HKBU Database Group - Publications

L. Xu, J. Jiang, B. Choi, J. Xu, and B. He. "Bursting Flow Query on Large Temporal Flow Networks." Proc. of the ACM SIGMOD International Conference on Management of Data (SIGMOD '25), Berlin, Germany, 2025.
Z. Wu, X. Zhu, Y. Fang, J. Xu, and X. Huang. "Interactive Graph Search for Multiple Targets on DAGs." Proc. of the 51st International Conference on Very Large Data Bases (PVLDB '25), London, United Kingdom, 2025.
S. Zhang, H. Hu, Q. Ye, and J. Xu. "PrivDPR: Synthetic Graph Publishing with Deep PageRank under Differential Privacy." Proc. of the 31st ACM SIGKDD Conference on Knowledge Discovery and Data Mining (SIGKDD '25), Toronto, Canada, 2025.
X. Lin, R. Yang, H. Zheng, and X. Ke. "Spectral Subspace Clustering for Attributed Graphs." Proc. of the 31st ACM SIGKDD Conference on Knowledge Discovery and Data Mining (SIGKDD '25), Toronto, Canada, 2025.
X. Liao, Q. Liu, J. Jiang, B. Choi, B. He, and J. Xu. "Accelerating D-core Maintenance over Dynamic Directed Graphs." Proc. of the 41st IEEE International Conference on Data Engineering (ICDE '25), Hong Kong, May 2025.
J. Zhang, C. Zhang, J. Pei, X. Luo, J. Xu, and J. Liu. "Computing Shapley Values in Preference Queries." Proc. of the 41st IEEE International Conference on Data Engineering (ICDE '25), Hong Kong, May 2025.
N. Cui, D. Wang, J. Li, H. Zhu, X. Yang, and J. Xu. "Towards Dynamic Boolean Range Query over Hybrid-Storage Blockchains: A Secure and Reliably Verifiable Framework." Proc. of the 41st IEEE International Conference on Data Engineering (ICDE '25), Hong Kong, May 2025.
H. Li, Y. Li, W. Chen, S. He, M. Xu, and J. Xu. "Effective Task Assignment in Mobility Prediction-Aware Spatial Crowdsourcing." Proc. of the 41st IEEE International Conference on Data Engineering (ICDE '25), Hong Kong, May 2025.
T. N. Chan, P. L. Ip, B. Zhu, L. H. U, D. Wu, J. Xu, and C. S. Jensen. "Large-scale Spatiotemporal Kernel Density Visualization." Proc. of the 41st IEEE International Conference on Data Engineering (ICDE '25), Hong Kong, May 2025.
R. Tang, X. Zhu, X. Li, L. Chen, X. Huang, M. Yuan, and J. Xu. "Maximum Fanout-Free Window Enumeration: Towards Multi-Output Sub-structure Synthesis." Proc. of the 28th Design, Automation and Test in Europe Conference (DATE '25), Lyon, France, 2025.
H. Zheng, J. Shi, and R. Yang. "GraSP: Simple yet Effective Graph Similarity Predictions." Proc. of the 39th AAAI Conference on Artificial Intelligence (AAAI '25), Philadelphia, Pennsylvania, USA, Mar 2025.
H. Li, L. Bai, Q. Ye, H. Hu, Y. Xiao, H. Zheng, and J. Xu. "A Sample-Level Evaluation and Generative Framework for Model Inversion Attacks." Proc. of the 39th AAAI Conference on Artificial Intelligence (AAAI '25), Philadelphia, Pennsylvania, USA, Mar 2025.

C. Zhang, C. Xu, H. Hu, and J. Xu. "COLE: A Column-based Learned Storage for Blockchain Systems." Proc. of the 22nd USENIX Conference on File and Storage Technologies (FAST '24), Santa Clara, CA, USA, 2024.
X. Zhang, Q. Wang, C. Xu, Y. Peng, and J. Xu. "FedKNN: Secure Federated k-Nearest Neighbor Search." Proc. of the ACM SIGMOD International Conference on Management of Data (SIGMOD '24), Santiago, Chile, 2024.
X. Luo, J. Pei, C. Xu, W. Zhang, and J. Xu. "Fast Shapley Value Computation in Data Assemblage Tasks as Cooperative Simple Games." Proc. of the ACM SIGMOD International Conference on Management of Data (SIGMOD '24), Santiago, Chile, 2024.
C. Luo, Y. Zhu, Q. Liu, Y. Gao, L. Chen, and J. Xu. "MCR-Tree: An Efficient Index for Multi-dimensional Core Search." Proc. of the ACM SIGMOD International Conference on Management of Data (SIGMOD '24), Santiago, Chile, 2024.
J. Ma, S. S. Bhowmick, L. Tay, and B. Choi. "SIERRA: A Counterfactual Thinking-based Visual Interface for Property Graph Query Construction." Proc. of the ACM SIGMOD International Conference on Management of Data (SIGMOD '24), Santiago, Chile, 2024.
R. Yang, and J. Shi. "Efficient High-Quality Clustering for Large Bipartite Graphs." Proc. of the ACM SIGMOD International Conference on Management of Data (SIGMOD '24), Santiago, Chile, 2024.
Q. Wang, Q. Luo, and Y. Wang. "Relational Algorithms for Top-k Query Evaluation." Proc. of the ACM SIGMOD International Conference on Management of Data (SIGMOD '24), Santiago, Chile, 2024.
R. Zuo, G. Li, R. Cao, B. Choi, J. Xu, and S. S. Bhowmick. "DARKER: Efficient Transformer with Data-driven Attention Mechanism for Time Series." Proc. the 50th International Conference on Very Large Data Bases (PVLDB '24), Guangzhou, China, 2024.
X. Liao, Q. Liu, X. Huang, and J. Xu. "Truss-based Community Search over Streaming Directed Graphs." Proc. the 50th International Conference on Very Large Data Bases (PVLDB '24), Guangzhou, China, 2024.
T. N. Chan, R. Zang, B. Zhu, L. H. U, D. Wu, and J. Xu. "LION: Fast and High-Resolution Network Kernel Density Visualization." Proc. the 50th International Conference on Very Large Data Bases (PVLDB '24), Guangzhou, China, 2024.
Y. Zhou, Y. Fang, C. Ma, T. Hou, and X. Huang. "Efficient Maximal Motif-Clique Enumeration over Large Heterogeneous Information Networks." Proc. the 50th International Conference on Very Large Data Bases (PVLDB '24), Guangzhou, China, 2024.
Y. Lai, X. Lin, R. Yang, and H. Wang. "Efficient Topology-aware Data Augmentation for High-Degree Graph Neural Networks." Proc. the 30th International Conference on Knowledge Discovery and Data Mining(SIGKDD '24), Barcelona, Spain, 2024.
H. Wang, R. Yang, and X. Xiao. "Effective Edge-wise Representation Learning in Edge-Attributed Bipartite Graphs." Proc. the 30th International Conference on Knowledge Discovery and Data Mining(SIGKDD '24), Barcelona, Spain, 2024.
R. Yang, Y. Wu, X. Lin, Q. Wang, T. N. Chan, and J. Shi. "Effective Clustering on Large Attributed Bipartite Graphs." Proc. the 30th International Conference on Knowledge Discovery and Data Mining(SIGKDD '24), Barcelona, Spain, 2024.
H. Wang, C. Xu, X. Chen, C. Zhang, H. Hu, S. Tian, Y. Yan, and J. Xu. "V2FS: A Verifiable Virtual Filesystem for Multi-Chain Query Authentication." Proc. the 40th IEEE International Conference on Data Engineering (ICDE '24), Utrecht, Netherlands, May 2024.
X. Ran, Q. Ye, H. Hu, X. Huang, J. Xu, and J. Fu. "Differentially Private Graph Neural Networks for Link Prediction." Proc. the 40th IEEE International Conference on Data Engineering (ICDE '24), Utrecht, Netherlands, May 2024.
Z. Sun, X. Huang, C. Piao, C. Long, and J. Xu. "Adaptive Truss Maximization on Large Graphs: A Minimum Cut Approach." Proc. the 40th IEEE International Conference on Data Engineering (ICDE '24), Utrecht, Netherlands, May 2024.
L. Sun, X. Huang, Z. Wu, and J. Xu. "Efficient Cross-layer Community Search in Large Multilayer Graphs." Proc. the 40th IEEE International Conference on Data Engineering (ICDE '24), Utrecht, Netherlands, May 2024.
Y. Peng, S. Lin, Q. Chen, L. Xu, X. Ren, Y. Li, and J. Xu. "ChatGraph: Chat with Your Graphs." Proc. the 40th IEEE International Conference on Data Engineering (ICDE '24), Utrecht, Netherlands, May 2024. (Demo Paper)
D. Liu, R. Wang, Z. Zou, and X. Huang. "Fast Multilayer Core Decomposition and Indexing." Proc. the 40th IEEE International Conference on Data Engineering (ICDE '24), Utrecht, Netherlands, May 2024.
N. Yang, Y. Wang, Z. Yu, D. He, X. Huang, and D. Jin. "Joint Domain Adaptive Graph Convolutional Network." Proc. the 33rd International Joint Conference on Artificial Intelligence(IJCAI '24), Jeju, South Korea, Aug 2024.
Y. Li, G. Guo, J. Shi, R. Yang, S. Shen, Q. Li, and J. Luo. "A Versatile Framework for Attributed Network Clustering via K-Nearest Neighbor Augmentation." The VLDB Journal (VLDBJ '24), 2024.
J. Guan, B. Chen, and X. Huang. "Community Detection via Multihop Nonnegative Matrix Factorization." IEEE Transactions on Neural Networks and Learning Systems(TNNLS), accepted to appear, 2024.
Y. Li, H. Li, B. Mei, X. Huang, J. Xu, and M. Xu. "Fairness-Guaranteed Task Assignment for Crowdsourced Mobility Services." IEEE Transactions on Mobile Computing (TMC), accepted to appear, 2024.

