-
Allan, J.; Croft, W.B.; Callan, J.: ¬The University of Massachusetts and a dozen TRECs (2005)
0.02
0.024851443 = product of:
0.086980045 = sum of:
0.057986695 = weight(_text_:j in 5086) [ClassicSimilarity], result of:
0.057986695 = score(doc=5086,freq=4.0), product of:
0.09732894 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.030630698 = queryNorm
0.5957806 = fieldWeight in 5086, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.09375 = fieldNorm(doc=5086)
0.028993348 = product of:
0.057986695 = sum of:
0.057986695 = weight(_text_:j in 5086) [ClassicSimilarity], result of:
0.057986695 = score(doc=5086,freq=4.0), product of:
0.09732894 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.030630698 = queryNorm
0.5957806 = fieldWeight in 5086, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.09375 = fieldNorm(doc=5086)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
-
Robertson, S.; Callan, J.: Routing and filtering (2005)
0.02
0.020501394 = product of:
0.07175487 = sum of:
0.04783658 = weight(_text_:j in 4688) [ClassicSimilarity], result of:
0.04783658 = score(doc=4688,freq=2.0), product of:
0.09732894 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.030630698 = queryNorm
0.4914939 = fieldWeight in 4688, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.109375 = fieldNorm(doc=4688)
0.02391829 = product of:
0.04783658 = sum of:
0.04783658 = weight(_text_:j in 4688) [ClassicSimilarity], result of:
0.04783658 = score(doc=4688,freq=2.0), product of:
0.09732894 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.030630698 = queryNorm
0.4914939 = fieldWeight in 4688, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.109375 = fieldNorm(doc=4688)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
-
Blandford, A.; Adams, A.; Attfield, S.; Buchanan, G.; Gow, J.; Makri, S.; Rimmer, J.; Warwick, C.: ¬The PRET A Rapporter framework : evaluating digital libraries from the perspective of information work (2008)
0.01
0.012425722 = product of:
0.043490022 = sum of:
0.028993348 = weight(_text_:j in 2021) [ClassicSimilarity], result of:
0.028993348 = score(doc=2021,freq=4.0), product of:
0.09732894 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.030630698 = queryNorm
0.2978903 = fieldWeight in 2021, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.046875 = fieldNorm(doc=2021)
0.014496674 = product of:
0.028993348 = sum of:
0.028993348 = weight(_text_:j in 2021) [ClassicSimilarity], result of:
0.028993348 = score(doc=2021,freq=4.0), product of:
0.09732894 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.030630698 = queryNorm
0.2978903 = fieldWeight in 2021, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.046875 = fieldNorm(doc=2021)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
-
Bar-Ilan, J.: Methods for measuring search engine performance over time (2002)
0.01
0.0117150815 = product of:
0.041002784 = sum of:
0.02733519 = weight(_text_:j in 305) [ClassicSimilarity], result of:
0.02733519 = score(doc=305,freq=2.0), product of:
0.09732894 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.030630698 = queryNorm
0.28085366 = fieldWeight in 305, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.0625 = fieldNorm(doc=305)
0.013667595 = product of:
0.02733519 = sum of:
0.02733519 = weight(_text_:j in 305) [ClassicSimilarity], result of:
0.02733519 = score(doc=305,freq=2.0), product of:
0.09732894 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.030630698 = queryNorm
0.28085366 = fieldWeight in 305, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.0625 = fieldNorm(doc=305)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
-
Tague-Sutcliffe, J.: Information retrieval experimentation (2009)
0.01
0.0117150815 = product of:
0.041002784 = sum of:
0.02733519 = weight(_text_:j in 3801) [ClassicSimilarity], result of:
0.02733519 = score(doc=3801,freq=2.0), product of:
0.09732894 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.030630698 = queryNorm
0.28085366 = fieldWeight in 3801, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.0625 = fieldNorm(doc=3801)
0.013667595 = product of:
0.02733519 = sum of:
0.02733519 = weight(_text_:j in 3801) [ClassicSimilarity], result of:
0.02733519 = score(doc=3801,freq=2.0), product of:
0.09732894 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.030630698 = queryNorm
0.28085366 = fieldWeight in 3801, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.0625 = fieldNorm(doc=3801)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
-
Savoy, J.: Bibliographic database access using free-text and controlled vocabulary : an evaluation (2005)
0.01
0.010250697 = product of:
0.035877436 = sum of:
0.02391829 = weight(_text_:j in 1053) [ClassicSimilarity], result of:
0.02391829 = score(doc=1053,freq=2.0), product of:
0.09732894 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.030630698 = queryNorm
0.24574696 = fieldWeight in 1053, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.0546875 = fieldNorm(doc=1053)
