Publications and Patents

Publications

  1. J. Hao, Chuan Lei, V. Efthymiou, A. Quamar, F. Özcan, Y. Sun, W. Wang: MEDTO: Medical Data to Ontology Matching Using Hybrid Graph Neural Networks, SIGKDD 2021, Accepted PDF SLIDES

  2. A. Vretinaris, Chuan Lei, V. Efthymiou, X. Qin, F. Özcan: Medical Entity Disambiguation Using Graph Neural Networks, SIGMOD 2021: 2310-2318 PDF SLIDES

  3. O. Poppe, Chuan Lei, L. Ma, A. Rozet, E. Rundensteiner: To Share, or not to Share Online Event Trend Aggregation Over Bursty Event Streams, SIGMOD 2021: 1452-1464 PDF SLIDES

  4. F. Özcan, Chuan Lei, A. Quamar, V. Efthymiou: Semantic Enrichment of Data for AI Applications, Invited Paper, 5th DEEM@SIGMOD 2021 PDF SLIDES

  5. S. Ahmetaj, V. Efthymiou, R. Fagin, P. G. Kolaitis, Chuan Lei, F. Özcan, L. Popa: Ontology-Enriched Query Answering on Relational Databases, IAAI 2021: 15247-15254 PDF SLIDES CODE

  6. R. Alotaibi, Chuan Lei, A. Quamar, V. Efthymiou, F. Özcan: Property Graph Schema Optimization for Domain-Specific Knowledge Graphs, ICDE 2021: 924-935 PDF SLIDES

  7. J. Sen, Chuan Lei, A. Quamar, F. Özcan, V. Efthymiou, A. Dalmia, G. Stager, A. Mittal, D. Saha, K. Sankaranarayanan: ATHENA++: Natural Language Querying for Complex Nested SQL Queries, PVLDB 13(11): 2747-2759 (2020) PDF SLIDES DATA

  8. X. Han, L. Hu, J. Sen, Y. Dang, B. Gao, V. Isahagian, Chuan Lei, V. Efthymiou, F. Özcan, A. Quamar, Z. Huang, V. Muthusamy: Bootstrapping Natural Language Querying on Process Automation Data, IEEE SCC 2020: 170-177 PDF

  9. A. Rozet, O. Poppe, Chuan Lei, E. Rundensteiner: Muse: Multi-query Event Trend Aggregation, CIKM 2020: 2193-2196 (Best Short Paper Award) PDF SLIDES

  10. F. Özcan, A. Quamar, J. Sen, Chuan Lei, V. Efthymiou: State of the Art and Open Challenges in Natural Language Interfaces to Data, SIGMOD 2020 (Tutorial): 2629-2636 PDF SLIDES

  11. A. Quamar, Chuan Lei, D. Miller, F. Özcan, J. Kreulen, R. J. Moore, V. Efthymiou: An Ontology-Based Conversation System for Knowledge Bases. SIGMOD 2020: 361-376 PDF SLIDES
    Authors are listed in alphabetical order by authors' first names.

  12. Chuan Lei, V. Efthymiou, R. Geis and F. Özcan: Expanding Query Answers on Medical Knowledge Bases. EDBT 2020: 567-578 PDF SLIDES

  13. O. Poppe, Chuan Lei, E. A. Rundensteiner, and D. Maier: Event Trend Aggregation Under Rich Event Matching Semantics. SIGMOD 2019: 555-572 PDF SLIDES

  14. J. Sen, F. Özcan, A. Quamar, G. Stager, A. Mittal, M. Jammi, Chuan Lei, D. Saha, K. Sankaranarayanan: Natural Language Querying of Complex Business Intelligence Queries. SIGMOD 2019: 1997-2000 PDF, POSTER

  15. Chuan Lei, F. Özcan, A. Quamar, et al.: Ontology-Based Natural Language Query Interfaces for Data Exploration. Invited Paper, IEEE Data Eng. Bull. 41(3): 52-63 (2018) PDF

  16. O. Poppe, A. Rozet, Chuan Lei, E. A. Rundensteiner, and D. Maier: Sharon: Shared Online Event Sequence Aggregation. ICDE 2018: 737-748 PDF SLIDES

