Document (#37279)

Author

Costa Carvalho, A. da
Rossi, C.
Moura, E.S. de
Silva, A.S. da
Fernandes, D.

Title

LePrEF: Learn to precompute evidence fusion for efficient query evaluation

Source

Journal of the American Society for Information Science and Technology. 63(2012) no.7, S.1383-1397

Year

2012

Abstract

State-of-the-art search engine ranking methods combine several distinct sources of relevance evidence to produce a high-quality ranking of results for each query. The fusion of information is currently done at query-processing time, which has a direct effect on the response time of search systems. Previous research also shows that an alternative to improve search efficiency in textual databases is to precompute term impacts at indexing time. In this article, we propose a novel alternative to precompute term impacts, providing a generic framework for combining any distinct set of sources of evidence by using a machine-learning technique. This method retains the advantages of producing high-quality results, but avoids the costs of combining evidence at query-processing time. Our method, called Learn to Precompute Evidence Fusion (LePrEF), uses genetic programming to compute a unified precomputed impact value for each term found in each document prior to query processing, at indexing time. Compared with previous research on precomputing term impacts, our method offers the advantage of providing a generic framework to precompute impact using any set of relevance evidence at any text collection, whereas previous research articles do not. The precomputed impact values are indexed and used later for computing document ranking at query-processing time. By doing so, our method effectively reduces the query processing to simple additions of such impacts. We show that this approach, while leading to results comparable to state-of-the-art ranking methods, also can lead to a significant decrease in computational costs during query processing.

Theme

Retrievalalgorithmen

Similar documents (author)

1. Costa, L.S. Fernandes => Fernandes Costa, L.S.: 1.90

   1.8957001 = sum of:
     1.8957001 = product of:
       4.73925 = sum of:
         1.988951 = weight(author_txt:costa in 4806) [ClassicSimilarity], result of:
           1.988951 = score(doc=4806,freq=2.0), product of:
             0.4284975 = queryWeight, product of:
               1.1658688 = boost
               8.752448 = idf(docFreq=18, maxDocs=44218)
               0.041992243 = queryNorm
             4.6416864 = fieldWeight in 4806, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               8.752448 = idf(docFreq=18, maxDocs=44218)
               0.375 = fieldNorm(doc=4806)
         2.7502992 = weight(author_txt:fernandes in 4806) [ClassicSimilarity], result of:
           2.7502992 = score(doc=4806,freq=2.0), product of:
             0.5318455 = queryWeight, product of:
               1.2988777 = boost
               9.7509775 = idf(docFreq=6, maxDocs=44218)
               0.041992243 = queryNorm
             5.171237 = fieldWeight in 4806, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               9.7509775 = idf(docFreq=6, maxDocs=44218)
               0.375 = fieldNorm(doc=4806)
       0.4 = coord(2/5)
   

2. Moura, E.S. de; Fernandes, D.; Ribeiro-Neto, B.; Silva, A.S. da; Gonçalves, M.A.: Using structural information to improve search in Web collections (2010) 1.69

   1.6856229 = sum of:
     1.6856229 = product of:
       2.8093715 = sum of:
         0.5916554 = weight(author_txt:silva in 4119) [ClassicSimilarity], result of:
           0.5916554 = score(doc=4119,freq=1.0), product of:
             0.31524554 = queryWeight, product of:
               7.5072327 = idf(docFreq=65, maxDocs=44218)
               0.041992243 = queryNorm
             1.8768082 = fieldWeight in 4119, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.5072327 = idf(docFreq=65, maxDocs=44218)
               0.25 = fieldNorm(doc=4119)
         0.92121273 = weight(author_txt:moura in 4119) [ClassicSimilarity], result of:
           0.92121273 = score(doc=4119,freq=1.0), product of:
             0.42348987 = queryWeight, product of:
               1.1590363 = boost
               8.701155 = idf(docFreq=19, maxDocs=44218)
               0.041992243 = queryNorm
             2.1752887 = fieldWeight in 4119, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.701155 = idf(docFreq=19, maxDocs=44218)
               0.25 = fieldNorm(doc=4119)
         1.2965034 = weight(author_txt:fernandes in 4119) [ClassicSimilarity], result of:
           1.2965034 = score(doc=4119,freq=1.0), product of:
             0.5318455 = queryWeight, product of:
               1.2988777 = boost
               9.7509775 = idf(docFreq=6, maxDocs=44218)
               0.041992243 = queryNorm
             2.4377444 = fieldWeight in 4119, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.7509775 = idf(docFreq=6, maxDocs=44218)
               0.25 = fieldNorm(doc=4119)
       0.6 = coord(3/5)
   

