Yi Chang  (Ph.D.)

yichang (at) yahoo-inc.com;

yichang (at) ieee.org; yichang (at) acm.org;                                                                  
     


About Me

I joined Yahoo in 2006. Currently I am a research director of Yahoo Research at Sunnyvale, where I am leading the search science group with

more than twenty research scientists. My Research Interests include information retrieval, data mining, applied machine learning, and natural language processing.


What's New

1. WSDM 2018 will be held in Los Angeles, USA, in February 2018. Prof. Chengxiang Zhai (UIUC) and I will chair this conference.

2. Our paper, "Ranking Relevance in Yahoo Search", won Best Paper Award (Applied Data Science Track) on KDD 2016!

3. Our paper, "Beyond Ranking: Optimizing Whole-Page Presentation", won Best Paper Award on WSDM 2016!

4. CIKM 2016 Industry Track Call for 10-page long papers and 4-page short papers. Submission deadline: May 30, 2016

5. ACM Transactions on Information Systems (TOIS)
Call for submissions to a Special Issue on Search, Mining and their Applications on Mobile Devices, Submission deadline: June 24, 2016


Recent Professional Activities


Book

  1. Bo Long, Yi Chang (Ed.) ¡°Relevance Ranking for Vertical Search Engines¡±, Morgan Kaufmann, 2014. (The first book on the field of vertical search)


Book Chapters

  1. Hongbo Deng, Yizhou Sun, Yi Chang, and Jiawei Han, ¡°Probabilistic Models for Classification¡±, Data Classification: Algorithms and Applications (Charu C. Aggarwal Ed.), CRC Press, 2014.

  2. Datong Chen, Yi Chang, Rong Yan, Jie Yang, ¡°Protecting Personal Identification in Video¡±, Protecting Privacy in Video Surveillance (Senior, Andrew Ed.), Springer 2009.


Selected Journal Publications

  1. Yi Chang, Makoto Yamada, Antonio Ortega, Yan Liu, "Life Cycle Modeling for Buzz Temporal Pattern Discovery", accepted by ACM Transactions on Knowledge Discovery from Data (TKDD).

  2. Jiliang Tang, Yi Chang, Charu Aggarwal, Huan Liu, "A Survey of Signed Network Mining in Social Media", accepted by ACM Computing Surveys. (pdf)

  3. Makoto Yamada, Leonid Sigal, Michalis Raptis, Machiko Toyoda, Yi Chang, Masashi Sugiyama, ¡°Cross-Domain Matching with Squared-Loss Mutual Information¡±, IEEE Transactions on Pattern Analysis and Machine Intelligence (PAMI), Vol. 37(9), 2015. (pdf)

  4. Bo Long, Jiang Bian, Olivier Chapelle, Ya Zhang, Yoshiyuki Inagaki, Yi Chang, ¡°Active Learning for Ranking through Expected Loss Optimization¡±, IEEE Transactions on Knowledge and Data Engineering (TKDE), Vol. 27(5), 2015. (pdf)

  5. Changsung Kang, Dawei Yin, Ruiqiang Zhang, Jianzhang He, Yi Chang, ¡°Ranking Related Entities for Web Search Queries¡±, Neurocomputing, Vol 166, 2015. (pdf)

  6. Changsung Kang, Roi Blanco, Jay Lee, Yi Chang, ¡°Predicting Primary Categories of Business Listings for Local Search Ranking Neurocomputing¡±, Neurocomputing, Vol 168, 2015.

  7. Yi Chang, Lei Tang, Yoshiyuki Inagaki, Yan Liu, "What is Tumblr: A Statistical Overview and Comparison", SIGKDD Explorations, Vol. 16(1), 2014. (pdf)

  8. Jiang Bian, Bo Long, Lihong Li, Taesup Moon, Anlei Dong, Yi Chang, ¡°Exploiting User Preference for Online Learning in Web Content Optimization Systems¡±, ACM Transactions on Intelligent Systems and Technology (ACM TIST), Vol. 5(2), 2014. (pdf)

  9. Makoto Yamada, Leonid Sigal, Yi Chang, ¡°Domain Adaptation for Structured Regression¡±, International Journal of Computer Vision (IJCV), Vol. 109(1-2), 2014.

