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Qihang Fan

9 accepted papers

2026

Expand and Prune: Maximizing Trajectory Diversity for Effective GRPO in Generative Models

CVPR 2026

Group Relative Policy Optimization (GRPO) is a powerful technique for aligning generative models, but its effectiveness is bottlenecked by the conflict between large group sizes and prohibitive computational costs. In this work, we investigate the trade-off through empirical studies, yielding two ke

Cited by 0SourceScholar
2025

DiCo: Revitalizing ConvNets for Scalable and Efficient Diffusion Modeling

NeurIPS 2025spotlight

Diffusion Transformer (DiT), a promising diffusion model for visual generation, demonstrates impressive performance but incurs significant computational overhead. Intriguingly, analysis of pre-trained DiT models reveals that global self-attention is often redundant, predominantly capturing local pat…

Cited by 0SourcecodeScholar
2025

InfiMM-WebMath-40B: Advancing Multimodal Pre-Training for Enhanced Mathematical Reasoning

EMNLP 2025

Pre-training on large, high-quality datasets is essential for improving the reasoning abilities of Large Language Models (LLMs), particularly in specialized fields like mathematics. However, the field of Multimodal LLMs (MLLMs) lacks a comprehensive, open-source dataset for mathematical reasoning. T

Cited by 0SourcePDFScholar
2025

Semantic Equitable Clustering: A Simple and Effective Strategy for Clustering Vision Tokens

ICCV 2025poster

The Vision Transformer (ViT) has gained prominence for its superior relational modeling prowess. However, its global attention mechanism's quadratic complexity poses substantial computational burdens. A common remedy spatially groups tokens for self-attention, reducing computational requirements. No…

Cited by 0SourcePDFScholar
2024

RMT: Retentive Networks Meet Vision Transformers

CVPR 2024poster

Vision Transformer (ViT) has gained increasing attention in the computer vision community in recent years. However the core component of ViT Self-Attention lacks explicit spatial priors and bears a quadratic computational complexity thereby constraining the applicability of ViT. To alleviate these i…

2023

Lightweight Vision Transformer with Bidirectional Interaction

NeurIPS 2023poster

Recent advancements in vision backbones have significantly improved their performance by simultaneously modeling images’ local and global contexts. However, the bidirectional interaction between these two contexts has not been well explored and exploited, which is important in the human visual syste…