Document (#39686)

Author
Colace, F.
Santo, M. De
Greco, L.
Napoletano, P.
Title
Weighted word pairs for query expansion
Source
Information processing and management. 51(2015) no.1, S.179-193
Year
2015
Abstract
This paper proposes a novel query expansion method to improve accuracy of text retrieval systems. Our method makes use of a minimal relevance feedback to expand the initial query with a structured representation composed of weighted pairs of words. Such a structure is obtained from the relevance feedback through a method for pairs of words selection based on the Probabilistic Topic Model. We compared our method with other baseline query expansion schemes and methods. Evaluations performed on TREC-8 demonstrated the effectiveness of the proposed method with respect to the baseline.
Content
Vgl.: doi: 10.1016/j.ipm.2014.07.004.
Theme
Computerlinguistik
Semantisches Umfeld in Indexierung u. Retrieval

Similar documents (content)

  1. Colace, F.; Santo, M. de; Greco, L.; Napoletano, P.: Improving relevance feedback-based query expansion by the use of a weighted word pairs approach (2015) 0.85
    0.84662247 = sum of:
      0.84662247 = product of:
        1.6281202 = sum of:
          0.04820921 = weight(abstract_txt:initial in 4261) [ClassicSimilarity], result of:
            0.04820921 = score(doc=4261,freq=1.0), product of:
              0.10574797 = queryWeight, product of:
                1.053768 = boost
                5.835364 = idf(docFreq=345, maxDocs=43556)
                0.017197253 = queryNorm
              0.4558878 = fieldWeight in 4261, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.835364 = idf(docFreq=345, maxDocs=43556)
                0.078125 = fieldNorm(doc=4261)
          0.053085096 = weight(abstract_txt:demonstrated in 4261) [ClassicSimilarity], result of:
            0.053085096 = score(doc=4261,freq=1.0), product of:
              0.11276312 = queryWeight, product of:
                1.0881594 = boost
                6.0258107 = idf(docFreq=285, maxDocs=43556)
                0.017197253 = queryNorm
              0.47076645 = fieldWeight in 4261, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.0258107 = idf(docFreq=285, maxDocs=43556)
                0.078125 = fieldNorm(doc=4261)
          0.07268944 = weight(abstract_txt:trec in 4261) [ClassicSimilarity], result of:
            0.07268944 = score(doc=4261,freq=1.0), product of:
              0.13904849 = queryWeight, product of:
                1.2083483 = boost
                6.69137 = idf(docFreq=146, maxDocs=43556)
                0.017197253 = queryNorm
              0.52276325 = fieldWeight in 4261, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.69137 = idf(docFreq=146, maxDocs=43556)
                0.078125 = fieldNorm(doc=4261)
          0.07291211 = weight(abstract_txt:evaluations in 4261) [ClassicSimilarity], result of:
            0.07291211 = score(doc=4261,freq=1.0), product of:
              0.13933231 = queryWeight, product of:
                1.2095809 = boost
                6.698196 = idf(docFreq=145, maxDocs=43556)
                0.017197253 = queryNorm
              0.52329654 = fieldWeight in 4261, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.698196 = idf(docFreq=145, maxDocs=43556)
                0.078125 = fieldNorm(doc=4261)
          0.019903328 = weight(abstract_txt:with in 4261) [ClassicSimilarity], result of:
            0.019903328 = score(doc=4261,freq=3.0), product of:
              0.058632154 = queryWeight, product of:
                1.3590566 = boost
                2.508645 = idf(docFreq=9634, maxDocs=43556)
                0.017197253 = queryNorm
              0.33946097 = fieldWeight in 4261, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                2.508645 = idf(docFreq=9634, maxDocs=43556)
                0.078125 = fieldNorm(doc=4261)
          0.058292232 = weight(abstract_txt:relevance in 4261) [ClassicSimilarity], result of:
            0.058292232 = score(doc=4261,freq=1.0), product of:
              0.15121765 = queryWeight, product of:
                1.782072 = boost
                4.934216 = idf(docFreq=851, maxDocs=43556)
                0.017197253 = queryNorm
              0.38548562 = fieldWeight in 4261, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.934216 = idf(docFreq=851, maxDocs=43556)
                0.078125 = fieldNorm(doc=4261)
          0.14443922 = weight(abstract_txt:feedback in 4261) [ClassicSimilarity], result of:
            0.14443922 = score(doc=4261,freq=2.0), product of:
              0.21977358 = queryWeight, product of:
                2.1483831 = boost
                5.9484615 = idf(docFreq=308, maxDocs=43556)
                0.017197253 = queryNorm
              0.65721834 = fieldWeight in 4261, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.9484615 = idf(docFreq=308, maxDocs=43556)
                0.078125 = fieldNorm(doc=4261)
          0.16136889 = weight(abstract_txt:baseline in 4261) [ClassicSimilarity], result of:
            0.16136889 = score(doc=4261,freq=1.0), product of:
              0.29813197 = queryWeight, product of:
                2.5022361 = boost
                6.9282126 = idf(docFreq=115, maxDocs=43556)
                0.017197253 = queryNorm
              0.5412666 = fieldWeight in 4261, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.9282126 = idf(docFreq=115, maxDocs=43556)
                0.078125 = fieldNorm(doc=4261)
          0.23080912 = weight(abstract_txt:weighted in 4261) [ClassicSimilarity], result of:
            0.23080912 = score(doc=4261,freq=2.0), product of:
              0.3003913 = queryWeight, product of:
                2.5116994 = boost
                6.954415 = idf(docFreq=112, maxDocs=43556)
                0.017197253 = queryNorm
              0.76836157 = fieldWeight in 4261, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                6.954415 = idf(docFreq=112, maxDocs=43556)
                0.078125 = fieldNorm(doc=4261)
          0.16599545 = weight(abstract_txt:expansion in 4261) [ClassicSimilarity], result of:
            0.16599545 = score(doc=4261,freq=1.0), product of:
              0.34776822 = queryWeight, product of:
                3.3098974 = boost
                6.1096487 = idf(docFreq=262, maxDocs=43556)
                0.017197253 = queryNorm
              0.47731632 = fieldWeight in 4261, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.1096487 = idf(docFreq=262, maxDocs=43556)
                0.078125 = fieldNorm(doc=4261)
          0.1463985 = weight(abstract_txt:query in 4261) [ClassicSimilarity], result of:
            0.1463985 = score(doc=4261,freq=2.0), product of:
              0.27939573 = queryWeight, product of:
                3.4256964 = boost
                4.742549 = idf(docFreq=1031, maxDocs=43556)
                0.017197253 = queryNorm
              0.5239826 = fieldWeight in 4261, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.742549 = idf(docFreq=1031, maxDocs=43556)
                0.078125 = fieldNorm(doc=4261)
          0.23108977 = weight(abstract_txt:pairs in 4261) [ClassicSimilarity], result of:
            0.23108977 = score(doc=4261,freq=1.0), product of:
              0.43359035 = queryWeight, product of:
                3.6958082 = boost
                6.8219905 = idf(docFreq=128, maxDocs=43556)
                0.017197253 = queryNorm
              0.532968 = fieldWeight in 4261, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.8219905 = idf(docFreq=128, maxDocs=43556)
                0.078125 = fieldNorm(doc=4261)
          0.22292776 = weight(abstract_txt:method in 4261) [ClassicSimilarity], result of:
            0.22292776 = score(doc=4261,freq=4.0), product of:
              0.31617787 = queryWeight, product of:
                4.074363 = boost
                4.5124526 = idf(docFreq=1298, maxDocs=43556)
                0.017197253 = queryNorm
              0.70507073 = fieldWeight in 4261, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                4.5124526 = idf(docFreq=1298, maxDocs=43556)
                0.078125 = fieldNorm(doc=4261)
        0.52 = coord(13/25)
    
  2. Dang, E.K.F.; Luk, R.W.P.; Allan, J.: ¬A context-dependent relevance model (2016) 0.39
    0.38651368 = sum of:
      0.38651368 = product of:
        0.96628416 = sum of:
          0.04246808 = weight(abstract_txt:demonstrated in 4776) [ClassicSimilarity], result of:
            0.04246808 = score(doc=4776,freq=1.0), product of:
              0.11276312 = queryWeight, product of:
                1.0881594 = boost
                6.0258107 = idf(docFreq=285, maxDocs=43556)
                0.017197253 = queryNorm
              0.37661317 = fieldWeight in 4776, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.0258107 = idf(docFreq=285, maxDocs=43556)
                0.0625 = fieldNorm(doc=4776)
          0.058151554 = weight(abstract_txt:trec in 4776) [ClassicSimilarity], result of:
            0.058151554 = score(doc=4776,freq=1.0), product of:
              0.13904849 = queryWeight, product of:
                1.2083483 = boost
                6.69137 = idf(docFreq=146, maxDocs=43556)
                0.017197253 = queryNorm
              0.41821063 = fieldWeight in 4776, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.69137 = idf(docFreq=146, maxDocs=43556)
                0.0625 = fieldNorm(doc=4776)
          0.009192954 = weight(abstract_txt:with in 4776) [ClassicSimilarity], result of:
            0.009192954 = score(doc=4776,freq=1.0), product of:
              0.058632154 = queryWeight, product of:
                1.3590566 = boost
                2.508645 = idf(docFreq=9634, maxDocs=43556)
                0.017197253 = queryNorm
              0.15679032 = fieldWeight in 4776, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.508645 = idf(docFreq=9634, maxDocs=43556)
                0.0625 = fieldNorm(doc=4776)
          0.104276314 = weight(abstract_txt:relevance in 4776) [ClassicSimilarity], result of:
            0.104276314 = score(doc=4776,freq=5.0), product of:
              0.15121765 = queryWeight, product of:
                1.782072 = boost
                4.934216 = idf(docFreq=851, maxDocs=43556)
                0.017197253 = queryNorm
              0.68957764 = fieldWeight in 4776, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                4.934216 = idf(docFreq=851, maxDocs=43556)
                0.0625 = fieldNorm(doc=4776)
          0.05957289 = weight(abstract_txt:words in 4776) [ClassicSimilarity], result of:
            0.05957289 = score(doc=4776,freq=1.0), product of:
              0.17803326 = queryWeight, product of:
                1.9336354 = boost
                5.353866 = idf(docFreq=559, maxDocs=43556)
                0.017197253 = queryNorm
              0.33461663 = fieldWeight in 4776, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.353866 = idf(docFreq=559, maxDocs=43556)
                0.0625 = fieldNorm(doc=4776)
          0.16341433 = weight(abstract_txt:feedback in 4776) [ClassicSimilarity], result of:
            0.16341433 = score(doc=4776,freq=4.0), product of:
              0.21977358 = queryWeight, product of:
                2.1483831 = boost
                5.9484615 = idf(docFreq=308, maxDocs=43556)
                0.017197253 = queryNorm
              0.7435577 = fieldWeight in 4776, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                5.9484615 = idf(docFreq=308, maxDocs=43556)
                0.0625 = fieldNorm(doc=4776)
          0.1290951 = weight(abstract_txt:baseline in 4776) [ClassicSimilarity], result of:
            0.1290951 = score(doc=4776,freq=1.0), product of:
              0.29813197 = queryWeight, product of:
                2.5022361 = boost
                6.9282126 = idf(docFreq=115, maxDocs=43556)
                0.017197253 = queryNorm
              0.4330133 = fieldWeight in 4776, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.9282126 = idf(docFreq=115, maxDocs=43556)
                0.0625 = fieldNorm(doc=4776)
          0.13056535 = weight(abstract_txt:weighted in 4776) [ClassicSimilarity], result of:
            0.13056535 = score(doc=4776,freq=1.0), product of:
              0.3003913 = queryWeight, product of:
                2.5116994 = boost
                6.954415 = idf(docFreq=112, maxDocs=43556)
                0.017197253 = queryNorm
              0.43465093 = fieldWeight in 4776, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.954415 = idf(docFreq=112, maxDocs=43556)
                0.0625 = fieldNorm(doc=4776)
          0.14344063 = weight(abstract_txt:query in 4776) [ClassicSimilarity], result of:
            0.14344063 = score(doc=4776,freq=3.0), product of:
              0.27939573 = queryWeight, product of:
                3.4256964 = boost
                4.742549 = idf(docFreq=1031, maxDocs=43556)
                0.017197253 = queryNorm
              0.51339597 = fieldWeight in 4776, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.742549 = idf(docFreq=1031, maxDocs=43556)
                0.0625 = fieldNorm(doc=4776)
          0.12610699 = weight(abstract_txt:method in 4776) [ClassicSimilarity], result of:
            0.12610699 = score(doc=4776,freq=2.0), product of:
              0.31617787 = queryWeight, product of:
                4.074363 = boost
                4.5124526 = idf(docFreq=1298, maxDocs=43556)
                0.017197253 = queryNorm
              0.39884824 = fieldWeight in 4776, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.5124526 = idf(docFreq=1298, maxDocs=43556)
                0.0625 = fieldNorm(doc=4776)