Y. Peng, B. Choi, T. Chan, J. Yang, and J. Xu. "Efficient Approximate Nearest Neighbor Search in Multi-dimensional Databases." Proc. the ACM SIGMOD International Conference on Management of Data (SIGMOD '23), Seattle, Washington, USA, June 2023.
L. Xu, B. Choi, Y. Peng, J. Xu, and S. S. Bhowmick. "A Framework for Privacy Preserving Localized Graph Pattern Query Processing." Proc. the ACM SIGMOD International Conference on Management of Data (SIGMOD '23), Seattle, Washington, USA, June 2023.
Z. Sun, X. Huang, Q. Liu, and J. Xu. "Efficient Star-based Truss Maintenance on Dynamic Graphs." Proc. of the ACM SIGMOD Int'l Conf. on Management of Data (SIGMOD '23), Seattle, WA, USA, 2023.
Y. Li, R. Yang, and J. Shi. "Efficient and Effective Attributed Hypergraph Clustering via K-Nearest Neighbor Augmentation." Proc. the ACM SIGMOD International Conference on Management of Data (SIGMOD '23), Seattle, Washington, USA, June 2023.
X. Hu* and Q. Wang*. "Computing the Difference of Conjunctive Queries Efficiently." Proc. the ACM SIGMOD International Conference on Management of Data (SIGMOD '23), Seattle, Washington, USA, June 2023. (* The authors are ordered alphabetically, as a convention of theory papers.)
S. Zhang, R. Yang, X. Xiao, X. Yan, and B. Tang. "Effective and Efficient PageRank-based Positioning for Graph Visualization." Proc. the ACM SIGMOD International Conference on Management of Data (SIGMOD '23), Seattle, Washington, USA, June 2023.
R. Yang and J. Tang. "Efficient Estimation of Pairwise Effective Resistance." Proc. the ACM SIGMOD International Conference on Management of Data (SIGMOD '23), Seattle, Washington, USA, June 2023.
J. Ma, S. S. Bhowmick, B. Choi, and L. Tay. "Theories and Principles Matter: Towards Visually Appealing and Effective Abstraction of Property Graph Queries." Proc. the ACM SIGMOD International Conference on Management of Data (SIGMOD '23), Seattle, Washington, USA, June 2023.
Q. Wang, X. Hu, B. Dai, and K. Yi. "Change Propagation Without Joins." Proc. the 49th International Conference on Very Large Data Bases (PVLDB '23), Vancouver, BC, Canada, 2023.
S. Zhang, R. Yang, J. Tang, X. Xiao and B. Tang. "Efficient Approximation Algorithms for Spanning Centrality." ACM SIGKDD Conference on Knowledge Discovery and Data Mining (KDD '23), August 2023.
H. Wang, R. Yang, K. Huang and X. Xiao. "Efficient and Effective Edge-wise Graph Representation Learning." ACM SIGKDD Conference on Knowledge Discovery and Data Mining (KDD '23), August 2023.
Z. Zhou, J. Shi, R. Yang, Y. Zou and Q. Li. "SlotGAT: Slot-based Message Passing for Heterogeneous Graphs." International Conference on Machine Learning (ICML '23), June 2023.
R. Yang, J. Shi, X. Xiao, Y. Yang, S. Bhowmick, and J. Liu. "PANE: Scalable and Effective Attributed Network Embedding." The VLDB Journal (VLDBJ '23), 2023.
K. Huang, J. Tang, J. Liu, R. Yang, and X. Xiao. "Node-wise Diffusion for Scalable Graph Learning." Proc. The Web Conference (WWW '23), 2023.
R. Zuo, G. Li, B. Choi, S. S. Bhowmick, D. N-Y. Mah, and G. L-H. Wong. "SVP-T: A Shape-level Variable-Position Transformer for Multivariate Time Series Classification." Proc. the 37th AAAI Conference on Artificial Intelligence (AAAI '23), Washington, DC, USA, Feb 2023.
X. Zhu, R. Tang, L. Chen, X. Li, X. Huang, M. Yuan, W. Sheng, and J. Xu. "A Database Dependent Framework for K-Input Maximum Fanout-Free Window Rewriting." Proc. the 60th ACM/IEEE International Conference on Design Automation Conference (DAC’23), San Francisco, California, USA, 2023.
Q. Liu, X. Liao, X. Huang, J. Xu, and Y. Gao. "Distributed (α, β)-Core Decomposition over Bipartite Graphs." Proc. the 39th IEEE International Conference on Data Engineering (ICDE’23), Anaheim, California, USA, 2023.
H. Zhu, W. Liu, J. Yin, N. Cui, J. Xu, X. Huang, and W.-C. Lee. "Keyword-based Socially Tenuous Group Queries." Proc. the 39th IEEE International Conference on Daticdea Engineering (ICDE’23), Anaheim, California, USA, 2023.
J. Jiang, B. Choi, X. Huang, J. Xu and S. S. Bhowmick. "DKWS: A Distributed System for Keyword Search on Massive Graphs." IEEE Transactions on Knowledge and Data Engineering (TKDE), accepted to appear, 2023.
Y. Li, H. Huang, X. Huang, J. Xu, Y. Han, and M. Xu. "Utility-Aware Dynamic Ridesharing in Spatial Crowdsourcing." IEEE Transactions on Mobile Computing (TMC), accepted to appear, 2023.

