Mobile Computing:

• Lee, D.L. Mobile Data Management: from Human-Human to Machine-Machine Communication. 15th IEEE International Conference on Mobile Data Management (MDM), July 15-18, 2014, Brisbane, Australia.
• Lee, D.L. User Profiling and Personalized Information Delivery on the Static and Mobile Web. Proceedings of the 11th ACM International Workshop on Web Information and Data Management (WIDM), Nov, 2009. (Invited Paper) slides
• Lee, D.L. To Find or To be Found, That is the Question in Mobile Information Retrieval. Proceedings of the SIGIR 2008 Workshop on Mobile Information Retrieval (MobIR 2008), Singapore, July, 2008, 7-10. (Invited Paper) slides
• Lee, D.L., Zhu, M., and Hu, H. When Location-Based Services Meet Databases. Mobile Information Systems, Vol. 1, No. 2, 2005. (Invited Paper)
• Zheng, B., and Lee, D.L. Information Dissemination via Wireless Broadcast. Communications of the ACM (CACM), Vol. 48, No. 5, May, 2005, 105-110.
• D.L. Lee Technological and Business Challenges in Pervasive Computing. SAINT, 2002, 41-42. (Panel position paper)
• D.L. Lee, Lee, W.-C., Xu, J., and Zheng, B. Data Management in Location-Dependent Information Services. IEEE Pervasive Computing, Vol. 1, No. 3, 2002, 65-72.
• Xu, J., Zheng, B., Zhu, M., and Lee, D.L. Research Challenges in Information Access and Dissemination in a Mobile Environment. Proceedings of Pan-Yellow-Sea International Workshop on Information Technologies for Network Era (PYIWIT '02), Saga, Japan, March, 2002, 1-8. (Invited Paper)
• Xu, J., Lee, D.L., Hu, Q., and Lee, W.-C. Data Broadcast. In Handbook of Wireless Networks and Mobile Computing, Chapter 11, Ivan Stojmenovic, Ed., John Wiley and Sons, 2002, 243-265. (Invited Book Chapter) pre-publication manuscript
• Lee, D.L., Hu, Q., and Lee, W.-C. Power Conserving and Access Efficient Indexes for Wireless Computing. Chapter 18, Information Organization and Databases, Katsumi Tanaka, Shahram Ghandeharizadeh, and Yahiko Kambayashi, Eds, Kluwer Academic Publishers, Boston, MA, 2000, 249-264. (Invited Paper)

• Zhu, Q., Lee, D.L., and W.-C. Lee Collaborative Caching for Spatial Queries in Mobile P2P Networks. ICDE 2011 Hannover, Germany, Apr. 2011, 279-290.
• Leung, K.W.T., Lee, D.L., and Lee, W.-C. CLR: A Collaborative Location Recommendation Framework based on Co-Clustering. SIGIR 2011, Beijing, China, July, 2011, 305-314. Abstract
• Hu, H., Xu, J., and Lee, D.L. PAM: An Efficient and Privacy-Aware Monitoring Framework for Continuously Moving Objects. IEEE Transactions on Knowledge and Data Engineering (TKDE)}, Vol. 22, No. 3, Mar 2010, 404-419.
• Chen, Q., Lee, D.L., and Lee, W.C. Rule-Based WiFi Localization Methods. Proceedings of the 2008 IEEE/IFIP International Conference on Embedded and Ubiquitous Computing (EUC 2008), Vol. 1, Shanghai, China, Dec 2008, 252-258.
• Zheng, B., Lee, W.-C., and Lee, D.L. On Searching Continuous Nearest Neighbors in Wireless Data Broadcast Systems. IEEE Transactions on Mobile Computing Vol. 6, No. 7, July 2007, 748-761.
• Lee, D.L. and Chen, Q. A Model-Based Wi-Fi Localization Method. Proceedings of The Second International Conference on Scalable Information Systems (Infoscale 2007), Suzhou, China, June, 2007.
• Hu, H., Lee, D.L., and Lee, V.C.S. Distance Indexing on Road Networks. Proceedings of the 32nd International Conference on Very Large Data Bases (VLDB 2006), Seoul, Korea, Sept 2006, 894-905.
