Document (#13231)

Author

Losee, R.M.

Title

Evaluating retrieval performance given database and query characteristics : analytic determination of performance surfaces

Source

Journal of the American Society for Information Science. 47(1996) no.1, S.95-105

Year

1996

Abstract

An analytic method of information retrieval and filtering evaluation can quantitatively predict the expected number of documents examined in retrieving a relevant document. It also allows researchers and practioners to qualitatively understand how varying different estimates of query parameter values affects retrieval performance. The incoorporation of relevance feedback to increase our knowledge about the parameters of relevant documents and the robustness of parameter estimates is modeled. Single term and two term independence models, as well as a complete term dependence model, are developed. An economic model of retrieval performance may be used to study the effects of database size and to provide analytic answers to questions comparing retrieval from small and large databases, as well as questions about the number of terms in a query. Results are presented as a performance surface, a three dimensional graph showing the effects of two independent variables on performance.

Theme

Retrievalstudien

Similar documents (author)

1. Losee, R.M.: ¬A Gray code based ordering for documents on shelves : classification for browsing and retrieval (1992) 5.19

   5.187669 = sum of:
     5.187669 = weight(author_txt:losee in 2334) [ClassicSimilarity], result of:
       5.187669 = fieldWeight in 2334, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.30027 = idf(docFreq=29, maxDocs=44421)
         0.625 = fieldNorm(doc=2334)
   

2. Losee, R.M.: ¬The relative shelf location of circulated books : a study of classification, users, and browsing (1993) 5.19

   5.187669 = sum of:
     5.187669 = weight(author_txt:losee in 4484) [ClassicSimilarity], result of:
       5.187669 = fieldWeight in 4484, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.30027 = idf(docFreq=29, maxDocs=44421)
         0.625 = fieldNorm(doc=4484)
   

3. Losee, R.M.: Seven fundamental questions for the science of library classification (1993) 5.19

   5.187669 = sum of:
     5.187669 = weight(author_txt:losee in 4507) [ClassicSimilarity], result of:
       5.187669 = fieldWeight in 4507, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.30027 = idf(docFreq=29, maxDocs=44421)
         0.625 = fieldNorm(doc=4507)
   

4. Losee, R.M.: Term dependence : truncating the Bahadur Lazarsfeld expansion (1994) 5.19

   5.187669 = sum of:
     5.187669 = weight(author_txt:losee in 7389) [ClassicSimilarity], result of:
       5.187669 = fieldWeight in 7389, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.30027 = idf(docFreq=29, maxDocs=44421)
         0.625 = fieldNorm(doc=7389)
   

5. Losee, R.M.: Upper bounds for retrieval performance and their user measuring performance and generating optimal queries : can it get any better than this? (1994) 5.19

   5.187669 = sum of:
     5.187669 = weight(author_txt:losee in 7417) [ClassicSimilarity], result of:
       5.187669 = fieldWeight in 7417, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.30027 = idf(docFreq=29, maxDocs=44421)
         0.625 = fieldNorm(doc=7417)
   

Similar documents (content)