  10. Ke Zhou, Hongyuan Zha, Yi Chang, Gui-Rong Xue, ¡°Learning the Gain Values and Discount Factors of Discounted Cumulative Gains¡±, IEEE Transactions on Knowledge and Data Engineering (TKDE), Vol. 26(2), 2014. (pdf)

  11. M. T. Bahadori, Y. Chang, B. Long, and Y. Liu, "Scalable Heterogeneous Transfer Ranking ," Journal of Machine Learning Research (JMLR) - Proceedings Track 36: 214-228, 2014. (pdf)

  12. Jiliang Tang, Yi Chang, Huan Liu, ¡°Mining Social Media with Social Theories: A Survey¡±, SIGKDD Explorations, Vol. 15(2), 2013. (pdf)

  13. Jiang Bian, Anlei Dong, Xiaofeng He, Srihari Reddy, Yi Chang, ¡°User Action Interpretation for Online Content Optimization¡±, IEEE Transactions on Knowledge and Data Engineering (TKDE), vol. 9, 2013. (pdf)

  14. Yi Chang, Anlei Dong, Pranam Kolari, Ruiqiang Zhang, Yoshiyuki Inagaki, Fernando Diaz,  Hongyuan zha, Yan Liu, ¡°Improving Recency Ranking Using Twitter Data¡±, ACM Transactions on Intelligent Systems and Technology (ACM TIST), vol. 4, No. 1, 2013. (pdf)

  15. Jiang Bian, Yi Chang, ¡°Learning to Blend Vitality Rankings from Heterogeneous Social Networks¡±, Neurocomputing, vol 97, 390-397, 2012. (pdf)

  16. Taesup Moon, Lihong Li, Wei Chu, Yi Chang, Zhaohui Zheng, ¡°An Online Learning Framework for Refining Recency Search Results with User Click Feedback¡±, ACM Transactions on Information Systems (TOIS), vol. 30, 2012. (pdf)

  17. Yi Chang, Jing Bai, Ke Zhou, Gui-Rong Xue, Hongyuan Zha, Zhaohui Zheng, ¡°Multi-Task Learning to Rank for Web Search¡±, Pattern Recognition Letters, Vol. 33, 173-181, 2012. (pdf)

  18. Olivier Chapelle, Yi Chang, Tie-Yan Liu, ¡°Future directions in learning to rank¡±, Journal of Machine Learning Research (JMLR) - Proceedings Track 14: 91-100, 2011. (pdf)

  19. Olivier Chapelle, Yi Chang, ¡°Yahoo! Learning to Rank Challenge Overview¡±, Journal of Machine Learning Research (JMLR) - Proceedings Track 14: 1-24, 2011. (pdf)

  20. Yi Chang, Datong Chen, Ying Zhang, Jie Yang, ¡°An Image-based Automatic Arabic Translation System¡±, Pattern Recognition 42(9): 2127-2134, 2009.

  21. Datong Chen, Yi Chang, Rong Yan, Jie Yang, "Tools for Protecting The Privacy of Specific Individuals in Video", in EURASIP Journal on Applied Signal Processing, Special Issue on ¡°Signal Processing Technologies for Ambient Intelligence in Home-Care Applications¡±, 2007.


Selected Conference Publications

  1. Dawei Yin, Yuening Hu, Jiliang Tang, Tim Daly, Mianwei Zhou, Hua Ouyang, Jianhui Chen, Changsung Kang, Hongbo Deng, Chikashi Nobata, Jean-Marc Langlois, Yi Chang, ¡°Ranking Relevance in Yahoo Search¡±, Proceedings of the 22nd ACM SIGKDD Conference on Knowledge Discovery and Data Mining (KDD), 2016. (pdf) (Best Paper Award)

  2. Shiyu Chang, Yang Zhang, Jiliang Tang, Dawei Yin, Yi Chang, Mark Hasegawa-Johnson, Thomas S. Huang, ¡°Positive Unlabeled Learning in Streaming Networks¡±, Proceedings of the 22nd ACM SIGKDD Conference on Knowledge Discovery and Data Mining (KDD), 2016. (pdf)

  3. Yue Wang, Dawei Yin, Roger Luo, Pengyuan Wang, Makoto Yamada, Yi Chang, Qiaozhu Mei, ¡°Beyond Ranking: Optimizing Whole-Page Presentation¡±, Proceedings of International conference on Web Search and Data Mining (WSDM), 2016. (pdf) (Best Paper Award)

  4. Xiaolong Wang, Jingjing Wang, Jie Luo, Yi Chang, and Chengxiang Zhai, "Binding Pairwise Preferences of the Crowd into Rankings: A Thurstonian Approach", Proceedings of IEEE International Conference on Data Mining (ICDM), 2016.