T. Chan, L. U, B. Choi, and J. Xu. "SLAM: Efficient Sweep Line Algorithms for Kernel Density Visualization." Proc. the ACM SIGMOD International Conference on Management of Data (SIGMOD '22), Philadelphia, USA, June 2022.
J. Yang, Y. Peng, and W. Zhang. "(p,q)-biclique counting and enumeration for large sparse bipartite graphs." Proc. the 48th International Conference on Very Large Data Bases (PVLDB '22), Sydney, Australia, 2022.
T. Chan, P. Ip, L. U, B. Choi, and J. Xu. "SWS: A Complexity-Optimized Solution for Spatial-Temporal Kernel Density Visualization." Proc. the 48th International Conference on Very Large Data Bases (PVLDB '22), Sydney, Australia, 2022.
T. Chan, P. Ip, L. U, B. Choi, and J. Xu. "SAFE: A Share-and-Aggregate Bandwidth Exploration Framework for Kernel Density Visualization." Proc. the 48th International Conference on Very Large Data Bases (PVLDB '22), Sydney, Australia, 2022.
X. Liao*, Q. Liu*, J. Jiang, X. Huang, J. Xu, and B. Choi. "Distributed D-core Decomposition over Large Directed Graphs." Proc. the 48th International Conference on Very Large Data Bases (PVLDB '22), Sydney, Australia, 2022. (*equal contribution)
X. Sun, X. Huang, and D. Jin. "Fast algorithms for core maximization on large graphs." Proc. the 48th International Conference on Very Large Data Bases (PVLDB '22), Sydney, Australia, 2022.
Y. Jiang, Y. Rong, H. Cheng, X. Huang, K. Zhao, and J. Huang. "Query driven-graph neural networks for community search: from non-attributed, attributed, to interactive attributed." Proc. the 48th International Conference on Very Large Data Bases (PVLDB '22), Sydney, Australia, 2022.
H. Wang, C. Xu, C. Zhang, J. Xu, Z. Peng, and J. Pei. "vChain+: Optimizing Verifiable Blockchain Boolean Range Queries." Proc. the 38th IEEE International Conference on Data Engineering (ICDE '22), Kuala Lumpur, Malaysia, May 2022.
Y. Peng, B. Choi, T. Chan, and J. Xu. "LAN: Learning-based Approximate k-Nearest Neighbor Search in Graph Databases." Proc. the 38th IEEE International Conference on Data Engineering (ICDE '22), Kuala Lumpur, Malaysia, May 2022.
Z. Li, M. Yiu, and T. Chan. "PAW: Data Partitioning Meets Workload Variance." Proc. the 38th IEEE International Conference on Data Engineering (ICDE '22), Kuala Lumpur, Malaysia, May 2022.
H. Zhu, W. Liu, J. Yin, M. Wang, J. Xu, X. Huang, and W.-C. Lee. "Continuous Geo-Social Group Monitoring over Moving Users." Proc. the 38th IEEE International Conference on Data Engineering (ICDE '22), Kuala Lumpur, Malaysia, May 2022.
G. Li, B. Choi, J. Xu, S. S. Bhowmick, D. N-Y. Mah and G. L-H. Wong. "IPS: Instance Profile for Shapelet Discovery for Time Series Classification." Proc. the 38th IEEE International Conference on Data Engineering (ICDE '22), Kuala Lumpur, Malaysia, May 2022.
Y. Li, Q. Wu, X. Huang, J. Xu, W. Gao, and M. Xu. "Efficient Adaptive Matching for Real-Time City Express Delivery." IEEE Transactions on Knowledge and Data Engineering (TKDE), accepted to appear, 2022.
Y. Li, R. Chen, J. Xu, S. Guo, J. Xue, and M. Xu. "Efficient Top-k Matching for Publish/Subscribe Ride Hitching." IEEE Transactions on Knowledge and Data Engineering (TKDE), accepted to appear, 2022.
X. Zhu, X. Huang, B. Choi, J. Xu, W. Cheung, Y. Zhang, and J. Liu. "Efficient and Optimal Algorithms for Tree Summarization with Weighted Terminologies." IEEE Transactions on Knowledge and Data Engineering (TKDE), accepted to appear, 2022.
T. Liu, Z. Feng, H. Li, H. Lu, M. A. Cheema, H. Cheng, and J. Xu. "Towards Indoor Temporal-variation aware Shortest Path Query." IEEE Transactions on Knowledge and Data Engineering (TKDE), accepted to appear, 2022.
H. Zhu, W. Liu, J. Yin, J. Xu, and W.-C. Lee. "Towards Keyword-based Geo-Social Group Query Services." IEEE Transactions on Services Computing (TSC), accepted to appear, 2022.
P. Yi, J. Li, B. Choi, S. S. Bhowmick and J. Xu. "FLAG: Towards Graph Query Autocompletion for Large Graphs." Springer Journal of Data Science and Engineering (DSE), accepted to appear, 2022.

Z. Peng, C. Xu, H. Wang, J. Huang, J. Xu, and X. Chu. "P²B-Trace: Privacy-Preserving Blockchain-based Contact Tracing to Combat Pandemics." Proc. the ACM SIGMOD International Conference on Management of Data (SIGMOD '21), Xi'an, China, June 2021.
Y. Huang, J. Tang, Q. Cong, A. Lim, and J. Xu. "Do the Rich Get Richer? Fairness Analysis for Blockchain Incentives." Proc. the ACM SIGMOD International Conference on Management of Data (SIGMOD '21), Xi'an, China, June 2021.
K. Huang, H-E. Chua, S. S. Bhowmick, B. Choi, S. Zhou. "MIDAS: Towards Efficient and Effective Maintenance of Canned Patterns in Visual Graph Query Interfaces." Proc. the ACM SIGMOD International Conference on Management of Data (SIGMOD '21), Xi'an, China, June 2021.
C. Xu*, C. Zhang*, J. Xu, and J. Pei. "SlimChain: Scaling Blockchain Transactions through Off-Chain Storage and Parallel Processing." Proc. the 47th International Conference on Very Large Data Bases (PVLDB '21), Copenhagen, Denmark, 2021. (*equal contribution)
X. Zhu, X. Huang, B. Choi, J. Jiang, Z. Zou, and J. Xu. "Budget Constrained Interactive Search for Multiple Targets." Proc. the 47th International Conference on Very Large Data Bases (PVLDB '21), Copenhagen, Denmark, 2021.
Q. Liu, X. Zhu, X. Huang, and J. Xu. "Local Algorithms for Distance-generalized Core Decomposition over Large Dynamic Graphs." Proc. the 47th International Conference on Very Large Data Bases (PVLDB '21), Copenhagen, Denmark, 2021.
T. N. Chan, Z. Li, L. H. U, J. Xu, and R. Cheng. "Fast Augmentation Algorithms for Network Kernel Density Visualization." Proc. the 47th International Conference on Very Large Data Bases (PVLDB '21), Copenhagen, Denmark, 2021.
Z. Dong, X. Huang, G. Yuan, H. Zhu, and H. Xiong. "Butterfly-Core Community Search over Labeled Graphs." Proc. the 47th International Conference on Very Large Data Bases (PVLDB '21), Copenhagen, Denmark, 2021.
X. Sun, X. Huang, Z. Sun, and D. Jin. "Budget-constrained Truss Maximization over Large Graphs: A Component-based Approach." Proc. of the ACM International Conference on Information and Knowledge Management (CIKM '21), Oct. 2021.
Z. Sun, X. Huang, J. Xu, and F. Bonchi. "Efficient Probabilistic Truss Indexing on Uncertain Graphs." Proc. the 30th Web Conference (WWW '21), Ljubljana, Slovenia, April 2021.
G. Li, B. Choi, J. Xu, S. S. Bhowmick, K-P Chun, and G. L-H. Wong. "ShapeNet: A Shapelet-Neural Network Approach for Multivariate Time Series Classification." Proc. the 35th AAAI Conference on Artificial Intelligence (AAAI '21), 2021.
C. Zhang, C. Xu, H. Wang, J. Xu, and B. Choi, "Authenticated Keyword Search in Scalable Hybrid-Storage Blockchains." Proc. the 37th IEEE International Conference on Data Engineering (ICDE '21), Chania, Crete, Greece, April 2021.
L. Xu, J. Jiang, B. Choi, J. Xu, and S. S. Bhowmick. "Privacy Preserving Strong Simulation Queries on Large Graphs." Proc. the 37th IEEE International Conference on Data Engineering (ICDE '21), Chania, Crete, Greece, April 2021.
Y. Li , H. Gu, R. Chen, J. Xu, and M. Xu. "Top-k Publish/Subscribe for Ride Hitching." Proc. the 37th IEEE International Conference on Data Engineering (ICDE '21), Chania, Crete, Greece, April 2021. (Short paper)
Z. Li, T. N. Chan, M. L. Yiu, and C. S. Jensen. "PolyFit: Polynomial-based Indexing Approach for Fast Approximate Range Aggregate Queries." Proc. International Conference on Extending Database Technology (EDBT '21), 2021.
Y. Peng, B. Choi and J. Xu. "Graph Edit Distance Learning via Modeling Optimum Matchings with Constraints." Proc. the 30th International Joint Conference on Artificial Intelligence (IJCAI '21), 2021.
W. Li, H. Zhu, W. Liu, J. Yin, and J. Xu. "Optimal Sequenced Route Query with POI Preferences." Proc. the 26th International Conference on Database Systems for Advanced Applications (DASFAA '21), Taipei, Taiwan, April 2021. (Best of DASFAA'21 / DSE Invitation!)
Z. Peng, J. Huang, H. Wang, S. Wang, X. Chu, X. Zhang, L. Chen, X. Huang, X. Fu, Y. Guo, and J. Xu. "BU-Trace: A Permissionless Mobile System for Privacy-Preserving Intelligent Contact Tracing." Proc. the 3rd International Workshop on Mobile Ubiquitous Systems and Technologies (MUST '21), Taipei, Taiwan, April 2021. (Best Paper Award)
Y. Jiang, X. Huang, and H. Cheng. "I/O Efficient K-Truss Community Search in Massive Graphs." The VLDB Journal (VLDBJ), accepted to appear, 2021.
L. Sun, X. Huang, R.-H. Li, B. Choi, and J. Xu. "Index-based Intimate-Core Community Search in Large Weighted Graphs." IEEE Transactions on Knowledge and Data Engineering (TKDE), accepted to appear, 2021.
J. Huang, X. Huang, and J. Xu. "Truss-based Structural Diversity Search in Large Graphs." IEEE Transactions on Knowledge and Data Engineering (TKDE), accepted to appear, 2021.
Z. Peng, J. Xu, X. Chu, S. Gao, Y. Yao, R. Gu, and Y. Tang. "VFChain: Enabling Verifiable and Auditable Federated Learning via Blockchain Systems." IEEE Transactions on Network Science and Engineering (TNSE), accepted to appear, 2021.
H. Zhu, X. Yang, B. Wang, W.-C. Lee, J. Yin, and J. Xu. "Processing Continuous k Nearest Neighbor Queries in Obstructed Space with Voronoi Diagrams." ACM Transactions on Spatial Algorithms and Systems (TSAS), 7(2): 8:1-8:27, 2021.
X. Cao, I. Tsang, and J. Xu. "Cold-start Active Sampling via γ-Tub." IEEE Transactions on Cybernetics (TCYB), accepted to appear, 2021.
Y. Peng, B. Choi, and J. Xu. "Graph Learning for Combinatorial Optimization: A Survey of State-of-the-Art." Springer Journal of Data Science and Engineering (DSE), 2021.
V. W-K. Hui, G. Li, S. Li, T. C-F. Yip, Y-K. Tse, V. W-C. Wong, G. L-H. Wong and B. Choi. "Novel Shapelet Patterns for Time Series Classification (TSC) for AFP and ALT to Predict HCC in Patients with Chronic Hepatitis B on Antiviral Treatment." J Hepatol 2021;75(2):S727.