• Hu, H., Lee, D.L., and Xu, J. Fast Nearest Neighbor Search on Road Networks. Proceedings of the International Conference on Extending Database Technology (EDBT 2006), Munich, Germany, Mar 2006, 186-203.
• Hu, H., Xu, J., Wong, W.S., Zheng, B., Lee, D., and Lee, W.C. Proactive Caching for Spatial Queries in Mobile Environments. Proceedings of the International Conference on Data Engineering (ICDE'05), Tokyo, Japan, 2005, 403-414.
• Zheng, B., Lee, W.-C., and Lee, D.L. On Semantic Caching and Query Scheduling for Mobile Nearest-Neighbor Search. Wireless Network, Dec 2004, 653-664. pre-publication manuscript
• Zheng, B., Lee, W.-C., and Lee, D.L. Spatial Queries in Wireless Broadcast Systems. Wireless Network, Vol. 10, No. 6 , December, 2004, 723-736.
• Zhu, M., Papadias, D., Zhang, J., and Lee, D.L. Top-k Spatial Joins. IEEE Transactions on Knowledge and Data Engineering (TKDE), Vol. 17, No. 4, Apr. 2005, 567-579.
• Xu, J., Zheng, B., Lee, W.-C., and Lee, D.L. The D-tree: An Index Structure for Planar Point Queries in Location-Based Wireless Services. IEEE Transactions on Knowledge and Data Engineering, Vol. 16, No. 12, Dec 2004, 1526-1542.
• Lin, C.W., Hu, H. and Lee, D.L. Adaptive Realtime Bandwidth Allocation for Wireless Data Delivery. Wireless Network (WINET), Vol. 10, No. 2, Mar 2004, 103-120. pre-publication manuscript
• Zheng, B., Xu, J., Lee, W.C., and Lee, D.L. Energy-Conserving Air Indexes for Nearest Neighbor Search. Proceedings of the 9th International Conference on Extending Database Technology (EDBT 2004), Crete, Greece, Mar 2004, 48-66.
• Xu, J., Hu, Q., Lee, W.-C., and Lee, D.L. Performance Evaluation of an Optimal Cache Replacement Policy for Wireless Data Dissemination. IEEE Transactions on Knowledge and Data Engineering, Vol. 16, No. 1, Jan, 2004, 125-139.
• Ho, A.Y., and Lee, D.L. Data Indexing for Heterogeneous Multiple Broadcast Channels. Proceedings of the 5th International Conference on Mobile Data Management (MDM'04), Berkeley, USA, Jan 2004, 274-283.
• Hu, H., and Lee, D.L. Semantic Location Modeling for Location Navigation in Mobile Environment. Proceedings of the 5th International Conference on Mobile Data Management (MDM'04), Berkeley, USA, Jan 2004, 52-61.
• Lee, D.L., Hoi, K.K., Xu, J., and Wong, W.S.D. Web Browsing on Small Displays. IEEE Distributed Systems Online, Vol. 4, No. 10, Oct 2003.
• Hu, H., Zhu, M., Lee, D.L. Towards Real-time Parallel Processing of Spatial Queries. Proceedings of the 2003 International Conference on Parallel Processing (ICPP-03), Kaohsiung, Taiwan, ROC Oct, 2003.
• Zhang, J., Zhu, M.>, Papadias, D., Tao, Y., Lee, D. Location-Based Spatial Queries. ACM Conference on Management of Data (SIGMOD), 2003.
• Xu, J., Zheng, B., Lee, W.-C., and Lee, D.L. Energy Efficient Index for Querying Location-Dependent Data in Mobile Broadcast Environments. Proceedings of the International Conference on Data Engineering (ICDE'03), Bangalore, India, Mar, 2003, 239-250.
• Zheng, B., Lee, W.-C., and Lee, D.L. Spatial Index on Air. Proceedings of the IEEE International Conference on Pervasive Computing and Communications (PerCom 2003), Fort Worth, Texas, USA, Mar, 2003, 297-304.
