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Qun Liu

111 accepted papers

2026

Large Language Models Struggle with Unreasonability in Math Problems

AAAI 2026technical

Large Language Models (LLMs) have shown remarkable success on a wide range of math and reasoning benchmarks. However, we observe that they often struggle when faced with unreasonable math problems. Instead of recognizing these issues, models frequently proceed as if the problem is well-posed, produc

Cited by 0SourcePDFScholar
2026

ToolACE-MT: Non-Autoregressive Generation for Agentic Multi-Turn Interaction

ICLR 2026poster

Agentic task-solving with Large Language Models (LLMs) requires multi-turn, multi-step interactions, often involving complex function calls and dynamic user-agent exchanges. Existing simulation-based data generation methods for such scenarios rely heavily on costly autoregressive interactions betwee…

Cited by 0SourcecodeScholar
2026

ToolACE-R: Model-aware Iterative Training and Adaptive Refinement for Tool learning

AAAI 2026technical

Tool learning, which allows Large Language Models (LLMs) to leverage external tools for solving complex user tasks, has emerged as a promising avenue for extending model capabilities. However, existing approaches primarily focus on data synthesis for fine-tuning LLMs to invoke tools effectively, lar

Cited by 0SourcePDFScholar
2025

A Comprehensive Evaluation on Event Reasoning of Large Language Models

AAAI 2025technical

Event reasoning is a fundamental ability that underlies many applications. It requires event schema knowledge to perform global reasoning and needs to deal with the diversity of the inter-event relations and the reasoning paradigms. The extent to which LLMs excel in event reasoning across various re…

2025

Chain-of-Probe: Examining the Necessity and Accuracy of CoT Step-by-Step

NAACL 2025findings

Current research found the issue of Early Answering in large language models (LLMs), where the models already have an answer before generating the Chain-of-Thought (CoT). This phenomenon suggests a potential lack of necessary dependency between the predicted answer and the reasoning process. Consequ…

Cited by 3SourcePDFScholar
2025

Corrupted but Not Broken: Understanding and Mitigating the Negative Impacts of Corrupted Data in Visual Instruction Tuning

EMNLP 2025

Visual Instruction Tuning (VIT) aims to enhance Multimodal Large Language Models (MLLMs), yet its effectiveness is often compromised by corrupted datasets with issues such as hallucinated content, incorrect responses, and poor OCR quality. Previous approaches to address these challenges have focused

Cited by 0SourcePDFScholar
2025

EMOVA: Empowering Language Models to See, Hear and Speak with Vivid Emotions

CVPR 2025poster

GPT-4o, an omni-modal model that enables vocal conversations with diverse emotions and tones, marks a milestone for omni-modal foundation models. However, empowering Large Language Models to perceive and generate images, texts, and speeches end-to-end with publicly available data remains challenging…

Cited by 23SourcePDFScholar
2025

Friends-MMC: A Dataset for Multi-modal Multi-party Conversation Understanding

AAAI 2025technical

Multi-modal multi-party conversation (MMC) is a less studied yet important topic of research due to that it well fits real-world scenarios and thus potentially has more widely-used applications. Compared with the traditional multi-modal conversations, MMC requires stronger character-centered underst…

2025

Hierarchical Memory Organization for Wikipedia Generation

ACL 2025long

Generating Wikipedia articles autonomously is a challenging task requiring the integration of accurate, comprehensive, and well-structured information from diverse sources. This paper introduces the Memory Organization-based Generation (MOG) framework, a novel approach to address these challenges by…

2025

Learning to Align Multi-Faceted Evaluation: A Unified and Robust Framework

ACL 2025finding

Large Language Models (LLMs) are being used more and more extensively for automated evaluation in various scenarios. Previous studies have attempted to fine-tune open-source LLMs to replicate the evaluation explanations and judgments of powerful proprietary models, such as GPT-4. However, these meth…

2025

Mixture of insighTful Experts (MoTE): The Synergy of Reasoning Chains and Expert Mixtures in Self-Alignment

ACL 2025long

As the capabilities of large language models (LLMs) continue to expand, aligning these models with human values remains a significant challenge. Recent studies show that reasoning abilities contribute significantly to model safety, while integrating Mixture-of-Experts (MoE) architectures can further…

Cited by 0SourcePDFScholar
2025

More Tokens, Lower Precision: Towards the Optimal Token-Precision Trade-off in KV Cache Compression

EMNLP 2025

As large language models (LLMs) process increasing context windows, the memory usage of KV cache has become a critical bottleneck during inference. The mainstream KV compression methods, including KV pruning and KV quantization, primarily focus on either token or precision dimensions separately. How

2025

ReAttention: Training-Free Infinite Context with Finite Attention Scope

ICLR 2025poster

The long-context capability of the Large Language Models (LLM) has made significant breakthroughs, but \textit{the maximum supported context length in length extrapolation} remains a critical bottleneck limiting their practical applications. The constraint of context length in LLMs arises from the s…

