Classifying Topics of Internet Public Opinion from College Students: Case Study of Sina Weibo
Jia Longjia1,2(), Zhang Bangzuo3
1School of Mathematics and Statistics, Northeast Normal University, Changchun 130024, China 2Department of Planning and Development, Northeast Normal University, Changchun 130024, China 3School of Computer Science and Information Technology, Northeast Normal University, Changchun 130024, China
[Objective] This paper introduces a term weighting method to classify topics of Sina Weibo posts by college students, aiming to solve the high dimension and sparsity issues. [Methods] First, we calculated the probability of a term’s falling to specific categories and then predicted the probability of a document’s category. Then, we converted the word-based features to a class-based matrix, which was classified by the support vector machine. [Results] Our new method increased the MicroF1/MacroF1values of the traditional tf, tf×idf and tf×rf methods by 7.2%/7.8%, 7.5%/7.9% and 6.4%/5.7%, respectively. [Limitations] More research is needed to explore topic classification methods other than the term weighting one in this paper. [Conclusions] The proposed method could effectively reduce the dimension of feature matrix and improve the classification efficiency for Internet public opinion studies.
贾隆嘉, 张邦佐. 高校网络舆情安全中主题分类方法研究*——以新浪微博数据为例[J]. 数据分析与知识发现, 2018, 2(7): 55-62.
Jia Longjia,Zhang Bangzuo. Classifying Topics of Internet Public Opinion from College Students: Case Study of Sina Weibo. Data Analysis and Knowledge Discovery, 2018, 2(7): 55-62.
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