  5. Yunlong He, Jiliang Tang, Hua Ouyang, Changsung Kang, Dawei Yin, Yi Chang, ¡°Learning to rewrite queries¡±, Proceedings of the 25th ACM Conference on Information and Knowledge Management (CIKM), 2016.

  6. Jianhui Chen, Tianbao Yang, Lijun Zhang, Qihang Lin, Yi Chang, ¡°Optimal Stochastic Strongly Convex Optimization with a Logarithmic Number of Projections¡±, Proceedings of the 32nd Conference on Uncertainty in Artificial Intelligence (UAI), 2016. (pdf)

  7. Jingjing Wang, Changsung Kang, Yi Chang, Jiawei Han, ¡°Learning Hostname Preference to Enhance Search Relevance¡±, Proceedings of the 25th International Joint Conference on Artificial Intelligence (IJCAI), 2016. (pdf)

  8. Yi Chang, Jiliang Tang, Dawei Yin, Makoto Yamada, Yan Liu, ¡°Timeline Summarization from Social Media with Life Cycle Models¡±, Proceedings of the 25th International Joint Conference on Artificial Intelligence (IJCAI), 2016. (pdf)

  9. Neil O'Hare, Paloma De Juan, Rossano Schifanella, Yunlong He, Dawei Yin, Yi Chang, "Leveraging User Interaction Signals for Web Image Search", Proceedings of the 39th Annual ACM SIGIR Conference (SIGIR), 2016. (pdf)

  10. Shan Jiang, Yuening Hu, Changsung Kang, Tim Daly, Dawei Yin, Yi Chang, "Learning Query and Document Relevance from Web-scale Click Graph", Proceedings of the 39th Annual ACM SIGIR Conference (SIGIR), 2016. (pdf)

  11. Liangda Li, Hongbo Deng, Yunlong He, Anlei Dong, Yi Chang, Hongyuan Zha, ¡°Behavior Driven Topic Transition for Search Task Identification¡±, Proceedings of the 25th International World Wide Web Conference (WWW), 2016. (pdf)

  12. Aston Zhang, Amit Goyal, Ricardo Baeza-Yates, Yi Chang, Jiawei Han, Carl A. Gunter, Hongbo Deng, ¡°Towards Mobile Query Auto-Completion: A Mobile Application-Aware Approach¡±, Proceedings of the 25th International World Wide Web Conference (WWW), 2016. (pdf)

  13. Chikashi Nobata, Joel Tetreault, Achint Thomas, Yashar Mehdad, Yi Chang, ¡°Abusive Language Detection in User Content¡±, Proceedings of the 25th International World Wide Web Conference (WWW), 2016. (pdf)

  14. Jiliang Tang, SuhangWang, Xia Hu, Dawei Yin, Yingzhou Bi, Yi Chang, Huan Liu, "Recommendation with Social Dimensions", Proceedings of the 30th AAAI Conference on Artificial Intelligence (AAAI), 2016. (pdf)

  15. Jingyuan Zhang, Jie Luo, Altaf Rahman, Sihong Xie, Yi Chang, Philip S. Yu, ¡°Learning Entity Types from Query Logs via Graph-Based Modeling¡±, Proceedings of the 24th ACM Conference on Information and Knowledge Management (CIKM), 2015. (pdf)

  16. Aston Zhang, Amit Goyal, Weize Kong, Hongbo Deng, Anlei Dong, Yi Chang, Carl A. Gunter, Jiawei Han, ¡°adaQAC: Adapting Query Auto-Completion to Implicit Negative Feedback¡±, Proceedings of the 38th Annual ACM SIGIR Conference (SIGIR), 2015. (pdf)

  17. Weize Kong, Rui Li, Jie Luo, Aston Zhang, Yi Chang, James Allan, ¡°Predicting Search Intent Based on Pre-search Context¡±, Proceedings of the 38th Annual ACM SIGIR Conference (SIGIR), 2015. (pdf)

