Document (#42248)

Author

Jiang, J.-D.
Jiang, J.-Y.
Cheng, P.-J.

Title

Cocluster hypothesis and ranking consistency for relevance ranking in web search

Source

Journal of the Association for Information Science and Technology. 70(2019) no.6, S.535-546

Year

2019

Abstract

Conventional approaches to relevance ranking typically optimize ranking models by each query separately. The traditional cluster hypothesis also does not consider the dependency between related queries. The goal of this paper is to leverage similar search intents to perform ranking consistency so that the search performance can be improved accordingly. Different from the previous supervised approach, which learns relevance by click-through data, we propose a novel cocluster hypothesis to bridge the gap between relevance ranking and ranking consistency. A nearest-neighbors test is also designed to measure the extent to which the cocluster hypothesis holds. Based on the hypothesis, we further propose a two-stage unsupervised approach, in which two ranking heuristics and a cost function are developed to optimize the combination of consistency and uniqueness (or inconsistency). Extensive experiments have been conducted on a real and large-scale search engine log. The experimental results not only verify the applicability of the proposed cocluster hypothesis but also show that our approach is effective in boosting the retrieval performance of the commercial search engine and reaches a comparable performance to the supervised approach.

Content

Vgl.: https://onlinelibrary.wiley.com/doi/10.1002/asi.24071.

Theme

Retrievalalgorithmen

Similar documents (author)

1. Jiang, D.: ¬A feasibility study of the outsourcing of cataloging in the academic libraries (1998) 2.29

   2.2908332 = sum of:
     2.2908332 = product of:
       4.5816665 = sum of:
         4.5816665 = weight(author_txt:jiang in 5622) [ClassicSimilarity], result of:
           4.5816665 = score(doc=5622,freq=1.0), product of:
             0.890105 = queryWeight, product of:
               1.9763768 = boost
               8.235732 = idf(docFreq=31, maxDocs=44421)
               0.05468514 = queryNorm
             5.1473327 = fieldWeight in 5622, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.235732 = idf(docFreq=31, maxDocs=44421)
               0.625 = fieldNorm(doc=5622)
       0.5 = coord(1/2)
   

2. Jiang, S.Y.: Lost in translation : the treatment of Chinese classics in the Library of Congress Classification (2007) 2.29

   2.2908332 = sum of:
     2.2908332 = product of:
       4.5816665 = sum of:
         4.5816665 = weight(author_txt:jiang in 1773) [ClassicSimilarity], result of:
           4.5816665 = score(doc=1773,freq=1.0), product of:
             0.890105 = queryWeight, product of:
               1.9763768 = boost
               8.235732 = idf(docFreq=31, maxDocs=44421)
               0.05468514 = queryNorm
             5.1473327 = fieldWeight in 1773, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.235732 = idf(docFreq=31, maxDocs=44421)
               0.625 = fieldNorm(doc=1773)
       0.5 = coord(1/2)
   

3. Jiang, T.: Architektur und Anwendungen des kollaborativen Lernsystems K3 (2008) 2.29

   2.2908332 = sum of:
     2.2908332 = product of:
       4.5816665 = sum of:
         4.5816665 = weight(author_txt:jiang in 2391) [ClassicSimilarity], result of:
           4.5816665 = score(doc=2391,freq=1.0), product of:
             0.890105 = queryWeight, product of:
               1.9763768 = boost
               8.235732 = idf(docFreq=31, maxDocs=44421)
               0.05468514 = queryNorm
             5.1473327 = fieldWeight in 2391, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.235732 = idf(docFreq=31, maxDocs=44421)
               0.625 = fieldNorm(doc=2391)
       0.5 = coord(1/2)
   

4. Jiang, L.; Wagner, C.: Perceptions of justice or injustice as determinants of contributor defections from online communities (2015) 1.83

   1.8326666 = sum of:
     1.8326666 = product of:
       3.6653333 = sum of:
         3.6653333 = weight(author_txt:jiang in 3045) [ClassicSimilarity], result of:
           3.6653333 = score(doc=3045,freq=1.0), product of:
             0.890105 = queryWeight, product of:
               1.9763768 = boost
               8.235732 = idf(docFreq=31, maxDocs=44421)
               0.05468514 = queryNorm
             4.117866 = fieldWeight in 3045, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.235732 = idf(docFreq=31, maxDocs=44421)
               0.5 = fieldNorm(doc=3045)
       0.5 = coord(1/2)
   