2025

RidgeLoRA: Matrix Ridge Enhanced Low-Rank Adaptation of Large Language Models

NeurIPS 2025spotlight

As one of the state-of-the-art parameter-efficient fine-tuning~(PEFT) methods, Low-Rank Adaptation (LoRA) enables model optimization with reduced computational cost through trainable low-rank matrix. However, the low-rank nature makes it prone to produce a decrease in the representation ability, lea…

Cited by 0SourceScholar
2025

Safe: Enhancing Mathematical Reasoning in Large Language Models via Retrospective Step-aware Formal Verification

ACL 2025long

Chain-of-Thought (CoT) prompting has become the de facto method to elicit reasoning capabilities from large language models (LLMs). However, to mitigate hallucinations in CoT that are notoriously difficult to detect, current methods such as process reward models (PRMs) or self-consistency operate as…

2025

Stepwise Reasoning Checkpoint Analysis: A Test Time Scaling Method to Enhance LLMs’ Reasoning

EMNLP 2025

Mathematical reasoning through Chain-of-Thought (CoT) has emerged as a powerful capability of Large Language Models (LLMs), which can be further enhanced through Test-Time Scaling (TTS) methods like Beam Search and DVTS. However, these methods, despite improving accuracy by allocating more computati

2025

Subtle Errors in Reasoning: Preference Learning via Error-injected Self-editing

ACL 2025long

Large Language Models (LLMs) have exhibited strong mathematical reasoning prowess, tackling tasks ranging from basic arithmetic to advanced competition-level problems. However, frequently occurring subtle yet critical errors, such as miscalculations or incorrect substitutions, limit the LLMs’ full p…

2025

ToolACE: Winning the Points of LLM Function Calling

ICLR 2025poster

Function calling significantly extends the application boundary of large language models (LLMs), where high-quality and diverse training data is critical for unlocking this capability. However, collecting and annotating real function-calling data is challenging, while synthetic data from existing pi…

Cited by 23SourcePDFScholar
2025

ToolFlow: Boosting LLM Tool-Calling Through Natural and Coherent Dialogue Synthesis

NAACL 2025long

Supervised fine-tuning (SFT) is a common method to enhance the tool calling capabilities of Large Language Models (LLMs), with the training data often being synthesized. The current data synthesis process generally involves sampling a set of tools, formulating a requirement based on these tools, and…

Cited by 4SourcePDFScholar
2025

WIKIGENBENCH:Exploring Full-length Wikipedia Generation under Real-World Scenario

COLING 2025main

It presents significant challenges to generate comprehensive and accurate Wikipedia articles for newly emerging events under real-world scenario. Existing attempts fall short either by focusing only on short snippets or by using metrics that are insufficient to evaluate real-world scenarios. In this…

2024

CHIQ: Contextual History Enhancement for Improving Query Rewriting in Conversational Search

EMNLP 2024main

In this paper, we study how open-source large language models (LLMs) can be effectively deployed for improving query rewriting in conversational search, especially for ambiguous queries. We introduce CHIQ, a two-step method that leverages the capabilities of LLMs to resolve ambiguities in the conver…

2024

Don’t Shoot The Breeze: Topic Continuity Model Using Nonlinear Naive Bayes With Attention

EMNLP 2024industry

Utilizing Large Language Models (LLM) as chatbots in diverse business scenarios often presents the challenge of maintaining topic continuity. Abrupt shifts in topics can lead to poor user experiences and inefficient utilization of computational resources. In this paper, we present a topic continuity…

2024

EWEK-QA : Enhanced Web and Efficient Knowledge Graph Retrieval for Citation-based Question Answering Systems

ACL 2024long

The emerging citation-based QA systems are gaining more attention especially in generative AI search applications. The importance of extracted knowledge provided to these systems is vital from both accuracy (completeness of information) and efficiency (extracting the information in a timely manner).…

2024

Evaluating Robustness of Generative Search Engine on Adversarial Factoid Questions

ACL 2024findings

Generative search engines have the potential to transform how people seek information online, but generated responses from existing large language models (LLMs)-backed generative search engines may not always be accurate. Nonetheless, retrieval-augmented generation exacerbates safety concerns, since…

Cited by 1SourcePDFScholar
2024

FollowBench: A Multi-level Fine-grained Constraints Following Benchmark for Large Language Models

ACL 2024long

The ability to follow instructions is crucial for Large Language Models (LLMs) to handle various real-world applications. Existing benchmarks primarily focus on evaluating pure response quality, rather than assessing whether the response follows constraints stated in the instruction. To fill this re…

2024

Learning to Edit: Aligning LLMs with Knowledge Editing

ACL 2024long

Knowledge editing techniques, aiming to efficiently modify a minor proportion of knowledge in large language models (LLMs) without negatively impacting performance across other inputs, have garnered widespread attention. However, existing methods predominantly rely on memorizing the updated knowledg…

