Tags contrastive learning1 DataGen4 dense retrieval2 dual encoder1 embedding metric1 embedding model1 finetuning1 Hard Negative Sampling3 haullcination2 LLM20 LLM Agent2 LoRA1 Matryoshka representaion learning2 MLLM6 ontology-grounded1 PEFT2 prompt tuning1 RAG1 representation learning7 retrieval4 SFT1 text-image matching1 text-image retrieval9 text-text retrieval4 text-to-text1