5. Jiang, X.; Liu, J.: Extracting the evolutionary backbone of scientific domains : the semantic main path network analysis approach based on citation context analysis (2023) 1.83

   1.8326666 = sum of:
     1.8326666 = product of:
       3.6653333 = sum of:
         3.6653333 = weight(author_txt:jiang in 1949) [ClassicSimilarity], result of:
           3.6653333 = score(doc=1949,freq=1.0), product of:
             0.890105 = queryWeight, product of:
               1.9763768 = boost
               8.235732 = idf(docFreq=31, maxDocs=44421)
               0.05468514 = queryNorm
             4.117866 = fieldWeight in 1949, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.235732 = idf(docFreq=31, maxDocs=44421)
               0.5 = fieldNorm(doc=1949)
       0.5 = coord(1/2)
   

Similar documents (content)

1. Daoud, M.; Huang, J.X.: Modeling geographic, temporal, and proximity contexts for improving geotemporal search (2013) 0.27

   0.26664484 = sum of:
     0.26664484 = product of:
       0.74068004 = sum of:
         0.046301633 = weight(abstract_txt:separately in 1533) [ClassicSimilarity], result of:
           0.046301633 = score(doc=1533,freq=1.0), product of:
             0.11029777 = queryWeight, product of:
               7.676116 = idf(docFreq=55, maxDocs=44421)
               0.014368955 = queryNorm
             0.4197876 = fieldWeight in 1533, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.676116 = idf(docFreq=55, maxDocs=44421)
               0.0546875 = fieldNorm(doc=1533)
         0.08499639 = weight(abstract_txt:intents in 1533) [ClassicSimilarity], result of:
           0.08499639 = score(doc=1533,freq=1.0), product of:
             0.16536216 = queryWeight, product of:
               1.2244321 = boost
               9.398883 = idf(docFreq=9, maxDocs=44421)
               0.014368955 = queryNorm
             0.5140014 = fieldWeight in 1533, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.398883 = idf(docFreq=9, maxDocs=44421)
               0.0546875 = fieldNorm(doc=1533)
         0.012017401 = weight(abstract_txt:also in 1533) [ClassicSimilarity], result of:
           0.012017401 = score(doc=1533,freq=1.0), product of:
             0.06472667 = queryWeight, product of:
               1.3268411 = boost
               3.3949955 = idf(docFreq=4049, maxDocs=44421)
               0.014368955 = queryNorm
             0.18566382 = fieldWeight in 1533, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.3949955 = idf(docFreq=4049, maxDocs=44421)
               0.0546875 = fieldNorm(doc=1533)
         0.027833031 = weight(abstract_txt:propose in 1533) [ClassicSimilarity], result of:
           0.027833031 = score(doc=1533,freq=1.0), product of:
             0.09898123 = queryWeight, product of:
               1.3397015 = boost
               5.1418524 = idf(docFreq=705, maxDocs=44421)
               0.014368955 = queryNorm
             0.28119504 = fieldWeight in 1533, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1418524 = idf(docFreq=705, maxDocs=44421)
               0.0546875 = fieldNorm(doc=1533)
         0.042821903 = weight(abstract_txt:performance in 1533) [ClassicSimilarity], result of:
           0.042821903 = score(doc=1533,freq=2.0), product of:
             0.11985153 = queryWeight, product of:
               1.8055066 = boost
               4.619759 = idf(docFreq=1189, maxDocs=44421)
               0.014368955 = queryNorm
             0.35729125 = fieldWeight in 1533, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.619759 = idf(docFreq=1189, maxDocs=44421)
               0.0546875 = fieldNorm(doc=1533)
         0.037136897 = weight(abstract_txt:approach in 1533) [ClassicSimilarity], result of:
           0.037136897 = score(doc=1533,freq=3.0), product of:
             0.10479788 = queryWeight, product of:
               1.9494984 = boost
               3.741144 = idf(docFreq=2864, maxDocs=44421)
               0.014368955 = queryNorm
             0.35436687 = fieldWeight in 1533, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.741144 = idf(docFreq=2864, maxDocs=44421)
               0.0546875 = fieldNorm(doc=1533)
         0.049967833 = weight(abstract_txt:search in 1533) [ClassicSimilarity], result of:
           0.049967833 = score(doc=1533,freq=4.0), product of:
             0.12500657 = queryWeight, product of:
               2.3804994 = boost
               3.654598 = idf(docFreq=3123, maxDocs=44421)
               0.014368955 = queryNorm
             0.39972165 = fieldWeight in 1533, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               3.654598 = idf(docFreq=3123, maxDocs=44421)
               0.0546875 = fieldNorm(doc=1533)
         0.1909412 = weight(abstract_txt:hypothesis in 1533) [ClassicSimilarity], result of:
           0.1909412 = score(doc=1533,freq=1.0), product of:
             0.5154098 = queryWeight, product of:
               5.2950325 = boost
               6.774214 = idf(docFreq=137, maxDocs=44421)
               0.014368955 = queryNorm
             0.3704648 = fieldWeight in 1533, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.774214 = idf(docFreq=137, maxDocs=44421)
               0.0546875 = fieldNorm(doc=1533)
         0.24866377 = weight(abstract_txt:ranking in 1533) [ClassicSimilarity], result of:
           0.24866377 = score(doc=1533,freq=3.0), product of:
             0.4690658 = queryWeight, product of:
               5.832819 = boost
               5.5966744 = idf(docFreq=447, maxDocs=44421)
               0.014368955 = queryNorm
             0.53012556 = fieldWeight in 1533, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.5966744 = idf(docFreq=447, maxDocs=44421)
               0.0546875 = fieldNorm(doc=1533)
       0.36 = coord(9/25)
   

