Document (#14872)

Author
Smith, M.P.
Pollitt, S.A.
Title
¬A comparison of ranking formulae and their ranks
Source
New review of document and text management. 1995, no.1, S.85-100
Year
1995
Abstract
Reports a study to compare the ranking produced by several well known probabilistic formulae. Values for the variables used in these formulae (collection frequency for a query term, number of relevant documents retrieved, and number of relevant documents retrieved, and number of relevant documents indexed by the query term) were derived using a random number generator, the number of documents in the collection was fixed at 500.000. This produced ranked bands for each formula using document term characteristics rather than actual documents. These rankings were compared with one another using the Spearman Rho ranked correlation co-efficient to determine how closely the algorithms rank documents. There is little difference in the rankings produced by the Expected Mutual Information measure EMIM and the simpler F4.5 weighting scheme
Theme
Retrievalalgorithmen

Similar documents (author)

  1. Smith, M.P.; Pollitt, A.S.: Ranking and relevance feedback extensions to a view-based searching system (1995) 5.27 
    5.2717843 = sum of:
  5.2717843 = sum of:
    1.6300079 = weight(author_txt:smith in 3855) [ClassicSimilarity], result of:
      1.6300079 = score(doc=3855,freq=1.0), product of:
        0.50502634 = queryWeight, product of:
          6.45514 = idf(docFreq=188, maxDocs=44218)
          0.07823631 = queryNorm
        3.22757 = fieldWeight in 3855, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          6.45514 = idf(docFreq=188, maxDocs=44218)
          0.5 = fieldNorm(doc=3855)
    3.6417766 = weight(author_txt:pollitt in 3855) [ClassicSimilarity], result of:
      3.6417766 = score(doc=3855,freq=1.0), product of:
        0.8631039 = queryWeight, product of:
          1.3072978 = boost
          8.43879 = idf(docFreq=25, maxDocs=44218)
          0.07823631 = queryNorm
        4.219395 = fieldWeight in 3855, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          8.43879 = idf(docFreq=25, maxDocs=44218)
          0.5 = fieldNorm(doc=3855)
  2. Smith, M.P.; Pollitt, A.S.: ¬The potential for incorporating document ranking in the MenUSE front-end search internemdiary system (1996) 5.27 
    5.2717843 = sum of:
  5.2717843 = sum of:
    1.6300079 = weight(author_txt:smith in 6980) [ClassicSimilarity], result of:
      1.6300079 = score(doc=6980,freq=1.0), product of:
        0.50502634 = queryWeight, product of:
          6.45514 = idf(docFreq=188, maxDocs=44218)
          0.07823631 = queryNorm
        3.22757 = fieldWeight in 6980, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          6.45514 = idf(docFreq=188, maxDocs=44218)
          0.5 = fieldNorm(doc=6980)
    3.6417766 = weight(author_txt:pollitt in 6980) [ClassicSimilarity], result of:
      3.6417766 = score(doc=6980,freq=1.0), product of:
        0.8631039 = queryWeight, product of:
          1.3072978 = boost
          8.43879 = idf(docFreq=25, maxDocs=44218)
          0.07823631 = queryNorm
        4.219395 = fieldWeight in 6980, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          8.43879 = idf(docFreq=25, maxDocs=44218)
          0.5 = fieldNorm(doc=6980)
  3. Pollitt, A.S.; Ellis, G.P.; Smith, M.P.: HIBROWSE for bibliographic databases (1994) 3.95 
    3.9538383 = sum of:
  3.9538383 = sum of:
    1.2225059 = weight(author_txt:smith in 1069) [ClassicSimilarity], result of:
      1.2225059 = score(doc=1069,freq=1.0), product of:
        0.50502634 = queryWeight, product of:
          6.45514 = idf(docFreq=188, maxDocs=44218)
          0.07823631 = queryNorm
        2.4206777 = fieldWeight in 1069, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          6.45514 = idf(docFreq=188, maxDocs=44218)
          0.375 = fieldNorm(doc=1069)
    2.7313325 = weight(author_txt:pollitt in 1069) [ClassicSimilarity], result of:
      2.7313325 = score(doc=1069,freq=1.0), product of:
        0.8631039 = queryWeight, product of:
          1.3072978 = boost
          8.43879 = idf(docFreq=25, maxDocs=44218)