2024

M4LE: A Multi-Ability Multi-Range Multi-Task Multi-Domain Long-Context Evaluation Benchmark for Large Language Models

ACL 2024long

Managing long sequences has become an important and necessary feature for large language models (LLMs). However, assessing their ability to handle long contexts remains a challenge. This paper introduces M4LE, a Multi-ability, Multi-range, Multi-task, Multi-domain benchmark for Long-context Evaluati…

2024

MT-Eval: A Multi-Turn Capabilities Evaluation Benchmark for Large Language Models

EMNLP 2024main

Large language models (LLMs) are increasingly used for complex multi-turn conversations across diverse real-world applications. However, existing benchmarks mainly focus on single-turn evaluations, overlooking the models’ capabilities in multi-turn interactions. To address this gap, we introduce , a…

2024

Memorize Step by Step: Efficient Long-Context Prefilling with Incremental Memory and Decremental Chunk

EMNLP 2024main

The evolution of Large Language Models (LLMs) has led to significant advancements, with models like Claude and Gemini capable of processing contexts up to 1 million tokens. However, efficiently handling long sequences remains challenging, particularly during the prefilling stage when input lengths e…

Cited by 6SourcePDFScholar
2024

Planning, Creation, Usage: Benchmarking LLMs for Comprehensive Tool Utilization in Real-World Complex Scenarios

ACL 2024findings

The recent trend of using Large Language Models (LLMs) as tool agents in real-world applications underscores the necessity for comprehensive evaluations of their capabilities, particularly in complex scenarios involving planning, creating, and using tools. However, existing benchmarks typically focu…

2024

Preparing Lessons for Progressive Training on Language Models

AAAI 2024technical

The rapid progress of Transformers in artificial intelligence has come at the cost of increased resource consumption and greenhouse gas emissions due to growing model sizes. Prior work suggests using pretrained small models to improve training efficiency, but this approach may not be suitable for ne…

2024

Prompt-Based Length Controlled Generation with Multiple Control Types

ACL 2024findings

Large language models (LLMs) have attracted great attention given their strong performance on a wide range of NLP tasks. In practice, users often expect generated texts to fall within a specific length range, making length controlled generation an important topic, especially for GPT-style models. Ex…

Cited by 7SourcePDFScholar
2024

ProxyQA: An Alternative Framework for Evaluating Long-Form Text Generation with Large Language Models

ACL 2024long

Large Language Models (LLMs) have succeeded remarkably in understanding long-form contents. However, exploring their capability for generating long-form contents, such as reports and articles, has been relatively unexplored and inadequately assessed by existing benchmarks. The prevalent evaluation m…

2024

Retrieval-based Disentangled Representation Learning with Natural Language Supervision

ICLR 2024spotlight

Disentangled representation learning remains challenging as the underlying factors of variation in the data do not naturally exist. The inherent complexity of real-world data makes it unfeasible to exhaustively enumerate and encapsulate all its variations within a finite set of factors. However, it…

Cited by 9SourcePDFScholar
2024

Unsupervised Extractive Summarization with Learnable Length Control Strategies

AAAI 2024technical

Unsupervised extractive summarization is an important technique in information extraction and retrieval. Compared with supervised method, it does not require high-quality human-labelled summaries for training and thus can be easily applied for documents with different types, domains or languages. Mo…

Cited by 3SourcePDFScholar
2024

Visually Guided Generative Text-Layout Pre-training for Document Intelligence

NAACL 2024long

Prior study shows that pre-training techniques can boost the performance of visual document understanding (VDU), which typically requires models to gain abilities to perceive and reason both document texts and layouts (e.g., locations of texts and table-cells). To this end, we propose visually guide…

2024

“Knowing When You Don’t Know”: A Multilingual Relevance Assessment Dataset for Robust Retrieval-Augmented Generation

EMNLP 2024finding

Retrieval-Augmented Generation (RAG) grounds Large Language Model (LLM) output by leveraging external knowledge sources to reduce factual hallucinations. However, prior work lacks a comprehensive evaluation of different language families, making it challenging to evaluate LLM robustness against erro…

2023

AdaTranS: Adapting with Boundary-based Shrinking for End-to-End Speech Translation

EMNLP 2023short findings

To alleviate the data scarcity problem in End-to-end speech translation (ST), pre-training on data for speech recognition and machine translation is considered as an important technique. However, the modality gap between speech and text prevents the ST model from efficiently inheriting knowledge fro…

Cited by 0SourceScholar
2023

AutoConv: Automatically Generating Information-seeking Conversations with Large Language Models

ACL 2023short

Information-seeking conversation, which aims to help users gather information through conversation, has achieved great progress in recent years. However, the research is still stymied by the scarcity of training data. To alleviate this problem, we propose AutoConv for synthetic conversation generati…

2023

DecompEval: Evaluating Generated Texts as Unsupervised Decomposed Question Answering

