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Table 2 F scores (at confidence threshold of 0.3) and Mean Average Precision (MAP) values for Figs. 1–5.

From: Cascaded classifiers for confidence-based chemical named entity recognition

Corpus System MAP F
Chemistry Full 87.1% 80.8%
Chemistry No Rescorer 86.8% 81.0%
Chemistry No Preclassifier 82.7% 74.8%
Chemistry No n-Grams 79.2% 72.2%
Chemistry Custom LingPipe 75.9% 74.6%
Chemistry Pure LingPipe 66.9% 63.2%
Chemistry No Overlaps 82.9% 80.8%
Chemistry CM 87.0% 81.2%
Chemistry RN 74.5% 73.4%
Chemistry CJ 90.0% 92.0%
Chemistry ASE 17.4% 36.2%
PubMed Full 86.1% 83.2%
PubMed No Rescorer 83.3% 79.1%
PubMed No Preclassifier 81.4% 73.4%
PubMed No n-Grams 77.6% 70.6%
PubMed Custom LingPipe 78.6% 75.6%
PubMed Pure LingPipe 71.9% 66.1%
PubMed CM 85.6% 82.3%
PubMed RN 95.3% 93.2%
PubMed CJ 78.7% 83.1%
PubMed ASE 83.4% 86.0%