LI Kai李锴PhD Candidate · UCAS × CityU Hong Kong中国科学院大学 × 香港城市大学 联合培养博士生

Publications发表论文

Building & Spatial Structure Understanding with Offset Tokens基于偏移量词元的建筑与空间结构理解

[1] Prompt-Driven Building Footprint Extraction in Aerial Images with Offset-Building Model K. Li, Y. Deng, Y. Kong, D. Liu, J. Chen, Y. Meng, J. Ma, C. Wang· IEEE TGRS, 2024

[2] PolyFootNet: Extracting Polygonal Building Footprints in Off-Nadir Remote Sensing Images K. Li, Y. Deng, J. Chen, Y. Meng, Z. Xi, J. Ma, C. Wang, M. Wang, X. Zhao· IEEE TGRS, 2025

[3] DragOSM: Extract Building Roofs and Footprints from Aerial Images by Aligning Historical Labels K. Li, X. Weng, Y. Deng, Y. Meng, C. Pang, G.-S. Xia, X. Zhao· arXiv, 2025

[4] ObliCity: A Benchmark and Baseline for Roof-to-Ground Projection Displacement Correction K. Li, Y. Deng, L. Deng, Z. Xi, C. Wang, J. Zhang, Y. Ji, Y. Meng, X. Zhao· arXiv, 2026

[5] LODEOT: Low-Dimensional and Efficient Offset Tokens for Building Footprint Extraction from Off-Nadir Imagery K. Li, et al.· 2025

Multimodal LLMs for 3D Scene Understanding, with Reinforcement Learning多模态大模型驱动的 3D 场景理解与强化学习

[6] Scenix: Sparse-View 3D Scene Reconstruction via Executable Scene Programs K. Li, L. Jiang, Z. Li, J. Dong, J. Zhang, Y. Yin, R. Zhang, K. Yan, X. Huang, et al.· arXiv, 2026

· Reinforcement-Learning-Driven, Sparse-View-Consistent Indoor Scene Reconstruction基于强化学习的稀疏视角一致性室内场景重建 On Working研究中

Current Focus: Memory in Video World Models当前重心：视频世界模型中的记忆机制

· Memory Mechanisms for Video World Models视频世界模型的记忆机制 On Working研究中

Other Collaborative Publications其他合作论文

[7] Remote-Sensing City Layout Extraction with MLLM Z. Zhou, K. Li, Y. Deng. arXiv preprint arXiv:2608.16484, 2026.

[8] ConsistNav: Closing the Action Consistency Gap in Zero-Shot Object Navigation with Semantic Executive Control H. Wang, Z. Li, Y. Zhang, Z. He, L. Jiang, K. Li, Y. Zhao, L. Fan, W. Hou, T. Liang, et al. arXiv preprint arXiv:2605.09869, 2026.

[9] DGTRSD and DGTRSCLIP: A Dual-Granularity Remote Sensing Image-Text Dataset and Vision-Language Foundation Model for Alignment W. Chen, Y. Deng, W. Jin, J. Chen, J. Chen, Y. Feng, Z. Xi, D. Liu, K. Li, Y. Meng. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing (JSTARS), 2025.

[10] IRSAMap: Towards Large-Scale, High-Resolution Land Cover Map Vectorization Y. Meng, L. Deng, Z. Xi, J. Chen, J. Chen, A. Yue, D. Liu, K. Li, C. Wang, K. Li, et al. IEEE Transactions on Geoscience and Remote Sensing, 2025.

[11] PCP: A Prompt-Based Cartographic-Level Polygonal Vector Extraction Framework for Remote Sensing Images C. Wang, Z. Xi, D. Liu, Y. Feng, Y. Deng, K. Li, J. Chen, J. Chen, Y. Meng. IEEE Transactions on Geoscience and Remote Sensing, 2025.

[12] LRSCLIP: A Vision-Language Foundation Model for Aligning Remote Sensing Image with Longer Text W. Chen, J. Chen, Y. Deng, J. Chen, Y. Feng, Z. Xi, D. Liu, K. Li, Y. Meng. arXiv preprint arXiv:2503.19311, 2025.

