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Chunpu Xu

15 accepted papers

2026

MoEActok: A MoE-based Action Tokenizer for Vision-Language-Action Models

CVPR 2026

Recent works on vision-language-action (VLA) models have made great progress in exploring action tokenizers that convert continuous control signals into discrete tokens to align with LLM/VLM training paradigms.These approaches typically train a single tokenizer over entire manipulation trajectories,

Cited by 0SourcecodeScholar
2026

Probing Cultural Awareness in LLMs: A Case Study of Cross-Culture Aesthetic Stylistics

IJCAI 2026

Large Language Models (LLMs) are increasingly deployed in diverse cultural contexts, yet their ability to master aesthetic stylistics, i.e., the strategic use of language to evoke cultural resonance, remains underexplored. We curate C4Styli, a benchmark of highly stylized translated movie titles and

Cited by 0Scholar
2026

SCALE: Selective Resource Allocation for Overcoming Performance Bottlenecks in Mathematical Test-time Scaling

AAAI 2026technical

Test-time compute scaling has emerged as a powerful paradigm for enhancing mathematical reasoning in large language models (LLMs) by allocating additional computational resources during inference. However, current methods employ uniform resource distribution across all reasoning sub-problems, creati

Cited by 0SourcePDFScholar
2025

Boosting Policy and Process Reward Models with Monte Carlo Tree Search in Open-Domain QA

ACL 2025finding

The recent introduction of OpenAI’s O1/O3 model represents a significant milestone in developing strong reasoning capabilities in Large Language Models (LLMs). By introducing more computational budget during test-time, LLMs have the potential to explore more accurate and higher-quality solutions. Ho…

2025

LIMOPro: Reasoning Refinement for Efficient and Effective Test-time Scaling

NeurIPS 2025poster

Large language models (LLMs) have demonstrated remarkable reasoning capabilities through test-time scaling approaches, particularly when fine-tuned with chain-of-thought (CoT) data distilled from more powerful large reasoning models (LRMs). However, these reasoning chains often contain verbose eleme…

Cited by 0SourcecodeScholar
2025

MIO: A Foundation Model on Multimodal Tokens

EMNLP 2025

In this paper, we introduce MIO, a novel foundation model built on multimodal tokens, capable of understanding and generating speech, text, images, and videos in an end-to-end, autoregressive manner. While the emergence of large language models (LLMs) and multimodal large language models (MM-LLMs) p

2025

Towards Dynamic Theory of Mind: Evaluating LLM Adaptation to Temporal Evolution of Human States

ACL 2025long

As Large Language Models (LLMs) increasingly participate in human-AI interactions, evaluating their Theory of Mind (ToM) capabilities - particularly their ability to track dynamic mental states - becomes crucial. While existing benchmarks assess basic ToM abilities, they predominantly focus on stati…

2024

PopALM: Popularity-Aligned Language Models for Social Media Trendy Response Prediction

COLING 2024main

Social media platforms are daily exhibiting millions of events. To preliminarily predict the mainstream public reaction to these events, we study trendy response prediction to automatically generate top-liked user replies to social media events. While previous works focus on generating responses wit…

2022

Borrowing Human Senses: Comment-Aware Self-Training for Social Media Multimodal Classification

EMNLP 2022main

Social media is daily creating massive multimedia content with paired image and text, presenting the pressing need to automate the vision and language understanding for various multimodal classification tasks. Compared to the commonly researched visual-lingual data, social media posts tend to exhibi…

2022

Understanding Social Media Cross-Modality Discourse in Linguistic Space

EMNLP 2022finding

The multimedia communications with texts and images are popular on social media. However, limited studies concern how images are structured with texts to form coherent meanings in human cognition. To fill in the gap, we present a novel concept of cross-modality discourse, reflecting how human reader…

2021

#HowYouTagTweets: Learning User Hashtagging Preferences via Personalized Topic Attention

EMNLP 2021main

Millions of hashtags are created on social media every day to cross-refer messages concerning similar topics. To help people find the topics they want to discuss, this paper characterizes a user’s hashtagging preferences via predicting how likely they will post with a hashtag. It is hypothesized tha…

2021

Imagine, Reason and Write: Visual Storytelling with Graph Knowledge and Relational Reasoning

AAAI 2021technical

Visual storytelling is a task of creating a short story based on photo streams. Different from visual captions, stories contain not only factual descriptions, but also imaginary concepts that do not appear in the images. In this paper, we propose a novel imagine-reason-write generation framework (IR…

Cited by 39SourcePDFScholar
2020

Interactive Key-Value Memory-augmented Attention for Image Paragraph Captioning

COLING 2020main

Image paragraph captioning (IPC) aims to generate a fine-grained paragraph to describe the visual content of an image. Significant progress has been made by deep neural networks, in which the attention mechanism plays an essential role. However, conventional attention mechanisms tend to ignore the p…

Cited by 17SourcePDFScholar