Q. Liu, M. Zhao, X. Huang, J. Xu, and Y. Gao. "Truss-based Community Search over Large Directed Graphs." Proc. of the ACM SIGMOD Int'l Conf. on Management of Data (SIGMOD '20), Portland, OR, USA, June 2020.
Q. Liu, Y. Zhu, M. Zhao, X. Huang, J. Xu, and Y. Gao. "VAC: Vertex-Centric Attributed Community Search." Proc. the 36th IEEE International Conference on Data Engineering (ICDE '20), Dallas, Texas, USA, April 2020.
J. Jiang, X. Huang, B. Choi, J. Xu, S. S Bhowmick, and L. Xu. "PPKWS: An Efficient Framework for Keyword Search on Public-Private Networks." Proc. the 36th IEEE International Conference on Data Engineering (ICDE '20), Dallas, Texas, USA, April 2020.
R. Yang, X. Lin, J. Xu, Y. Yang, and L. He. "Optimizing Knowledge Graphs through Voting-based User Feedback." Proc. the 36th IEEE International Conference on Data Engineering (ICDE '20), Dallas, Texas, USA, April 2020.
Z. Feng, T. Liu, H. Li, H. Lu, L. Shou, and J. Xu. "Indoor Top-k Keyword-aware Routing Query." Proc. the 36th IEEE International Conference on Data Engineering (ICDE '20), Dallas, Texas, USA, April 2020.
T. Liu, Z. Feng, H. Li, H. Lu, M. A. Cheema, H. Cheng, and J. Xu. "Shortest Path Queries for Indoor Venues with Temporal Variations." Proc. the 36th IEEE International Conference on Data Engineering (ICDE '20), Dallas, Texas, USA, April 2020. (Short Paper)
X. Zhu, X. Huang, B. Choi, and J. Xu. "Top-k Graph Summarization on Hierarchical DAGs." Proc. of the ACM International Conference on Information and Knowledge Management (CIKM '20), Oct. 2020. (Best Paper Nominee Award)
K. Li, Y. Tang, J. Chen, Z. Yuan, C. Xu, J. Xu, and Q. Zhang. "Cost-Effective Data Feeds to Blockchains via Workload-Adaptive Data Replication." ACM/IFIP Middleware 2020, Delft, Netherlands, Dec. 2020.
J. Jiang, B. Choi, J. Xu, and S. S. Bhowmick. "A Generic Ontology Framework for Indexing Keyword Search on Massive Graphs." IEEE Transactions on Knowledge and Data Engineering (TKDE), accepted to appear, 2020.
Q. Liu, Z. Zhu, J. Xu, and Y. Gao. "MaxiZone: Maximizing Influence Zone over Geo-Textual Data." IEEE Transactions on Knowledge and Data Engineering (TKDE), accepted to appear, 2020.
G. Li, B. Choi, J. Xu, S. S. Bhowmick, K-P Chun and G. L-H. Wong. "Efficient Shapelet Discovery for Time Series Classification." IEEE Transactions on Knowledge and Data Engineering (TKDE), accepted to appear, 2020.
P. Yi, B. Choi, Z. Zhang, S. S. Bhowmick and J. Xu. "GFocus: User Focus-based Graph Query Autocompletion." IEEE Transactions on Knowledge and Data Engineering (TKDE), accepted to appear, 2020.
L. Chen, S. Shang, C. S. Jensen, J. Xu, P. Kalnis, B. Yao, and L. Shao. "Top-k Term Publish/Subscribe for Geo-Textual Data Streams." Very Large Data Bases Journal (VLDBJ), accepted to appear, 2020.
C. Wang, M. Xie, S. S. Bhowmick, B. Choi, X. Xiao, and S. Zhou. "FERRARI: an efficient framework for visual exploratory subgraph search in graph databases." Very Large Data Bases Journal (VLDBJ), accepted to appear, 2020.
H. Li, T. N. Chan, X. Qi, and W. Xie. "Detail-Preserving Multi-Exposure Fusion with Edge-Preserving Structural Patch Decomposition." IEEE Transactions on Circuits and Systems for Video Technology (TCSVT), accepted to appear, 2021.

C. Xu, C. Zhang, and J. Xu. "vChain: Enabling Verifiable Boolean Range Queries over Blockchain Databases." Proc. the ACM SIGMOD International Conference on Management of Data (SIGMOD '19), Amsterdam, Netherlands, 2019.
K. Huang, H. Chua, S. Bhowmick, B. Choi, and S. Zhou. "CATAPULT: Data-driven Selection of Canned Patterns for Efficient Visual Graph Query Formulation." Proc. the ACM SIGMOD International Conference on Management of Data (SIGMOD '19), Amsterdam, Netherlands, 2019.
S. Ebadian and X. Huang. "Fast Algorithm for K-Truss Discovery on Public-Private Graphs." Proc. the International Joint Conference on Artificial Intelligence (IJCAI '19), Macau SAR, China, 2019.
C. Zhang, C. Xu, J. Xu, Y. Tang, and B. Choi. "GEM^2-Tree: A Gas-Efficient Structure for Authenticated Range Queries in Blockchain." Proc. the 35th IEEE International Conference on Data Engineering (ICDE '19), Macau SAR, China, 2019.
Z. Zhang, X. Huang, J. Xu, B. Choi, and Z. Shang. "Keyword-Centric Community Search." Proc. the 35th IEEE International Conference on Data Engineering (ICDE '19), Macau SAR, China, 2019.
S. Guo, J. Xu, C. Zhang, C. Xu, and T. Xiang. "ImageProof: Enabling Authentication for Large-Scale Image Retrieval." Proc. the 35th IEEE International Conference on Data Engineering (ICDE '19), Macau SAR, China, 2019.
Z. Shang, J. X. Yu, and Z. Zhang. "TuFast: A Lightweight Parallelization Library for Graph Analytics." Proc. the 35th IEEE International Conference on Data Engineering (ICDE '19), Macau SAR, China, 2019.
L. Chen, S. Shang, C. S. Jensen, B. Yao, Z. Zhang, and L. Shao. "Effective and Efficient Reuse of Past Travel Behavior for Route Recommendation." ACM SIGKDD Conference on Knowledge Discovery and Data Mining (KDD '19), August 2019.
J. Huang, X. Huang, Y. Zhu, and J. Xu. "Parameter-Free Structural Diversity Search." Proc. 20th International Conference on Web Information Systems Engineering (WISE '19), Hong Kong, Nov. 2019. (Best Paper Award)
L. Sun, X. Huang, R.-H. Li, J. Xu. "Fast Algorithms for Intimate-Core Group Search in Weighted Graphs." Proc. 20th International Conference on Web Information Systems Engineering (WISE '19), Hong Kong, Nov. 2019.
H. Wang, X. Fu, J. Xu, and H. Lu. "Learned Index for Spatial Queries." Proc. the IEEE MDM Workshop on Mobile Ubiquitous Systems and Technologies (MUST '19), Hong Kong SAR, China, 2019.
Y. Fang, X. Huang, L. Qin, Y. Zhang, W. Zhang, R. Cheng, and X. Lin. "A Survey of Community Search Over Big Graphs." The VLDB Journal (VLDBJ), accepted to appear.
D. Jin, K. Wang, G. Zhang, P. Jiao, D. He, F. F.-Soulié, nd X. Huang. "Detecting Communities with Multiplex Semantics by Distinguishing Topics." IEEE Transactions on Knowledge and Data Engineering (TKDE), accepted to appear.
Y. Li, J. Wan, R. Chen, J. Xu, X. Fu, H. Gu, P. Lv, and M. Xu. "Top-k Vehicle Matching in Social Ridesharing: A Price-aware Approach." IEEE Transactions on Knowledge and Data Engineering (TKDE), accepted to appear.
X. Fu, C. Zhang, H. Lu, and J. Xu. "Efficient Matching of Offers and Requests in Social-Aware Ridesharing." Geoinformatics, accepted to appear.