[13] SayAnything: Audio-Driven Lip Synchronization with Conditional Video Diffusion J. Ma, S. Wang, J. Yang, J. Hu, J. Liang, G. Lin, K. Li, Y. Meng. arXiv preprint arXiv:2502.11515, 2025.

[14] CusMer: Multimodal Intent Recognition in Customer Service via Data Augment and LLM Merge Z. Li, B. Wu, Y. Zhang, X. Li, K. Li, W. Chen. Companion Proceedings of the ACM Web Conference (WWW Companion), 2025, pp. 3058-3062.

[15] SAMPolyBuild: Adapting the Segment Anything Model for polygonal building extraction C. Wang, J. Chen, Y. Meng, Y. Deng, K. Li, Y. Kong. ISPRS Journal of Photogrammetry and Remote Sensing, 2024, 218: 707-720.

[16] 基于边界曲线的多因素机场出租车管理系统模型 程荟璇, 贺益鑫, 李锴, 覃思义. 实验科学与技术, 2022, 20(5): 40-44.

[17] Land Price Assessment Based on Deep Neural Network A. Hou, J. Liu, Y. Tao, S. Jiang, K. Li, Z. Zheng, J. Xia, Y. He, M. Zhu, G. Zhou, et al. IGARSS 2019, Yokohama, Japan.

[18] Urban Functional Regions Discovering Based on Deep Learning F. Mou, R. Kong, K. Li, Z. Zheng, J. Xia, Y. He, M. Zhu, G. Zhou, H. Zhang, Z. Liu, et al. IGARSS 2019, Yokohama, Japan, pp. 9462-9465.

[19] A WordNet-Based Geospatial Web Services Search Method Supporting Quality of Service Constraints L. Jiang, K. Li, D. Liu, Y. Zhou, Z. Zheng, F. Huang. IGARSS 2019, Yokohama, Japan, pp. 863-866.

Education教育背景

• 2024 – Present Ph.D. Candidate in Data Science博士研究生，数据科学 — City University of Hong Kong (CityU) · School of Data Science香港城市大学（CityU）· 数据科学学院Supervised by Prof. Xiangyu Zhao, Applied Machine Learning Lab (AML).导师：赵翔宇 教授，应用机器学习实验室（AML）。Research on vision-language models and 3D scene understanding.研究方向：视觉语言大模型与三维场景理解。
• 2021 – Present Ph.D. Candidate (direct entry), Signal and Information Processing博士研究生（本科直博），信号与信息处理 — University of Chinese Academy of Sciences (UCAS) · Aerospace Information Research Institute中国科学院大学（UCAS）· 空天信息创新研究院Supervised by Prof. Zhongming Zhao and Prof. Yu Meng.导师：赵忠明 教授、孟瑜 教授。Research on building extraction from off-nadir remote sensing imagery.研究方向：偏移摄影视角下的遥感建筑物提取。
• Until 2021 B.Eng. in Space Information and Digital Technology工学学士，空间信息与数字技术 — University of Electronic Science and Technology of China (UESTC)电子科技大学（UESTC）Ranked 2nd in the major; recommended for direct PhD admission to UCAS.专业排名第 2；获推荐免试直接攻读博士学位（直博）。

Experience研究与实习经历

• 2025.10 – Present Research Intern, Omni Research Team研究实习生，Omni 研究团队 — Tencent腾讯Memory mechanisms for video world models — current focus.视频世界模型（Video World Model）的记忆机制研究 —— 当前重心。Reinforcement learning for sparse-view-consistent 3D indoor scene reconstruction; Scenix.基于强化学习的稀疏视角一致性三维室内场景重建；Scenix。Second collaboration with the team.第二次加入该团队。
• 2021 – Present Research Assistant, Off-Nadir Remote Sensing Group研究助理，偏移摄影遥感方向 — Aerospace Information Research Institute, Chinese Academy of Sciences中国科学院空天信息创新研究院Built the Offset Token research line: OBM, PolyFootNet, DragOSM, ObliCity/DragRoof, LODEOT.构建偏移量词元研究主线：OBM、PolyFootNet、DragOSM、ObliCity/DragRoof、LODEOT。
• 2021.05 – 2021.09 Computer Vision Algorithm Intern计算机视觉算法实习生 — Tencent腾讯Surveyed 3D object detection and 3D reconstruction algorithms.调研 3D 目标检测与 3D 重建相关算法。

