Document (#25304)

Author

Bar-Ilan, J.

Title

Methods for measuring search engine performance over time

Source

Journal of the American Society for Information Science and technology. 53(2002) no.4, S.308-319

Year

2002

Abstract

This study introduces methods for evaluating search engine performance over a time period. Several measures are defined, which as a whole describe search engine functionality over time. The necessary setup for such studies is described, and the use of these measures is illustrated through a specific example. The set of measures introduced here may serve as a guideline for the search engines for testing and improving their functionality. We recommend setting up a standard suite of measures for evaluating search engine performance.

Theme

Suchmaschinen
Retrievalstudien

Similar documents (author)

1. Ilan, J. Bar- => Bar-Ilan, J.: 4.28

   4.2802324 = sum of:
     4.2802324 = weight(author_txt:ilan in 390) [ClassicSimilarity], result of:
       4.2802324 = score(doc=390,freq=2.0), product of:
         0.99999994 = queryWeight, product of:
           8.070885 = idf(docFreq=36, maxDocs=43556)
           0.12390215 = queryNorm
         4.280233 = fieldWeight in 390, product of:
           1.4142135 = tf(freq=2.0), with freq of:
             2.0 = termFreq=2.0
           8.070885 = idf(docFreq=36, maxDocs=43556)
           0.375 = fieldNorm(doc=390)
   

2. Ilan, E. Bar- => Bar-Ilan, E.: 4.28

   4.2802324 = sum of:
     4.2802324 = weight(author_txt:ilan in 391) [ClassicSimilarity], result of:
       4.2802324 = score(doc=391,freq=2.0), product of:
         0.99999994 = queryWeight, product of:
           8.070885 = idf(docFreq=36, maxDocs=43556)
           0.12390215 = queryNorm
         4.280233 = fieldWeight in 391, product of:
           1.4142135 = tf(freq=2.0), with freq of:
             2.0 = termFreq=2.0
           8.070885 = idf(docFreq=36, maxDocs=43556)
           0.375 = fieldNorm(doc=391)
   

3. Bar-Ilan, J.: Information hub blogs (2005) 4.04

   4.035442 = sum of:
     4.035442 = weight(author_txt:ilan in 193) [ClassicSimilarity], result of:
       4.035442 = score(doc=193,freq=1.0), product of:
         0.99999994 = queryWeight, product of:
           8.070885 = idf(docFreq=36, maxDocs=43556)
           0.12390215 = queryNorm
         4.0354424 = fieldWeight in 193, product of:
           1.0 = tf(freq=1.0), with freq of:
             1.0 = termFreq=1.0
           8.070885 = idf(docFreq=36, maxDocs=43556)
           0.5 = fieldNorm(doc=193)
   

4. Bar-Ilan, J.: Evaluating the stability of the search tools Hotbot and Snap : a case study (2000) 4.04

   4.035442 = sum of:
     4.035442 = weight(author_txt:ilan in 2178) [ClassicSimilarity], result of:
       4.035442 = score(doc=2178,freq=1.0), product of:
         0.99999994 = queryWeight, product of:
           8.070885 = idf(docFreq=36, maxDocs=43556)
           0.12390215 = queryNorm
         4.0354424 = fieldWeight in 2178, product of:
           1.0 = tf(freq=1.0), with freq of:
             1.0 = termFreq=1.0
           8.070885 = idf(docFreq=36, maxDocs=43556)
           0.5 = fieldNorm(doc=2178)
   

5. Bar-Ilan, J.: On the overlap, the precision and estimated recall of search engines : a case study of the query 'Erdös' (1998) 4.04

   4.035442 = sum of:
     4.035442 = weight(author_txt:ilan in 4751) [ClassicSimilarity], result of:
       4.035442 = score(doc=4751,freq=1.0), product of:
         0.99999994 = queryWeight, product of:
           8.070885 = idf(docFreq=36, maxDocs=43556)
           0.12390215 = queryNorm
         4.0354424 = fieldWeight in 4751, product of:
           1.0 = tf(freq=1.0), with freq of:
             1.0 = termFreq=1.0
           8.070885 = idf(docFreq=36, maxDocs=43556)
           0.5 = fieldNorm(doc=4751)
   

Similar documents (content)

1. Bar-Ilan, J.; Peritz, B.C.: ¬A method for measuring the evolution of a topic on the Web : the case of "informetrics" (2009) 0.22

