Document (#32820)

Author
MacFarlane, A.
McCann, J.A.
Robertson, S.E.
Title
Parallel methods for the update of partitioned inverted files
Source
Aslib proceedings. 59(2007) no.4/5, S.367-396
Year
2007
Abstract
Purpose - An issue that tends to be ignored in information retrieval is the issue of updating inverted files. This is largely because inverted files were devised to provide fast query service, and much work has been done with the emphasis strongly on queries. This paper aims to study the effect of using parallel methods for the update of inverted files in order to reduce costs, by looking at two types of partitioning for inverted files: document identifier and term identifier. Design/methodology/approach - Raw update service and update with query service are studied with these partitioning schemes using an incremental update strategy. The paper uses standard measures used in parallel computing such as speedup to examine the computing results and also the costs of reorganising indexes while servicing transactions. Findings - Empirical results show that for both transaction processing and index reorganisation the document identifier method is superior. However, there is evidence that the term identifier partitioning method could be useful in a concurrent transaction processing context. Practical implications - There is an increasing need to service updates, which is now becoming a requirement of inverted files (for dynamic collections such as the web), demonstrating that a shift in requirements of inverted file maintenance is needed from the past. Originality/value - The paper is of value to database administrators who manage large-scale and dynamic text collections, and who need to use parallel computing to implement their text retrieval services.
Theme
Retrievalalgorithmen

Similar documents (author)

  1. MacFarlane, A.; Robertson, S.E.; McCann, J.A.: Parallel computing for passage retrieval (2004) 4.22 
    4.2223167 = sum of:
  4.2223167 = sum of:
    1.6064181 = weight(author_txt:robertson in 5108) [ClassicSimilarity], result of:
      1.6064181 = score(doc=5108,freq=1.0), product of:
        0.58562726 = queryWeight, product of:
          7.314861 = idf(docFreq=79, maxDocs=44218)
          0.08005993 = queryNorm
        2.7430727 = fieldWeight in 5108, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          7.314861 = idf(docFreq=79, maxDocs=44218)
          0.375 = fieldNorm(doc=5108)
    2.6158984 = weight(author_txt:macfarlane in 5108) [ClassicSimilarity], result of:
      2.6158984 = score(doc=5108,freq=1.0), product of:
        0.81058043 = queryWeight, product of:
          1.1764878 = boost
          8.6058445 = idf(docFreq=21, maxDocs=44218)
          0.08005993 = queryNorm
        3.2271917 = fieldWeight in 5108, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          8.6058445 = idf(docFreq=21, maxDocs=44218)
          0.375 = fieldNorm(doc=5108)
  2. MacFarlane, A.; Robertson, S.E.; McCann, J.A.: Parallel computing in information retrieval : an updated review (1997) 4.22 
    4.2223167 = sum of:
  4.2223167 = sum of:
    1.6064181 = weight(author_txt:robertson in 7450) [ClassicSimilarity], result of:
      1.6064181 = score(doc=7450,freq=1.0), product of:
        0.58562726 = queryWeight, product of:
          7.314861 = idf(docFreq=79, maxDocs=44218)
          0.08005993 = queryNorm
        2.7430727 = fieldWeight in 7450, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          7.314861 = idf(docFreq=79, maxDocs=44218)
          0.375 = fieldNorm(doc=7450)
    2.6158984 = weight(author_txt:macfarlane in 7450) [ClassicSimilarity], result of:
      2.6158984 = score(doc=7450,freq=1.0), product of:
        0.81058043 = queryWeight, product of:
          1.1764878 = boost
          8.6058445 = idf(docFreq=21, maxDocs=44218)
          0.08005993 = queryNorm
        3.2271917 = fieldWeight in 7450, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          8.6058445 = idf(docFreq=21, maxDocs=44218)
          0.375 = fieldNorm(doc=7450)
  3. MacFarlane, A.; McCann, J.A.; Robertson, S.E.: Parallel methods for the generation of partitioned inverted files (2005) 4.22 
    4.2223167 = sum of:
  4.2223167 = sum of:
    1.6064181 = weight(author_txt:robertson in 651) [ClassicSimilarity], result of:
      1.6064181 = score(doc=651,freq=1.0), product of:
        0.58562726 = queryWeight, product of:
          7.314861 = idf(docFreq=79, maxDocs=44218)
          0.08005993 = queryNorm
        2.7430727 = fieldWeight in 651, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          7.314861 = idf(docFreq=79, maxDocs=44218)
          0.375 = fieldNorm(doc=651)
    2.6158984 = weight(author_txt:macfarlane in 651) [ClassicSimilarity], result of:
      2.6158984 = score(doc=651,freq=1.0), product of:
        0.81058043 = queryWeight, product of:
          1.1764878 = boost
          8.6058445 = idf(docFreq=21, maxDocs=44218)
          0.08005993 = queryNorm
        3.2271917 = fieldWeight in 651, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          8.6058445 = idf(docFreq=21, maxDocs=44218)
          0.375 = fieldNorm(doc=651)
  4. MacFarlane, A.: On open source IR (2003) 2.18 
    2.1799152 = sum of:
  2.1799152 = product of:
    4.3598304 = sum of:
      4.3598304 = weight(author_txt:macfarlane in 2010) [ClassicSimilarity], result of:
        4.3598304 = score(doc=2010,freq=1.0), product of:
          0.81058043 = queryWeight, product of:
            1.1764878 = boost
            8.6058445 = idf(docFreq=21, maxDocs=44218)
            0.08005993 = queryNorm
          5.3786526 = fieldWeight in 2010, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            8.6058445 = idf(docFreq=21, maxDocs=44218)
            0.625 = fieldNorm(doc=2010)
    0.5 = coord(1/2)
  5. MacFarlane, A.: Evaluation of web search for the information practitioner (2007) 2.18 
    2.1799152 = sum of:
  2.1799152 = product of:
    4.3598304 = sum of:
      4.3598304 = weight(author_txt:macfarlane in 817) [ClassicSimilarity], result of:
        4.3598304 = score(doc=817,freq=1.0), product of:
          0.81058043 = queryWeight, product of:
            1.1764878 = boost
            8.6058445 = idf(docFreq=21, maxDocs=44218)
            0.08005993 = queryNorm
          5.3786526 = fieldWeight in 817, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            8.6058445 = idf(docFreq=21, maxDocs=44218)
            0.625 = fieldNorm(doc=817)
    0.5 = coord(1/2)

Similar documents (content)

  1. MacFarlane, A.; McCann, J.A.; Robertson, S.E.: Parallel methods for the generation of partitioned inverted files (2005) 0.63 
    0.63037455 = sum of:
  0.63037455 = product of:
    1.3132803 = sum of:
      0.021130268 = weight(abstract_txt:value in 651) [ClassicSimilarity], result of:
        0.021130268 = score(doc=651,freq=2.0), product of:
          0.054675195 = queryWeight, product of:
            1.0185876 = boost
            4.3723974 = idf(docFreq=1516, maxDocs=44218)
            0.012276437 = queryNorm
          0.38646898 = fieldWeight in 651, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            4.3723974 = idf(docFreq=1516, maxDocs=44218)
            0.0625 = fieldNorm(doc=651)
      0.023049345 = weight(abstract_txt:method in 651) [ClassicSimilarity], result of:
        0.023049345 = score(doc=651,freq=2.0), product of:
          0.05793746 = queryWeight, product of:
            1.048535 = boost
