Selected Publications

Refereed Journals:

• Zhe Xu, Qiang Zhu, Yi Guo, TJ Giuli, Venkatesh Prasad, and Henry Huang, "Data Modeling and Optimization for Wireless Drive-Through Applications", IEEE Transactions on Intelligent Transportation Systems, Vol. 12, No. 4, pp. 1319 - 1330, 2011.

• Daniel Fabbri, Kristen Lefevre and Qiang Zhu, "PolicyReplay: Misconfiguration-Response Queries for Data Breach Reporting", Proc. of the VLDB Endowment (PVLDB) - Issue for 36th International Conference on Very Large Data Bases (VLDB), Vol. 3, No. 1, pp. 36 - 47, 2010.

• Dashiell Kolbe, Qiang Zhu and Sakti Pramanik, "Reducing Non-Determinism of k-NN Searching in Non-Ordered Discrete Data Spaces", Information Processing Letters (IPL), Vol. 110, No. 10, pp 420-423, 2010.

• Dashiell Kolbe, Qiang Zhu and Sakti Pramanik, "Efficient k-Nearest Neighbor Searching in Non-ordered Discrete Data Spaces", ACM Transactions on Information Systems (TOIS), Vol. 28, No. 2, pp 7:1 - 7:33, 2010.

• Zhewei Jiang, Cheng Luo, Wen-Chi Hou, Dunren Che and Qiang Zhu, "Efficient XML Tree Pattern Query Evaluation Using a Novel One-Phase Holistic Twig Join Scheme", The International Journal of Web Information Systems, Vol. 5, No. 3, pp 305-326, 2009.

• Qiang Zhu, Brahim Medjahed, A. Sharma and H. Huang, "The Collective Index: A Technique for Efficient Processing of Progressive Queries", The Computer Journal, Vol. 51, No. 6, pp 662-676, Oxford University Press, 2008 (The Wilkes Award 2008 winner).

• C. Luo, Z. Jiang, W.-C. Hou, F. Yan and Qiang Zhu, "A Relational Model for XML Structural Joins and Their Size Estimations", Knowledge and Information Systems, Vol. 16, No. 1, pp 97-127, 2008.

• Qiang Zhu, Y. Sun, S. Motheramgari, W.-C. Hou and S. Chen, "Building Multistate Cost Models for Dynamic Multidatabase Environments", International Journal of Information Tech., Vol. 14, No. 2, pp 24-55, 2008.

• Qiang Zhu, Jaidev Haridas and Wen-Chi Hou, "Query Optimization via Contention Space Partitioning and Cost Error Controlling for Dynamic Multidatabase Systems", Distributed and Parallel Databases, Vol. 23, No. 2, pp 151-188, 2008.

• F. Yan, W.-C. Hou and Qiang Zhu, "Selectivity Estimation of Range Queries Based on Data Density Approximation via Cosine Series", Data & Knowledge Engineering, Vol. 63, No. 3, pp 853 - 876, 2007.

• Z. Jiang, C. Luo, W.-C. Hou, F. Yan, Qiang Zhu and C.-F. Wang, "Join Size Estimation Over Data Streams Using Cosine Series", International Journal of Information Tech., Vol. 12, No. 9, pp 27-45, 2007.

• Gang Qian, Qiang Zhu, Qiang Xue and Sakti Pramanik, "Dynamic Indexing for Multidimensional Non-ordered Discrete Data Spaces Using a Data-Partitioning Approach", ACM Transactions on Database Systems (TODS), Vol. 31, No. 2, pp 439-484, 2006.

• Gang Qian, Qiang Zhu, Qiang Xue and Sakti Pramanik, "A Space-Partitioning-Based Indexing Method for Multidimensional Non-ordered Discrete Data Spaces", ACM Transactions on Information Systems (TOIS), Vol. 23, No. 1, pp 79-110, 2006.

• Qiang Zhu, Yingying Tao and Calisto Zuzarte, "Optimizing Complex Queries Based on Similarities of Subqueries", Knowledge and Information Systems: an International Journal , Vol. 8, No. 3, pp 350-373, 2005.

• Qiang Xue, Sakti Pramanik, Gang Qian and Qiang Zhu, "A Hybrid Index Structure for Querying Large String Databases", The International Journal of Electronic Business, Vol. 3, Nos. 3/4, pp 243-254, 2005.