        0.4 = coord(10/25)
    
  3. Efthimiadis, E.N.: Interactive query expansion : a user-based evaluation in a relevance feedback environment (2000) 0.35
    0.3493361 = sum of:
      0.3493361 = product of:
        1.0916753 = sum of:
          0.058450557 = weight(abstract_txt:initial in 699) [ClassicSimilarity], result of:
            0.058450557 = score(doc=699,freq=3.0), product of:
              0.10574797 = queryWeight, product of:
                1.053768 = boost
                5.835364 = idf(docFreq=345, maxDocs=43556)
                0.017197253 = queryNorm
              0.55273455 = fieldWeight in 699, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                5.835364 = idf(docFreq=345, maxDocs=43556)
                0.0546875 = fieldNorm(doc=699)
          0.05103848 = weight(abstract_txt:evaluations in 699) [ClassicSimilarity], result of:
            0.05103848 = score(doc=699,freq=1.0), product of:
              0.13933231 = queryWeight, product of:
                1.2095809 = boost
                6.698196 = idf(docFreq=145, maxDocs=43556)
                0.017197253 = queryNorm
              0.3663076 = fieldWeight in 699, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.698196 = idf(docFreq=145, maxDocs=43556)
                0.0546875 = fieldNorm(doc=699)
          0.008043835 = weight(abstract_txt:with in 699) [ClassicSimilarity], result of:
            0.008043835 = score(doc=699,freq=1.0), product of:
              0.058632154 = queryWeight, product of:
                1.3590566 = boost
                2.508645 = idf(docFreq=9634, maxDocs=43556)
                0.017197253 = queryNorm
              0.13719153 = fieldWeight in 699, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.508645 = idf(docFreq=9634, maxDocs=43556)
                0.0546875 = fieldNorm(doc=699)
          0.070675574 = weight(abstract_txt:relevance in 699) [ClassicSimilarity], result of:
            0.070675574 = score(doc=699,freq=3.0), product of:
              0.15121765 = queryWeight, product of:
                1.782072 = boost
                4.934216 = idf(docFreq=851, maxDocs=43556)
                0.017197253 = queryNorm
              0.46737647 = fieldWeight in 699, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.934216 = idf(docFreq=851, maxDocs=43556)
                0.0546875 = fieldNorm(doc=699)
          0.07149377 = weight(abstract_txt:feedback in 699) [ClassicSimilarity], result of:
            0.07149377 = score(doc=699,freq=1.0), product of:
              0.21977358 = queryWeight, product of:
                2.1483831 = boost
                5.9484615 = idf(docFreq=308, maxDocs=43556)
                0.017197253 = queryNorm
              0.32530648 = fieldWeight in 699, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.9484615 = idf(docFreq=308, maxDocs=43556)
                0.0546875 = fieldNorm(doc=699)
          0.114244685 = weight(abstract_txt:weighted in 699) [ClassicSimilarity], result of:
            0.114244685 = score(doc=699,freq=1.0), product of:
              0.3003913 = queryWeight, product of:
                2.5116994 = boost
                6.954415 = idf(docFreq=112, maxDocs=43556)
                0.017197253 = queryNorm
              0.38031957 = fieldWeight in 699, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.954415 = idf(docFreq=112, maxDocs=43556)
                0.0546875 = fieldNorm(doc=699)
          0.41895354 = weight(abstract_txt:expansion in 699) [ClassicSimilarity], result of:
            0.41895354 = score(doc=699,freq=13.0), product of:
              0.34776822 = queryWeight, product of:
                3.3098974 = boost
                6.1096487 = idf(docFreq=262, maxDocs=43556)
                0.017197253 = queryNorm
              1.2046919 = fieldWeight in 699, product of:
                3.6055512 = tf(freq=13.0), with freq of:
                  13.0 = termFreq=13.0
                6.1096487 = idf(docFreq=262, maxDocs=43556)
                0.0546875 = fieldNorm(doc=699)
          0.2987749 = weight(abstract_txt:query in 699) [ClassicSimilarity], result of:
            0.2987749 = score(doc=699,freq=17.0), product of:
              0.27939573 = queryWeight, product of:
                3.4256964 = boost
                4.742549 = idf(docFreq=1031, maxDocs=43556)
                0.017197253 = queryNorm
              1.069361 = fieldWeight in 699, product of:
                4.1231055 = tf(freq=17.0), with freq of:
                  17.0 = termFreq=17.0