0.011959145 = product of:
0.02391829 = sum of:
0.02391829 = weight(_text_:j in 1053) [ClassicSimilarity], result of:
0.02391829 = score(doc=1053,freq=2.0), product of:
0.09732894 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.030630698 = queryNorm
0.24574696 = fieldWeight in 1053, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.0546875 = fieldNorm(doc=1053)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
-
Bar-Ilan, J.: ¬The Web as an information source on informetrics? : A content analysis (2000)
0.01
0.008786311 = product of:
0.030752089 = sum of:
0.020501392 = weight(_text_:j in 4587) [ClassicSimilarity], result of:
0.020501392 = score(doc=4587,freq=2.0), product of:
0.09732894 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.030630698 = queryNorm
0.21064025 = fieldWeight in 4587, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.046875 = fieldNorm(doc=4587)
0.010250696 = product of:
0.020501392 = sum of:
0.020501392 = weight(_text_:j in 4587) [ClassicSimilarity], result of:
0.020501392 = score(doc=4587,freq=2.0), product of:
0.09732894 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.030630698 = queryNorm
0.21064025 = fieldWeight in 4587, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.046875 = fieldNorm(doc=4587)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
-
Serrano Cobos, J.; Quintero Orta, A.: Design, development and management of an information recovery system for an Internet Website : from documentary theory to practice (2003)
0.01
0.008786311 = product of:
0.030752089 = sum of:
0.020501392 = weight(_text_:j in 2726) [ClassicSimilarity], result of:
0.020501392 = score(doc=2726,freq=2.0), product of:
0.09732894 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.030630698 = queryNorm
0.21064025 = fieldWeight in 2726, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.046875 = fieldNorm(doc=2726)
0.010250696 = product of:
0.020501392 = sum of:
0.020501392 = weight(_text_:j in 2726) [ClassicSimilarity], result of:
0.020501392 = score(doc=2726,freq=2.0), product of:
0.09732894 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.030630698 = queryNorm
0.21064025 = fieldWeight in 2726, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.046875 = fieldNorm(doc=2726)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
-
Beall, J.; Kafadar, K.: Measuring typographical errors' impact on retrieval in bibliographic databases (2007)
0.01
0.008786311 = product of:
0.030752089 = sum of:
0.020501392 = weight(_text_:j in 261) [ClassicSimilarity], result of:
0.020501392 = score(doc=261,freq=2.0), product of:
0.09732894 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.030630698 = queryNorm
0.21064025 = fieldWeight in 261, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.046875 = fieldNorm(doc=261)
0.010250696 = product of:
0.020501392 = sum of:
0.020501392 = weight(_text_:j in 261) [ClassicSimilarity], result of:
0.020501392 = score(doc=261,freq=2.0), product of:
0.09732894 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.030630698 = queryNorm
0.21064025 = fieldWeight in 261, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.046875 = fieldNorm(doc=261)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
-
Savoy , J.: Cross-language information retrieval : experiments based an CLEF 2000 corpora (2003)
0.01
0.008786311 = product of:
0.030752089 = sum of:
0.020501392 = weight(_text_:j in 1034) [ClassicSimilarity], result of:
0.020501392 = score(doc=1034,freq=2.0), product of:
0.09732894 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.030630698 = queryNorm
0.21064025 = fieldWeight in 1034, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.046875 = fieldNorm(doc=1034)
0.010250696 = product of:
0.020501392 = sum of:
0.020501392 = weight(_text_:j in 1034) [ClassicSimilarity], result of:
0.020501392 = score(doc=1034,freq=2.0), product of:
0.09732894 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.030630698 = queryNorm
0.21064025 = fieldWeight in 1034, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.046875 = fieldNorm(doc=1034)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
-
López-Ostenero, F.; Peinado, V.; Gonzalo, J.; Verdejo, F.: Interactive question answering : Is Cross-Language harder than monolingual searching? (2008)
0.01
0.008786311 = product of:
0.030752089 = sum of:
0.020501392 = weight(_text_:j in 2023) [ClassicSimilarity], result of:
0.020501392 = score(doc=2023,freq=2.0), product of:
0.09732894 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.030630698 = queryNorm
0.21064025 = fieldWeight in 2023, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.046875 = fieldNorm(doc=2023)
0.010250696 = product of:
0.020501392 = sum of:
0.020501392 = weight(_text_:j in 2023) [ClassicSimilarity], result of:
0.020501392 = score(doc=2023,freq=2.0), product of:
0.09732894 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.030630698 = queryNorm