• Amira Rahal, Qiang Zhu and P. A. Larson, "Evolutionary Techniques for Updating Query Cost Models in a Dynamic Multidatabase Environment", The VLDB Journal, Vol. 13, No. 2, pp 162-176, 2004.

• Qiang Zhu, B. Dunkel, W. Lau, S. Chen and B. Schiefer, "Piggyback Statistics Collection for Query Optimization: Towards a Self-Maintaining Database Management System", The Computer Journal, Vol. 47, No. 2, pp 218-241, Oxford, 2004.

• Qiang Zhu, S. Motheramgari and Y. Sun, "Cost Estimation for Queries Experiencing Multiple Contention States in Dynamic Multidatabase Environments", Knowledge and Information Systems: an International Journal , Springer Verlag, Vol. 5, No. 1, pp 26-49, 2003.

• B. Dunkel and Qiang Zhu, "A Column-Partitioning Approach to the Vertical Mining of Association Rules", International Journal of Fuzzy Systems , Vol. 4, No. 3, pp 784-794, 2002.

• Qiang Zhu and P.-A. Larson, "Classifying Local Queries for Global Query Optimization in Multidatabase Systems", International Journal of Cooperative Information Systems, Vol. 9, No. 3, pp 315-355, 2000.

• Qiang Zhu and P.-A. Larson, "Solving Local Cost Estimation Problem for Global Query Optimization in Multidatabase Systems", Distributed and Parallel Databases, Vol. 6, No. 4, pp 373-420, 1998.

• D. Yoon, Qiang Zhu and V. Mohanram, "OBJ-NET: An Object-Oriented System Design Tool", Journal of Systems Integration, Vol. 8, pp 229-254, 1998.

• Y. Chen, Qiang Zhu and N. Wang, "Query Processing with Quality Control in the World Wide Web", World Wide Web, Vol. 1, No. 4, pp 241-255, 1998.

• Qiang Zhu and P.-A. Larson, "A Fuzzy Query Optimization Approach for Multidatabase Systems", Int'l Journal of Uncertainty, Fuzziness and Knowledge-Based Systems, Vol. 5, No. 6, pp 701-722, 1997.

• G. K. Attaluri, D. P. Bradshaw, N. Coburn, P.-A. Larson, P. Martin,A. Silberschatz, J. Slonim, and Qiang Zhu, "CORDS Multidatabase Project", IBM Systems Journal, Vol. 34, No. 1, pp 39-62, 1995.

• Qiang Zhu, A. Peirce and J. Chadam, "Initiation of Shape Instabilities of Free Boundaries in Planar Cauchy-Stefan Problems", European Journal of Applied Math, Vol. 4, No. 4, pp 419-436, 1993.

• N. Wang and Qiang Zhu, "Functionality and Implementation Techniques of the Relational DBMS: NITDB", Software Industry, Vol. 5, No. 9, pp 28-37, 1988.

• N. Wang, P. Zhou, Qiang Zhu, et al., "NITDB: A Multi-User Relational DBMS for Microcomputers", Chinese Journal of Computers, Vol. 10, No. 8, pp 477-484, 1987.

• N. Wang, Qiang Zhu and M. Sun, "A New Method for Implementing Data Updates in a Relational DBMS", Journal of Nanjing Institute of Tech, Vol. 17, No. 6, pp 27-36, 1987.

• N. Wang and Qiang Zhu, "Design and Implementation of Library of Functions for Performing Relational Operations in NITDB", Computer Research and Development, Vol. 24, No. 4, pp 14-21, 1987.

• N. Wang and Qiang Zhu, "Query Processing in a Relational Micro-DBMS with Multiple Optimization Strategies", Computer Research and Development, Vol. 23, No. 9, pp 24-30, 1986.

• N. Wang, Qiang Zhu and Y. Lou, "View Processing in the Relational Database Management System: NITDB", Microcomputers, No. 1, pp 26-31, 1986.

• N. Wang and Qiang Zhu, "Some Theorems on Equivalence of MicroSQL Queries and Optimization via Query Transformations", Journal of Nanjing Institute of Tech, Vol. 16, No. 5, pp 44-53, 1986.

