| 基于Language Model的地理信息检索模型(英文) |
| |
| 引用本文： | 黎志升,王煦法. 基于Language Model的地理信息检索模型(英文)[J]. 中国科学技术大学学报, 2010, 40(2). DOI: 10.3969/j.issn.0253-2778.2010.02.017 |
| |
| 作者姓名： | 黎志升 王煦法 |
| |
| 作者单位： | 中国科学技术大学计算机科学与技术系人工智能实验室,安徽合肥,230027 |
| |
| 摘 要： | 区别于传统的信息检索,地理信息检索通过一个查询范围词来限制用户的兴趣区域.目前的技术一般是把该查询范围词作为一个过滤器,将在该范围之外的文档排除在查询结果外.但是,词在地理空间的频率分布并不是均匀的,因此词在排序结果中的重要性应该随着查询范围的变化而有所改变.为此,提出了一种新的基于语言模型的地理信息查询模型,把查询范围引入到传统的语言模型中.在该模型中,引入了一个local model来描述查询词的地理分布特性.实验结果表明,新的检索模型优于TF-IDF与传统的语言模型.
|
| 关 键 词： | 语言模型 地理感知 地理 信息检索 |
Location-aware language model for geographic information retrieval |
| |
| LI Zhisheng,WANG Xufa. Location-aware language model for geographic information retrieval[J]. Journal of University of Science and Technology of China, 2010, 40(2). DOI: 10.3969/j.issn.0253-2778.2010.02.017 |
| |
| Authors: | LI Zhisheng WANG Xufa |
| |
| Affiliation: | LI Zhisheng,WANG Xufa(Department of Computer Science , Technology of USTC,Hefei 230027,China) |
| |
| Abstract: | Different from conventional information retrieval,GIR has an additional query spatial scope to restrict the user's interested area.Existing works usually employ the query spatial scope as a document filter in the ranking process.However,word specificity over geographic space does not distribute uniformly so that the importance of words should vary with the query spatial scope.A new geographic information retrieval model,namely location-aware language model(LALM),was thus proposed to incorporate the query sp... |
| |
| Keywords: | language model location-aware geographic information retrieval |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