  18. Liangda Li, Hongbo Deng, Anlei Dong, Yi Chang, Hongyuan Zha, Ricardo Baeza-Yates, ¡°Analyzing User¡¯s Sequential Behavior in Query Auto-Completion via Markov Processes¡±, Proceedings of the 38th Annual ACM SIGIR Conference (SIGIR), 2015. (pdf)

  19. Suriya Gunasekar, Makoto Yamada, Dawei Yin, Yi Chang, ¡°Consistent Collective Matrix Completion under Joint Low Rank Structure¡±, Proceedings of 17th International Conference on Artificial Intelligence and Statistics (AISTATS), 2015. (pdf)

  20. Jiliang Tang, Chikashi Nobata, Anlei Dong, Yi Chang, Huan Liu, ¡°Propagation-based Sentiment Analysis for Microblogging Data¡±, Proceedings of SIAM International Conference on Data Mining (SDM), 2015. (pdf)

  21. Wei Sun, Pengyuan Wang, Dawei Yin, Jian Yang, Yi Chang, ¡°Causal Inference via Sparse Additive Models with Application to Online Advertising¡±, Proceedings of the 29th AAAI Conference on Artificial Intelligence (AAAI), 2015. (pdf)

  22. Pengyuan Wang, Wei Sun, Dawei Yin, Jian Yang, Yi Chang, ¡°Robust Tree-based Causal Inference for Complex Ad Effectiveness Analysis¡±, Proceedings of International conference on Web Search and Data Mining (WSDM), 2015. (pdf)

  23. Pengyuan Wang, Dawei Yin, Jian Yang, Yi Chang, ¡°Rethink Targeting: Detect `Smart Cheating' in Online Advertising through Causal Inference¡±, Proceedings of the 24th International World Wide Web Conference (WWW), 2015. (short) (pdf)

  24. Liangda Li, Hongbo Deng, Anlei Dong, Yi Chang and Hongyuan Zha, ¡°Identifying and Labeling Search Tasks via Query-based Hawkes Processes¡±, Proceedings of the 20th ACM SIGKDD Conference on Knowledge Discovery and Data Mining (KDD), 2014. (pdf)

  25. Jiliang Tang, Xia Hu, Yi Chang, and Huan Liu, ¡°Predictability of Distrust with Interaction Data¡±, Proceedings of the 23th ACM Conference on Information and Knowledge Management (CIKM), 2014. (pdf)

  26. Jingyuan Zhang, Xiangnan Kong, Jie Luo, Yi Chang, and Philip S. Yu, ¡°NCR: A Scalable Network-Based Approach to Co-Ranking in Question-and-Answer Sites¡±, Proceedings of the 23th ACM Conference on Information and Knowledge Management (CIKM), 2014. (pdf)

  27. Yanen Li, Anlei Dong, Hongning Wang, Hongbo Deng, Yi Chang and ChengXiang Zhai, ¡°A Two-Dimensional Click Model for Query Auto-Completion¡±, Proceedings of the 37th Annual ACM SIGIR Conference (SIGIR), 2014. (pdf)

  28. Jingjing Wang, Changsung Kang, Yi Chang, Jiawei Han, ¡°A Hierarchical Dirichlet Model for Taxonomy Expansion for Search Engines¡±, Proceedings of the 23rd International World Wide Web Conference (WWW), 2014. (pdf)

  29. Hongning Wang, Chengxiang Zhai, Feng Liang, Anlei Dong, Yi Chang, ¡°User Modeling in Search Logs via A Nonparametric Bayesian Approach¡±, Proceedings of International conference on Web Search and Data Mining (WSDM), 2014. (pdf)

  30. Yi Chang, Makoto Yamada, Antonio Ortega, Yan Liu, "Ups and Downs in Buzzes: Life Cycle Modeling for Buzz Temporal Pattern Discovery", Proceedings of IEEE International Conference on Data Mining (ICDM), 2014. (short)

  31. Jie Luo, Sudarshan Lamkhede, Rochit Sapra, Evans Hsu, Helen Song, Yi Chang, ¡°A Unified Search Federation System Based on Online User Feedback¡±, Proceedings of the 19th ACM SIGKDD Conference on Knowledge Discovery and Data Mining (KDD), 2013. (pdf)

