Document (#43218)

Author

Hammache, A.
Boughanem, M.

Title

Term position-based language model for information retrieval

Source

Journal of the Association for Information Science and Technology. 72(2021) no.5, S.627-642

Year

2021

Abstract

Term position feature is widely and successfully used in IR and Web search engines, to enhance the retrieval effectiveness. This feature is essentially used for two purposes: to capture query terms proximity or to boost the weight of terms appearing in some parts of a document. In this paper, we are interested in this second category. We propose two novel query-independent techniques based on absolute term positions in a document, whose goal is to boost the weight of terms appearing in the beginning of a document. The first one considers only the earliest occurrence of a term in a document. The second one takes into account all term positions in a document. We formalize each of these two techniques as a document model based on term position, and then we incorporate it into a basic language model (LM). Two smoothing techniques, Dirichlet and Jelinek-Mercer, are considered in the basic LM. Experiments conducted on three TREC test collections show that our model, especially the version based on all term positions, achieves significant improvements over the baseline LMs, and it also often performs better than two state-of-the-art baseline models, the chronological term rank model and the Markov random field model.

Content

Vgl.: https://asistdl.onlinelibrary.wiley.com/doi/10.1002/asi.24431.

Theme

Retrievalalgorithmen

Similar documents (content)

1. Pan, M.; Huang, J.X.; He, T.; Mao, Z.; Ying, Z.; Tu, X.: ¬A simple kernel co-occurrence-based enhancement for pseudo-relevance feedback (2020) 0.32

   0.32445052 = sum of:
     0.32445052 = product of:
       0.90125144 = sum of:
         0.020111375 = weight(abstract_txt:language in 678) [ClassicSimilarity], result of:
           0.020111375 = score(doc=678,freq=1.0), product of:
             0.07714768 = queryWeight, product of:
               1.1171249 = boost
               4.1709876 = idf(docFreq=1863, maxDocs=44421)
               0.016557023 = queryNorm
             0.26068673 = fieldWeight in 678, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.1709876 = idf(docFreq=1863, maxDocs=44421)
               0.0625 = fieldNorm(doc=678)
         0.05957546 = weight(abstract_txt:query in 678) [ClassicSimilarity], result of:
           0.05957546 = score(doc=678,freq=4.0), product of:
             0.10024282 = queryWeight, product of:
               1.2734061 = boost
               4.754492 = idf(docFreq=1039, maxDocs=44421)
               0.016557023 = queryNorm
             0.5943115 = fieldWeight in 678, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.754492 = idf(docFreq=1039, maxDocs=44421)
               0.0625 = fieldNorm(doc=678)
         0.067333736 = weight(abstract_txt:terms in 678) [ClassicSimilarity], result of:
           0.067333736 = score(doc=678,freq=6.0), product of:
             0.10876691 = queryWeight, product of:
               1.6245546 = boost
               4.043712 = idf(docFreq=2116, maxDocs=44421)
               0.016557023 = queryNorm