2. Cui, C.; Ma, J.; Lian, T.; Chen, Z.; Wang, S.: Improving image annotation via ranking-oriented neighbor search and learning-based keyword propagation (2015) 0.21

   0.21458969 = sum of:
     0.21458969 = product of:
       0.6705928 = sum of:
         0.12648702 = weight(abstract_txt:nearest in 2609) [ClassicSimilarity], result of:
           0.12648702 = score(doc=2609,freq=4.0), product of:
             0.12421818 = queryWeight, product of:
               1.0612293 = boost
               8.146119 = idf(docFreq=34, maxDocs=44421)
               0.014368955 = queryNorm
             1.0182649 = fieldWeight in 2609, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               8.146119 = idf(docFreq=34, maxDocs=44421)
               0.0625 = fieldNorm(doc=2609)
         0.00868279 = weight(abstract_txt:which in 2609) [ClassicSimilarity], result of:
           0.00868279 = score(doc=2609,freq=1.0), product of:
             0.04767834 = queryWeight, product of:
               1.1387748 = boost
               2.9137893 = idf(docFreq=6552, maxDocs=44421)
               0.014368955 = queryNorm
             0.18211183 = fieldWeight in 2609, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.9137893 = idf(docFreq=6552, maxDocs=44421)
               0.0625 = fieldNorm(doc=2609)
         0.20844589 = weight(abstract_txt:neighbors in 2609) [ClassicSimilarity], result of:
           0.20844589 = score(doc=2609,freq=4.0), product of:
             0.17330727 = queryWeight, product of:
               1.253502 = boost
               9.622026 = idf(docFreq=7, maxDocs=44421)
               0.014368955 = queryNorm
             1.2027533 = fieldWeight in 2609, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               9.622026 = idf(docFreq=7, maxDocs=44421)
               0.0625 = fieldNorm(doc=2609)
         0.03180918 = weight(abstract_txt:propose in 2609) [ClassicSimilarity], result of:
           0.03180918 = score(doc=2609,freq=1.0), product of:
             0.09898123 = queryWeight, product of:
               1.3397015 = boost
               5.1418524 = idf(docFreq=705, maxDocs=44421)
               0.014368955 = queryNorm
             0.32136577 = fieldWeight in 2609, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1418524 = idf(docFreq=705, maxDocs=44421)
               0.0625 = fieldNorm(doc=2609)
         0.034653883 = weight(abstract_txt:approach in 2609) [ClassicSimilarity], result of:
           0.034653883 = score(doc=2609,freq=2.0), product of:
             0.10479788 = queryWeight, product of:
               1.9494984 = boost
               3.741144 = idf(docFreq=2864, maxDocs=44421)
               0.014368955 = queryNorm
             0.33067352 = fieldWeight in 2609, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.741144 = idf(docFreq=2864, maxDocs=44421)
               0.0625 = fieldNorm(doc=2609)
         0.04038011 = weight(abstract_txt:search in 2609) [ClassicSimilarity], result of:
           0.04038011 = score(doc=2609,freq=2.0), product of:
             0.12500657 = queryWeight, product of:
               2.3804994 = boost
               3.654598 = idf(docFreq=3123, maxDocs=44421)
               0.014368955 = queryNorm
             0.3230239 = fieldWeight in 2609, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.654598 = idf(docFreq=3123, maxDocs=44421)
               0.0625 = fieldNorm(doc=2609)
         0.056058403 = weight(abstract_txt:relevance in 2609) [ClassicSimilarity], result of:
           0.056058403 = score(doc=2609,freq=1.0), product of:
             0.18195124 = queryWeight, product of:
               2.5687637 = boost
               4.929532 = idf(docFreq=872, maxDocs=44421)
               0.014368955 = queryNorm
             0.30809575 = fieldWeight in 2609, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.929532 = idf(docFreq=872, maxDocs=44421)
               0.0625 = fieldNorm(doc=2609)
         0.16407552 = weight(abstract_txt:ranking in 2609) [ClassicSimilarity], result of:
           0.16407552 = score(doc=2609,freq=1.0), product of:
             0.4690658 = queryWeight, product of:
               5.832819 = boost
               5.5966744 = idf(docFreq=447, maxDocs=44421)
               0.014368955 = queryNorm
             0.34979215 = fieldWeight in 2609, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.5966744 = idf(docFreq=447, maxDocs=44421)
               0.0625 = fieldNorm(doc=2609)
       0.32 = coord(8/25)
   

