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Developing effective biomedical retrieval models is important for excelling at knowledge-intensive biomedical tasks but still challenging due to the deficiency of sufficient publicly annotated biomedical data and computational resources. We…

Computation and Language · Computer Science 2024-10-07 Ran Xu , Wenqi Shi , Yue Yu , Yuchen Zhuang , Yanqiao Zhu , May D. Wang , Joyce C. Ho , Chao Zhang , Carl Yang

In this demo we present a web-based application for selecting an effective pre-trained dense retriever to use on a private collection. Our system, DenseQuest, provides unsupervised selection and ranking capabilities to predict the best…

Information Retrieval · Computer Science 2024-07-10 Ekaterina Khramtsova , Teerapong Leelanupab , Shengyao Zhuang , Mahsa Baktashmotlagh , Guido Zuccon

Dense retrieval is a crucial task in Information Retrieval (IR), serving as the basis for downstream tasks such as re-ranking and augmenting generation. Recently, large language models (LLMs) have demonstrated impressive semantic…

Information Retrieval · Computer Science 2025-08-20 Hengran Zhang , Keping Bi , Jiafeng Guo , Xiaojie Sun , Shihao Liu , Daiting Shi , Dawei Yin , Xueqi Cheng

Large language models (LLMs) have demonstrated strong effectiveness and robustness while fine-tuned as dense retrievers. However, their large parameter size brings significant inference time computational challenges, including high encoding…

Computation and Language · Computer Science 2025-06-04 Xueguang Ma , Xi Victoria Lin , Barlas Oguz , Jimmy Lin , Wen-tau Yih , Xilun Chen

We recently developed SLM, a joint speech and language model, which fuses a pretrained foundational speech model and a large language model (LLM), while preserving the in-context learning capability intrinsic to the pretrained LLM. In this…

Computation and Language · Computer Science 2024-02-08 Mingqiu Wang , Izhak Shafran , Hagen Soltau , Wei Han , Yuan Cao , Dian Yu , Laurent El Shafey

Cross-lingual context retrieval (extracting contextual information in one language based on requests in another) is a fundamental aspect of cross-lingual alignment, but the performance and mechanism of it for large language models (LLMs)…

Computation and Language · Computer Science 2025-10-21 Changjiang Gao , Hankun Lin , Xin Huang , Xue Han , Junlan Feng , Chao Deng , Jiajun Chen , Shujian Huang

User Simulators play a pivotal role in training and evaluating task-oriented dialogue systems. Traditional user simulators typically rely on human-engineered agendas, resulting in generated responses that often lack diversity and…

Computation and Language · Computer Science 2024-05-24 Xiang Luo , Zhiwen Tang , Jin Wang , Xuejie Zhang

Verifiable generation aims to let the large language model (LLM) generate text with supporting documents, which enables the user to flexibly verify the answer and makes the LLM's output more reliable. Retrieval plays a crucial role in…

Computation and Language · Computer Science 2024-03-28 Xiaonan Li , Changtai Zhu , Linyang Li , Zhangyue Yin , Tianxiang Sun , Xipeng Qiu

Recent advancements in Large Language Models (LLMs) have yielded remarkable success across diverse fields. However, handling long contexts remains a significant challenge for LLMs due to the quadratic time and space complexity of attention…

Computation and Language · Computer Science 2024-09-02 Weijie Liu , Zecheng Tang , Juntao Li , Kehai Chen , Min Zhang

The recent success of large language models (LLMs) has shown great potential to develop more powerful conversational recommender systems (CRSs), which rely on natural language conversations to satisfy user needs. In this paper, we embark on…

Computation and Language · Computer Science 2024-06-21 Xiaolei Wang , Xinyu Tang , Wayne Xin Zhao , Jingyuan Wang , Ji-Rong Wen

Large language models (LLMs) such as ChatGPT can produce coherent, cohesive, relevant, and fluent answers for various natural language processing (NLP) tasks. Taking document-level machine translation (MT) as a testbed, this paper provides…

Computation and Language · Computer Science 2023-10-25 Longyue Wang , Chenyang Lyu , Tianbo Ji , Zhirui Zhang , Dian Yu , Shuming Shi , Zhaopeng Tu

Current methods for Video Moment Retrieval (VMR) struggle to align complex situations involving specific environmental details, character descriptions, and action narratives. To tackle this issue, we propose a Large Language Model-guided…

Computer Vision and Pattern Recognition · Computer Science 2024-05-22 Weijia Liu , Bo Miao , Jiuxin Cao , Xuelin Zhu , Bo Liu , Mehwish Nasim , Ajmal Mian

Large Language Models (LLMs) excel in language comprehension and generation but are prone to hallucinations, producing factually incorrect or unsupported outputs. Retrieval Augmented Generation (RAG) systems address this issue by grounding…

Information Retrieval · Computer Science 2025-04-09 Chandana Sree Mala , Gizem Gezici , Fosca Giannotti

Retrieval models based on dense representations in semantic space have become an indispensable branch for first-stage retrieval. These retrievers benefit from surging advances in representation learning towards compressive global…

Computation and Language · Computer Science 2023-03-06 Kai Zhang , Chongyang Tao , Tao Shen , Can Xu , Xiubo Geng , Binxing Jiao , Daxin Jiang

Large language models have shown good performances in generating code to meet human requirements. However, human requirements expressed in natural languages can be vague, incomplete, and ambiguous, leading large language models to…

Software Engineering · Computer Science 2023-11-02 Zejun Wang , Jia Li , Ge Li , Zhi Jin

This paper presents ChatCounselor, a large language model (LLM) solution designed to provide mental health support. Unlike generic chatbots, ChatCounselor is distinguished by its foundation in real conversations between consulting clients…

Computation and Language · Computer Science 2023-09-28 June M. Liu , Donghao Li , He Cao , Tianhe Ren , Zeyi Liao , Jiamin Wu

Dense retrieval in most industries employs dual-tower architectures to retrieve query-relevant documents. Due to online deployment requirements, existing real-world dense retrieval systems mainly enhance performance by designing negative…

Dense retrieval methods have shown great promise over sparse retrieval methods in a range of NLP problems. Among them, dense phrase retrieval-the most fine-grained retrieval unit-is appealing because phrases can be directly used as the…

Computation and Language · Computer Science 2021-09-17 Jinhyuk Lee , Alexander Wettig , Danqi Chen

Building an intelligent dialogue system with the ability to select a proper response according to a multi-turn context is a great challenging task. Existing studies focus on building a context-response matching model with various neural…

Computation and Language · Computer Science 2020-09-15 Ruijian Xu , Chongyang Tao , Daxin Jiang , Xueliang Zhao , Dongyan Zhao , Rui Yan

Large Language Models (LLMs) have made significant progress in open-ended dialogue, yet their inability to retain and retrieve relevant information from long-term interactions limits their effectiveness in applications requiring sustained…