3. Carvalho, A. da Costa -> Costa Carvalho, A. da: 1.51

   1.510677 = sum of:
     1.510677 = product of:
       3.7766924 = sum of:
         1.6574591 = weight(author_txt:costa in 223) [ClassicSimilarity], result of:
           1.6574591 = score(doc=223,freq=2.0), product of:
             0.4284975 = queryWeight, product of:
               1.1658688 = boost
               8.752448 = idf(docFreq=18, maxDocs=44218)
               0.041992243 = queryNorm
             3.868072 = fieldWeight in 223, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               8.752448 = idf(docFreq=18, maxDocs=44218)
               0.3125 = fieldNorm(doc=223)
         2.1192331 = weight(author_txt:carvalho in 223) [ClassicSimilarity], result of:
           2.1192331 = score(doc=223,freq=2.0), product of:
             0.5047839 = queryWeight, product of:
               1.2654014 = boost
               9.499662 = idf(docFreq=8, maxDocs=44218)
               0.041992243 = queryNorm
             4.1982975 = fieldWeight in 223, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               9.499662 = idf(docFreq=8, maxDocs=44218)
               0.3125 = fieldNorm(doc=223)
       0.4 = coord(2/5)
   

4. Silva, S.E.; Reis, L.P.; Fernandes, J.M.; Sester Pereira, A.D.: ¬A multi-layer framework for semantic modeling (2020) 0.94

   0.9440794 = sum of:
     0.9440794 = product of:
       2.3601985 = sum of:
         0.73956925 = weight(author_txt:silva in 5712) [ClassicSimilarity], result of:
           0.73956925 = score(doc=5712,freq=1.0), product of:
             0.31524554 = queryWeight, product of:
               7.5072327 = idf(docFreq=65, maxDocs=44218)
               0.041992243 = queryNorm
             2.3460102 = fieldWeight in 5712, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.5072327 = idf(docFreq=65, maxDocs=44218)
               0.3125 = fieldNorm(doc=5712)
         1.6206292 = weight(author_txt:fernandes in 5712) [ClassicSimilarity], result of:
           1.6206292 = score(doc=5712,freq=1.0), product of:
             0.5318455 = queryWeight, product of:
               1.2988777 = boost
               9.7509775 = idf(docFreq=6, maxDocs=44218)
               0.041992243 = queryNorm
             3.0471804 = fieldWeight in 5712, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.7509775 = idf(docFreq=6, maxDocs=44218)
               0.3125 = fieldNorm(doc=5712)
       0.4 = coord(2/5)
   

5. Souza Gracioso, L. de; Reis da Silveira, L.; Simões, M. da Graça; Fernandes Costa, L.S.: Image organization on the Web : an analysis from the perspective of cultural heritage of rural farms in Brazil (2018) 0.89

   0.8936416 = sum of:
     0.8936416 = product of:
       2.234104 = sum of:
         0.9376005 = weight(author_txt:costa in 4810) [ClassicSimilarity], result of:
           0.9376005 = score(doc=4810,freq=1.0), product of:
             0.4284975 = queryWeight, product of:
               1.1658688 = boost
               8.752448 = idf(docFreq=18, maxDocs=44218)
               0.041992243 = queryNorm
             2.188112 = fieldWeight in 4810, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.752448 = idf(docFreq=18, maxDocs=44218)
               0.25 = fieldNorm(doc=4810)
         1.2965034 = weight(author_txt:fernandes in 4810) [ClassicSimilarity], result of:
           1.2965034 = score(doc=4810,freq=1.0), product of:
             0.5318455 = queryWeight, product of:
               1.2988777 = boost
               9.7509775 = idf(docFreq=6, maxDocs=44218)
               0.041992243 = queryNorm
             2.4377444 = fieldWeight in 4810, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.7509775 = idf(docFreq=6, maxDocs=44218)
               0.25 = fieldNorm(doc=4810)
       0.4 = coord(2/5)
   

