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Data Analysis and Knowledge Discovery  2018, Vol. 2 Issue (2): 64-73    DOI: 10.11925/infotech.2096-3467.2017.0929
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The Evolution of Online Public Opinion Based on Spatial Autocorrelation
Jingqi Wang1,Rui Li1,2(),Huayi Wu1,2
1(State Key Laboratory of Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China)
2(Collaborative Innovation Center of Geospatial Technology, Wuhan 430079, China)
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Abstract  

[Objective] This paper aims to investigate the evolution of online public opinion by analyzing the spatial-temporal distribution patterns of topic evolution. [Methods] First, we used the LDA model to extract topics from news and then calculated the quantitative topic intensity index to measure their popularity. Second, we adopted spatial autocorrelation method to examine the distribution of topic intensity on “tourism” as well as its changes over time based on Moran’s I Index. [Results] The global distribution of topic intensity was clustered and characterized by the global Moran’s I index. The local distribution of topic intensity had hot spots, abnormal high values and low values. [Limitations] Only collected data from Xinhuanet, which might yield in-complete results. [Conclusions] The proposed method could effectively extract the spatial-temporal patterns of online public opinion, which improves the decision-making and early warning mechanism.
Key words： Spatial Autocorrelation      Moran’s I Index      LDA Model      Topic Evolution      Internet Public Opinion     
Received: 18 September 2017      Published: 07 March 2018
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Jingqi Wang
Rui Li
Huayi Wu

Cite this article:

Jingqi Wang,Rui Li,Huayi Wu. The Evolution of Online Public Opinion Based on Spatial Autocorrelation. Data Analysis and Knowledge Discovery, 2018, 2(2): 64-73.

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http://manu44.magtech.com.cn/Jwk_infotech_wk3/EN/10.11925/infotech.2096-3467.2017.0929     OR     http://manu44.magtech.com.cn/Jwk_infotech_wk3/EN/Y2018/V2/I2/64

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