Introductions
WAMDM means " Web And Mobile Data Management", Which is Professor Xiaofeng Meng's research lab and is affiliated with the Key Laboratory for Data Engineering and Knowledge Engineering MOE and the Department of Computer Science, School of Information, Renmin University of China.

The research vision in WAMDM is how database techniques would fit into the Web and Mobile computing environments. The research style in our lab is having two tracks - research and system - in order to ensure that the research is actually applied. Innovative data systems research is our goal.

WAMDM Lab has been conducting database related research for many years, and is considered one of the best database groups in the country. It's projects range from the Web Data Management, XML Data Management to Mobile Data Management in the past ten years. Now we are focusing on Cloud data management, databases for new storage hardware, privacy protection for mobile Web, social computing etc. in the new decade.

The site contains information on the projects that are currently in progress and the people in the group. You can also find information on the weekly seminar and annual report. In addition, this site hosts the following webpages:

[Systems]
ScholarExplorer ScholarSpace(C-DBLP)
OrientDP:Differential Privacy Protection Principle and Application System TaijiDB:Cloud Database Management System
OrientX:Native XML Database Management System COLA:Cloud-Based System for Online Aggregation
FlashDB:Flash-based Database Systems OrientSpace:Personal DataSpace Management System
[Conferences & Others]
PSBD 2017 ChinaPrivacy 2016
HardBD 2016  HardBD 2015  HardBD 2014 CloudDM 2016  CloudDM 2015  CloudDB 2014
WAIM 2013 NCSC 2012
XLDB Asia 2012 HardBD 2013  FlashDB2012    FlashDB2011
CloudDB2013 CloudDB2012 CloudDB2011 CloudDB2010 CloudDB2009 NDBC2010
MDM2008 WISA2007
CCF BigData 2013 Database Society of China Computer Federation