                4.742549 = idf(docFreq=1031, maxDocs=43556)
                0.0546875 = fieldNorm(doc=699)
        0.32 = coord(8/25)
    
  4. Vechtomova, O.; Karamuftuoglu, M.: Lexical cohesion and term proximity in document ranking (2008) 0.35
    0.34560263 = sum of:
      0.34560263 = product of:
        1.0800083 = sum of:
          0.08722733 = weight(abstract_txt:trec in 4099) [ClassicSimilarity], result of:
            0.08722733 = score(doc=4099,freq=1.0), product of:
              0.13904849 = queryWeight, product of:
                1.2083483 = boost
                6.69137 = idf(docFreq=146, maxDocs=43556)
                0.017197253 = queryNorm
              0.62731594 = fieldWeight in 4099, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.69137 = idf(docFreq=146, maxDocs=43556)
                0.09375 = fieldNorm(doc=4099)
          0.013789431 = weight(abstract_txt:with in 4099) [ClassicSimilarity], result of:
            0.013789431 = score(doc=4099,freq=1.0), product of:
              0.058632154 = queryWeight, product of:
                1.3590566 = boost
                2.508645 = idf(docFreq=9634, maxDocs=43556)
                0.017197253 = queryNorm
              0.23518547 = fieldWeight in 4099, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                2.508645 = idf(docFreq=9634, maxDocs=43556)
                0.09375 = fieldNorm(doc=4099)
          0.06995068 = weight(abstract_txt:relevance in 4099) [ClassicSimilarity], result of:
            0.06995068 = score(doc=4099,freq=1.0), product of:
              0.15121765 = queryWeight, product of:
                1.782072 = boost
                4.934216 = idf(docFreq=851, maxDocs=43556)
                0.017197253 = queryNorm
              0.46258277 = fieldWeight in 4099, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.934216 = idf(docFreq=851, maxDocs=43556)
                0.09375 = fieldNorm(doc=4099)
          0.089359336 = weight(abstract_txt:words in 4099) [ClassicSimilarity], result of:
            0.089359336 = score(doc=4099,freq=1.0), product of:
              0.17803326 = queryWeight, product of:
                1.9336354 = boost
                5.353866 = idf(docFreq=559, maxDocs=43556)
                0.017197253 = queryNorm
              0.50192493 = fieldWeight in 4099, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.353866 = idf(docFreq=559, maxDocs=43556)
                0.09375 = fieldNorm(doc=4099)
          0.12256075 = weight(abstract_txt:feedback in 4099) [ClassicSimilarity], result of:
            0.12256075 = score(doc=4099,freq=1.0), product of:
              0.21977358 = queryWeight, product of:
                2.1483831 = boost
                5.9484615 = idf(docFreq=308, maxDocs=43556)
                0.017197253 = queryNorm
              0.55766827 = fieldWeight in 4099, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.9484615 = idf(docFreq=308, maxDocs=43556)
                0.09375 = fieldNorm(doc=4099)
          0.19364266 = weight(abstract_txt:baseline in 4099) [ClassicSimilarity], result of:
            0.19364266 = score(doc=4099,freq=1.0), product of:
              0.29813197 = queryWeight, product of:
                2.5022361 = boost
                6.9282126 = idf(docFreq=115, maxDocs=43556)
                0.017197253 = queryNorm
              0.6495199 = fieldWeight in 4099, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.9282126 = idf(docFreq=115, maxDocs=43556)
                0.09375 = fieldNorm(doc=4099)
          0.19919452 = weight(abstract_txt:expansion in 4099) [ClassicSimilarity], result of:
            0.19919452 = score(doc=4099,freq=1.0), product of:
              0.34776822 = queryWeight, product of:
                3.3098974 = boost
                6.1096487 = idf(docFreq=262, maxDocs=43556)
                0.017197253 = queryNorm
              0.57277954 = fieldWeight in 4099, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.1096487 = idf(docFreq=262, maxDocs=43556)
                0.09375 = fieldNorm(doc=4099)
          0.30428356 = weight(abstract_txt:query in 4099) [ClassicSimilarity], result of:
            0.30428356 = score(doc=4099,freq=6.0), product of:
              0.27939573 = queryWeight, product of:
                3.4256964 = boost
                4.742549 = idf(docFreq=1031, maxDocs=43556)
                0.017197253 = queryNorm
              1.0890774 = fieldWeight in 4099, product of:
                2.4494898 = tf(freq=6.0), with freq of:
                  6.0 = termFreq=6.0
                4.742549 = idf(docFreq=1031, maxDocs=43556)