ACL 2023long

Existing evaluation metrics for natural language generation (NLG) tasks face the challenges on generalization ability and interpretability. Specifically, most of the well-performed metrics are required to train on evaluation datasets of specific NLG tasks and evaluation dimensions, which may cause o…

2023

Gradually Excavating External Knowledge for Implicit Complex Question Answering

EMNLP 2023long findings

Recently, large language models (LLMs) have gained much attention for the emergence of human-comparable capabilities and huge potential. However, for open-domain implicit question-answering problems, LLMs may not be the ultimate solution due to the reasons of: 1) uncovered or out-of-date domain know…

Cited by 0SourceScholar
2023

History, Present and Future: Enhancing Dialogue Generation with Few-Shot History-Future Prompt

ICASSP 2023accepted

Dialogue history and response in open-domain dialogue are loosely coupled. Generating informative responses solely based on the original dialogue history is not easy, as dialogue history may not contain enough information or it may contain irrelevant noises. Intuitively, if a generation model can fo…

Cited by 0SourceScholar
2023

HyperPELT: Unified Parameter-Efficient Language Model Tuning for Both Language and Vision-and-Language Tasks

ACL 2023findings

With the scale and capacity of pretrained models growing rapidly, parameter-efficient language model tuning has emerged as a popular paradigm for solving various NLP and Vision-and-Language (V&L) tasks. In this paper, we design a unified parameter-efficient multitask learning framework that works ef…

Cited by 17SourcePDFScholar
2023

Improving Factual Consistency for Knowledge-Grounded Dialogue Systems via Knowledge Enhancement and Alignment

EMNLP 2023long findings

Pretrained language models (PLMs) based knowledge-grounded dialogue systems are prone to generate responses that are factually inconsistent with the provided knowledge source. In such inconsistent responses, the dialogue models fail to accurately express the external factual knowledge they rely upon…

Cited by 0SourcecodeScholar
2023

KPT: Keyword-Guided Pre-training for Grounded Dialog Generation

AAAI 2023technical

Incorporating external knowledge into the response generation process is essential to building more helpful and reliable dialog agents. However, collecting knowledge-grounded conversations is often costly, calling for a better pre-trained model for grounded dialog generation that generalizes well w.…

Cited by 3SourcePDFScholar
2023

Learning Summary-Worthy Visual Representation for Abstractive Summarization in Video

IJCAI 2023poster

Multimodal abstractive summarization for videos (MAS) requires generating a concise textual summary to describe the highlights of a video according to multimodal resources, in our case, the video content and its transcript. Inspired by the success of the large-scale generative pre-trained language m…

Cited by 3SourcePDFScholar
2023

Lexicon-injected Semantic Parsing for Task-Oriented Dialog

ICASSP 2023accepted

Recently, semantic parsing using hierarchical representations for dialog systems has captured substantial attention. Task-Oriented Parse (TOP), a tree representation with intents and slots as labels of nested tree nodes, has been proposed for parsing user utterances. Previous TOP parsing methods are…

Cited by 0SourceScholar
2023

MoralDial: A Framework to Train and Evaluate Moral Dialogue Systems via Moral Discussions

ACL 2023long

Morality in dialogue systems has raised great attention in research recently. A moral dialogue system aligned with users’ values could enhance conversation engagement and user connections. In this paper, we propose a framework, MoralDial to train and evaluate moral dialogue systems. In our framework…

2023

NewsDialogues: Towards Proactive News Grounded Conversation

ACL 2023findings

Hot news is one of the most popular topics in daily conversations. However, news grounded conversation has long been stymied by the lack of well-designed task definition and scarce data. In this paper, we propose a novel task, Proactive News Grounded Conversation, in which a dialogue system can proa…

2023

One Cannot Stand for Everyone! Leveraging Multiple User Simulators to train Task-oriented Dialogue Systems

ACL 2023long

User simulators are agents designed to imitate human users; recent advances have found that Task-oriented Dialogue (ToD) systems optimized toward a user simulator could better satisfy the need of human users. However, this might result in a sub-optimal ToD system if it is tailored to only one ad hoc…

Cited by 16SourcePDFScholar
2023

Reusing Pretrained Models by Multi-linear Operators for Efficient Training

NeurIPS 2023poster

Training large models from scratch usually costs a substantial amount of resources. Towards this problem, recent studies such as bert2BERT and LiGO have reused small pretrained models to initialize a large model (termed the ``target model''), leading to a considerable acceleration in training. Despi…

Cited by 16SourcePDFScholar
2023

SongRewriter: A Chinese Song Rewriting System with Controllable Content and Rhyme Scheme

ACL 2023findings

Although lyrics generation has achieved significant progress in recent years, it has limited practical applications because the generated lyrics cannot be performed without composing compatible melodies. In this work, we bridge this practical gap by proposing a song rewriting system which rewrites t…

2023

Structured Pruning for Efficient Generative Pre-trained Language Models

ACL 2023findings

The increasing sizes of large generative Pre-trained Language Models (PLMs) hinder their deploymentin real-world applications. To obtain efficient PLMs, previous studies mostly focus on pruning the attention heads and feed-forward networks (FFNs) of the Transformer. Nevertheless, we find that in gen…

