Visualizing overlap and rank differences among web-wide search engines: Some free tools and services
Visualizing overlap and rank differences among web-wide search engines: Some free tools and services
复制标题
可视化全网搜索引擎之间的重叠和排名差异：一些免费工具和服务
DOI：
10.1108/14684520510628927
复制
发表时间：
2005
期刊：
影响因子：
--
通讯作者：
P. Jacsó
中科院分区：
文献类型：
--
作者：
P. Jacsó
目的-比较不同搜索引擎的性能，突出重叠和排名差异。设计/方法/方法-提供自1980年代中期以来在传统光盘索引/摘要数据库、网络数据库和作者自己的多元搜索引擎之间的重叠测试搜索系列的结果，并审查谷歌学术。查找-发现在爬行和索引基本上无结构的开放网络的网络范围搜索引擎中重叠最小；而谷歌学者和原生搜索引擎之间的重叠远远低于对高度结构化和元数据丰富的集合进行爬行和索引的最佳上下文中理想的100%。原创性/价值-强化了现有的观点，即要进行全面的搜索，必须搜索多个数据库。重点介绍和推荐了几个非常好的搜索引擎站点。
Purpose – To compare the performance of different search engines, highlighting the overlap and rank differences.Design/methodology/approach – Presents results of an overlap test search series among traditional CD‐ROM indexing/abstracting databases since the mid‐1980s, web databases, and authors' own polysearch engine, and reviews Google Scholar.Findings – Finds that overlap is minimal among web‐wide search engines which crawl and index the mostly unstructured open web; and that overlap among Google Scholar and the native search engines is far less than the ideal 100 per cent in the optimal context of crawling and indexing highly‐structured and metadata‐rich collections.Originality/value – Reinforces the existing view that for comprehensive searches one must search more than one database. Highlights and recommends several very good search engine sites.