          0.07823631 = queryNorm
        3.1645465 = fieldWeight in 1069, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          8.43879 = idf(docFreq=25, maxDocs=44218)
          0.375 = fieldNorm(doc=1069)
  4. Pollitt, A.S.; Smith, M.P.; Ellis, G.P.: Peek-a-boo revived : end-user searching of bibliographic databases using filtering views (1994) 3.95 
    3.9538383 = sum of:
  3.9538383 = sum of:
    1.2225059 = weight(author_txt:smith in 1937) [ClassicSimilarity], result of:
      1.2225059 = score(doc=1937,freq=1.0), product of:
        0.50502634 = queryWeight, product of:
          6.45514 = idf(docFreq=188, maxDocs=44218)
          0.07823631 = queryNorm
        2.4206777 = fieldWeight in 1937, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          6.45514 = idf(docFreq=188, maxDocs=44218)
          0.375 = fieldNorm(doc=1937)
    2.7313325 = weight(author_txt:pollitt in 1937) [ClassicSimilarity], result of:
      2.7313325 = score(doc=1937,freq=1.0), product of:
        0.8631039 = queryWeight, product of:
          1.3072978 = boost
          8.43879 = idf(docFreq=25, maxDocs=44218)
          0.07823631 = queryNorm
        3.1645465 = fieldWeight in 1937, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          8.43879 = idf(docFreq=25, maxDocs=44218)
          0.375 = fieldNorm(doc=1937)
  5. Pollitt, A.S.; Ellis, G.P.; Smith, M.P.; Li, C.S.: HIBROWSE: adding the power of relational databases to the traditional IR architecture : the future for Graphic User Interfaces (1994) 3.29 
    3.2948651 = sum of:
  3.2948651 = sum of:
    1.018755 = weight(author_txt:smith in 2732) [ClassicSimilarity], result of:
      1.018755 = score(doc=2732,freq=1.0), product of:
        0.50502634 = queryWeight, product of:
          6.45514 = idf(docFreq=188, maxDocs=44218)
          0.07823631 = queryNorm
        2.0172312 = fieldWeight in 2732, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          6.45514 = idf(docFreq=188, maxDocs=44218)
          0.3125 = fieldNorm(doc=2732)
    2.2761102 = weight(author_txt:pollitt in 2732) [ClassicSimilarity], result of:
      2.2761102 = score(doc=2732,freq=1.0), product of:
        0.8631039 = queryWeight, product of:
          1.3072978 = boost
          8.43879 = idf(docFreq=25, maxDocs=44218)
          0.07823631 = queryNorm
        2.637122 = fieldWeight in 2732, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          8.43879 = idf(docFreq=25, maxDocs=44218)
          0.3125 = fieldNorm(doc=2732)

Similar documents (content)

  1. Ruthven, I.; Lalmas, M.; Rijsbergen, K. van: Combining and selecting characteristics of information use (2002) 0.36 
    0.3622798 = sum of:
  0.3622798 = product of:
    0.7547496 = sum of:
      0.058278337 = weight(abstract_txt:weighting in 5208) [ClassicSimilarity], result of:
        0.058278337 = score(doc=5208,freq=2.0), product of:
          0.1259783 = queryWeight, product of:
            1.0478164 = boost
            6.9783883 = idf(docFreq=111, maxDocs=44218)
            0.017228816 = queryNorm
          0.46260613 = fieldWeight in 5208, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            6.9783883 = idf(docFreq=111, maxDocs=44218)
            0.046875 = fieldNorm(doc=5208)
      0.011988851 = weight(abstract_txt:were in 5208) [ClassicSimilarity], result of:
        0.011988851 = score(doc=5208,freq=1.0), product of:
          0.06968875 = queryWeight, product of:
            1.1021321 = boost
            3.6700637 = idf(docFreq=3061, maxDocs=44218)
            0.017228816 = queryNorm
          0.17203423 = fieldWeight in 5208, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            3.6700637 = idf(docFreq=3061, maxDocs=44218)
            0.046875 = fieldNorm(doc=5208)
      0.052938 = weight(abstract_txt:ranks in 5208) [ClassicSimilarity], result of:
        0.052938 = score(doc=5208,freq=1.0), product of:
          0.14887187 = queryWeight, product of:
            1.1390523 = boost
            7.5860133 = idf(docFreq=60, maxDocs=44218)
            0.017228816 = queryNorm