C. Xu, J. Xu, H. Hu, and M. H. Au. "When Query Authentication Meets Fine-Grained Access Control: A Zero-Knowledge Approach." Proc. of the ACM SIGMOD International Conference on Management of Data (SIGMOD '18), Houston, TX, June 2018.
Y. Song, H-e. Chua, S. S. Bhowmick, B. Choi and S. Zhou. "BOOMER: Blending Visual Formulation and Processing of P -Homomorphic Queries on Large Networks." Proc. of the ACM SIGMOD International Conference on Management of Data (SIGMOD '18), Houston, TX, June 2018.
Y. Li, C. Sha, X. Huang, and Y. Zhang. "Community Detection in Attributed Graphs: An Embedding Approach." AAAI Conference on Artificial Intelligence (AAAI '18), 2018.
G. Zhang, D. Jin, J. Gao, P. Jiao, F. Fogelman-Soulié,and X. Huang. "Finding Communities with Hierarchical Semantics by Distinguishing General and Specialized Topics." International Joint Conference on Artificial Intelligence (IJCAI '18), 2018.
L. Chen, S. Shang, Z. Zhang, X. Cao, C. S. Jensen, and P. Kalnis. "Location-Aware Top-k Term Publish/Subscribe." Proc. the 34rd IEEE International Conference on Data Engineering (ICDE '18), Paris, April 2018.
G. Li, N. Ng, P. Yi, Z. Zhang, and B. Choi. "Answering the Why-Not Questions of Graph Query Autocompletion." Proc. of the 23rd International Conference on Database Systems for Advanced Applications (DASFAA '18), 2018.
C. Zhang, C. Xu, J. Xu, and B. Choi. "Distributed kNN Query Authentication." Proc. the 19th IEEE International Conference on Mobile Data Management (MDM '18), Aalborg, Denmark, June 2018, pp. 167-176.
X. Fu, C. Zhang, H. Lu, and J. Xu. "Efficient Matching of Offers and Requests in Social-Aware Ridesharing." Proc. the 19th IEEE International Conference on Mobile Data Management (MDM '18), Aalborg, Denmark, June 2018, pp. 197-206. (Best of MDM'18 / Geoinformatica Invitation!)
X. Huang, J. Jiang, B. Choi, J. Xu, Z. Zhang, and Y. Song. "PP-DBLP: Modeling and Generating Attributed Public-Private Networks with DBLP." Proc. the IEEE ICDM Workshop on Graph Analytics (GA '18), 2018.
Y. Tang, Z. Xing, C. Xu, J. Chen, and J. Xu. "Lightweight Logging over the Blockchain for Data-Intensive Applications." Proc. the Second Workshop on Trusted Smart Contracts at Financial Cryptography, Curaçao, March 2018.
C. Xu, Q. Chen, H. Hu, J. Xu, and X. Hei. "Authenticating Aggregate Queries over Set-Valued Data with Confidentiality." IEEE Transactions on Knowledge and Data Engineering (TKDE), accepted to appear.
L. Chen, Y. Li, J. Xu, and Christian S. Jensen. "Towards Why-Not Spatial Keyword Top-k Queries: A Direction-Aware Approach." IEEE Transactions on Knowledge and Data Engineering (TKDE), accepted to appear.
X. Cao, B. Qiu, X. Li, Z. Shi, G. Xu, and J. Xu. "Multidimensional Balance-based Cluster Boundary Detection for High Dimensional Data." IEEE Transactions on Neural Networks and Learning Systems (TNNLS), accepted to appear.

X. Huang and L. V.S. Lakshmanan. "Attribute-Driven Community Search." Proceedings of the VLDB Endowment (PVLDB 2017), 2017.
S. Shang, L. Chen, Z. Wei, C. S. Jensen, K. Zheng and P. Kalnis. "Trajectory Similarity Join in Spatial Networks". Proceedings of the VLDB Endowment (PVLDB 2017), 2017.
Q. Zhu, H. Cheng, and X. Huang. "I/O Efficient Algorithms for Top-K Nearest Keyword Search in Massive Graphs." The VLDB Journal (VLDBJ), accepted to appear.
P. Yi, B. Choi, S. S. Bhowmick and J. Xu. "AutoG: A Visual Query Autocompletion Framework for Graph Databases." The VLDB Journal (VLDBJ), accepted to appear.
W. Fan, Y. Wu, J. Xu, W. Yu, J. Jiang, Z. Zheng, B. Zhang, Y. Cao and C. Tian. "Parallelizing Sequential Graph Computations." Proc. of the 2017 ACM SIGMOD International Conference on Management of Data (SIGMOD'17), Raleigh, NC, USA, June 2017. (Best Paper Award)
X. Li, Y. Cheng, G. Cong, L. Chen. "Discovering Fine Grained Pollution Sources and Propagation Patterns in Urban Area". Proc. of the 23rd SIGKDD Conference on Knowledge Discovery and Data Mining (SIGKDD'17), Halifax, Nova Scotia, Canada, Raleigh, NC, USA, August 2017.
X. Xie, X. Lin, J. Xu, and C. S. Jensen. "Reverse Keyword-Based Location Search." Proc. the 33rd IEEE International Conference on Data Engineering (ICDE '17), San Diego, USA, April 2017.
Z. Chen, G. Cong, Z. Zhang, T. Z. Fu, and L. Chen. "Distributed Publish/Subscribe Query Processing on the Spatio-Textual Data Stream." Proc. the 33rd IEEE International Conference on Data Engineering (ICDE '17), San Diego, USA, April 2017.
L. Chen, Y. Li, J. Xu, and C. S. Jensen. "Direction-Aware Why-Not Spatial Keyword Top-k Queries." Proc. the 33rd IEEE International Conference on Data Engineering (ICDE '17), San Diego, USA, April 2017 (Short Paper).
X. Huang, B. Choi, J. Xu, W. Cheung, Y. Zhang and J. Liu. "Ontology-based Graph Visualization for Summarized View." Proc. of the International Conference on Information and Knowledge Management (CIKM '17), Singapore, Nov 2017 (Short Paper).
Z. Dong, J. Liu, R.-H. Li, C. Aslay, Y.-C. Chen, and X. Huang. "Querying Intimate-Core Groups in Weighted Graphs." Proc. the IEEE International Conference on Semantic Computing (ICSC '17), 2017. (Best Student Paper Award)
J. Xu, J. Xu, G. Cao, H. Xu, M. Xu, and N. Zheng. "Towards Optimal Free-of-Charge Trip Planning in Bike-Sharing Systems." Proc. the 18th IEEE International Conference on Mobile Data Management (MDM '17), Daejeon, South Korea, May 2017.
X. Fu, J. Huang, H. Lu, J. Xu, and Y. Li. "Top-k Taxi Recommendation in Realtime Social-Aware Ridesharing Services." Proc. the 15th International Symposium on Spatial and Temporal Databases (SSTD 2017), Washington DC, August 2017.
X. Lin, J. Xu, H. Hu, and Z. Fan. "Reducing Uncertainty of Probabilistic Top-k Ranking via Pairwise Crowdsourcing." IEEE Transactions on Knowledge and Data Engineering (TKDE), accepted to appear.
X. Lin, Y. Peng, B. Choi, and J. Xu. "Human-Powered Data Cleaning for Probabilistic Reachability Queries on Uncertain Graphs." IEEE Transactions on Knowledge and Data Engineering (TKDE), accepted to appear.
S. S. Bhowmick, H.-E. Chua, B. Choi, and C. Dyreson. "VISUAL: Simulation of Visual Subgraph Query Formulation To Enable Automated Performance Benchmarking." IEEE Transactions on Knowledge and Data Engineering (TKDE), accepted to appear.
S. Shang, L. Chen, C. S. Jensen, J.-R. Wen, P. Kalnis. "Searching Trajectories by Regions of Interest." IEEE Transactions on Knowledge and Data Engineering (TKDE), accepted to appear.
H. Hu, Q. Chen, J. Xu, and B. Choi. "Assuring Spatio-Temporal Integrity on Mobile Devices with Minimum Location Disclosure." IEEE Transactions on Mobile Computing (TMC), accepted to appear.
X. Fu, X. Miao, J. Xu, and Y. Gao. "Continuous Range-based Skyline Queries in Road Networks." Springer Journal of World Wide Web (WWWJ), accepted to appear.

