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Yuan Qiu

https://QiuTedYuan.github.io/ (65) 848O 9O31
(yuan.qiu＠cnrsatcreate.sg).replace("＠","@")

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Education

Hong Kong University of Science and Technology
Ph.D. in Computer Science and Engineering [Verifiable Diploma] [PQE] [Thesis] Sept. 2019 - Aug. 2022
Supervised by Prof. Ke Yi
Hong Kong PhD Fellowship

M.Phil. in Computer Science and Engineering [Verifiable Diploma] [Thesis] Sept. 2017 - Aug. 2019
Supervised by Prof. Ke Yi
Postgraduate Studentship

B.Sc. in Math, Economics and Computer Science [Certificate] Sept. 2013 - Aug. 2017
GPA: 4.02/4.30
First Class Honors
S.S. Chern Class Outstanding Student
Academic Excellence Award
Academic Achievement Medal

Stony Brook University
International Exchange Program Sept. 2016 - Dec. 2016
GPA: 4.00/4.00

Work Experience

Research Fellow, SoC@NUS & CNRS@CREATE, Singapore. Jul. 2024 - Present
  • Keywords: Differential Privacy
Postdoctoral Fellow, CSE@HKUST, Hong Kong SAR, China. Jan. 2024 - Jun. 2024
  • Keywords: Differential Privacy, Federated Learning, Secure Multiparty Computation.
  • Researched on problems related to personalized differential privacy and federated learning.
Big Data Engineer, ByteDance, Hangzhou, China. Sept. 2022 - Sept. 2023
  • Keywords: Query Optimization, Distributed Databases, Workload Analysis.
  • Languages: C++, Java, Scala. [sample code]
  • Worked on feature development for ByteHouse, a commercial version of the ClickHouse database system.
  • Researched on cross-platform workload analysis and diagnosis, and implemented prototypes for query pattern finding and accelerating.
  • Implemented row-store feature for E-MapReduce Serveless StarRocks product.
Internship & TA
Intern Engineer, Alibaba Cloud, Hangzhou, China. April 2021 - August 2021
  • Keywords: Query Optimization, AI4DB, Data Sketching.
  • Languages: Java, Python.
  • Implemented data sketching algorithms into AnalyticDB database optimizer.
  • Researched on database optimization problems, including AI-based query optimization and adaptive query optimization through feedbacks.
Intern Engineer, Alibaba Cloud, Hangzhou, China. January 2019 - May 2019
  • Keywords: Query Optimization, Data Sketching, Approximate Query Processing.
  • Languages: Java, C++.
  • Implemented approximate query processing algorithms into AnalyticDB database optimizer.
  • Researched on cardinality estimation problems, including join size estimation and distinct value counting.
Teaching Assistant, CSE, HKUST, Hong Kong SAR, China. Fall 2017, Spring 2018, Fall 2018
  • Course: Honors Design and Analysis of Algorithms (COMP 3711H)
  • Keywords: Divide-and-Conquer, Dynamic Programming, Sorting, Graphs, etc.
  • Student Feedback Evaluations: [17F, 92.9/100][18S, 80/100][18F, 92.9/100]
Teaching Assistant, CSE, HKUST, Hong Kong SAR, China. Fall 2019, Fall 2020
  • Course: Big Data Computing (MSBD 5003)
  • Keywords: Massively Parallel Systems, Cloud Computing, Spark, etc.
Teaching Assistant, CSE, HKUST, Hong Kong SAR, China. Spring 2022
  • Course: Discrete Mathematical Tools for Computer Science (COMP 2711)
  • Keywords: Logic, Number Theory, Induction, Probabbility, etc.
Teaching Assistant, SZ-HK Collaborative Innovation Research Institude, HKUST, Hong Kong SAR, China. Summer 2022, Feb. 2022
  • Courses: Information Systems and Big Data, Basics of Cloud Computing and Big Data
  • Keywords: Cloud Computing, Spark, etc.
Teaching Assistant, Harbour Education, China. Summer 2021
  • Courses: Big Data Computing with Hadoop and Spark
  • Keywords: Cloud Computing, Hadoop, Spark, etc.
Undergraduate
Student Ambassador, Undergraduate Recruitment and Admissions Office, HKUST, Hong Kong SAR, China. Jan. 2016 - Aug. 2017
  • Prepared and participated in university events like open days and campus visits.
  • Hosted sharing sessions for prospectice students.
Math Tutor, Math Department, HKUST, Hong Kong SAR, China Oct. 2015 - Nov. 2015
  • Keywords: Linear Algebra, Probability and Statistics

Research

[DBLP] [ORCID] [Google Scholar] [Semantic Scholar]
  1. Yuan Qiu and Ke Yi. "Approximate DBSCAN under Differential Privacy." ACM SIGMOD International Conference on Management of Data (SIGMOD), June 2025. [PDF to appear]
  2. Dajun Sun, Wei Dong, Yuan Qiu and Ke Yi. "Personalized Truncation for Personalized Privacy." ACM SIGMOD International Conference on Management of Data (SIGMOD), June 2025. [PDF]
  3. Ziyue Huang, Yuan Qiu, Ke Yi and Graham Cormode. "Frequency Estimation Under Multiparty Differential Privacy: One-shot and Streaming." International Conference on Very Large Databases (VLDB), September 2022. [PDF] [Poster]
  4. Yuan Qiu, Wei Dong, Ke Yi, Bin Wu and Feifei Li. "Releasing Private Data for Numerical Queries." ACM SIGKDD Conference on Knowledge Discovery and Data Mining (KDD), August 2022. [PDF]
  5. Yuan Qiu, Yilei Wang, Ke Yi, Feifei Li, Bin Wu and Chaoqun Zhan. "Weighted Distinct Sampling: Cardinality Estimation for SPJ Queries." ACM SIGMOD International Conference on Management of Data (SIGMOD), June 2021. [PDF] [Full Version]
  6. Yuan Qiu, Serafeim Papadias and Ke Yi. "Streaming HyperCube: A Massively Parallel Stream Join Algorithm." International Conference on Extending DataBase Technology (EDBT), March 2019. Short paper. [PDF] [Poster]
Undergraduate Projects

Direction-based Trajectory Simplification, Undergraduate Research Opportunity Program
Supervised by Prof. Raymond Wong

Wi-Fi Tracking and User Analytics
Supervised by Prof. Gary Chan


Skills

  • Communication: Mandarin (native), English (fluent), Japanese (N2), Cantonese (basic)
  • Programming: Java (proficient), C++ (proficient), SQL (profecient), Scala (intermediate), Python (intermediate)
  • Tools: Git, Unix, Emacs, Latex, Markdown

Awards

Hong Kong PhD Fellowship, Research Grants Council, Hong Kong Sept. 2019 - Aug. 2022
Postgraduate Studentship, HKUST Sept. 2017 - Aug. 2018
Academic Achievement Medal, HKUST [Photo] Nov. 2017
Reaching Out Award, HKSAR Government Aug. 2017
Chern Class Achievement Scholarship (Outstanding), Math Department, HKUST [Link] Jul. 2017
First Runner-up in UG Math Competition, Math Department, HKUST [Certificate] May 2016
Epsilon Fund Award, Math Department, HKUST [Certificate] May 2016
The Cheng Foundation Scholarship, Cheng Foundation Sept. 2015 - May 2016
Kerry Holdings Limited Scholarship, Kerry Holdings Sept. 2013 - May 2015
First Prize in National Olympiad for Informatics, China Computer Federation [Certificate] Nov. 2009