Quannan Li(李劝男)

About Me: 

I am now a software engineer at Twitter, Inc, working on recommendation system, personalization and big data analysis. I obtained my PhD degree in computer science department at UCLA in August, 2013 (from 2009 to 2013) under the supervision of Professor Zhuowen Tu. I am interested in big data analysis, recommendation system, machine learning, data mining and computer vision.
Contact Info: quannan.li@gmail.com;  Twitter Handle: @truthseeker1985

Publications [Google Scholar page]:
[1] Pankaj Gupta, Venu Satuluri, Ajeet Grewal, Siva Gurumurthy, Volodymyr Zhabiuk, Quannan Li, and Jimmy Lin. Real-Time Twitter Recommendation: Online Motif Detection in Large Dynamic Graphs. VLDB 2014, 2014

[2] Quannan Li, Jiajun Wu and Zhuowen Tu, "Harvesting Mid-level Visual Concepts from Large-scale Internet Images", CVPR 2013 [pdf] [project page]

[3] Quannan Li, Jingdong Wang, David Wipf and Zhuowen Tu, "Fixed-Point Model for Structured Labeling", ICML 2013 [code] [pdf]

[4] Quannan Li, Cong Yao, LiweiWang and Zhuowen Tu, "Randomness and Sparsity Induced Codebook Learning with Application to Cancer Image Classi.cation". Workshop of Medical Computer Vision at CVPR, 2012. [code] [pdf]

[5] Quannan Li, XinggangWang,WeiWang, Yuan Jiang, Zhi-Hua Zhou and Zhuowen Tu, "Disagreement-Based Multi-System Tracking". Workshop of Detection and Tracking in Challenging Environments, 2012 [pdf]

[6] Xiang Bai, Quannan Li, Tianyang Ma, Wenyu Liu, Longin Jan Latecki, "Binarization of Gray-level Images Based on Skeleton Region Growing", Digital Geometry Algorithms, 2012 [pdf]

[7] Yi Hong, Quannan Li, Jiayan Jiang and Zhuowen Tu. "Learning a Mixture of Sparse Distance Metrics for Classi.cation and Dimensionality Reduction". ICCV 2011 [pdf]

[8] Yu Zheng, Yukun Chen, Quannan Li, Xing Xie and Wei-Ying Ma, "Understanding Transportation Modes Based on GPS Data for Web applications". ACM Transactions on the Web (TWEB) 4(1) (2010) [pdf]

[9] Xiang Bai, Quannan Li, Longin Jan Latecki, Wenyu Liu and Zhuowen Tu, "Shape Band: A Deformable Object Detection Approach". CVPR 2009 [pdf]

[10] Chengqian Wu, Xiang Bai, Quannan Li, Xingwei Yang, Wenyu Liu, Contour "Grouping with Partial Shape Grouping",  PSIVT 2009 [pdf]. 

[11] Quannan Li, Yu Zheng, Xing Xie, Yukun Chen, Wenyu Liu and Wei-Ying Ma, "Mining User Similarity Based on Location History". GIS 2008,[pdfThe mostly cited paper in GIS 2008

[12] Yu Zheng, Quannan Li, Yukun Chen, Xing Xie and Wei-Ying Ma, "Understanding Mobility Based on GPS Data". UbiComp 2008 [pdf]

[13] Quannan Li, Xiang Bai and Wenyu Liu, "Skeletonization of Gray-scale Image From Incomplete Boundaries". ICIP,2008 [pdf].

[14] Longin Jan Latecki, Quannan Li, Xiang Bai, Wenyu Liu, "Skeletonization using SSM of the distance transform", ICIP 2007 [pdf].

China Patent 
   Wenyu Liu, Xiang Bai, Quannan Li, Hairong Liu, "Skeleton Pruning by Discrete Curve Evolution" (No. 200710053534)

    Member of Technical Program Committee: ICIP 2014
    Journal paper reviewers for: IEEE Multimedia, Pattern Recognition, Computers & Graphics, Pattern Recognition Letters, ISPRS Journal of Photogrammetry and Remote Sensing.
    Conference paper reviewers for: CVPR 2014, CVPR 2015, WACV 2014, WACV 2015, SSIAI 2014