A Web mining-based method is put forward to measure the destructiveness of emergencies. After some definitions such as emergency ' s topic , topic ' s destructiveness and dimensions of destructiveness are given, the descructive words database is built and the flow of rueasuring destructive index is introduced. Then we propose the destructiveness measuring methods of single web document and emergencies ' topic. At last, we do some experiments in the field of Urumchi ' s "7 . 5 " fight-smash event,SARS event and " Wenchuan earthbreak" event, which prove that the destructiveness measured by our proposed method is almost the same with the actual situation of the events.%本文利用Web挖掘的相关方法研究并测度突发事件主题的破坏性.首先对突发事件主题、主题破坏性、破坏特征的维度进行了定义,并构建破坏词数据库,对突发事件主题破坏指数的测度流程进行了详细介绍;然后分别给出单条Web文档和突发事件主题的破坏指数测度方法;最后针对乌鲁木齐"7·5"打砸事件、"非典"事件以及"汶川地震"事件进行实验分析,结果证明,本文所提方法和事件自身表现的破坏程度基本符合.
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