1. Losee, R.M.: Determining information retrieval and filtering performance without experimentation (1995) 0.60

   0.59616303 = sum of:
     0.59616303 = product of:
       1.354916 = sum of:
         0.025666876 = weight(abstract_txt:well in 3436) [ClassicSimilarity], result of:
           0.025666876 = score(doc=3436,freq=1.0), product of:
             0.0841853 = queryWeight, product of:
               1.0452244 = boost
               3.9025342 = idf(docFreq=2437, maxDocs=44421)
               0.020638589 = queryNorm
             0.30488548 = fieldWeight in 3436, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9025342 = idf(docFreq=2437, maxDocs=44421)
               0.078125 = fieldNorm(doc=3436)
         0.025928456 = weight(abstract_txt:about in 3436) [ClassicSimilarity], result of:
           0.025928456 = score(doc=3436,freq=1.0), product of:
             0.08475631 = queryWeight, product of:
               1.0487632 = boost
               3.9157467 = idf(docFreq=2405, maxDocs=44421)
               0.020638589 = queryNorm
             0.3059177 = fieldWeight in 3436, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9157467 = idf(docFreq=2405, maxDocs=44421)
               0.078125 = fieldNorm(doc=3436)
         0.10809567 = weight(abstract_txt:independence in 3436) [ClassicSimilarity], result of:
           0.10809567 = score(doc=3436,freq=1.0), product of:
             0.17425413 = queryWeight, product of:
               1.0633298 = boost
               7.9402676 = idf(docFreq=42, maxDocs=44421)
               0.020638589 = queryNorm
             0.62033343 = fieldWeight in 3436, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.9402676 = idf(docFreq=42, maxDocs=44421)
               0.078125 = fieldNorm(doc=3436)
         0.047255587 = weight(abstract_txt:model in 3436) [ClassicSimilarity], result of:
           0.047255587 = score(doc=3436,freq=3.0), product of:
             0.08768311 = queryWeight, product of:
               1.0667175 = boost
               3.9827821 = idf(docFreq=2249, maxDocs=44421)
               0.020638589 = queryNorm
             0.538936 = fieldWeight in 3436, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.9827821 = idf(docFreq=2249, maxDocs=44421)
               0.078125 = fieldNorm(doc=3436)
         0.033893537 = weight(abstract_txt:database in 3436) [ClassicSimilarity], result of:
           0.033893537 = score(doc=3436,freq=1.0), product of:
             0.10132864 = queryWeight, product of:
               1.1467204 = boost
               4.2814875 = idf(docFreq=1668, maxDocs=44421)
               0.020638589 = queryNorm
             0.3344912 = fieldWeight in 3436, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.2814875 = idf(docFreq=1668, maxDocs=44421)
               0.078125 = fieldNorm(doc=3436)
         0.12058607 = weight(abstract_txt:query in 3436) [ClassicSimilarity], result of:
           0.12058607 = score(doc=3436,freq=3.0), product of:
             0.1874314 = queryWeight, product of:
               1.9101093 = boost
               4.754492 = idf(docFreq=1039, maxDocs=44421)
               0.020638589 = queryNorm
             0.6433611 = fieldWeight in 3436, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.754492 = idf(docFreq=1039, maxDocs=44421)
               0.078125 = fieldNorm(doc=3436)
         0.14280452 = weight(abstract_txt:term in 3436) [ClassicSimilarity], result of:
           0.14280452 = score(doc=3436,freq=4.0), product of:
             0.190616 = queryWeight, product of:
               1.9262681 = boost
               4.794713 = idf(docFreq=998, maxDocs=44421)
               0.020638589 = queryNorm
             0.7491739 = fieldWeight in 3436, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.794713 = idf(docFreq=998, maxDocs=44421)
               0.078125 = fieldNorm(doc=3436)
         0.18765756 = weight(abstract_txt:parameter in 3436) [ClassicSimilarity], result of:
           0.18765756 = score(doc=3436,freq=1.0), product of:
             0.31712586 = queryWeight, product of:
               2.0286505 = boost
               7.574333 = idf(docFreq=61, maxDocs=44421)
               0.020638589 = queryNorm
             0.5917448 = fieldWeight in 3436, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.574333 = idf(docFreq=61, maxDocs=44421)
               0.078125 = fieldNorm(doc=3436)
         0.09072555 = weight(abstract_txt:retrieval in 3436) [ClassicSimilarity], result of:
           0.09072555 = score(doc=3436,freq=4.0), product of:
             0.16701956 = queryWeight, product of:
               2.327797 = boost
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.020638589 = queryNorm
             0.5432031 = fieldWeight in 3436, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.078125 = fieldNorm(doc=3436)
         0.31683075 = weight(abstract_txt:analytic in 3436) [ClassicSimilarity], result of:
           0.31683075 = score(doc=3436,freq=2.0), product of:
             0.40853214 = queryWeight, product of:
               2.8200068 = boost
               7.019336 = idf(docFreq=107, maxDocs=44421)
               0.020638589 = queryNorm
             0.77553445 = fieldWeight in 3436, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.019336 = idf(docFreq=107, maxDocs=44421)
               0.078125 = fieldNorm(doc=3436)
         0.25547132 = weight(abstract_txt:performance in 3436) [ClassicSimilarity], result of:
           0.25547132 = score(doc=3436,freq=4.0), product of:
             0.3539181 = queryWeight, product of:
               3.7119613 = boost
               4.619759 = idf(docFreq=1189, maxDocs=44421)
               0.020638589 = queryNorm
             0.72183734 = fieldWeight in 3436, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.619759 = idf(docFreq=1189, maxDocs=44421)
               0.078125 = fieldNorm(doc=3436)
       0.44 = coord(11/25)
   

