DóùDòùóDòó×ó ××óóòDYòDù×DDYò DDDDY×òòóùòóóòò ××óòùó í

  • 格式:pdf
  • 大小:188.95 KB
  • 文档页数:8

Model-basedFeedbackinthe
LanguageModelingApproachtoInformationRetrieval

ChengxiangZhaiSchoolofComputerScienceCarnegieMellonUniversityPittsburgh,PA15213JohnLafferty
SchoolofComputerScience
CarnegieMellonUniversity
Pittsburgh,PA15213

ABSTRACT

1.INTRODUCTION
2.PREVIOUSFEEDBACKMETHODSIN
THELMFRAMEWORK
3.THEKL-DIVERGENCERETRIEVAL
MODEL
4.AGENERATIVEMODELOFFEEDBACKDOCUMENTS5.DIVERGENCEMINIMIZATIONOVER
FEEDBACKDOCUMENTS
00.10.20.30.40.50.60.70.800.20.40.60.81baseline-nofbmixture-fbdiv-min-fb0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0
0.20.40.60.81
baseline-nofb

mixture-fb
div-min-fb
0.1
0.150.20.250.30.3500.20.40.60.81mixturediv-minno-feedback0.10.15
0.2
0.25
0.3
0.35
00.20.40.60.81
mixture

div-min
no-feedback
0.16
0.18
0.2
0.22
0.24
0.26
0.28
0.3
0.32
0.34
00.20.40.60.81
AP-mix
AP88-89-div-min
WEB-mix
WEB-div-min
TREC8-mix
TREC8-div-min
9.REFERENCES