Sentence Roberta Large Kor Sts

🚀 {MODEL_NAME}

{MODEL_NAME} 是一個 sentence-transformers 模型，它能夠將句子和段落映射到一個 1024 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

📦 安裝指南

若你已安裝 sentence-transformers，使用此模型將十分便捷，可通過以下命令安裝：

pip install -U sentence-transformers

💻 使用示例

基礎用法

使用 sentence-transformers 庫調用模型：

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

model = SentenceTransformer('{MODEL_NAME}')
embeddings = model.encode(sentences)
print(embeddings)

高級用法

若未安裝 sentence-transformers，可以直接使用 HuggingFace Transformers 庫調用模型。首先，將輸入數據傳入 Transformer 模型，然後對上下文詞嵌入應用合適的池化操作：

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('{MODEL_NAME}')
model = AutoModel.from_pretrained('{MODEL_NAME}')

# 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

若要對該模型進行自動化評估，請參考 Sentence Embeddings Benchmark：https://seb.sbert.net

🔧 技術細節

訓練參數

該模型的訓練參數如下：

• 數據加載器： torch.utils.data.dataloader.DataLoader，長度為 360，參數如下：

  {'batch_size': 16, '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": 4,
      "evaluation_steps": 1000,
      "evaluator": "sentence_transformers.evaluation.EmbeddingSimilarityEvaluator.EmbeddingSimilarityEvaluator",
      "max_grad_norm": 1,
      "optimizer_class": "<class 'torch.optim.adamw.AdamW'>",
      "optimizer_params": {
          "lr": 2e-05
      },
      "scheduler": "WarmupLinear",
      "steps_per_epoch": null,
      "warmup_steps": 144,
      "weight_decay": 0.01
  }
  

完整模型架構

SentenceTransformer(
  (0): Transformer({'max_seq_length': 512, 'do_lower_case': False}) with Transformer model: RobertaModel 
  (1): Pooling({'word_embedding_dimension': 1024, '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

若你想了解更多信息，請參考相關引用和作者介紹（文檔中未詳細提及）。