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????????? boolean ??

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Title: Author: nakagawa Last modified by: nakagawa Created Date: 7/6/2000 7:25:37 AM Document presentation format – PowerPoint PPT presentation

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Title: ????????? boolean ??


1
?????????????????
  • ????????? boolean ??
  • ??????????

2
???????
  • ???????????Q ??or( ???and ??)
  • ???????????????t ??????????D(t)
    ????????????????????(1) ???????????????????
  • D( ??) or (D( ???) and D( ??))
  • ???????????????????
  • ???????????????????0 ?????????????????????????????
    ?????????????????

3
????????? Mixed Min and Max
  • ???????????A ???????D?A ?????????????dA
    ???????????tfidf
  • dAandB min(dA dB )? dAorB max(dA
    dB )
  • ???A1, A2, ... , An ???D ?????????????????? sim(
    ????? ??) ?and ?or ????????????
  • sim((A1orA2ororAn)D)
  • Cor1 max(dA1 dA2 dAn )
  • Cor2 min(dA1 dA2 dAn )
  • sim((A1andA2andandAn)D)
  • Cand1 min(dA1 dA2 dAn )
  • Cand2 max(dA1 dA2 dAn )
  • Cor1 gt Cor2 Cand1 gt Cand2
  • ???????????????????????????????????????????

4
????????? Paice ???
  • ???A1, A2, ... , An ???D ?????????????????? sim(
    ????? ??) ?????????
  • and ????r 10 ?or ???? r 07 ?????????????

5
????????? P-norm???
  • ??D ???????Ai ????dAi(lt1) ??????????Ai ????qi
    ?????????or ?and ??????????sim( ??D) ?????????
  • P ?1 ??????????????????????????
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