信息检索与数据挖掘 2019/3/7 21 回顾：词条化 Term Doc# 实际排序的不是词条D而是词条 did 1 enact ·将每篇文档转换成一个个词条的列表并 julius 1 caesar 1 加上文档的D 1 was 1 killed r the 1 capitol 1 brutus 1 killed 1 me 1 Doc 1 Doc 2 So 2 let 2 it 2 be 2 with 2 I did enact Julius So let it be with caesar 2 Caesar I was killed Caesar.The noble the 2 i'the Capitol; Brutus hath told you noble 2 brutus 2 Brutus killed me. Caesar was ambitious hath 2 told 2 you 2 caesar 2 was 2 21 ambitious 2信息检索与数据挖掘 2019/3/7 21 回顾：词条化 实际排序的不是词条ID而是词条 • 将每篇文档转换成一个个词条的列表并 加上文档的ID Term Doc # I 1 did 1 enact 1 julius 1 caesar 1 I 1 was 1 killed 1 i' 1 the 1 capitol 1 brutus 1 killed 1 me 1 so 2 let 2 it 2 be 2 with 2 caesar 2 the 2 noble 2 brutus 2 hath 2 told 2 you 2 caesar 2 was 2 ambitious 2 I did enact Julius Caesar I was killed i' the Capitol; Brutus killed me. Doc 1 So let it be with Caesar. The noble Brutus hath told you Caesar was ambitious Doc 2 21