Topic Detection and Tracking Review

Topic detection and tracking,as one of natural language processing technologies,is to detect unknown topic and track known topic from the information of news medium.Since its pilot research in 1996,several large-scale evaluation conferences have provided a good environment for evaluating technologies of recognition,collection and organization.As topic detection and tracking shares similar challenges with information retrieval,data mining and information extraction in abrupt and successive data,it has become a hot research issue in the field of nature language processing.This paper introduced the background,definition,evaluation and methods in topic detection and tracking,and explored its future development trend through analyzing current research.