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In multi-turn dialogue generation, response is usually related with only a few contexts. Therefore, an ideal model should be able to detect these relevant contexts and produce a suitable response accordingly. However, the widely used…

Computation and Language · Computer Science 2019-07-12 Hainan Zhang , Yanyan Lan , Liang Pang , Jiafeng Guo , Xueqi Cheng

Linear attention offers a computationally efficient yet expressive alternative to softmax attention. However, recent empirical results indicate that the hidden state of trained linear attention models often exhibits a low-rank structure,…

Machine Learning · Computer Science 2026-02-13 Philipp Nazari , T. Konstantin Rusch

On a wide range of natural language processing and information retrieval tasks, transformer-based models, particularly pre-trained language models like BERT, have demonstrated tremendous effectiveness. Due to the quadratic complexity of the…

Information Retrieval · Computer Science 2022-10-18 Minghan Li , Diana Nicoleta Popa , Johan Chagnon , Yagmur Gizem Cinar , Eric Gaussier

Retrieval-Augmented Generation (RAG) enhances the performance of Large Language Models (LLMs) by incorporating external knowledge. However, LLMs still encounter challenges in effectively utilizing the knowledge from retrieved documents,…

Computation and Language · Computer Science 2025-02-26 Mingyan Wu , Zhenghao Liu , Yukun Yan , Xinze Li , Shi Yu , Zheni Zeng , Yu Gu , Ge Yu

Advancements in Large Language Models (LLMs) have extended their input context length, yet they still struggle with retrieval and reasoning in long-context inputs. Existing methods propose to utilize the prompt strategy and retrieval head…

Computation and Language · Computer Science 2025-05-16 Han Peng , Jinhao Jiang , Zican Dong , Wayne Xin Zhao , Lei Fang

Evaluating the abilities of large language models (LLMs) for tasks that require long-term memory and thus long-context reasoning, for example in conversational settings, is hampered by the existing benchmarks, which often lack narrative…

Computation and Language · Computer Science 2026-02-24 Mohammad Tavakoli , Alireza Salemi , Carrie Ye , Mohamed Abdalla , Hamed Zamani , J Ross Mitchell

Large language models (LLMs) have recently shown strong reasoning abilities in domains like mathematics, coding, and scientific problem-solving, yet their potential for ranking tasks, where prime examples include retrieval, recommender…

Information Retrieval · Computer Science 2025-10-17 Tao Feng , Zhigang Hua , Zijie Lei , Yan Xie , Shuang Yang , Bo Long , Jiaxuan You

To tackle long-context reasoning tasks without the quadratic complexity of standard attention mechanisms, approaches based on agent memory have emerged, which typically maintain a dynamically updated memory when linearly processing document…

Computation and Language · Computer Science 2026-05-12 Baibei Ji , Xiaoyang Weng , Juntao Li , Zecheng Tang , Yihang Lou , Min Zhang

Conversational speech recognition is regarded as a challenging task due to its free-style speaking and long-term contextual dependencies. Prior work has explored the modeling of long-range context through RNNLM rescoring with improved…

Sound · Computer Science 2020-11-19 Kun Wei , Pengcheng Guo , Hang Lv , Zhen Tu , Lei Xie

The efficient processing of long context poses a serious challenge for large language models (LLMs). Recently, retrieval-augmented generation (RAG) has emerged as a promising strategy for this problem, as it enables LLMs to make selective…

Computation and Language · Computer Science 2025-02-18 Kun Luo , Zheng Liu , Peitian Zhang , Hongjin Qian , Jun Zhao , Kang Liu

As large language models (LLMs) evolve into autonomous agents, persistent memory at the API layer is essential for enabling context-aware behavior across LLMs and multi-session interactions. Existing approaches force vendor lock-in and rely…

Machine Learning · Computer Science 2026-03-23 Luiz C. Borro , Luiz A. B. Macarini , Gordon Tindall , Michael Montero , Adam B. Struck

Efficiently handling long contexts in transformer-based language models with low perplexity is an active area of research. Numerous recent approaches like Linformer, Longformer, Performer, and Structured state space models (SSMs)., have not…

Machine Learning · Computer Science 2025-04-22 Sushant Singh , Ausif Mahmood

State-of-the-art neural models typically encode document-query pairs using cross-attention for re-ranking. To this end, models generally utilize an encoder-only (like BERT) paradigm or an encoder-decoder (like T5) approach. These paradigms,…

Computation and Language · Computer Science 2022-04-26 Kai Hui , Honglei Zhuang , Tao Chen , Zhen Qin , Jing Lu , Dara Bahri , Ji Ma , Jai Prakash Gupta , Cicero Nogueira dos Santos , Yi Tay , Don Metzler

This paper describes a compact and effective model for low-latency passage retrieval in conversational search based on learned dense representations. Prior to our work, the state-of-the-art approach uses a multi-stage pipeline comprising…

Information Retrieval · Computer Science 2021-11-30 Sheng-Chieh Lin , Jheng-Hong Yang , Jimmy Lin

Existing long-horizon memory benchmarks mostly use multi-turn dialogues or synthetic user histories, which makes retrieval performance an imperfect proxy for person understanding. We present \BenchName, a publicly releasable benchmark built…

Artificial Intelligence · Computer Science 2026-04-21 Tingyu Wu , Zhisheng Chen , Ziyan Weng , Shuhe Wang , Chenglong Li , Shuo Zhang , Sen Hu , Silin Wu , Qizhen Lan , Huacan Wang , Ronghao Chen

Multi-agent large language model (LLM) systems have shown strong potential in complex reasoning and collaborative decision-making tasks. However, most existing coordination schemes rely on static or full-context routing strategies, which…

Computation and Language · Computer Science 2025-08-13 Jun Liu , Zhenglun Kong , Changdi Yang , Fan Yang , Tianqi Li , Peiyan Dong , Joannah Nanjekye , Hao Tang , Geng Yuan , Wei Niu , Wenbin Zhang , Pu Zhao , Xue Lin , Dong Huang , Yanzhi Wang

Modern retrieval pipelines increasingly serve downstream consumers like retrieval-augmented generation (RAG) and autonomous agents that need more than a scalar relevance score. A reranker that only tells the caller "how relevant" forces the…

Information Retrieval · Computer Science 2026-04-28 Dun Zhang

Large Language Models (LLMs) have demonstrated significant strides across various information retrieval tasks, particularly as rerankers, owing to their strong generalization and knowledge-transfer capabilities acquired from extensive…

Information Retrieval · Computer Science 2025-06-18 Rahul Seetharaman , Kaustubh D. Dhole , Aman Bansal

Retrieval-augmented generation (RAG) enhances large language models (LLMs) by incorporating external knowledge to generate a response within a context with improved accuracy and reduced hallucinations. However, multi-modal RAG systems face…

Machine Learning · Computer Science 2025-01-09 Matin Mortaheb , Mohammad A. Amir Khojastepour , Srimat T. Chakradhar , Sennur Ulukus

Large language models with long context windows can answer complex questions directly from full-length academic, technical, and policy documents, but passing entire documents is often costly, slow, and can degrade answer quality while…