Table 2 Impact of features on recall for each different class.
From: A document processing pipeline for annotating chemical entities in scientific documents
Class recall (%) | ||||||||
|---|---|---|---|---|---|---|---|---|
Feature | Multiple | Family | Abbrev | System | Formula | Identifier | Trivial | |
Conjunctions (all features) | 42.02 | 82.22 | 81.09 | 90.21 | 79.60 | 73.08 | 91.46 | |
Base | Token | +1.06 | -0.19 | +0.55 | -0.09 | -0.15 | 0.00 | +0.07 |
Lemma | +5.32 | -2.25 | -1.46 | -2.95 | -1.16 | -4.85 | -1.87 | |
Linguistic | POS | -18.62 | -12.65 | -10.93 | -13.88 | -16.65 | -24.88 | -9.61 |
Chunk | -22.87 | -6.68 | -4.34 | -4.91 | -6.14 | -12.83 | -3.13 | |
Dependency | 0.00 | -3.72 | -3.76 | -1.44 | -4.45 | -9.39 | -2.52 | |
Capitalization | -0.53 | +0.43 | +0.15 | +0.26 | +0.31 | -0.94 | +0.30 | |
Orthographic | Counting | 0.00 | +0.24 | -0.27 | +0.16 | -0.12 | -1.72 | +0.26 |
Symbols | -1.06 | -0.12 | -0.11 | 0.00 | -0.24 | -0.16 | +0.01 | |
Char n-grams | +1.60 | -2.51 | -0.64 | -0.43 | -1.35 | +4.07 | +0.47 | |
Morphological | Suffix | +1.06 | -0.09 | -0.33 | +0.16 | +0.51 | +0.63 | -0.27 |
Prefix | 0.00 | -0.64 | -0.09 | +0.10 | -0.05 | +0.31 | +0.22 | |
Word shape | +1.60 | -0.07 | -0.97 | -0.18 | -1.47 | -2.50 | -0.57 | |
Lexicons | Chemicals | +2.66 | -0.19 | -2.10 | -0.78 | -0.75 | -10.95 | -2.34 |