PQDD-- (ProQuest Digital Dissertations)

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PQDD--(ProQuest Digital Dissertations)

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• PQDD (ProQuest Digital Dissertations,B)
  ???UMI?????????????,?DAO (Dissertation Abstracts
  Ondisc)???????????????????1000??????????????????16
  0???,???????????????????????

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• 1??????,?1861?????,????130????????
• 2??????,????
• 3?1997??????,??????? ???24?????
• 4??????????????????????????????????29.95??????36
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• 5???Digital Island ??,???????????????
• 6??????2001??1??????,????http//202.120.13.45/umi
  ? http//168.160.17.195/umi/index.jsp

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• ??????2????(A??B?)?????

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• ????????????????????PQDD
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• PQDD????http//wwwlib.global.umi.com/dissertati
  ons/
• ?????????????SEARCH?Enter????????BR
  OWSE???????????

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• ????????,????????????????????????????
• ?????????????(keyword)???(title)???(aut
  hor)???(school)???(subject)???(abstract)???(adviso
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  uage)?????(Publication number)?12???????

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• Keyword??????????????????
• ?????,??????????,????????????
• ????????????,????,?zhang,chunli
• ???????,????????dai-a,???????????dai-b,??????
• ??????UMI???????????????????,?????AAT??7????????
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• ??????????????,????Advanced?????????????????????
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• ?KeywordsFields????????
• ?Search History??????????
• ?Subject Tree????
• ?School Index?????

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• ?????????????????????,?title (cross country
  skiing)
• ??????(boolean)and,or,and not?
  1. ?????
• title (biology) and school (michigan state
  university)
• 2. ?????title(chemistry and not organic)
• ????(truncation)?????,????? ?
• title(econom?)

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• ????(proximity)
• W/n (??????n???,????)
• Pre/n (??????n???,????) ?
  computer w/2 design ?computer pre/2 design
• ????(nesting)??????????????,?
• keyword ((cross country or nordic) and
  skiing)
• ????(refine search)????????????,??????????

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• also an and are as be been between both
  but by did from has have into not of or should
  some such than that the their them themselves
  these they this those through to using were when
  with would

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