.19 82.86 83.25 83.22 82.56
TRIVIAL 71.41 81.76 82.38 82.70 81.56
NO CLASS 53.66 63.41 63.41 68.29 63.41