Figure 1.
MLT-NER structure diagram
Figure 2.
Words and meanings in How Net
TABLE I.
Example of comprehensive description of domain entity categories
| Entity Category | Comprehensive description of entity category |
|---|---|
| color | Yellow green blue, environment-friendly color, hue, lightness, saturation and various phenomena of light |
| Environmental-friendly | Characteristic value, protection, positive evaluation, low carbon, energy conservation and emission reduction, life, agriculture, circular economy, wind and solar power generation |
| O | General text |
Figure 3.
Structure diagram of entity recognition model
Figure 4.
Example of entity recognition
Figure 5.
Entity classification model
TABLE II.
Experimental parameters
| Parameter | Value |
|---|---|
| Optimizer | SGD |
| Learning rate | 5e–6 |
| Activate function | ReLU |
| Entity category length limit | 16 |
| Enter length limit | 128 |
| Batch size | 6 |
| Deep learning framework | Pytorch |
| Number of GPUs | 1 |
TABLE III.
MSRA dataset model indicators
| MSRA | |||
|---|---|---|---|
| Model | P (%) | R (%) | F1 (%) |
| BiLSTM-CRF | 87.47 | 85.23 | 83.34 |
| BERT-BiLSTM-CRF | 95.15 | 94.85 | 95.00 |
| BERT-MRC | 96.28 | 95.74 | 96.01 |
| MTL-NER | 97.07 | 96.43 | 96.75 |
TABLE IV.
OntoNotes4.0 dataset model indicators
| OntoNotes4.0 | |||
|---|---|---|---|
| Model | P (%) | R (%) | F1 (%) |
| BiLSTM-CRF | 73.45 | 60.07 | 61.71 |
| BERT-BiLSTM-CRF | 79.23 | 79.58 | 79.40 |
| BERT-MRC | 82.49 | 81.23 | 81.56 |
| MTL-NER | 84.87 | 82.56 | 83.70 |
TABLE V.
CLUENER2020 dataset model indicators
| CLUENER2020 | |||
|---|---|---|---|
| Model | P (%) | R (%) | F1 (%) |
| BiLSTM-CRF | 67.23 | 65.42 | 66.31 |
| BERT-BiLSTM-CRF | 77.42 | 78.15 | 77.78 |
| BERT-MRC | 79.04 | 80.26 | 79.65 |
| MTL-NER | 82.14 | 80.79 | 81.46 |
TABLE VI.
CMEeE dataset model indicators
| CMeEE | |||
|---|---|---|---|
| Model | P (%) | R (%) | F1 (%) |
| BiLSTM-CRF | 56.41 | 49.52 | 52.74 |
| BERT-BiLSTM-CRF | 68.98 | 66.25 | 67.59 |
| BERT-MRC | 71.26 | 69.34 | 70.29 |
| MTL-NER | 73.13 | 70.68 | 71.89 |
Figure 6.
MSRA dataset dropout
Figure 7.
OntoNotes4.0 dataset dropout
Figure 8.
CLUENER2020 dataset dropout
Figure 9.
CMeEE dataset dropout