Similar documents (content)

1. Seo, H.-C.; Kim, S.-B.; Rim, H.-C.; Myaeng, S.-H.: lmproving query translation in English-Korean Cross-language information retrieval (2005) 0.26

   0.26215068 = sum of:
     0.26215068 = product of:
       0.8192209 = sum of:
         0.0147645 = weight(abstract_txt:research in 1023) [ClassicSimilarity], result of:
           0.0147645 = score(doc=1023,freq=1.0), product of:
             0.059610553 = queryWeight, product of:
               3.170338 = idf(docFreq=5046, maxDocs=44218)
               0.018802587 = queryNorm
             0.24768265 = fieldWeight in 1023, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.170338 = idf(docFreq=5046, maxDocs=44218)
               0.078125 = fieldNorm(doc=1023)
         0.019567993 = weight(abstract_txt:results in 1023) [ClassicSimilarity], result of:
           0.019567993 = score(doc=1023,freq=1.0), product of:
             0.071924165 = queryWeight, product of:
               1.0984387 = boost
               3.482422 = idf(docFreq=3693, maxDocs=44218)
               0.018802587 = queryNorm
             0.27206424 = fieldWeight in 1023, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.482422 = idf(docFreq=3693, maxDocs=44218)
               0.078125 = fieldNorm(doc=1023)
         0.045783687 = weight(abstract_txt:each in 1023) [ClassicSimilarity], result of:
           0.045783687 = score(doc=1023,freq=2.0), product of:
             0.10061001 = queryWeight, product of:
               1.2991492 = boost
               4.118742 = idf(docFreq=1954, maxDocs=44218)
               0.018802587 = queryNorm
             0.45506096 = fieldWeight in 1023, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.118742 = idf(docFreq=1954, maxDocs=44218)
               0.078125 = fieldNorm(doc=1023)
         0.06643054 = weight(abstract_txt:previous in 1023) [ClassicSimilarity], result of:
           0.06643054 = score(doc=1023,freq=1.0), product of:
             0.1624635 = queryWeight, product of:
               1.6508831 = boost
               5.2338576 = idf(docFreq=640, maxDocs=44218)
               0.018802587 = queryNorm
             0.40889513 = fieldWeight in 1023, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.2338576 = idf(docFreq=640, maxDocs=44218)
               0.078125 = fieldNorm(doc=1023)
         0.11266352 = weight(abstract_txt:method in 1023) [ClassicSimilarity], result of:
           0.11266352 = score(doc=1023,freq=4.0), product of:
             0.16019875 = queryWeight, product of:
               1.8929422 = boost
               4.50095 = idf(docFreq=1333, maxDocs=44218)
               0.018802587 = queryNorm
             0.7032734 = fieldWeight in 1023, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.50095 = idf(docFreq=1333, maxDocs=44218)
               0.078125 = fieldNorm(doc=1023)
         0.118427366 = weight(abstract_txt:term in 1023) [ClassicSimilarity], result of:
           0.118427366 = score(doc=1023,freq=3.0), product of:
             0.18228512 = queryWeight, product of:
               2.019219 = boost
               4.8012047 = idf(docFreq=987, maxDocs=44218)
               0.018802587 = queryNorm
             0.64968204 = fieldWeight in 1023, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.8012047 = idf(docFreq=987, maxDocs=44218)
               0.078125 = fieldNorm(doc=1023)
         0.06615343 = weight(abstract_txt:time in 1023) [ClassicSimilarity], result of:
           0.06615343 = score(doc=1023,freq=1.0), product of:
             0.20412157 = queryWeight, product of:
               2.6169648 = boost
               4.148331 = idf(docFreq=1897, maxDocs=44218)
               0.018802587 = queryNorm
             0.32408836 = fieldWeight in 1023, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.148331 = idf(docFreq=1897, maxDocs=44218)
               0.078125 = fieldNorm(doc=1023)
         0.37542987 = weight(abstract_txt:query in 1023) [ClassicSimilarity], result of:
           0.37542987 = score(doc=1023,freq=8.0), product of:
             0.35740128 = queryWeight, product of:
               3.9985344 = boost
               4.7537646 = idf(docFreq=1035, maxDocs=44218)
               0.018802587 = queryNorm
             1.0504435 = fieldWeight in 1023, product of:
               2.828427 = tf(freq=8.0), with freq of:
                 8.0 = termFreq=8.0
               4.7537646 = idf(docFreq=1035, maxDocs=44218)
               0.078125 = fieldNorm(doc=1023)
       0.32 = coord(8/25)
   