          0.35559437 = fieldWeight in 5208, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            7.5860133 = idf(docFreq=60, maxDocs=44218)
            0.046875 = fieldNorm(doc=5208)
      0.024361026 = weight(abstract_txt:collection in 5208) [ClassicSimilarity], result of:
        0.024361026 = score(doc=5208,freq=1.0), product of:
          0.11179988 = queryWeight, product of:
            1.39596 = boost
            4.648501 = idf(docFreq=1150, maxDocs=44218)
            0.017228816 = queryNorm
          0.21789849 = fieldWeight in 5208, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.648501 = idf(docFreq=1150, maxDocs=44218)
            0.046875 = fieldNorm(doc=5208)
      0.06893167 = weight(abstract_txt:query in 5208) [ClassicSimilarity], result of:
        0.06893167 = score(doc=5208,freq=7.0), product of:
          0.11692054 = queryWeight, product of:
            1.4275709 = boost
            4.7537646 = idf(docFreq=1035, maxDocs=44218)
            0.017228816 = queryNorm
          0.58956 = fieldWeight in 5208, product of:
            2.6457512 = tf(freq=7.0), with freq of:
              7.0 = termFreq=7.0
            4.7537646 = idf(docFreq=1035, maxDocs=44218)
            0.046875 = fieldNorm(doc=5208)
      0.015109499 = weight(abstract_txt:using in 5208) [ClassicSimilarity], result of:
        0.015109499 = score(doc=5208,freq=1.0), product of:
          0.093076795 = queryWeight, product of:
            1.5599786 = boost
            3.4631186 = idf(docFreq=3765, maxDocs=44218)
            0.017228816 = queryNorm
          0.16233368 = fieldWeight in 5208, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            3.4631186 = idf(docFreq=3765, maxDocs=44218)
            0.046875 = fieldNorm(doc=5208)
      0.060194887 = weight(abstract_txt:ranking in 5208) [ClassicSimilarity], result of:
        0.060194887 = score(doc=5208,freq=2.0), product of:
          0.16218376 = queryWeight, product of:
            1.6813418 = boost
            5.598813 = idf(docFreq=444, maxDocs=44218)
            0.017228816 = queryNorm
          0.37115237 = fieldWeight in 5208, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            5.598813 = idf(docFreq=444, maxDocs=44218)
            0.046875 = fieldNorm(doc=5208)
      0.09092129 = weight(abstract_txt:ranked in 5208) [ClassicSimilarity], result of:
        0.09092129 = score(doc=5208,freq=2.0), product of:
          0.21350662 = queryWeight, product of:
            1.9291143 = boost
            6.4238877 = idf(docFreq=194, maxDocs=44218)
            0.017228816 = queryNorm
          0.42584762 = fieldWeight in 5208, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            6.4238877 = idf(docFreq=194, maxDocs=44218)
            0.046875 = fieldNorm(doc=5208)
      0.079142965 = weight(abstract_txt:rankings in 5208) [ClassicSimilarity], result of:
        0.079142965 = score(doc=5208,freq=1.0), product of:
          0.24523692 = queryWeight, product of:
            2.0674987 = boost
            6.8847027 = idf(docFreq=122, maxDocs=44218)
            0.017228816 = queryNorm
          0.32272044 = fieldWeight in 5208, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            6.8847027 = idf(docFreq=122, maxDocs=44218)
            0.046875 = fieldNorm(doc=5208)
      0.072474055 = weight(abstract_txt:relevant in 5208) [ClassicSimilarity], result of:
        0.072474055 = score(doc=5208,freq=4.0), product of:
          0.16676687 = queryWeight, product of:
            2.0881073 = boost
            4.635553 = idf(docFreq=1165, maxDocs=44218)
            0.017228816 = queryNorm
          0.43458307 = fieldWeight in 5208, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            4.635553 = idf(docFreq=1165, maxDocs=44218)
            0.046875 = fieldNorm(doc=5208)
      0.10652405 = weight(abstract_txt:term in 5208) [ClassicSimilarity], result of:
        0.10652405 = score(doc=5208,freq=7.0), product of:
          0.17889869 = queryWeight, product of:
            2.1627262 = boost
            4.8012047 = idf(docFreq=987, maxDocs=44218)
            0.017228816 = queryNorm
          0.5954434 = fieldWeight in 5208, product of:
            2.6457512 = tf(freq=7.0), with freq of:
              7.0 = termFreq=7.0
            4.8012047 = idf(docFreq=987, maxDocs=44218)
            0.046875 = fieldNorm(doc=5208)
      0.11388499 = weight(abstract_txt:documents in 5208) [ClassicSimilarity], result of:
        0.11388499 = score(doc=5208,freq=5.0), product of:
          0.2636366 = queryWeight, product of:
            3.7129216 = boost
            4.1213026 = idf(docFreq=1949, maxDocs=44218)
            0.017228816 = queryNorm
          0.43197718 = fieldWeight in 5208, product of:
            2.236068 = tf(freq=5.0), with freq of:
              5.0 = termFreq=5.0
            4.1213026 = idf(docFreq=1949, maxDocs=44218)
            0.046875 = fieldNorm(doc=5208)
    0.48 = coord(12/25)
  2. Smith, M.P.; Pollitt, A.S.: Ranking and relevance feedback extensions to a view-based searching system (1995) 0.27 
    0.2732415 = sum of:
  0.2732415 = product of:
    0.7590041 = sum of:
      0.0629028 = weight(abstract_txt:probabilistic in 3855) [ClassicSimilarity], result of:
        0.0629028 = score(doc=3855,freq=1.0), product of:
          0.11880876 = queryWeight, product of:
            1.0175636 = boost
            6.7769065 = idf(docFreq=136, maxDocs=44218)
            0.017228816 = queryNorm
          0.5294458 = fieldWeight in 3855, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            6.7769065 = idf(docFreq=136, maxDocs=44218)
            0.078125 = fieldNorm(doc=3855)
      0.01998142 = weight(abstract_txt:were in 3855) [ClassicSimilarity], result of:
        0.01998142 = score(doc=3855,freq=1.0), product of:
          0.06968875 = queryWeight, product of:
            1.1021321 = boost
            3.6700637 = idf(docFreq=3061, maxDocs=44218)
            0.017228816 = queryNorm
          0.28672373 = fieldWeight in 3855, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            3.6700637 = idf(docFreq=3061, maxDocs=44218)
            0.078125 = fieldNorm(doc=3855)
      0.04342287 = weight(abstract_txt:query in 3855) [ClassicSimilarity], result of:
        0.04342287 = score(doc=3855,freq=1.0), product of:
          0.11692054 = queryWeight, product of:
            1.4275709 = boost
            4.7537646 = idf(docFreq=1035, maxDocs=44218)
            0.017228816 = queryNorm
          0.37138787 = fieldWeight in 3855, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.7537646 = idf(docFreq=1035, maxDocs=44218)
            0.078125 = fieldNorm(doc=3855)
      0.0251825 = weight(abstract_txt:using in 3855) [ClassicSimilarity], result of:
        0.0251825 = score(doc=3855,freq=1.0), product of:
          0.093076795 = queryWeight, product of:
            1.5599786 = boost
            3.4631186 = idf(docFreq=3765, maxDocs=44218)
            0.017228816 = queryNorm
          0.27055615 = fieldWeight in 3855, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            3.4631186 = idf(docFreq=3765, maxDocs=44218)
            0.078125 = fieldNorm(doc=3855)
      0.10032481 = weight(abstract_txt:ranking in 3855) [ClassicSimilarity], result of:
        0.10032481 = score(doc=3855,freq=2.0), product of:
          0.16218376 = queryWeight, product of:
            1.6813418 = boost
            5.598813 = idf(docFreq=444, maxDocs=44218)
            0.017228816 = queryNorm
          0.61858726 = fieldWeight in 3855, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            5.598813 = idf(docFreq=444, maxDocs=44218)
            0.078125 = fieldNorm(doc=3855)
      0.10715176 = weight(abstract_txt:ranked in 3855) [ClassicSimilarity], result of:
        0.10715176 = score(doc=3855,freq=1.0), product of:
          0.21350662 = queryWeight, product of:
            1.9291143 = boost
            6.4238877 = idf(docFreq=194, maxDocs=44218)
            0.017228816 = queryNorm
          0.5018662 = fieldWeight in 3855, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            6.4238877 = idf(docFreq=194, maxDocs=44218)
            0.078125 = fieldNorm(doc=3855)
      0.1207901 = weight(abstract_txt:relevant in 3855) [ClassicSimilarity], result of:
        0.1207901 = score(doc=3855,freq=4.0), product of:
          0.16676687 = queryWeight, product of:
            2.0881073 = boost
            4.635553 = idf(docFreq=1165, maxDocs=44218)
            0.017228816 = queryNorm
          0.72430515 = fieldWeight in 3855, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            4.635553 = idf(docFreq=1165, maxDocs=44218)
            0.078125 = fieldNorm(doc=3855)
      0.07132323 = weight(abstract_txt:number in 3855) [ClassicSimilarity], result of:
        0.07132323 = score(doc=3855,freq=1.0), product of:
          0.22090852 = queryWeight, product of:
            3.1026196 = boost
            4.132649 = idf(docFreq=1927, maxDocs=44218)
            0.017228816 = queryNorm
          0.3228632 = fieldWeight in 3855, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.132649 = idf(docFreq=1927, maxDocs=44218)
            0.078125 = fieldNorm(doc=3855)
      0.20792459 = weight(abstract_txt:documents in 3855) [ClassicSimilarity], result of:
        0.20792459 = score(doc=3855,freq=6.0), product of:
          0.2636366 = queryWeight, product of:
            3.7129216 = boost
            4.1213026 = idf(docFreq=1949, maxDocs=44218)
            0.017228816 = queryNorm
          0.7886788 = fieldWeight in 3855, product of:
            2.4494898 = tf(freq=6.0), with freq of:
              6.0 = termFreq=6.0
            4.1213026 = idf(docFreq=1949, maxDocs=44218)
            0.078125 = fieldNorm(doc=3855)
    0.36 = coord(9/25)
  3. Crouch, C.J.; Crouch, D.B.; Chen, Q.; Holtz, S.J.: Improving the retrieval effectiveness of very short queries (2002) 0.26 
    0.26292902 = sum of:
  0.26292902 = product of:
    0.6573225 = sum of:
      0.07770445 = weight(abstract_txt:weighting in 2572) [ClassicSimilarity], result of:
        0.07770445 = score(doc=2572,freq=2.0), product of:
          0.1259783 = queryWeight, product of:
            1.0478164 = boost
            6.9783883 = idf(docFreq=111, maxDocs=44218)
            0.017228816 = queryNorm
          0.6168082 = fieldWeight in 2572, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            6.9783883 = idf(docFreq=111, maxDocs=44218)
            0.0625 = fieldNorm(doc=2572)
      0.015985135 = weight(abstract_txt:were in 2572) [ClassicSimilarity], result of:
        0.015985135 = score(doc=2572,freq=1.0), product of:
          0.06968875 = queryWeight, product of:
            1.1021321 = boost
            3.6700637 = idf(docFreq=3061, maxDocs=44218)
            0.017228816 = queryNorm
          0.22937898 = fieldWeight in 2572, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            3.6700637 = idf(docFreq=3061, maxDocs=44218)
            0.0625 = fieldNorm(doc=2572)
      0.070584 = weight(abstract_txt:ranks in 2572) [ClassicSimilarity], result of:
        0.070584 = score(doc=2572,freq=1.0), product of:
          0.14887187 = queryWeight, product of:
            1.1390523 = boost
            7.5860133 = idf(docFreq=60, maxDocs=44218)
            0.017228816 = queryNorm
          0.47412583 = fieldWeight in 2572, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            7.5860133 = idf(docFreq=60, maxDocs=44218)
            0.0625 = fieldNorm(doc=2572)
      0.032481365 = weight(abstract_txt:collection in 2572) [ClassicSimilarity], result of:
        0.032481365 = score(doc=2572,freq=1.0), product of:
          0.11179988 = queryWeight, product of:
            1.39596 = boost
            4.648501 = idf(docFreq=1150, maxDocs=44218)
            0.017228816 = queryNorm
          0.2905313 = fieldWeight in 2572, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.648501 = idf(docFreq=1150, maxDocs=44218)
            0.0625 = fieldNorm(doc=2572)
      0.049127366 = weight(abstract_txt:query in 2572) [ClassicSimilarity], result of:
        0.049127366 = score(doc=2572,freq=2.0), product of:
          0.11692054 = queryWeight, product of:
            1.4275709 = boost
            4.7537646 = idf(docFreq=1035, maxDocs=44218)
            0.017228816 = queryNorm
          0.4201774 = fieldWeight in 2572, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            4.7537646 = idf(docFreq=1035, maxDocs=44218)