  32. Hongning Wang, Chengxiang Zhai, Anlei Dong, Yi Chang, ¡°Content-Aware Click Modeling¡±, Proceedings of the 22nd International World Wide Web Conference (WWW), 2013. (pdf)

  33. Yoshiyuki Inagaki, Yi Chang, Jiang Bian, ¡°An Effective General Framework for Localized Content Optimization¡±, Proceedings of the 22nd International World Wide Web Conference (WWW), 2013. (short) (pdf)

  34. Achint Thomas, Kunal Punera, Lyndon Kennedy, Belle Tseng, Yi Chang, ¡°Framework for Evaluation of Text Captchas¡±, Proceedings of the 22nd International World Wide Web Conference (WWW), 2013. (short) (pdf)

  35. Yi Chang, Xuanhui Wang, Qiaozhu Mei, Yan Liu, ¡°Towards Twitter Context Summarization with User Influence Models¡±, Proceedings of International conference on Web Search and Data Mining (WSDM), 2013. (pdf)

  36. Bo Long, Jiang Bian, Anlei Dong, Yi Chang, ¡°Enhancing Product Search by Best-Selling Prediction in E-Commerce¡±, Proceedings of the 21st ACM Conference on Information and Knowledge Management (CIKM), 2012. (short) (pdf)

  37. Changsung Kang, Jeehaeng Lee, Yi Chang, ¡°Predicting Primary Categories of Business Listings for Local Search¡±, Proceedings of the 21st ACM Conference on Information and Knowledge Management (CIKM), 2012. (short) (pdf)

  38. Shuang-Hong Yang, Hongyuan Zha, Yi Chang, Bo Long, Alex Smola, ¡°Friend or Frenemy? Predicting Signed Ties in Social Networks¡±, Proceedings of the 35th Annual ACM SIGIR Conference (SIGIR), 2012. (pdf)

  39. Zhiheng Huang, Yi Chang, Bo Long, Jean-Francois Crespo, Anlei Dong, Sathiya Keerthi and Su-Lin Wu, ¡°Iterative Viterbi A* Algorithm for K-Best Sequential Decoding¡±, Proceedings of the 50th Annual Meeting of the Association for Computational Linguistics (ACL), 2012. (pdf)

  40. Hongning Wang, Anlei Dong, Lihong Li, Yi Chang and Evgeniy Gabrilovich, ¡°Joint Relevance and Freshness Learning From Click-throughs for News Search¡±, Proceedings of the 21st International World Wide Web Conference (WWW), 2012. (pdf)

  41. Xuanhui Wang, Jiang Bian, Yi Chang and Belle Tseng, ¡°Model News Relatedness through User Comments¡±, Proceedings of the 21st International World Wide Web Conference (WWW), 2012. (short) (pdf)

  42. Bo Long, Yi Chang, Anlei Dong and Jianzhang He, ¡°Pairwise Cross-Domain Factor Model for Heterogeneous Transfer Ranking¡±, Proceedings of International conference on Web Search and Data Mining (WSDM), 2012. (pdf)

  43. Changsung Kang, Xuanhui Wang, Yi Chang, Belle Tseng, ¡°Learning to Rank with Multi-Aspect Relevance for Vertical Searches¡±, Proceedings of International conference on Web Search and Data Mining (WSDM), 2012. (pdf)

  44. Anlei Dong, Yi Chang, Srihari Reddy, Jiang Bian, Xiaofeng He, ¡°User Action Interpretation for Personalized Content Optimization in Recommender Systems¡±, Proceedings of the 20th ACM Conference on Information and Knowledge Management (CIKM), 2011. (short) (pdf)

  45. Jiang Bian, Yi Chang, ¡°A Taxonomy of Local Search: Semi-Supervised Query Classification Driven by Information Needs¡±, Proceedings of the 20th ACM Conference on Information and Knowledge Management (CIKM), 2011. (short) (pdf)

  46. Yi Chang, Ruiqiang Zhang, Srihari Reddy, Yan Liu, ¡°Detecting Multilingual and Multi-Regional Query Intent in Web Search¡±, Proceedings of the Special Track on AI & the Web (AIW) at the 25th AAAI Conference on Artificial Intelligence (AAAI), 2011. (pdf)