2023

TRIGO: Benchmarking Formal Mathematical Proof Reduction for Generative Language Models

EMNLP 2023long main

Automated theorem proving (ATP) has become an appealing domain for exploring the reasoning ability of the recent successful generative language models. However, current ATP benchmarks are mainly focus on symbolic inference, but rarely involve the understanding of complex number combination reasoni…

Cited by 0SourcecodeScholar
2023

Wukong-Reader: Multi-modal Pre-training for Fine-grained Visual Document Understanding

ACL 2023long

Unsupervised pre-training on millions of digital-born or scanned documents has shown promising advances in visual document understanding (VDU). While various vision-language pre-training objectives are studied in existing solutions, the document textline, as an intrinsic granularity in VDU, has seld…

Cited by 12SourcePDFScholar
2023

mCLIP: Multilingual CLIP via Cross-lingual Transfer

ACL 2023long

Large-scale vision-language pretrained (VLP) models like CLIP have shown remarkable performance on various downstream cross-modal tasks. However, they are usually biased towards English due to the lack of sufficient non-English image-text pairs. Existing multilingual VLP methods often learn retrieva…

2022

Achieving Reliable Human Assessment of Open-Domain Dialogue Systems

ACL 2022long

Evaluation of open-domain dialogue systems is highly challenging and development of better techniques is highlighted time and again as desperately needed. Despite substantial efforts to carry out reliable live evaluation of systems in recent competitions, annotations have been abandoned and reported…

2022

COPEN: Probing Conceptual Knowledge in Pre-trained Language Models

EMNLP 2022main

Conceptual knowledge is fundamental to human cognition and knowledge bases. However, existing knowledge probing works only focus on evaluating factual knowledge of pre-trained language models (PLMs) and ignore conceptual knowledge. Since conceptual knowledge often appears as implicit commonsense beh…

2022

ClusterFormer: Neural Clustering Attention for Efficient and Effective Transformer

ACL 2022long

Recently, a lot of research has been carried out to improve the efficiency of Transformer. Among them, the sparse pattern-based method is an important branch of efficient Transformers. However, some existing sparse methods usually use fixed patterns to select words, without considering similarities…

2022

Compilable Neural Code Generation with Compiler Feedback

ACL 2022findings

Automatically generating compilable programs with (or without) natural language descriptions has always been a touchstone problem for computational linguistics and automated software engineering. Existing deep-learning approaches model code generation as text generation, either constrained by gramma…

Cited by 73SourcePDFScholar
2022

Compression of Generative Pre-trained Language Models via Quantization

ACL 2022long

The increasing size of generative Pre-trained Language Models (PLMs) have greatly increased the demand for model compression. Despite various methods to compress BERT or its variants, there are few attempts to compress generative PLMs, and the underlying difficulty remains unclear. In this paper, we…

Cited by 101SourcePDFScholar
2022

Controlled Text Generation Using Dictionary Prior in Variational Autoencoders

ACL 2022findings

While variational autoencoders (VAEs) have been widely applied in text generation tasks, they are troubled by two challenges: insufficient representation capacity and poor controllability. The former results from the posterior collapse and restrictive assumption, which impede better representation l…

Cited by 12SourcePDFScholar
2022

Enabling Multimodal Generation on CLIP via Vision-Language Knowledge Distillation

ACL 2022findings

The recent large-scale vision-language pre-training (VLP) of dual-stream architectures (e.g., CLIP) with a tremendous amount of image-text pair data, has shown its superiority on various multimodal alignment tasks. Despite its success, the resulting models are not capable of multimodal generative ta…

Cited by 109SourcePDFScholar
2022

Exploring extreme parameter compression for pre-trained language models

ICLR 2022poster

Recent work explored the potential of large-scale Transformer-based pre-trained models, especially Pre-trained Language Models (PLMs) in natural language processing. This raises many concerns from various perspectives, e.g., financial costs and carbon emissions. Compressing PLMs like BERT with neg…

2022

FPT: Improving Prompt Tuning Efficiency via Progressive Training

EMNLP 2022finding

Recently, prompt tuning (PT) has gained increasing attention as a parameter-efficient way of tuning pre-trained language models (PLMs). Despite extensively reducing the number of tunable parameters and achieving satisfying performance, PT is training-inefficient due to its slow convergence. To impro…

2022

FreeTransfer-X: Safe and Label-Free Cross-Lingual Transfer from Off-the-Shelf Models

NAACL 2022findings

Cross-lingual transfer (CLT) is of various applications. However, labeled cross-lingual corpus is expensive or even inaccessible, especially in the fields where labels are private, such as diagnostic results of symptoms in medicine and user profiles in business. Nevertheless, there are off-the-shelf…

2022

From Fully Trained to Fully Random Embeddings: Improving Neural Machine Translation with Compact Word Embedding Tables