2. Wu, M.; Hawking, D.; Turpin, A.; Scholer, F.: Using anchor text for homepage and topic distillation search tasks (2012) 0.26

   0.26019925 = sum of:
     0.26019925 = product of:
       0.72277564 = sum of:
         0.029643528 = weight(abstract_txt:relevance in 257) [ClassicSimilarity], result of:
           0.029643528 = score(doc=257,freq=1.0), product of:
             0.09617013 = queryWeight, product of:
               1.0370815 = boost
               4.931848 = idf(docFreq=866, maxDocs=44218)
               0.018802587 = queryNorm
             0.3082405 = fieldWeight in 257, 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=257)
         0.027114205 = weight(abstract_txt:results in 257) [ClassicSimilarity], result of:
           0.027114205 = score(doc=257,freq=3.0), product of:
             0.071924165 = queryWeight, product of:
               1.0984387 = boost
               3.482422 = idf(docFreq=3693, maxDocs=44218)
               0.018802587 = queryNorm
             0.37698326 = fieldWeight in 257, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.482422 = idf(docFreq=3693, maxDocs=44218)
               0.0625 = fieldNorm(doc=257)
         0.044444446 = weight(abstract_txt:search in 257) [ClassicSimilarity], result of:
           0.044444446 = score(doc=257,freq=6.0), product of:
             0.07936187 = queryWeight, product of:
               1.1538367 = boost
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.018802587 = queryNorm
             0.56002265 = fieldWeight in 257, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.0625 = fieldNorm(doc=257)
         0.03662695 = weight(abstract_txt:each in 257) [ClassicSimilarity], result of:
           0.03662695 = score(doc=257,freq=2.0), product of:
             0.10061001 = queryWeight, product of:
               1.2991492 = boost
               4.118742 = idf(docFreq=1954, maxDocs=44218)
               0.018802587 = queryNorm
             0.36404878 = fieldWeight in 257, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.118742 = idf(docFreq=1954, maxDocs=44218)
               0.0625 = fieldNorm(doc=257)
         0.059841685 = weight(abstract_txt:combining in 257) [ClassicSimilarity], result of:
           0.059841685 = score(doc=257,freq=1.0), product of:
             0.15361117 = queryWeight, product of:
               1.3107027 = boost
               6.2330556 = idf(docFreq=235, maxDocs=44218)
               0.018802587 = queryNorm
             0.38956597 = fieldWeight in 257, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.2330556 = idf(docFreq=235, maxDocs=44218)
               0.0625 = fieldNorm(doc=257)
         0.06373211 = weight(abstract_txt:method in 257) [ClassicSimilarity], result of:
           0.06373211 = score(doc=257,freq=2.0), product of:
             0.16019875 = queryWeight, product of:
               1.8929422 = boost
               4.50095 = idf(docFreq=1333, maxDocs=44218)
               0.018802587 = queryNorm
             0.3978315 = fieldWeight in 257, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.50095 = idf(docFreq=1333, maxDocs=44218)
               0.0625 = fieldNorm(doc=257)
         0.05469926 = weight(abstract_txt:term in 257) [ClassicSimilarity], result of:
           0.05469926 = score(doc=257,freq=1.0), product of:
             0.18228512 = queryWeight, product of:
               2.019219 = boost
               4.8012047 = idf(docFreq=987, maxDocs=44218)
               0.018802587 = queryNorm
             0.3000753 = fieldWeight in 257, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.8012047 = idf(docFreq=987, maxDocs=44218)
               0.0625 = fieldNorm(doc=257)
         0.24360129 = weight(abstract_txt:fusion in 257) [ClassicSimilarity], result of:
           0.24360129 = score(doc=257,freq=2.0), product of:
             0.35581732 = queryWeight, product of:
               2.4431603 = boost
               7.7456436 = idf(docFreq=51, maxDocs=44218)
               0.018802587 = queryNorm
             0.6846246 = fieldWeight in 257, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.7456436 = idf(docFreq=51, maxDocs=44218)
               0.0625 = fieldNorm(doc=257)
         0.16307218 = weight(abstract_txt:evidence in 257) [ClassicSimilarity], result of:
           0.16307218 = score(doc=257,freq=2.0), product of:
             0.34306043 = queryWeight, product of:
               3.3926475 = boost
               5.377919 = idf(docFreq=554, maxDocs=44218)
               0.018802587 = queryNorm
             0.47534537 = fieldWeight in 257, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.377919 = idf(docFreq=554, maxDocs=44218)
               0.0625 = fieldNorm(doc=257)
       0.36 = coord(9/25)
   