  47. Yuanhua Lv, Taesup Moon, Pranam Kolari, Zhaohui Zheng, Xuanhui Wang, Yi Chang, ¡°Learning to Model Relatedness for News Recommendation¡±, Proceedings of the 20th International World Wide Web Conference (WWW), 2011. (pdf)

  48. Changsung Kang, Srinivas Vadrevu, Ruiqiang Zhang, Roelof van Zwol, Lluis Garcia Pueyo, Nicolas Torzec, Jianzhang He, Yi Chang, ¡°Ranking Related Entities for Web Search Queries¡±, Proceedings of the 20th International World Wide Web Conference (WWW), 2011. (short) (pdf)

  49. Yoshiyuki Inagaki, Jiang Bian, Yi Chang, ¡°Enhancing Mobile Search Using Web Search Log Data¡±, Proceedings of the 34th Annual ACM SIGIR Conference (SIGIR), 2011. (short) (pdf)

  50. Changsung Kang, Xuanhui Wang, Belle Tseng, Yi Chang, Zhaohui Zheng, ¡°Learning to Re-rank Web Search Results with Multiple Pairwise Features¡±, Proceedings of International conference on Web Search and Data Mining (WSDM), 2011. (pdf)

  51. Srinivas Vadrevu, Choon Hui Teo, Suju Rajan, Kunal Punera, Byron Dom, Alexander Smola, Yi Chang, Zhaohui Zheng, ¡°Scalable Clustering of News Search Results¡±, Proceedings of International conference on Web Search and Data Mining (WSDM), 2011. (pdf)

  52. Ruiqiang Zhang, Yuki Konda, Anlei Dong, Pranam Kolari, Yi Chang, Zhaohui Zheng, ¡°Learning Recurrent Event Queries for Web Search¡±, Proceedings of 2010 Conference on Empirical Methods on Natural Language Processing (EMNLP), 2010. (pdf)

  53. Alexander Kotov, Yi Chang, Pranam Kolari, Lei Duan, "Temporal Query Log Profiling to Improve Web Search Ranking", Proceedings of the 19th ACM Conference on Information and Knowledge Management (CIKM), 2010. (pdf)

  54. Bo Long, Zhaohui Zheng, Yi Chang, Shuang-Hong Yang, "Ranking with Auxiliary Data", Proceedings of the 19th ACM Conference on Information and Knowledge Management (CIKM), 2010. (short) (pdf)

  55. Zhenzhen Kou, Zhaohui Zheng, Yi Chang, Hongyuan Zha, "Learning to Blend Rankings: a monotonic transformation to blend rankings from multiple domains", Proceedings of the 19th ACM Conference on Information and Knowledge Management (CIKM), 2010. (short) (pdf)

  56. Taesup Moon, Zhaohui Zheng, Yi Chang, Ciya Liao, Lihong Li, Wei Chu, " Online learning for recency search ranking using real-time user feedback", Proceedings of the 19th ACM Conference on Information and Knowledge Management (CIKM), 2010. (short) (pdf)

  57. Jing Bai, Fernando Diaz, Yi Chang, Zhaohui Zheng, ¡°Cross-Market Model Adaptation with Pairwise Preference Data for Web Search Ranking¡±, Proceedings of the 23rd International Conference on Computational Linguistics (COLING), 2010. (pdf)

  58. Yoshiyuki Inagaki, Narayanan Sadagopan, Georges Dupret, Ciya Liao, Yi Chang, Anlei Dong, Zhaohui Zheng, ¡°Session Based Click Features for Recency Ranking¡±, Proceedings of the Special Track on AI & the Web (AIW) at the 24th AAAI Conference on Artificial Intelligence (AAAI), 2010. (pdf)

  59. Bo Long, Olivier Chapelle, Zhaohui Zheng, Ya Zhang, Belle Tseng, Yi Chang, ¡°Active Learning for Ranking through Expected Loss Optimization¡±, Proceedings of the 33rd Annual ACM SIGIR Conference (SIGIR), 2010. (pdf)

  60. Anlei Dong, Ruiqiang Zhang, Pranam Kolari, Jing Bai, Fernando Diaz, Yi Chang, Hongyuan Zha, Zhaohui Zheng, ¡°Use Twitter Data for Recency Ranking Improvement in Web Search¡±, Proceedings of the 19th International World Wide Web Conference (WWW), 2010. (pdf)