• Qiang Zhu, J. Zhu, Z. Sun and J. Gao, "Evaluating and Predicting the Quality of Teaching and Learning in the Graduation Projects for Undergraduate Students", Journal of Advanced Education in Engineering, Vol. 2, No. 2, pp 35-51, 1985

• Qiang Zhu, "Query Optimization in Relational Database Systems", Computer Applications and Software, Vol. 1, No. 5, pp 9-21, 1984.

Book Chapters:

• Qiang Xue, Sakti Pramanik, Gang Qian and Qiang Zhu, "The Hybrid Digital Tree: a New Indexing Technique for Large String Databases", Enterprise Information Systems VII (Selected Best Papers of ICEIS'05), pp 45-51, Kluwer Publishers, 2006.

• Wen-Chi Hou, Hong Guo, Feng Yan and Qiang Zhu, "Drawing Representative Sampling from Large Databases", Encyclopedia of Data Warehousing and Mining, editted by J. Wang, Vol. 1, pp 413-420, 2005.

• Qiang Zhu, J. Haridas and W.-C. Hou, "Global Query Optimization Based on Multistate Cost Models for a Dynamic Multidatabase System", Enterprise Information Systems V (Selected Best Papers of ICEIS'03), editted by O. Camp, et al., pp 117-128, Kluwer Publishers, Aug. 2004.

Refereed Conference Proceedings:

• Manish Singh, Qiang Zhu and H.V. Jagadish, "SWST: A Disk Based Index for Sliding Window Spatio-Temporal Data", Proc. of the 28th IEEE International Conference on Data Engineering (ICDE'12) , Washington, DC, April 1 - 4, 2012 (to appear).

• Chao Zhu, Qiang Zhu, Calisto Zuzarte and Wenbin Ma, "A Materialized-View Based Technique to Optimize Progressive Queries via Dependency Analysis", Proc. of 2011 Conference of the Centre for Advanced Studies on Collaborative Research (CASCON'11) , Toronto, Nov. 7 - 10, 2011 (to appear).

• F. Yu, W.-C. Hou, C. Luo, Qiang Zhu and D. Che, "Join Selectivity Re-estimation for Repetitive Queries in Databases", Proc. of the 22nd International Cnference on Database and Expert Systems Applications (DEXA'11) , pp. 420-427, Toulouse, France, Aug. 29 - Sept. 2, 2011.

• Chao Zhu, Qiang Zhu and Calisto Zuzarte, "Efficient Processing of Monotonic Linear Progressive Queries via Dynamic Materialized Views", Proc. of 2010 Conference of the Centre for Advanced Studies on Collaborative Research (CASCON'10) , pp. 224 - 237, Toronto, Nov. 1 - 4, 2010.

• Hyun-Jeong Seok, Qiang Zhu, Gang Qian, Sakti Pramanik, and Wen-Chi Hou, "Deletion Techniques for the ND-tree in Non-ordered Discrete Data Spaces", Proc. of 18th International Conference on Software Engineering and Data Engineering (SEDE'09), pp 1-6, Las Vegas, Nevada, June 22-24, 2009.

• Changqing Chen, Sakti Pramanik, Qiang Zhu, and Gang Qian, "A Study of Indexing Strategies for Hybrid Data Spaces", Proc. of the 11th International Conference on Enterprise Information Systems (ICEIS'09), pp 149-159, Milan, Italy, May 6-10, 2009.

• Changqing Chen, Sakti Pramanik, Qiang Zhu, Alok Watve, and Gang Qian, "The C-ND Tree: A Multidimensional Index for Hybrid Continuous and Non-ordered Discrete Data Spaces", Proc. of the 12th International Conference on Extending Database Technology (EDBT'09), pp 462-471, St. Petersburg, Russia, March 2009.

• Cheng Luo, Zhewei Jiang, Wen-Chi Hou, Feng Yu, and Qiang Zhu, "A Sampling Approach for XML Query Selectivity Estimation", Proc. of the 12th International Conference on Extending Database Technology (EDBT'09), pp 335-344, St. Petersburg, Russia, March 2009.

• Gang Qian, Hyun-Jeong Seok, Qiang Zhu, and Sakti Pramanik, "Space-Partitioning-Based Bulk-Loading for the NSP-Tree in Non-ordered Discrete Data Spaces", Proc. of the 19th International Cnference on Database and Expert Systems Applications (DEXA'08), pp. 404-418, Turin, Italy, Sept. 2008.