            0.0625 = fieldNorm(doc=2572)
      0.028490745 = weight(abstract_txt:using in 2572) [ClassicSimilarity], result of:
        0.028490745 = score(doc=2572,freq=2.0), product of:
          0.093076795 = queryWeight, product of:
            1.5599786 = boost
            3.4631186 = idf(docFreq=3765, maxDocs=44218)
            0.017228816 = queryNorm
          0.30609933 = fieldWeight in 2572, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.4631186 = idf(docFreq=3765, maxDocs=44218)
            0.0625 = fieldNorm(doc=2572)
      0.08368583 = weight(abstract_txt:relevant in 2572) [ClassicSimilarity], result of:
        0.08368583 = score(doc=2572,freq=3.0), product of:
          0.16676687 = queryWeight, product of:
            2.0881073 = boost
            4.635553 = idf(docFreq=1165, maxDocs=44218)
            0.017228816 = queryNorm
          0.5018133 = fieldWeight in 2572, product of:
            1.7320508 = tf(freq=3.0), with freq of:
              3.0 = termFreq=3.0
            4.635553 = idf(docFreq=1165, maxDocs=44218)
            0.0625 = fieldNorm(doc=2572)
      0.082754806 = weight(abstract_txt:produced in 2572) [ClassicSimilarity], result of:
        0.082754806 = score(doc=2572,freq=1.0), product of:
          0.23873223 = queryWeight, product of:
            2.498351 = boost
            5.5462847 = idf(docFreq=468, maxDocs=44218)
            0.017228816 = queryNorm
          0.3466428 = fieldWeight in 2572, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.5462847 = idf(docFreq=468, maxDocs=44218)
            0.0625 = fieldNorm(doc=2572)
      0.08069302 = weight(abstract_txt:number in 2572) [ClassicSimilarity], result of:
        0.08069302 = score(doc=2572,freq=2.0), product of:
          0.22090852 = queryWeight, product of:
            3.1026196 = boost
            4.132649 = idf(docFreq=1927, maxDocs=44218)
            0.017228816 = queryNorm
          0.365278 = fieldWeight in 2572, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            4.132649 = idf(docFreq=1927, maxDocs=44218)
            0.0625 = fieldNorm(doc=2572)
      0.13581577 = weight(abstract_txt:documents in 2572) [ClassicSimilarity], result of:
        0.13581577 = score(doc=2572,freq=4.0), product of:
          0.2636366 = queryWeight, product of:
            3.7129216 = boost
            4.1213026 = idf(docFreq=1949, maxDocs=44218)
            0.017228816 = queryNorm
          0.5151628 = fieldWeight in 2572, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            4.1213026 = idf(docFreq=1949, maxDocs=44218)
            0.0625 = fieldNorm(doc=2572)
    0.4 = coord(10/25)
  4. Efthimiadis, E.N.: Interactive query expansion : a user-based evaluation in a relevance feedback environment (2000) 0.22 
    0.22241737 = sum of:
  0.22241737 = product of:
    0.617826 = sum of:
      0.03127587 = weight(abstract_txt:were in 5701) [ClassicSimilarity], result of:
        0.03127587 = score(doc=5701,freq=5.0), product of:
          0.06968875 = queryWeight, product of:
            1.1021321 = boost
            3.6700637 = idf(docFreq=3061, maxDocs=44218)
            0.017228816 = queryNorm
          0.44879365 = fieldWeight in 5701, product of:
            2.236068 = tf(freq=5.0), with freq of:
              5.0 = termFreq=5.0
            3.6700637 = idf(docFreq=3061, maxDocs=44218)
            0.0546875 = fieldNorm(doc=5701)
      0.028421193 = weight(abstract_txt:collection in 5701) [ClassicSimilarity], result of:
        0.028421193 = score(doc=5701,freq=1.0), product of:
          0.11179988 = queryWeight, product of:
            1.39596 = boost
            4.648501 = idf(docFreq=1150, maxDocs=44218)
            0.017228816 = queryNorm
          0.25421488 = fieldWeight in 5701, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.648501 = idf(docFreq=1150, maxDocs=44218)
            0.0546875 = fieldNorm(doc=5701)
      0.12532595 = weight(abstract_txt:query in 5701) [ClassicSimilarity], result of:
        0.12532595 = score(doc=5701,freq=17.0), product of:
          0.11692054 = queryWeight, product of:
            1.4275709 = boost