L. Chen, J. Xu, X. Lin, C. S. Jensen, and H. Hu. "Answering Why-Not Spatial Keyword Top-k Queries via Keyword Adaption." Proc. the 32nd IEEE International Conference on Data Engineering (ICDE '16), Helsinki, Finland, May 2016.
Y. Peng, B. Choi, B. He, S. Zhou, R. Xu and X. Yu. "VColor: A Practical Vertex-cut Based Approach for Coloring Large Graphs." Proc. the 32nd IEEE International Conference on Data Engineering (ICDE '16), Helsinki, Finland, May 2016.
Z. Shang, F. Li, J.X. Yu, Z. Zhang and H. Cheng. "Graph Analytics Through Fine-Grained Parallelism." Proc. of the 2016 ACM SIGMOD International Conference on Management of Data (SIGMOD'16), San Francisco, CA, USA, June 2016.
S. S. Bhowmick, B. Choi and C. Dyreson. "Data-driven Visual Graph Query Interface Construction and Maintenance: Challenges and Opportunities [Vision]." Proc. of 42nd International Conference on Very Large Data Bases (PVLDB '16), New Delhi, India, September 2016 .
J. Jiang, P. Yi, B. Choi, Z. Zhang and X. Yu. "Privacy-Preserving Reachability Query Services for Massive Networks." Proc. of 25th ACM International Conference on Information and Knowledge Management (CIKM '16), Indianapolis, USA, October 2016.
M. Li, L. Chen, G. Cong, Y. Gu, and G. Yu. "Efficient Processing of Location-Aware Group Preference Queries." Proc. of 25th ACM International Conference on Information and Knowledge Management (CIKM '16), Indianapolis, USA, October 2016.
Y. Li, R. Chen, L. Chen, and J. Xu. "Towards Social-aware Ridesharing Group Query Services." IEEE Transactions on Services Computing (TSC), accepted to appear.

R. Chen, Q. Xiao, Y. Zhang, and J. Xu. "Differentially Private High-Dimensional Data Publication via Sampling-based Inference." Proc. of the 21st ACM SIGKDD Conference on Knowledge Discovery and Data Mining (SIGKDD '15), Sydney, Australia, August 2015.
Q. Chen, H. Hu, and J. Xu. "Authenticated Online Data Integration Services." Proc. of the ACM SIGMOD International Conference on Management of Data (SIGMOD '15), Melbourne, Australia, May/June 2015.
W. Fan, Z. Fan, C. Tian, and X. Dong. "Keys for Graphs." Proc. of 41st International Conference on Very Large Data Bases (PVLDB '15), Kohala Coast, Hawaii, USA, August/September 2015.
L. Chen, X. Lin, H. Hu, C. S. Jensen, and J. Xu. "Answering Why-not Questions on Spatial Keyword Top-k Queries." Proc. the 31st IEEE International Conference on Data Engineering (ICDE '15), Seoul, Korea, April 2015.
Z. Fan, B. Choi, J. Xu, and S. S. Bhowmick. "Asymmetric Structure-Preserving Subgraph Query for Large Graphs." Proc. the 31st IEEE International Conference on Data Engineering (ICDE '15), Seoul, Korea, April 2015.
S. S. Bhowmick, C. Dyreson, B. Choi, and M-H Ang. "Interruption-Sensitive Empty Result Feedback: Rethinking the Visual Query Feedback Paradigm for Semistructured Data." Proc. the 24th ACM International Conference on Information and Knowledge Management (CIKM '15), Melbourne, Australia, Oct 2015.
X. Lin, J. Xu, and H. Hu. "Reverse Keyword Search for Spatio-Textual Top-k Queries in Location-Based Services." IEEE Transactions on Knowledge and Data Engineering (TKDE), accepted to appear.
Z. Fan, B. Choi, Q. Chen, J. Xu, H. Hu and S. S. Bhowmick. "Structure-Preserving Subgraph Query Services." IEEE Transactions on Knowledge and Data Engineering (TKDE) 27(8):2275-2290, 2015.
Y. Li, R. Chen, J. Xu, Q. Huang, H. Hu, and B. Choi. "Geo-Social K-Cover Group Queries for Collaborative Spatial Computing." IEEE Transactions on Knowledge and Data Engineering (TKDE), accepted to appear.
D. Wang, J. Liu, J. Xu, H. Jiang, and C. Wang. "Data Sweeper: A Proactive Filtering Framework for Error-Bounded Sensor Data Collection." IEEE Transactions on Emerging Topics in Computing (TETC), accepted to appear.
Y. Lu, D. Wu, B. He, X. Tang, J. Xu, and M. Guo. "Rank-Aware Dynamic Migrations and Adaptive Demotions for DRAM Power Management." IEEE Transactions on Computers (TC), accepted to appear.

Q. Xiao, R. Chen, and K.-L. Tan. "Differentially Private Network Data Release via Structure Inference." Proc. the 20th ACM SIGKDD Conference on Knowledge Discovery and Data Mining (SIGKDD '14), New York City, USA, August 2014, accepted to appear.
Q. Chen, H. Hu, and J. Xu. "Authenticating Top-k Queries in Location-based Services with Confidentiality." Proceedings of the VLDB Endowment (PVLDB '14), accepted to appear.
Y. Peng, Z. Fan, B. Choi, J. Xu and S. S. Bhowmick. "Authenticated Subgraph Similarity Search in Outsourced Graph Databases." IEEE Transactions on Knowledge and Data Engineering (TKDE) 27(7):1838-1860, 2015.
D. Wu, B. Choi, J. Xu and C. S. Jensen. "Authentication of Moving Top-k Spatial Keyword Queries." IEEE Transactions on Knowledge and Data Engineering (TKDE), accepted to appear.
H. Hu, J. Xu, X. Xu, K. Pei, B. Choi, and S. Zhou. "Private Search on Key-Value Stores with Hierarchical Indexes." Proc. the 30th IEEE International Conference on Data Engineering (ICDE '14), Chicago, IL, USA, April 2014, accepted to appear.
R. Chen, Y. Peng, B. Choi, J. Xu and H. Hu. "A Private DNA Motif Finding Algorithm." Journal of Biomedical Informatics (JBI '14) 50:122-132 (2014).
E. Lo, N. Cheng, W. Lin, W. Hon and B. Choi. "MyBenchmark: Generating Databases for Query Workloads." The VLDB Journal (VLDBJ), accepted to appear.
X. Zhang, R. Chen, J. Xu, X. Meng, and Y. Xie. "Towards accurate histogram publication under differential privacy." Proc.the 14th SIAM International Conference on Data Mining (SDM '14), accepted to appear.
R. Chen, M. Xie and L. V.S. Lakshmanan. "Thwarting Passive Privacy Attacks in Collaborative Filtering." Proc. the 19th International Conference on Database Systems for Advanced Applications (DASFAA '14), Bali, Indonesia, April 2014.
S. Yin, Z. Fan, P. Yi, B. Choi, J. Xu and S. Zhou. "Privacy-Preserving Reachability Query Services." Proc. the 19th International Conference on Database Systems for Advanced Applications (DASFAA '14), Bali, Indonesia, April 2014.
P. Yi, Z. Fan, and S. Yin. "Privacy-Preserving Reachability Query Services for Sparse Graphs." Proc. the 5th International Workshop on Graph Data Management: Techniques and Applications (GDM '14), Chicago, IL, USA, April 2014.

R. Chen, B. C.-M. Fung, P. S. Yu and B. C. Desai. "Correlated Network Data Publication via Differential Privacy." The VLDB Journal (VLDBJ), accepted to appear.
Z. Fan, Y. Peng, B. Choi, J. Xu and S. S. Bhowmick. "Towards Efficient Authenticated Subgraph Query Service in Outsourced Graph Databases." IEEE Transactions on Services Computing (TSC), accepted to appear.
X. Lin, J. Xu, H. Hu, and W.-C. Lee. "Authenticating Location-Based Skyline Queries in Arbitrary Subspaces." IEEE Transactions on Knowledge and Data Engineering (TKDE), accepted to appear.
X. Lin, H. Hu, H. P. Li, J. Xu, and B. Choi. "Private Proximity Detection and Monitoring with Vicinity Regions." Proceedings of 12th International ACM SIGMOD Workshop on Data Engineering for Wireless and Mobile Access (MobiDE '13), New York, New York, June 2013.
H. P. Li, H. Hu, and J. Xu. "Nearby Friend Alert: Location Anonymity in Mobile Geo-Social Networks." IEEE Pervasive Computing (PC), accepted to appear.
S. T. On, S. Gao, B. He, M. Wu, Q. Luo, and J. Xu. "FD-Buffer: A Cost-Based Adaptive Buffer Replacement Algorithm for Flash Memory Devices." IEEE Transactions on Computers (TC), accepted to appear.
Y. Peng, B. Choi, J. Xu, H. Hu, and S. S. Bhowmick. "Side-Effect Estimation: A Filtering Approach to the View Update Problem" IEEE Transactions on Knowledge and Data Engineering (TKDE) 26(9):2307-2322 (2014).
X. Lin, J. Xu, and H. Hu. "Range-based Skyline Queries in Mobile Environments." IEEE Transactions on Knowledge and Data Engineering (TKDE), 25(4): 835-849, April 2013.
J. Deng, B. Choi, J. Xu, H. Hu, and S. S. Bhowmick. "Incremental Maintenance of the Minimum Bisimulation of Cyclic Graphs" IEEE Transactions on Knowledge and Data Engineering (TKDE), accepted to appear.
Y. Li, S. T. On, J. Xu, H. Hu, and B. Choi. "Optimizing Non-Indexed Join Processing for Flash Storage based Systems." IEEE Transactions on Computers (TC), 62(7): 1417-1431, July 2013.
H-H. Hung, S. S. Bhowmick, B-Q. Truong, B. Choi and S. Zhou. "QUBLE: Towards Blending Interactive Visual Subgraph Search Queries on Large Networks." The VLDB Journal (VLDBJ) , accepted to appear.
L. Chen, G. Cong, C. S. Jensen and D. Wu. "Spatial Keyword Query Processing: An Experimental Evaluation." Proc. of the VLDB Endowment (PVLDB '13) , accepted to appear.
S. S. Bhowmick, B. Choi and S. Zhou. "VOGUE: Towards A Visual Interaction-aware Graph Query Processing Framework." Proc. the 6th Biennial Conference on Innovative Data Systems Research (CIDR '13).
L. Song, Y. Peng, B. Choi, J. Xu and B. He. "Spectral Decomposition for Optimal Graph Index Prediction." Proc. the 17th Pacific-Asia Conference on Knowledge Discovery and Data Mining (PAKDD '13), Gold Coast, Australia, April 2013, pp. 187-200.

