Document (#2314)

Author
Koryconski, C.
Newell, A.F.
Title
Natural-language processing and automatic indexing
Source
Indexer. 17(1990), S.21-29
Year
1990
Abstract
The task of producing satisfactory indexes by automatic means has been tackled on two fronts: by statistical analysis of text and by attempting content analysis of the text in much the same way as a human indexer does. Though statistical techniques have a lot to offer for free-text database systems, neither method has had much success with back-of-the-book indexing. This review examines some problems associated with the application of natural-language processing techniques to book texts. - Vgl. auch die Erwiderung von K.P. Jones
Theme
Automatisches Indexieren

Similar documents (content)

  1. Smeaton, A.F.: Prospects for intelligent, language-based information retrieval (1991) 0.24
    0.24185269 = sum of:
      0.24185269 = product of:
        0.75578964 = sum of:
          0.052813385 = weight(abstract_txt:language in 3700) [ClassicSimilarity], result of:
            0.052813385 = score(doc=3700,freq=1.0), product of:
              0.1344443 = queryWeight, product of:
                1.4816847 = boost
                4.1901574 = idf(docFreq=1792, maxDocs=43556)
                0.021654904 = queryNorm
              0.39282727 = fieldWeight in 3700, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.1901574 = idf(docFreq=1792, maxDocs=43556)
                0.09375 = fieldNorm(doc=3700)
          0.10226237 = weight(abstract_txt:indexing in 3700) [ClassicSimilarity], result of:
            0.10226237 = score(doc=3700,freq=3.0), product of:
              0.144816 = queryWeight, product of:
                1.5377753 = boost
                4.3487797 = idf(docFreq=1529, maxDocs=43556)
                0.021654904 = queryNorm
              0.7061538 = fieldWeight in 3700, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.3487797 = idf(docFreq=1529, maxDocs=43556)
                0.09375 = fieldNorm(doc=3700)
          0.09424933 = weight(abstract_txt:techniques in 3700) [ClassicSimilarity], result of:
            0.09424933 = score(doc=3700,freq=2.0), product of:
              0.156996 = queryWeight, product of:
                1.6011385 = boost
                4.527969 = idf(docFreq=1278, maxDocs=43556)
                0.021654904 = queryNorm
              0.6003295 = fieldWeight in 3700, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.527969 = idf(docFreq=1278, maxDocs=43556)
                0.09375 = fieldNorm(doc=3700)
          0.08673536 = weight(abstract_txt:processing in 3700) [ClassicSimilarity], result of:
            0.08673536 = score(doc=3700,freq=1.0), product of:
              0.18714455 = queryWeight, product of:
                1.7481278 = boost
                4.9436502 = idf(docFreq=843, maxDocs=43556)
                0.021654904 = queryNorm
              0.4634672 = fieldWeight in 3700, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.9436502 = idf(docFreq=843, maxDocs=43556)
                0.09375 = fieldNorm(doc=3700)
          0.0954487 = weight(abstract_txt:natural in 3700) [ClassicSimilarity], result of:
            0.0954487 = score(doc=3700,freq=1.0), product of:
              0.1994771 = queryWeight, product of:
                1.8048085 = boost
                5.1039414 = idf(docFreq=718, maxDocs=43556)
                0.021654904 = queryNorm
              0.47849452 = fieldWeight in 3700, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.1039414 = idf(docFreq=718, maxDocs=43556)
                0.09375 = fieldNorm(doc=3700)
          0.10068636 = weight(abstract_txt:automatic in 3700) [ClassicSimilarity], result of:
            0.10068636 = score(doc=3700,freq=1.0), product of:
              0.20670936 = queryWeight, product of:
                1.8372349 = boost
                5.195642 = idf(docFreq=655, maxDocs=43556)
                0.021654904 = queryNorm
              0.48709142 = fieldWeight in 3700, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.195642 = idf(docFreq=655, maxDocs=43556)