            4.50095 = idf(docFreq=1333, maxDocs=44218)
            0.012276437 = queryNorm
          0.3978315 = fieldWeight in 651, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            4.50095 = idf(docFreq=1333, maxDocs=44218)
            0.0625 = fieldNorm(doc=651)
      0.06641613 = weight(abstract_txt:partitioned in 651) [ClassicSimilarity], result of:
        0.06641613 = score(doc=651,freq=1.0), product of:
          0.117319286 = queryWeight, product of:
            1.0550497 = boost
            9.05783 = idf(docFreq=13, maxDocs=44218)
            0.012276437 = queryNorm
          0.56611437 = fieldWeight in 651, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            9.05783 = idf(docFreq=13, maxDocs=44218)
            0.0625 = fieldNorm(doc=651)
      0.018484637 = weight(abstract_txt:collections in 651) [ClassicSimilarity], result of:
        0.018484637 = score(doc=651,freq=1.0), product of:
          0.06300925 = queryWeight, product of:
            1.0934662 = boost
            4.693822 = idf(docFreq=1099, maxDocs=44218)
            0.012276437 = queryNorm
          0.29336387 = fieldWeight in 651, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.693822 = idf(docFreq=1099, maxDocs=44218)
            0.0625 = fieldNorm(doc=651)
      0.006725624 = weight(abstract_txt:that in 651) [ClassicSimilarity], result of:
        0.006725624 = score(doc=651,freq=2.0), product of:
          0.032113336 = queryWeight, product of:
            1.1039792 = boost
            2.3694751 = idf(docFreq=11241, maxDocs=44218)
            0.012276437 = queryNorm
          0.20943399 = fieldWeight in 651, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            2.3694751 = idf(docFreq=11241, maxDocs=44218)
            0.0625 = fieldNorm(doc=651)
      0.011176999 = weight(abstract_txt:paper in 651) [ClassicSimilarity], result of:
        0.011176999 = score(doc=651,freq=1.0), product of:
          0.051575594 = queryWeight, product of:
            1.2116326 = boost
            3.467376 = idf(docFreq=3749, maxDocs=44218)
            0.012276437 = queryNorm
          0.216711 = fieldWeight in 651, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            3.467376 = idf(docFreq=3749, maxDocs=44218)
            0.0625 = fieldNorm(doc=651)
      0.04250963 = weight(abstract_txt:costs in 651) [ClassicSimilarity], result of:
        0.04250963 = score(doc=651,freq=1.0), product of:
          0.10977966 = queryWeight, product of:
            1.443325 = boost
            6.195629 = idf(docFreq=244, maxDocs=44218)
            0.012276437 = queryNorm
          0.38722682 = fieldWeight in 651, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            6.195629 = idf(docFreq=244, maxDocs=44218)
            0.0625 = fieldNorm(doc=651)
      0.10132144 = weight(abstract_txt:computing in 651) [ClassicSimilarity], result of:
        0.10132144 = score(doc=651,freq=3.0), product of:
          0.15547286 = queryWeight, product of:
            2.1036627 = boost
            6.0201335 = idf(docFreq=291, maxDocs=44218)
            0.012276437 = queryNorm
          0.6516985 = fieldWeight in 651, product of:
            1.7320508 = tf(freq=3.0), with freq of:
              3.0 = termFreq=3.0
            6.0201335 = idf(docFreq=291, maxDocs=44218)
            0.0625 = fieldNorm(doc=651)
      0.16335946 = weight(abstract_txt:parallel in 651) [ClassicSimilarity], result of:
        0.16335946 = score(doc=651,freq=3.0), product of:
          0.23528603 = queryWeight, product of:
            2.9882455 = boost
            6.4136834 = idf(docFreq=196, maxDocs=44218)
            0.012276437 = queryNorm
          0.6943016 = fieldWeight in 651, product of:
            1.7320508 = tf(freq=3.0), with freq of:
              3.0 = termFreq=3.0
            6.4136834 = idf(docFreq=196, maxDocs=44218)
            0.0625 = fieldNorm(doc=651)
      0.26950052 = weight(abstract_txt:partitioning in 651) [ClassicSimilarity], result of:
        0.26950052 = score(doc=651,freq=2.0), product of:
          0.34165716 = queryWeight, product of:
            3.118488 = boost
            8.924298 = idf(docFreq=15, maxDocs=44218)
            0.012276437 = queryNorm
          0.788804 = fieldWeight in 651, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            8.924298 = idf(docFreq=15, maxDocs=44218)
            0.0625 = fieldNorm(doc=651)
      0.10038356 = weight(abstract_txt:files in 651) [ClassicSimilarity], result of:
        0.10038356 = score(doc=651,freq=1.0), product of:
          0.28076684 = queryWeight, product of:
            3.9979446 = boost
            5.720536 = idf(docFreq=393, maxDocs=44218)
            0.012276437 = queryNorm
          0.3575335 = fieldWeight in 651, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.720536 = idf(docFreq=393, maxDocs=44218)
            0.0625 = fieldNorm(doc=651)
      0.48922274 = weight(abstract_txt:inverted in 651) [ClassicSimilarity], result of:
        0.48922274 = score(doc=651,freq=3.0), product of:
          0.5890928 = queryWeight, product of:
            6.2550254 = boost
            7.6715355 = idf(docFreq=55, maxDocs=44218)
            0.012276437 = queryNorm
          0.83046806 = fieldWeight in 651, product of:
            1.7320508 = tf(freq=3.0), with freq of:
              3.0 = termFreq=3.0
            7.6715355 = idf(docFreq=55, maxDocs=44218)
            0.0625 = fieldNorm(doc=651)
    0.48 = coord(12/25)
  2. Cheng, C.-S.; Chung, C.-P.; Shann, J.J.-J.: Fast query evaluation through document identifier assignment for inverted file-based information retrieval systems (2006) 0.24 
    0.23793395 = sum of:
  0.23793395 = product of:
    0.7435436 = sum of:
      0.02827645 = weight(abstract_txt:document in 979) [ClassicSimilarity], result of:
        0.02827645 = score(doc=979,freq=4.0), product of:
          0.052697934 = queryWeight, product of:
            4.2926083 = idf(docFreq=1642, maxDocs=44218)
            0.012276437 = queryNorm
          0.53657603 = fieldWeight in 979, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            4.2926083 = idf(docFreq=1642, maxDocs=44218)
            0.0625 = fieldNorm(doc=979)
      0.009511469 = weight(abstract_txt:that in 979) [ClassicSimilarity], result of:
        0.009511469 = score(doc=979,freq=4.0), product of:
          0.032113336 = queryWeight, product of:
            1.1039792 = boost
            2.3694751 = idf(docFreq=11241, maxDocs=44218)
            0.012276437 = queryNorm
          0.2961844 = fieldWeight in 979, product of:
            2.0 = tf(freq=4.0), with freq of:
              4.0 = termFreq=4.0
            2.3694751 = idf(docFreq=11241, maxDocs=44218)
            0.0625 = fieldNorm(doc=979)
      0.05080344 = weight(abstract_txt:query in 979) [ClassicSimilarity], result of:
        0.05080344 = score(doc=979,freq=7.0), product of:
          0.06462885 = queryWeight, product of:
            1.1074303 = boost
            4.7537646 = idf(docFreq=1035, maxDocs=44218)
            0.012276437 = queryNorm
          0.78607994 = fieldWeight in 979, product of:
            2.6457512 = tf(freq=7.0), with freq of:
              7.0 = termFreq=7.0
            4.7537646 = idf(docFreq=1035, maxDocs=44218)
            0.0625 = fieldNorm(doc=979)
      0.037138194 = weight(abstract_txt:processing in 979) [ClassicSimilarity], result of:
        0.037138194 = score(doc=979,freq=3.0), product of:
          0.06956174 = queryWeight, product of:
            1.1489164 = boost
            4.931848 = idf(docFreq=866, maxDocs=44218)
            0.012276437 = queryNorm
          0.5338882 = fieldWeight in 979, product of:
            1.7320508 = tf(freq=3.0), with freq of:
              3.0 = termFreq=3.0
            4.931848 = idf(docFreq=866, maxDocs=44218)
            0.0625 = fieldNorm(doc=979)
      0.011176999 = weight(abstract_txt:paper in 979) [ClassicSimilarity], result of:
        0.011176999 = score(doc=979,freq=1.0), product of:
          0.051575594 = queryWeight, product of:
            1.2116326 = boost
            3.467376 = idf(docFreq=3749, maxDocs=44218)
            0.012276437 = queryNorm
          0.216711 = fieldWeight in 979, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            3.467376 = idf(docFreq=3749, maxDocs=44218)
            0.0625 = fieldNorm(doc=979)
      0.09431563 = weight(abstract_txt:parallel in 979) [ClassicSimilarity], result of:
        0.09431563 = score(doc=979,freq=1.0), product of:
          0.23528603 = queryWeight, product of:
            2.9882455 = boost
            6.4136834 = idf(docFreq=196, maxDocs=44218)
            0.012276437 = queryNorm
          0.4008552 = fieldWeight in 979, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            6.4136834 = idf(docFreq=196, maxDocs=44218)
            0.0625 = fieldNorm(doc=979)
      0.22986856 = weight(abstract_txt:identifier in 979) [ClassicSimilarity], result of:
        0.22986856 = score(doc=979,freq=2.0), product of:
          0.33820763 = queryWeight, product of:
            3.5826955 = boost
            7.689554 = idf(docFreq=54, maxDocs=44218)
            0.012276437 = queryNorm
          0.679667 = fieldWeight in 979, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            7.689554 = idf(docFreq=54, maxDocs=44218)
            0.0625 = fieldNorm(doc=979)
      0.28245288 = weight(abstract_txt:inverted in 979) [ClassicSimilarity], result of:
        0.28245288 = score(doc=979,freq=1.0), product of:
          0.5890928 = queryWeight, product of:
            6.2550254 = boost
            7.6715355 = idf(docFreq=55, maxDocs=44218)
            0.012276437 = queryNorm
          0.47947097 = fieldWeight in 979, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            7.6715355 = idf(docFreq=55, maxDocs=44218)
            0.0625 = fieldNorm(doc=979)
    0.32 = coord(8/25)
  3. Carterette, B.; Can, F.: Comparing inverted files and signature files for searching a large lexicon (2005) 0.22 
    0.2206757 = sum of:
  0.2206757 = product of:
    0.9194821 = sum of:
      0.028811682 = weight(abstract_txt:method in 1029) [ClassicSimilarity], result of:
        0.028811682 = score(doc=1029,freq=2.0), product of:
          0.05793746 = queryWeight, product of:
            1.048535 = boost
            4.50095 = idf(docFreq=1333, maxDocs=44218)
            0.012276437 = queryNorm
          0.49728936 = fieldWeight in 1029, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            4.50095 = idf(docFreq=1333, maxDocs=44218)
            0.078125 = fieldNorm(doc=1029)
      0.023105795 = weight(abstract_txt:collections in 1029) [ClassicSimilarity], result of:
        0.023105795 = score(doc=1029,freq=1.0), product of:
          0.06300925 = queryWeight, product of:
            1.0934662 = boost
            4.693822 = idf(docFreq=1099, maxDocs=44218)
            0.012276437 = queryNorm
          0.36670482 = fieldWeight in 1029, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.693822 = idf(docFreq=1099, maxDocs=44218)
            0.078125 = fieldNorm(doc=1029)
      0.024728158 = weight(abstract_txt:term in 1029) [ClassicSimilarity], result of:
        0.024728158 = score(doc=1029,freq=1.0), product of:
          0.06592521 = queryWeight, product of:
            1.1184819 = boost
            4.8012047 = idf(docFreq=987, maxDocs=44218)
            0.012276437 = queryNorm
          0.37509412 = fieldWeight in 1029, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.8012047 = idf(docFreq=987, maxDocs=44218)
            0.078125 = fieldNorm(doc=1029)
      0.013971248 = weight(abstract_txt:paper in 1029) [ClassicSimilarity], result of:
        0.013971248 = score(doc=1029,freq=1.0), product of:
          0.051575594 = queryWeight, product of:
            1.2116326 = boost
            3.467376 = idf(docFreq=3749, maxDocs=44218)
            0.012276437 = queryNorm
          0.27088875 = fieldWeight in 1029, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            3.467376 = idf(docFreq=3749, maxDocs=44218)
            0.078125 = fieldNorm(doc=1029)
      0.21733677 = weight(abstract_txt:files in 1029) [ClassicSimilarity], result of:
        0.21733677 = score(doc=1029,freq=3.0), product of:
          0.28076684 = queryWeight, product of:
            3.9979446 = boost
            5.720536 = idf(docFreq=393, maxDocs=44218)
            0.012276437 = queryNorm
          0.7740828 = fieldWeight in 1029, product of:
            1.7320508 = tf(freq=3.0), with freq of:
              3.0 = termFreq=3.0
            5.720536 = idf(docFreq=393, maxDocs=44218)
            0.078125 = fieldNorm(doc=1029)
      0.61152846 = weight(abstract_txt:inverted in 1029) [ClassicSimilarity], result of:
        0.61152846 = score(doc=1029,freq=3.0), product of:
          0.5890928 = queryWeight, product of:
            6.2550254 = boost
            7.6715355 = idf(docFreq=55, maxDocs=44218)
            0.012276437 = queryNorm
          1.0380851 = fieldWeight in 1029, product of:
            1.7320508 = tf(freq=3.0), with freq of:
              3.0 = termFreq=3.0
            7.6715355 = idf(docFreq=55, maxDocs=44218)
            0.078125 = fieldNorm(doc=1029)
    0.24 = coord(6/25)
  4. Harman, D.; Fox, E.; Baeza-Yates, R.; Lee, W.: Inverted files (1992) 0.22 
    0.21653636 = sum of:
  0.21653636 = product of:
    1.0826818 = sum of:
      0.0325967 = weight(abstract_txt:method in 3497) [ClassicSimilarity], result of:
        0.0325967 = score(doc=3497,freq=1.0), product of:
          0.05793746 = queryWeight, product of:
            1.048535 = boost
            4.50095 = idf(docFreq=1333, maxDocs=44218)
            0.012276437 = queryNorm
          0.56261873 = fieldWeight in 3497, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.50095 = idf(docFreq=1333, maxDocs=44218)
            0.125 = fieldNorm(doc=3497)
      0.036969274 = weight(abstract_txt:collections in 3497) [ClassicSimilarity], result of:
        0.036969274 = score(doc=3497,freq=1.0), product of:
          0.06300925 = queryWeight, product of:
            1.0934662 = boost
            4.693822 = idf(docFreq=1099, maxDocs=44218)
            0.012276437 = queryNorm
          0.58672774 = fieldWeight in 3497, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.693822 = idf(docFreq=1099, maxDocs=44218)
            0.125 = fieldNorm(doc=3497)
      0.013451248 = weight(abstract_txt:that in 3497) [ClassicSimilarity], result of:
        0.013451248 = score(doc=3497,freq=2.0), product of:
          0.032113336 = queryWeight, product of:
            1.1039792 = boost
            2.3694751 = idf(docFreq=11241, maxDocs=44218)
            0.012276437 = queryNorm
          0.41886798 = fieldWeight in 3497, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            2.3694751 = idf(docFreq=11241, maxDocs=44218)
            0.125 = fieldNorm(doc=3497)
      0.20076711 = weight(abstract_txt:files in 3497) [ClassicSimilarity], result of:
        0.20076711 = score(doc=3497,freq=1.0), product of:
          0.28076684 = queryWeight, product of:
            3.9979446 = boost
            5.720536 = idf(docFreq=393, maxDocs=44218)
            0.012276437 = queryNorm
          0.715067 = fieldWeight in 3497, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            5.720536 = idf(docFreq=393, maxDocs=44218)
            0.125 = fieldNorm(doc=3497)
      0.79889745 = weight(abstract_txt:inverted in 3497) [ClassicSimilarity], result of:
        0.79889745 = score(doc=3497,freq=2.0), product of:
          0.5890928 = queryWeight, product of:
            6.2550254 = boost
            7.6715355 = idf(docFreq=55, maxDocs=44218)
            0.012276437 = queryNorm
          1.3561487 = fieldWeight in 3497, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            7.6715355 = idf(docFreq=55, maxDocs=44218)
            0.125 = fieldNorm(doc=3497)
    0.2 = coord(5/25)
  5. Shieh, W.-Y.; Chung, C.-P.: ¬A statistics-based approach to incrementally update inverted files (2005) 0.20 
    0.20249183 = sum of:
  0.20249183 = product of:
    1.0124592 = sum of:
      0.01767278 = weight(abstract_txt:document in 1010) [ClassicSimilarity], result of:
        0.01767278 = score(doc=1010,freq=1.0), product of:
          0.052697934 = queryWeight, product of:
            4.2926083 = idf(docFreq=1642, maxDocs=44218)
            0.012276437 = queryNorm
          0.33536002 = fieldWeight in 1010, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            4.2926083 = idf(docFreq=1642, maxDocs=44218)
            0.078125 = fieldNorm(doc=1010)
      0.00840703 = weight(abstract_txt:that in 1010) [ClassicSimilarity], result of:
        0.00840703 = score(doc=1010,freq=2.0), product of:
          0.032113336 = queryWeight, product of:
            1.1039792 = boost
            2.3694751 = idf(docFreq=11241, maxDocs=44218)
            0.012276437 = queryNorm
          0.26179248 = fieldWeight in 1010, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            2.3694751 = idf(docFreq=11241, maxDocs=44218)
            0.078125 = fieldNorm(doc=1010)
      0.013971248 = weight(abstract_txt:paper in 1010) [ClassicSimilarity], result of:
        0.013971248 = score(doc=1010,freq=1.0), product of:
          0.051575594 = queryWeight, product of:
            1.2116326 = boost
            3.467376 = idf(docFreq=3749, maxDocs=44218)
            0.012276437 = queryNorm
          0.27088875 = fieldWeight in 1010, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            3.467376 = idf(docFreq=3749, maxDocs=44218)
            0.078125 = fieldNorm(doc=1010)
      0.18292822 = weight(abstract_txt:update in 1010) [ClassicSimilarity], result of:
        0.18292822 = score(doc=1010,freq=1.0), product of:
          0.3396963 = queryWeight, product of:
            4.0143814 = boost
            6.892866 = idf(docFreq=121, maxDocs=44218)
            0.012276437 = queryNorm
          0.5385052 = fieldWeight in 1010, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            6.892866 = idf(docFreq=121, maxDocs=44218)
            0.078125 = fieldNorm(doc=1010)
      0.78947985 = weight(abstract_txt:inverted in 1010) [ClassicSimilarity], result of:
        0.78947985 = score(doc=1010,freq=5.0), product of:
          0.5890928 = queryWeight, product of:
            6.2550254 = boost
            7.6715355 = idf(docFreq=55, maxDocs=44218)
            0.012276437 = queryNorm
          1.3401622 = fieldWeight in 1010, product of:
            2.236068 = tf(freq=5.0), with freq of:
              5.0 = termFreq=5.0
            7.6715355 = idf(docFreq=55, maxDocs=44218)
            0.078125 = fieldNorm(doc=1010)
    0.2 = coord(5/25)