             0.6190645 = fieldWeight in 678, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               4.043712 = idf(docFreq=2116, maxDocs=44421)
               0.0625 = fieldNorm(doc=678)
         0.030963954 = weight(abstract_txt:based in 678) [ClassicSimilarity], result of:
           0.030963954 = score(doc=678,freq=3.0), product of:
             0.08986051 = queryWeight, product of:
               1.7050602 = boost
               3.1830752 = idf(docFreq=5005, maxDocs=44421)
               0.016557023 = queryNorm
             0.344578 = fieldWeight in 678, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.1830752 = idf(docFreq=5005, maxDocs=44421)
               0.0625 = fieldNorm(doc=678)
         0.112192236 = weight(abstract_txt:weight in 678) [ClassicSimilarity], result of:
           0.112192236 = score(doc=678,freq=1.0), product of:
             0.242663 = queryWeight, product of:
               1.9812628 = boost
               7.3974023 = idf(docFreq=73, maxDocs=44421)
               0.016557023 = queryNorm
             0.46233764 = fieldWeight in 678, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.3974023 = idf(docFreq=73, maxDocs=44421)
               0.0625 = fieldNorm(doc=678)
         0.17161918 = weight(abstract_txt:boost in 678) [ClassicSimilarity], result of:
           0.17161918 = score(doc=678,freq=1.0), product of:
             0.32216045 = queryWeight, product of:
               2.282845 = boost
               8.523414 = idf(docFreq=23, maxDocs=44421)
               0.016557023 = queryNorm
             0.53271335 = fieldWeight in 678, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.523414 = idf(docFreq=23, maxDocs=44421)
               0.0625 = fieldNorm(doc=678)
         0.074288405 = weight(abstract_txt:model in 678) [ClassicSimilarity], result of:
           0.074288405 = score(doc=678,freq=2.0), product of:
             0.2110277 = queryWeight, product of:
               3.2001524 = boost
               3.9827821 = idf(docFreq=2249, maxDocs=44421)
               0.016557023 = queryNorm
             0.35203153 = fieldWeight in 678, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.9827821 = idf(docFreq=2249, maxDocs=44421)
               0.0625 = fieldNorm(doc=678)
         0.0658382 = weight(abstract_txt:document in 678) [ClassicSimilarity], result of:
           0.0658382 = score(doc=678,freq=1.0), product of:
             0.24531311 = queryWeight, product of:
               3.4503355 = boost
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.016557023 = queryNorm
             0.26838437 = fieldWeight in 678, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.0625 = fieldNorm(doc=678)
         0.29932886 = weight(abstract_txt:term in 678) [ClassicSimilarity], result of:
           0.29932886 = score(doc=678,freq=6.0), product of:
             0.40778413 = queryWeight, product of:
               5.136715 = boost
               4.794713 = idf(docFreq=998, maxDocs=44421)
               0.016557023 = queryNorm
             0.7340376 = fieldWeight in 678, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               4.794713 = idf(docFreq=998, maxDocs=44421)
               0.0625 = fieldNorm(doc=678)
       0.36 = coord(9/25)
   

