Welcome to my homepage! I am Kai Sun (孙锴), a Ph.D. student at Cornell University, studying Computer Science. My advisor is Claire Cardie. Before coming to Cornell, I did my undergraduate studies in Computer Science, in the ACM Honored Class 2011 at Shanghai Jiao Tong University.
I am interested in artificial intelligence (AI) related areas including speech and natural language processing, machine learning, and AI in games.
Belief and Sentiment Detection
Our team participated in the BeSt Evaluation at the 2016 and 2017 NIST TAC KBP. In 2016, we submitted systems for Chinese and English, and ranked the 1st in 6 of 8 Chinese tasks, and 2 of 8 English tasks. In 2017, we submitted systems for Chinese, and ranked the 1st in 7 of 8 Chinese tasks.
I'm a member of the TinkerBell team (Columbia+Cornell+JHU+RPI+Stanford+UIUC+Upenn), working on Chinese sentiment analysis for Cold-Start++ 2017.
AI in Board Games
I designed Yixin, a program playing Gomoku and Renju. It is the strongest Gomoku/Renju program in the world, the winner of the 13th, 14th, 15th, 16th, 17th, and 18th Gomocup, significantly outperforming the runner-up with a gap of about 400 Elo. In 2017, Yixin beat the Taiwan's Meijin title holder Lin Shu-Hsuan and the world Gomoku champion Rudolf Dupszki, making it the first Gomoku/Renju AI that outperformed top human players.
Our team participated in the 2nd DSTC (Dialog State Tracking Challenge) and ranked the 3rd; In the 3rd DSTC, our method was found to be one of the top three tracking methods (ranked 1st/2nd/3rd in "requested slots"/"method"/"joint goals" respectively), and was one of the only two methods that outperformed all four baselines of the challenge; In the 4th DSTC, our team ranked the 2nd.
Qizhe Xie, Kai Sun, Su Zhu, Lu Chen and Kai Yu. Recurrent Polynomial Network for Dialogue State Tracking with Mismatched Semantic Parsers. 16th Annual SIGdial Meeting on Discourse and Dialogue (SIGdial). 2015. pdf bib
Kai Yu, Kai Sun, Lu Chen and Su Zhu. Constrained Markov Bayesian Polynomial for Efficient Dialogue State Tracking. IEEE/ACM Transactions on Audio, Speech and Language Processing (TASLP). 2015. pdf bib
Vlad Niculae, Kai Sun, Xilun Chen, Yao Cheng, Xinya Du, Esin Durmus, Arzoo Katiyar and Claire Cardie. Cornell Belief and Sentiment System at TAC 2016. Text Analysis Conference (TAC). 2016.
Mohamed Al-Badrashiny, Jason Bolton, Arun Tejavsi Chaganty, Kevin Clark, Craig Harman, Lifu Huang, Matthew Lamm, Jinhao Lei, Di Lu, Xiaoman Pan, Ashwin Paranjape, Ellie Pavlick, Haoruo Peng, Peng Qi, Pushpendre Rastogi, Abigail See, Kai Sun, Max Thomas, Chen-Tse Tsai, Hao Wu, Boliang Zhang, Chris Callison-Burch, Claire Cardie, Heng Ji, Christopher Manning, Smaranda Muresan, Owen C. Rambow, Dan Roth, Mark Sammons and Benjamin Van Durme. TinkerBell: Cross-lingual Cold-Start Knowledge Base Construction. Text Analysis Conference (TAC). 2017.
Kai Sun and Claire Cardie. Cornell Belief and Sentiment System at TAC 2017. Text Analysis Conference (TAC). 2017.