兰州4·11水污染事件的微博文本的研究

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1、华中科技大学硕士学位论文issues，themediamicroblogshouldtrytoensurethatthediscoursepresentsasummaryofthemulti-issueandmulti-angle，andstriveforallpeopleoncognitiveenvironmentalpollutionpresentsariskapproachingfullpanorama，transferandsharingavailableinformationresourceseffectively，improveenvironment

2、alrisksofsocialvisibility.Keywords：EnvironmentalpollutionEnvironmentalriskWaterpollutionMediaconstructionIII华中科技大学硕士学位论文目录摘要···················································································IAbstract····································································

3、·············II1绪论1.1选题背景和选题意义························································(1)1.2理论基础及研究现状························································(2)1.3现实背景·······································································(9)2事件回顾和类目建构2.1目标事件的选择和事件始末··················

4、···························(14)2.2分析样本的选择····························································(15)2.3类目建构·····································································(18)3微博文本分析3.1微博内容分析·······························································(20)3.2微博风险框架·······

5、························································(38)4分析与讨论4.1喉舌类专业媒体微博对环境污染议题的建构························(43)4.2商业类媒体微博对环境污染议题的建构······························(47)4.3自媒体微博对环境污染议题的建构····································(49)4.4不同性质媒体在环境污染议题上的微博建构差异探析············(51)IV华中科技大学硕士学位论文

6、5结语5.1喉舌类专业媒体微博······················································(54)5.2商业类媒体微博····························································(54)5.3公众自媒体··································································(54)致谢·························································

7、······················(56)参考文献············································································(58)V华中科技大学硕士学位论文1绪论1.1选题背景和选题意义1.1.1选题背景近年来，有关环境污染的事件频发，水污染与水资源短缺、大气污染和酸雨现象、土壤污染、土地荒漠化、固体废弃物污染等问题十分严峻，雾霾问题、PM2.5也成为人民每天出门前关注的焦点。《中国环境经济核算研究报告2010（公众版）》指出，2004年的虚拟治理成本为2874.4亿元，2

8、010年提高到5589.