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) 0.19

   0.18978605 = sum of:
     0.18978605 = product of:
       0.67780733 = sum of:
         0.00868279 = weight(abstract_txt:which in 3066) [ClassicSimilarity], result of:
           0.00868279 = score(doc=3066,freq=1.0), product of:
             0.04767834 = queryWeight, product of:
               1.1387748 = boost
               2.9137893 = idf(docFreq=6552, maxDocs=44421)
               0.014368955 = queryNorm
             0.18211183 = fieldWeight in 3066, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.9137893 = idf(docFreq=6552, maxDocs=44421)
               0.0625 = fieldNorm(doc=3066)
         0.07856588 = weight(abstract_txt:boosting in 3066) [ClassicSimilarity], result of:
           0.07856588 = score(doc=3066,freq=1.0), product of:
             0.14354801 = queryWeight, product of:
               1.140815 = boost
               8.757029 = idf(docFreq=18, maxDocs=44421)
               0.014368955 = queryNorm
             0.5473143 = fieldWeight in 3066, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.757029 = idf(docFreq=18, maxDocs=44421)
               0.0625 = fieldNorm(doc=3066)
         0.013734172 = weight(abstract_txt:also in 3066) [ClassicSimilarity], result of:
           0.013734172 = score(doc=3066,freq=1.0), product of:
             0.06472667 = queryWeight, product of:
               1.3268411 = boost
               3.3949955 = idf(docFreq=4049, maxDocs=44421)
               0.014368955 = queryNorm
             0.21218722 = fieldWeight in 3066, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.3949955 = idf(docFreq=4049, maxDocs=44421)
               0.0625 = fieldNorm(doc=3066)
         0.04498497 = weight(abstract_txt:propose in 3066) [ClassicSimilarity], result of:
           0.04498497 = score(doc=3066,freq=2.0), product of:
             0.09898123 = queryWeight, product of:
               1.3397015 = boost
               5.1418524 = idf(docFreq=705, maxDocs=44421)
               0.014368955 = queryNorm
             0.4544798 = fieldWeight in 3066, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.1418524 = idf(docFreq=705, maxDocs=44421)
               0.0625 = fieldNorm(doc=3066)
         0.039210808 = weight(abstract_txt:engine in 3066) [ClassicSimilarity], result of:
           0.039210808 = score(doc=3066,freq=1.0), product of:
             0.11379462 = queryWeight, product of:
               1.4364566 = boost
               5.5132036 = idf(docFreq=486, maxDocs=44421)
               0.014368955 = queryNorm
             0.34457523 = fieldWeight in 3066, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.5132036 = idf(docFreq=486, maxDocs=44421)
               0.0625 = fieldNorm(doc=3066)
         0.028553048 = weight(abstract_txt:search in 3066) [ClassicSimilarity], result of:
           0.028553048 = score(doc=3066,freq=1.0), product of:
             0.12500657 = queryWeight, product of:
               2.3804994 = boost
               3.654598 = idf(docFreq=3123, maxDocs=44421)
               0.014368955 = queryNorm
             0.22841237 = fieldWeight in 3066, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.654598 = idf(docFreq=3123, maxDocs=44421)
               0.0625 = fieldNorm(doc=3066)
         0.46407565 = weight(abstract_txt:ranking in 3066) [ClassicSimilarity], result of:
           0.46407565 = score(doc=3066,freq=8.0), product of:
             0.4690658 = queryWeight, product of:
               5.832819 = boost
               5.5966744 = idf(docFreq=447, maxDocs=44421)
               0.014368955 = queryNorm
             0.9893616 = fieldWeight in 3066, product of:
               2.828427 = tf(freq=8.0), with freq of:
                 8.0 = termFreq=8.0
               5.5966744 = idf(docFreq=447, maxDocs=44421)
               0.0625 = fieldNorm(doc=3066)
       0.28 = coord(7/25)
   

