Modeling Chinese Microblogs with Five Ws for Topic Hashtags Extraction  

作　　者：Zhibin Zhao Jiahong Sun Lan Yao Xun Wang Jiahong Chu Huan Liu Ge Yu 

机构地区：[1]College of Computer Science and Engineering, Northeastern University

出　　处：《Tsinghua Science and Technology》2017年第2期135-148,共14页清华大学学报（自然科学版（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 61173027);the Northeastern University Fundamental Research Funds for the Central Universities (Nos. N150404012 and N140404006)

摘　　要：Hashtags are important metadata in microblogs and are used to mark topics or index messages. However,statistics show that hashtags are absent from most microblogs. This poses great challenges for the retrieval and analysis of these tagless microblogs. In this paper, we summarize the similarity between microblogs and shortmessage-style news, and then propose an algorithm, named 5WTAG, for detecting microblog topics based on a model of five Ws（When, Where, Who, What, ho W）. As five-W attributes are the core components in event description, it is guaranteed theoretically that 5WTAG can properly extract semantic topics from microblogs. We introduce the detailed procedure of the algorithm in this paper including spam microblog identification, microblog segmentation, and candidate hashtag construction. In addition, we propose a novel recommendation computing method for ranking candidate hashtags, which combines syntax and semantic analysis and observes the distribution of artificial topic hashtags. Finally, we conduct comprehensive experiments to verify the semantic correctness and completeness of the candidate hashtags, as well as the accuracy of the recommendation method using real data from Sina Weibo.Hashtags are important metadata in microblogs and are used to mark topics or index messages. However,statistics show that hashtags are absent from most microblogs. This poses great challenges for the retrieval and analysis of these tagless microblogs. In this paper, we summarize the similarity between microblogs and shortmessage-style news, and then propose an algorithm, named 5WTAG, for detecting microblog topics based on a model of five Ws（When, Where, Who, What, ho W）. As five-W attributes are the core components in event description, it is guaranteed theoretically that 5WTAG can properly extract semantic topics from microblogs. We introduce the detailed procedure of the algorithm in this paper including spam microblog identification, microblog segmentation, and candidate hashtag construction. In addition, we propose a novel recommendation computing method for ranking candidate hashtags, which combines syntax and semantic analysis and observes the distribution of artificial topic hashtags. Finally, we conduct comprehensive experiments to verify the semantic correctness and completeness of the candidate hashtags, as well as the accuracy of the recommendation method using real data from Sina Weibo.

关 键 词：hashtag microblog topic detection short-message-style news five Ws 

分 类 号：TP393.092[自动化与计算机技术—计算机应用技术] TP391.1[自动化与计算机技术—计算机科学与技术]