• Xu, J., Lee, D.L., and Li, B. On Bandwidth Allocation for Data Dissemination in Cellular Mobile Networks. ACM/Kluwer Journal of Wireless Networks (WINET), Special Issue on Advances in Mobile and Wireless, Vol. 9, No. 2, Mar 2003, 103-116.
• Hoi, K.K., Xu, J., and Lee, D.L. Document Visualization on Small Displays. Proceedings of the 4th International Conference on Mobile Data Management (MDM'03), Melbourne, Australia, Jan 2003, 262-278.
• Zheng, B., Lee, W.-C., and Lee, D.L. Search K Nearest Neighbors on Air. Proceedings of the 4th International Conference on Mobile Data Management (MDM'03), Melbourne, Australia, Jan 2003, 181-195.
• Xu, J., Tang, X., and Lee, D.L. Performance Analysis of Location-dependent Cache Invalidation Schemes for Mobile Environments. IEEE Transactions on Knowledge and Data Engineering, Vol. 15, No. 2, Mar/Apr 2003, 474-488.
• Zheng, B., Xu, J., and Lee, D.L. Cache invalidation and replacement policies for location-dependent data in mobile environments. IEEE Transactions on Computers Special Issue on Database Management and Mobile Computing, Vol. 51, No.10, Oct 2002, 1141-1153.
• Zheng, B., Lee, D.L. Semantic Caching in Location-Dependent Query Processing. Proceedings of the Seventh International Symposium on Spatial and Temporal Databases (SSTD 2001), Los Angeles, CA, USA, July, 2001, 97-116.
• Zheng, B., Lee, D.L. Processing Location-Dependent Queries in a Multi-Cell Wireless Environment. Proceedings of the 2nd ACM International Workshop on Data Engineering for Wireless and Mobile Access (MobiDE01), Santa Barbara, CA, USA, May, 2001.
• Lin, C.W., and Lee, D.L. Adaptive Data Delivery in Wireless Communication Environments. Proceedings of the 20th International Conference on Distributed Computing Systems (ICDCS '2000), Taipei, Taiwan, April, 2000.
• Hu, Q., Lee, W.-C., and Lee, D.L. Power Conservative Multi-Attribute Queries on Data Broadcast. Proceedings of the International Conference on Data Engineering (ICDE'2000), San Diego, CA, February, 2000.
• Xu, J., and Lee, D.L. Querying Location-dependent Data in Wireless Cellular Environments. WAP Forum/W3C Workshop on Position Dependent Information Services, Sophia Antipolis, France, February 28, 2000.
• Hu, Q., Lee, W.-C., and Lee, D.L. Indexing Techniques for Wireless Data Broadcast under Data Clustering and Scheduling. Proceedings of The Eighth International Conference on Information and Knowledge Management (CIKM '99), Kansas City, Missouri, November 2-6, 1999.
• Hu, Q., Lee, W.-C., and Lee, D.L. Performance Evaluation of a Wireless Hierarchical Data Dissemination System. Proceedings of the The Fifth Annual International Conference on Mobile Computing and Networking (MOBICOM '99), Seattle, USA, August, 1999.
• Lee, W.-C., Hu, Q., and Lee, D.L. A Study on Channel Allocation for Data Dissemination in Mobile Computing Environments. Mobile Networks and Applications (MONET), Special Issue on Resource Management in Wireless Systems, Vol. 4, No. 2, 1999, 117-129.
• Hu, Q., W.-C., Lee, and Lee, D.L. A Hybrid Indexing Technique for Power Conserving Wireless Data Broadcast. Journal on Distributed and Parallel Databases. Vol. 9, No. 2, March 2001, 151-177.
• Lee, D.L., Hu, Q., and W.-C. Lee Indexing techniques for data broadcast on wireless channels. Proceedings of the Fifth International Conference on Foundations of Data Organization (FODO '98), Kobe, Japan, Nov 11-12, 1998, 175-182.
• Hu, Q., Lee, D.L., and W.-C. Lee Optimal Channel Allocation for Data Dissemination in Mobile Computing Environments. Proceedings of the 18th International Conference on Distributed Computing Systems (ICDCS '98), Amsterdam, The Netherlands, May 26 - 29, 1998, 480-487.