            4.7537646 = idf(docFreq=1035, maxDocs=44218)
            0.017228816 = queryNorm
          1.0718899 = fieldWeight in 5701, product of:
            4.1231055 = tf(freq=17.0), with freq of:
              17.0 = termFreq=17.0
            4.7537646 = idf(docFreq=1035, maxDocs=44218)
            0.0546875 = fieldNorm(doc=5701)
      0.017627748 = weight(abstract_txt:using in 5701) [ClassicSimilarity], result of:
        0.017627748 = score(doc=5701,freq=1.0), product of:
          0.093076795 = queryWeight, product of:
            1.5599786 = boost
            3.4631186 = idf(docFreq=3765, maxDocs=44218)
            0.017228816 = queryNorm
          0.18938929 = fieldWeight in 5701, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            3.4631186 = idf(docFreq=3765, maxDocs=44218)
            0.0546875 = fieldNorm(doc=5701)
      0.07500623 = weight(abstract_txt:ranked in 5701) [ClassicSimilarity], result of:
        0.07500623 = score(doc=5701,freq=1.0), product of:
          0.21350662 = queryWeight, product of:
            1.9291143 = boost
            6.4238877 = idf(docFreq=194, maxDocs=44218)
            0.017228816 = queryNorm
          0.35130635 = fieldWeight in 5701, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            6.4238877 = idf(docFreq=194, maxDocs=44218)
            0.0546875 = fieldNorm(doc=5701)
      0.05978805 = weight(abstract_txt:relevant in 5701) [ClassicSimilarity], result of:
        0.05978805 = score(doc=5701,freq=2.0), product of:
          0.16676687 = queryWeight, product of:
            2.0881073 = boost
            4.635553 = idf(docFreq=1165, maxDocs=44218)
            0.017228816 = queryNorm
          0.35851276 = fieldWeight in 5701, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            4.635553 = idf(docFreq=1165, maxDocs=44218)
            0.0546875 = fieldNorm(doc=5701)
      0.093945384 = weight(abstract_txt:term in 5701) [ClassicSimilarity], result of:
        0.093945384 = score(doc=5701,freq=4.0), product of:
          0.17889869 = queryWeight, product of:
            2.1627262 = boost
            4.8012047 = idf(docFreq=987, maxDocs=44218)
            0.017228816 = queryNorm
          0.52513176 = fieldWeight in 5701, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            4.8012047 = idf(docFreq=987, maxDocs=44218)
            0.0546875 = fieldNorm(doc=5701)
      0.10240385 = weight(abstract_txt:produced in 5701) [ClassicSimilarity], result of:
        0.10240385 = score(doc=5701,freq=2.0), product of:
          0.23873223 = queryWeight, product of:
            2.498351 = boost
            5.5462847 = idf(docFreq=468, maxDocs=44218)
            0.017228816 = queryNorm
          0.42894855 = fieldWeight in 5701, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            5.5462847 = idf(docFreq=468, maxDocs=44218)
            0.0546875 = fieldNorm(doc=5701)
      0.084031716 = weight(abstract_txt:documents in 5701) [ClassicSimilarity], result of:
        0.084031716 = score(doc=5701,freq=2.0), product of:
          0.2636366 = queryWeight, product of:
            3.7129216 = boost
            4.1213026 = idf(docFreq=1949, maxDocs=44218)
            0.017228816 = queryNorm
          0.31874073 = fieldWeight in 5701, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            4.1213026 = idf(docFreq=1949, maxDocs=44218)
            0.0546875 = fieldNorm(doc=5701)
    0.36 = coord(9/25)
  5. López-Pujalte, C.; Guerrero-Bote, V.P.; Moya-Anegón, F. de: Order-based fitness functions for genetic algorithms applied to relevance feedback (2003) 0.22 
    0.22148997 = sum of:
  0.22148997 = product of:
    0.6152499 = sum of:
      0.07528684 = weight(abstract_txt:fixed in 5154) [ClassicSimilarity], result of:
        0.07528684 = score(doc=5154,freq=2.0), product of:
          0.13483599 = queryWeight, product of:
            1.0840273 = boost
            7.2195506 = idf(docFreq=87, maxDocs=44218)
            0.017228816 = queryNorm
          0.55835867 = fieldWeight in 5154, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            7.2195506 = idf(docFreq=87, maxDocs=44218)
            0.0546875 = fieldNorm(doc=5154)
