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In this paper, we identify a critical problem, "lost-in-retrieval", in retrieval-augmented multi-hop question answering (QA): the key entities are missed in LLMs' sub-question decomposition. "Lost-in-retrieval" significantly degrades the…

Computation and Language · Computer Science 2025-05-29 Rongzhi Zhu , Xiangyu Liu , Zequn Sun , Yiwei Wang , Wei Hu

Retrieval-Augmented Generation (RAG) effectively enhances Large Language Models (LLMs) by incorporating retrieved external knowledge into the generation process. Reasoning models improve LLM performance in multi-hop QA tasks, which require…

Computation and Language · Computer Science 2026-01-21 Guo Chen , Junjie Huang , Huaijin Xie , Fei Sun , Tao Jia

Question-answering (QA) that comes naturally to humans is a critical component in seamless human-computer interaction. It has emerged as one of the most convenient and natural methods to interact with the web and is especially desirable in…

Computation and Language · Computer Science 2022-11-15 Deepak Gupta

Domain-specific QA systems require not just generative fluency but high factual accuracy grounded in structured expert knowledge. While recent Retrieval-Augmented Generation (RAG) frameworks improve context recall, they struggle with…

Computation and Language · Computer Science 2025-05-26 David Osei Opoku , Ming Sheng , Yong Zhang

Multilingual Retrieval-Augmented Generation (mRAG) systems often exhibit a perceived preference for high-resource languages, particularly English, resulting in the widespread adoption of English pivoting. While prior studies attribute this…

Computation and Language · Computer Science 2026-04-14 Jeonghyun Park , Byeongjeong Kim , Seojin Hwang , Hwanhee Lee

Retrieval-Augmented Generation (RAG) has gained significant attention in recent years for its potential to enhance natural language understanding and generation by combining large-scale retrieval systems with generative models. RAG…

Computation and Language · Computer Science 2025-03-18 Mingyue Cheng , Yucong Luo , Jie Ouyang , Qi Liu , Huijie Liu , Li Li , Shuo Yu , Bohou Zhang , Jiawei Cao , Jie Ma , Daoyu Wang , Enhong Chen

Multimodal learning with incomplete modality is practical and challenging. Recently, researchers have focused on enhancing the robustness of pre-trained MultiModal Transformers (MMTs) under missing modality conditions by applying learnable…

Computer Vision and Pattern Recognition · Computer Science 2025-06-17 Jian Lang , Zhangtao Cheng , Ting Zhong , Fan Zhou

Retrieval-Augmented Generation (RAG) significantly improves the performance of Large Language Models (LLMs) on knowledge-intensive tasks. However, varying response quality across LLMs under RAG necessitates intelligent routing mechanisms,…

Computation and Language · Computer Science 2025-10-20 Jiarui Zhang , Xiangyu Liu , Yong Hu , Chaoyue Niu , Fan Wu , Guihai Chen

We present a new benchmark for evaluating Deep Search--a realistic and complex form of retrieval-augmented generation (RAG) that requires source-aware, multi-hop reasoning over diverse, sparsed, but related sources. These include documents,…

Computation and Language · Computer Science 2025-07-01 Prafulla Kumar Choubey , Xiangyu Peng , Shilpa Bhagavath , Kung-Hsiang Huang , Caiming Xiong , Chien-Sheng Wu

Retrieval-Augmented Generation (RAG) systems enhance large language models (LLMs) by integrating external knowledge sources, enabling more accurate and contextually relevant responses tailored to user needs. However, existing RAG systems…

Information Retrieval · Computer Science 2025-04-29 Zirui Guo , Lianghao Xia , Yanhua Yu , Tu Ao , Chao Huang

Retrieval-augmented generation (RAG) enhances large language models (LLMs) by incorporating external documents at inference time, enabling up-to-date knowledge access without costly retraining. However, conventional RAG methods retrieve…

Computation and Language · Computer Science 2025-07-08 Ting-Wen Ko , Jyun-Yu Jiang , Pu-Jen Cheng

Industrial multi-label document understanding pipelines score candidate labels and threshold or rank them to form a label set per document. This early selection step directly affects the accuracy of downstream information extraction from…

Information Retrieval · Computer Science 2026-05-19 Lasal Jayawardena , Nirmalie Wiratunga , Ikechukwu Nkisi-Orji , Darren Nicol

This work presents a novel architecture for building Retrieval-Augmented Generation (RAG) systems to improve Question Answering (QA) tasks from a target corpus. Large Language Models (LLMs) have revolutionized the analyzing and generation…

Computation and Language · Computer Science 2025-01-09 Binita Saha , Utsha Saha , Muhammad Zubair Malik

Retrieval-Augmented Generation (RAG) extends large language models (LLMs) beyond parametric knowledge, yet it is unclear when iterative retrieval-reasoning loops meaningfully outperform static RAG, particularly in scientific domains with…

Computation and Language · Computer Science 2026-05-05 Mahdi Astaraki , Mohammad Arshi Saloot , Ali Shiraee Kasmaee , Hamidreza Mahyar , Soheila Samiee

Retrieval-augmented generation (RAG) has rapidly advanced the language model field, particularly in question-answering (QA) systems. By integrating external documents during the response generation phase, RAG significantly enhances the…

Computation and Language · Computer Science 2024-09-25 Xinyue Chen , Pengyu Gao , Jiangjiang Song , Xiaoyang Tan

Retrieval-Augmented Generation (RAG) couples a retriever with a large language model (LLM) to ground generated responses in external evidence. While this framework enhances factuality and domain adaptability, it faces a key bottleneck:…

Information Retrieval · Computer Science 2026-01-08 Sherine George

Retrieval-Augmented Generation (RAG) grounds large language model outputs in external evidence, but remains challenged on multi-hop question answering that requires long reasoning. Recent works scale RAG at inference time along two…

Retrieval-augmented generation (RAG) has recently become a very popular task for Large Language Models (LLMs). Evaluating them on multi-turn RAG conversations, where the system is asked to generate a response to a question in the context of…

Retrieval-Augmented Generation (RAG) mitigates hallucination in large language models (LLMs) by incorporating external knowledge during generation. However, the effectiveness of RAG depends not only on the design of the retriever and the…

Computation and Language · Computer Science 2026-04-15 Xudong Wang , Chaoning Zhang , Qigan Sun , Zhenzhen Huang , Chang Lu , Sheng Zheng , Zeyu Ma , Caiyan Qin , Yang Yang , Hengtao Shen

Large language models (LLMs) have demonstrated remarkable capabilities in a wide range of tasks, yet their application to specialized domains remains challenging due to the need for deep expertise. Retrieval-Augmented generation (RAG) has…

Computation and Language · Computer Science 2025-09-30 Qinggang Zhang , Shengyuan Chen , Yuanchen Bei , Zheng Yuan , Huachi Zhou , Zijin Hong , Hao Chen , Yilin Xiao , Chuang Zhou , Junnan Dong , Yi Chang , Xiao Huang