2. Wang, Y.; Lee, J.-S.; Choi, I.-C.: Indexing by Latent Dirichlet Allocation and an Ensemble Model (2016) 0.26

   0.25901374 = sum of:
     0.25901374 = product of:
       0.7194826 = sum of:
         0.09788694 = weight(abstract_txt:dirichlet in 4019) [ClassicSimilarity], result of:
           0.09788694 = score(doc=4019,freq=1.0), product of:
             0.15155196 = queryWeight, product of:
               1.107149 = boost
               8.267481 = idf(docFreq=30, maxDocs=44421)
               0.016557023 = queryNorm
             0.6458969 = fieldWeight in 4019, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.267481 = idf(docFreq=30, maxDocs=44421)
               0.078125 = fieldNorm(doc=4019)
         0.02513922 = weight(abstract_txt:language in 4019) [ClassicSimilarity], result of:
           0.02513922 = score(doc=4019,freq=1.0), product of:
             0.07714768 = queryWeight, product of:
               1.1171249 = boost
               4.1709876 = idf(docFreq=1863, maxDocs=44421)
               0.016557023 = queryNorm
             0.3258584 = fieldWeight in 4019, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.1709876 = idf(docFreq=1863, maxDocs=44421)
               0.078125 = fieldNorm(doc=4019)
         0.13949363 = weight(abstract_txt:smoothing in 4019) [ClassicSimilarity], result of:
           0.13949363 = score(doc=4019,freq=1.0), product of:
             0.19191751 = queryWeight, product of:
               1.2458984 = boost
               9.303573 = idf(docFreq=10, maxDocs=44421)
               0.016557023 = queryNorm
             0.7268416 = fieldWeight in 4019, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.303573 = idf(docFreq=10, maxDocs=44421)
               0.078125 = fieldNorm(doc=4019)
         0.0426038 = weight(abstract_txt:basic in 4019) [ClassicSimilarity], result of:
           0.0426038 = score(doc=4019,freq=1.0), product of:
             0.10966142 = queryWeight, product of:
               1.3318865 = boost
               4.972839 = idf(docFreq=835, maxDocs=44421)
               0.016557023 = queryNorm
             0.38850304 = fieldWeight in 4019, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.972839 = idf(docFreq=835, maxDocs=44421)
               0.078125 = fieldNorm(doc=4019)
         0.043876406 = weight(abstract_txt:second in 4019) [ClassicSimilarity], result of:
           0.043876406 = score(doc=4019,freq=1.0), product of:
             0.111834474 = queryWeight, product of:
               1.3450181 = boost
               5.021868 = idf(docFreq=795, maxDocs=44421)
               0.016557023 = queryNorm
             0.39233345 = fieldWeight in 4019, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.021868 = idf(docFreq=795, maxDocs=44421)
               0.078125 = fieldNorm(doc=4019)
         0.038704943 = weight(abstract_txt:based in 4019) [ClassicSimilarity], result of:
           0.038704943 = score(doc=4019,freq=3.0), product of:
             0.08986051 = queryWeight, product of:
               1.7050602 = boost
               3.1830752 = idf(docFreq=5005, maxDocs=44421)
               0.016557023 = queryNorm
             0.4307225 = fieldWeight in 4019, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.1830752 = idf(docFreq=5005, maxDocs=44421)
               0.078125 = fieldNorm(doc=4019)
         0.048375983 = weight(abstract_txt:techniques in 4019) [ClassicSimilarity], result of:
           0.048375983 = score(doc=4019,freq=1.0), product of:
             0.13662766 = queryWeight, product of:
               1.8207706 = boost
               4.5321174 = idf(docFreq=1298, maxDocs=44421)
               0.016557023 = queryNorm
             0.35407168 = fieldWeight in 4019, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.5321174 = idf(docFreq=1298, maxDocs=44421)
               0.078125 = fieldNorm(doc=4019)
         0.06566229 = weight(abstract_txt:model in 4019) [ClassicSimilarity], result of:
           0.06566229 = score(doc=4019,freq=1.0), product of:
             0.2110277 = queryWeight, product of:
               3.2001524 = boost
               3.9827821 = idf(docFreq=2249, maxDocs=44421)
               0.016557023 = queryNorm
             0.31115484 = fieldWeight in 4019, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9827821 = idf(docFreq=2249, maxDocs=44421)
               0.078125 = fieldNorm(doc=4019)
         0.21773939 = weight(abstract_txt:document in 4019) [ClassicSimilarity], result of:
           0.21773939 = score(doc=4019,freq=7.0), product of:
             0.24531311 = queryWeight, product of:
               3.4503355 = boost
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.016557023 = queryNorm
             0.88759786 = fieldWeight in 4019, product of:
               2.6457512 = tf(freq=7.0), with freq of:
                 7.0 = termFreq=7.0
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.078125 = fieldNorm(doc=4019)
       0.36 = coord(9/25)
   