2. Losee, R.M.: Comparing Boolean and probabilistic information retrieval systems across queries and disciplines (1997) 0.51

   0.50637305 = sum of:
     0.50637305 = product of:
       1.2659326 = sum of:
         0.10789109 = weight(abstract_txt:dependence in 778) [ClassicSimilarity], result of:
           0.10789109 = score(doc=778,freq=1.0), product of:
             0.1541158 = queryWeight, product of:
               7.467361 = idf(docFreq=68, maxDocs=44421)
               0.020638589 = queryNorm
             0.7000651 = fieldWeight in 778, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.467361 = idf(docFreq=68, maxDocs=44421)
               0.09375 = fieldNorm(doc=778)
         0.030800251 = weight(abstract_txt:well in 778) [ClassicSimilarity], result of:
           0.030800251 = score(doc=778,freq=1.0), product of:
             0.0841853 = queryWeight, product of:
               1.0452244 = boost
               3.9025342 = idf(docFreq=2437, maxDocs=44421)
               0.020638589 = queryNorm
             0.36586258 = fieldWeight in 778, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9025342 = idf(docFreq=2437, maxDocs=44421)
               0.09375 = fieldNorm(doc=778)
         0.12971479 = weight(abstract_txt:independence in 778) [ClassicSimilarity], result of:
           0.12971479 = score(doc=778,freq=1.0), product of:
             0.17425413 = queryWeight, product of:
               1.0633298 = boost
               7.9402676 = idf(docFreq=42, maxDocs=44421)
               0.020638589 = queryNorm
             0.7444001 = fieldWeight in 778, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.9402676 = idf(docFreq=42, maxDocs=44421)
               0.09375 = fieldNorm(doc=778)
         0.036329206 = weight(abstract_txt:documents in 778) [ClassicSimilarity], result of:
           0.036329206 = score(doc=778,freq=1.0), product of:
             0.09398042 = queryWeight, product of:
               1.1043586 = boost
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.020638589 = queryNorm
             0.38656145 = fieldWeight in 778, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.09375 = fieldNorm(doc=778)
         0.040672246 = weight(abstract_txt:database in 778) [ClassicSimilarity], result of:
           0.040672246 = score(doc=778,freq=1.0), product of:
             0.10132864 = queryWeight, product of:
               1.1467204 = boost
               4.2814875 = idf(docFreq=1668, maxDocs=44421)
               0.020638589 = queryNorm
             0.40138945 = fieldWeight in 778, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.2814875 = idf(docFreq=1668, maxDocs=44421)
               0.09375 = fieldNorm(doc=778)
         0.08354447 = weight(abstract_txt:query in 778) [ClassicSimilarity], result of:
           0.08354447 = score(doc=778,freq=1.0), product of:
             0.1874314 = queryWeight, product of:
               1.9101093 = boost
               4.754492 = idf(docFreq=1039, maxDocs=44421)
               0.020638589 = queryNorm
             0.4457336 = fieldWeight in 778, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.754492 = idf(docFreq=1039, maxDocs=44421)
               0.09375 = fieldNorm(doc=778)
         0.14840682 = weight(abstract_txt:term in 778) [ClassicSimilarity], result of:
           0.14840682 = score(doc=778,freq=3.0), product of:
             0.190616 = queryWeight, product of:
               1.9262681 = boost
               4.794713 = idf(docFreq=998, maxDocs=44421)
               0.020638589 = queryNorm
             0.77856433 = fieldWeight in 778, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.794713 = idf(docFreq=998, maxDocs=44421)
               0.09375 = fieldNorm(doc=778)
         0.076983176 = weight(abstract_txt:retrieval in 778) [ClassicSimilarity], result of:
           0.076983176 = score(doc=778,freq=2.0), product of:
             0.16701956 = queryWeight, product of:
               2.327797 = boost
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.020638589 = queryNorm
             0.46092314 = fieldWeight in 778, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.09375 = fieldNorm(doc=778)
         0.26883978 = weight(abstract_txt:analytic in 778) [ClassicSimilarity], result of:
           0.26883978 = score(doc=778,freq=1.0), product of:
             0.40853214 = queryWeight, product of:
               2.8200068 = boost
               7.019336 = idf(docFreq=107, maxDocs=44421)
               0.020638589 = queryNorm
             0.65806276 = fieldWeight in 778, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.019336 = idf(docFreq=107, maxDocs=44421)
               0.09375 = fieldNorm(doc=778)
         0.34275073 = weight(abstract_txt:performance in 778) [ClassicSimilarity], result of:
           0.34275073 = score(doc=778,freq=5.0), product of:
             0.3539181 = queryWeight, product of:
               3.7119613 = boost
               4.619759 = idf(docFreq=1189, maxDocs=44421)
               0.020638589 = queryNorm
             0.96844643 = fieldWeight in 778, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               4.619759 = idf(docFreq=1189, maxDocs=44421)
               0.09375 = fieldNorm(doc=778)
       0.4 = coord(10/25)
   

