Document (#6733)

Author

Lee, J.H.
Kim, M.H.

Title

Ranking documents in thesaurus-based Boolean retrieval systems

Source

Information processing and management. 30(1994) no.1, S.79-91

Year

1994

Abstract

Investigates document ranking methods in thesaurus-based Boolean retrieval systems and proposes a new thesaurus-based ranking algorithm, the Extended Relevance (E-Relevance) algorithm. The E-Relevance algorithm integrates the extended Boolean model and the thesaurus-based relevance algorithm. Since the E-Relevance algorithm has all the desirable properties of previous thesauri-based ranking algorithms. It also ranks documents effectively by uisng terms dependence information from the thesaurus. Through performance comparison shows that the proposed algorithm achieved higher retrieval effectiveness than the others proposed earlier

Similar documents (content)

1. Smith, M.P.; Pollitt, A.S.: ¬The potential for incorporating document ranking in the MenUSE front-end search internemdiary system (1996) 0.32

   0.3214022 = sum of:
     0.3214022 = product of:
       0.8035055 = sum of:
         0.030707354 = weight(abstract_txt:algorithms in 6980) [ClassicSimilarity], result of:
           0.030707354 = score(doc=6980,freq=1.0), product of:
             0.08607639 = queryWeight, product of:
               1.057787 = boost
               5.707926 = idf(docFreq=398, maxDocs=44218)
               0.014256324 = queryNorm
             0.35674536 = fieldWeight in 6980, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.707926 = idf(docFreq=398, maxDocs=44218)
               0.0625 = fieldNorm(doc=6980)
         0.036275014 = weight(abstract_txt:investigates in 6980) [ClassicSimilarity], result of:
           0.036275014 = score(doc=6980,freq=1.0), product of:
             0.09618947 = queryWeight, product of:
               1.1182011 = boost
               6.033927 = idf(docFreq=287, maxDocs=44218)
               0.014256324 = queryNorm
             0.37712044 = fieldWeight in 6980, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.033927 = idf(docFreq=287, maxDocs=44218)
               0.0625 = fieldNorm(doc=6980)
         0.013116502 = weight(abstract_txt:systems in 6980) [ClassicSimilarity], result of:
           0.013116502 = score(doc=6980,freq=1.0), product of:
             0.061509825 = queryWeight, product of:
               1.2645715 = boost
               3.4118783 = idf(docFreq=3963, maxDocs=44218)
               0.014256324 = queryNorm
             0.2132424 = fieldWeight in 6980, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4118783 = idf(docFreq=3963, maxDocs=44218)
               0.0625 = fieldNorm(doc=6980)
         0.040040694 = weight(abstract_txt:documents in 6980) [ClassicSimilarity], result of:
           0.040040694 = score(doc=6980,freq=3.0), product of:
             0.089748345 = queryWeight, product of:
               1.5275111 = boost
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.014256324 = queryNorm
             0.44614407 = fieldWeight in 6980, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.0625 = fieldNorm(doc=6980)
         0.020789566 = weight(abstract_txt:retrieval in 6980) [ClassicSimilarity], result of:
           0.020789566 = score(doc=6980,freq=1.0), product of:
             0.0957179 = queryWeight, product of:
               1.9320278 = boost
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.014256324 = queryNorm
             0.21719621 = fieldWeight in 6980, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.0625 = fieldNorm(doc=6980)
         0.026748711 = weight(abstract_txt:based in 6980) [ClassicSimilarity], result of:
           0.026748711 = score(doc=6980,freq=1.0), product of:
             0.13425003 = queryWeight, product of:
               2.9539175 = boost
               3.1879277 = idf(docFreq=4958, maxDocs=44218)
               0.014256324 = queryNorm
             0.19924548 = fieldWeight in 6980, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.1879277 = idf(docFreq=4958, maxDocs=44218)
               0.0625 = fieldNorm(doc=6980)
         0.12094836 = weight(abstract_txt:boolean in 6980) [ClassicSimilarity], result of:
           0.12094836 = score(doc=6980,freq=1.0), product of:
             0.30962038 = queryWeight, product of:
               3.4748142 = boost
               6.2501497 = idf(docFreq=231, maxDocs=44218)
               0.014256324 = queryNorm
             0.39063436 = fieldWeight in 6980, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.2501497 = idf(docFreq=231, maxDocs=44218)
               0.0625 = fieldNorm(doc=6980)
         0.23183838 = weight(abstract_txt:ranking in 6980) [ClassicSimilarity], result of:
           0.23183838 = score(doc=6980,freq=4.0), product of:
             0.3312679 = queryWeight, product of:
               4.150265 = boost
               5.598813 = idf(docFreq=444, maxDocs=44218)
               0.014256324 = queryNorm
             0.69985163 = fieldWeight in 6980, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.598813 = idf(docFreq=444, maxDocs=44218)
               0.0625 = fieldNorm(doc=6980)
         0.09903906 = weight(abstract_txt:relevance in 6980) [ClassicSimilarity], result of:
           0.09903906 = score(doc=6980,freq=1.0), product of:
             0.3213045 = queryWeight, product of:
               4.569825 = boost
               4.931848 = idf(docFreq=866, maxDocs=44218)
               0.014256324 = queryNorm
             0.3082405 = fieldWeight in 6980, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.931848 = idf(docFreq=866, maxDocs=44218)
               0.0625 = fieldNorm(doc=6980)
         0.18400185 = weight(abstract_txt:algorithm in 6980) [ClassicSimilarity], result of:
           0.18400185 = score(doc=6980,freq=1.0), product of:
             0.5160055 = queryWeight, product of:
               6.3439384 = boost
               5.705423 = idf(docFreq=399, maxDocs=44218)
               0.014256324 = queryNorm
             0.35658893 = fieldWeight in 6980, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.705423 = idf(docFreq=399, maxDocs=44218)
               0.0625 = fieldNorm(doc=6980)
       0.4 = coord(10/25)
   

