資訊檢索策略與技巧-文庫(kù)吧資料
2024-10-19 09:07本頁(yè)面
【正文】 odes ? Nonsemantic bibliographic characteristics ? 非主題相關(guān)的欄位，如資料類(lèi)型、語(yǔ)言、年代等 ? 包括同義詞、類(lèi)同義詞、狹義詞、相關(guān)詞 ? fields to be searched 7 Building Blocks Search Strategy3/4 6. For each distinct facet of the search, a set of postings will be created for each search string within that facet. The sets are then bined into a single set representing that facet using Boolean OR 7. Following setp6, the facets sets themselves will be bined with Boolean AND and NOT 8. Plan alternatives 8 Building Blocks Search Strategy4/4 9. Formulate the initial statements of the search in the mand language of the system 10. Logon and put the search to the system 11. Evaluate the intermediate results 12. Iterate ? Use the interactive features of the system to carry out search heuristics ? tactics, maneuvers, strategies, tricks, devices, approaches, to try to improve search results 9 Building blocks 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(chēng) ? 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
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