      0.019780595 = weight(abstract_txt:were in 5154) [ClassicSimilarity], result of:
        0.019780595 = score(doc=5154,freq=2.0), product of:
          0.06968875 = queryWeight, product of:
            1.1021321 = boost
            3.6700637 = idf(docFreq=3061, maxDocs=44218)
            0.017228816 = queryNorm
          0.283842 = fieldWeight in 5154, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.6700637 = idf(docFreq=3061, maxDocs=44218)
            0.0546875 = fieldNorm(doc=5154)
      0.040193636 = weight(abstract_txt:collection in 5154) [ClassicSimilarity], result of:
        0.040193636 = score(doc=5154,freq=2.0), product of:
          0.11179988 = queryWeight, product of:
            1.39596 = boost
            4.648501 = idf(docFreq=1150, maxDocs=44218)
            0.017228816 = queryNorm
          0.35951412 = fieldWeight in 5154, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            4.648501 = idf(docFreq=1150, maxDocs=44218)
            0.0546875 = fieldNorm(doc=5154)
      0.030396007 = weight(abstract_txt:query in 5154) [ClassicSimilarity], result of:
        0.030396007 = score(doc=5154,freq=1.0), product of:
          0.11692054 = queryWeight, product of:
            1.4275709 = boost
            4.7537646 = idf(docFreq=1035, maxDocs=44218)
            0.017228816 = queryNorm
          0.2599715 = fieldWeight in 5154, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.7537646 = idf(docFreq=1035, maxDocs=44218)
            0.0546875 = fieldNorm(doc=5154)
      0.0249294 = weight(abstract_txt:using in 5154) [ClassicSimilarity], result of:
        0.0249294 = score(doc=5154,freq=2.0), product of:
          0.093076795 = queryWeight, product of:
            1.5599786 = boost
            3.4631186 = idf(docFreq=3765, maxDocs=44218)
            0.017228816 = queryNorm
          0.2678369 = fieldWeight in 5154, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.4631186 = idf(docFreq=3765, maxDocs=44218)
            0.0546875 = fieldNorm(doc=5154)
      0.105237015 = weight(abstract_txt:retrieved in 5154) [ClassicSimilarity], result of:
        0.105237015 = score(doc=5154,freq=4.0), product of:
          0.16856682 = queryWeight, product of:
            1.7141087 = boost
            5.707926 = idf(docFreq=398, maxDocs=44218)
            0.017228816 = queryNorm
          0.6243044 = fieldWeight in 5154, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            5.707926 = idf(docFreq=398, maxDocs=44218)
            0.0546875 = fieldNorm(doc=5154)
      0.08455307 = weight(abstract_txt:relevant in 5154) [ClassicSimilarity], result of:
        0.08455307 = score(doc=5154,freq=4.0), product of:
          0.16676687 = queryWeight, product of:
            2.0881073 = boost
            4.635553 = idf(docFreq=1165, maxDocs=44218)
            0.017228816 = queryNorm
          0.5070136 = fieldWeight in 5154, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            4.635553 = idf(docFreq=1165, maxDocs=44218)
            0.0546875 = fieldNorm(doc=5154)
      0.046972692 = weight(abstract_txt:term in 5154) [ClassicSimilarity], result of:
        0.046972692 = score(doc=5154,freq=1.0), product of:
          0.17889869 = queryWeight, product of:
            2.1627262 = boost
            4.8012047 = idf(docFreq=987, maxDocs=44218)
            0.017228816 = queryNorm
          0.26256588 = fieldWeight in 5154, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.8012047 = idf(docFreq=987, maxDocs=44218)
            0.0546875 = fieldNorm(doc=5154)
      0.18790065 = weight(abstract_txt:documents in 5154) [ClassicSimilarity], result of:
        0.18790065 = score(doc=5154,freq=10.0), product of:
          0.2636366 = queryWeight, product of:
            3.7129216 = boost
            4.1213026 = idf(docFreq=1949, maxDocs=44218)
            0.017228816 = queryNorm
          0.712726 = fieldWeight in 5154, product of:
            3.1622777 = tf(freq=10.0), with freq of:
              10.0 = termFreq=10.0
            4.1213026 = idf(docFreq=1949, maxDocs=44218)
            0.0546875 = fieldNorm(doc=5154)
    0.36 = coord(9/25)