H. Hu, J. Xu, Q. Chen, and Z. Yang. "Authenticating Location-based Services without Compromising Location Privacy." Proc. of the 2012 ACM SIGMOD International Conference on Management of Data (SIGMOD '12), Scottsdale, Arizona, USA, May 2012.
C. Jin, S. S. Bhowmick, B. Choi, and S. Zhou. "PRAGUE: Towards Blending Practical Visual Subgraph Query Formulation and Query Processing." Proc. the 28th IEEE International Conference on Data Engineering (ICDE '12), April 2012.
R. Chen, X. Weng, B. He, M. Yang, B. Choi, and X. Li. "Improving Large Graph Processing on Partitioned Graphs in the Cloud." Proc. of ACM Symposium on Cloud Computing (SOCC '12), San Jose, USA, October 2012.
D. Wu, B. He, X. Tang, J. Xu, M. Guo. "RAMZzz: Rank-Aware DRAM Power Management with Dynamic Migrations and Demotions." ACM/IEEE SuperComputing (SC12), November 2012.
S. T. On, J. Xu, B. Choi, H. Hu, and B. He. "Flag Commit: Supporting Efficient Transaction Recovery in Flash-based DBMSs." IEEE Transactions on Knowledge and Data Engineering (TKDE), 24(9): 1624-1639, 2012.
X. Pan, J. Xu, and X. Meng. "Protecting Location Privacy against Location-Dependent Attacks in Mobile Services." IEEE Transactions on Knowledge and Data Engineering (TKDE), 24(8): 1506-1519, 2012.
Dingming Wu, Gao Cong, Christian S. Jensen. "A Framework for Efficient Spatial Web Object Retrieval." The VLDB Journal (VLDBJ), 21(6): 797-822, 2012.
Z. Huo, X. Meng, H. Hu, and Y. Huang. "You Can Walk Alone: Trajectory Privacy-preserving through Significant Stays Protection." Proc. of the 17th International Conference on Database Systems for Advanced Applications (DASFAA '12), April 2012.
Yafei Li, Dingming Wu, Jianliang Xu, Byron Choi, Weifeng Su. "Spatial-aware interest group queries in location-based social networks." Proc. the 21st ACM International Conference on Information and Knowledge Management (CIKM '12), 2643-2646.
Yi Ou, Jianliang Xu, Theo Härder. "Towards an Efficient Flash-Based Mid-Tier Cache.", Proc. the 23rd International Conference on Database and Expert Systems Applications (DEXA '12), 55-70.
Xin Lin, Jianliang Xu, Junzhong Gu. "Continuous Skyline Queries with Integrity Assurance in Outsourced Spatial Databases." Proc. the 13th International Conference on Web-Age Information Management (WAIM '12), 114-126.

Y. Tang, J. Xu, S. Zhou, W.-C. Lee, D. Deng, and Y. Wang. "A Lightweight Multi-dimensional Index for Complex Queries over DHTs." IEEE Transactions on Parallel and Distributed Systems (TPDS), 22(12): 2046-2054, Dec. 2011.
X. Lin, J. Xu, H. Hu. "Authentication of Location-based Skyline Queries." Proc. the 20th ACM Conference on Information and Knowledge Management (ACM CIKM '11), Glasgow, Scotland, UK, October 2011. (Short Paper)
S. Gao, J. Xu, B. He, B. Choi, and H. Hu. "PCMLogging: Reducing Transaction Logging Overhead with PCM." Proc. the 20th ACM Conference on Information and Knowledge Management (ACM CIKM '11), Glasgow, Scotland, UK, October 2011. (Poster Paper)
J. Deng, F. Liu, Y. Peng, B. Choi, and J. Xu. "Predicting the Optimal Ad-hoc Index for Reachability Queries on Graph Databases." Proc. the 20th ACM Conference on Information and Knowledge Management (ACM CIKM '11), Glasgow, Scotland, UK, October 2011. (Poster Paper)
Z. Yang, S. Gao, J. Xu, and B. Choi. "Authentication of Range Query Results in MapReduce Environments." Proc. the 3rd ACM Workshop on Cloud Data Management (CloudDB '11), October 2011.
H. Hu, J. Xu, C. Ren and B. Choi. "Processing Private Queries over Untrusted Data Cloud through Privacy Homomorphism." Proc. the 27th IEEE International Conference on Data Engineering (ICDE '11), Hannover, Germany, April 2011.
Y. Peng, B. Choi and J. Xu. "Selectivity Estimation of Twig Queries on Cyclic Graphs." Proc. the 27th IEEE International Conference on Data Engineering (ICDE '11), Hannover, Germany, April 2011.
J. Deng, B. Choi, J. Xu and S. Bhowmick. "Optimizing Incremental Maintenance of Minimal Bisimulation of Cyclic Graphs." Proc. the 16th International Conference on Database Systems for Advanced Applications (DASFAA '11), Hong Kong, China, April 2011.

H. Hu, J. Xu, S. T. On, J. Du, and J. K. Ng. "Privacy-Aware Location Data Publishing." ACM Transactions on Database Systems (TODS), 35(3), July 2010. [pdf]
H. Hu and J. Xu. "2PASS: Bandwidth-Optimized Location Cloaking for Anonymous Location-Based Services." IEEE Transactions on Parallel and Distributed Systems (TPDS), 21(10): 1458-1472, October 2010. [pdf]
R. Bramandia, B. Choi, and W-K. Ng. "Incremental Maintenance of 2-hop Labeling of Large Graphs." IEEE Transactions on Knowledge and Data Engineering (TKDE) 22(5): 682-698, May 2010.
H. Hu, J. Xu, and D. L. Lee. "PAM: An Efficient and Privacy-Aware Monitoring Framework for Continuously Moving Objects." IEEE Transactions on Knowledge and Data Engineering (TKDE), 22(3): 404-419, March 2010. [pdf]
J. Xu, X. Tang, H. Hu, and J. Du. "Privacy-Conscious Location-Based Queries in Mobile Environments." IEEE Transactions on Parallel and Distributed Systems (TPDS), 21(3): 313-326, March 2010. [pdf]
Y. Tang, S. Zhou, and J. Xu. "LIGHT: A Query-Efficient yet Low-Maintenance Indexing Scheme over DHTs." IEEE Transactions on Knowledge and Data Engineering (TKDE), 22(1): 59-75, Jan. 2010. [pdf]
L. Zhu, A. Sun and B. Choi. "Detecting Spam-blogs from Blog Search Results." Information Processing and Management (IPM), to appear.
S. T. On, H. Hu, Y. Li, and J. Xu. "Flash-Optimized B+-Tree." Journal of Computer Science and Technology (JCST), 5(3): 507-520, May 2010.
C. Jin, S. S Bhowmick, X. Xiao, J. Cheng and B. Choi. "GBLENDER: Towards Blending Visual Query Formulation and Query Processing in Graph Databases." Proc. the 29th ACM SIGMOD International Conference on Management of Data (SIGMOD '10), Indianapolis, USA, June 2010.
Y. Li, J. Xu, B. Choi, and H. Hu. "StableBuffer: Optimizing Write Performance for DBMS Applications on Flash Devices." Proc. the 19th ACM International Conference on Information and Knowledge Management (CIKM '10), Toronto, Canada, October, 2010.
S. T. On, Y. Li, B. He, M. Wu, Q. Luo, and J. Xu. "FD-Buffer: A Buffer Manager for Databases on Flash Disks." Proc. the 19th ACM International Conference on Information and Knowledge Management (CIKM '10), Toronto, Canada, October, 2010. (Short paper)
B. Choi, H. Hu, J. Xu, W. Cheung, C. H. Li and J. Liu. "Data Engineering in Graph Databases." Proc. the 25th International Symposium on Computer and Information Sciences (ISCIS '10), Invited Paper, London, UK, September, 2010.
M. Cheng, B. Choi and W. Cheung. "Hiding Emerging Patterns with Local Recoding Generalization" Proc. the 14th Pacific-Asia Conference on Knowledge Discovery and Data Mining (PAKDD '10), Hyderabad, India, June 2010.
X. Liu, J. Xu, and W.-C. Lee. "A Cross Pruning Framework for Top-k Data Collection in Wireless Sensor Networks." Proc. the 11th International Conference on Mobile Data Management (MDM '10), Kanas City, Missouri, USA, May 2010.
X. Liu, M. Ye, J. Xu, Y. Tian, and W.-C. Lee. "k-Selection Query over Uncertain Data." Proc. the 15th International Conference on Database Systems for Advanced Applications (DASFAA '10), Tsukuba, Japan, April 2010. (Best Student Paper Award Runner-up)

