Lei Zhang (张镭)


Department of Computer Science
University of Illinois at Chicago ( UIC )

Email: lzhang32 AT gmail DOT com 

About Me

I have received Ph.D. degree in Computer Science from UIC. My advisor is Prof. Bing Liu. I received my Master and Bacholer's degree in Computer Science from Wuhan University, China.

Research Interests

My research interests include Opinion Mining / Sentiment Analysis, Text Mining, Data Mining and Machine Learning.


  • Ruoying Wang, Lei Zhang, Yang Yang, Yi Zhen, Bo Long, Tie Wang, Vinoth Govindaraj,Todd Palino, Samir Tata, Viji Nair. "CapPredictor: A Capacity Headroom Prediction Framework in Cloud", Workshop on Cloud IntelligenceIn Proceeding of the 34th AAAI Conference on Artificial Intenlligence, (AAAI 2020 )
  • Yi Zhen, Yung-Yu Chung, Yang Yang, Lei Zhang, Ruoying Wang, Bo Long, Tie Wang, Pranay Kanwar, Dong Wang, Mike Snow, Sanket Patel, Stephen Bisordi, Viji Nair. "HotspotRank: Hotspot Detection in Large-Scale Microservice Architecture", Workshop on Cloud IntelligenceIn Proceeding of the 34th AAAI Conference on Artificial Intenlligence, (AAAI 2020)
  • Lei Zhang, Shuai Wang, Bing Liu "Deep Learning for Sentiment Analysis: A Survey", Wiley Interdisciplinary Reviews: Data Mining and Knowledge Discovery, 2018 (Among top cited articles of the journal, 2018-2019
  • Lei Zhang, Bing Liu  "Aspect Extraction for Sentiment Analysis in Social Media", book chapter in Encyclopedia of Social Network Analysis and Mining, Springer, 2016
  • Lei Zhang, Bing Liu. "Sentiment Analysis and Opinion Mining", book chapter in Encyclopedia of Machine Learning and Data Mining, Springer, 2015
  • Lei Zhang, Bing Liu. "Aspect and Entity Extraction for Opinion Mining", book chapter in Data Mining and Knowledge Discovery for Big Data: Methodologies, Challenges, and Opportunities, Springer, 2014 [pdf]  
  • Lifeng Jia, Clement Yu, Weiyi Meng and Lei Zhang. Facet-Driven Blog Feed Retrieval. In Proceeding of the 14th International Conference on Intelligent Text Processing and Computational Linguistics (CICLing 2013)
  • Bing Liu, Lei Zhang.   "A  Survey of Opinion Mining and Sentiment Analysis". book chapter in Mining Text Data,  Kluwer Academic Publishers 2012 [pdf]
  • Lei Zhang, Bing Liu. "Extracting Resource Terms for Sentiment Analysis". In Proceeding of the 5th International Joint Conference on Natural Language Processing (IJCNLP 2011) [pdf]
  • Lei Zhang, Bing Liu. "Identifying Noun Product Features that Imply Opinions". In Proceeding of the 49th Annual Meeting of the Association for Computational Linguistics (ACL 2011) [poster][pdf]
  • Zhongwu Zhai, Bing Liu, Lei Zhang, Hua Xu, Peifa Jia.  "Identifying Evaluative Sentences in Online Discussions" In Proceedings of 25th Conference on Artificial Intelligence (AAAI 2011)
  • Malu Castellanos, Umeshwar Dayal, Meichun Hsu, Riddhiman Ghosh, Mohamed Dekhil, Yue Lu, Lei Zhang, Mark Schreiman. "LCI : A Social Channel Analysis Platform for Live Customer Intelligence" In Proceedings of the 2011 ACM SIGMOD/PODS Conference (SIGMOD 2011)
  • Lei Zhang, Riddhiman Ghosh, Mohamed Dekhil, Meichun Hsu, Bing Liu. "Combining Lexicon-based and Learning-based Methods for Twitter Sentiment Analysis".  Technical Report, HP Labs.[pdf]  
  • Lei Zhang, Bing Liu. "Entity Set Expansion in Opinion Documents".In Proceedings of the 22nd ACM Conference on Hypertext and Hypermedia(HT 2011) [ppt][pdf][demo][data]
  • Malu Castellanos, Riddhiman Ghosh, Yue Lu, Lei Zhang, Perla Ruiz, Mohamed Dekhil, Umeshwar Dayal,Meichun Hsu.  "LivePulse: Tapping Social Media for Sentiments in Real-Time", In Proceedings of the 20th World Wide Web Conference (WWW 2011) [system demo]
  • Lei Zhang, Bing Liu, Suk Hwan Lim, Eamonn O'Brien-Strain. "Extracting and Ranking Product Features in Opinion Documents", In Proceedings of the 23rd International Conference on Computational Linguistics (COLING 2010) [poster] [pdf] [demo]
  • Xiaoli Li, Lei Zhang, Bing Liu, See-Kiong Ng. "Distributional Similarity vs. PU Learning for Entity Set Expansion", In Proceedings of the 48th Annual Meeting of the Association for Computational Linguistics (ACL 2010)
  • Xiaowen Ding, Bing Liu, Lei Zhang. "Entity Discovery and Assignment for Opinion Mining Applications",  In Proceedings of ACM SIGKDD International Conference on Knowledge Discovery and Data Mining (KDD 2009)
  • Lei Zhang, Bing Liu, Jeffrey Benkler, Chi Zhou. "Finding Actionable Knowledge via Automated Comparison", In Proceedings of the 25th International Conference on Data Engineering (ICDE 2009) [ppt][pdf][similar open source application]