   0.21667318 = sum of:
     0.21667318 = product of:
       0.60186994 = sum of:
         0.032323148 = weight(abstract_txt:necessary in 87) [ClassicSimilarity], result of:
           0.032323148 = score(doc=87,freq=1.0), product of:
             0.095879816 = queryWeight, product of:
               5.3939443 = idf(docFreq=537, maxDocs=43556)
               0.017775455 = queryNorm
             0.33712152 = fieldWeight in 87, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.3939443 = idf(docFreq=537, maxDocs=43556)
               0.0625 = fieldNorm(doc=87)
         0.034614224 = weight(abstract_txt:here in 87) [ClassicSimilarity], result of:
           0.034614224 = score(doc=87,freq=1.0), product of:
             0.100358576 = queryWeight, product of:
               1.0230895 = boost
               5.518488 = idf(docFreq=474, maxDocs=43556)
               0.017775455 = queryNorm
             0.3449055 = fieldWeight in 87, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.518488 = idf(docFreq=474, maxDocs=43556)
               0.0625 = fieldNorm(doc=87)
         0.052234177 = weight(abstract_txt:period in 87) [ClassicSimilarity], result of:
           0.052234177 = score(doc=87,freq=2.0), product of:
             0.10479597 = queryWeight, product of:
               1.0454631 = boost
               5.6391697 = idf(docFreq=420, maxDocs=43556)
               0.017775455 = queryNorm
             0.49843687 = fieldWeight in 87, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.6391697 = idf(docFreq=420, maxDocs=43556)
               0.0625 = fieldNorm(doc=87)
         0.061520338 = weight(abstract_txt:illustrated in 87) [ClassicSimilarity], result of:
           0.061520338 = score(doc=87,freq=1.0), product of:
             0.14725292 = queryWeight, product of:
               1.2392769 = boost
               6.6845903 = idf(docFreq=147, maxDocs=43556)
               0.017775455 = queryNorm
             0.4177869 = fieldWeight in 87, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.6845903 = idf(docFreq=147, maxDocs=43556)
               0.0625 = fieldNorm(doc=87)
         0.029619548 = weight(abstract_txt:methods in 87) [ClassicSimilarity], result of:
           0.029619548 = score(doc=87,freq=1.0), product of:
             0.11396733 = queryWeight, product of:
               1.5418481 = boost
               4.1583214 = idf(docFreq=1850, maxDocs=43556)
               0.017775455 = queryNorm
             0.2598951 = fieldWeight in 87, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.1583214 = idf(docFreq=1850, maxDocs=43556)
               0.0625 = fieldNorm(doc=87)
         0.06283256 = weight(abstract_txt:time in 87) [ClassicSimilarity], result of:
           0.06283256 = score(doc=87,freq=2.0), product of:
             0.17095101 = queryWeight, product of:
               2.3127723 = boost
               4.1583214 = idf(docFreq=1850, maxDocs=43556)
               0.017775455 = queryNorm
             0.36754715 = fieldWeight in 87, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.1583214 = idf(docFreq=1850, maxDocs=43556)
               0.0625 = fieldNorm(doc=87)
         0.06160246 = weight(abstract_txt:performance in 87) [ClassicSimilarity], result of:
           0.06160246 = score(doc=87,freq=1.0), product of:
             0.2125644 = queryWeight, product of:
               2.578946 = boost
               4.6368976 = idf(docFreq=1146, maxDocs=43556)
               0.017775455 = queryNorm
             0.2898061 = fieldWeight in 87, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.6368976 = idf(docFreq=1146, maxDocs=43556)
               0.0625 = fieldNorm(doc=87)
         0.07109149 = weight(abstract_txt:search in 87) [ClassicSimilarity], result of:
           0.07109149 = score(doc=87,freq=2.0), product of:
             0.22007792 = queryWeight, product of:
               3.3877366 = boost
               3.6546526 = idf(docFreq=3062, maxDocs=43556)
               0.017775455 = queryNorm
             0.3230287 = fieldWeight in 87, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.6546526 = idf(docFreq=3062, maxDocs=43556)
               0.0625 = fieldNorm(doc=87)
         0.19603206 = weight(abstract_txt:engine in 87) [ClassicSimilarity], result of:
           0.19603206 = score(doc=87,freq=2.0), product of:
             0.401741 = queryWeight, product of:
               4.093921 = boost
               5.5205956 = idf(docFreq=473, maxDocs=43556)
               0.017775455 = queryNorm
             0.48795632 = fieldWeight in 87, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.5205956 = idf(docFreq=473, maxDocs=43556)
               0.0625 = fieldNorm(doc=87)
       0.36 = coord(9/25)
   

