标题：A fast hierarchical topic detection method
作者：Wang, Wei ;Jiang, Mingyan ;Yuan, Dongfeng
作者机构：[Wang, Wei ;Jiang, Mingyan ;Yuan, Dongfeng ] School of Information Science and Engineering, Shandong University, Jinan 250100, China
来源：Journal of Convergence Information Technology
关键词：Hierarchical topic detection; Text clustering; Topic detection
摘要：Facing to huge network text data, how to analyze Internet news reports timely and effectively is more and more concerned. A fast hierarchical topic detection method is proposed with following two improvements. On the one hand, based on the traditional topic detection method of K-means, the new method improves the detection process by using a new parameter of news's contribution for topics to have better adaptability of hierarchical topics. The experimental results also present that this new method has better detection performance, especially for those hierarchical topics. On the other hand, based on the above-mentioned method, an improved hierarchical clustering algorithm is further explored. The result demonstrates that different aspects of hierarchical topics could be fully described with low time processing complexity.