山东大学学报 (工学版) ›› 2020, Vol. 50 ›› Issue (5): 118-126.doi: 10.6040/j.issn.1672-3961.0.2019.371
• • 上一篇
张岩1,2,李英冰1*,郑翔3
ZHANG Yan1,2, LI Yingbing1*, ZHENG Xiang3
摘要: 将情感分析模型、动态演化模型、话题聚类模型、网络社团模型结合地理可视化技术应用到台风的灾害评估中。将微博情绪与台风灾害联系起来,从情感值与讨论热度两个角度入手,根据台风“山竹”相关话题的25 798条微博数据,完整的展示本次事件网络舆情的演化过程,通过隐含狄利克雷分布(latent dirichlet allocation, LDA)主题模型挖掘用户关注话题,发现台风登陆事件与湖南收费站事件对公众情绪的消极影响;抽取台风“山竹”相关微博中蕴含的地理位置信息,建立广东省21个城市的网络社团模型,检验用户情绪、城市词频、用户位置、网络节点活跃度等指标探测受灾城市的能力;根据广东省38个气象站点的24 h最大降雨数据进行空间插值。降水主要集中在广东南部地区,阳江市发生特大暴雨,引发了严重的洪涝灾害,其情绪值也是最低的。
中图分类号:
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