2. Lee, J.H.; Kim, M.H.; Lee, Y.J.: Information retrieval based on conceptual distance in is-a hierarchies (1993) 0.31

   0.30541512 = sum of:
     0.30541512 = product of:
       0.8483753 = sum of:
         0.042673163 = weight(abstract_txt:effectively in 6729) [ClassicSimilarity], result of:
           0.042673163 = score(doc=6729,freq=1.0), product of:
             0.092374556 = queryWeight, product of:
               1.0958027 = boost
               5.913062 = idf(docFreq=324, maxDocs=44218)
               0.014256324 = queryNorm
             0.461958 = fieldWeight in 6729, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.913062 = idf(docFreq=324, maxDocs=44218)
               0.078125 = fieldNorm(doc=6729)
         0.08578661 = weight(abstract_txt:dependence in 6729) [ClassicSimilarity], result of:
           0.08578661 = score(doc=6729,freq=1.0), product of:
             0.14713934 = queryWeight, product of:
               1.3829949 = boost
               7.462781 = idf(docFreq=68, maxDocs=44218)
               0.014256324 = queryNorm
             0.58302975 = fieldWeight in 6729, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.462781 = idf(docFreq=68, maxDocs=44218)
               0.078125 = fieldNorm(doc=6729)
         0.04086636 = weight(abstract_txt:documents in 6729) [ClassicSimilarity], result of:
           0.04086636 = score(doc=6729,freq=2.0), product of:
             0.089748345 = queryWeight, product of:
               1.5275111 = boost
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.014256324 = queryNorm
             0.4553439 = fieldWeight in 6729, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.078125 = fieldNorm(doc=6729)
         0.040425576 = weight(abstract_txt:proposed in 6729) [ClassicSimilarity], result of:
           0.040425576 = score(doc=6729,freq=1.0), product of:
             0.112261266 = queryWeight, product of:
               1.7083865 = boost
               4.6093135 = idf(docFreq=1196, maxDocs=44218)
               0.014256324 = queryNorm
             0.36010262 = fieldWeight in 6729, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.6093135 = idf(docFreq=1196, maxDocs=44218)
               0.078125 = fieldNorm(doc=6729)
         0.025986955 = weight(abstract_txt:retrieval in 6729) [ClassicSimilarity], result of:
           0.025986955 = score(doc=6729,freq=1.0), product of:
             0.0957179 = queryWeight, product of:
               1.9320278 = boost
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.014256324 = queryNorm
             0.27149525 = fieldWeight in 6729, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.078125 = fieldNorm(doc=6729)
         0.13193087 = weight(abstract_txt:extended in 6729) [ClassicSimilarity], result of:
           0.13193087 = score(doc=6729,freq=2.0), product of:
             0.19604093 = queryWeight, product of:
               2.2575872 = boost
               6.091085 = idf(docFreq=271, maxDocs=44218)
               0.014256324 = queryNorm
             0.67297614 = fieldWeight in 6729, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.091085 = idf(docFreq=271, maxDocs=44218)
               0.078125 = fieldNorm(doc=6729)
         0.03343589 = weight(abstract_txt:based in 6729) [ClassicSimilarity], result of:
           0.03343589 = score(doc=6729,freq=1.0), product of:
             0.13425003 = queryWeight, product of:
               2.9539175 = boost
               3.1879277 = idf(docFreq=4958, maxDocs=44218)
               0.014256324 = queryNorm
             0.24905685 = fieldWeight in 6729, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.1879277 = idf(docFreq=4958, maxDocs=44218)
               0.078125 = fieldNorm(doc=6729)
         0.30237088 = weight(abstract_txt:boolean in 6729) [ClassicSimilarity], result of:
           0.30237088 = score(doc=6729,freq=4.0), product of:
             0.30962038 = queryWeight, product of:
               3.4748142 = boost
               6.2501497 = idf(docFreq=231, maxDocs=44218)
               0.014256324 = queryNorm
             0.97658587 = fieldWeight in 6729, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               6.2501497 = idf(docFreq=231, maxDocs=44218)
               0.078125 = fieldNorm(doc=6729)
         0.14489898 = weight(abstract_txt:ranking in 6729) [ClassicSimilarity], result of:
           0.14489898 = score(doc=6729,freq=1.0), product of:
             0.3312679 = queryWeight, product of:
               4.150265 = boost
               5.598813 = idf(docFreq=444, maxDocs=44218)
               0.014256324 = queryNorm
             0.43740726 = fieldWeight in 6729, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.598813 = idf(docFreq=444, maxDocs=44218)
               0.078125 = fieldNorm(doc=6729)
       0.36 = coord(9/25)
   