3. Bollmann-Sdorra, P.; Raghavan, V.V.: On the necessity of term dependence in a query space for weighted retrieval (1998) 0.22

   0.22190006 = sum of:
     0.22190006 = product of:
       0.6934377 = sum of:
         0.020742765 = weight(abstract_txt:about in 3158) [ClassicSimilarity], result of:
           0.020742765 = score(doc=3158,freq=1.0), product of:
             0.08475631 = queryWeight, product of:
               1.0487632 = boost
               3.9157467 = idf(docFreq=2405, maxDocs=44421)
               0.020638589 = queryNorm
             0.24473417 = fieldWeight in 3158, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9157467 = idf(docFreq=2405, maxDocs=44421)
               0.0625 = fieldNorm(doc=3158)
         0.21182337 = weight(abstract_txt:independence in 3158) [ClassicSimilarity], result of:
           0.21182337 = score(doc=3158,freq=6.0), product of:
             0.17425413 = queryWeight, product of:
               1.0633298 = boost
               7.9402676 = idf(docFreq=42, maxDocs=44421)
               0.020638589 = queryNorm
             1.2156003 = fieldWeight in 3158, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               7.9402676 = idf(docFreq=42, maxDocs=44421)
               0.0625 = fieldNorm(doc=3158)
         0.02182642 = weight(abstract_txt:model in 3158) [ClassicSimilarity], result of:
           0.02182642 = score(doc=3158,freq=1.0), product of:
             0.08768311 = queryWeight, product of:
               1.0667175 = boost
               3.9827821 = idf(docFreq=2249, maxDocs=44421)
               0.020638589 = queryNorm
             0.24892388 = fieldWeight in 3158, 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=3158)
         0.02421947 = weight(abstract_txt:documents in 3158) [ClassicSimilarity], result of:
           0.02421947 = score(doc=3158,freq=1.0), product of:
             0.09398042 = queryWeight, product of:
               1.1043586 = boost
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.020638589 = queryNorm
             0.25770763 = fieldWeight in 3158, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.0625 = fieldNorm(doc=3158)
         0.13642755 = weight(abstract_txt:query in 3158) [ClassicSimilarity], result of:
           0.13642755 = score(doc=3158,freq=6.0), product of:
             0.1874314 = queryWeight, product of:
               1.9101093 = boost
               4.754492 = idf(docFreq=1039, maxDocs=44421)
               0.020638589 = queryNorm
             0.72787994 = fieldWeight in 3158, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               4.754492 = idf(docFreq=1039, maxDocs=44421)
               0.0625 = fieldNorm(doc=3158)
         0.13991931 = weight(abstract_txt:term in 3158) [ClassicSimilarity], result of:
           0.13991931 = score(doc=3158,freq=6.0), product of:
             0.190616 = queryWeight, product of:
               1.9262681 = boost
               4.794713 = idf(docFreq=998, maxDocs=44421)
               0.020638589 = queryNorm
             0.7340376 = fieldWeight in 3158, 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=3158)
         0.03629022 = weight(abstract_txt:retrieval in 3158) [ClassicSimilarity], result of:
           0.03629022 = score(doc=3158,freq=1.0), product of:
             0.16701956 = queryWeight, product of:
               2.327797 = boost
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.020638589 = queryNorm
             0.21728125 = fieldWeight in 3158, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.0625 = fieldNorm(doc=3158)
         0.10218853 = weight(abstract_txt:performance in 3158) [ClassicSimilarity], result of:
           0.10218853 = score(doc=3158,freq=1.0), product of:
             0.3539181 = queryWeight, product of:
               3.7119613 = boost
               4.619759 = idf(docFreq=1189, maxDocs=44421)
               0.020638589 = queryNorm
             0.28873494 = fieldWeight in 3158, 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=3158)
       0.32 = coord(8/25)
   

