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Xiaojun Meng

17 accepted papers

2026

Difficulty Is Not Enough: Curriculum Learning for LLMs Fine-tuning Must Consider Utility

AAAI 2026technical

Fine-tuning plays an essential role in improving the performance of large language models (LLMs) on specific tasks. A central challenge lies in designing data-efficient strategy to achieve better fine-tuning performance. Curriculum learning, which organizes data from easy to hard, has become a widel

Cited by 0SourcePDFScholar
2026

From Outcomes to Actions: Leveraging Hindsight for Long-Horizon Language Agent Training

ICML 2026poster

Reinforcement learning (RL) has become a widely adopted technique for improving large language models (LLMs) on complex tasks. Despite this progress, existing RL methods still face challenges in training agents with longer-horizon interactions. One major bottleneck is distinguishing the contribution…

Cited by 0SourceScholar
2026

MMIFEvol: Towards Evolutionary Multimodal Instruction Following

AAAI 2026technical

Multimodal Instruction Following serves as a fundamental capability of multimodal language models, involving accurate comprehension and execution of user-provided instructions. However, existing multimodal instruction-following datasets and benchmarks face the shortcomings outlined below: (a) Lack o

Cited by 0SourcePDFScholar
2025

AutoClean: LLMs Can Prepare Their Training Corpus

NAACL 2025system demonstrations

Recent studies highlight the reliance of Large Language Models (LLMs) on high-quality, diverse data for optimal performance. The data sourced from the Internet often aggregated into datasets like the Common Crawl corpus, presents significant quality variability and necessitates extensive cleaning. M…

Cited by 0SourcePDFScholar
2025

CDS: Data Synthesis Method Guided by Cognitive Diagnosis Theory

ACL 2025finding

Large Language Models (LLMs) have achieved significant advancements, but the increasing complexity of tasks and higher performance demands highlight the need for continuous improvement. Some approaches utilize synthetic data generated by advanced LLMs based on evaluation results to train models. How…

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

Sparsing Law: Towards Large Language Models with Greater Activation Sparsity

ICML 2025poster

Activation sparsity denotes the existence of substantial weakly-contributed neurons within feed-forward networks of large language models (LLMs), providing wide potential benefits such as computation acceleration. However, existing works lack thorough quantitative studies on this useful property, in…

2025

VideoLLM Knows When to Speak: Enhancing Time-Sensitive Video Comprehension with Video-Text Duet Interaction Format

EMNLP 2025

Recent researches on video large language models (VideoLLM) predominantly focus on model architectures and training datasets, leaving the interaction format between the user and the model under-explored. In existing works, users often interact with VideoLLMs by using the entire video and a query as

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

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
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

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

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
2022

Sememe Prediction for BabelNet Synsets using Multilingual and Multimodal Information

ACL 2022findings

In linguistics, a sememe is defined as the minimum semantic unit of languages. Sememe knowledge bases (KBs), which are built by manually annotating words with sememes, have been successfully applied to various NLP tasks. However, existing sememe KBs only cover a few languages, which hinders the wide…

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

Wukong: A 100 Million Large-scale Chinese Cross-modal Pre-training Benchmark

NeurIPS 2022accept

Vision-Language Pre-training (VLP) models have shown remarkable performance on various downstream tasks. Their success heavily relies on the scale of pre-trained cross-modal datasets. However, the lack of large-scale datasets and benchmarks in Chinese hinders the development of Chinese VLP models an…