Hot Events  
Lab Seminars
  • 2017-05-12 Introduction of Generative Adversarial Networks by Shuo Wang
  • Abstract: This introduction includes 5 parts as follow:(1) Why generative modeling is a topic worth studying, (2) how generative models work, and how GANs compare to other generative models, (3)the details of how GANs work, (4) research frontiers in GANs, and (5)state-of-the-art image models that combine GANs with other methods.
  • 2017-05-12 System and Application Based on Differential Privacy Protection by Kaidi Qin
  • Abstract: In recent years, with the arrival of big data era, the data privacy protection has attracted more and more attention. As a result, how to protect the data releasing, storaging and analysising effectively has become a hot issue. Many of the traditional privacy protection technologies rely on specific background knowledges, such as k-anonymous and other privacy protection methods, and they will be invalid without those specific background knowledges. Therefore, in recent years, there have appeared differential privacy protection technology. It is an emerging data privacy protection method that does not rely on the specific background knowledges of data sets, which is a robust privacy protection strategy.At present, the research on the differential privacy protection is mostly at the theoretical level, and the related principle display system is very few. Therefore, this research has developed a principle display and verification system based on the differential privacy protection strategy, and protects the car coordinate privacy, which achieves good results.
    Invited Talks
    • Prof. Meng. Keynote speech. "Big Data Privacy Management". CNCC 2014 Open Data and Privacy Management Forum . 2014-10-25. Zhengzhou. [News]
    • Prof. Meng. Keynote speech. 2014 High Education Information Summit. 2014-05-07. Xi'an. [News]
    • Prof. Meng. Invited Talk. "Big Data: Challenge and Oppotunity". China Info 100. 2013-07-01. ShangHai. [News]
    • Prof. Meng. Opening Speech. "Introduction to WAIM2013". WAIM2013. 2013-06-15. Beidaihe. [PPT]
    • Prof. Meng. Invited Talk. " Cloud Computing and Big Data". Yanshan University. 2013-05-20. Qinhuangdao.
    • Prof. Meng. Invited Talk. " Cloud Computing and Big Data". Hebei University of Engineering. 2013-05-07. Handan.
    • Prof. Meng. Invited Talk. " Cloud Computing and Big Data". Taiyuan University of Technology 2013-05-06. Taiyuan.
    • Prof. Meng. Invited Talk. " Research and Teaching". Beijing Young Teachers Training . 2013-04-13. Xiangshan, Beijing. [News]
    • Prof. Meng. Invited Talk. " Cloud Computing and Big Data". University of Macau. 2012-12-29. Macau.
    • Prof. Meng Xiaofeng. Keynote Speech. " Big Data and Scoial Computing". 2012 Annual Meeting of China Management Science and Engineering Society, and the 10th Management Science and Engineering Forum of China. 2012-10-21. Yantai University, Shandong. [PPT]
    • Prof. Meng Xiaofeng. Keynote Speech. " Flash-based Database Systems". NDBC2012. 2012-10-13. Hefei, Anhui. [PPT]
    • Prof. Meng. Invited Talk. " Cloud Computing and Big Data". Forum of Future Data. 2012-06-30. Mount Wuyi. Fujian. [PPT]
    • Prof. Meng. Invited Talk. "The Change of Database Research". Tsinghua University. 2012-05-26. Beijing. [PPT]
    • Prof. Meng. Invited Talk. "Sailing in Web Data Ocean". Beijing University of Technology. 2012-05-16. Beijing.[News]
    [more]
    News
  • [Jan 05,2017] Large-scale Industry-specific Knowledge Graph Building Seminar Hosted by WAMDM[Detail]
  • [Dec 09,2016] Big Data Management Based on New Hardware Seminar Hosted by WAMDM[Detail]
  • [Nov 07,2016] The First China Privacy Protection Conference Hosted by WAMDM[Detail]
  • [Dec 02,2015] Big Data Architecture Seminar Hosted by WAMDM Lab[Detail]
  • [Nov 06,2015] Prof Meng Gave the keynote speech on the 2015 International CAE Symposium on Ubiquitous Syrveying, Mapping and Big Data of Locations[Detail]
  • [Oct 29,2015] Prof Meng Visiting Purdue University[Detail]
  • [July 17,2015] Prof Meng gave an invited talk at Tianjin University of Technology[Detail]
  • [May 14,2015] Big Data Privacy Management Seminar Hosted by WAMDM Lab[Detail]
  • [Apr 08,2015] Complex Correlation Data Management Seminar Hosted by WAMDM Lab[Detail]
  • [Jan 20,2015] Prof Elisa Bertino from Purdue University visiting WAMDM Lab[Detail]
  • [Oct 30,2014] Prof Meng Chaired "Open Data and Privacy Management Forum" on CNCC2014[Detail]
  • [Oct 28,2014] Big Data paper selected in Frontrunner 5000 (Top Articles from Outstanding S&T Journals in China)[Detail]
  • [May 07,2014] Prof Meng gave Keynote speech on 2014 High Education Information Summit. Xi'an, May 7, 2014[Detail]
  • [Apr 16,2014] CCF@U193:Prof Meng gave invited talk in Beijing Technology and Business University[Detail]
  • [Jan 06,2014]Prof. Meng elected 2013 CCF Fellow [Detail]
  • [more]
    Recent and Selected Publications
  • J. Wang, Z. Guo, X. Meng. An Efficient Design and Implementation of Multi-Level Cache for Database Systems. Accepted for publication in Proceedings of the 20th International Conference on Database Systems for Advanced Applications (DASFAA 2015), Hanoi, Vietnam. (Full Paper)
  • J. Wang, Z. Guo, X. Meng. SASS: A High-Performance Key-Value Store Design for Massive Hybrid Storage. Accepted for publication in Proceedings of the 20th International Conference on Database Systems for Advanced Applications (DASFAA 2015), Hanoi, Vietnam. (Full Paper)
  • L. Wang, X. Meng, H. Hu, J. Xu. Bichromatic Reverse Nearest Neighbor Query without Information Leakage. Accepted for publication in Proceedings of the 20th International Conference on Database Systems for Advanced Applications (DASFAA 2015), Hanoi, Vietnam. (Full Paper)
