Post-doctoral Research Fellow Database Group Department of Computer Science Hong Kong Baptist University Office: DLB625, HKBU, Kowloon Tong, Hong Kong Email: cslxsun (at) comp.hkbu.edu.hk

Biography

I am currently a post-doctoral research fellow at Department of Computer Science in Hong Kong Baptist University (HKBU), advised by Dr. Xin Huang. I obtained my PhD degree in Computer Science from HKBU in 2024, MSc degree in Computer Science from HKBU in 2019, and received my Bachelor degree in Information Management and Information Systems from Sichuan University (SCU) in 2018.

Research Interests

I am interested in Graph Algorithms, Complex Graph Mining, and Community Search. My current focuses include:

• Knowledge graph-based community search for GraphRAG.
• General interactive community search model design and implementation.
• Community search algorithms and index design in multilayer graphs.

Publications

1. Longxu Sun, Xin Huang, Zheng Wu, and Jianliang Xu. Efficient Cross-layer Community Search in Large Multilayer Graphs.
   Proc. of the IEEE 40th International Conference on Data Engineering (ICDE’24), Utrecht, Netherlands, pp. 2959–2971, 2024, Full paper. [Slides]
   

2. Xuliang Zhu, Xin Huang, Longxu Sun, and Jiming Liu. A Novel Graph Indexing Approach for Uncovering Potential COVID-19 Transmission Clusters.
   ACM Transactions on Knowledge Discovery from Data (TKDD), vol. 17, no. 2, 24:1–24:24, 2023, Full paper.
   

3. Longxu Sun, Xin Huang, Rong-Hua Li, Byron Choi, and Jianliang Xu. Index-based Intimate-Core Community Search in Large Weighted Graphs.
   IEEE Transactions on Knowledge and Data Engineering (TKDE), vol. 34, no. 9, pp. 4313–4327, 2022, Full paper.
   

4. Longxu Sun, Xin Huang, Rong-Hua Li, Jianliang Xu. Fast Algorithms for Intimate-Core Group Search in Weighted Graphs .
   Proc. of the 20th International Conference on Web Information Systems Engineering (WISE’19), Hong Kong, pp. 728–744, 2019, Full paper.
   

Honors and Awards

• RPg Research Performance Award, HKBU, COMP, 2021, 2024.

• Best Poster Award, HKBU, COMP PG day, 2023.

• Best Presentation Award, HKBU, COMP PG day, 2022.

• Excellent Teaching Assistant Performance Award, HKBU, COMP, 2021-2022.

• Teaching Assistant Performance Award, HKBU, COMP, 2020, 2023.

• Merit Scholarship, HKBU, 2018, 2019.

• Outstanding Graduates, Sichuan University, 2018.

Professional Experience:

Visiting Student, Computer Science, Hokkaido University, 2023.9 - 2023.10.

Research Assistant, Computer Science, Hong Kong Baptist University, 2019.9 - 2020.7.

Teaching Assistant

• HKBU COMP4035 Database System Implementation, Fall, 2023.

• HKBU COMP4116 Information Systems Management, Fall, 2021-2023.

• HKBU COMP4127 Information Security, Spring, 2022-2023.

• HKBU COMP7170 Data Security and Privacy, Spring, 2022-2023.

• HKBU COMP7850 Information Security Management, Spring, 2022-2023.

• HKBU COMP7640 Database Systems & Administration, Spring, 2021.

• HKBU COMP7880 E-Business Strategies, Fall, 2020-2021.

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