2. Thelwall, M.: Assessing web search engines : a webometric approach (2011) 0.18

   0.18491527 = sum of:
     0.18491527 = product of:
       0.77048033 = sum of:
         0.051309984 = weight(abstract_txt:introduces in 2008) [ClassicSimilarity], result of:
           0.051309984 = score(doc=2008,freq=1.0), product of:
             0.11243788 = queryWeight, product of:
               1.0829109 = boost
               5.8411613 = idf(docFreq=343, maxDocs=43556)
               0.017775455 = queryNorm
             0.45634073 = fieldWeight in 2008, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.8411613 = idf(docFreq=343, maxDocs=43556)
               0.078125 = fieldNorm(doc=2008)
         0.055536658 = weight(abstract_txt:time in 2008) [ClassicSimilarity], result of:
           0.055536658 = score(doc=2008,freq=1.0), product of:
             0.17095101 = queryWeight, product of:
               2.3127723 = boost
               4.1583214 = idf(docFreq=1850, maxDocs=43556)
               0.017775455 = queryNorm
             0.32486886 = fieldWeight in 2008, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.1583214 = idf(docFreq=1850, maxDocs=43556)
               0.078125 = fieldNorm(doc=2008)
         0.059511647 = weight(abstract_txt:over in 2008) [ClassicSimilarity], result of:
           0.059511647 = score(doc=2008,freq=1.0), product of:
             0.17901379 = queryWeight, product of:
               2.366684 = boost
               4.255254 = idf(docFreq=1679, maxDocs=43556)
               0.017775455 = queryNorm
             0.3324417 = fieldWeight in 2008, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.255254 = idf(docFreq=1679, maxDocs=43556)
               0.078125 = fieldNorm(doc=2008)
         0.12567317 = weight(abstract_txt:search in 2008) [ClassicSimilarity], result of:
           0.12567317 = score(doc=2008,freq=4.0), product of:
             0.22007792 = queryWeight, product of:
               3.3877366 = boost
               3.6546526 = idf(docFreq=3062, maxDocs=43556)
               0.017775455 = queryNorm
             0.57103944 = fieldWeight in 2008, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               3.6546526 = idf(docFreq=3062, maxDocs=43556)
               0.078125 = fieldNorm(doc=2008)
         0.2334088 = weight(abstract_txt:measures in 2008) [ClassicSimilarity], result of:
           0.2334088 = score(doc=2008,freq=2.0), product of:
             0.3889253 = queryWeight, product of:
               4.0280933 = boost
               5.4318275 = idf(docFreq=517, maxDocs=43556)
               0.017775455 = queryNorm
             0.6001378 = fieldWeight in 2008, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.4318275 = idf(docFreq=517, maxDocs=43556)
               0.078125 = fieldNorm(doc=2008)
         0.24504007 = weight(abstract_txt:engine in 2008) [ClassicSimilarity], result of:
           0.24504007 = score(doc=2008,freq=2.0), product of:
             0.401741 = queryWeight, product of:
               4.093921 = boost
               5.5205956 = idf(docFreq=473, maxDocs=43556)
               0.017775455 = queryNorm
             0.6099454 = fieldWeight in 2008, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.5205956 = idf(docFreq=473, maxDocs=43556)
               0.078125 = fieldNorm(doc=2008)
       0.24 = coord(6/25)
   

