sentence-transformers safetensors roberta sentence-similarity feature-extraction generated_from_trainer dataset_size:2720 loss:MatryoshkaLoss loss:MultipleNegativesRankingLoss en arxiv:1908.10084 arxiv:2205.13147 arxiv:1705.00652 base_model:bkai-foundation-models/vietnamese-bi-encoder base_model:finetune:bkai-foundation-models/vietnamese-bi-encoder license:apache-2.0 model-index autotrain_compatible text-embeddings-inference endpoints_compatible region:us