                0.09375 = fieldNorm(doc=4099)
        0.32 = coord(8/25)
    
  5. Vechtomova, O.; Karamuftuoglu, M.: Elicitation and use of relevance feedback information (2006) 0.33
    0.3304416 = sum of:
      0.3304416 = product of:
        1.03263 = sum of:
          0.057851054 = weight(abstract_txt:initial in 2964) [ClassicSimilarity], result of:
            0.057851054 = score(doc=2964,freq=1.0), product of:
              0.10574797 = queryWeight, product of:
                1.053768 = boost
                5.835364 = idf(docFreq=345, maxDocs=43556)
                0.017197253 = queryNorm
              0.5470654 = fieldWeight in 2964, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.835364 = idf(docFreq=345, maxDocs=43556)
                0.09375 = fieldNorm(doc=2964)
          0.06251268 = weight(abstract_txt:accuracy in 2964) [ClassicSimilarity], result of:
            0.06251268 = score(doc=2964,freq=1.0), product of:
              0.11135506 = queryWeight, product of:
                1.0813442 = boost
                5.9880705 = idf(docFreq=296, maxDocs=43556)
                0.017197253 = queryNorm
              0.5613816 = fieldWeight in 2964, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.9880705 = idf(docFreq=296, maxDocs=43556)
                0.09375 = fieldNorm(doc=2964)
          0.12335807 = weight(abstract_txt:trec in 2964) [ClassicSimilarity], result of:
            0.12335807 = score(doc=2964,freq=2.0), product of:
              0.13904849 = queryWeight, product of:
                1.2083483 = boost
                6.69137 = idf(docFreq=146, maxDocs=43556)
                0.017197253 = queryNorm
              0.8871587 = fieldWeight in 2964, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                6.69137 = idf(docFreq=146, maxDocs=43556)
                0.09375 = fieldNorm(doc=2964)
          0.102314316 = weight(abstract_txt:expand in 2964) [ClassicSimilarity], result of:
            0.102314316 = score(doc=2964,freq=1.0), product of:
              0.15465197 = queryWeight, product of:
                1.2743441 = boost
                7.05683 = idf(docFreq=101, maxDocs=43556)
                0.017197253 = queryNorm
              0.6615778 = fieldWeight in 2964, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.05683 = idf(docFreq=101, maxDocs=43556)
                0.09375 = fieldNorm(doc=2964)
          0.12256075 = weight(abstract_txt:feedback in 2964) [ClassicSimilarity], result of:
            0.12256075 = score(doc=2964,freq=1.0), product of:
              0.21977358 = queryWeight, product of:
                2.1483831 = boost
                5.9484615 = idf(docFreq=308, maxDocs=43556)
                0.017197253 = queryNorm
              0.55766827 = fieldWeight in 2964, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.9484615 = idf(docFreq=308, maxDocs=43556)
                0.09375 = fieldNorm(doc=2964)
          0.19919452 = weight(abstract_txt:expansion in 2964) [ClassicSimilarity], result of:
            0.19919452 = score(doc=2964,freq=1.0), product of:
              0.34776822 = queryWeight, product of:
                3.3098974 = boost
                6.1096487 = idf(docFreq=262, maxDocs=43556)
                0.017197253 = queryNorm
              0.57277954 = fieldWeight in 2964, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.1096487 = idf(docFreq=262, maxDocs=43556)
                0.09375 = fieldNorm(doc=2964)
          0.17567818 = weight(abstract_txt:query in 2964) [ClassicSimilarity], result of:
            0.17567818 = score(doc=2964,freq=2.0), product of:
              0.27939573 = queryWeight, product of:
                3.4256964 = boost
                4.742549 = idf(docFreq=1031, maxDocs=43556)
                0.017197253 = queryNorm
              0.62877905 = fieldWeight in 2964, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.742549 = idf(docFreq=1031, maxDocs=43556)
                0.09375 = fieldNorm(doc=2964)
          0.18916047 = weight(abstract_txt:method in 2964) [ClassicSimilarity], result of:
            0.18916047 = score(doc=2964,freq=2.0), product of:
              0.31617787 = queryWeight, product of:
                4.074363 = boost
                4.5124526 = idf(docFreq=1298, maxDocs=43556)
                0.017197253 = queryNorm
              0.5982723 = fieldWeight in 2964, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.5124526 = idf(docFreq=1298, maxDocs=43556)
                0.09375 = fieldNorm(doc=2964)
        0.32 = coord(8/25)