LAPIN4[result,desc] | 0.2642 | 0.2862 | auto | JA | ARTICLE SUPPLEMENT | kkh98 kkh99 | irex | character n-gram | normalization of token form | inverted file | word | probabilistic model | tf + document length + term weight | pseudo feedback | none |
LAPIN5[result,desc] | 0.2545 | 0.2834 | auto | JA | ARTICLE SUPPLEMENT | kkh98 kkh99 | | character n-gram | normalization of token form | inverted file | word | probabilistic model | tf + document length + term weight | pseudo feedback | none |
LAPIN3[result,desc] | 0.2529 | 0.2859 | auto | JA | ARTICLE SUPPLEMENT | kkh98 kkh99 | irex | character n-gram | normalization of token form | inverted file | word | probabilistic model | tf + document length + term weight | pseudo feedback | none |
LAPIN2[result,desc] | 0.2445 | 0.2688 | auto | JA | ARTICLE SUPPLEMENT | kkh98 kkh99 | irex | character n-gram | normalization of token form | inverted file | word | probabilistic model | tf + document length + term weight | pseudo feedback | none |
DOVE4[result,desc] | 0.2035 | 0.2450 | manual | JA | ARTICLE SUPPLEMENT | kkh98 kkh99 | none | word | morphological analysis | inverted file | word | vector space model | SMART | none | none |
DTEC1[result,desc] | 0.2014 | 0.2483 | manual | JA | ARTICLE SUPPLEMENT | kkh98 kkh99 | none | word | morphological analysis | inverted file | word | vector space model | tf/idf + document length normalization | none | none |
DTEC3[result,desc] | 0.1843 | 0.2333 | manual | JA | ARTICLE SUPPLEMENT | kkh98 kkh99 | none | word | morphological analysis | inverted file | word | vector space model | tf/idf + document length normalization | none | none |
daikyo[result,desc] | 0.1807 | 0.2369 | manual | JA | ARTICLE SUPPLEMENT | kkh98 kkh99 | ntcir2 | n-gram | n-gram | inverted n-gram | word | probabilistic model | tf/idf + document normalization + word weight | sinonymy | none |
DTEC2[result,desc] | 0.1784 | 0.2160 | manual | JA | ARTICLE SUPPLEMENT | kkh98 kkh99 | none | word | morphological analysis | inverted file | word | vector space model | tf/idf + document length normalization | none | none |
DTEC4[result,desc] | 0.1646 | 0.2034 | manual | JA | ARTICLE SUPPLEMENT | kkh98 kkh99 | none | word | morphological analysis | inverted file | word | vector space model | tf/idf + document length normalization | none | none |
DOVE1[result,desc] | 0.1596 | 0.1830 | auto | JA | ARTICLE SUPPLEMENT | kkh98 kkh99 | none | word | morphological analysis | inverted file | word | vector space model | SMART | none | none |
brklypat1[result,desc] | 0.1379 | 0.1685 | auto | JA | ARTICLE SUPPLEMENT | kkh98 kkh99 | | bi-character | character analysis | inverted file | bi-character | probabilistic model | tf,dl,ql,cl | none | none |
SRGDU3[result,desc] | 0.1282 | 0.1565 | auto | JA | ARTICLE SUPPLEMENT | kkh98 kkh99 | | word | longest matching with a dictionary | inverted file | word | Okapi | tf + idf + dl | none | none |
SRGDU5[result,desc] | 0.1281 | 0.1565 | auto | JA | ARTICLE SUPPLEMENT | kkh98 kkh99 | | word | longest matching with a dictionary | inverted file | word | vector space model | tf/idf + cosine measure | psudo feedback, Rocchio method | none |
SRGDU1[result,desc] | 0.1152 | 0.1421 | auto | JA | ARTICLE SUPPLEMENT | kkh98 kkh99 | | word | longest matching with a dictionary | inverted file | word | Okapi | tf + idf + dl | pseudo feedback, original method using Taylor expansion | none |
DTEC5[result,desc] | 0.1083 | 0.1499 | auto | JA | ARTICLE SUPPLEMENT | kkh98 kkh99 | none | word | morphological analysis | inverted file | word | vector space model | tf/idf + document length normalization | none | none |
IFLAB6[result,desc] | 0.0778 | 0.1140 | auto | JA | ARTICLE SUPPLEMENT | kkh98 kkh99 | none | word-based bigram | morphological analysis | inverted file | word-based bigram | Probabilistic model | Okapi | none | none |
IFLAB5[result,desc] | 0.0615 | 0.0997 | auto | JA | ARTICLE SUPPLEMENT | kkh98 kkh99 | none | word | morphological analysis | inverted file | word | Probabilistic model | Okapi | none | none |
brklypat3[result,desc] | 0.0560 | 0.0927 | auto | EN | ARTICLE SUPPLEMENT | kkh98 kkh99 | paj1995j.txt paj1996j.txt paj1997j.txt paj1995e.txt paj1996e.txt paj1997e.txt | bi-character | character analysis | inverted file | words in English queries, but bi-character in translated Japanese queryies. | probabilistic model | tf,dl,ql,cl | none | corpus-based |
sics1[result,desc] | 0.0003 | 0.0022 | manual | EN | ARTICLE SUPPLEMENT | kkh98 kkh99 | paj95 paj96 paj97 | word | morphological analysis | standard inquery | word | vector space model | standard inquery | gsmd | gsmd |