  • Y. Ma, X. Meng. Set similarity join on massive probabilistic data using MapReduce. Distributed and Parallel Databases. Vol 32(3): 447-464, 2014.[PDF]
  • Y. Fan, W. Lai, X. Meng. Optimizing Database Operators by Exploiting Internal Parallelism of Solid State Drives. IEEE Data Eng. Bull. Vol 37(2): 12-18, 2014.[PDF]
  • X. Zhang, R. Chen, J. Xu, X. Meng. Towards Accurate Histogram Publication under Differential Privacy. Accepted for publication in Proceedings of the 14th SIAM International Conference on Data Mining (SDM 2014): 587-595, Philadelphia, Pennsylvania, USA. (Full Paper)[PDF]
  • J. Zhou, Z. Bao, W. Wang, J. Zhao, X. Meng: Efficient Query Processing for XML Keyword Queries based on the IDList Index. Accepted by VLDBJ. Vol 23(1): 25-50, 2014.[PDF]
  • Z. Huo, X. Meng, R. Zhang: Feel Free to Check In: Privacy Alert against Hidden Location Inference Attacks in GeoSN. In Processings of the 18th International Conference on Database Systems for Advanced Applications (DASFAA 2013): 377-491. April 22-25, 2013, Wuhan, China. (Regular paper)[PDF]
  • X. Zhang, X. Meng, R. Chen: Differential Private Set-Valued Data Release against Incremental Updates. In Proceedings of the 18th International Conference on Database Systems for Advanced Applications (DASFAA 2013): 392-406. April 22-25, 2013, Wuhan, China. (Regular paper)[PDF]
  • Y. Gan, X. Meng, Y. Shi: COLA: A Cloud-based System for Online Aggregation (Demonstration). In Proceedings of the 29th International Conference on Data Engineering(ICDE2013): 1368-1371, April 8-12, 2013, Brisbane, Australia.[PDF]
  • W. Cao, D. SHASHA: AppSleuth: a Tool for Database Tuning at the Application Level. In Proceedings of the 16th International Conference on Extending Database Technology (EDBT2013): 589-600. March 18-22, Genoa, Italy.[PDF]
  • D. SHASHA, W .Cao: Tuning in Action (Demonstration) In Proceedings of the 16th International Conference on Extending Database Technology (EDBT 2013): 737-740. March 18-22, Genoa, Italy.[PDF]
  • Y. Ma, J. Rao, W. Hu, X. Meng, X. Han, Y. Zhang, Y. Chai, C. Liu: An Efficient Index for Massive IOT Data in Cloud Environment. In Proceedings of the 21st ACM Conference on Information and Knowledge Management(CIKM2012), page: 2129-2133, Oct.29 - Nov.2, 2012, Maui, USA.(Short paper)[PDF]
  • Y. Shi, X. Meng, F. Wang, Y. Gan : You can stop early with COLA: Online processing of aggregate queries in the cloud. In Proceedings of the 21st ACM Conference on Information and Knowledge Management(CIKM2012), pages: 1223-1232, Oct.29 - Nov.2, 2012, Maui, USA.(Full paper)[PDF]
  • J. Wen, X. Meng, X. Hao and J. Xu: An Efficient Approach for Continuous Density Queries. Frontiers of Computer Science, Vol 6(5): 581-595, 2012. [PDF]
  • J. Zhou, T. Ling, Z. Bao, X. Meng: Related Axis: The Extension to XPath Towards Effective XML Search. Journal of Computer Science and Technology, Vol.27(1):195-212, 2012,1.[PDF]
  • Y.Shi, X.Meng, B. Liu: Halt or Continue: Estimating the Progress of Queries in the Cloud. In Proceedings of the 17th International Conference on Database Systems for Advanced Applications (DASFAA2012): pages 169-184, April 15-18,2012, Busan, South Korea.[PDF]
  • Z. Huo, X.Meng, H.Hu, Y.Huang: You Can Walk Alone: Trajectory Privacy-preserving through Stay Points Protection. In Proceedings of the 17th International Conference on Database Systems for Advanced Applications (DASFAA2012) : pages 351-366, April 15-18,2012,Busan, South Korea.[PDF]
  • J.Zhang, X.Meng ,X.Zhou, D.Liu: Co-Spatial Searcher: Efficient Tag-based Collaborative Spatial Search on Geo-Social Network. In Proceedings of the 17th International Conference on Database Systems for Advanced Applications (DASFAA2012): pages 560-575, April 15-18, 2012, Busan, South Korea.[PDF]
  • X. Pan, J. Xu, X. Meng: Protecting Location Privacy Against Location-dependent Attacks in Mobile Services. IEEE Transaction on Knowledge and Data Engineering (TKDE).24(8):1506-1519,2012 .(Regular paper).[PDF]
  • R. Ma, X. Meng, Z. Wang: Preserving Privacy on the Searchable Internet. In Proceedings of the 13th International Conference on Information Integration and Web-based Applications & Services (iiWAS2011): pages 238-245, December 5-7, 2011, Ho Chi Minh City, Vietnam.
  • C. Zhou, X. Meng, D. Liu: Spatio-Temporal Sequence Searching in Flickr(Demonstration). In Proceedings of the 34th Annual ACM SIGIR Conference(SIGIR2011), pages 1265, July 24-28, 2011,Beijing,China.
  • C. Zhou, X. Meng: STS: Complex Spatio-Temporal Sequence Mining in Flickr. In Proceedings of the 16th International Conference on Database Systems for Advanced Applications(DASFAA2011), pages 22-25, April 2011,Hong Kong .(Full Paper).
  • C. Zhou, X. Meng: Out-of-Order Durable Event Processing in Integrated Wireless Networks. Journal of Pervasive and Mobile Computing (PMCJ2011),Vol.7(5):595-610,October 2011. (Regular paper).
  • X. Tang, X. Meng: ACR: an Adaptive Cost-Aware Buffer Replacement Algorithm for Flash Storage Devices. In Proceedings of the 11th International Conference on Mobile Data Management (MDM 2010), pages 33-42, May23-26, 2010, Kansas City, Missouri, USA. (Full paper)
  • D. Zhou, X. Meng: A Flash-aware Random Write Optimized Database (Demonstration). In Proceedings of the 11th International Conference on Mobile Data Management (MDM 2010), pages 276-278, May23-26, 2010, Kansas City, Missouri, USA.
  • C. Zhou, X. Meng: IO3: Interval-based Out-of-Order Event Processing in Pervasive Computing. In Proceedings of the 15th International Conference on Database Systems for Advanced Applications (DASFAA 2010), pages 261-268,April 1-4, 2010, Tsukuba, Japan.
  • W. Liu, X. Meng, and W. Meng: ViDE: A Vision-based Approach for Deep Web Data Extraction. IEEE Transactions on Knowledge and Data Engineering (TKDE), Vol.22(3):447-460, March 2010.
  • [more]