信息检索的基本方法.ppt

第二章 信息检索的基本方法,Outline,布尔逻辑检索 邻近检索 短语检索 截词检索 字段限制检索 区分大小写检索 其它方法,1 布尔逻辑检索(Boolean Logic),逻辑与 AND (*) 逻辑非 NOT, AND NOT(-) 排除无关结果,逻辑或 OR (+)(l) 并行搜索 管道搜索,2 邻近检索（Proximity Search),WITH（W） Wuhan（W）university Wuhan University, Wuhan - University ，或Wuhan, University (nW) Wuhan （1W） university Wuhan Medical University, Wuhan Agricultural University, Wuhan Technology University ,NEAR（N） Wuhan （N） university Wuhan University, Wuhan - University ，或Wuhan, University University, Wuhan ; University - Wuhan; University Wuhan (nN) Wuhan （1N） university Wuhan (1N) university 还可检出university of wuhan ,university in wuhan,3 短语检索（Phrase Search, Exact Search）,“Peoples Republic of China” “ The World Intellectual Property Organization” “George W. Washington” George W. Bush spoke at Washington D.C. about human rights “Washington D.C.” “Information Retrieval System” “Yesterday Once More” “Slumdog Millionaire ”,4 截词检索(Truncation/Wildcat),有时被称为通配符 前截词 *ologygeology,sociology,psychology,archaeology, biology 中间截词 wom?n woman,women 后截词（词尾截词）： 有限截词 computer? ? computer,computers stud? study,studies,studio,studied 无限截断 econom* economy,economic,economics,economical,economist, economize.,5 字段限制检索（Field Limiting),Title(ti): Wuhan University url:gov.cn Py=2009 La=english Link: whitehouse.gov admission AND site:www.harvard.edu AU=Wang li AND (CS=wuhan Univ.),6 区分大小写检索(Case-sensitive）,china-china,China,CHINA ChinaChina Windows, windows windows AND design,7 模糊检索（Fuzzy Search）,概念检索 相关检索 检索检索，搜索，查找，寻求.,8 自然语言检索(Natural Language),智能检索 Could you please give me some information on English literature?,9 多种检索方法的综合运用,课后思考题 查找2009年发表的题名中含有信息检索系统评价的英文论文,The End,Any Questions?,