About Me / 关于我

Zhjian Lai (赖志坚)
Postdoc / 博士后
Beijing International Center for Mathematical Research (BICMR) · Peking University
北京大学, 北京国际数学研究研究中心
Postdoc Advisor / 导师: Zaiwen Wen (文再文)
WeChat ID / 微信: EulerRiemann [QR code / 二维码]
E-mail / 邮箱: lai_zhijian at pku dot edu dot cn
Research Interests / 研究方向: Riemannian Optimization · Quantum Computation and Optimization · VQA

News and Updates / 新闻与动态

• [2025.08.27] ✅ Granted the NSFC Young Scientists Fund (Category C)
  Project name: Manifold Optimization Theory and Algorithms in Quantum Information Science
  获批国自然青年科学基金项目 (C类)[原青年科学基金项目]
  项目名称: 量子信息科学中的流形优化理论与算法研究

• [2025.08.12] 📄 New preprint~
  Zhijian Lai, Jiang Hu, Dong An, Zaiwen Wen (2025). Extended Parameter Shift Rules with Minimal Derivative Variance for Parameterized Quantum Circuits. arXiv: 2508.08802.
  在arXiv上传了一篇关于参数化量子电路梯度计算的新工作. arXiv: 2508.08802.

• [2025.06.13] 🧑🏻‍🏫 Lecture notes~
  It’s been one year since I started my postdoc at PKU. During this time, I also taught Calculus B for two semesters. The first round of prep took a ton of effort — I ended up putting together over a thousand pages of lecture notes (only Chinese) that can basically be used as a self-study textbook. I’d be really happy if more people could see them and make use of them.
  来 PKU 做博后正好一年, 这一年兼任了两个学期《高数 B》的教学. 第一次备课花了大量精力, 整理共千页的讲义 (仅中文), 完全可以用于自学. 如果有更多人能看到, 用到, 就很开心了.
  📘北京大学《高等数学》 (B) (一) 2024年秋学期 · 全部内容合订版 (1–6章), 课程主页
  📘北京大学《高等数学》 (B) (二) 2025年春学期 · 全部内容合订版 (7–12章), 课程主页

• [2025.03.06] 📄 New preprint~
  Zhijian Lai, Jiang Hu, Taehee Ko, Jiayuan Wu, Dong An (2025). Optimal Interpolation-based Coordinate Descent Method for Parameterized Quantum Circuits. arXiv: 2503.04620.
  在arXiv上传了一篇基于最优插值的坐标下降法 (OICD)的参数化量子电路优化的新工作. arXiv: 2503.04620.

• [2024.10.21] 📄 New publication~
  Xin Yang, Heng Chang, Zhijian Lai, Jinze Yang, Xingrun Li, Yu Lu, Shuaiqiang Wang, Dawei Yin, Erxue Min (2024). Hyperbolic contrastive learning for cross-domain recommendation. Proceedings of the 33rd ACM International Conference on Information and Knowledge Management. 2024.
  合作论文发表于 CIKM ‘24, 题为《使用双曲对比学习的跨域推荐》.

• [2024.08.04] 🛠️ Software~
  My PhD work — the Interior Point Newton Method on manifolds — has now been implemented in Manopt.jl. Feel free to check it out and use it! See documentation.
  博士期间的工作 - 黎曼内点法被 Manopt.jl 实现, 欢迎大家使用. 相关文档.

• [2024.05.14] 🌟 Milestone~
  Today, I start my postdoctoral life in Peking University. [Photo]
  今天正式入职北京大学, 开启博士后生活.

• [2024.03.25] 🎓 Graduation~
  Today, I obtained my Ph.D. certificate and graduated from Graduate School of Systems and Information Engineering, University of Tsukuba. Many thanks to my supervisor Prof. Akiko Yoshise.
  获得日本筑波大学博士学位, 衷心感谢我的博士导师吉濑章子教授的指导.

• [From 2024.03.05 to 2024.05.13]
  I am a research visitor in Beijing International Center for Mathematical Research (BICMR), Peking University.
  作为访问学者在北京大学数学研究中心进行合作研究.

• [2024.03.04] 📄 New publication~
  Zhijian Lai, Akiko Yoshise (2024). Riemannian Interior Point Methods for Constrained Optimization on Manifolds. Journal of Optimization Theory and Applications, 201(1), 433-469.
  新论文发表于 JOTA, 题为《黎曼流形上的有约束优化的内点法》.

• [2024.01.22] 🎓 Graduation~
  Today, I finished the final defense (slides) of my PhD. I am very thankful to Prof. Yoshise for her guidance over the past five years. I also appreciate the valuable suggestions that Prof. Sato provided for my thesis. [Photo]
  完成博士论文答辩, 感谢吉濑章子教授五年来的指导, 以及佐藤寛之教授对论文的宝贵建议.

• [2023.08] 🎤 Conference~
  I finished an oral presentation in the 10th International Congress on Industrial and Applied Mathematics (ICIAM) at Waseda University, Tokyo, Japan. [Photo] Many thanks to Prof. Hiroyuki Sato for inviting and organizing this wonderful minisymposium(Recent Advances on Manifold Optimization).
  在东京早稻田大学召开的第十届 ICIAM 大会上作口头报告, 感谢佐藤寛之教授的邀请与组织.

• [2023.08] 🎤 Conference~
  I presented a poster at the Summer School on Continuous Optimization and Related Fields, which was held by the Institute of Statistical Mathematics in Tachikawa, Tokyo. [Photo]
  在日本立川市统计数学研究所暑期学校展示学术海报.

• [2023.06] 🌐 Opened this website.
  建立个人主页.

Education / 教育背景

• Ph.D in Policy and Planning Sciences (2024.3)
  Graduate School of Systems and Information Engineering, University of Tsukuba, Japan.
  Supervisor Prof. Akiko Yoshise

• M.S in Policy and Planning Sciences (2021.3)
  Graduate School of Systems and Information Engineering, University of Tsukuba, Japan
  Supervisor Prof. Akiko Yoshise

• B.Mgmt. in Logistics Management (2017.6)
  School of Business Administration, Dongbei University of Finance and Economics, China