3. Oppenheim, C.; Morris, A.; McKnight, C.: ¬The evaluation of WWW search engines (2000) 0.18

   0.18066368 = sum of:
     0.18066368 = product of:
       0.64522743 = sum of:
         0.11720894 = weight(abstract_txt:recommend in 544) [ClassicSimilarity], result of:
           0.11720894 = score(doc=544,freq=1.0), product of:
             0.19502273 = queryWeight, product of:
               1.4261954 = boost
               7.6928186 = idf(docFreq=53, maxDocs=43556)
               0.017775455 = queryNorm
             0.60100144 = fieldWeight in 544, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.6928186 = idf(docFreq=53, maxDocs=43556)
               0.078125 = fieldNorm(doc=544)
         0.037024435 = weight(abstract_txt:methods in 544) [ClassicSimilarity], result of:
           0.037024435 = score(doc=544,freq=1.0), product of:
             0.11396733 = queryWeight, product of:
               1.5418481 = boost
               4.1583214 = idf(docFreq=1850, maxDocs=43556)
               0.017775455 = queryNorm
             0.32486886 = fieldWeight in 544, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.1583214 = idf(docFreq=1850, maxDocs=43556)
               0.078125 = fieldNorm(doc=544)
         0.055536658 = weight(abstract_txt:time in 544) [ClassicSimilarity], result of:
           0.055536658 = score(doc=544,freq=1.0), product of:
             0.17095101 = queryWeight, product of:
               2.3127723 = boost
               4.1583214 = idf(docFreq=1850, maxDocs=43556)
               0.017775455 = queryNorm
             0.32486886 = fieldWeight in 544, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.1583214 = idf(docFreq=1850, maxDocs=43556)
               0.078125 = fieldNorm(doc=544)
         0.059511647 = weight(abstract_txt:over in 544) [ClassicSimilarity], result of:
           0.059511647 = score(doc=544,freq=1.0), product of:
             0.17901379 = queryWeight, product of:
               2.366684 = boost
               4.255254 = idf(docFreq=1679, maxDocs=43556)
               0.017775455 = queryNorm
             0.3324417 = fieldWeight in 544, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.255254 = idf(docFreq=1679, maxDocs=43556)
               0.078125 = fieldNorm(doc=544)
         0.07700308 = weight(abstract_txt:performance in 544) [ClassicSimilarity], result of:
           0.07700308 = score(doc=544,freq=1.0), product of:
             0.2125644 = queryWeight, product of:
               2.578946 = boost
               4.6368976 = idf(docFreq=1146, maxDocs=43556)
               0.017775455 = queryNorm
             0.36225763 = fieldWeight in 544, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.6368976 = idf(docFreq=1146, maxDocs=43556)
               0.078125 = fieldNorm(doc=544)
         0.12567317 = weight(abstract_txt:search in 544) [ClassicSimilarity], result of:
           0.12567317 = score(doc=544,freq=4.0), product of:
             0.22007792 = queryWeight, product of:
               3.3877366 = boost
               3.6546526 = idf(docFreq=3062, maxDocs=43556)
               0.017775455 = queryNorm
             0.57103944 = fieldWeight in 544, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               3.6546526 = idf(docFreq=3062, maxDocs=43556)
               0.078125 = fieldNorm(doc=544)
         0.1732695 = weight(abstract_txt:engine in 544) [ClassicSimilarity], result of:
           0.1732695 = score(doc=544,freq=1.0), product of:
             0.401741 = queryWeight, product of:
               4.093921 = boost
               5.5205956 = idf(docFreq=473, maxDocs=43556)
               0.017775455 = queryNorm
             0.43129653 = fieldWeight in 544, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.5205956 = idf(docFreq=473, maxDocs=43556)
               0.078125 = fieldNorm(doc=544)
       0.28 = coord(7/25)
   

4. Shah, C.; Hendahewa, C.; González-Ibáñez, R.: Rain or shine? : forecasting search process performance in exploratory search tasks (2016) 0.17