AAAI 2022technical

Embedding matrices are key components in neural natural language processing (NLP) models that are responsible to provide numerical representations of input tokens (i.e. words or subwords). In this paper, we analyze the impact and utility of such matrices in the context of neural machine translation…

2022

G-MAP: General Memory-Augmented Pre-trained Language Model for Domain Tasks

EMNLP 2022main

General pre-trained language models (PLMs), such as BERT, have achieved remarkable performance on various NLP tasks. Recently, domain-specific PLMs have been proposed to boost the task performance of specific domains (e.g., biomedical and computer science) by continuing to pre-train general PLMs wit…

2022

How Pre-trained Language Models Capture Factual Knowledge? A Causal-Inspired Analysis

ACL 2022findings

Recently, there has been a trend to investigate the factual knowledge captured by Pre-trained Language Models (PLMs). Many works show the PLMs’ ability to fill in the missing factual words in cloze-style prompts such as ”Dante was born in [MASK].” However, it is still a mystery how PLMs generate the…

Cited by 54SourcePDFScholar
2022

Hyperlink-induced Pre-training for Passage Retrieval in Open-domain Question Answering

ACL 2022long

To alleviate the data scarcity problem in training question answering systems, recent works propose additional intermediate pre-training for dense passage retrieval (DPR). However, there still remains a large discrepancy between the provided upstream signals and the downstream question-passage relev…

2022

LMTurk: Few-Shot Learners as Crowdsourcing Workers in a Language-Model-as-a-Service Framework

NAACL 2022findings

Vast efforts have been devoted to creating high-performance few-shot learners, i.e., large-scale pretrained language models (PLMs) that perform well with little downstream task training data. Training PLMs has incurred significant cost, but utilizing the few-shot learners is still challenging due to…

Cited by 20SourcePDFScholar
2022

LiteVL: Efficient Video-Language Learning with Enhanced Spatial-Temporal Modeling

EMNLP 2022main

Recent large-scale video-language pre-trained models have shown appealing performance on various downstream tasks. However, the pre-training process is computationally expensive due to the requirement of millions of video-text pairs and the redundant data structure of each video. To mitigate these p…

Cited by 18SourcePDFScholar
2022

MINER: Multi-Interest Matching Network for News Recommendation

ACL 2022findings

Personalized news recommendation is an essential technique to help users find interested news. Accurately matching user’s interests and candidate news is the key to news recommendation. Most existing methods learn a single user embedding from user’s historical behaviors to represent the reading inte…

Cited by 87SourcePDFScholar
2022

MTRec: Multi-Task Learning over BERT for News Recommendation

ACL 2022findings

Existing news recommendation methods usually learn news representations solely based on news titles. To sufficiently utilize other fields of news information such as category and entities, some methods treat each field as an additional feature and combine different feature vectors with attentive poo…

Cited by 38SourcePDFScholar
2022

Pan More Gold from the Sand: Refining Open-domain Dialogue Training with Noisy Self-Retrieval Generation

COLING 2022main

Real human conversation data are complicated, heterogeneous, and noisy, from which building open-domain dialogue systems remains a challenging task. In fact, such dialogue data still contains a wealth of information and knowledge, however, they are not fully explored. In this paper, we show existing…

2022

Pre-training Language Models with Deterministic Factual Knowledge

EMNLP 2022main

Previous works show that Pre-trained Language Models (PLMs) can capture factual knowledge. However, some analyses reveal that PLMs fail to perform it robustly, e.g., being sensitive to the changes of prompts when extracting factual knowledge. To mitigate this issue, we propose to let PLMs learn the…

2022

Read before Generate! Faithful Long Form Question Answering with Machine Reading

ACL 2022findings

Long-form question answering (LFQA) aims to generate a paragraph-length answer for a given question. While current work on LFQA using large pre-trained model for generation are effective at producing fluent and somewhat relevant content, one primary challenge lies in how to generate a faithful answe…

2022

Revisiting Pre-trained Language Models and their Evaluation for Arabic Natural Language Processing

EMNLP 2022main

There is a growing body of work in recent years to develop pre-trained language models (PLMs) for the Arabic language. This work addresses two major problems in existing Arabic PLMs that limit the progress of the Arabic NLU and NLG fields. First, existing Arabic PLMs are not well-explored and their…

2022

SPIRAL: Self-supervised Perturbation-Invariant Representation Learning for Speech Pre-Training

ICLR 2022poster

We introduce a new approach for speech pre-training named SPIRAL which works by learning denoising representation of perturbed data in a teacher-student framework. Specifically, given a speech utterance, we first feed the utterance to a teacher network to obtain corresponding representation. Then t…

2022

TGEA 2.0: A Large-Scale Diagnostically Annotated Dataset with Benchmark Tasks for Text Generation of Pretrained Language Models