                0.09375 = fieldNorm(doc=3700)
          0.122475296 = weight(abstract_txt:statistical in 3700) [ClassicSimilarity], result of:
            0.122475296 = score(doc=3700,freq=1.0), product of:
              0.23554762 = queryWeight, product of:
                1.9612093 = boost
                5.546238 = idf(docFreq=461, maxDocs=43556)
                0.021654904 = queryNorm
              0.5199598 = fieldWeight in 3700, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.546238 = idf(docFreq=461, maxDocs=43556)
                0.09375 = fieldNorm(doc=3700)
          0.10111879 = weight(abstract_txt:text in 3700) [ClassicSimilarity], result of:
            0.10111879 = score(doc=3700,freq=2.0), product of:
              0.18834527 = queryWeight, product of:
                2.147868 = boost
                4.0494018 = idf(docFreq=2063, maxDocs=43556)
                0.021654904 = queryNorm
              0.5368799 = fieldWeight in 3700, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.0494018 = idf(docFreq=2063, maxDocs=43556)
                0.09375 = fieldNorm(doc=3700)
        0.32 = coord(8/25)
    
  2. Dumais, S.T.: Latent semantic analysis (2003) 0.22
    0.22229877 = sum of:
      0.22229877 = product of:
        0.46312246 = sum of:
          0.04329576 = weight(abstract_txt:texts in 4460) [ClassicSimilarity], result of:
            0.04329576 = score(doc=4460,freq=4.0), product of:
              0.12247877 = queryWeight, product of:
                5.6559367 = idf(docFreq=413, maxDocs=43556)
                0.021654904 = queryNorm
              0.35349604 = fieldWeight in 4460, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                5.6559367 = idf(docFreq=413, maxDocs=43556)
                0.03125 = fieldNorm(doc=4460)
          0.04136274 = weight(abstract_txt:indexer in 4460) [ClassicSimilarity], result of:
            0.04136274 = score(doc=4460,freq=1.0), product of:
              0.18859208 = queryWeight, product of:
                1.2408844 = boost
                7.0183635 = idf(docFreq=105, maxDocs=43556)
                0.021654904 = queryNorm
              0.21932386 = fieldWeight in 4460, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.0183635 = idf(docFreq=105, maxDocs=43556)
                0.03125 = fieldNorm(doc=4460)
          0.023627238 = weight(abstract_txt:analysis in 4460) [ClassicSimilarity], result of:
            0.023627238 = score(doc=4460,freq=4.0), product of:
              0.103050284 = queryWeight, product of:
                1.2972068 = boost
                3.6684597 = idf(docFreq=3020, maxDocs=43556)
                0.021654904 = queryNorm
              0.22927873 = fieldWeight in 4460, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                3.6684597 = idf(docFreq=3020, maxDocs=43556)
                0.03125 = fieldNorm(doc=4460)
          0.017604461 = weight(abstract_txt:language in 4460) [ClassicSimilarity], result of:
            0.017604461 = score(doc=4460,freq=1.0), product of:
              0.1344443 = queryWeight, product of:
                1.4816847 = boost
                4.1901574 = idf(docFreq=1792, maxDocs=43556)
                0.021654904 = queryNorm
              0.13094242 = fieldWeight in 4460, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.1901574 = idf(docFreq=1792, maxDocs=43556)
                0.03125 = fieldNorm(doc=4460)
          0.02783229 = weight(abstract_txt:indexing in 4460) [ClassicSimilarity], result of:
            0.02783229 = score(doc=4460,freq=2.0), product of:
              0.144816 = queryWeight, product of:
                1.5377753 = boost
                4.3487797 = idf(docFreq=1529, maxDocs=43556)
                0.021654904 = queryNorm
              0.19219072 = fieldWeight in 4460, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.3487797 = idf(docFreq=1529, maxDocs=43556)
                0.03125 = fieldNorm(doc=4460)
          0.031416442 = weight(abstract_txt:techniques in 4460) [ClassicSimilarity], result of:
            0.031416442 = score(doc=4460,freq=2.0), product of:
              0.156996 = queryWeight, product of:
                1.6011385 = boost
                4.527969 = idf(docFreq=1278, maxDocs=43556)
                0.021654904 = queryNorm
              0.20010984 = fieldWeight in 4460, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.527969 = idf(docFreq=1278, maxDocs=43556)
                0.03125 = fieldNorm(doc=4460)
          0.040887438 = weight(abstract_txt:processing in 4460) [ClassicSimilarity], result of:
            0.040887438 = score(doc=4460,freq=2.0), product of:
              0.18714455 = queryWeight, product of:
                1.7481278 = boost
                4.9436502 = idf(docFreq=843, maxDocs=43556)
                0.021654904 = queryNorm
              0.21848053 = fieldWeight in 4460, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.9436502 = idf(docFreq=843, maxDocs=43556)
                0.03125 = fieldNorm(doc=4460)
          0.041699484 = weight(abstract_txt:much in 4460) [ClassicSimilarity], result of:
            0.041699484 = score(doc=4460,freq=2.0), product of:
              0.18961427 = queryWeight, product of:
                1.759625 = boost
                4.976164 = idf(docFreq=816, maxDocs=43556)
                0.021654904 = queryNorm
              0.21991745 = fieldWeight in 4460, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.976164 = idf(docFreq=816, maxDocs=43556)
                0.03125 = fieldNorm(doc=4460)
          0.031816233 = weight(abstract_txt:natural in 4460) [ClassicSimilarity], result of:
            0.031816233 = score(doc=4460,freq=1.0), product of:
              0.1994771 = queryWeight, product of:
                1.8048085 = boost
                5.1039414 = idf(docFreq=718, maxDocs=43556)
                0.021654904 = queryNorm
              0.15949817 = fieldWeight in 4460, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.1039414 = idf(docFreq=718, maxDocs=43556)
                0.03125 = fieldNorm(doc=4460)
          0.047464002 = weight(abstract_txt:automatic in 4460) [ClassicSimilarity], result of:
            0.047464002 = score(doc=4460,freq=2.0), product of:
              0.20670936 = queryWeight, product of:
                1.8372349 = boost
                5.195642 = idf(docFreq=655, maxDocs=43556)
                0.021654904 = queryNorm
              0.2296171 = fieldWeight in 4460, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.195642 = idf(docFreq=655, maxDocs=43556)
                0.03125 = fieldNorm(doc=4460)
          0.057735406 = weight(abstract_txt:statistical in 4460) [ClassicSimilarity], result of:
            0.057735406 = score(doc=4460,freq=2.0), product of:
              0.23554762 = queryWeight, product of:
                1.9612093 = boost
                5.546238 = idf(docFreq=461, maxDocs=43556)
                0.021654904 = queryNorm
              0.2451114 = fieldWeight in 4460, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.546238 = idf(docFreq=461, maxDocs=43556)
                0.03125 = fieldNorm(doc=4460)
          0.05838096 = weight(abstract_txt:text in 4460) [ClassicSimilarity], result of:
            0.05838096 = score(doc=4460,freq=6.0), product of:
              0.18834527 = queryWeight, product of:
                2.147868 = boost
                4.0494018 = idf(docFreq=2063, maxDocs=43556)
                0.021654904 = queryNorm
              0.30996776 = fieldWeight in 4460, product of:
                2.4494898 = tf(freq=6.0), with freq of:
                  6.0 = termFreq=6.0
                4.0494018 = idf(docFreq=2063, maxDocs=43556)
                0.03125 = fieldNorm(doc=4460)
        0.48 = coord(12/25)
    
  3. Jurafsky, D.; Martin, J.H.: Speech and language processing : ani ntroduction to natural language processing, computational linguistics and speech recognition (2009) 0.21
    0.20921399 = sum of:
      0.20921399 = product of:
        0.7471928 = sum of:
          0.12448234 = weight(abstract_txt:language in 3079) [ClassicSimilarity], result of:
            0.12448234 = score(doc=3079,freq=8.0), product of:
              0.1344443 = queryWeight, product of:
                1.4816847 = boost
                4.1901574 = idf(docFreq=1792, maxDocs=43556)
                0.021654904 = queryNorm
              0.9259027 = fieldWeight in 3079, product of:
                2.828427 = tf(freq=8.0), with freq of:
                  8.0 = termFreq=8.0
                4.1901574 = idf(docFreq=1792, maxDocs=43556)
                0.078125 = fieldNorm(doc=3079)
          0.055536952 = weight(abstract_txt:techniques in 3079) [ClassicSimilarity], result of:
            0.055536952 = score(doc=3079,freq=1.0), product of:
              0.156996 = queryWeight, product of:
                1.6011385 = boost
                4.527969 = idf(docFreq=1278, maxDocs=43556)
                0.021654904 = queryNorm
              0.35374758 = fieldWeight in 3079, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.527969 = idf(docFreq=1278, maxDocs=43556)
                0.078125 = fieldNorm(doc=3079)
          0.17704782 = weight(abstract_txt:processing in 3079) [ClassicSimilarity], result of:
            0.17704782 = score(doc=3079,freq=6.0), product of:
              0.18714455 = queryWeight, product of:
                1.7481278 = boost
                4.9436502 = idf(docFreq=843, maxDocs=43556)
                0.021654904 = queryNorm
              0.9460485 = fieldWeight in 3079, product of:
                2.4494898 = tf(freq=6.0), with freq of:
                  6.0 = termFreq=6.0
                4.9436502 = idf(docFreq=843, maxDocs=43556)
                0.078125 = fieldNorm(doc=3079)
          0.07371497 = weight(abstract_txt:much in 3079) [ClassicSimilarity], result of:
            0.07371497 = score(doc=3079,freq=1.0), product of:
              0.18961427 = queryWeight, product of:
                1.759625 = boost
                4.976164 = idf(docFreq=816, maxDocs=43556)
                0.021654904 = queryNorm
              0.3887628 = fieldWeight in 3079, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.976164 = idf(docFreq=816, maxDocs=43556)
                0.078125 = fieldNorm(doc=3079)
          0.11248736 = weight(abstract_txt:natural in 3079) [ClassicSimilarity], result of:
            0.11248736 = score(doc=3079,freq=2.0), product of:
              0.1994771 = queryWeight, product of:
                1.8048085 = boost
                5.1039414 = idf(docFreq=718, maxDocs=43556)
                0.021654904 = queryNorm
              0.56391114 = fieldWeight in 3079, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.1039414 = idf(docFreq=718, maxDocs=43556)
                0.078125 = fieldNorm(doc=3079)
          0.14433853 = weight(abstract_txt:statistical in 3079) [ClassicSimilarity], result of:
            0.14433853 = score(doc=3079,freq=2.0), product of:
              0.23554762 = queryWeight, product of:
                1.9612093 = boost
                5.546238 = idf(docFreq=461, maxDocs=43556)
                0.021654904 = queryNorm
              0.61277854 = fieldWeight in 3079, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.546238 = idf(docFreq=461, maxDocs=43556)
                0.078125 = fieldNorm(doc=3079)
          0.05958482 = weight(abstract_txt:text in 3079) [ClassicSimilarity], result of:
            0.05958482 = score(doc=3079,freq=1.0), product of:
              0.18834527 = queryWeight, product of:
                2.147868 = boost
                4.0494018 = idf(docFreq=2063, maxDocs=43556)
                0.021654904 = queryNorm
              0.31635952 = fieldWeight in 3079, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.0494018 = idf(docFreq=2063, maxDocs=43556)
                0.078125 = fieldNorm(doc=3079)
        0.28 = coord(7/25)
    
  4. Tonkin, E.L.; Tourte, G.J.L.: Working with text. tools, techniques and approaches for text mining (2016) 0.21
    0.20557761 = sum of:
      0.20557761 = product of:
        0.5710489 = sum of:
          0.04329576 = weight(abstract_txt:texts in 305) [ClassicSimilarity], result of:
            0.04329576 = score(doc=305,freq=1.0), product of:
              0.12247877 = queryWeight, product of:
                5.6559367 = idf(docFreq=413, maxDocs=43556)
                0.021654904 = queryNorm
              0.35349604 = fieldWeight in 305, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.6559367 = idf(docFreq=413, maxDocs=43556)
                0.0625 = fieldNorm(doc=305)
          0.049792938 = weight(abstract_txt:language in 305) [ClassicSimilarity], result of:
            0.049792938 = score(doc=305,freq=2.0), product of:
              0.1344443 = queryWeight, product of:
                1.4816847 = boost
                4.1901574 = idf(docFreq=1792, maxDocs=43556)
                0.021654904 = queryNorm
              0.3703611 = fieldWeight in 305, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.1901574 = idf(docFreq=1792, maxDocs=43556)
                0.0625 = fieldNorm(doc=305)
          0.039360803 = weight(abstract_txt:indexing in 305) [ClassicSimilarity], result of:
            0.039360803 = score(doc=305,freq=1.0), product of:
              0.144816 = queryWeight, product of:
                1.5377753 = boost
                4.3487797 = idf(docFreq=1529, maxDocs=43556)
                0.021654904 = queryNorm
              0.27179873 = fieldWeight in 305, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.3487797 = idf(docFreq=1529, maxDocs=43556)
                0.0625 = fieldNorm(doc=305)
          0.044429563 = weight(abstract_txt:techniques in 305) [ClassicSimilarity], result of:
            0.044429563 = score(doc=305,freq=1.0), product of:
              0.156996 = queryWeight, product of:
                1.6011385 = boost
                4.527969 = idf(docFreq=1278, maxDocs=43556)
                0.021654904 = queryNorm
              0.28299806 = fieldWeight in 305, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.527969 = idf(docFreq=1278, maxDocs=43556)
                0.0625 = fieldNorm(doc=305)
          0.05485057 = weight(abstract_txt:book in 305) [ClassicSimilarity], result of:
            0.05485057 = score(doc=305,freq=1.0), product of:
              0.18067358 = queryWeight, product of:
                1.7176391 = boost
                4.857429 = idf(docFreq=919, maxDocs=43556)
                0.021654904 = queryNorm
              0.3035893 = fieldWeight in 305, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.857429 = idf(docFreq=919, maxDocs=43556)
                0.0625 = fieldNorm(doc=305)
          0.057823576 = weight(abstract_txt:processing in 305) [ClassicSimilarity], result of:
            0.057823576 = score(doc=305,freq=1.0), product of:
              0.18714455 = queryWeight, product of:
                1.7481278 = boost
                4.9436502 = idf(docFreq=843, maxDocs=43556)
                0.021654904 = queryNorm
              0.30897814 = fieldWeight in 305, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.9436502 = idf(docFreq=843, maxDocs=43556)
                0.0625 = fieldNorm(doc=305)
          0.063632466 = weight(abstract_txt:natural in 305) [ClassicSimilarity], result of:
            0.063632466 = score(doc=305,freq=1.0), product of:
              0.1994771 = queryWeight, product of:
                1.8048085 = boost
                5.1039414 = idf(docFreq=718, maxDocs=43556)
                0.021654904 = queryNorm
              0.31899634 = fieldWeight in 305, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.1039414 = idf(docFreq=718, maxDocs=43556)
                0.0625 = fieldNorm(doc=305)
          0.06712424 = weight(abstract_txt:automatic in 305) [ClassicSimilarity], result of:
            0.06712424 = score(doc=305,freq=1.0), product of:
              0.20670936 = queryWeight, product of:
                1.8372349 = boost
                5.195642 = idf(docFreq=655, maxDocs=43556)
                0.021654904 = queryNorm
              0.32472762 = fieldWeight in 305, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.195642 = idf(docFreq=655, maxDocs=43556)