4. Losee, R.M.: ¬The effect of assigning a metadata or indexing term on document ordering (2013) 0.19

   0.18909505 = sum of:
     0.18909505 = product of:
       0.78789604 = sum of:
         0.047255587 = weight(abstract_txt:model in 2100) [ClassicSimilarity], result of:
           0.047255587 = score(doc=2100,freq=3.0), product of:
             0.08768311 = queryWeight, product of:
               1.0667175 = boost
               3.9827821 = idf(docFreq=2249, maxDocs=44421)
               0.020638589 = queryNorm
             0.538936 = fieldWeight in 2100, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.9827821 = idf(docFreq=2249, maxDocs=44421)
               0.078125 = fieldNorm(doc=2100)
         0.042814378 = weight(abstract_txt:documents in 2100) [ClassicSimilarity], result of:
           0.042814378 = score(doc=2100,freq=2.0), product of:
             0.09398042 = queryWeight, product of:
               1.1043586 = boost
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.020638589 = queryNorm
             0.455567 = fieldWeight in 2100, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.078125 = fieldNorm(doc=2100)
         0.14280452 = weight(abstract_txt:term in 2100) [ClassicSimilarity], result of:
           0.14280452 = score(doc=2100,freq=4.0), product of:
             0.190616 = queryWeight, product of:
               1.9262681 = boost
               4.794713 = idf(docFreq=998, maxDocs=44421)
               0.020638589 = queryNorm
             0.7491739 = fieldWeight in 2100, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.794713 = idf(docFreq=998, maxDocs=44421)
               0.078125 = fieldNorm(doc=2100)
         0.045362774 = weight(abstract_txt:retrieval in 2100) [ClassicSimilarity], result of:
           0.045362774 = score(doc=2100,freq=1.0), product of:
             0.16701956 = queryWeight, product of:
               2.327797 = boost
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.020638589 = queryNorm
             0.27160156 = fieldWeight in 2100, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.078125 = fieldNorm(doc=2100)
         0.22403315 = weight(abstract_txt:analytic in 2100) [ClassicSimilarity], result of:
           0.22403315 = score(doc=2100,freq=1.0), product of:
             0.40853214 = queryWeight, product of:
               2.8200068 = boost
               7.019336 = idf(docFreq=107, maxDocs=44421)
               0.020638589 = queryNorm
             0.5483856 = fieldWeight in 2100, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.019336 = idf(docFreq=107, maxDocs=44421)
               0.078125 = fieldNorm(doc=2100)
         0.2856256 = weight(abstract_txt:performance in 2100) [ClassicSimilarity], result of:
           0.2856256 = score(doc=2100,freq=5.0), product of:
             0.3539181 = queryWeight, product of:
               3.7119613 = boost
               4.619759 = idf(docFreq=1189, maxDocs=44421)
               0.020638589 = queryNorm
             0.80703866 = fieldWeight in 2100, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               4.619759 = idf(docFreq=1189, maxDocs=44421)
               0.078125 = fieldNorm(doc=2100)
       0.24 = coord(6/25)
   

