Dynamic model combining with time facter for event tracking
XU Jianmi · Journal of Computer Applications · 2013
Concerning the Internet news tracking,the study put forward a dynamic model for event tracking with reference to the time information.The dynamic model introduced the time factor into the traditional vector model to get the time similarity of the same characteristic words between the document and the event,and then applied the time similarity to calculate the similarity of the document and the event.If a document was related to the event,the new characteristic words in the document would be added to the event term set,and the weight and time information of characteristic words in the event term set should be re-adjusted.The experiment was evaluated by Detection Error Tradeoff(DET),and the results show that the dynamic model for event tracking improves the system performance effectively,and its minimum normalized cost of tracking loss is reduced by about 9%.