4. Costa Carvalho, A. da; Rossi, C.; Moura, E.S. de; Silva, A.S. da; Fernandes, D.: LePrEF: Learn to precompute evidence fusion for efficient query evaluation (2012) 0.19

   0.18576473 = sum of:
     0.18576473 = product of:
       0.5805148 = sum of:
         0.00868279 = weight(abstract_txt:which in 1278) [ClassicSimilarity], result of:
           0.00868279 = score(doc=1278,freq=1.0), product of:
             0.04767834 = queryWeight, product of:
               1.1387748 = boost
               2.9137893 = idf(docFreq=6552, maxDocs=44421)
               0.014368955 = queryNorm
             0.18211183 = fieldWeight in 1278, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.9137893 = idf(docFreq=6552, maxDocs=44421)
               0.0625 = fieldNorm(doc=1278)
         0.019423053 = weight(abstract_txt:also in 1278) [ClassicSimilarity], result of:
           0.019423053 = score(doc=1278,freq=2.0), product of:
             0.06472667 = queryWeight, product of:
               1.3268411 = boost
               3.3949955 = idf(docFreq=4049, maxDocs=44421)
               0.014368955 = queryNorm
             0.30007803 = fieldWeight in 1278, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.3949955 = idf(docFreq=4049, maxDocs=44421)
               0.0625 = fieldNorm(doc=1278)
         0.03180918 = weight(abstract_txt:propose in 1278) [ClassicSimilarity], result of:
           0.03180918 = score(doc=1278,freq=1.0), product of:
             0.09898123 = queryWeight, product of:
               1.3397015 = boost
               5.1418524 = idf(docFreq=705, maxDocs=44421)
               0.014368955 = queryNorm
             0.32136577 = fieldWeight in 1278, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1418524 = idf(docFreq=705, maxDocs=44421)
               0.0625 = fieldNorm(doc=1278)
         0.039210808 = weight(abstract_txt:engine in 1278) [ClassicSimilarity], result of:
           0.039210808 = score(doc=1278,freq=1.0), product of:
             0.11379462 = queryWeight, product of:
               1.4364566 = boost
               5.5132036 = idf(docFreq=486, maxDocs=44421)
               0.014368955 = queryNorm
             0.34457523 = fieldWeight in 1278, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.5132036 = idf(docFreq=486, maxDocs=44421)
               0.0625 = fieldNorm(doc=1278)
         0.024503997 = weight(abstract_txt:approach in 1278) [ClassicSimilarity], result of:
           0.024503997 = score(doc=1278,freq=1.0), product of:
             0.10479788 = queryWeight, product of:
               1.9494984 = boost
               3.741144 = idf(docFreq=2864, maxDocs=44421)
               0.014368955 = queryNorm
             0.2338215 = fieldWeight in 1278, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.741144 = idf(docFreq=2864, maxDocs=44421)
               0.0625 = fieldNorm(doc=1278)
         0.04945533 = weight(abstract_txt:search in 1278) [ClassicSimilarity], result of:
           0.04945533 = score(doc=1278,freq=3.0), product of:
             0.12500657 = queryWeight, product of:
               2.3804994 = boost
               3.654598 = idf(docFreq=3123, maxDocs=44421)
               0.014368955 = queryNorm
             0.39562184 = fieldWeight in 1278, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.654598 = idf(docFreq=3123, maxDocs=44421)
               0.0625 = fieldNorm(doc=1278)
         0.07927855 = weight(abstract_txt:relevance in 1278) [ClassicSimilarity], result of:
           0.07927855 = score(doc=1278,freq=2.0), product of:
             0.18195124 = queryWeight, product of:
               2.5687637 = boost
               4.929532 = idf(docFreq=872, maxDocs=44421)
               0.014368955 = queryNorm
             0.43571317 = fieldWeight in 1278, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.929532 = idf(docFreq=872, maxDocs=44421)
               0.0625 = fieldNorm(doc=1278)
         0.32815105 = weight(abstract_txt:ranking in 1278) [ClassicSimilarity], result of:
           0.32815105 = score(doc=1278,freq=4.0), product of:
             0.4690658 = queryWeight, product of:
               5.832819 = boost
               5.5966744 = idf(docFreq=447, maxDocs=44421)
               0.014368955 = queryNorm
             0.6995843 = fieldWeight in 1278, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.5966744 = idf(docFreq=447, maxDocs=44421)
               0.0625 = fieldNorm(doc=1278)
       0.32 = coord(8/25)
   