3. Keikha, M.; Crestani, F.; Carman, M.J.: Employing document dependency in blog search (2012) 0.26

   0.25595203 = sum of:
     0.25595203 = product of:
       0.71097785 = sum of:
         0.020111375 = weight(abstract_txt:language in 987) [ClassicSimilarity], result of:
           0.020111375 = score(doc=987,freq=1.0), product of:
             0.07714768 = queryWeight, product of:
               1.1171249 = boost
               4.1709876 = idf(docFreq=1863, maxDocs=44421)
               0.016557023 = queryNorm
             0.26068673 = fieldWeight in 987, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.1709876 = idf(docFreq=1863, maxDocs=44421)
               0.0625 = fieldNorm(doc=987)
         0.22318982 = weight(abstract_txt:smoothing in 987) [ClassicSimilarity], result of:
           0.22318982 = score(doc=987,freq=4.0), product of:
             0.19191751 = queryWeight, product of:
               1.2458984 = boost
               9.303573 = idf(docFreq=10, maxDocs=44421)
               0.016557023 = queryNorm
             1.1629466 = fieldWeight in 987, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               9.303573 = idf(docFreq=10, maxDocs=44421)
               0.0625 = fieldNorm(doc=987)
         0.02978773 = weight(abstract_txt:query in 987) [ClassicSimilarity], result of:
           0.02978773 = score(doc=987,freq=1.0), product of:
             0.10024282 = queryWeight, product of:
               1.2734061 = boost
               4.754492 = idf(docFreq=1039, maxDocs=44421)
               0.016557023 = queryNorm
             0.29715574 = fieldWeight in 987, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.754492 = idf(docFreq=1039, maxDocs=44421)
               0.0625 = fieldNorm(doc=987)
         0.035101123 = weight(abstract_txt:second in 987) [ClassicSimilarity], result of:
           0.035101123 = score(doc=987,freq=1.0), product of:
             0.111834474 = queryWeight, product of:
               1.3450181 = boost
               5.021868 = idf(docFreq=795, maxDocs=44421)
               0.016557023 = queryNorm
             0.31386676 = fieldWeight in 987, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.021868 = idf(docFreq=795, maxDocs=44421)
               0.0625 = fieldNorm(doc=987)
         0.035754092 = weight(abstract_txt:based in 987) [ClassicSimilarity], result of:
           0.035754092 = score(doc=987,freq=4.0), product of:
             0.08986051 = queryWeight, product of:
               1.7050602 = boost
               3.1830752 = idf(docFreq=5005, maxDocs=44421)
               0.016557023 = queryNorm
             0.3978844 = fieldWeight in 987, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               3.1830752 = idf(docFreq=5005, maxDocs=44421)
               0.0625 = fieldNorm(doc=987)
         0.038700785 = weight(abstract_txt:techniques in 987) [ClassicSimilarity], result of:
           0.038700785 = score(doc=987,freq=1.0), product of:
             0.13662766 = queryWeight, product of:
               1.8207706 = boost
               4.5321174 = idf(docFreq=1298, maxDocs=44421)
               0.016557023 = queryNorm
             0.28325734 = fieldWeight in 987, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.5321174 = idf(docFreq=1298, maxDocs=44421)
               0.0625 = fieldNorm(doc=987)
         0.08967719 = weight(abstract_txt:baseline in 987) [ClassicSimilarity], result of:
           0.08967719 = score(doc=987,freq=1.0), product of:
             0.20900165 = queryWeight, product of:
               1.838718 = boost
               6.8651857 = idf(docFreq=125, maxDocs=44421)
               0.016557023 = queryNorm
             0.4290741 = fieldWeight in 987, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.8651857 = idf(docFreq=125, maxDocs=44421)
               0.0625 = fieldNorm(doc=987)
         0.0658382 = weight(abstract_txt:document in 987) [ClassicSimilarity], result of:
           0.0658382 = score(doc=987,freq=1.0), product of:
             0.24531311 = queryWeight, product of:
               3.4503355 = boost
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.016557023 = queryNorm
             0.26838437 = fieldWeight in 987, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.0625 = fieldNorm(doc=987)
         0.17281759 = weight(abstract_txt:term in 987) [ClassicSimilarity], result of:
           0.17281759 = score(doc=987,freq=2.0), product of:
             0.40778413 = queryWeight, product of:
               5.136715 = boost
               4.794713 = idf(docFreq=998, maxDocs=44421)
               0.016557023 = queryNorm
             0.42379674 = fieldWeight in 987, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.794713 = idf(docFreq=998, maxDocs=44421)
               0.0625 = fieldNorm(doc=987)
       0.36 = coord(9/25)
   