• Hu, Q., Lee, D.L., and W.-C. Lee A Comparison of Indexing Methods for Data Broadcast on the Air. Proceedings of the Proceedings of the 12th International Conference on Information Networking (ICOIN-12), Tokyo, Japan, Jan 1998, 656-659.
• Hu, Q. and Lee, D.L. Adaptive Cache Invalidation Methods in Mobile Environments. Proceedings of the 6th IEEE International Symposium on High Performance Distributed Computing Portland, Oregon, Aug. 1997, 264-273.
• Lee, W.-C., Hu, Q., and Lee, D.L. Channel Allocation Methods for Data Dissemination in Mobile Computing Environments. Proceedings of the 6th IEEE International Symposium on High Performance Distributed Computing Portland, Oregon, Aug. 1997, 274-281.
• Wang-chien Lee and Dik L. Lee, Signature Caching Techniques for Information Filtering in Mobile Environments. ACM Wireless Network, Vol. 5, No. 1, 1999, 57-67.
• Lee, W.-C., and Lee, D.L. Using Signature Techniques for Information Filtering in Wireless and Mobile Environments. Special Issue on Databases and Mobile Computing, Journal on Distributed and Parallel Databases, Vol. 4, No. 3, July 1996, 205-227.
• Lee, D.L., and Lee, W.-C., On Signature Caching of Wireless Broadcast and Filtering Services. Proceedings of the 2nd International Mobile Computing Workshop, Hsinchu, Taiwan, March 25-27, 1996, 15-24.

Information Retreival and Web-Wide Search

• Lee, D.L. Big Data Challenges in Recommendation Systems. Invited Presentation, Symposium on Big Data Challenges for Predictive Modeling of Complex Systems. Hong Kong, November 26-30, 2018. Slides, video
• Ke, Y., Deng, L., Ng, W., and Lee, D.L. Web Dynamics and their Ramifications for the Development of Web Search Engines. Computer Networks Journal, Special Issue on Web Dynamics, Vol. 50, No. 10, July 2006, 1430-1447.
• Lee, D.L., Zhao, J., and Luo, Q. Information Retrieval in a Peer-to-Peer Environment. Proceedings of the International Workshop on Peer-to-Peer Information Management, Hong Kong, May, 2006. (Invited Paper)

• Zhao, P., Zhu, H., Ng, W., and Lee, D.L. From GARCH to Neural Network for Volatility Forecast. AAAI, 2024.
• Zhu, H., Ge, H., Gu, X., Zhao, P., Lee, D.L. Influential Recommender System. Proceedings of the 39th IEEE International Conference on Data Engineering (ICDE 2023), Anaheim, California, USA, Apr. 2023.
• Zhu, H., Zhao, P., Lee, D.L., Chan, Y.P., and Hong, K. Breast Cancer Early Detection with Time Series Classification. CIKM 2022, Applied Research Track, Oct 2022.
• Zhu, H., Liu, Shihyang, Zhao, P., Chen, Y., and Lee, D.L. Forecasting Asset Dependencies to Reduce Portfolio Risk. AAAI, 2022.
• Zhao, H., Xu, X., Song, Y., Lee, D.L., Chen, Z., and Gao, H. Ranking Users in Social Networks with Motif-based PageRank. IEEE TKDE, Vol. 33, No. 5, May, 2021, 2179-2192.
• Zhao, H., Yao, Q., Song, Y., Kwok, J.T., and Lee, D.L. Side Information Fusion for Recommender Systems over Heterogeneous Information Network. ACM TKDD, Vol. 15, Issue 4, June, 2021, Article No.: 60, pp 1-32.
• Pfadler, A., Zhao, H., Wang, J., Wang, L., Huang, P., and Lee, D.L. Billion-scale Recommendation with Heterogeneous Side Information at Taobao. ICDE 2020, Industry and Application Track, Texas, USA, Apr. 2020, 1667-1676.
• Li, C., Liu, Z., Yu, M., Xu, Y., Zhao, H., Kang, G., Lee, D.L., Chen, Q., Huang, P. Multi-Interest Network with Dynamic Routing for Recommendation at Tmall. CIKM 2019, Beijing, China, Nov 2019.
