Mandatory, A+B

IDAverage precisionR-PrecisionMODETOPIC-LANGTOPIG-TAGTARGET-CORPUSTRAINING-CORPUSINDEX-UNITINDEXINGINDEX-STRUCTUREQUERY-UNITSEARCH-MODERANKIG-FACTORQUERY-EXPANSIONTRANSLATION
LAPIN4[result,desc]0.26420.2862autoJAARTICLE SUPPLEMENTkkh98 kkh99irexcharacter n-gramnormalization of token forminverted filewordprobabilistic modeltf + document length + term weightpseudo feedbacknone
LAPIN5[result,desc]0.25450.2834autoJAARTICLE SUPPLEMENTkkh98 kkh99character n-gramnormalization of token forminverted filewordprobabilistic modeltf + document length + term weightpseudo feedbacknone
LAPIN3[result,desc]0.25290.2859autoJAARTICLE SUPPLEMENTkkh98 kkh99irexcharacter n-gramnormalization of token forminverted filewordprobabilistic modeltf + document length + term weightpseudo feedbacknone
LAPIN2[result,desc]0.24450.2688autoJAARTICLE SUPPLEMENTkkh98 kkh99irexcharacter n-gramnormalization of token forminverted filewordprobabilistic modeltf + document length + term weightpseudo feedbacknone
DOVE4[result,desc]0.20350.2450manualJAARTICLE SUPPLEMENTkkh98 kkh99nonewordmorphological analysisinverted filewordvector space modelSMARTnonenone
DTEC1[result,desc]0.20140.2483manualJAARTICLE SUPPLEMENTkkh98 kkh99nonewordmorphological analysisinverted filewordvector space modeltf/idf + document length normalizationnonenone
DTEC3[result,desc]0.18430.2333manualJAARTICLE SUPPLEMENTkkh98 kkh99nonewordmorphological analysisinverted filewordvector space modeltf/idf + document length normalizationnonenone
daikyo[result,desc]0.18070.2369manualJAARTICLE SUPPLEMENTkkh98 kkh99ntcir2n-gramn-graminverted n-gramwordprobabilistic modeltf/idf + document normalization + word weightsinonymynone
DTEC2[result,desc]0.17840.2160manualJAARTICLE SUPPLEMENTkkh98 kkh99nonewordmorphological analysisinverted filewordvector space modeltf/idf + document length normalizationnonenone
DTEC4[result,desc]0.16460.2034manualJAARTICLE SUPPLEMENTkkh98 kkh99nonewordmorphological analysisinverted filewordvector space modeltf/idf + document length normalizationnonenone
DOVE1[result,desc]0.15960.1830autoJAARTICLE SUPPLEMENTkkh98 kkh99nonewordmorphological analysisinverted filewordvector space modelSMARTnonenone
brklypat1[result,desc]0.13790.1685autoJAARTICLE SUPPLEMENTkkh98 kkh99bi-charactercharacter analysisinverted filebi-characterprobabilistic modeltf,dl,ql,clnonenone
SRGDU3[result,desc]0.12820.1565autoJAARTICLE SUPPLEMENTkkh98 kkh99wordlongest matching with a dictionaryinverted filewordOkapitf + idf + dlnonenone
SRGDU5[result,desc]0.12810.1565autoJAARTICLE SUPPLEMENTkkh98 kkh99wordlongest matching with a dictionaryinverted filewordvector space modeltf/idf + cosine measurepsudo feedback, Rocchio methodnone
SRGDU1[result,desc]0.11520.1421autoJAARTICLE SUPPLEMENTkkh98 kkh99wordlongest matching with a dictionaryinverted filewordOkapitf + idf + dlpseudo feedback, original method using Taylor expansionnone
DTEC5[result,desc]0.10830.1499autoJAARTICLE SUPPLEMENTkkh98 kkh99nonewordmorphological analysisinverted filewordvector space modeltf/idf + document length normalizationnonenone
IFLAB6[result,desc]0.07780.1140autoJAARTICLE SUPPLEMENTkkh98 kkh99noneword-based bigrammorphological analysisinverted fileword-based bigramProbabilistic modelOkapinonenone
IFLAB5[result,desc]0.06150.0997autoJAARTICLE SUPPLEMENTkkh98 kkh99nonewordmorphological analysisinverted filewordProbabilistic modelOkapinonenone
brklypat3[result,desc]0.05600.0927autoENARTICLE SUPPLEMENTkkh98 kkh99paj1995j.txt paj1996j.txt paj1997j.txt paj1995e.txt paj1996e.txt paj1997e.txtbi-charactercharacter analysisinverted filewords in English queries, but bi-character in translated Japanese queryies.probabilistic modeltf,dl,ql,clnonecorpus-based
sics1[result,desc]0.00030.0022manualENARTICLE SUPPLEMENTkkh98 kkh99paj95 paj96 paj97wordmorphological analysisstandard inquerywordvector space modelstandard inquerygsmdgsmd