0.21064025 = fieldWeight in 2023, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.046875 = fieldNorm(doc=2023)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
-
Rokaya, M.; Atlam, E.; Fuketa, M.; Dorji, T.C.; Aoe, J.-i.: Ranking of field association terms using Co-word analysis (2008)
0.01
0.008786311 = product of:
0.030752089 = sum of:
0.020501392 = weight(_text_:j in 2060) [ClassicSimilarity], result of:
0.020501392 = score(doc=2060,freq=2.0), product of:
0.09732894 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.030630698 = queryNorm
0.21064025 = fieldWeight in 2060, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.046875 = fieldNorm(doc=2060)
0.010250696 = product of:
0.020501392 = sum of:
0.020501392 = weight(_text_:j in 2060) [ClassicSimilarity], result of:
0.020501392 = score(doc=2060,freq=2.0), product of:
0.09732894 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.030630698 = queryNorm
0.21064025 = fieldWeight in 2060, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.046875 = fieldNorm(doc=2060)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
-
Abdou, S.; Savoy, J.: Searching in Medline : query expansion and manual indexing evaluation (2008)
0.01
0.008786311 = product of:
0.030752089 = sum of:
0.020501392 = weight(_text_:j in 2062) [ClassicSimilarity], result of:
0.020501392 = score(doc=2062,freq=2.0), product of:
0.09732894 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.030630698 = queryNorm
0.21064025 = fieldWeight in 2062, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.046875 = fieldNorm(doc=2062)
0.010250696 = product of:
0.020501392 = sum of:
0.020501392 = weight(_text_:j in 2062) [ClassicSimilarity], result of:
0.020501392 = score(doc=2062,freq=2.0), product of:
0.09732894 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.030630698 = queryNorm
0.21064025 = fieldWeight in 2062, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.046875 = fieldNorm(doc=2062)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
-
Huang, M.-h.; Wang, H.-y.: ¬The influence of document presentation order and number of documents judged an users' judgments of relevance (2004)
0.01
0.00858336 = product of:
0.06008352 = sum of:
0.06008352 = product of:
0.12016704 = sum of:
0.12016704 = weight(_text_:huang in 2885) [ClassicSimilarity], result of:
0.12016704 = score(doc=2885,freq=2.0), product of:
0.21815723 = queryWeight, product of:
7.122176 = idf(docFreq=96, maxDocs=44218)
0.030630698 = queryNorm
0.5508277 = fieldWeight in 2885, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
7.122176 = idf(docFreq=96, maxDocs=44218)
0.0546875 = fieldNorm(doc=2885)
0.5 = coord(1/2)
0.14285715 = coord(1/7)
-
Hansen, P.; Karlgren, J.: Effects of foreign language and task scenario on relevance assessment (2005)
0.01
0.0073219254 = product of:
0.025626738 = sum of:
0.017084492 = weight(_text_:j in 4393) [ClassicSimilarity], result of:
0.017084492 = score(doc=4393,freq=2.0), product of:
0.09732894 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.030630698 = queryNorm
0.17553353 = fieldWeight in 4393, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.0390625 = fieldNorm(doc=4393)
0.008542246 = product of:
0.017084492 = sum of:
0.017084492 = weight(_text_:j in 4393) [ClassicSimilarity], result of:
0.017084492 = score(doc=4393,freq=2.0), product of:
0.09732894 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.030630698 = queryNorm
0.17553353 = fieldWeight in 4393, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.0390625 = fieldNorm(doc=4393)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
-
Kekäläinen, J.; Järvelin, K.: Using graded relevance assessments in IR evaluation (2002)
0.01
0.0073219254 = product of:
0.025626738 = sum of:
0.017084492 = weight(_text_:j in 5225) [ClassicSimilarity], result of:
0.017084492 = score(doc=5225,freq=2.0), product of:
0.09732894 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.030630698 = queryNorm
0.17553353 = fieldWeight in 5225, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.0390625 = fieldNorm(doc=5225)
0.008542246 = product of:
0.017084492 = sum of:
0.017084492 = weight(_text_:j in 5225) [ClassicSimilarity], result of:
0.017084492 = score(doc=5225,freq=2.0), product of:
0.09732894 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.030630698 = queryNorm
0.17553353 = fieldWeight in 5225, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.0390625 = fieldNorm(doc=5225)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
-
Talvensaari, T.; Laurikkala, J.; Järvelin, K.; Juhola, M.: ¬A study on automatic creation of a comparable document collection in cross-language information retrieval (2006)
0.01
0.0073219254 = product of:
0.025626738 = sum of:
0.017084492 = weight(_text_:j in 5601) [ClassicSimilarity], result of:
0.017084492 = score(doc=5601,freq=2.0), product of:
0.09732894 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.030630698 = queryNorm
0.17553353 = fieldWeight in 5601, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.0390625 = fieldNorm(doc=5601)