• Zhao, H., Zhou, Y., Song, Y., and Lee, D.L. Motif Enhanced Recommendation over Heterogeneous Information Network. CIKM, Beijing, China, Nov 2019.
• Wang, J., Huang, P., Zhao, H., Zhang, Z., Zhao, B., and Lee, D.L. Billion-scale Commodity Embedding for E-commerce Recommendation in Alibaba. KDD 2018, Applied Data Science Track, Aug, 2018, 839-848.
• Zhao, H., Xu, X., Song, Y., Lee, D.L., Chen, Z. and Gao, H., Ranking Users in Social Networks with Higher-Order Structures. AAAI, 2018.
• Zhao, H., Yao, Q., Kwok, J., and Lee, D.L. Collaborative Filtering with Social Local Models. ICDM, Nov, 2017.
• Zhao, H., Yao, Q., Li, J., Song, Y., and Lee, D.L. Meta-Graph Based Recommendation Fusion over Heterogeneous Information Networks. KDD, Aug, 2017.
• Zhao, P., and Lee, D.L. How Much Novelty is Relevant?: It Depends on Your Curiosity. SIGIR, July, 2016, 315-324.
• Leung, K.W.T., Jiang, D., Lee, D.L., and Ng, W. Constructing Maintainable Semantic Relation Network fromAmbiguous Concepts in Web Content ACM Transactions on Internet Technology (TOIT), Vol. 16, No. 1, Feb, 2016, Article No. 6. ACM Digital Libraries
• Leung, K.W.T., Lee, D.L., and Lee, W.C. PMSE: A Personalized Mobile Search Engine. IEEE Transactions on Knowledge and Data Engineering (TKDE), Vol. 25, No. 4, April 2013, 820-834.
• Leung, K.W.T., Fung, H.Y., and Lee, D.L. Constructing Concept Relation Network for Search Recommender Systems. Proceedings of the 14th International Conference on Extending Database Technology (EDBT 2011), Uppsala, Sweden, Mar. 2011, 413-424.
• Leung, K.W.T, Lee, D.L., and Lee, W.C. Personalized Web Search with Location Preferences. Proceedings of the 26th IEEE International Conference on Data Engineering (ICDE 10), Long Beach, California, USA, March, 2010, 701-702.
• Leung, K.W.T, and Lee, D.L. Deriving Concept-based User Profiles from Search Engine Logs. IEEE Transactions on Knowledge and Data Engineering (TKDE), pwd Vol. 22, No. 7, Jul 2010, 969-982.
• Leung, K.W., Ng, W., and Lee, D.L. Personalized Concept-Based Clustering of Search Engine Queries. IEEE Transactions on Knowledge and Data Engineering (TKDE), Vol. 20, No. 11, Nov 2008, 1505-1518.
• Ng, W., Deng, L., and Lee, D.L. Mining User Preference Using Spy Voting for Search Engine Personalization. ACM Transactions on Internet Technology (TOIT), Vol. 7, No. 4, Article 19, Oct 2007, 19-17.
• Deng, L., Ng, W., Chai, X., and Lee, D.L. Spying Out Accurate User Preferences for Search Engine Adaptation. LNCS 3932, Advances in Web Mining and Web Usage Analysis, B. Mobasher et al., Eds., 87-103, 2006.
• Zhao, J., Lee, D.L., and Luo, Q. DPTree: A Distributed Pattern Tree Index for Partial-Match Queries in Peer-to-Peer Networks. Proceedings of the 10th International Conference on Extending Database Technology (EDBT 2006), Munich, Germany, Mar 2006, 515-532.
• Zhao, J., Lee, D.L., and Luo, Q. A Meta-Search Method with Clustering and Term Correlation. Proceedings of the Nineth International Conference on Database Systems for Advanced Applications (DASFAA '04), Jeju Island, Korea, Mar 2004.
• Tang, Q., Chai, X., Ng, W., and Lee, D.L. Applying Co-training to Clickthrough Data for Search Engine Adaptation. Proceedings of the Nineth International Conference on Database Systems for Advanced Applications (DASFAA '04), Jeju Island, Korea, Mar 2004.