NeurIPS 2022accept

In order to diagnostically analyze and improve the capability of pretrained language models (PLMs) in text generation, we propose TGEA 2.0, to date the largest dataset built on machine-authored texts by PLMs with fine-grained semantic annotations on a wide variety of pathological generation errors.…

2022

Towards Identifying Social Bias in Dialog Systems: Framework, Dataset, and Benchmark

EMNLP 2022finding

Among all the safety concerns that hinder the deployment of open-domain dialog systems (e.g., offensive languages, biases, and toxic behaviors), social bias presents an insidious challenge. Addressing this challenge requires rigorous analyses and normative reasoning. In this paper, we focus our inve…

2022

Triangular Transfer: Freezing the Pivot for Triangular Machine Translation

ACL 2022short

Triangular machine translation is a special case of low-resource machine translation where the language pair of interest has limited parallel data, but both languages have abundant parallel data with a pivot language. Naturally, the key to triangular machine translation is the successful exploitatio…

2022

UTC: A Unified Transformer With Inter-Task Contrastive Learning for Visual Dialog

CVPR 2022poster

Visual Dialog aims to answer multi-round, interactive questions based on the dialog history and image content. Existing methods either consider answer ranking and generating individually or only weakly capture the relation across the two tasks implicitly by two separate models. The research on a uni…

Cited by 57PDFScholar
2022

UniMS: A Unified Framework for Multimodal Summarization with Knowledge Distillation

AAAI 2022technical

With the rapid increase of multimedia data, a large body of literature has emerged to work on multimodal summarization, the majority of which target at refining salient information from textual and image modalities to output a pictorial summary with the most relevant images. Existing methods mostly…

2022

Universal Conditional Masked Language Pre-training for Neural Machine Translation

ACL 2022long

Pre-trained sequence-to-sequence models have significantly improved Neural Machine Translation (NMT). Different from prior works where pre-trained models usually adopt an unidirectional decoder, this paper demonstrates that pre-training a sequence-to-sequence model but with a bidirectional decoder c…

2022

bert2BERT: Towards Reusable Pretrained Language Models

ACL 2022long

In recent years, researchers tend to pre-train ever-larger language models to explore the upper limit of deep models. However, large language model pre-training costs intensive computational resources, and most of the models are trained from scratch without reusing the existing pre-trained models, w…

Cited by 86SourcePDFScholar
2021

A Mutual Information Maximization Approach for the Spurious Solution Problem in Weakly Supervised Question Answering

ACL 2021long

Weakly supervised question answering usually has only the final answers as supervision signals while the correct solutions to derive the answers are not provided. This setting gives rise to the spurious solution problem: there may exist many spurious solutions that coincidentally derive the correct…

2021

ALP-KD: Attention-Based Layer Projection for Knowledge Distillation

AAAI 2021technical

Knowledge distillation is considered as a training and compression strategy in which two neural networks, namely a teacher and a student, are coupled together during training. The teacher network is supposed to be a trustworthy predictor and the student tries to mimic its predictions. Usually, a stu…

2021

AutoTinyBERT: Automatic Hyper-parameter Optimization for Efficient Pre-trained Language Models

ACL 2021long

Pre-trained language models (PLMs) have achieved great success in natural language processing. Most of PLMs follow the default setting of architecture hyper-parameters (e.g., the hidden dimension is a quarter of the intermediate dimension in feed-forward sub-networks) in BERT. Few studies have been…

2021

BinaryBERT: Pushing the Limit of BERT Quantization

ACL 2021long

The rapid development of large pre-trained language models has greatly increased the demand for model compression techniques, among which quantization is a popular solution. In this paper, we propose BinaryBERT, which pushes BERT quantization to the limit by weight binarization. We find that a binar…

2021

Chinese WPLC: A Chinese Dataset for Evaluating Pretrained Language Models on Word Prediction Given Long-Range Context

EMNLP 2021main

This paper presents a Chinese dataset for evaluating pretrained language models on Word Prediction given Long-term Context (Chinese WPLC). We propose both automatic and manual selection strategies tailored to Chinese to guarantee that target words in passages collected from over 69K novels can only…

2021

DyLex: Incorporating Dynamic Lexicons into BERT for Sequence Labeling

EMNLP 2021main

Incorporating lexical knowledge into deep learning models has been proved to be very effective for sequence labeling tasks. However, previous works commonly have difficulty dealing with large-scale dynamic lexicons which often cause excessive matching noise and problems of frequent updates. In this…

2021

Generate & Rank: A Multi-task Framework for Math Word Problems

EMNLP 2021finding

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 expressions. However, mathematical expressions are prone to…

2021

GhostBERT: Generate More Features with Cheap Operations for BERT

ACL 2021long

Transformer-based pre-trained language models like BERT, though powerful in many tasks, are expensive in both memory and computation, due to their large number of parameters. Previous works show that some parameters in these models can be pruned away without severe accuracy drop. However, these redu…

