資訊檢索策略與技巧-wenkub
2022-10-22 09:07:56 本頁(yè)面
【正文】 s approach Facet A Facet B Term A1 OR Term A2 OR …… ….. Term Ap Term B1 OR Term B2 OR …… ….. Term Bq Fact C Term C1 OR Term C2 OR …… ….. Term Cr Answer Set Boolean bination of facets (AND, OR, NOT) 10 Building Blocks search sample Facet 1 Facet 2 Facet 3 Facet 4 Facet 5 RISK MEASUREMENT RISK AVERSION BEHAVIORAL DECISION THEORY INSURANCE risk measurement assessment choice decision oute risk aversion risk avoidance risk neutrality risk prone risk tendency behavioral decision theory insurance contract bank finance stock investment advertisement Measurement of Risk Tendencies（ ? looking for high recall） Boolean Combination: ((RISK AND MEASUREMENT) OR RISK AVERSION OR BEHAVIORAL DECISION THEORY) NOT INSURANCE 11 檢討結(jié)果重新檢索 ? 想增加 recall時(shí) ? find additional concepts or search terms to add to one or more facets ? delete a facet ? 想增加 precision時(shí) ? delete some of the more broader or more ambiguous terms in the facets ? add an additional facet to be intersected with the others 12 Successive facet strategies 主題層面連續(xù)檢索法 — 1/3 ? 其他名稱 ? fewest postings first （最少筆數(shù)優(yōu)先） ? most specific concept first （最精確概念優(yōu)先） ? successive fractions （非以主題層面開(kāi)始的連續(xù)檢索） ? 分區(qū) ?分區(qū)檢索法 ?使用所有主題層面 ?主題層面連續(xù)檢索法 ?設(shè)法動(dòng)用最少的主題層面 ? 決定檢索問(wèn)題的主題層面後，需確定其優(yōu)先順序，視結(jié)果決定是否要繼續(xù)進(jìn)行檢索 13 Successive facet strategies2/3 First Facet Second Facet (optional) Other Facet (optional) Other Facet Solution Set (optional) AND AND 例 1：“ members and activities of 4H clubs” 例 2：” the emotional, physical, and intellectual characteristics of children who have studied violin with the Suzuki method” 14 Successive facet strategies3/3 ? 適用情況 ?當(dāng)所有的主題層面以布林運(yùn)算元結(jié)合，很可能產(chǎn)生零筆資料時(shí) ?當(dāng)檢索問(wèn)題中有一至兩個(gè)主題層面涵義相當(dāng)模糊時(shí) ?當(dāng)檢索問(wèn)題具備其他非主題之檢索條件，如資料類型、語(yǔ)言、或出版年代等，可將此非主題檢索條件視為第一個(gè)檢索概念時(shí) ?當(dāng)檢索者寧願(yuàn)忍受誤引而不願(yuàn)失去相關(guān)文章時(shí) ?當(dāng)加入其他主題層面所花費(fèi)的時(shí)間和金錢(qián)，可能會(huì)超越直接列印檢索結(jié)果時(shí) ?當(dāng)相關(guān)文獻(xiàn)過(guò)少，檢索者願(yuàn)意檢視一些相關(guān)度較低的文章時(shí) 15 Pairwise Facets 主題層面配對(duì)法 —1/3 ?將主題層面兩兩配對(duì)並取其交集，而後再聯(lián)集之 ?適用情形 ?所有主題層面都同樣重要 ?主題層面之精確性或模糊性相差不大 ?將所有主題層面結(jié)合會(huì)導(dǎo)致零筆資料 ?注意：主題層面過(guò)多時(shí)，盡量以 34個(gè)為執(zhí)行交集的基本單位，以免混淆 16 Pairwise Facets—2/3 分區(qū)組合檢索 主題層面配對(duì)檢索
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