4. Ye, Z.; Huang, J.X.; Lin, H.: Finding a good query-related topic for boosting pseudo-relevance feedback (2011) 0.25

   0.25050974 = sum of:
     0.25050974 = product of:
       0.6958604 = sum of:
         0.057702757 = weight(abstract_txt:achieves in 372) [ClassicSimilarity], result of:
           0.057702757 = score(doc=372,freq=1.0), product of:
             0.12363727 = queryWeight, product of:
               7.467361 = idf(docFreq=68, maxDocs=44421)
               0.016557023 = queryNorm
             0.46671006 = fieldWeight in 372, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.467361 = idf(docFreq=68, maxDocs=44421)
               0.0625 = fieldNorm(doc=372)
         0.07830956 = weight(abstract_txt:dirichlet in 372) [ClassicSimilarity], result of:
           0.07830956 = score(doc=372,freq=1.0), product of:
             0.15155196 = queryWeight, product of:
               1.107149 = boost
               8.267481 = idf(docFreq=30, maxDocs=44421)
               0.016557023 = queryNorm
             0.51671755 = fieldWeight in 372, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.267481 = idf(docFreq=30, maxDocs=44421)
               0.0625 = fieldNorm(doc=372)
         0.020111375 = weight(abstract_txt:language in 372) [ClassicSimilarity], result of:
           0.020111375 = score(doc=372,freq=1.0), product of:
             0.07714768 = queryWeight, product of:
               1.1171249 = boost
               4.1709876 = idf(docFreq=1863, maxDocs=44421)
               0.016557023 = queryNorm
             0.26068673 = fieldWeight in 372, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.1709876 = idf(docFreq=1863, maxDocs=44421)
               0.0625 = fieldNorm(doc=372)
         0.066607386 = weight(abstract_txt:query in 372) [ClassicSimilarity], result of:
           0.066607386 = score(doc=372,freq=5.0), product of:
             0.10024282 = queryWeight, product of:
               1.2734061 = boost
               4.754492 = idf(docFreq=1039, maxDocs=44421)
               0.016557023 = queryNorm
             0.6644604 = fieldWeight in 372, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               4.754492 = idf(docFreq=1039, maxDocs=44421)
               0.0625 = fieldNorm(doc=372)
         0.038875144 = weight(abstract_txt:terms in 372) [ClassicSimilarity], result of:
           0.038875144 = score(doc=372,freq=2.0), product of:
             0.10876691 = queryWeight, product of:
               1.6245546 = boost
               4.043712 = idf(docFreq=2116, maxDocs=44421)
               0.016557023 = queryNorm
             0.35741702 = fieldWeight in 372, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.043712 = idf(docFreq=2116, maxDocs=44421)
               0.0625 = fieldNorm(doc=372)
         0.039974295 = weight(abstract_txt:based in 372) [ClassicSimilarity], result of:
           0.039974295 = score(doc=372,freq=5.0), product of:
             0.08986051 = queryWeight, product of:
               1.7050602 = boost
               3.1830752 = idf(docFreq=5005, maxDocs=44421)
               0.016557023 = queryNorm
             0.4448483 = fieldWeight in 372, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               3.1830752 = idf(docFreq=5005, maxDocs=44421)
               0.0625 = fieldNorm(doc=372)
         0.17161918 = weight(abstract_txt:boost in 372) [ClassicSimilarity], result of:
           0.17161918 = score(doc=372,freq=1.0), product of:
             0.32216045 = queryWeight, product of:
               2.282845 = boost
               8.523414 = idf(docFreq=23, maxDocs=44421)
               0.016557023 = queryNorm
             0.53271335 = fieldWeight in 372, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.523414 = idf(docFreq=23, maxDocs=44421)
               0.0625 = fieldNorm(doc=372)
         0.09098434 = weight(abstract_txt:model in 372) [ClassicSimilarity], result of:
           0.09098434 = score(doc=372,freq=3.0), product of:
             0.2110277 = queryWeight, product of:
               3.2001524 = boost
               3.9827821 = idf(docFreq=2249, maxDocs=44421)
               0.016557023 = queryNorm
             0.4311488 = fieldWeight in 372, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.9827821 = idf(docFreq=2249, maxDocs=44421)
               0.0625 = fieldNorm(doc=372)
         0.1316764 = weight(abstract_txt:document in 372) [ClassicSimilarity], result of:
           0.1316764 = score(doc=372,freq=4.0), product of:
             0.24531311 = queryWeight, product of:
               3.4503355 = boost
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.016557023 = queryNorm
             0.53676873 = fieldWeight in 372, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.0625 = fieldNorm(doc=372)
       0.36 = coord(9/25)
   

