中文摘要：

针对从微博中尽可能全面的获取事件信息的需求，提出了基于迭代策略的微博事件查询扩展方法。介绍了事件查询迭代扩展的模型，讨论了该模型的核心技术；在深入分析事件查询项特点的基础上，提出了事件要素的近义扩展和关联扩展方法；根据微博媒体类型的特点，提出了新颖的扩展事件查询项的组装方法。以8个事件查询项为例，面向腾讯微博，在迭代扩展次数、近义扩展、关联扩展等方面进行了实验评测。结果表明，提出的融合了微博媒体特点和事件查询特点的迭代扩展方法，改善了微博事件查询获取信息的性能。

英文摘要：

To meet the requirements of obtaining comprehensive mieroblog event information, an iterative strategy based microblog event query expansion method is proposed. The model of iterative expansion of event query is introduced, and the key techniques are discussed. With in deep analysis of the characteristics of event query to the microblog data, our novel model applies the near-synonymy expansion and associated expansion for event elements. Furthermore, the method of assembling expanded event query is proposed according to the characteristics of microblog. Using eight event queries on Tencent microblog, the experiment is conducted to evaluate iterative expansion number, near-synonymy expansion and associated expansion. The experimental results show that the proposed method of iterative expansion incorporating the characteristics of microblog and event query improves the performance of obtaining event information from microblog.