3. Efthimiadis, E.N.: Interactive query expansion : a user-based evaluation in a relevance feedback environment (2000) 0.23

   0.2292712 = sum of:
     0.2292712 = product of:
       0.7164725 = sum of:
         0.01033515 = weight(abstract_txt:research in 5701) [ClassicSimilarity], result of:
           0.01033515 = score(doc=5701,freq=1.0), product of:
             0.059610553 = queryWeight, product of:
               3.170338 = idf(docFreq=5046, maxDocs=44218)
               0.018802587 = queryNorm
             0.17337786 = fieldWeight in 5701, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.170338 = idf(docFreq=5046, maxDocs=44218)
               0.0546875 = fieldNorm(doc=5701)
         0.044926085 = weight(abstract_txt:relevance in 5701) [ClassicSimilarity], result of:
           0.044926085 = score(doc=5701,freq=3.0), product of:
             0.09617013 = queryWeight, product of:
               1.0370815 = boost
               4.931848 = idf(docFreq=866, maxDocs=44218)
               0.018802587 = queryNorm
             0.46715218 = fieldWeight in 5701, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.931848 = idf(docFreq=866, maxDocs=44218)
               0.0546875 = fieldNorm(doc=5701)
         0.02372493 = weight(abstract_txt:results in 5701) [ClassicSimilarity], result of:
           0.02372493 = score(doc=5701,freq=3.0), product of:
             0.071924165 = queryWeight, product of:
               1.0984387 = boost
               3.482422 = idf(docFreq=3693, maxDocs=44218)
               0.018802587 = queryNorm
             0.32986036 = fieldWeight in 5701, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.482422 = idf(docFreq=3693, maxDocs=44218)
               0.0546875 = fieldNorm(doc=5701)
         0.035319492 = weight(abstract_txt:alternative in 5701) [ClassicSimilarity], result of:
           0.035319492 = score(doc=5701,freq=1.0), product of:
             0.1181475 = queryWeight, product of:
               1.1494896 = boost
               5.466406 = idf(docFreq=507, maxDocs=44218)
               0.018802587 = queryNorm
             0.29894406 = fieldWeight in 5701, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.466406 = idf(docFreq=507, maxDocs=44218)
               0.0546875 = fieldNorm(doc=5701)
         0.022452509 = weight(abstract_txt:search in 5701) [ClassicSimilarity], result of:
           0.022452509 = score(doc=5701,freq=2.0), product of:
             0.07936187 = queryWeight, product of:
               1.1538367 = boost
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.018802587 = queryNorm
             0.28291306 = fieldWeight in 5701, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.6580524 = idf(docFreq=3098, maxDocs=44218)
               0.0546875 = fieldNorm(doc=5701)
         0.0957237 = weight(abstract_txt:term in 5701) [ClassicSimilarity], result of:
           0.0957237 = score(doc=5701,freq=4.0), product of:
             0.18228512 = queryWeight, product of:
               2.019219 = boost
               4.8012047 = idf(docFreq=987, maxDocs=44218)
               0.018802587 = 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)
         0.10089578 = weight(abstract_txt:evidence in 5701) [ClassicSimilarity], result of:
           0.10089578 = score(doc=5701,freq=1.0), product of:
             0.34306043 = queryWeight, product of:
               3.3926475 = boost
               5.377919 = idf(docFreq=554, maxDocs=44218)
               0.018802587 = queryNorm
             0.29410496 = fieldWeight in 5701, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.377919 = idf(docFreq=554, maxDocs=44218)
               0.0546875 = fieldNorm(doc=5701)
         0.38309482 = weight(abstract_txt:query in 5701) [ClassicSimilarity], result of:
           0.38309482 = score(doc=5701,freq=17.0), product of:
             0.35740128 = queryWeight, product of:
               3.9985344 = boost
               4.7537646 = idf(docFreq=1035, maxDocs=44218)
               0.018802587 = 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)
       0.32 = coord(8/25)
   