3. Qin, T.; Zhang, X.-D.; Tsai, M.-F.; Wang, D.-S.; Liu, T.-Y.; Li, H.: Query-level loss functions for information retrieval (2008) 0.28

   0.27623546 = sum of:
     0.27623546 = product of:
       0.7673207 = sum of:
         0.030707354 = weight(abstract_txt:algorithms in 2066) [ClassicSimilarity], result of:
           0.030707354 = score(doc=2066,freq=1.0), product of:
             0.08607639 = queryWeight, product of:
               1.057787 = boost
               5.707926 = idf(docFreq=398, maxDocs=44218)
               0.014256324 = queryNorm
             0.35674536 = fieldWeight in 2066, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.707926 = idf(docFreq=398, maxDocs=44218)
               0.0625 = fieldNorm(doc=2066)
         0.033719078 = weight(abstract_txt:properties in 2066) [ClassicSimilarity], result of:
           0.033719078 = score(doc=2066,freq=1.0), product of:
             0.09161634 = queryWeight, product of:
               1.0912962 = boost
               5.888745 = idf(docFreq=332, maxDocs=44218)
               0.014256324 = queryNorm
             0.36804655 = fieldWeight in 2066, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.888745 = idf(docFreq=332, maxDocs=44218)
               0.0625 = fieldNorm(doc=2066)
         0.023117505 = weight(abstract_txt:documents in 2066) [ClassicSimilarity], result of:
           0.023117505 = score(doc=2066,freq=1.0), product of:
             0.089748345 = queryWeight, product of:
               1.5275111 = boost
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.014256324 = queryNorm
             0.2575814 = fieldWeight in 2066, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.0625 = fieldNorm(doc=2066)
         0.045736317 = weight(abstract_txt:proposed in 2066) [ClassicSimilarity], result of:
           0.045736317 = score(doc=2066,freq=2.0), product of:
             0.112261266 = queryWeight, product of:
               1.7083865 = boost
               4.6093135 = idf(docFreq=1196, maxDocs=44218)
               0.014256324 = queryNorm
             0.4074096 = fieldWeight in 2066, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.6093135 = idf(docFreq=1196, maxDocs=44218)
               0.0625 = fieldNorm(doc=2066)
         0.020789566 = weight(abstract_txt:retrieval in 2066) [ClassicSimilarity], result of:
           0.020789566 = score(doc=2066,freq=1.0), product of:
             0.0957179 = queryWeight, product of:
               1.9320278 = boost
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.014256324 = queryNorm
             0.21719621 = fieldWeight in 2066, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.0625 = fieldNorm(doc=2066)
         0.07463137 = weight(abstract_txt:extended in 2066) [ClassicSimilarity], result of:
           0.07463137 = score(doc=2066,freq=1.0), product of:
             0.19604093 = queryWeight, product of:
               2.2575872 = boost
               6.091085 = idf(docFreq=271, maxDocs=44218)
               0.014256324 = queryNorm
             0.3806928 = fieldWeight in 2066, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.091085 = idf(docFreq=271, maxDocs=44218)
               0.0625 = fieldNorm(doc=2066)
         0.026748711 = weight(abstract_txt:based in 2066) [ClassicSimilarity], result of:
           0.026748711 = score(doc=2066,freq=1.0), product of:
             0.13425003 = queryWeight, product of:
               2.9539175 = boost
               3.1879277 = idf(docFreq=4958, maxDocs=44218)
               0.014256324 = queryNorm
             0.19924548 = fieldWeight in 2066, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.1879277 = idf(docFreq=4958, maxDocs=44218)
               0.0625 = fieldNorm(doc=2066)
         0.32786897 = weight(abstract_txt:ranking in 2066) [ClassicSimilarity], result of:
           0.32786897 = score(doc=2066,freq=8.0), product of:
             0.3312679 = queryWeight, product of:
               4.150265 = boost
               5.598813 = idf(docFreq=444, maxDocs=44218)
               0.014256324 = queryNorm
             0.98973966 = fieldWeight in 2066, product of:
               2.828427 = tf(freq=8.0), with freq of:
                 8.0 = termFreq=8.0
               5.598813 = idf(docFreq=444, maxDocs=44218)
               0.0625 = fieldNorm(doc=2066)
         0.18400185 = weight(abstract_txt:algorithm in 2066) [ClassicSimilarity], result of:
           0.18400185 = score(doc=2066,freq=1.0), product of:
             0.5160055 = queryWeight, product of:
               6.3439384 = boost
               5.705423 = idf(docFreq=399, maxDocs=44218)
               0.014256324 = queryNorm
             0.35658893 = fieldWeight in 2066, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.705423 = idf(docFreq=399, maxDocs=44218)
               0.0625 = fieldNorm(doc=2066)
       0.36 = coord(9/25)
   