5. Dang, E.K.F.; Luk, R.W.P.; Allan, J.; Ho, K.S.; Chung, K.F.L.; Lee, D.L.: ¬A new context-dependent term weight computed by boost and discount using relevance information (2010) 0.25

   0.24793568 = sum of:
     0.24793568 = product of:
       0.8854846 = sum of:
         0.02978773 = weight(abstract_txt:query in 120) [ClassicSimilarity], result of:
           0.02978773 = score(doc=120,freq=1.0), product of:
             0.10024282 = queryWeight, product of:
               1.2734061 = boost
               4.754492 = idf(docFreq=1039, maxDocs=44421)
               0.016557023 = queryNorm
             0.29715574 = fieldWeight in 120, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.754492 = idf(docFreq=1039, maxDocs=44421)
               0.0625 = fieldNorm(doc=120)
         0.038875144 = weight(abstract_txt:terms in 120) [ClassicSimilarity], result of:
           0.038875144 = score(doc=120,freq=2.0), product of:
             0.10876691 = queryWeight, product of:
               1.6245546 = boost
               4.043712 = idf(docFreq=2116, maxDocs=44421)
               0.016557023 = queryNorm
             0.35741702 = fieldWeight in 120, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.043712 = idf(docFreq=2116, maxDocs=44421)
               0.0625 = fieldNorm(doc=120)
         0.15532546 = weight(abstract_txt:baseline in 120) [ClassicSimilarity], result of:
           0.15532546 = score(doc=120,freq=3.0), product of:
             0.20900165 = queryWeight, product of:
               1.838718 = boost
               6.8651857 = idf(docFreq=125, maxDocs=44421)
               0.016557023 = queryNorm
             0.7431781 = fieldWeight in 120, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               6.8651857 = idf(docFreq=125, maxDocs=44421)
               0.0625 = fieldNorm(doc=120)
         0.17161918 = weight(abstract_txt:boost in 120) [ClassicSimilarity], result of:
           0.17161918 = score(doc=120,freq=1.0), product of:
             0.32216045 = queryWeight, product of:
               2.282845 = boost
               8.523414 = idf(docFreq=23, maxDocs=44421)
               0.016557023 = queryNorm
             0.53271335 = fieldWeight in 120, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.523414 = idf(docFreq=23, maxDocs=44421)
               0.0625 = fieldNorm(doc=120)
         0.052529834 = weight(abstract_txt:model in 120) [ClassicSimilarity], result of:
           0.052529834 = score(doc=120,freq=1.0), product of:
             0.2110277 = queryWeight, product of:
               3.2001524 = boost
               3.9827821 = idf(docFreq=2249, maxDocs=44421)
               0.016557023 = queryNorm
             0.24892388 = fieldWeight in 120, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9827821 = idf(docFreq=2249, maxDocs=44421)
               0.0625 = fieldNorm(doc=120)
         0.11403511 = weight(abstract_txt:document in 120) [ClassicSimilarity], result of:
           0.11403511 = score(doc=120,freq=3.0), product of:
             0.24531311 = queryWeight, product of:
               3.4503355 = boost
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.016557023 = queryNorm
             0.46485534 = fieldWeight in 120, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.0625 = fieldNorm(doc=120)
         0.3233121 = weight(abstract_txt:term in 120) [ClassicSimilarity], result of:
           0.3233121 = score(doc=120,freq=7.0), product of:
             0.40778413 = queryWeight, product of:
               5.136715 = boost
               4.794713 = idf(docFreq=998, maxDocs=44421)
               0.016557023 = queryNorm
             0.7928511 = fieldWeight in 120, product of:
               2.6457512 = tf(freq=7.0), with freq of:
                 7.0 = termFreq=7.0
               4.794713 = idf(docFreq=998, maxDocs=44421)
               0.0625 = fieldNorm(doc=120)
       0.28 = coord(7/25)