Smaller BERT Embeddings (L-8_H-256_A-4)


This is one of the smaller BERT models referenced in Well-Read Students Learn Better: On the Importance of Pre-training Compact Models. The smaller BERT models are intended for environments with restricted computational resources. They can be fine-tuned in the same manner as the original BERT models. However, they are most effective in the context of knowledge distillation, where the fine-tuning labels are produced by a larger and more accurate teacher.


How to use

embeddings = BertEmbeddings.pretrained("small_bert_L8_256", "en") \
      .setInputCols("sentence", "token") \
nlp_pipeline = Pipeline(stages=[document_assembler, sentence_detector, tokenizer, embeddings])
pipeline_model =[[""]]).toDF("text"))
result = pipeline_model.transform(spark.createDataFrame(pd.DataFrame({"text": ["I love NLP"]})))
val embeddings = BertEmbeddings.pretrained("small_bert_L8_256", "en")
      .setInputCols("sentence", "token")
val pipeline = new Pipeline().setStages(Array(document_assembler, sentence_detector, tokenizer, embeddings))
val result =["I love NLP"].toDS.toDF("text")).transform(data)
import nlu

text = ["I love NLP"]
embeddings_df = nlu.load('en.embed.bert.small_L8_256').predict(text, output_level='token')


	token	en_embed_bert_small_L8_256_embeddings
      I 	[-0.7437451481819153, 0.2771262526512146, 0.34...
      love 	[-0.08792433142662048, 0.33525994420051575, 0....
      NLP 	[0.15274208784103394, -0.5481979846954346, -1....

Model Information

Model Name: small_bert_L8_256
Type: embeddings
Compatibility: Spark NLP 2.6.0+
License: Open Source
Edition: Official
Input Labels: [sentence, token]
Output Labels: [word_embeddings]
Language: [en]
Dimension: 256
Case sensitive: false

Data Source

The model is imported from