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Overcoming the limited context limitations in early-generation LLMs, retrieval-augmented generation (RAG) has been a reliable solution for context-based answer generation in the past. Recently, the emergence of long-context LLMs allows the…

Computation and Language · Computer Science 2024-09-04 Tan Yu , Anbang Xu , Rama Akkiraju

Incorporating prior knowledge like lexical constraints into the model's output to generate meaningful and coherent sentences has many applications in dialogue system, machine translation, image captioning, etc. However, existing RNN-based…

Computation and Language · Computer Science 2019-11-20 Dayiheng Liu , Jie Fu , Qian Qu , Jiancheng Lv

In real-world question-answering (QA) systems, ill-formed questions, such as wrong words, ill word order, and noisy expressions, are common and may prevent the QA systems from understanding and answering them accurately. In order to…

Information Retrieval · Computer Science 2019-10-10 Ye Liu , Chenwei Zhang , Xiaohui Yan , Yi Chang , Philip S. Yu

Lexically constrained sentence generation allows the incorporation of prior knowledge such as lexical constraints into the output. This technique has been applied to machine translation, and dialog response generation. Previous work usually…

Computation and Language · Computer Science 2021-09-14 Xingwei He , Victor O. K. Li

End-to-end dialogue generation has achieved promising results without using handcrafted features and attributes specific for each task and corpus. However, one of the fatal drawbacks in such approaches is that they are unable to generate…

Computation and Language · Computer Science 2019-03-26 Hao-Tong Ye , Kai-Ling Lo , Shang-Yu Su , Yun-Nung Chen

In phase retrieval and similar inverse problems, the stability of solutions across different noise levels is crucial for applications. One approach to promote it is using signal priors in a form of a generative model as a regularization, at…

Machine Learning · Statistics 2025-02-04 Selin Aslan , Tristan van Leeuwen , Allard Mosk , Palina Salanevich

Although current state-of-the-art language models have achieved impressive results in numerous natural language processing tasks, still they could not solve the problem of producing repetitive, dull and sometimes inconsistent text in…

Computation and Language · Computer Science 2021-08-10 An Nguyen

We introduce the multiresolution recurrent neural network, which extends the sequence-to-sequence framework to model natural language generation as two parallel discrete stochastic processes: a sequence of high-level coarse tokens, and a…

Computation and Language · Computer Science 2016-06-15 Iulian Vlad Serban , Tim Klinger , Gerald Tesauro , Kartik Talamadupula , Bowen Zhou , Yoshua Bengio , Aaron Courville

We address the task of sentence retrieval for open-ended dialogues. The goal is to retrieve sentences from a document corpus that contain information useful for generating the next turn in a given dialogue. Prior work on dialogue-based…

Information Retrieval · Computer Science 2022-05-25 Itay Harel , Hagai Taitelbaum , Idan Szpektor , Oren Kurland

Numerical reasoning over hybrid data containing tables and long texts has recently received research attention from the AI community. To generate an executable reasoning program consisting of math and table operations to answer a question,…

Computation and Language · Computer Science 2022-11-24 Xiao Li , Yin Zhu , Sichen Liu , Jiangzhou Ju , Yuzhong Qu , Gong Cheng

Existing models on open-domain comment generation are difficult to train, and they produce repetitive and uninteresting responses. The problem is due to multiple and contradictory responses from a single article, and by the rigidity of…

Computation and Language · Computer Science 2019-02-28 Zhaojiang Lin , Genta Indra Winata , Pascale Fung

Recently, open-domain dialogue systems have attracted growing attention. Most of them use the sequence-to-sequence (Seq2Seq) architecture to generate responses. However, traditional Seq2Seq-based open-domain dialogue models tend to generate…

Computation and Language · Computer Science 2020-07-06 Heng-Da Xu , Xian-Ling Mao , Zewen Chi , Jing-Jing Zhu , Fanshu Sun , Heyan Huang

Recent advances in large language models have enabled the development of viable generative retrieval systems. Instead of a traditional document ranking, generative retrieval systems often directly return a grounded generated text as a…

Question answering (QA) has become an important application in the advanced development of large language models. General pre-trained large language models for question-answering are not trained to properly understand the knowledge or…

Computation and Language · Computer Science 2024-05-30 Sanat Sharma , David Seunghyun Yoon , Franck Dernoncourt , Dewang Sultania , Karishma Bagga , Mengjiao Zhang , Trung Bui , Varun Kotte

Large language models can produce fluent dialogue but often hallucinate factual inaccuracies. While retrieval-augmented models help alleviate this issue, they still face a difficult challenge of both reasoning to provide correct knowledge…

Computation and Language · Computer Science 2021-11-10 Leonard Adolphs , Kurt Shuster , Jack Urbanek , Arthur Szlam , Jason Weston

Neural language model-based approaches to automated story generation suffer from two important limitations. First, language model-based story generators generally do not work toward a given goal or ending. Second, they often lose coherence…

Computation and Language · Computer Science 2021-12-08 Louis Castricato , Spencer Frazier , Jonathan Balloch , Nitya Tarakad , Mark Riedl

This paper addresses the question: Why do neural dialog systems generate short and meaningless replies? We conjecture that, in a dialog system, an utterance may have multiple equally plausible replies, causing the deficiency of neural…

Computation and Language · Computer Science 2017-12-07 Bolin Wei , Shuai Lu , Lili Mou , Hao Zhou , Pascal Poupart , Ge Li , Zhi Jin

Exemplar-based generative models for open-domain conversation produce responses based on the exemplars provided by the retriever, taking advantage of generative models and retrieval models. However, they often ignore the retrieved exemplars…

Computation and Language · Computer Science 2021-12-14 Seungju Han , Beomsu Kim , Seokjun Seo , Enkhbayar Erdenee , Buru Chang

Retrieval-augmented generation (RAG) enhances LLMs with external knowledge, yet generation remains vulnerable to retrieval-induced noise and uncertain placement of relevant chunks, often causing hallucinations. We present Ext2Gen, an…

Computation and Language · Computer Science 2025-11-18 Hwanjun Song , Jeonghwan Choi , Minseok Kim

This paper addresses user-specific dialogs. In contrast to previous research on personalized dialogue focused on achieving virtual user dialogue as defined by persona descriptions, user-specific dialogue aims to reproduce real-user dialogue…

Computation and Language · Computer Science 2024-09-04 Atsushi Otsuka , Kazuya Matsuo , Ryo Ishii , Narichika Nomoto , Hiroaki Sugiyama
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