---
library_name: zeroshot_classifier
tags:
  - transformers
  - sentence-transformers
  - zeroshot_classifier
license: mit
datasets:
  - claritylab/UTCD
language:
  - en
pipeline_tag: zero-shot-classification
metrics:
  - accuracy
---

# Zero-shot Explicit Bi-Encoder

This is a [sentence-transformers](https://www.SBERT.net) model. 
It was introduced in the Findings of ACL'23 Paper **Label Agnostic Pre-training for Zero-shot Text Classification** by ***Christopher Clarke, Yuzhao Heng, Yiping Kang, Krisztian Flautner, Lingjia Tang and Jason Mars***. 
The code for training and evaluating this model can be found [here](https://github.com/ChrisIsKing/zero-shot-text-classification/tree/master). 


## Model description

This model is intended for zero-shot text classification. 
It was trained under the dual encoding classification framework via explicit training with the aspect-normalized [UTCD](https://huggingface.co/datasets/claritylab/UTCD) dataset. 

- **Finetuned from model:** [`bert-base-uncased`](https://huggingface.co/bert-base-uncased)


## Usage

You can use the model like this:

```python
>>> from sentence_transformers import SentenceTransformer, util as sbert_util
>>> model = SentenceTransformer(model_name_or_path='claritylab/zero-shot-explicit-bi-encoder')

>>> text = "I'd like to have this track onto my Classical Relaxations playlist."
>>> labels = [
>>>     'Add To Playlist', 'Book Restaurant', 'Get Weather', 'Play Music', 'Rate Book', 'Search Creative Work',
>>>     'Search Screening Event'
>>> ]

>>> text_embed = model.encode(text)
>>> label_embeds = model.encode(labels)
>>> scores = [sbert_util.cos_sim(text_embed, lb_embed).item() for lb_embed in label_embeds]
>>> print(scores)

[
  0.53502357006073,
  0.051911696791648865,
  0.0546676367521286,
  0.5633962750434875,
  0.28765711188316345,
  0.17751818895339966,
  0.18489906191825867
]
```