基于Nutch的农村信息服务移动垂直搜索引擎研究  

Nutch-based Research on the Mobile Vertical Search Engine for Rural Information Service

作　　者：赵永鑫[1] 张友华[1] 辜丽川[1] 胡嘉伟[1] 陈莹[1] 

机构地区：[1]安徽农业大学信息与计算机学院,安徽合肥230036

出　　处：《洛阳理工学院学报（自然科学版）》2015年第3期53-56,共4页Journal of Luoyang Institute of Science and Technology：Natural Science Edition

基　　金：国家自然科学基金(31371533);安徽省自然基金(1308085MF89);安徽省十二五科技攻关项目(1301032169);国土资源部公益性行业科研专项(201411006)资助

摘　　要：农村信息服务移动垂直搜索引擎技术是提高农业信息获取精准性、增强农户搜索体验感的关键性技术,是农业信息服务领域的研究重点和热点。利用Nutch引擎技术和向量空间模型算法,结合国家地名词典,实现了网页地理位置信息的提取和农村信息服务主题过滤。在分析面向集合的文本搜索倒排文件(inverted file)索引和面向二维空间的R-tree索引基础上,构建了先倒排文件后R-tree混合索引,实现了地理信息和Web数据的整合集成以及更快速的检索。结果表明,针对农村信息服务,基于Nutch的农村信息服务移动垂直搜索引擎具有较高的检索质量,能够满足农户移动检索的需求。The mobile vertical search engine technology for rural information service is the research priority and focus in current agricultural information service, as well as the key to improve the accuracy of agriculture information acquisition and enhance the search experience sense of the farmers. Using the Nutch engine technology and vector space model algorithm, combined with the national geographical names dictionary, the research has achieved the extraction of website geographical location and the filtration of rural information service themes. Based on the analysis of the set-oriented inverted file index of text search and the 2D oriented R - tree indexes, it constructs a hybrid index of inverted file followed up with R-tree and thus realizes the integration of geographic data and web data to make a faster retrieval. The results show that the Nutch based mobile vertical search engine for rural information service has a higher retrieval quality to meet the mobile information retrieval needs of farmers.

关 键 词：农村信息服务 移动检索 地理标记 混合索引 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]