I did not go to Beijing for leisure. Actually I went there to present a paper at an international conference, and to pay visits to Dr. Zhang Li and Dr. Shi Yuanchun at TsingHuaUniversity. The pictures posted here were taken after work.
While at TsinghuaUniversity, I gave a seminar on our own work on Recommender Systems to a group of research students. Recommender systems are used in places like Amazon. When you examine a book at Amazon, it informs you that “customers who bought this item also bought …” That’s an example of a recommender system. Some of them are based on the idea that people who are interested in the same items share some common interest, and you are likely to be interested in the other items that they were interested in. That’s call collaborative filtering. We are doing some work that can make use of the sentiments expressed in textual reviews to make recommendations, and that's what I presented at Tsinghua.