Cited by 26SourcePDFScholar
2021

HopRetriever: Retrieve Hops over Wikipedia to Answer Complex Questions

AAAI 2021technical

Collecting supporting evidence from large corpora of text (e.g., Wikipedia) is of great challenge for open-domain Question Answering (QA). Especially, for multi-hop open-domain QA, scattered evidence pieces are required to be gathered together to support the answer extraction. In this paper, we prop…

Cited by 36SourcePDFScholar
2021

Improved OOD Generalization via Adversarial Training and Pretraing

ICML 2021spotlight

Recently, learning a model that generalizes well on out-of-distribution (OOD) data has attracted great attention in the machine learning community. In this paper, after defining OOD generalization by Wasserstein distance, we theoretically justify that a model robust to input perturbation also genera…

Cited by 86SourcePDFScholar
2021

Improving Unsupervised Question Answering via Summarization-Informed Question Generation

EMNLP 2021main

Question Generation (QG) is the task of generating a plausible question for a given <passage, answer> pair. Template-based QG uses linguistically-informed heuristics to transform declarative sentences into interrogatives, whereas supervised QG uses existing Question Answering (QA) datasets to train…

Cited by 53SourcePDFScholar
2021

Neural Machine Translation with Heterogeneous Topic Knowledge Embeddings

EMNLP 2021main

Neural Machine Translation (NMT) has shown a strong ability to utilize local context to disambiguate the meaning of words. However, it remains a challenge for NMT to leverage broader context information like topics. In this paper, we propose heterogeneous ways of embedding topic information at the s…

2021

Revisiting Robust Neural Machine Translation: A Transformer Case Study

EMNLP 2021finding

Transformers have brought a remarkable improvement in the performance of neural machine translation (NMT) systems but they could be surprisingly vulnerable to noise. In this work, we try to investigate how noise breaks Transformers and if there exist solutions to deal with such issues. There is a la…

2021

Reweighting Augmented Samples by Minimizing the Maximal Expected Loss

ICLR 2021poster

Data augmentation is an effective technique to improve the generalization of deep neural networks. However, previous data augmentation methods usually treat the augmented samples equally without considering their individual impacts on the model. To address this, for the augmented samples from the sa…

Cited by 24SourcePDFScholar
2021

Self-Supervised Quality Estimation for Machine Translation

EMNLP 2021main

Quality estimation (QE) of machine translation (MT) aims to evaluate the quality of machine-translated sentences without references and is important in practical applications of MT. Training QE models require massive parallel data with hand-crafted quality annotations, which are time-consuming and l…

Cited by 14SourcePDFScholar
2021

TGEA: An Error-Annotated Dataset and Benchmark Tasks for TextGeneration from Pretrained Language Models

ACL 2021long

In order to deeply understand the capability of pretrained language models in text generation and conduct a diagnostic evaluation, we propose TGEA, an error-annotated dataset with multiple benchmark tasks for text generation from pretrained language models (PLMs). We use carefully selected prompt wo…

2021

Towards Semantics-Enhanced Pre-Training: Can Lexicon Definitions Help Learning Sentence Meanings?

AAAI 2021technical

Self-supervised pre-training techniques, albeit relying on large amounts of text, have enabled rapid growth in learning language representations for natural language understanding. However, as radically empirical models on sentences, they are subject to the input data distribution, inevitably incorp…

2021

Uncertainty-Aware Balancing for Multilingual and Multi-Domain Neural Machine Translation Training

EMNLP 2021main

Learning multilingual and multi-domain translation model is challenging as the heterogeneous and imbalanced data make the model converge inconsistently over different corpora in real world. One common practice is to adjust the share of each corpus in the training, so that the learning process is bal…

Cited by 16SourcePDFScholar
2020

Bridging the Gap between Training and Inference for Neural Machine Translation (Extended Abstract)

IJCAI 2020poster

Neural Machine Translation (NMT) generates target words sequentially in the way of predicting the next word conditioned on the context words. At training time, it predicts with the ground truth words as context while at inference it has to generate the entire sequence from scratch. This discrepancy…

2020

DynaBERT: Dynamic BERT with Adaptive Width and Depth

NeurIPS 2020spotlight

The pre-trained language models like BERT, though powerful in many natural language processing tasks, are both computation and memory expensive. To alleviate this problem, one approach is to compress them for specific tasks before deployment. However, recent works on BERT compression usually compres…

2020

From Unsupervised Machine Translation to Adversarial Text Generation

ICASSP 2020accepted

We present a self-attention based bilingual adversarial text generator (B-GAN) which can learn to generate text from the encoder representation of an unsupervised neural machine translation system. B-GAN is able to generate a distributed latent space representation which can be paired with an attent…

Cited by 0SourceScholar
2016

Dropped pronoun generation for dialogue machine translation

ICASSP 2016accepted

Dropped pronoun (DP) is a common problem in dialogue machine translation, in which pronouns are frequently dropped in the source sentence and thus are missing in its translation. In response to this problem, we propose a novel approach to improve the translation of DPs for dialogue machine translati…

Cited by 0SourceScholar