R. Bramandia, J. Cheng, B. Choi and J. X. Yu. "Optimizing Updates of Recursive XML Views of Relations." VLDB Journal, 18(5): 1313-1333, 2009.
J. Yu, J. Guan, J. Xu, and S. Zhou. "Towards Keyword Search over Relational Databases in DHT Networks." Proc. the 15th Int. Conf. on Parallel and Distributed Systems (ICPADS '09), pages 449-455, Dec. 2009.
X. Pan, X. Meng, and J. Xu. "Distortion-based Anonymity for Continuous Queries in Location-Based Mobile Services." Proc. the 17th ACM SIGSPATIAL Int'l Conference on Advances in Geographic Info rmation Systems (ACM GIS '09), Seattle, USA, November 2009.
Y. Tang, J. Xu, S. Zhou, and W.-C. Lee. "m-LIGHT: Indexing Multi-Dimensional Data over DHTs." Proc. the 29th IEEE Int'l Conference on Distributed Computing Systems (ICDCS '09), Montreal, Quebec, Canada, May 2009. [pdf]
Y. Li, S. T. On, J. Xu, B. Choi, and H. Hu. "DigestJoin: Exploiting Fast Random Reads for Flash-based Joins." Proc. the 10th International Conference on Mobile Data Management (MDM '09), Taipei, Taiwan, May 2009. [pdf]
S. T. On, H. Hu, Y. Li, and J. Xu. "Lazy-Update B+-Tree for Flash Devices." Proc. the 10th International Conference on Mobile Data Management (MDM '09), Taipei, Taiwan, May 2009. [pdf]
H. Hu and J. Xu. "Non-Exposure Location Anonymity." Proc. IEEE 25th International Conference on Data Engineering (ICDE '09), Shanghai, China, March 2009. [pdf]

X. Tang, J. Xu, and W.-C. Lee. "Analysis of TTL-Based Consistency in Unstructured Peer-to-Peer Networks." IEEE Transactions on Parallel and Distributed Systems (TPDS), 19(12): 1683-1694, Dec. 2008. [pdf]
X. Tang and J. Xu. "Optimizing Lifetime for Continuous Data Aggregation with Precision Guarantees in Wireless Sensor Networks." IEEE/ACM Transactions on Networking (ToN), 16(4): 904-917, August 2008. [pdf]
X. Tang and J. Xu. "Adaptive Data Collection Strategies for Lifetime-Constrained Wireless Sensor Networks." IEEE Transactions on Parallel and Distributed Systems (TPDS), 19(6): 721-734, June 2008. [pdf]
J. Xu, X. Tang, and W.-C. Lee. "A New Storage Scheme for Approximate Location Queries in Object Tracking Sensor Networks." IEEE Transactions on Parallel and Distributed Systems (TPDS), 19(2): 262-275, Feb. 2008. [pdf]
B. Choi, G. Cong, W. Fan and S. D. Viglas. "Updating Recursive XML Views of Relations." Journal of Computer Science and Technology (JCST), 23(4): 516-537, July 2008.
D. Wang, J. Xu, J.-C. Liu, and F. Wang. "Mobile Filtering for Error-Bounded Data Collection in Sensor Networks." Proc. the 28th IEEE Int. Conf. on Distributed Computing Systems (ICDCS '08), Beijing, China, June 2008. [pdf]
X. Pan, J. Xu, X. Meng. "Protecting Location Privacy against Location-Dependent Attack in Mobile Services." ACM CIKM '08, Napa Valley, CA, Oct. 2008. (Poster Paper)
N. Tang, J. X. Yu, M. T. Ozsu, B. Choi and K-F. Wong. "Multiple Materialized View Selection for XPath Query Rewriting." Proc. IEEE 24th International Conference on Data Engineering (ICDE '08), Cancun, Mexico, April 2008, Page 873-882.
D. Wang, J. Xu, J.-C. Liu, and F. Wang. "Mobile Filter: Exploring Migration of Filters for Error-Bounded Data Collection in Sensor Networks." Proc. IEEE 24th International Conference on Data Engineering (ICDE '08), Cancun, Mexico, April 2008. (Poster Paper) [pdf]

M. Wu, J. Xu, X. Tang, and W.-C. Lee. "Top-k Monitoring in Wireless Sensor Networks." IEEE Transactions on Knowledge and Data Engineering (TKDE), 19(7): 962-976, July 2007. [pdf]
J. Xu, W.-C. Lee, X. Tang, Q. Gao, and S. Li. "An Error-Resilient and Tunable Distributed Indexing Scheme for Wireless Data Broadcast." IEEE Transactions on Knowledge and Data Engineering (TKDE), 18(3): 392-404, March 2006. [pdf]
J. Xu, X. Tang, and W.-C. Lee. "Scheduling Time-Critical On-Demand Broadcast: Algorithms, Analysis, and Performance Evaluation." IEEE Transactions on Parallel and Distributed Systems (TPDS), 17(1): 3-14, Jan. 2006. [pdf]
B. Zheng, J. Xu, W.-C. Lee, and D. L. Lee. "Grid-Partition Index: A Hybrid Method for Nearest-Neighbor Queries in Wireless Location-Based Services." VLDB Journal (VLDBJ), 15(1):21-39, Jan. 2006. [pdf]
J. Xu, B. Zheng, W.-C. Lee, and D. L. Lee. "The D-tree: An Index Structure for Planar Point Queries in Location-Based Wireless Services." IEEE Transactions on Knowledge and Data Engineering (TKDE), 16(12): 1526-1542, Dec. 2004. [pdf]
J. Xu, Q. Hu, W.-C. Lee, and D. L. Lee. "Performance Evaluation of an Optimal Cache Replacement Policy for Wireless Data Dissemination." IEEE Transactions on Knowledge and Data Engineering (TKDE), 16(1): 125-139, Jan. 2004. [pdf]
J. Xu, X. Tang, and D. L. Lee. "Performance Analysis of Location-Dependent Cache Invalidation Schemes for Mobile Environments." IEEE Transactions on Knowledge and Data Engineering (TKDE), 15(2): 474-488, March/April 2003. [pdf]
X. Tang and J. Xu. "Extending Network Lifetime for Precision-Constrained Data Aggregation in Wireless Sensor Networks." INFOCOM '06, Barcelona, Spain, April 2006. [pdf]
Y. Xu, W.-C. Lee, J. Xu, and G. Mitchel. "Processing Window Queries in Wireless Sensor Networks." Proc. the 22nd IEEE Int. Conf. on Data Engineering (ICDE '06), Atlanta, GA, April 2006. [pdf]
H. Hu, J. Xu, and D. L. Lee. "A Generic Framework for Monitoring Continuous Spatial Queries over Moving Objects." Proc. the ACM SIGMOD Conference (SIGMOD '05), Baltimore, MD, June 2005. [pdf]
H. Hu, J. Xu, W. S. Wong, B. Zheng, D. L. Lee, and W.-C. Lee. "Proactive Caching for Spatial Queries in Mobile Environments." Proc. the 21th IEEE Int. Conf. on Data Engineering (ICDE '05), Tokyo, Japan, April 2005. [pdf]
J. Xu, W.-C. Lee, and X. Tang. "Exponential Index: A Parameterized Distributed Indexing Scheme for Data on Air." Proc. the 2nd ACM/USENIX Int. Conf. on Mobile Systems, Applications, and Services (MobiSys '04), Boston, MA, June 2004, pp. 153 - 164. [pdf]
X. Tang and J. Xu. "On Replica Placement for QoS-Aware Content Distribution." INFOCOM '04, Hong Kong, March 2004, pp. 806-815. [pdf]
J. Xu, B. Zheng, W.-C. Lee, and D. L. Lee. "Energy Efficient Index for Querying Location-Dependent Data in Mobile Broadcast Environments." Proc. the 19th IEEE Int. Conf. on Data Engineering (ICDE '03), Bangalore, India, March 2003, pp. 239-250. [pdf]