chinese-ner-pytorch
---
本项目是一个简单的采用`pytorch`框架的中文命名实体识别demo,主要是为了熟悉NER中两种常见的经典模型:`lstm`和`lstm+crf`,以及`BERT`预训练模型,代码中在必要的地方都有详细的注释,希望对有相关需求的人有帮助
### 数据集
数据集采用的是经典的`MSRA`数据集,[下载地址](https://www.cluebenchmarks.com/dataSet_search_modify.html?keywords=%E5%91%BD%E5%90%8D%E5%AE%9E%E4%BD%93%E8%AF%86%E5%88%AB),总共包括训练集、验证集和测试集,它们的数据规模如下:
- 训练集: 42000
- 验证集: 3000
- 测试集: 3442
### 模型
主要测试了三种模型:
- `lstm`:(经典的NER模型)
- `lstm + crf`:(大多数实验表明,加了CRF之后效果会更好)
- `BERT`:(预训练模型出来之后的SOTA模型)
### 结果
以下结果只是初步跑了一遍模型,没有对模型进行各种花式的调参,得到的F1值并不高,因为本项目的主要目的也只是为了熟悉下NER任务中两种常用的模型,所以就没有进一步采用其它tricks来提分;
| 模型 | Precision | Recall | F1 |
| -------- | --------- | ------ | ----- |
| Lstm | 73.83 | 79.43 | 76.45 |
| lstm+CRF | 74.32 | 79.45 | 76.68 |
| BERT | 78.01 | 82.11 | 79.94 |
> BERT这一类预训练模型的拟合能力真的很强,只训练了5个epcoh就基本收敛了,所以没有继续训练下去(如果调整学习率继续的话应该还会涨点分)
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基于Pytorch框架的中文命名实体识别(NER)模型,包含lstm和Bert两种模型的实现.zip
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2024-05-22
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基于Pytorch框架的中文命名实体识别(NER)模型,包含lstm和Bert两种模型的实现
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