• Chan, V.W., Leung, K.W., and Lee, D.L. Clustering Search Engine Query Log Containing Noisy Clickthroughs. Proceedings of the 2004 International Symposium on Applications and the Internet (SAINT 2004), Tokyo, Japan, Jan, 2004.
• Shen, Y., and Lee, D.L. An MDP-based Peer-to-Peer Search Server Network. Proceedings of the 3rd International Conference on Web Information Systems Engineering (WISE02) Singapore, Dec, 2002, 269-278.
• Shen, Y., and Lee, D.L. A Meta-Search Method Reinforced by Descriptors of Clusters. Proceedings of the 2nd International Conference on Web Information Systems Engineering, Kyoto, Japan, Dec, 2001, 129-136.
• Shen, Y., Lee, D.L., Zhang, L.W. A Distributed Search System Based on Markov Decision Process. Proceedings of the Fifth International Computer Science Conference (ICSC 99), Hong Kong, China, December 13-15, 1999, 73-82.
• Lam, S.L.Y, and Lee, D.L.,, Feature Reduction for Neural Network Based Text Categorization. Proceedings of the International Conference on Database Systems for Advanced Applications (DASFAA '99), Hsinchu, Taiwan, April, 1999. Mphil thesis (gzip postscrip)
• Lee, D.L., Chuang, H., and Seamons, K., Document Ranking and the Vector-Space Model. IEEE Software, Vol. 14, No. 2, Mar/Apr 1997, 67-75.
• Yuwono, B., and Lee, D.L. Server Ranking for Distributed Text Retrieval Systems on the Internet. Proceedings of the 5th International Conference on Database Systems for Advanced Applications (DASFAA '97), Melbourne, Australia, Apr. 1997, 41-49.
• Yuwono, B., and Lee, D.L. WISE: A World Wide Web Resource Database System. IEEE Transactions on Knowledge and Data Engineering, Special Section on Digital Library, Vol. 8, No. 4, Aug 1996, 548-554.
• Yuwono, B., and Lee, D.L. Search and Ranking Algorithms for Locating Resources on the World Wide Web. Proceedings of the the 12th International Conference on Data Engineering, New Orleans, Louisiana, Feb. 26 - March 1, 1996, 164-171.
• Lee, D.L., and Ren, L., "Document Ranking on Weight-Partitioned Signature Files," ACM Transactions on Information Systems, Vol. 14, No. 2, April 1996, 109-137.
• Yuwono, B., Lam, S.L.Y., Ying, J.H., and Lee, D.L. A World Wide Web Resource Discovery System, Proceedings of the Fourth International World Wide Web Conference, Boston, MA., Dec. 1995.
• Lee, D.L., "Massive Parallelism on the Hybrid Text Retrieval Machine," Information Processing and Management, Vol. 31, No. 6, 1995, 815-830.
• Lee, D.L., Kim, Y.M., and Gaurav P., "Efficient Signature File Methods for Text Retrieval," IEEE Transactions on Data and Knowledge Engineering, Vol. 7, No. 3, June, 1995, 423-435.
• Wong, P.W.Y. and Lee, D.L ., "Implementation of Partial Document Ranking Using Inverted Files", Information Processing and Management , Vol. 29, No. 5, pp. 647-669, Oct. 1993.
• Leng, C.-W., and Lee, D.L., "Optimal Weight Assignment for Signature Generation," ACM Transactions on Database Systems, Vol. 17, No. 2, June, 1992, 346-373.
• Lee, D.L., and Leng, C.-W. "A Partitioned Signature File Structure for Multiattribute and Text Retrieval," Proceedings of the Sixth International Conference on Data Engineering, Los Angeles, CA, Feb. 1990, 389-397.
• Lee, D.L., and Leng, C.-W. "Partitioned Signature File: Design Considerations and Performance Evaluation," ACM Transactions on Information Systems, Vol. 7, No. 2, Apr. 1989, 158-180.

Object-Oriented Databases

Deductive and Knowledge Databases