Teaching Experience

  • Teaching Assistant ,     Department of Computer Science of UIC, U.S.       August 2006 - May 2007
  • Teaching Assistant ,     Computer School, Wuhan University, China            September 2004 - December 2004
  • Teacher,       Hubei Communications Technical College, China                      March 2004 - July 2004

Working Experience

  • Engineering Manager ,  Linkedin. Mountain View, CA, U.S.  September 2015 - Present
  • Computer Scientist ,  Adobe. San Jose, CA, U.S.  December 2012 -  September 2015
  • Machine Learning Specialist and Software Development Manager ,  E-Commerce,  Sears Holdings Corporation.  Hoffman Estates, IL, U.S.  May 2011 -  December 2012 
  • Research Associate ,    Intelligent Information Management Lab at HP Labs, Palo Alto, CA,  U.S.   May - August  2010
  • Graduate Research Assistant ,    Motorola Labs, Schaumburg, IL, U.S.  May - August 2009
  • Graduate Research Assistant ,   Motorola Labs, Schaumburg, IL, U.S.  May - August 2007
  • Software Engineer,  WHU Firstlink Digital Technology Co., Ltd, Wuhan, Hubei, China.  July 2005 - June 2006                 


  • "Artifical Intelligence in Internet Company"  Panel talk given at CTrip Meetup Silicon Valley,  San Jose, June 23, 2019   
  • "An Introduction to Use Cases of Predicative Modelling at LinkedIn"  Talk given at ArchSummit 2018 Beijing.  December 7, 2018
  • "Bussiness Analytics at LinkedIn"   Talk given at Department of EECS, Colorado School of Mine.  April 21, 2016
  • "Multilingual Sentiment Analysis for Social Media : Technologies and ChallengesTalk given at San Francisco Globalization Meetup. July 13, 2015  
  • "Text Analytics for Dig Data"  Talk given at Big Data Forum, iheima.com. March 28, 2015  
  • "Social Media Analytics: Harness Bussiness Intelligence from Big Data"  Talk given at Big Data Forum, Analysys International. Feburary 15, 2015  
  • "NLP in the Era of Big Data: a Practioner's Perspective"     Talk given at Multimedia Communication Center, Wuhan University. Janurary 6, 2015   
  • "Aspect and Entity Extraction from Opinion Documents"    Ph.D. defense presentation. University of Illinois at Chicago.   March 28, 2012  
  • "Opinion Mining : A Multifaceted Problem"     Talk given at Machine Learning Group, Online Bussiness Unit,  Sears Holdings Corporation.  Feburary 16, 2011        

Professional Services

    Invited Reviewer


    Program Committee Member


    Patent Review Committee Member at Adobe ,   2015           



My Deployed Softwares

  • WZL-1   an image processing software used in radiographic welding seam inspection system. It was deployed in Wuhan Boiler Company, China. 2004. (core contributor)
  • Firstlink secure videoconferencing system   a secure videoconferencing system basd on H.235 protocol. It was developed in Firstlink Digital Technology Co., Ltd, China, 2006. (main contributor) 
  • Opportunity Map  a data mining software used for analyzing large data sets. It was deployed in Motorola Labs, U.S.  2008. (core contributor)
  • Compare Search  a development and test platform for product search relevancy algorithms. It was deployed in Sears Holdings, 2012. (core contributor) 
  • Sammy   a sentiment analysis system for social media data. It is deployed in Adobe, 2013. (core contributor)        
  • Photon Gateway a propensity modelling platform. It is deployed in LinkedIn, 2020. (core contributor)     

My Patents


My Research Programs and  Resources

  • Entity Finder   a program used to find product entities from product reviews.
  • Feature Finder   a program used to find product features/aspects from product reviews.
  • Opinion Lexicon    a list of opinion-bearing words (adjectives, adverbs , nouns, verbs and phrases) used for opinion mining and sentiment analysis   

Recent Awards

  • Sears Holdings Innovation Project Reward, 2012 
  • SIGWEB Travel Award, 2011
  •  Presenter's Travel Award, University of Illinois at Chicago  2010, 2011
  •  Graduate Student Council Award, University of Illinois at Chicago  2010, 2011 


Chinese Zodiac (生肖)    The pictures are drawn by my father.

    Mouse (鼠)                     OX (牛)                          Tiger (虎)                         Rabbit(兔)

My son :-)  


Useful Websites  

  • Booked    a hotel online reservation service. It contains many valuable customer reviews for hotels.  
  • Sentiment32 :  an accurate and free sentiment analysis web service online.

 Created : September 9, 2010 ;  Last Updated: October 31 , 2021

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