  17. O. Poppe, Chuan Lei, E. A. Rundensteiner, and D. Maier: GRETA: Graph-based Real-time Event Trend Aggregation. PVLDB 11(1): 80-92 (2018) PDF SLIDES

  18. O. Poppe, Chuan Lei, S. Ahmed, and E. A. Rundensteiner: Complete Event Trend Detection in High-Rate Event Streams. SIGMOD 2017: 109-124 PDF SLIDES

  19. O. Poppe, Chuan Lei, E. A. Rundensteiner, et al.: CAESAR: Context-Aware Event Stream Analytics for Urban Transportation Services. EDBT 2017: 590-593 PDF

  20. Z. Zhuang, Chuan Lei, E. A. Rundensteiner, and M. Y. Eltabakh: PRO: Preference-Aware Recurring Query Optimization. CIKM 2016: 2191-2196 PDF POSTER

  21. M. Ray, Chuan Lei, and E. A. Rundensteiner: Scalable Pattern Sharing over Event Streams. SIGMOD 2016: 495-510 PDF SLIDES

  22. M. Ray, Chuan Lei, and E. A. Rundensteiner: SPASS: Scalable Event Stream Processing Leveraging Sharing Opportunities. Invited Poster, DEBS 2016: 336-339 PDF POSTER

  23. O. Poppe, Chuan Lei, E. A. Rundensteiner, and D. Dougherty: Context-aware Event Stream Analytics. EDBT 2016: 425-436 PDF SLIDES

  24. E. A. Rundensteiner, O. Poppe, Chuan Lei, et al.: Exploiting Sharing Opportunities for Real-time Complex Event Analytics. Invited Paper, IEEE Data Eng. Bull. 38(4): 82-93 (2015) PDF

  25. Chuan Lei, Z. Zhuang, E. A. Rundensteiner, and M. Y. Eltabakh: Shared Execution of Recurring Workloads in MapReduce. PVLDB 8(7): 714-725 (2015) PDF

  26. Chuan Lei, E. A. Rundensteiner, and M. Y. Eltabakh: Redoop: Supporting Recurring Queries in Hadoop. EDBT 2014: 25-36 PDF

  27. Chuan Lei, Z. Zhuang, E. A. Rundensteiner, and M. Y. Eltabakh: Redoop Infrastructure for Recurring Big Data Queries. PVLDB 7(13): 1589-1592 (2014) PDF

  28. Chuan Lei, E. A. Rundensteiner: Robust Distributed Query Processing for Streaming Data. ACM Trans. Database Syst. 39(2):17 (2014) PDF

  29. Chuan Lei, E. A. Rundensteiner, and J. D. Guttman: Robust Distributed Stream Processing. ICDE 2013: 817-828 PDF

  30. R. Nehme, K. Works, Chuan Lei, E. A. Rundensteiner, and E. Bertino: Multi-route query processing and optimization. J. Comput. Syst. Sci. 79(3):312-329 (2013) PDF

Patents

  1. Hybrid Graph Neural Network
    Chuan Lei, J. Hao, V. Efthymiou, F. Özcan, A. Quamar
    Patent US App. 17/161093, 17/161152, 2021

  2. Guided Exploration for Conversational Business Intelligence
    A. Quamar, F. Özcan, Chuan Lei, V. Efthymiou, V. Meduri
    Patent US App. 17/188405, 2021

  3. Entity Disambiguation Using Graph Neural Networks
    Chuan Lei, A. Vretinaris, V. Efthymiou, F. Özcan
    Patent US App. 17/130107, 2020

  4. Reducing Response Time for Queries Directed to Domain-Specific Knowledge Graph using Property Graph Schema Optimization
    Chuan Lei, A. Quamar, V. Efthymiou, F. Özcan, R. Alotaibi
    Patent US App. 16/800392, 2020

  5. Query Relaxation Using External Domain Knowledge for Query Answering
    Chuan Lei, F. Özcan, D. Miller, J. Kreulen, R. Geis
    Patent US App. 16/537496, 2019

  6. Ontology-based Data Storage for Distributed Knowledge Bases
    A. Quamar, F. Özcan, R. Alotaibi, Chuan Lei
    Patent US App. 16/594391, 2019