4. Soulier, L.; Jabeur, L.B.; Tamine, L.; Bahsoun, W.: On ranking relevant entities in heterogeneous networks using a language-based model (2013) 0.23

   0.23416469 = sum of:
     0.23416469 = product of:
       0.7317647 = sum of:
         0.0357831 = weight(abstract_txt:achieved in 664) [ClassicSimilarity], result of:
           0.0357831 = score(doc=664,freq=1.0), product of:
             0.0953179 = queryWeight, product of:
               1.1131237 = boost
               6.006528 = idf(docFreq=295, maxDocs=44218)
               0.014256324 = queryNorm
             0.375408 = fieldWeight in 664, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.006528 = idf(docFreq=295, maxDocs=44218)
               0.0625 = fieldNorm(doc=664)
         0.07208556 = weight(abstract_txt:ranks in 664) [ClassicSimilarity], result of:
           0.07208556 = score(doc=664,freq=1.0), product of:
             0.15203887 = queryWeight, product of:
               1.4058322 = boost
               7.5860133 = idf(docFreq=60, maxDocs=44218)
               0.014256324 = queryNorm
             0.47412583 = fieldWeight in 664, 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=664)
         0.023117505 = weight(abstract_txt:documents in 664) [ClassicSimilarity], result of:
           0.023117505 = score(doc=664,freq=1.0), product of:
             0.089748345 = queryWeight, product of:
               1.5275111 = boost
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.014256324 = queryNorm
             0.2575814 = fieldWeight in 664, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.0625 = fieldNorm(doc=664)
         0.020789566 = weight(abstract_txt:retrieval in 664) [ClassicSimilarity], result of:
           0.020789566 = score(doc=664,freq=1.0), product of:
             0.0957179 = queryWeight, product of:
               1.9320278 = boost
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.014256324 = queryNorm
             0.21719621 = fieldWeight in 664, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.0625 = fieldNorm(doc=664)
         0.046330128 = weight(abstract_txt:based in 664) [ClassicSimilarity], result of:
           0.046330128 = score(doc=664,freq=3.0), product of:
             0.13425003 = queryWeight, product of:
               2.9539175 = boost
               3.1879277 = idf(docFreq=4958, maxDocs=44218)
               0.014256324 = queryNorm
             0.3451033 = fieldWeight in 664, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.1879277 = idf(docFreq=4958, maxDocs=44218)
               0.0625 = fieldNorm(doc=664)
         0.11591919 = weight(abstract_txt:ranking in 664) [ClassicSimilarity], result of:
           0.11591919 = score(doc=664,freq=1.0), product of:
             0.3312679 = queryWeight, product of:
               4.150265 = boost
               5.598813 = idf(docFreq=444, maxDocs=44218)
               0.014256324 = queryNorm
             0.34992582 = fieldWeight in 664, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.598813 = idf(docFreq=444, maxDocs=44218)
               0.0625 = fieldNorm(doc=664)
         0.09903906 = weight(abstract_txt:relevance in 664) [ClassicSimilarity], result of:
           0.09903906 = score(doc=664,freq=1.0), product of:
             0.3213045 = queryWeight, product of:
               4.569825 = boost
               4.931848 = idf(docFreq=866, maxDocs=44218)
               0.014256324 = queryNorm
             0.3082405 = fieldWeight in 664, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.931848 = idf(docFreq=866, maxDocs=44218)
               0.0625 = fieldNorm(doc=664)
         0.31870055 = weight(abstract_txt:algorithm in 664) [ClassicSimilarity], result of:
           0.31870055 = score(doc=664,freq=3.0), product of:
             0.5160055 = queryWeight, product of:
               6.3439384 = boost
               5.705423 = idf(docFreq=399, maxDocs=44218)
               0.014256324 = queryNorm
             0.6176301 = fieldWeight in 664, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.705423 = idf(docFreq=399, maxDocs=44218)
               0.0625 = fieldNorm(doc=664)
       0.32 = coord(8/25)
   

