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News

• 04/2023 [Publication] Our paper "Contact Tracing over Uncertain Indoor Positioning Data" is accepted by TKDE.
• 02/2023 [Publication] Our paper "Data Imputation for Sparse Radio Maps in Indoor Positioning" is accepted by ICDE 2023.
• 02/2023 [Publication] Our paper "Time-Constrained Indoor Keyword-aware Routing: Foundations and Extensions" has been accepted for publication in GeoInformatica.
• 12/2022 [Service] PC member of KDD 2023 (research track)
• 11/2022 [Service] PC member of PAKDD 2023
• 09/2022 [Affiliation] I am thrilled to announce that I started in a new position as Lecturer in Data Science at the Information School, the University of Sheffield, UK.
• 06/2022 [Service] PC member of ICDE 2023 (demo track)
• 05/2022 [Service] PC member of ADMA 2022
• 05/2022 [Service] Reviewer of IEEE Access
• 03/2022 [Service] PC member of APWeb-WAIM 2022
• 02/2022 [Service] PC member of IEEE BigData 2022
• 02/2022 [Service] PC member of CIKM 2022
• 02/2022 [Publication] Our paper "Continuous Social Distance Monitoring in Indoor Space" is accepted by VLDB 2022.

Read more

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Biography

I joined the Information School, the University of Sheffield as Lecturer in Data Science in Sep 2022. Before that, I worked as a Postdoc researcher at the Programming, Logic and Intelligent Systems (PLIS) research group in the Department of People and Technology, Roskilde University (RUC), Denmark, working on the research project Data Management for Indoor LBS (PI: Prof. Hua Lu). I graduated in 2019 with a PhD degree from Department of Computer Science and Engineering, The Hong Kong University of Science and Technology (HKUST), Hong Kong, under the supervision of Prof. Raymond Chi-Wing Wong. I obtained my BEng and MPhil degrees in Computer Science and Engineering from HKUST in 2013 and 2015, respectively.

In Fall 2019, I worked as a Visiting Lecturer at The Hong Kong Polytechnic University (PolyU). From Apr 2019 to Jul 2019, I was a visiting PhD student at the School of Computer Science and Engineering (SCSE), Nanyang Technological University (NTU), Singapore, hosted by Prof. Cheng Long. Besides, I was the hall tutor in Chan Sui Kau and Chan Lam Moon Chun Hall (Undergraduate Hall VII), HKUST, from Feb 2016 to Apr 2019.

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Research Interests

My research interests include data mining and analytics, data science, and big data. My research concerns foundations for efficient information retrieval, data management and knowledge discovery from different types of data such as spatial data, spatio-textual data, and spatio-temporal data. In particular, I worked on the problems of query processing on spatio-textual data, spatial co-location pattern mining, and in the area of indoor location-based services (LBS). Recently, I have also been working on applying machine learning models in databases to improve the quality and query efficiency of spatial data.

• Spatial Database (published in ICDE22, TKDE21, ICDE19, TKDE18, SSTD17)

• Data Mining (published in ICDE19)

• Indoor Location-based Services (published in ICDE23, VLDB22, SSTD19)

I am currently looking for full-time PhD students interested in data mining and analytics research. If you're interested in working with me, your're welcome to contact me via email. Please include your CV and transcripts for all degrees.

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Publications [DBLP, Google Scholar]

Conference:

1. Xiao Li, Huan Li, Harry Kai-Ho Chan, Hua Lu, and Christian S. Jensen
   "Data Imputation for Sparse Radio Maps in Indoor Positioning",
   In The 39th IEEE International Conference on Data Engineering (ICDE), page 2226-2239, 2023.
   (pdf) (extended version) (code)
2. Harry Kai-Ho Chan, Huan Li, Xiao Li, and Hua Lu,
   "Continuous Social Distance Monitoring in Indoor Space",
   In The 48th International Conference on Very Large Data Bases (VLDB), Vol. 15, No.7, pages 1390-1402, 2022.
   (pdf) (slides) (code)
3. Harry Kai-Ho Chan, Shengxin Liu, Cheng Long, and Raymond Chi-Wing Wong,
   "Cost-Aware and Distance-Constrained Collective Spatial Keyword Query (Extended Abstract)",
   In The 38th IEEE International Conference on Data Engineering (ICDE), 2022.
   (pdf)
4. Harry Kai-Ho Chan, Tiantian Liu, Huan Li, and Hua Lu,
   "Time-Constrained Indoor Keyword-aware Routing",
   In The 17th International Symposium on Spatial and Temporal Databases (SSTD), pages 74-84, 2021.
   (Selected as one of the best paper candidates)
   (pdf) (slides) (code) (video)
5. Harry Kai-Ho Chan, Cheng Long, Da Yan, and Raymond Chi-Wing Wong,
   "Fraction-Score: A New Support Measure for Co-location Pattern Mining",
   In The 35th IEEE International Conference on Data Engineering (ICDE), pages 1514–1525, 2019
   (pdf) (slides) (code)
6. Harry Kai-Ho Chan, Cheng Long, and Raymond Chi-Wing Wong,
   "On Generalizing Collective Spatial Keyword Queries (Extended Abstract)",
   In The 35th IEEE International Conference on Data Engineering (ICDE), pages 2115–2116, 2019
   (pdf) (poster)
7. Harry Kai-Ho Chan, Cheng Long, and Raymond Chi-Wing Wong,
   "Inherent-Cost Aware Collective Spatial Keyword Queries",
   In The 15th International Symposium on Spatial and Temporal Databases (SSTD), pages 357–375, 2017
   (pdf) (slides) (code)

Journal:

