Publications and Patents

Publications

  1. A. Vretinaris, Chuan Lei, V. Efthymiou, X. Qin, F. Özcan: Medical Entity Disambiguation using Graph Neural Networks, SIGMOD 2021, Accepted PDF

  2. 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, Accepted PDF

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

  4. R. Alotaibi, Chuan Lei, A. Quamar, V. Efthymiou, F. Özcan: Property Graph Schema Optimization for Domain-Specific Knowledge Graphs, ICDE 2021, Accepted arxiv SLIDES

  5. 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

  6. 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

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

  8. 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

  9. 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.

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

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

  12. 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

  13. 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

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

  15. 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

  16. 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

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

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

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

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

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

  22. 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

  23. 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

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

  25. 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

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

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

  28. 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 Query Routing for Domain Specific Knowledge Bases
    A. Quamar, F. Özcan, Chuan Lei, R. Alotaibi
    Patent US App. 16/594391, 2019