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To deliver coherent and personalized experiences in long-term conversations, existing approaches typically perform retrieval augmented response generation by constructing memory banks from conversation history at either the turn-level,…

Computation and Language · Computer Science 2025-03-04 Zhuoshi Pan , Qianhui Wu , Huiqiang Jiang , Xufang Luo , Hao Cheng , Dongsheng Li , Yuqing Yang , Chin-Yew Lin , H. Vicky Zhao , Lili Qiu , Jianfeng Gao

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

Long-term conversational large language model (LLM) agents require memory systems that can recover relevant evidence from historical interactions without overwhelming the answer stage with irrelevant context. However, existing memory…

Computation and Language · Computer Science 2026-04-23 Shuqi Cao , Jingyi He , Fei Tan

Long-horizon personalization requires dialogue assistants to retrieve user-specific facts from extended interaction histories. In practice, many relevant facts often have low semanticsimilarity to the query under dense retrieval. Standard…

Information Retrieval · Computer Science 2026-05-15 Harshita Chopra , Krishna Kant Chintalapudi , Suman Nath , Ryen W. White , Chirag Shah

Modern task-oriented dialogue (TOD) systems increasingly rely on large language model (LLM) agents, leveraging Retrieval-Augmented Generation (RAG) and long-context capabilities for long-term memory utilization. However, these methods are…

Computation and Language · Computer Science 2025-08-14 Yiming Du , Bingbing Wang , Yang He , Bin Liang , Baojun Wang , Zhongyang Li , Lin Gui , Jeff Z. Pan , Ruifeng Xu , Kam-Fai Wong

We introduce Lookup-Table Language Models (LookupLM), a method for scaling up the size of RNN language models with only a constant increase in the floating point operations, by increasing the expressivity of the embedding table. In…

Computation and Language · Computer Science 2021-06-08 W. Ronny Huang , Tara N. Sainath , Cal Peyser , Shankar Kumar , David Rybach , Trevor Strohman

Large language models (LLMs) are increasingly deployed for understanding large codebases, but whether they understand operational semantics of long code context or rely on pattern matching shortcuts remains unclear. We distinguish between…

Computation and Language · Computer Science 2026-04-21 Adam Štorek , Mukur Gupta , Samira Hajizadeh , Prashast Srivastava , Suman Jana

Large Language Model (LLM)-based systems, i.e. interconnected elements that include an LLM as a central component, such as conversational agents, are usually designed with monolithic, static architectures that rely on a single,…

Artificial Intelligence · Computer Science 2025-07-22 Clovis Varangot-Reille , Christophe Bouvard , Antoine Gourru , Mathieu Ciancone , Marion Schaeffer , François Jacquenet

Production log analytics in self-hosted, resource-constrained environments requires natural-language access to massive log streams without the cost of routing every query through a large language model. We present LogRouter, an end-to-end…

Machine Learning · Computer Science 2026-05-19 Mert Coskuner , Merve Zeybel , Melik Mert Dolan

As large language models (LLMs) show impressive performance on complex tasks, they still struggle with longer contextual understanding and high computational costs. To balance efficiency and quality, we introduce LLMSteer, a…

Machine Learning · Computer Science 2024-11-22 Zhuohan Gu , Jiayi Yao , Kuntai Du , Junchen Jiang

Embedding-based retrieval models have made significant strides in retrieval-augmented generation (RAG) techniques for text and multimodal large language models (LLMs) applications. However, when it comes to speech larage language models…

Audio and Speech Processing · Electrical Eng. & Systems 2025-12-11 Chunyu Sun , Bingyu Liu , Zhichao Cui , Junhan Shi , Anbin Qi , Tian-hao Zhang , Dinghao Zhou , Lewei Lu

Recent large language models (LLMs) demonstrate impressive capabilities in handling long contexts, some exhibiting near-perfect recall on synthetic retrieval tasks. However, these evaluations have mainly focused on English text and involved…

Computation and Language · Computer Science 2024-10-15 Ameeta Agrawal , Andy Dang , Sina Bagheri Nezhad , Rhitabrat Pokharel , Russell Scheinberg

Large Language Models (LLMs) have recently been widely adopted in conversational agents. However, the increasingly long interactions between users and agents accumulate extensive dialogue records, making it difficult for LLMs with limited…

Computation and Language · Computer Science 2025-09-30 Derong Xu , Yi Wen , Pengyue Jia , Yingyi Zhang , wenlin zhang , Yichao Wang , Huifeng Guo , Ruiming Tang , Xiangyu Zhao , Enhong Chen , Tong Xu

Production AI agents frequently receive user-specific queries that are highly repetitive, with up to 47\% being semantically similar to prior interactions, yet each query is typically processed with the same computational cost. We argue…

Computation and Language · Computer Science 2026-03-25 Xunzhuo Liu , Bowei He , Xue Liu , Andy Luo , Haichen Zhang , Huamin Chen

Existing large language models (LLMs) can only afford fix-sized inputs due to the input length limit, preventing them from utilizing rich long-context information from past inputs. To address this, we propose a framework, Language Models…

Computation and Language · Computer Science 2023-06-13 Weizhi Wang , Li Dong , Hao Cheng , Xiaodong Liu , Xifeng Yan , Jianfeng Gao , Furu Wei

Large Language Model (LLM) agents require persistent memory to maintain personalization, factual continuity, and long-horizon reasoning, yet standard context-window and retrieval-augmented generation (RAG) pipelines degrade over…

Artificial Intelligence · Computer Science 2026-04-07 Shu Wang , Edwin Yu , Oscar Love , Tom Zhang , Tom Wong , Steve Scargall , Charles Fan

Knowledge Tracing (KT) models students' evolving knowledge states to predict future performance, serving as a foundation for personalized education. While traditional deep learning models achieve high accuracy, they often lack…

Computation and Language · Computer Science 2026-03-25 Runze Li , Kedi Chen , Guwei Feng , Mo Yu , Jun Wang , Wei Zhang

Despite the recent advancement in Retrieval-Augmented Generation (RAG) systems, most retrieval methodologies are often developed for factual retrieval, which assumes query and positive documents are semantically similar. In this paper, we…

Information Retrieval · Computer Science 2025-04-10 Luo Ji , Feixiang Guo , Teng Chen , Qingqing Gu , Xiaoyu Wang , Ningyuan Xi , Yihong Wang , Peng Yu , Yue Zhao , Hongyang Lei , Zhonglin Jiang , Yong Chen

The hallucinations of large language models (LLMs) are increasingly mitigated by allowing LLMs to search for information and to ground their answers in real sources. Unfortunately, LLMs often struggle with posing the right search queries,…

Machine Learning · Computer Science 2024-11-01 Sheryl Hsu , Omar Khattab , Chelsea Finn , Archit Sharma

Despite the success of Retrieval-Augmented Generation (RAG) in grounding LLMs with external knowledge, its application over heterogeneous sources (e.g., private databases, global corpora, and APIs) remains a significant challenge. Existing…

Information Retrieval · Computer Science 2026-04-24 Jiahe Liu , Qinkai Yu , Jingcheng Niu , Xi Zhu , Zirui He , Zhen Xiang , Fan Yang , Jinman Zhao