5. Willett, P.: Best-match text retrieval (1993) 0.23

   0.22589509 = sum of:
     0.22589509 = product of:
       0.9412296 = sum of:
         0.045436896 = weight(abstract_txt:systems in 7818) [ClassicSimilarity], result of:
           0.045436896 = score(doc=7818,freq=3.0), product of:
             0.061509825 = queryWeight, product of:
               1.2645715 = boost
               3.4118783 = idf(docFreq=3963, maxDocs=44218)
               0.014256324 = queryNorm
             0.7386933 = fieldWeight in 7818, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.4118783 = idf(docFreq=3963, maxDocs=44218)
               0.125 = fieldNorm(doc=7818)
         0.04623501 = weight(abstract_txt:documents in 7818) [ClassicSimilarity], result of:
           0.04623501 = score(doc=7818,freq=1.0), product of:
             0.089748345 = queryWeight, product of:
               1.5275111 = boost
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.014256324 = queryNorm
             0.5151628 = fieldWeight in 7818, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.125 = fieldNorm(doc=7818)
         0.04157913 = weight(abstract_txt:retrieval in 7818) [ClassicSimilarity], result of:
           0.04157913 = score(doc=7818,freq=1.0), product of:
             0.0957179 = queryWeight, product of:
               1.9320278 = boost
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.014256324 = queryNorm
             0.43439242 = fieldWeight in 7818, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4751394 = idf(docFreq=3720, maxDocs=44218)
               0.125 = fieldNorm(doc=7818)
         0.24189672 = weight(abstract_txt:boolean in 7818) [ClassicSimilarity], result of:
           0.24189672 = score(doc=7818,freq=1.0), product of:
             0.30962038 = queryWeight, product of:
               3.4748142 = boost
               6.2501497 = idf(docFreq=231, maxDocs=44218)
               0.014256324 = queryNorm
             0.7812687 = fieldWeight in 7818, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.2501497 = idf(docFreq=231, maxDocs=44218)
               0.125 = fieldNorm(doc=7818)
         0.19807813 = weight(abstract_txt:relevance in 7818) [ClassicSimilarity], result of:
           0.19807813 = score(doc=7818,freq=1.0), product of:
             0.3213045 = queryWeight, product of:
               4.569825 = boost
               4.931848 = idf(docFreq=866, maxDocs=44218)
               0.014256324 = queryNorm
             0.616481 = fieldWeight in 7818, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.931848 = idf(docFreq=866, maxDocs=44218)
               0.125 = fieldNorm(doc=7818)
         0.3680037 = weight(abstract_txt:algorithm in 7818) [ClassicSimilarity], result of:
           0.3680037 = score(doc=7818,freq=1.0), product of:
             0.5160055 = queryWeight, product of:
               6.3439384 = boost
               5.705423 = idf(docFreq=399, maxDocs=44218)
               0.014256324 = queryNorm
             0.71317786 = fieldWeight in 7818, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.705423 = idf(docFreq=399, maxDocs=44218)
               0.125 = fieldNorm(doc=7818)
       0.24 = coord(6/25)