• Wen-Chi Hou, Cheng Luo, Zhewei Jiang, Feng Yan, and Qiang Zhu, "Approximate Range-Sum Queries over Data Cubes Using Cosine Transform", Proc. of the 19th International Cnference on Database and Expert Systems Applications (DEXA'08), pp. 376-389, Turin, Italy, Sept. 2008.

• Hyun-Jeong Seok, Gang Qian, Qiang Zhu, Alexander Oswald and Sakti Pramanik, "Bulk-Loading the ND-Tree in Non-ordered Discrete Data Spaces", Proc. of 13th International Conference on Database Systems for Advanced Applications (DASFAA'08), pp 156-171, New Delhi, India, March 19 - 22, 2008 (Best Paper Award).

• K. Towne, Qiang Zhu, C. Zuzarte and W.-C. Hou, "Window Query Processing for Joining Data Streams with Relations", Proc. of 2007 Conference of the Centre for Advanced Studies on Collaborative Research (CASCON'07) , pp 188 - 202, Toronto, Oct. 2007 (Best Paper Award).

• Z. Jiang, C. Luo, W.-C. Hou, Qiang Zhu and D. Che, "Efficient Processing of XML Twig Pattern : A Novel One-Phase Holistic Solution", Proc. of the 18th International Cnference on Database and Expert Systems Applications (DEXA'07), pp 87-97, Regensburg, Germany, Sept. 2007.

• Dashiell Kolbe, Qiang Zhu and Sakti Pramanik, "On k-Nearest Neighbor Searching in Non-Ordered Discrete Data Spaces", Proc. of the 23rd IEEE International Conference on Data Engineering (ICDE'2007), pp 426-435, Turkey, April 2007.

• Adegoke Ojewole, Qiang Zhu and Wen-Chi Hou, "Window Join Approximation over Data Streams with Importance Semantics", Proceedings of the 15th ACM International Conference on Information and Knowledge Management (CIKM'06), pp 112-121, Arlington, VA, Nov. 6-11, 2006.

• Cheng Luo, Zhewei Jiang, Wen-Chi Hou, Qiang Zhu and Chih-Fang Wang, "Applying the Cosine Series to XML Structural Join Size Estimation", Proceedings of the 17th International Conference on Database and Expert Systems Applications (DEXA'06), pp 761-770, Krakow, Poland, Sept. 4-8, 2006.

• Zhewei Jiang, Cheng Luo, Wen-Chi Hou, Feng Yan and Qiang Zhu, "Estimating Aggregate Join Queries Over Data Streams Using Discrete Cosine Transform", Proceedings of the 17th International Conference on Database and Expert Systems Applications (DEXA'06), pp 182-192, Krakow, Poland, Sept. 4-8, 2006.

• Hong Guo, Wen-Chi Hou, Feng Yan and Qiang Zhu, "A Metropolis Sampling Method for Drawing Representative Samples", Proc. of 10th International Conference on Database Systems for Advanced Applications (DASFAA'05), pp 226-238, Beijing, China, April 18 - 20, 2005.

• Qiang Xue, Sakti Pramanik, Gang Qian and Qiang Zhu, "The Hybrid Digital Tree: a New Indexing Technique for Large String Databases", Proc. of 7th International Conference on Enterprise Information Systems (ICEIS'05), Vol. 1, pp 115-121, Florida, May 24-28, 2005.

• Hong Guo, Wen-Chi Hou, Feng Yan and Qiang Zhu, "A Monte Carlo Sampling Method for Drawing Representative Sampling from Large Databases", Proc. of 16th International Conference on Scientific and Statistical Database Management (SSDBM'04), pp 419-420, , Santorini Island, Greece, June 21 - 23, 2004.

• Gang Qian, Qiang Zhu, Qiang Xue and Sakti Pramanik, "The ND-Tree: A Dynamic Indexing Technique for Multidimensional Non-ordered Discrete Data Spaces", Proc. of 29th International Conference on Very Large Data Bases (VLDB'03) , pp 620-631, Berlin, Germany, Sept. 9 - 12, 2003.