  61. Anlei Dong, Yi Chang, Zhaohui Zheng, Gilad Mishne, Jing Bai, Karolina Buchner, Ruiqiang Zhang, Ciya Liao and Fernando Diaz, ¡°Towards Recency Ranking in Web Search¡±, Proceedings of International conference on Web Search and Data Mining (WSDM), 2010. (pdf)

  62. Taesup Moon, Alex Smola, Yi Chang and Zhaohui Zheng, ¡°IntervalRank - Isotonic Regression with Listwise and Pairwise Constraints¡±, Proceedings of International conference on Web Search and Data Mining (WSDM), 2010. (pdf)

  63. Yi Chang, Anlei Dong, Ciya Liao, Zhaohui Zheng, ¡°Enhancing Topical Ranking with Preferences from Click-Through Data¡±, Proceedings of the 32th Annual ACM SIGIR Conference (SIGIR), 2009. (short) (pdf)

  64. Mingrui Wu, Yi Chang, Zhaohui Zheng, Hongyuan Zha. ¡°Smoothing DCG for Learning to Rank: A Novel Approach Using Smoothed Hinge Functions¡±, Proceedings of the 18th ACM Conference on Information and Knowledge Management (CIKM), 2009. (short) (pdf)

  65. Xin Li, Fan Li, Shihao Ji, Zhaohui Zheng, Yi Chang, Anlei Dong. ¡°Incorporating Robustness into Web Ranking Function Selection¡±, Proceedings of the 18th ACM Conference on Information and Knowledge Management (CIKM), 2009. (short) (pdf)

  66. Jing Bai, Ke Zhou, Hongyuan Zha, Belle Tseng, Zhaohui Zheng, Yi Chang. ¡°Multi-Task Learning for Learning to Rank in Web Search¡±, Proceedings of the 18th ACM Conference on Information and Knowledge Management (CIKM), 2009. (short) (pdf)

  67. Anlei Dong, Yi Chang, Shihao Ji, Ciya Liao, Xin Li and Zhaohui Zheng, ¡°Empirical Exploitation of Click Data for Topical Ranking¡±, Proceedings of 2009 Conference on Empirical Methods on Natural Language Processing (EMNLP), 2009. (pdf)

  68. Ruiqiang zhang, Yi Chang, Zhaohui Zheng, Donald Metzler and Jian-yun Nie, "Search Engine Adaptation by Feedback Control Adjustment for Time-sensitive Query¡±, Proceedings of North American Chapter of the Association for Computational Linguistics - Human Language Technologies conference (NAACL-HLT), 2009. (short) (pdf)

  69. Jing Bai, Yi Chang, Zhaohui zheng, Gordon Sun, Hang Cui and Xin Li, ¡°Investigation of Partial Query Proximity in Web Search¡±. Proceedings of the 17th International World Wide Web Conference (WWW), 2008. (short) (pdf)

  70. Yi Chang, Ying Zhang, Jie Yang, ¡°Enhancing Image-based Arabic Document Translation Using a Noisy Channel Correction Model¡±. Proceedings of MT Summit XI (MT Summit), 2007. (pdf)

  71. Yi Chang, Rong Yan, Datong Chen, Jie Yang, "People Identification with Limited Labels in Privacy-Protected Video'', Proceedings of IEEE International Conference on Multimedia & Expo (ICME), 2006. (short) (pdf)

  72. Yi Chang, Hongbo Xu, Shuo Bai, ''A re-examination of IR techniques in QA system'', Proceedings of the 1st International Joint Conference of Natural Language Processing (IJCNLP), 2004. (pdf)

  73. Yi Chang, Hongbo Xu, Shuo Bai, ''TREC 2003 Question Answering Track at CAS-ICT'', Proceedings of the 12th Text Retrieval Conference Notebook (TREC), 2003. (pdf)


Patents

  1. ¡°Timeline Summarization with Life Cycle Models for Tumblr¡±, Yahoo! Inc. 2016.

  2. ¡°A unified framework for query rewriting through machine translation¡±, Yahoo! Inc. 2015.