5. Hsu, M.-H.; Chen, H.-H.: Efficient and effective prediction of social tags to enhance Web search (2011) 0.17

   0.16780762 = sum of:
     0.16780762 = product of:
       0.59931296 = sum of:
         0.00868279 = weight(abstract_txt:which in 625) [ClassicSimilarity], result of:
           0.00868279 = score(doc=625,freq=1.0), product of:
             0.04767834 = queryWeight, product of:
               1.1387748 = boost
               2.9137893 = idf(docFreq=6552, maxDocs=44421)
               0.014368955 = queryNorm
             0.18211183 = fieldWeight in 625, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.9137893 = idf(docFreq=6552, maxDocs=44421)
               0.0625 = fieldNorm(doc=625)
         0.03180918 = weight(abstract_txt:propose in 625) [ClassicSimilarity], result of:
           0.03180918 = score(doc=625,freq=1.0), product of:
             0.09898123 = queryWeight, product of:
               1.3397015 = boost
               5.1418524 = idf(docFreq=705, maxDocs=44421)
               0.014368955 = queryNorm
             0.32136577 = fieldWeight in 625, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1418524 = idf(docFreq=705, maxDocs=44421)
               0.0625 = fieldNorm(doc=625)
         0.034605324 = weight(abstract_txt:performance in 625) [ClassicSimilarity], result of:
           0.034605324 = score(doc=625,freq=1.0), product of:
             0.11985153 = queryWeight, product of:
               1.8055066 = boost
               4.619759 = idf(docFreq=1189, maxDocs=44421)
               0.014368955 = queryNorm
             0.28873494 = fieldWeight in 625, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.619759 = idf(docFreq=1189, maxDocs=44421)
               0.0625 = fieldNorm(doc=625)
         0.024503997 = weight(abstract_txt:approach in 625) [ClassicSimilarity], result of:
           0.024503997 = score(doc=625,freq=1.0), product of:
             0.10479788 = queryWeight, product of:
               1.9494984 = boost
               3.741144 = idf(docFreq=2864, maxDocs=44421)
               0.014368955 = queryNorm
             0.2338215 = fieldWeight in 625, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.741144 = idf(docFreq=2864, maxDocs=44421)
               0.0625 = fieldNorm(doc=625)
         0.04945533 = weight(abstract_txt:search in 625) [ClassicSimilarity], result of:
           0.04945533 = score(doc=625,freq=3.0), product of:
             0.12500657 = queryWeight, product of:
               2.3804994 = boost
               3.654598 = idf(docFreq=3123, maxDocs=44421)
               0.014368955 = queryNorm
             0.39562184 = fieldWeight in 625, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.654598 = idf(docFreq=3123, maxDocs=44421)
               0.0625 = fieldNorm(doc=625)
         0.21821852 = weight(abstract_txt:hypothesis in 625) [ClassicSimilarity], result of:
           0.21821852 = score(doc=625,freq=1.0), product of:
             0.5154098 = queryWeight, product of:
               5.2950325 = boost
               6.774214 = idf(docFreq=137, maxDocs=44421)
               0.014368955 = queryNorm
             0.42338836 = fieldWeight in 625, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.774214 = idf(docFreq=137, maxDocs=44421)
               0.0625 = fieldNorm(doc=625)
         0.23203783 = weight(abstract_txt:ranking in 625) [ClassicSimilarity], result of:
           0.23203783 = score(doc=625,freq=2.0), product of:
             0.4690658 = queryWeight, product of:
               5.832819 = boost
               5.5966744 = idf(docFreq=447, maxDocs=44421)
               0.014368955 = queryNorm
             0.4946808 = fieldWeight in 625, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.5966744 = idf(docFreq=447, maxDocs=44421)
               0.0625 = fieldNorm(doc=625)
       0.28 = coord(7/25)