Tags contrastive learning1 DataAug3 dense retrieval2 dual encoder1 embedding model1 finetuning1 Hard Negative Sampling3 haullcination2 LLM18 LLM Agent2 ontology-grounded1 PEFT1 prompt tuning1 RAG1 retrieval1 SFT1 text-image matching1 text-image retrieval2 text-to-text1