Prevailing Trends Detection of Public Opinions Based on Tianya Forum

How to catch both the central topics and the trend of topics over the on-line discussions are not only of theoretical importance for scientific research, but also of practical importance for social management in current China. In social management perspective, making intervention toward crisis timely and precisely depends on the right image or perception of public opinions toward the crisis. In our research, topic modeling is applied to explore the changing topics of new posts collected from Tianya Zatan Board of Tianya Club. Those online data reflect the community opinions toward social problems.