                0.0625 = fieldNorm(doc=305)
          0.150739 = weight(abstract_txt:text in 305) [ClassicSimilarity], result of:
            0.150739 = score(doc=305,freq=10.0), product of:
              0.18834527 = queryWeight, product of:
                2.147868 = boost
                4.0494018 = idf(docFreq=2063, maxDocs=43556)
                0.021654904 = queryNorm
              0.8003333 = fieldWeight in 305, product of:
                3.1622777 = tf(freq=10.0), with freq of:
                  10.0 = termFreq=10.0
                4.0494018 = idf(docFreq=2063, maxDocs=43556)
                0.0625 = fieldNorm(doc=305)
        0.36 = coord(9/25)
    
  5. Manning, C.D.; Schütze, H.: Foundations of statistical natural language processing (2000) 0.18
    0.18286665 = sum of:
      0.18286665 = product of:
        0.7619444 = sum of:
          0.0746894 = weight(abstract_txt:language in 3601) [ClassicSimilarity], result of:
            0.0746894 = score(doc=3601,freq=2.0), product of:
              0.1344443 = queryWeight, product of:
                1.4816847 = boost
                4.1901574 = idf(docFreq=1792, maxDocs=43556)
                0.021654904 = queryNorm
              0.55554163 = fieldWeight in 3601, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.1901574 = idf(docFreq=1792, maxDocs=43556)
                0.09375 = fieldNorm(doc=3601)
          0.11635563 = weight(abstract_txt:book in 3601) [ClassicSimilarity], result of:
            0.11635563 = score(doc=3601,freq=2.0), product of:
              0.18067358 = queryWeight, product of:
                1.7176391 = boost
                4.857429 = idf(docFreq=919, maxDocs=43556)
                0.021654904 = queryNorm
              0.6440102 = fieldWeight in 3601, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.857429 = idf(docFreq=919, maxDocs=43556)
                0.09375 = fieldNorm(doc=3601)
          0.12266232 = weight(abstract_txt:processing in 3601) [ClassicSimilarity], result of:
            0.12266232 = score(doc=3601,freq=2.0), product of:
              0.18714455 = queryWeight, product of:
                1.7481278 = boost
                4.9436502 = idf(docFreq=843, maxDocs=43556)
                0.021654904 = queryNorm
              0.6554416 = fieldWeight in 3601, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.9436502 = idf(docFreq=843, maxDocs=43556)
                0.09375 = fieldNorm(doc=3601)
          0.13498484 = weight(abstract_txt:natural in 3601) [ClassicSimilarity], result of:
            0.13498484 = score(doc=3601,freq=2.0), product of:
              0.1994771 = queryWeight, product of:
                1.8048085 = boost
                5.1039414 = idf(docFreq=718, maxDocs=43556)
                0.021654904 = queryNorm
              0.6766934 = fieldWeight in 3601, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.1039414 = idf(docFreq=718, maxDocs=43556)
                0.09375 = fieldNorm(doc=3601)
          0.21213344 = weight(abstract_txt:statistical in 3601) [ClassicSimilarity], result of:
            0.21213344 = score(doc=3601,freq=3.0), product of:
              0.23554762 = queryWeight, product of:
                1.9612093 = boost
                5.546238 = idf(docFreq=461, maxDocs=43556)
                0.021654904 = queryNorm
              0.90059686 = fieldWeight in 3601, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                5.546238 = idf(docFreq=461, maxDocs=43556)
                0.09375 = fieldNorm(doc=3601)
          0.10111879 = weight(abstract_txt:text in 3601) [ClassicSimilarity], result of:
            0.10111879 = score(doc=3601,freq=2.0), product of:
              0.18834527 = queryWeight, product of:
                2.147868 = boost
                4.0494018 = idf(docFreq=2063, maxDocs=43556)
                0.021654904 = queryNorm
              0.5368799 = fieldWeight in 3601, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.0494018 = idf(docFreq=2063, maxDocs=43556)
                0.09375 = fieldNorm(doc=3601)
        0.24 = coord(6/25)