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融合静态与动态建模的网络事件聚合方法
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作者 张敏华 杜友田 王倩 《计算机工程与应用》 CSCD 北大核心 2019年第18期15-20,共6页
网络世界是人们获取信息的重要来源,各大新闻门户网站成为信息产生和传播的主要聚集地。网络信息具有不规范、噪声大、动态性等特点。为了有效地组织网络信息,提出一种结合静态和动态建模的方法来对网络新闻事件进行聚合。静态建模基于... 网络世界是人们获取信息的重要来源,各大新闻门户网站成为信息产生和传播的主要聚集地。网络信息具有不规范、噪声大、动态性等特点。为了有效地组织网络信息,提出一种结合静态和动态建模的方法来对网络新闻事件进行聚合。静态建模基于新闻发帖内容的相似程度进行事件的初步聚合;动态建模是指基于隐马尔可夫模型来刻画事件的动态发展过程,并判断当前新闻发帖是否符合事件的发展规律。该方法将事件聚合从仅考虑内容空间中的相似度推广至包含内容及事件动态规律两个方面的空间来进行相似度度量,对内容相似的不同事件能够进行更好地区分。通过实际数据上的实验测试结果表明,该方法能够有效提升事件聚合的准确性。 展开更多
关键词 事件聚合 动态发展规律 动态时序模型 静态建模
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Spatio-temporal Dynamic Patterns of Rural Area Development in Eastern Coastal China 被引量:4
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作者 LIU Yansui WANG Guogang ZHANG Fugang 《Chinese Geographical Science》 SCIE CSCD 2013年第2期173-181,共9页
The aim of this study is to evaluate the current state of rural area development at the county level in the eastern coastal China. An evaluation index system including 18 factors was developed, and a rural development... The aim of this study is to evaluate the current state of rural area development at the county level in the eastern coastal China. An evaluation index system including 18 factors was developed, and a rural development index (RDI) was constructed to evaluate rural development state in 2000, 2004, and 2008. The quantitative evaluation indicated the following results. 1) This study derived four dominating components by means of principal component analysis, which can explain 78.2% of the total information, namely agricultural production input, the basic condition of agriculture, the comparative effectiveness of grain production, and the household′s own basic conditions. 2) Since the turn of the new millennium, the rural area in the eastern coastal China has experienced a rapid development in general. Well developed, developed, moderately developed and undeveloped rural areas respectively occupied 29.32%, 22.33%, 21.91%, and 10.51% in 2008. 3) The countryside had maintained a sound momentum of developing trend between 2000 and 2008, while the rural development in the eastern coastal China lacked sustainability. And 4) industrialization, urbanization, original economic basis, and location are four major driving forces of the disparity of rural area development in the eastern coastal China. Given these results, the strategies and policies for the improvement of each rural group were put forward. 展开更多
关键词 rural area development rural development evaluation new countryside construction eastern coastal China
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