Jurisbert Base Portuguese Sts

🚀 juridics/bertlaw-base-portuguese-sts-scale

juridics/bertlaw-base-portuguese-sts-scale是一個句子轉換器模型，它能將句子和段落映射到768維的密集向量空間，可用於聚類或語義搜索等任務。

🚀 快速開始

本模型可通過以下兩種方式使用：使用sentence-transformers庫或直接使用transformers庫。

✨ 主要特性

• 向量映射：將句子和段落映射到768維的密集向量空間。
• 多用途：可用於聚類、語義搜索等任務。

📦 安裝指南

若要使用sentence-transformers庫，需先安裝它：

pip install -U sentence-transformers

💻 使用示例

基礎用法（使用sentence-transformers庫）

from sentence_transformers import SentenceTransformer
sentences = ["This is an example sentence", "Each sentence is converted"]

model = SentenceTransformer('juridics/bertlaw-base-portuguese-sts-scale')
embeddings = model.encode(sentences)
print(embeddings)

高級用法（使用transformers庫）

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('juridics/bertlaw-base-portuguese-sts-scale')
model = AutoModel.from_pretrained('juridics/bertlaw-base-portuguese-sts-scale')

# 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

若要對本模型進行自動評估，可參考句子嵌入基準：https://seb.sbert.net

訓練

本模型的訓練參數如下：

數據加載器： torch.utils.data.dataloader.DataLoader，長度為2492，參數如下：

{'batch_size': 8, 'sampler': 'torch.utils.data.sampler.RandomSampler', 'batch_sampler': 'torch.utils.data.sampler.BatchSampler'}

損失函數： sentence_transformers.losses.CosineSimilarityLoss.CosineSimilarityLoss

fit()方法的參數：

{
    "epochs": 3,
    "evaluation_steps": 2492,
    "evaluator": "sentence_transformers.evaluation.EmbeddingSimilarityEvaluator.EmbeddingSimilarityEvaluator",
    "max_grad_norm": 1,
    "optimizer_class": "<class 'torch.optim.adamw.AdamW'>",
    "optimizer_params": {
        "lr": 5e-05
    },
    "scheduler": "WarmupLinear",
    "steps_per_epoch": null,
    "warmup_steps": 748,
    "weight_decay": 0.01
}

完整模型架構

SentenceTransformer(
  (0): Transformer({'max_seq_length': 384, '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})
)

引用與作者

如果使用本模型，請引用以下文獻：

@incollection{Viegas_2023,
	doi = {10.1007/978-3-031-36805-9_24},
	url = {https://doi.org/10.1007%2F978-3-031-36805-9_24},
	year = 2023,
	publisher = {Springer Nature Switzerland},
	pages = {349--365},
	author = {Charles F. O. Viegas and Bruno C. Costa and Renato P. Ishii},
	title = {{JurisBERT}: A New Approach that~Converts a~Classification Corpus into~an~{STS} One},
	booktitle = {Computational Science and Its Applications {\textendash} {ICCSA} 2023}
}