1. Tiantian Liu, Huan Li, Hua Lu, Muhammad Aamir Cheema, and Harry Kai-Ho Chan,
   "Contact Tracing over Uncertain Indoor Positioning Data",
   In IEEE Transactions on Knowledge and Data Engineering (TKDE) (Accepted)
   (extended version) (code)
2. Harry Kai-Ho Chan, Tiantian Liu, Huan Li, and Hua Lu,
   "Time-Constrained Indoor Keyword-aware Routing: Foundations and Extensions",
   In GeoInformatica (Special Issue of SSTD21 Best Papers)
   (pdf) (code)
3. Huan Li, Tiantian Liu, Harry Kai-Ho Chan, and Hua Lu,
   "Spatial data analysis for intelligent buildings: Awareness of context and data uncertainty",
   In Frontiers in Big Data, Rising Stars in Data Mining and Management 2022
   (pdf)
4. Harry Kai-Ho Chan, Shengxin Liu, Cheng Long, and Raymond Chi-Wing Wong,
   "Cost-Aware and Distance-Constrained Collective Spatial Keyword Query",
   In IEEE Transactions on Knowledge and Data Engineering (TKDE), Vol. 35, No. 2, pages 1324-1336, February 2023
   (pdf) (appendix) (code)
5. Harry Kai-Ho Chan, Cheng Long, and Raymond Chi-Wing Wong,
   "On Generalizing Collective Spatial Keyword Queries",
   In IEEE Transactions on Knowledge and Data Engineering (TKDE), Vol. 30, No. 9, pages 1712-1726, September 2018
   (pdf) (appendix) (code)

The code could also be found on GitHub: https://github.com/harryckh

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Professional Services

Session Chair: ICDE 2023, SSTD 2021, ...

Program Committee Member:
2023: KDD (research track), ICDE (demo track), PAKDD, IEEE BigData, DSAA, ALIAS (collocated with MDM), ...
2022: ICDE (demo track), CIKM, PAKDD, IEEE BigData, APWeb-WAIM, ADMA
2021: CIKM, SSTD

Conference External Reviewer:
2022: ICDE, SIGIR, SIGSPATIAL
2021: VLDB, ICDE, CIKM, DASFAA, PAKDD, SpatialDI, WISE
2020: IEEE BigData
2019: ICDE, CIKM, SIGSPATIAL, MDM, SSTD, PAKDD, ASONAM
2018: KDD, ICDE, SIGSPATIAL, ICDM, WWW, APWeb-WAIM, BigComp, PAKDD
2017: VLDB, CIKM, ICDM, SDM, WWW, MDM, SSTD, APWeb-WAIM, DSAA
2016: ICDE, APWeb, DSAA, SIGSPATIAL, EDB, IEEE BigData
2015: VLDB, ICDE, PAKDD, APWeb, CKIM, SIGSPATIAL
2014: VLDB

Journal Referee:
International Journal on Very Large Data Bases (VLDBJ)
IEEE Transactions on Knowledge and Data Engineering (TKDE)
Journal of Distributed and Parallel Databases (DAPD)
IEEE Access
Information Systems
GeoInformatica
Knowledge and Information Systems (KAIS)
ACM Transactions on Spatial Algorithms and Systems (TSAS)
Knowledge-Based Systems

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Teaching Activities

Lecturer in Sheffield

• INF4000 - Data Visualisation (Autumn 2022)
• INF4001 - Information Visualisation for Decision Makers (Spring 2023)
• INF6050 - Database Design (Spring 2023)

Lecturer in HKCC, PolyU

• SEHH1031 - Information Technology for Languages Studies (Fall 2019)

Teaching Assistant in HKUST

• COMP1942 - Exploring and Visualizing Data (Spring 2014, Spring 2015, Spring 2016, Spring 2017, Spring 2018, Spring 2019)
• COMP2711 - Discrete Mathematical Tools for Computer Science (Fall 2013, Fall 2016)
• COMP5331 - Knowledge Discovery in Databases (Fall 2017)

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Awards

1. Best Paper Candidate in SSTD 2021, Aug 2021
2. Research Travel Grant in ICDE 2019, HKUST, Apr 2019
3. Student Travel Grant, ICDE 2019, Mar 2019
4. Overseas Research Award, HKUST, Feb 2019
5. Li Po Chun Charitable Trust Fund Scholarships, Aug 2018
6. Research Travel Grant in SSTD 2017, HKUST, Oct 2017
7. Hong Kong ICT Awards 2017, Office of the Government Chief Information Officer
   • Best Student Invention Grand Award
   • Best Student Invention (Tertiary or Above) Gold Award
8. Postgraduate Studentship, HKUST, 2013-2019
9. Professor Samuel Chanson Best Teaching Assistant Award, HKUST, 2014
10. Academic Achievement Award for Graduating Students, CSE, HKUST, 2013
11. Dean's List, HKUST, 2011-2013 (Four out of six semesters)
12. HKMA Information Technology Management Club Scholarship, 2012
13. Hong Kong and Kowloon Electrical Appliances Merchants Association Scholarship, 2012

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Talks

1. DIREC Seminar 2021, Digital Research Centre Denmark
   Workshop: WS3 – Advanced and Efficient Big Data Management and Analysis
   Topic: Time-Constrained Indoor Keyword-aware Routing
   Date: Sep 13, 2021
2. Guest lecturer in GEODESIGN course, RUC
   Topic: Spatial Data and Databases
   Date: Feb 18, 2021
3. Research Seminar, RUC
   Topic: Co-location Pattern Mining
   Date: Feb 17, 2021
4. Guest speaker in ENGG1010 seminar, HKUST
   Theme: How engineers decide their major
   Topic: Sharing on Computer Science and Engineering
   Date: Mar 13, 2019

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