About Me

I am a PhD candidate in Computer Science at the University of New South Wales (UNSW), Sydney, supervised by Prof. Flora Salim, A/Prof. Hao Xue, and A/Prof. Imran Razzak. I hold a Master of Data Science and Decisions from UNSW and a Bachelor of Engineering in Software Engineering from Beihang University.

My research lies at the intersection of knowledge graphs, large language models, and multi-agent systems. I focus on retrieval-augmented generation for complex, multi-step reasoning over heterogeneous evidence (text, tables, and KGs), self-evolving agents, spatio-temporal reasoning, and trustworthy personal agentic AI.

News

• Three papers accepted at EMNLP 2026: SPLIT-RAG to the Main Conference, and GuardianAgent and RELOOP to Findings. (Aug 2026)
• KG-IRAG was selected for an oral presentation at The Web Conference (WWW) 2026. (Jun 2026)
• Released three new preprints: TrajPrism on language-grounded urban trajectories, STAR on failure-aware multi-agent routing, and MAGE on self-evolving agents with co-evolutionary knowledge graphs. (May 2026)
• Started in the GuardianAgent project as a Research Officer at UNSW. (Jul 2025)
• SSTKG accepted for oral presentation at WWW 2024. (2024)

Education

• 

  University of New South Wales, Sydney

  PhD in Computer Science

  Advisors: Prof. Flora Salim, A/Prof. Hao Xue, A/Prof. Imran Razzak

  Apr 2024 – Nov 2027 (expected)

• 

  University of New South Wales, Sydney

  Master of Data Science and Decisions — with Excellence

  WAM: 85.50

  Sep 2022 – Dec 2023

• 

  Beihang University, Beijing

  Bachelor of Engineering in Software Engineering

  GPA: 3.402/4.0 · Sino-French Engineer School (2017–2019)

  Sep 2017 – Jun 2022

Experience

• 

  University of New South Wales

  Research Officer — GuardianAgent

  Advisors: Prof. Salil Kanhere, Dr. Rahat Masood, Prof. Flora Salim

  Jul 2025 – Present

• 

  UNSW Sydney

  Casual Academic (Tutor)

  DATA9001 Data Science Fundamentals COMP9517 Computer Vision

  Jul 2024 – Present

• 

  Cresstec Pty Ltd

  Software Engineer Intern

  HDAC temperature control systems; React dashboards for energy & operational analytics.

  Dec 2023 – Present

• 

  Jina AI

  Software Engineer Intern

  CLIP-as-Service, DocsQA, cross-modal text–image search.

  Sep 2021 – Jun 2022

Publications

• Divide by Question, Conquer by Agent: SPLIT-RAG with Question-Driven Graph Partitioning

  Ruiyi Yang, Hao Xue, Imran Razzak, Shirui Pan, Hakim Hacid, Flora D. Salim.

  EMNLP, 2026.  Main Conference

  Paper Code

• GuardianAgent: Policy-Conditioned Risk-Adaptive Anonymization with Verified Adversarial Escalation

  Ruiyi Yang, Gayathri Lihinikaduarachchi, Rahat Masood, Flora D. Salim, Salil S. Kanhere.

  EMNLP, 2026.  Findings

• RELOOP: Recursive Retrieval with Multi-Hop Reasoner and Planners for Heterogeneous QA

  Ruiyi Yang, Hao Xue, Imran Razzak, Hakim Hacid, Flora D. Salim.

  EMNLP, 2026.  Findings

  Paper Code

• Beyond Single Pass, Looping Through Time: KG-IRAG with Iterative Knowledge Retrieval

  Ruiyi Yang, Hao Xue, Imran Razzak, Flora D. Salim.

  ACM Web Conference (WWW), 2026.  Oral

  ACM DL arXiv Code

• Route by State, Recover from Trace: STAR with Failure-Aware Markov Routing for Multi-Agent Spatiotemporal Reasoning

  Ruiyi Yang, Lihuan Li, Hao Xue, Flora D. Salim.

  Preprint, 2026.

  Paper Code

• MAGE: Multi-Agent Self-Evolution with Co-Evolutionary Knowledge Graphs

  Ruiyi Yang, Zechen Li, Hao Xue, Imran Razzak, Flora D. Salim.

  Preprint, 2026.

  Paper Code

• TrajPrism: A Multi-Task Benchmark for Language-Grounded Urban Trajectory Understanding

  Lihuan Li, Wilson Wongso, Baiyu Chen, Hao Xue, Ruiyi Yang, Yifan Duan, Xiachong Lin, Yang Song, Flora D. Salim.

  Preprint, 2026.

  Paper

• SSTKG: Simple Spatio-Temporal Knowledge Graph for Interpretable and Versatile Dynamic Information Embedding

  Ruiyi Yang, Flora D. Salim, Hao Xue.

  ACM Web Conference (WWW), 2024.  Oral

  Paper Code Video

Awards

• ACM Web Conference Oral Presentation — KG-IRAG (2026)
• UNSW Higher Degree by Research Scholarship (2024 – Present)
• ACM Web Conference Oral Presentation — SSTKG (2024)
• Master Degree with Excellence, UNSW (2023)

Service

• Reviewer / sub-reviewer for venues including WWW, SIGIR, and related ML/IR workshops.
• Co-supervision of "Taste of Research" projects with Prof. Flora Salim (UNSW).

Beyond Research

Outside of research, I enjoy languages — I studied French full-time for 1.5 years and hold the JLPT-N2 certificate in Japanese. I also co-authored Python Web Scraping: Practical Case Studies (Tsinghua University Press, 2023), contributing the chapter on application scenarios and data processing.

Beyond academia, I enjoy playing football and watching opera and ballet.