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Short Biography 		Chang Lei (常雷)

Research Scientist
EMC Research China
EMC Corporation

Ph.D. (2008) Computer Science, Peking University



Phone +86 (0)10 8215 8517
Fax: +86 (0)10 8215 8805
Email:
chang_lei AT emc DOT com
chang.lei.cn AT gmail DOT com


Research Interests


My research interests include data mining, information retrieval, cloud computing and data warehousing. More specifically,

  • Data mining over structured and unstructured data : includes information extraction, classification, clustering, opinion data analysis, document layout analysis, frequent pattern mining, stream data mining and Web data mining;
  • Information retrieval with an emphasis on enterprise search : includes information retrival models, query classification, interactive search, intelligent enterprise search such as enterprise entity search;
  • Cloud computing : includes software as a service, enterprise information access and mining on cloud platforms;
  • OLAP and data warehousing: includes data cube computation, metadata management and data quality management.


    • Cureent Research Projects



    Selected Publications


    • Lei Chang, Dongqing Yang, Tengjiao Wang, Hua Luan, Shiwei Tang. Efficient algorithms for incremental maintenance of closed sequential patterns in large databases. Data & Knowledge Engineering. 2009

    • Tianyuan Chen, Lei Chang et al. HOCT: A Highly Scalable Algorithm for Training Linear CRF on Modern Hardware. Workshop on Large-scale Data Mining: Theory and Applications. ICDM 2009

    • Zhang Wei, Lei Chang et al. Aggregate Models for People Finding in Enterprise Corpora. The 3rd International conference on knowledge science, engineering and management.

    • Lei Chang, Tengjiao Wang, Dongqing Yang, Hua Luan. SeqStream: Mining closed sequential patterns over stream sliding windows. In Proceeding of 2008 IEEE International Conference on Data Mining (ICDM'08), (full paper), Pisa, Italy, Dec. 2008. (Acceptance rate: 70/724 = 9.7%). PDF

    • Lei Chang, Dongqing Yang, Tengjiao Wang, Shiwei Tang. An Effective Algorithm for Mining Compressed Sequential Patterns. Journal of Frontiers of Computer Science and Technology. 2008, 2(1).

    • Bishan Yang, Tengjiao Wang, Dongqing Yang, Lei Chang. BOAI: Fast Alternating Decision Tree Induction based on Bottom-up Evaluation. In Proceeding of the Pacific-Asia Conference on Knowledge Discovery and Data Mining. (PAKDD), 2008

    • Bishan Yang, Tengjiao Wang, Lei Chang, Dongqing Yang. BICA: A Fast and Scalable ADTree Constructing Algorithm. Journal of Computer Research and Development. 2007.

    • Lei Chang, Dongqing Yang, Tengjiao Wang, Shiwei Tang. IMCS: Incremental Mining of Closed Sequential Patterns . In Proceeding of the Joint Conference of the 9th Asia-Pacific Web Conference and the 8th International Conference on Web-Age Information Management. LNCS, Springer-Verlag (APWeb/WAIM), 2007. (Runner up of Best Student Paper Award)

    • Lei Chang, Dongqing Yang, Shiwei Tang, Tengjiao Wang. Mining Compressed Sequential Patterns. In Proceeding of the International Conference on Advanced Data Mining and Applications. LNAI, Springer-Verlag, 2006.

    • Lei Chang, Shaojun Yang. Workflow-based Large-scale Integration Hospital System. In Proceeding of the 8th International Conference on CSCW in Design (CSCWD), 2004.


    Honors and Awards


    • Samsung Scholarship from Peking University.

    • PKU Tianwang - Sohu R&D Scholarship from Peking University;

    • Runner-up of Best Student Paper Award for APWeb/WAIM 2007


    Useful Links


    Upcoming Conferences

    Attachments Attachments
    Topic attachments
    I Attachment Action Size Date Who Comment
    jpgjpg clo1.jpg manage 380.6 K 29 Sep 2008 - 22:30 ChangLei  
    pdfpdf seqstream.pdf manage 317.1 K 16 Nov 2009 - 09:06 LeiCh seqstream
    pngpng tumbic4.png manage 7.4 K 12 Oct 2008 - 10:42 ChangLei tumbic.png
    pngpng wump6.png manage 9.5 K 12 Oct 2008 - 10:47 ChangLei  
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