  3. ¡°Web Page Location Prediction Through the Query-URL Click Graph¡±, Yahoo! Inc. 2015.

  4. ¡°A unified framework for location-sensitive ranking¡±, Yahoo! Inc. 2015.

  5. ¡°Streaming Recommender Systems¡±, Yahoo! Inc. 2015.

  6. ¡°AppAware: a Mobile Application-Aware Approach for Query Auto-Completion on the Go¡±, Yahoo! Inc. 2015.

  7. ¡°Improved unified framework for boosting image quality in image search¡±, Yahoo! Inc. 2015.

  8. ¡°reducing the embrassing results in web search¡±, Yahoo! Inc. 2015.

  9. ¡°Novel modalities for audio Captchas exploiting the Cocktail Party Effect¡±, Yahoo! Inc. 2015.

  10. ¡°Buzz Topic Transition on Social Media¡±, Yahoo! Inc. 2014.

  11. ¡°Measureing Complex Online Strategy Effectiveness¡±, Yahoo! Inc. 2014.

  12. ¡°Large-scale Anomaly Detection with Relative Density-Ratio Estimation¡±, Yahoo! Inc. 2014.

  13. ¡°Method and System for providing query suggestions including Entities¡±, Patent Application No. 14/265,900, Yahoo! Inc. 2014.

  14. ¡°Method and system for providing query suggestion based on user feedback¡±, Patent Application No. 14/546,635, Yahoo! Inc. 2014.

  15. ¡°System and Method for Large-Scale Multi-Label Learning using Incomplete Label Assignments¡±, Patent Application No. 14/543,133, Yahoo! Inc. 2014.

  16. ¡°Feature Selection for Large and High-dimensional Data¡±, Patent Application No. 14/516,471, Yahoo! Inc. 2014.

  17. ¡°Local Query Ranking for Search Assist Method and Apparatus¡±, Patent Application No. 14/453,915, Yahoo! Inc. 2014.

  18. ¡°Graphical Interface Presentation of Search Results¡±, Patent Application No. 14/497,591, Yahoo! Inc. 2014.

  19. ¡°Ranking Products Using Purchase Day Based Time Windows¡±, Patent Application No. 13/662,159, Patent Number 8,880,518, Yahoo! Inc. 2012.

  20. ¡°Automated Categorization of Products in a Merchant Catalog¡±, Patent Application No. 13/720,703, Yahoo! Inc. 2012.

  21. ¡°Method or system for content recommendations¡±, Patent Application No. 13/348,573, Yahoo! Inc. 2011.

  22. ¡°Method and System for Customizing a Web Site¡±, Patent Application No. 13/647,581, Patent Number 9,268,859, Yahoo! Inc. 2011.

  23. ¡°Related News Articles¡±, Patent Application No. 13/298,932, Patent number 8,713,028, Yahoo! Inc. 2011.

  24. ¡°Cross-Market Model Adaptation with Pairwise Preference Data¡±, Patent Application No. 12/966,983, Patent Number 8,489,590, Yahoo! Inc., 2010.

  25. ¡°Micro-Blog Message Filtering¡±, Patent Application No. 12/857,000, Yahoo! Inc., 2010.

  26. ¡°Clustering of search results¡±, Patent Application No. 12/835,954, Yahoo! Inc., 2010.

  27. ¡°Ranking of Search Result Based on Microblog data¡±, Patent Application No. 12/749,972, Patent Number 8,751,511, Yahoo! Inc., 2010.

  28. ¡°Session Based Click Features for Recency Ranking (I)¡±, Patent Application No. 12/725,310, Patent Number 8,255,390, Yahoo! Inc., 2010.

  29. ¡°Session Based Click Features for Recency Ranking (II)¡±, Patent Application No. 12/725,357, Patent Number 8,326,815, Yahoo! Inc., 2010.

  30. ¡°Global and topical ranking of search results using user clicks¡±, Patent Application No. 12/533,564, Yahoo! Inc., 2009.

  31. ¡°Incorporating Recency in Network Search Using Machine Learning¡±, Patent Application No. 12/579,855, Patent Number 8,886,641, Yahoo! Inc., 2009.

  32. ¡°Improved Search Ranking for Time Sensitive Query by Feedback Control¡±, Patent Application No. 12/576,534, Yahoo! Inc., 2009.


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