• Yingying Tao, Qiang Zhu and Calisto Zuzarte, "Exploiting Similarity of Subqueries for Complex Query Optimization", Lecture Notes in Computer Science (Proc. of DEXA'2003), Vol. 2736, pp 747-759, Springer Verlag, Sept. 1-5, 2003.

• Yingying Tao, Qiang Zhu, Calisto Zuzarte and Wing Lau, "Optimizing Large Star-Schema Queries with Snowflakes via Heuristic-Based Query Rewriting", Proc. of 2003 Conference of the Centre for Advanced Studies on Collaborative Research (CASCON'03), pp 261-275, ACM Digtal Library, 2003.

• Qiang Zhu, J. Haridas and W.-C. Hou, "Global Query Optimization Based on Multistate Cost Models for a Dynamic Multidatabase System", Proc. of 5th International Conference on Enterprise Information Systems (ICEIS'03), Vol. 1, pp 144-155, Angers, France, April 2003.

• F. Yan, W.-C. Hou and Qiang Zhu, "Selectivity Estimation Using Orthogonal Series", Proc. of 8th International Conference on Database Systems for Advanced Applications (DASFAA'03), pp 157-164, Kyoto, Japan, March 2003.

• A. Rahal, Qiang Zhu and P.-A. Larson, "Developing Evolutionary Cost Models for Query Optimization in a Dynamic Multidatabase Environment", Proc. of 10th International Conference on Cooperative Information Systems (CoopIS'02), pp 1-18, Irvine, California, Oct. 2002.

• Y. Tao, Qiang Zhu and C. Zuzarte, "Exploiting Common Subqueries for Complex Query Optimization", Proc. of 2002 Conference of the Centre for Advanced Studies on Collaborative Research (CASCON'02), pp 21-34, ACM Digital Library, 2002.

• Qiang Zhu, Y. Sun and S. Motheramgari, "Developing Cost Models with Qualitative Variables for Dynamic Multidatabase Environments", Proc. of the 16th IEEE International Conference on Data Engineering (ICDE'2000), pp 413-424, Feb. 2000.

• Qiang Zhu, S. Motheramgari and Y. Sun, "Cost Estimation for Large Queries via Fractional Analysis and Probabilistic Approach in Dynamic Multidatabase Environments", Lecture Notes in Computer Science (Proc. of DEXA'2000), Vol. 1873, pp 509-525, Springer Verlag, Sept. 2000.

• I. Ray, B. Maxim, K. Akingbehin, I. Ray and Qiang Zhu, "Design of a Center for Research in Information System Security", Proc. of the 18th Annual AoM/IAoM Conference, pp 131-136, August 2000.

• B. Dunkel, Qiang Zhu, W. Lau and S. Chen, "Multiple-Granularity Interleaving for Piggyback Query Processing", Proc. of 1999 Conference of the Centre for Advanced Studies on Collaborative Research (CASCON'99), pp 24-39, ACM Digital Library, 1999.

• Qiang Zhu, B. Dunkel, N. Soparkar, et al., "A Piggyback Method to Collect Statistics for Query Optimization in Database Management Systems", Proc. of 1998 Conference of the Centre for Advanced Studies on Collaborative Research (CASCON'98), pp 67-82, ACM Digital Library, 1998.

• Qiang Zhu, "Preprocessing Embedded Database Queries in a Process-Oriented Programming Language for Distributed Systems", Proc. of Int'l Conf. on Paral. and Distr. Comp. Systems, pp 94-101, 1997.

• Qiang Zhu, D. Yoon and J. Cheng, "Information Management for an Object-Oriented System Design Tool", Proc. of Int'l Conf. on Modeling and Simulation, pp 34-39, 1997.

• Qiang Zhu and P.-A. Larson, "Building Regression Cost Models for Multidatabase Systems", Proc. of 4th IEEE Int'l Conf. on Paral. and Distr. Inf. Systems (PDIS'96), pp 220-231, 1996.

• Qiang Zhu and P.-A. Larson, "Global Query Processing and Optimization in the CORDS Multidatabase System", Proc. of 9th Int'l Conf. on Paral. and Distr. Comp. Sys. , pp 640-646, 1996.

