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Contributed by

johngiorgi John Giorgi
3 models


Model description

This is the allenai/scibert_scivocab_uncased model, with extended pretraining on over 2 million scientific papers from S2ORC using the self-supervised training strategy presented in DeCLUTR: Deep Contrastive Learning for Unsupervised Textual Representations.

Intended uses & limitations

The model is intended to be used as a sentence encoder, similar to Google's Universal Sentence Encoder or Sentence Transformers. It is particularly suitable for scientific text.

How to use

Please see our repo for full details. A simple example is shown below.

import torch
from scipy.spatial.distance import cosine

from transformers import AutoModel, AutoTokenizer

# Load the model
tokenizer = AutoTokenizer.from_pretrained("johngiorgi/declutr-sci-base")
model = AutoModel.from_pretrained("johngiorgi/declutr-sci-base")

# Prepare some text to embed
text = [
    "Oncogenic KRAS mutations are common in cancer.",
    "Notably, c-Raf has recently been found essential for development of K-Ras-driven NSCLCs.",
inputs = tokenizer(text, padding=True, truncation=True, return_tensors="pt")

# Embed the text
with torch.no_grad():
    sequence_output, _ = model(**inputs, output_hidden_states=False)

# Mean pool the token-level embeddings to get sentence-level embeddings
embeddings = torch.sum(
    sequence_output * inputs["attention_mask"].unsqueeze(-1), dim=1
) / torch.clamp(torch.sum(inputs["attention_mask"], dim=1, keepdims=True), min=1e-9)

# Compute a semantic similarity via the cosine distance
semantic_sim = 1 - cosine(embeddings[0], embeddings[1])

BibTeX entry and citation info

  title={DeCLUTR: Deep Contrastive Learning for Unsupervised Textual Representations},
  author={John M Giorgi and Osvald Nitski and Gary D. Bader and Bo Wang},