0.008542246 = product of:
0.017084492 = sum of:
0.017084492 = weight(_text_:j in 5601) [ClassicSimilarity], result of:
0.017084492 = score(doc=5601,freq=2.0), product of:
0.09732894 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.030630698 = queryNorm
0.17553353 = fieldWeight in 5601, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.0390625 = fieldNorm(doc=5601)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
-
Lioma, C.; Ounis, I.: ¬A syntactically-based query reformulation technique for information retrieval (2008)
0.01
0.0058575408 = product of:
0.020501392 = sum of:
0.013667595 = weight(_text_:j in 2031) [ClassicSimilarity], result of:
0.013667595 = score(doc=2031,freq=2.0), product of:
0.09732894 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.030630698 = queryNorm
0.14042683 = fieldWeight in 2031, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.03125 = fieldNorm(doc=2031)
0.0068337973 = product of:
0.013667595 = sum of:
0.013667595 = weight(_text_:j in 2031) [ClassicSimilarity], result of:
0.013667595 = score(doc=2031,freq=2.0), product of:
0.09732894 = queryWeight, product of:
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.030630698 = queryNorm
0.14042683 = fieldWeight in 2031, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1774964 = idf(docFreq=5010, maxDocs=44218)
0.03125 = fieldNorm(doc=2031)
0.5 = coord(1/2)
0.2857143 = coord(2/7)
- Abstract
- Whereas in language words of high frequency are generally associated with low content [Bookstein, A., & Swanson, D. (1974). Probabilistic models for automatic indexing. Journal of the American Society of Information Science, 25(5), 312-318; Damerau, F. J. (1965). An experiment in automatic indexing. American Documentation, 16, 283-289; Harter, S. P. (1974). A probabilistic approach to automatic keyword indexing. PhD thesis, University of Chicago; Sparck-Jones, K. (1972). A statistical interpretation of term specificity and its application in retrieval. Journal of Documentation, 28, 11-21; Yu, C., & Salton, G. (1976). Precision weighting - an effective automatic indexing method. Journal of the Association for Computer Machinery (ACM), 23(1), 76-88], shallow syntactic fragments of high frequency generally correspond to lexical fragments of high content [Lioma, C., & Ounis, I. (2006). Examining the content load of part of speech blocks for information retrieval. In Proceedings of the international committee on computational linguistics and the association for computational linguistics (COLING/ACL 2006), Sydney, Australia]. We implement this finding to Information Retrieval, as follows. We present a novel automatic query reformulation technique, which is based on shallow syntactic evidence induced from various language samples, and used to enhance the performance of an Information Retrieval system. Firstly, we draw shallow syntactic evidence from language samples of varying size, and compare the effect of language sample size upon retrieval performance, when using our syntactically-based query reformulation (SQR) technique. Secondly, we compare SQR to a state-of-the-art probabilistic pseudo-relevance feedback technique. Additionally, we combine both techniques and evaluate their compatibility. We evaluate our proposed technique across two standard Text REtrieval Conference (TREC) English test collections, and three statistically different weighting models. Experimental results suggest that SQR markedly enhances retrieval performance, and is at least comparable to pseudo-relevance feedback. Notably, the combination of SQR and pseudo-relevance feedback further enhances retrieval performance considerably. These collective experimental results confirm the tenet that high frequency shallow syntactic fragments correspond to content-bearing lexical fragments.
-
Voorhees, E.M.; Harman, D.: Overview of the Sixth Text REtrieval Conference (TREC-6) (2000)
0.00
0.004150037 = product of:
0.029050259 = sum of:
0.029050259 = product of:
0.058100518 = sum of:
0.058100518 = weight(_text_:22 in 6438) [ClassicSimilarity], result of:
0.058100518 = score(doc=6438,freq=2.0), product of:
0.10726349 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.030630698 = queryNorm
0.5416616 = fieldWeight in 6438, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.109375 = fieldNorm(doc=6438)
0.5 = coord(1/2)
0.14285715 = coord(1/7)
- Date
- 11. 8.2001 16:22:19
-
Leininger, K.: Interindexer consistency in PsychINFO (2000)
0.00
0.0017785872 = product of:
0.01245011 = sum of:
0.01245011 = product of:
0.02490022 = sum of:
0.02490022 = weight(_text_:22 in 2552) [ClassicSimilarity], result of:
0.02490022 = score(doc=2552,freq=2.0), product of:
0.10726349 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.030630698 = queryNorm
0.23214069 = fieldWeight in 2552, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.046875 = fieldNorm(doc=2552)
0.5 = coord(1/2)
0.14285715 = coord(1/7)
- Date
- 9. 2.1997 18:44:22