• D. Yoon, Qiang Zhu and J. Cheng, "OBJ-NET: An Object-Oriented System Design Tool", Proc. of the Int'l Conf. on Modeling and Simulation, pp 151-159, Pittsburgh, PA, April 1996.

• Qiang Zhu and P.-A. Larson, "A Query Sampling Method for Estimating Local Cost Parameters in a Multidatabase System", Proc. of 10th IEEE Int'l Conf. on Data Eng. (ICDE'94), pp 144-153, 1994.

• Qiang Zhu and P.-A. Larson, "Establishing a Fuzzy Cost Model for Query Optimization in a Multidatabase System", Proc. of 27th ACM/IEEE Hawaii Int'l Conf. on Sys. Sci., pp 263-272, 1994.

• Qiang Zhu, "An Integrated Method for Estimating Selectivities in a Multidatabase System", Proc. of 1993 Conference of the Centre for Advanced Studies on Collaborative Research (CASCON'93), Vol.II, pp 832-847, ACM Digital Library, 1993.

• Qiang Zhu and P.-A. Larson, "Query Optimization using Fuzzy Set Theory for Multidatabase Systems", Proc. of 1993 Conference of the Centre for Advanced Studies on Collaborative Research (CASCON'93), Vol.II, pp 848-859, ACM Digital Library, Toronto, Oct. 24-28, 1993.

• Qiang Zhu, "Query Optimization in Multidatabase Systems", Proc. of 1992 Conference of the Centre for Advanced Studies on Collaborative Research (CASCON'92), Vol.II, pp 111-127, ACM Digital Library, 1992.

• P.-A. Larson, Qiang Zhu and F. Pellow, "Supporting Database Access in the Hermes Programming Language", Proc. of 1991 Conference of the Centre for Advanced Studies on Collaborative Research (CASCON'91), pp 205-222, ACM Digital Library, 1991.

Other Publications:

• Qiang Zhu, B. Medjahed, A. Sharma, et al., "Developing In-Vehicle Database Management Techniques for Efficient Vehicular Applications", Proceedings of UMD Technology Day 2006, Dearborn, MI, June 2006.

• Qiang Zhu, Y. Tao, et al., "Optimization of Complex Queries in a Database Management System", Proceedings of UMD Technology Day 2005, pp 147-150, Dearborn, MI, June 2005.

• Qiang Zhu, "Establishing Dynamic Cost Models for Multidatabase Systems", Proc. of the 2002 NSF Information and Data Management Workshop, pp 322-324, Crystal City, VA, May, 2002.

• Qiang Zhu, B. Dunkel, et al., "Piggyback Statistics Collection for Query Optimization: Towards an Auto-Maintaining Database Management System", Proceedings of UMD Technology Day 2002, pp 17-20, Dearborn, MI, June 2002.

• Qiang Zhu, "Establishing Dynamic Cost Models for Multidatabase Systems", Proc. of the 2001 NSF Information and Data Management Workshop, pp 406-408, Fort Worth, Texas, April 29 - May 1, 2001.

• Qiang Zhu, B. Dunkel, et al., "A Piggyback Method for Database Statistics Collection: Towards a Maintenance-Free Database Management System", Proceedings of UMD Technology Day 2001, pp 11-14, Dearborn, MI, June 2001.

• Qiang Zhu, "Establishing Dynamic Cost Models for Multidatabase Systems", Proc. of the 2000 NSF Information and Data Management Workshop: Research Agenda into the Future, Chicago, IL, pp 245-247, March 2000.

• Qiang Zhu, B. Dunkel, et al., "Automating Statistics Collection for Query Optimization in Database Management Systems", Proceedings of UMD Technology Day 2000, pp 8-11, Dearborn, MI, June 2000.

• D. Yoon, Qiang Zhu, et al., "An Integrated Approach to CNC Tool Path Generation", Proceedings of UMD Technology Day 2000, pp 6-7, Dearborn, MI, June 2000.

• Qiang Zhu, B. Dunkel, et al., "Piggyback Query Optimization with Statistics Collection for Database Management Systems", Proceedings of UMD Technology Day 1999, pp 9-11, Dearborn, MI, June 1999.

• D. Yoon, Qiang Zhu, et al., "OBJ-NET: An Object-Oriented System Design Tool", Proceedings of UMD Technology Day 1996, pp 9-12, Dearborn, MI, June 1996.