5. 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) 0.19

   0.18827154 = sum of:
     0.18827154 = product of:
       0.58834857 = sum of:
         0.020533502 = weight(abstract_txt:well in 678) [ClassicSimilarity], result of:
           0.020533502 = score(doc=678,freq=1.0), product of:
             0.0841853 = queryWeight, product of:
               1.0452244 = boost
               3.9025342 = idf(docFreq=2437, maxDocs=44421)
               0.020638589 = queryNorm
             0.24390839 = fieldWeight in 678, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9025342 = idf(docFreq=2437, maxDocs=44421)
               0.0625 = fieldNorm(doc=678)
         0.030867219 = weight(abstract_txt:model in 678) [ClassicSimilarity], result of:
           0.030867219 = score(doc=678,freq=2.0), product of:
             0.08768311 = queryWeight, product of:
               1.0667175 = boost
               3.9827821 = idf(docFreq=2249, maxDocs=44421)
               0.020638589 = 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)
         0.034251504 = weight(abstract_txt:documents in 678) [ClassicSimilarity], result of:
           0.034251504 = score(doc=678,freq=2.0), product of:
             0.09398042 = queryWeight, product of:
               1.1043586 = boost
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.020638589 = queryNorm
             0.3644536 = fieldWeight in 678, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.0625 = fieldNorm(doc=678)
         0.03428752 = weight(abstract_txt:relevant in 678) [ClassicSimilarity], result of:
           0.03428752 = score(doc=678,freq=1.0), product of:
             0.1184909 = queryWeight, product of:
               1.2400349 = boost
               4.6298943 = idf(docFreq=1177, maxDocs=44421)
               0.020638589 = queryNorm
             0.2893684 = fieldWeight in 678, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.6298943 = idf(docFreq=1177, maxDocs=44421)
               0.0625 = fieldNorm(doc=678)
         0.11139263 = weight(abstract_txt:query in 678) [ClassicSimilarity], result of:
           0.11139263 = score(doc=678,freq=4.0), product of:
             0.1874314 = queryWeight, product of:
               1.9101093 = boost
               4.754492 = idf(docFreq=1039, maxDocs=44421)
               0.020638589 = 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)
         0.13991931 = weight(abstract_txt:term in 678) [ClassicSimilarity], result of:
           0.13991931 = score(doc=678,freq=6.0), product of:
             0.190616 = queryWeight, product of:
               1.9262681 = boost
               4.794713 = idf(docFreq=998, maxDocs=44421)
               0.020638589 = 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)
         0.07258044 = weight(abstract_txt:retrieval in 678) [ClassicSimilarity], result of:
           0.07258044 = score(doc=678,freq=4.0), product of:
             0.16701956 = queryWeight, product of:
               2.327797 = boost
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.020638589 = queryNorm
             0.4345625 = fieldWeight in 678, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.0625 = fieldNorm(doc=678)
         0.1445164 = weight(abstract_txt:performance in 678) [ClassicSimilarity], result of:
           0.1445164 = score(doc=678,freq=2.0), product of:
             0.3539181 = queryWeight, product of:
               3.7119613 = boost
               4.619759 = idf(docFreq=1189, maxDocs=44421)
               0.020638589 = queryNorm
             0.40833285 = fieldWeight in 678, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.619759 = idf(docFreq=1189, maxDocs=44421)
               0.0625 = fieldNorm(doc=678)
       0.32 = coord(8/25)