Mentorship研究生指导

• Jiajun ZhangJiajun Zhang — M.Sc., City University of Hong Kong · co-mentored with Prof. Xiangyu Zhao香港城市大学硕士研究生 · 与赵翔宇教授联合指导Next position: Ph.D. student at Peking University.下一站：北京大学博士生。Google Scholar profileGoogle Scholar 主页
• Zigan ZhouZigan Zhou — M.Sc., City University of Hong Kong · co-mentored with Prof. Xiangyu Zhao香港城市大学硕士研究生 · 与赵翔宇教授联合指导Interned at the Chinese Academy of Sciences (CAS).曾于中国科学院实习。
• Weizhi ChenWeizhi Chen — University of Chinese Academy of Sciences (AIRCAS) · co-mentored with Prof. Jingbo Chen中国科学院大学（空天信息创新研究院）· 与陈静波教授联合指导Published two papers in IEEE JSTARS on CLIP-based remote sensing image-text alignment.以 CLIP 图文对齐为研究方向，发表两篇 IEEE JSTARS 论文。Now an LLM Algorithm Researcher at Zhonggong Education.现任中公教育大模型算法研究员。

Teaching教学经历

• Teaching Assistant, Optimization Methods助教，最优化方法 — Prof. Zhenjiang Zhao · University of Chinese Academy of Sciences赵振江 教授 · 中国科学院大学
• Teaching Assistant, Academic English助教，学术英语 — Prof. James · University of Chinese Academy of SciencesJames 教授 · 中国科学院大学

Awards & Honours获奖与荣誉

PhD Studies博士阶段

• WWW 2025 (CCF-A) Multimodal Dialogue Intent Recognition ChallengeWWW 2025（CCF-A）多模态对话系统意图识别挑战赛— Champion (1st Place), Final Round决赛第一名
• Tianzhi Cup 2023, Change Detection Track天智杯 2023 变化检测赛道— Runner-up (2nd Place), Final Round决赛第二名
• PIESAT Cup (Aerospace Hongtu Cup) 2022, Road Intersection & Road Extraction TrackPIESAT 杯（航天宏图杯）2022 道路交叉口及道路提取赛道— 3rd Prize, Final Round决赛三等奖
• 3MT Competition with OBM三分钟论文竞赛（3MT，OBM）— Final Round, Top 10 · IGARSS 2025, Brisbane决赛 Top 10 · IGARSS 2025，布里斯班
• “Three-Good” Outstanding Student Award2025 年三好学生
• Corporate-Sponsored Scholarship企业奖学金— 2 recipients共 2 名
• Full Scholarship全额奖学金— City University of Hong Kong香港城市大学
• IEEE GRSS Chapter Excellence in Technical Communication Award, NomineeIEEE GRSS 分会年度优秀交流奖提名— 10 nominees, only Chinese nominee of the year共 10 人，唯一华人
• IGARSS 2025 Travel GrantIGARSS 2025 Travel Grant 资助— IEEE GRSSIEEE GRSS

Undergraduate Studies本科阶段

• China Undergraduate Mathematical Contest in Modeling (CUMCM)全国大学生数学建模大赛— National Second Prize国家二等奖
• Campus Academic Competitions校内奖项— 3rd prize or above, 12 times获得学术类比赛三等奖以上 12 次
• National Scholarship国家级奖学金— 1×1 次
• Outstanding Student Scholarship优秀学生奖学金— 3×3 次
• “UESTC Elite for Overseas Study”获评「成电留学精英」— 10 students campus-wide per year每年全校仅 10 人
• Recommended for Direct PhD Admission (Rank 2nd in Major)获推荐免试直博（专业排名第 2）— University of Electronic Science and Technology of China电子科技大学

Get in touch联系我

UCAS · AIRCAS · CityU AML Lab中国科学院大学 · 空天信息创新研究院 · 香港城市大学 AML 实验室
Beijing, China / Hong Kong SAR中国北京 / 中国香港
likai211@mails.ucas.ac.cn
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