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Given a graph with textual attributes, we enable users to `chat with their graph': that is, to ask questions about the graph using a conversational interface. In response to a user's questions, our method provides textual replies and…

Machine Learning · Computer Science 2024-05-28 Xiaoxin He , Yijun Tian , Yifei Sun , Nitesh V. Chawla , Thomas Laurent , Yann LeCun , Xavier Bresson , Bryan Hooi

Chain-of-thought (CoT) reasoning boosts large language models' (LLMs) performance on complex tasks but faces two key limitations: a lack of reliability when solely relying on LLM-generated reasoning chains and lower reasoning performance…

Computation and Language · Computer Science 2025-09-11 Feiyang Li , Peng Fang , Zhan Shi , Arijit Khan , Fang Wang , Weihao Wang , Xin Zhang , Yongjian Cui

Large pre-trained language models have been shown to store factual knowledge in their parameters, and achieve state-of-the-art results when fine-tuned on downstream NLP tasks. However, their ability to access and precisely manipulate…

Retrieval-Augmented Generation (RAG) lifts the factuality of Large Language Models (LLMs) by injecting external knowledge, yet it falls short on problems that demand multi-step inference; conversely, purely reasoning-oriented approaches…

Retrieval-Augmented Generation (RAG) has become a powerful and widely used approach for improving large language models by grounding generation in retrieved evidence. However, RAG systems still produce incorrect answers in many cases. Why…

Computation and Language · Computer Science 2026-05-15 Kai Guo , Xinnan Dai , Zhibo Zhang , Nuohan Lin , Shenglai Zeng , Jie Ren , Haoyu Han , Jiliang Tang

Large Language Models (LLMs) have significantly enhanced conversational Artificial Intelligence(AI) chatbots; however, domain-specific accuracy and the avoidance of factual inconsistencies remain pressing challenges, particularly for large…

Information Retrieval · Computer Science 2025-09-24 Olalekan K. Akindele , Bhupesh Kumar Mishra , Kenneth Y. Wertheim

Retrieval-augmented generation has gained significant attention due to its ability to integrate relevant external knowledge, enhancing the accuracy and reliability of the LLMs' responses. Most of the existing methods apply a dynamic…

Computation and Language · Computer Science 2025-01-13 Liang Xiao , Wen Dai , Shuai Chen , Bin Qin , Chongyang Shi , Haopeng Jing , Tianyu Guo

Large Language Models (LLMs) have shown remarkable capabilities across diverse tasks, yet they face inherent limitations such as constrained parametric knowledge and high retraining costs. Retrieval-Augmented Generation (RAG) augments the…

Information Retrieval · Computer Science 2025-08-26 Leqian Li , Dianxi Shi , Jialu Zhou , Xinyu Wei , Mingyue Yang , Songchang Jin , Shaowu Yang

Most of the existing works for dialogue generation are data-driven models trained directly on corpora crawled from websites. They mainly focus on improving the model architecture to produce better responses but pay little attention to…

Computation and Language · Computer Science 2021-06-23 Xin Li , Piji Li , Yan Wang , Xiaojiang Liu , Wai Lam

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

Efficient knowledge retrieval plays a pivotal role in ensuring the success of end-to-end task-oriented dialogue systems by facilitating the selection of relevant information necessary to fulfill user requests. However, current approaches…

Computation and Language · Computer Science 2023-10-24 Tianyuan Shi , Liangzhi Li , Zijian Lin , Tao Yang , Xiaojun Quan , Qifan Wang

Building open-domain dialogue systems capable of rich human-like conversational ability is one of the fundamental challenges in language generation. However, even with recent advancements in the field, existing open-domain generative models…

Computation and Language · Computer Science 2022-06-14 Ritvik Choudhary , Daisuke Kawahara

To alleviate the problem of structured databases' limited coverage, recent task-oriented dialogue systems incorporate external unstructured knowledge to guide the generation of system responses. However, these usually use word or sentence…

Computation and Language · Computer Science 2022-12-13 Yue Feng , Gerasimos Lampouras , Ignacio Iacobacci

Current general-purpose large language models (LLMs) commonly exhibit knowledge hallucination and insufficient domain-specific adaptability in domain-specific tasks, limiting their effectiveness in specialized question answering scenarios.…

Information Retrieval · Computer Science 2025-09-16 Mengzheng Yang , Yanfei Ren , David Osei Opoku , Ruochang Li , Peng Ren , Chunxiao Xing

Large Language Models (LLMs) and Knowledge Graphs (KGs) offer a promising approach to robust and explainable Question Answering (QA). While LLMs excel at natural language understanding, they suffer from knowledge gaps and hallucinations.…

Machine Learning · Computer Science 2025-04-15 Jasper Linders , Jakub M. Tomczak

The development of trustworthy conversational information-seeking systems relies on dialogue models that can generate faithful and accurate responses based on relevant knowledge texts. However, two main challenges hinder this task. Firstly,…

Computation and Language · Computer Science 2023-11-03 Wanyu Du , Yangfeng Ji

Medical question answering requires extensive access to specialized conceptual knowledge. The current paradigm, Retrieval-Augmented Generation (RAG), acquires expertise medical knowledge through large-scale corpus retrieval and uses this…

Computation and Language · Computer Science 2025-02-20 Sichu Liang , Linhai Zhang , Hongyu Zhu , Wenwen Wang , Yulan He , Deyu Zhou

A proactive dialogue system has the ability to proactively lead the conversation. Different from the general chatbots which only react to the user, proactive dialogue systems can be used to achieve some goals, e.g., to recommend some items…

Computation and Language · Computer Science 2021-07-20 Yutao Zhu , Jian-Yun Nie , Kun Zhou , Pan Du , Hao Jiang , Zhicheng Dou

In open-domain conversational systems, it is important but challenging to leverage background knowledge. We can use the incorporation of knowledge to make the generation of dialogue controllable, and can generate more diverse sentences that…

Artificial Intelligence · Computer Science 2021-05-06 Cheng Luo , Dayiheng Liu , Chanjuan Li , Li Lu , Jiancheng Lv

Medical dialogue generation is an important yet challenging task. Most previous works rely on the attention mechanism and large-scale pretrained language models. However, these methods often fail to acquire pivotal information from the long…

Artificial Intelligence · Computer Science 2022-06-20 Yu Zhao , Yunxin Li , Yuxiang Wu , Baotian Hu , Qingcai Chen , Xiaolong Wang , Yuxin Ding , Min Zhang