Edit model card

KoRean based ELECTRA (KR-ELECTRA)

This is a release of a Korean-specific ELECTRA model with comparable or better performances developed by the Computational Linguistics Lab at Seoul National University. Our model shows remarkable performances on tasks related to informal texts such as review documents, while still showing comparable results on other kinds of tasks.

Released Model

We pre-trained our KR-ELECTRA model following a base-scale model of ELECTRA. We trained the model based on Tensorflow-v1 using a v3-8 TPU of Google Cloud Platform.

Model Details

We followed the training parameters of the base-scale model of ELECTRA.

Hyperparameters
model # of layers embedding size hidden size # of heads
Discriminator 12 768 768 12
Generator 12 768 256 4
Pretraining
batch size train steps learning rates max sequence length generator size
256 700000 2e-4 128 0.33333

Training Dataset

34GB Korean texts including Wikipedia documents, news articles, legal texts, news comments, product reviews, and so on. These texts are balanced, consisting of the same ratios of written and spoken data.

Vocabulary

vocab size 30,000 We used morpheme-based unit tokens for our vocabulary based on the Mecab-Ko morpheme analyzer.

Download Link

  • Tensorflow-v1 model (download)

  • PyTorch models on HuggingFace

from transformers import ElectraModel, ElectraTokenizer

model = ElectraModel.from_pretrained("snunlp/KR-ELECTRA-discriminator")
tokenizer = ElectraTokenizer.from_pretrained("snunlp/KR-ELECTRA-discriminator")

Finetuning

We used and slightly edited the finetuning codes from KoELECTRA, with additionally adjusted hyperparameters. You can download the codes and config files that we used for our model from our github.

Experimental Results

NSMC
(acc)
Naver NER
(F1)
PAWS
(acc)
KorNLI
(acc)
KorSTS
(spearman)
Question Pair
(acc)
KorQuaD (Dev)
(EM/F1)
Korean-Hate-Speech (Dev)
(F1)
KoBERT 89.59 87.92 81.25 79.62 81.59 94.85 51.75 / 79.15 66.21
XLM-Roberta-Base 89.03 86.65 82.80 80.23 78.45 93.80 64.70 / 88.94 64.06
HanBERT 90.06 87.70 82.95 80.32 82.73 94.72 78.74 / 92.02 68.32
KoELECTRA-Base 90.33 87.18 81.70 80.64 82.00 93.54 60.86 / 89.28 66.09
KoELECTRA-Base-v2 89.56 87.16 80.70 80.72 82.30 94.85 84.01 / 92.40 67.45
KoELECTRA-Base-v3 90.63 88.11 84.45 82.24 85.53 95.25 84.83 / 93.45 67.61
KR-ELECTRA (ours) 91.168 87.90 82.05 82.51 85.41 95.51 84.93 / 93.04 74.50

The baseline results are brought from KoELECTRA's.

Citation

@misc{kr-electra,
  author = {Lee, Sangah and Hyopil Shin},
  title = {KR-ELECTRA: a KoRean-based ELECTRA model},
  year = {2022},
  publisher = {GitHub},
  journal = {GitHub repository},
  howpublished = {\url{https://github.com/snunlp/KR-ELECTRA}}
}
Downloads last month
118
Unable to determine this model’s pipeline type. Check the docs .