Legal BERTimbau Sts Base Ma

🚀 rufimelo/Legal-BERTimbau-sts-base-ma

這是一個sentence-transformers模型，它可以將句子和段落映射到一個768維的密集向量空間，可用於聚類或語義搜索等任務。rufimelo/rufimelo/Legal-BERTimbau-sts-base-ma基於Legal-BERTimbau-base，而Legal-BERTimbau-base則源自BERTimbau large。該模型適用於葡萄牙語法律領域，並在葡萄牙語數據集上針對語義文本相似度（STS）進行了訓練。

🚀 快速開始

✨ 主要特性

• 基於sentence-transformers框架，能將句子和段落映射到768維的密集向量空間。
• 適用於葡萄牙語法律領域，在葡萄牙語數據集上進行了STS訓練。
• 可用於聚類、語義搜索等任務。

📦 安裝指南

若要使用此模型，需先安裝sentence-transformers：

pip install -U sentence-transformers

💻 使用示例

基礎用法

from sentence_transformers import SentenceTransformer
sentences = ["Isto é um exemplo", "Isto é um outro exemplo"]

model = SentenceTransformer('rufimelo/Legal-BERTimbau-sts-base-ma')
embeddings = model.encode(sentences)
print(embeddings)

高級用法（HuggingFace Transformers）

from transformers import AutoTokenizer, AutoModel
import torch


#Mean Pooling - Take attention mask into account for correct averaging
def mean_pooling(model_output, attention_mask):
    token_embeddings = model_output[0] #First element of model_output contains all token embeddings
    input_mask_expanded = attention_mask.unsqueeze(-1).expand(token_embeddings.size()).float()
    return torch.sum(token_embeddings * input_mask_expanded, 1) / torch.clamp(input_mask_expanded.sum(1), min=1e-9)


# Sentences we want sentence embeddings for
sentences = ['This is an example sentence', 'Each sentence is converted']

# Load model from HuggingFace Hub
tokenizer = AutoTokenizer.from_pretrained('rufimelo/Legal-BERTimbau-sts-base-ma')
model = AutoModel.from_pretrained('rufimelo/Legal-BERTimbau-sts-base-ma')

# Tokenize sentences
encoded_input = tokenizer(sentences, padding=True, truncation=True, return_tensors='pt')

# Compute token embeddings
with torch.no_grad():
    model_output = model(**encoded_input)

# Perform pooling. In this case, mean pooling.
sentence_embeddings = mean_pooling(model_output, encoded_input['attention_mask'])

print("Sentence embeddings:")
print(sentence_embeddings)

📚 詳細文檔

評估結果（STS）

訓練信息

rufimelo/Legal-BERTimbau-sts-base-ma基於Legal-BERTimbau-base，而Legal-BERTimbau-base源自BERTimbau base。

首先，由於葡萄牙語數據集的缺乏，該模型採用多語言知識蒸餾進行訓練。在多語言知識蒸餾過程中，教師模型為'sentence-transformers/paraphrase-xlm-r-multilingual-v1'，假設支持的語言為英語，要學習的語言為葡萄牙語。

該模型針對語義文本相似度進行訓練，並在assin、assin2和stsb_multi_mt pt等數據集上進行了微調。

完整模型架構

SentenceTransformer(
  (0): Transformer({'max_seq_length': 128, 'do_lower_case': False}) with Transformer model: BertModel 
  (1): Pooling({'word_embedding_dimension': 768, 'pooling_mode_cls_token': False, 'pooling_mode_mean_tokens': True, 'pooling_mode_max_tokens': False, 'pooling_mode_mean_sqrt_len_tokens': False, 'pooling_mode_weightedmean_tokens': False, 'pooling_mode_lasttoken': False})
)

🔧 技術細節

該模型基於Sentence-Transformers框架，使用BertModel作為基礎模型，並通過池化層將詞嵌入轉換為句子嵌入。在訓練過程中，採用了多語言知識蒸餾和微調等技術，以適應葡萄牙語法律領域的語義文本相似度任務。

📄 許可證

文檔未提及相關許可證信息。

引用與作者

如果使用此模型，請引用以下文獻：

@inproceedings{souza2020bertimbau,
  author    = {F{\'a}bio Souza and
               Rodrigo Nogueira and
               Roberto Lotufo},
  title     = {{BERT}imbau: pretrained {BERT} models for {B}razilian {P}ortuguese},
  booktitle = {9th Brazilian Conference on Intelligent Systems, {BRACIS}, Rio Grande do Sul, Brazil, October 20-23 (to appear)},
  year      = {2020}
}

@inproceedings{fonseca2016assin,
  title={ASSIN: Avaliacao de similaridade semantica e inferencia textual},
  author={Fonseca, E and Santos, L and Criscuolo, Marcelo and Aluisio, S},
  booktitle={Computational Processing of the Portuguese Language-12th International Conference, Tomar, Portugal},
  pages={13--15},
  year={2016}
}

@inproceedings{real2020assin,
  title={The assin 2 shared task: a quick overview},
  author={Real, Livy and Fonseca, Erick and Oliveira, Hugo Goncalo},
  booktitle={International Conference on Computational Processing of the Portuguese Language},
  pages={406--412},
  year={2020},
  organization={Springer}
}
@InProceedings{huggingface:dataset:stsb_multi_mt,
title = {Machine translated multilingual STS benchmark dataset.},
author={Philip May},
year={2021},
url={https://github.com/PhilipMay/stsb-multi-mt}
}