计算机信息检索 computerized Information Retrieval 工程硕士) 2005.3
计算机信息检索 Computerized Information Retrieval （工程硕士） 2005.3
信息检索词汇( terms) Information retrieval (R) Information access(obtain) Information search (look for) Information searching (look for) Information seeking (focus on users, active) locate hit
2 信息检索词汇（terms） Information retrieval (IR) Information access (obtain) Information search (look for) Information searching (look for) Information seeking (focus on users, active) locate hit
1.信息检索发展阶段 ●手工操作( manua 计算机化( computerized) ●网络化( networked) ●智能化( intelligentized) ●认知化( cognized) What's searching like? Finding a needle in a haystack?
3 1. 信息检索发展阶段 ● 手工操作 (manual) ● 计算机化 (computerized) ● 网络化 (networked) ● 智能化 (intelligentized) ● 认知化 (cognized) What’s searching like? “Finding a needle in a haystack
2.主要检索系统类型 联机检索( online search 脱机检索( offline search) 光盘检索( CD search) 网络检索( Interne/ Web search) 全球数字图书馆系统( digital g1obal system)
4 2. 主要检索系统类型 • 联机检索(online search) 脱机检索（offline search） • 光盘检索（CD search） • 网络检索（Interne/Web search） 全球数字图书馆系统（digital global system）
2.1联机检索( online search) The process of locating specific pieces of info from one or more databases that reside/ on the computers(hosts). The search is a true interaction between you and search system 主机 据库 微机 WAN 检索终端 通信网络联机检索中心 Feature: interaction. rea time remote, Direct Internet
5 通信网络 联机检索中心 检索终端 数据库 2.1 联机检索(online search) The process of locating specific pieces of info from one or more databases that reside on the computers(hosts). The search is a true interaction between you and search system. 主机 Feature: interaction, real time remote, Direct Internet 微机 WAN