4. Moffat, A.; Zobel, J.: Self-indexing inverted files for fast text retrieval (1996) 0.22

   0.22347113 = sum of:
     0.22347113 = product of:
       0.69834733 = sum of:
         0.03662695 = weight(abstract_txt:each in 9) [ClassicSimilarity], result of:
           0.03662695 = score(doc=9,freq=2.0), product of:
             0.10061001 = queryWeight, product of:
               1.2991492 = boost
               4.118742 = idf(docFreq=1954, maxDocs=44218)
               0.018802587 = queryNorm
             0.36404878 = fieldWeight in 9, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.118742 = idf(docFreq=1954, maxDocs=44218)
               0.0625 = fieldNorm(doc=9)
         0.05877018 = weight(abstract_txt:costs in 9) [ClassicSimilarity], result of:
           0.05877018 = score(doc=9,freq=1.0), product of:
             0.15177198 = queryWeight, product of:
               1.3028325 = boost
               6.195629 = idf(docFreq=244, maxDocs=44218)
               0.018802587 = queryNorm
             0.38722682 = fieldWeight in 9, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.195629 = idf(docFreq=244, maxDocs=44218)
               0.0625 = fieldNorm(doc=9)
         0.07515757 = weight(abstract_txt:previous in 9) [ClassicSimilarity], result of:
           0.07515757 = score(doc=9,freq=2.0), product of:
             0.1624635 = queryWeight, product of:
               1.6508831 = boost
               5.2338576 = idf(docFreq=640, maxDocs=44218)
               0.018802587 = queryNorm
             0.46261203 = fieldWeight in 9, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.2338576 = idf(docFreq=640, maxDocs=44218)
               0.0625 = fieldNorm(doc=9)
         0.045065407 = weight(abstract_txt:method in 9) [ClassicSimilarity], result of:
           0.045065407 = score(doc=9,freq=1.0), product of:
             0.16019875 = queryWeight, product of:
               1.8929422 = boost
               4.50095 = idf(docFreq=1333, maxDocs=44218)
               0.018802587 = queryNorm
             0.28130937 = fieldWeight in 9, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.50095 = idf(docFreq=1333, maxDocs=44218)
               0.0625 = fieldNorm(doc=9)
         0.05469926 = weight(abstract_txt:term in 9) [ClassicSimilarity], result of:
           0.05469926 = score(doc=9,freq=1.0), product of:
             0.18228512 = queryWeight, product of:
               2.019219 = boost
               4.8012047 = idf(docFreq=987, maxDocs=44218)
               0.018802587 = queryNorm
             0.3000753 = fieldWeight in 9, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.8012047 = idf(docFreq=987, maxDocs=44218)
               0.0625 = fieldNorm(doc=9)
         0.11833885 = weight(abstract_txt:time in 9) [ClassicSimilarity], result of:
           0.11833885 = score(doc=9,freq=5.0), product of:
             0.20412157 = queryWeight, product of:
               2.6169648 = boost
               4.148331 = idf(docFreq=1897, maxDocs=44218)
               0.018802587 = queryNorm
             0.5797469 = fieldWeight in 9, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               4.148331 = idf(docFreq=1897, maxDocs=44218)
               0.0625 = fieldNorm(doc=9)
         0.12576683 = weight(abstract_txt:processing in 9) [ClassicSimilarity], result of:
           0.12576683 = score(doc=9,freq=2.0), product of:
             0.28851035 = queryWeight, product of:
               3.1112442 = boost
               4.931848 = idf(docFreq=866, maxDocs=44218)
               0.018802587 = queryNorm
             0.43591788 = fieldWeight in 9, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.931848 = idf(docFreq=866, maxDocs=44218)
               0.0625 = fieldNorm(doc=9)
         0.18392232 = weight(abstract_txt:query in 9) [ClassicSimilarity], result of:
           0.18392232 = score(doc=9,freq=3.0), product of:
             0.35740128 = queryWeight, product of:
               3.9985344 = boost
               4.7537646 = idf(docFreq=1035, maxDocs=44218)
               0.018802587 = queryNorm
             0.5146101 = fieldWeight in 9, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.7537646 = idf(docFreq=1035, maxDocs=44218)
               0.0625 = fieldNorm(doc=9)
       0.32 = coord(8/25)
   

