图 书 馆
利用相关主题中文档内容的时间动态Leveraging Temporal Dynamics of Document Content in Relevance Ranking |
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| 课程网址: | http://videolectures.net/wsdm2010_elsas_ltd/ |
| 主讲教师: | Jonathan Elsas |
| 开课单位: | 卡内基梅隆大学 |
| 开课时间: | 2010-03-22 |
| 课程语种: | 英语 |
| 中文简介: |  |
| 课程简介: | Many web documents are dynamic, with content changing in varying amounts at varying frequencies. However, current document search algorithms have a static view of the document content, with only a single version of the document in the index at any point in time. In this paper, we present the first published analysis of using the temporal dynamics of document content to improve relevance ranking. We show that there is a strong relationship between the amount and frequency of content change and relevance. We develop a novel probabilistic document ranking algorithm that allows differential weighting of terms based on their temporal characteristics. By leveraging such content dynamics we show significant performance improvements for navigational queries. |
| 关 键 词: | 文档搜索算法; 静态视图; 时间动态; 导航查询 |
| 课程来源: | 视频讲座网 |
| 最后编审: | 2019-11-11：lxf |
| 阅读次数: | 16 |