图 书 馆
网络搜索中的新旧程度排名Towards Recency Ranking in Web Search |
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| 课程网址: | http://videolectures.net/wsdm2010_dong_trr/ |
| 主讲教师: | Anlei Dong |
| 开课单位: | 雅虎硅谷研究院 |
| 开课时间: | 2010-02-22 |
| 课程语种: | 英语 |
| 中文简介: |  |
| 课程简介: | In web search, recency ranking refers to ranking documents by relevance which takes freshness into account. In this paper, we propose a retrieval system which automatically detects and responds to recency sensitive queries. The system detects recency sensitive queries using a high precision classifier. The system responds to recency sensitive queries by using a machine learned ranking model trained for such queries. We use multiple recency features to provide temporal evidence which effectively represents document recency. Furthermore, we propose several training methodologies important for training recency sensitive rankers. Finally, we develop new evaluation metrics for recency sensitive queries. Our experiments demonstrate the efficacy of the proposed approaches. |
| 关 键 词: | 检索系统; 新旧程度敏感查询; 机器学习 |
| 课程来源: | 视频讲座网 |
| 最后编审: | 2019-11-11：lxf |
| 阅读次数: | 43 |