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Generating long and coherent reports to describe medical images poses challenges to bridging visual patterns with informative human linguistic descriptions. We propose a novel Hybrid Retrieval-Generation Reinforced Agent (HRGR-Agent) which…

Computer Vision and Pattern Recognition · Computer Science 2018-11-27 Christy Y. Li , Xiaodan Liang , Zhiting Hu , Eric P. Xing

Retrieval-augmented generation (RAG) utilizes retrieved texts to enhance large language models (LLMs). Studies show that while RAG provides valuable external information (benefit), it may also mislead LLMs (detriment) with noisy or…

Computation and Language · Computer Science 2025-03-03 Shicheng Xu , Liang Pang , Huawei Shen , Xueqi Cheng

Python's dynamic typing system offers flexibility and expressiveness but can lead to type-related errors, prompting the need for automated type inference to enhance type hinting. While existing learning-based approaches show promising…

Software Engineering · Computer Science 2024-08-14 Chong Wang , Jian Zhang , Yiling Lou , Mingwei Liu , Weisong Sun , Yang Liu , Xin Peng

To ensure large language models (LLMs) are used safely, one must reduce their propensity to hallucinate or to generate unacceptable answers. A simple and often used strategy is to first let the LLM generate multiple hypotheses and then…

Computation and Language · Computer Science 2025-02-12 António Farinhas , Haau-Sing Li , André F. T. Martins

Reward models are critical for reinforcement learning from human feedback, as they determine the alignment quality and reliability of generative models. For complex tasks such as image editing, reward models are required to capture global…

Existing pre-trained models for knowledge-graph-to-text (KG-to-text) generation simply fine-tune text-to-text pre-trained models such as BART or T5 on KG-to-text datasets, which largely ignore the graph structure during encoding and lack…

Computation and Language · Computer Science 2021-06-22 Pei Ke , Haozhe Ji , Yu Ran , Xin Cui , Liwei Wang , Linfeng Song , Xiaoyan Zhu , Minlie Huang

Deep learning methods have recently achieved great empirical success on machine translation, dialogue response generation, summarization, and other text generation tasks. At a high level, the technique has been to train end-to-end neural…

Computation and Language · Computer Science 2017-11-28 Ziang Xie

Reranking plays a crucial role in modern multi-stage recommender systems by rearranging the initial ranking list. Due to the inherent challenges of combinatorial search spaces, some current research adopts an evaluator-generator paradigm,…

Information Retrieval · Computer Science 2025-02-12 Shuli Wang , Xue Wei , Senjie Kou , Chi Wang , Wenshuai Chen , Qi Tang , Yinhua Zhu , Xiong Xiao , Xingxing Wang

Training generative models that can generate high-quality text with sufficient diversity is an important open problem for Natural Language Generation (NLG) community. Recently, generative adversarial models have been applied extensively on…

Computation and Language · Computer Science 2020-03-26 Haiyan Yin , Dingcheng Li , Xu Li , Ping Li

Large language models are powerful text processors and reasoners, but are still subject to limitations including outdated knowledge and hallucinations, which necessitates connecting them to the world. Retrieval-augmented large language…

Computation and Language · Computer Science 2023-10-24 Zhihong Shao , Yeyun Gong , Yelong Shen , Minlie Huang , Nan Duan , Weizhu Chen

The results of information retrieval (IR) are usually presented in the form of a ranked list of candidate documents, such as web search for humans and retrieval-augmented generation for large language models (LLMs). List-aware retrieval…

Information Retrieval · Computer Science 2024-02-06 Shicheng Xu , Liang Pang , Jun Xu , Huawei Shen , Xueqi Cheng

Math word problem (MWP) is a challenging and critical task in natural language processing. Many recent studies formalize MWP as a generation task and have adopted sequence-to-sequence models to transform problem descriptions to mathematical…

Computation and Language · Computer Science 2021-09-08 Jianhao Shen , Yichun Yin , Lin Li , Lifeng Shang , Xin Jiang , Ming Zhang , Qun Liu

Reinforcement learning (RL) has emerged as a powerful paradigm for fine-tuning Large Language Models (LLMs) for text generation. In particular, recent LLMs such as ChatGPT and GPT-4 can engage in fluent conversations with users after…

Machine Learning · Computer Science 2023-11-14 Jonathan D. Chang , Kiante Brantley , Rajkumar Ramamurthy , Dipendra Misra , Wen Sun

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

Rationalization is to employ a generator and a predictor to construct a self-explaining NLP model in which the generator selects a subset of human-intelligible pieces of the input text to the following predictor. However, rationalization…

Machine Learning · Computer Science 2023-07-25 Wei Liu , Haozhao Wang , Jun Wang , Ruixuan Li , Xinyang Li , Yuankai Zhang , Yang Qiu

A new generative adversarial network is developed for joint distribution matching. Distinct from most existing approaches, that only learn conditional distributions, the proposed model aims to learn a joint distribution of multiple random…

Machine Learning · Computer Science 2018-06-11 Yunchen Pu , Shuyang Dai , Zhe Gan , Weiyao Wang , Guoyin Wang , Yizhe Zhang , Ricardo Henao , Lawrence Carin

Automatic question generation (QG) is a useful yet challenging task in NLP. Recent neural network-based approaches represent the state-of-the-art in this task. In this work, we attempt to strengthen them significantly by adopting a holistic…

Computation and Language · Computer Science 2019-09-17 Vishwajeet Kumar , Ganesh Ramakrishnan , Yuan-Fang Li

This research presents and compares multiple approaches to automate the generation of literature reviews using several Natural Language Processing (NLP) techniques and retrieval-augmented generation (RAG) with a Large Language Model (LLM).…

Computation and Language · Computer Science 2024-11-28 Nurshat Fateh Ali , Md. Mahdi Mohtasim , Shakil Mosharrof , T. Gopi Krishna

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

Generative Adversarial Networks (GANs) have experienced a recent surge in popularity, performing competitively in a variety of tasks, especially in computer vision. However, GAN training has shown limited success in natural language…

Computation and Language · Computer Science 2019-01-03 David Donahue , Anna Rumshisky