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Xiansheng Chen

5 accepted papers

2026

Action-Sketcher: From Reasoning to Action via Visual Sketches for Robotic Manipulation

CVPR 2026

Long-horizon robotic manipulation is increasingly important for real-world deployment, requiring spatial disambiguation in complex layouts and temporal resilience under dynamic interaction. However, existing end-to-end and hierarchical Vision-Language-Action (VLA) policies often rely on text-only cu

Cited by 0SourcecodeScholar
2026

General Process Reward Modeling for Robotic Reinforcement Learning

CVPR 2026

The primary obstacle for applying reinforcement learning (RL) to real-world robotics is the design of effective reward functions. While recently learning-based Process Reward Models (PRMs) are a promising direction, they are often hindered by two fundamental limitations: their reward models lack ste

Cited by 0SourcecodeScholar
2026

LAST: Bridging Vision-Language and Action Manifolds via Gromov-Wasserstein Alignment

ICML 2026poster

We formulate the learning of generalist Vision-Language-Action (VLA) models as a Gromov-Wasserstein alignment problem, aiming to map semantically similar VL embeddings to physically similar motion primitives. However, solving this is challenging due to the mathematical heterogeneity between the doma…

Cited by 0SourceScholar
2025

Reason-RFT: Reinforcement Fine-Tuning for Visual Reasoning of Vision Language Models

NeurIPS 2025poster

Visual reasoning abilities play a crucial role in understanding complex multimodal data, advancing both domain-specific applications and artificial general intelligence (AGI). Existing methods enhance Vision-Language Models (VLMs) through Chain-of-Thought (CoT) supervised fine-tuning using meticulou…

Cited by 0SourceScholar
2025

Temporal Scaling Law for Large Language Models

EMNLP 2025

Recently, Large Language Models (LLMs) have been widely adopted in a wide range of tasks, leading to increasing attention towards the research on how scaling LLMs affects their performance. Existing works, termed Scaling Laws, have discovered that the final test loss of LLMs scales as power-laws wit