I am currently a Researcher at Joy Future Academy. Previously, I was a Postdoctoral Fellow at the CityU–Oxford Joint Centre for Intelligent Multidimensional Data Analysis (CIMDA), Hong Kong, advised by Prof. Hong Yan. I received my B.S. degrees from the School of Mathematical Sciences and the School of Data Science, and my Ph.D. from the School of Mathematical Sciences, all at Fudan University.

You can find my publications on Google Scholar

🔥 News

📝 Publications

• IEEE TVT Evolving Collaborative Differential Evolution for Dynamic Multi-objective UAV Path Planning, Renjie Xu, Zhaoke Huang, Chenwei Wang, Hong Yan  · 

• AML Numerical radius approach to asymptotic stability of quaternion-tensor delay systems, Renjie Xu, Wanli Ma, Maolin Che

• NeurIPS 2025 DuSA: Fast and Accurate Dual-Stage Sparse Attention Mechanism Accelerating Both Training and Inference, Chong Wu, Jiawang Cao, Renjie Xu, Zhuoheng Ran, Maolin Che, Wenbo Zhu, Hong Yan

• LMA LU decomposition and generalized Autoone-Takagi decomposition of dual matrices and their applications, Renjie Xu, Yimin Wei, Hong Yan  · 
• IJPAM A Linearized Alternating Direction Method of Multipliers for Solving Complex Semi-Symmetric Tensor Equations and its Applications, Shenghao Feng, Yimin Wei, Renjie Xu, Eric King-wah Chu
• arXiv An Interpretable Two-Stage Feature Decomposition Method for Deep Learning-based SAR ATR, Chenwei Wang, Renjie Xu, Congwen Wu, Cunyi Yin, Ziyun Liao, Deqing Mao, Sitong Zhang, Hong Yan
• arXiv sparseGeoHOPCA: A Geometric Solution to Sparse Higher-Order PCA Without Covariance Estimation, Renjie Xu, Chong Wu, Maolin Che, Zhuoheng Ran, Yimin Wei, Hong Yan
• JCAM An ADMM-based interior point method for solving nonnegative tensor least squares problems and its applications, Shenghao Feng, Yimin Wei, Renjie Xu
• IEEE TGRS Limited-data SAR ATR causal method via dual-invariance intervention, Chenwei Wang, Renjie Xu, Yulin Huang, Jifang Pei, Chuan Huang, Wenqi Zhu, Jianyu Yang
• ACM-MM 2025 ELFATT: Efficient linear fast attention for vision transformers, Chong Wu, Maolin Che, Renjie Xu, Zhuoheng Ran, Hong Yan
• AML QR decomposition of dual matrices and its application, Renjie Xu, Tong Wei, Yimin Wei, Pengpeng Xie  · 
• arXiv QR Decomposition of Dual Matrices and its Application to Traveling Wave Identification in the Brain, Renjie Xu, Tong Wei, Yimin Wei, Pengpeng Xie  · 
• NFAO CUR and generalized CUR decompositions of quaternion matrices and their applications, Renjie Xu, Shenghao Feng, Yimin Wei, Hong Yan  · 
• CAM UTV decomposition of dual matrices and its applications, Renjie Xu, Tong Wei, Yimin Wei, Hong Yan
• PJO Randomized quaternion matrix UTV decomposition and its applications in quaternion matrix optimization, Renjie Xu, Yimin Wei
• JCAM Low-rank traffic matrix completion with marginal information, Zikai Xiong, Yimin Wei, Renjie Xu, Yanwei Xu

🎖 Honors and Awards

• 2024.02-2025.12 Research Talent Hub, Innovation and Technology Fund (ITF)
• 2024.01 Shanghai Outstanding Graduate Student
• 2019.10 Excellent Doctoral Research Promotion Program, Fudan University
• 2014-2016, 2018-2023 Scholarship for Outstanding Students, Fudan University
• 2015.10 Second Prize, “Shenzhen Cup” Mathematical Modeling Competition

📖 Educations

• 2017.09 - 2024.01, Doctor of Philosophy, School of Mathematical Sciences, Fudan University, Shanghai
• 2014.09 - 2017.06, Bachelor of Science, School of Data Sciences, Fudan University, Shanghai
• 2013.09 - 2017.06, Bachelor of Science, School of Mathematical Sciences, Fudan University, Shanghai

💬 Invited Talks

• 2025.06, CIMDA/Oxford Seminars, CIMDA
• 2022.09, Applied Math PhD Seminar, Fudan University

🏞️ Hobbies

• Hiking — Certified Outdoor Mountaineering Instructor by the China Mountaineering Association
• Football — Level 3 Referee certified by the Chinese Football Association
• Rowing — Star 3 Qualification by the China Rowing Association