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网络信息检索的基本方法
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网络信息检索的基本方法 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
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1 布尔逻辑检索(Boolean Logic)
逻辑与 AND (*) 逻辑或 OR (+)(l) 并行搜索、管道搜索 逻辑非 NOT, AND NOT(-) 排除无关结果
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思考题 查找美国信息资源管理政策有关的文献 信息资源管理 AND 政策 AND美国
(information resource management ) AND policy AND American
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思考题 查找网络有关的信息 Internet OR (World Wide Web) OR Web
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2 邻近检索(Proximity Search)
WITH(W) Wuhan(W)university Wuhan University, Wuhan - University ,或Wuhan, University
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(nW) Wuhan (1W) university Wuhan Medical University, Wuhan Agricultural University, Wuhan Technology University ……
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2 邻近检索 NEAR(N) Wuhan (N) university
2 邻近检索 NEAR(N) Wuhan (N) university Wuhan University, Wuhan - University ,或Wuhan, University University, Wuhan ; University - Wuhan; University Wuhan
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2 邻近检索 (nN) Wuhan (1N) university Wuhan (1N) university—
2 邻近检索 (nN) Wuhan (1N) university Wuhan (1N) university— 还可检出university of wuhan ,university in wuhan……
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3 短语检索 (Phrase Search,Exact Search
“Wuhan University” “ The World Intellectual Property Organization” “George W. Washington” George W. Bush speaks at Washington D.C. about human rights “Washington D.C.” “Global Information Infrastructure” “Foreign Trade Law”
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4:截词检索(Truncation/Wildcat)
前截词 *ology geology,sociology,psychology,archaeology, biology……
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4 截词检索 中间截词 输入wom?n, 可检出woman,women
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4:截词检索 后截词(词尾截词): (1)有限截词。后截几个有限的字母,如名词的单复数,动词的词尾变化等
computer? ?,0-1个字母变化,可检出computer和computers stud??? 0-3个字母变化,可检出study,studies,studio,studied……
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4:截词检索 (2)词尾的无限截断 econom*--
economy,economic,economics,economical,economist, economize…...
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5 字段限制检索(Field Limiting)
Title(ti): Wuhan University url:gov.cn Py>=2004 La=english Link: whitehouse.gov admission AND site: AU=Wang li AND (CS=wuhan Univ.)
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思考题 比较3个检索式检索结果的不同: “Information retrieval”/TI
Information AND retrieval /TI Information(F) retrieval 不仅要求在题名字段中,还要求两者必须与输入的形式完全相同 只要求在题名字段中,而不严格限制它们是短语,如“information organization methods for effective retrieval” 只需要在同一个字段中
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6:区分大小写检索(Case-sensitive)
china--china,China,CHINA China—China Windows, windows windows AND design
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7 模糊检索(Fuzzy Search) 概念检索(相关检索) 如 输入“检索”, 查找,寻找, 找寻, 找一找…….
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8自然语言检索(Natural Language)
智能检索 Could you please give me some information on English literature?
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The End Any Questions? Thanks!
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