5. Wei, F.; Li, W.; Liu, S.: iRANK: a rank-learn-combine framework for unsupervised ensemble ranking (2010) 0.21

   0.21248287 = sum of:
     0.21248287 = product of:
       0.7588674 = sum of:
         0.029622748 = weight(abstract_txt:providing in 3472) [ClassicSimilarity], result of:
           0.029622748 = score(doc=3472,freq=1.0), product of:
             0.09612518 = queryWeight, product of:
               1.0368391 = boost
               4.9306955 = idf(docFreq=867, maxDocs=44218)
               0.018802587 = queryNorm
             0.30816847 = fieldWeight in 3472, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.9306955 = idf(docFreq=867, maxDocs=44218)
               0.0625 = fieldNorm(doc=3472)
         0.027114205 = weight(abstract_txt:results in 3472) [ClassicSimilarity], result of:
           0.027114205 = score(doc=3472,freq=3.0), product of:
             0.071924165 = queryWeight, product of:
               1.0984387 = boost
               3.482422 = idf(docFreq=3693, maxDocs=44218)
               0.018802587 = queryNorm
             0.37698326 = fieldWeight in 3472, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.482422 = idf(docFreq=3693, maxDocs=44218)
               0.0625 = fieldNorm(doc=3472)
         0.03662695 = weight(abstract_txt:each in 3472) [ClassicSimilarity], result of:
           0.03662695 = score(doc=3472,freq=2.0), product of:
             0.10061001 = queryWeight, product of:
               1.2991492 = boost
               4.118742 = idf(docFreq=1954, maxDocs=44218)
               0.018802587 = queryNorm
             0.36404878 = fieldWeight in 3472, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.118742 = idf(docFreq=1954, maxDocs=44218)
               0.0625 = fieldNorm(doc=3472)
         0.086588055 = weight(abstract_txt:learn in 3472) [ClassicSimilarity], result of:
           0.086588055 = score(doc=3472,freq=2.0), product of:
             0.15597282 = queryWeight, product of:
               1.3207397 = boost
               6.280787 = idf(docFreq=224, maxDocs=44218)
               0.018802587 = queryNorm
             0.55514836 = fieldWeight in 3472, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.280787 = idf(docFreq=224, maxDocs=44218)
               0.0625 = fieldNorm(doc=3472)
         0.3004757 = weight(abstract_txt:ranking in 3472) [ClassicSimilarity], result of:
           0.3004757 = score(doc=3472,freq=12.0), product of:
             0.2478807 = queryWeight, product of:
               2.354665 = boost
               5.598813 = idf(docFreq=444, maxDocs=44218)
               0.018802587 = queryNorm
             1.2121786 = fieldWeight in 3472, product of:
               3.4641016 = tf(freq=12.0), with freq of:
                 12.0 = termFreq=12.0
               5.598813 = idf(docFreq=444, maxDocs=44218)
               0.0625 = fieldNorm(doc=3472)
         0.17225213 = weight(abstract_txt:fusion in 3472) [ClassicSimilarity], result of:
           0.17225213 = score(doc=3472,freq=1.0), product of:
             0.35581732 = queryWeight, product of:
               2.4431603 = boost
               7.7456436 = idf(docFreq=51, maxDocs=44218)
               0.018802587 = queryNorm
             0.48410273 = fieldWeight in 3472, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.7456436 = idf(docFreq=51, maxDocs=44218)
               0.0625 = fieldNorm(doc=3472)
         0.1061876 = weight(abstract_txt:query in 3472) [ClassicSimilarity], result of:
           0.1061876 = score(doc=3472,freq=1.0), product of:
             0.35740128 = queryWeight, product of:
               3.9985344 = boost
               4.7537646 = idf(docFreq=1035, maxDocs=44218)
               0.018802587 = queryNorm
             0.2971103 = fieldWeight in 3472, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.7537646 = idf(docFreq=1035, maxDocs=44218)
               0.0625 = fieldNorm(doc=3472)
       0.28 = coord(7/25)