   0.16913621 = sum of:
     0.16913621 = product of:
       0.6040579 = sum of:
         0.034614224 = weight(abstract_txt:here in 10) [ClassicSimilarity], result of:
           0.034614224 = score(doc=10,freq=1.0), product of:
             0.100358576 = queryWeight, product of:
               1.0230895 = boost
               5.518488 = idf(docFreq=474, maxDocs=43556)
               0.017775455 = queryNorm
             0.3449055 = fieldWeight in 10, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.518488 = idf(docFreq=474, maxDocs=43556)
               0.0625 = fieldNorm(doc=10)
         0.050343856 = weight(abstract_txt:testing in 10) [ClassicSimilarity], result of:
           0.050343856 = score(doc=10,freq=1.0), product of:
             0.12882963 = queryWeight, product of:
               1.1591624 = boost
               6.252457 = idf(docFreq=227, maxDocs=43556)
               0.017775455 = queryNorm
             0.39077857 = fieldWeight in 10, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.252457 = idf(docFreq=227, maxDocs=43556)
               0.0625 = fieldNorm(doc=10)
         0.09376716 = weight(abstract_txt:recommend in 10) [ClassicSimilarity], result of:
           0.09376716 = score(doc=10,freq=1.0), product of:
             0.19502273 = queryWeight, product of:
               1.4261954 = boost
               7.6928186 = idf(docFreq=53, maxDocs=43556)
               0.017775455 = queryNorm
             0.48080117 = fieldWeight in 10, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.6928186 = idf(docFreq=53, maxDocs=43556)
               0.0625 = fieldNorm(doc=10)
         0.08271486 = weight(abstract_txt:evaluating in 10) [ClassicSimilarity], result of:
           0.08271486 = score(doc=10,freq=1.0), product of:
             0.22600451 = queryWeight, product of:
               2.1712506 = boost
               5.8558025 = idf(docFreq=338, maxDocs=43556)
               0.017775455 = queryNorm
             0.36598766 = fieldWeight in 10, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.8558025 = idf(docFreq=338, maxDocs=43556)
               0.0625 = fieldNorm(doc=10)
         0.07695385 = weight(abstract_txt:time in 10) [ClassicSimilarity], result of:
           0.07695385 = score(doc=10,freq=3.0), product of:
             0.17095101 = queryWeight, product of:
               2.3127723 = boost
               4.1583214 = idf(docFreq=1850, maxDocs=43556)
               0.017775455 = queryNorm
             0.45015147 = fieldWeight in 10, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.1583214 = idf(docFreq=1850, maxDocs=43556)
               0.0625 = fieldNorm(doc=10)
         0.10669858 = weight(abstract_txt:performance in 10) [ClassicSimilarity], result of:
           0.10669858 = score(doc=10,freq=3.0), product of:
             0.2125644 = queryWeight, product of:
               2.578946 = boost
               4.6368976 = idf(docFreq=1146, maxDocs=43556)
               0.017775455 = queryNorm
             0.50195885 = fieldWeight in 10, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.6368976 = idf(docFreq=1146, maxDocs=43556)
               0.0625 = fieldNorm(doc=10)
         0.1589654 = weight(abstract_txt:search in 10) [ClassicSimilarity], result of:
           0.1589654 = score(doc=10,freq=10.0), product of:
             0.22007792 = queryWeight, product of:
               3.3877366 = boost
               3.6546526 = idf(docFreq=3062, maxDocs=43556)
               0.017775455 = queryNorm
             0.7223142 = fieldWeight in 10, product of:
               3.1622777 = tf(freq=10.0), with freq of:
                 10.0 = termFreq=10.0
               3.6546526 = idf(docFreq=3062, maxDocs=43556)
               0.0625 = fieldNorm(doc=10)
       0.28 = coord(7/25)
   

5. Bar-Ilan, J.; Levene, M.; Mat-Hassan, M.: Methods for evaluating dynamic changes in search engine rankings : a case study (2006) 0.17

   0.1650218 = sum of:
     0.1650218 = product of:
       0.6875909 = sum of:
         0.0457049 = weight(abstract_txt:period in 1739) [ClassicSimilarity], result of:
           0.0457049 = score(doc=1739,freq=2.0), product of:
             0.10479597 = queryWeight, product of:
               1.0454631 = boost
               5.6391697 = idf(docFreq=420, maxDocs=43556)
               0.017775455 = queryNorm
             0.43613225 = fieldWeight in 1739, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.6391697 = idf(docFreq=420, maxDocs=43556)
               0.0546875 = fieldNorm(doc=1739)
         0.05497849 = weight(abstract_txt:time in 1739) [ClassicSimilarity], result of:
           0.05497849 = score(doc=1739,freq=2.0), product of:
             0.17095101 = queryWeight, product of:
               2.3127723 = boost
               4.1583214 = idf(docFreq=1850, maxDocs=43556)
               0.017775455 = queryNorm
             0.32160378 = fieldWeight in 1739, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.1583214 = idf(docFreq=1850, maxDocs=43556)
               0.0546875 = fieldNorm(doc=1739)
         0.08331631 = weight(abstract_txt:over in 1739) [ClassicSimilarity], result of:
           0.08331631 = score(doc=1739,freq=4.0), product of:
             0.17901379 = queryWeight, product of:
               2.366684 = boost
               4.255254 = idf(docFreq=1679, maxDocs=43556)
               0.017775455 = queryNorm
             0.4654184 = fieldWeight in 1739, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.255254 = idf(docFreq=1679, maxDocs=43556)
               0.0546875 = fieldNorm(doc=1739)
         0.13195683 = weight(abstract_txt:search in 1739) [ClassicSimilarity], result of:
           0.13195683 = score(doc=1739,freq=9.0), product of:
             0.22007792 = queryWeight, product of:
               3.3877366 = boost
               3.6546526 = idf(docFreq=3062, maxDocs=43556)
               0.017775455 = queryNorm
             0.59959143 = fieldWeight in 1739, product of:
               3.0 = tf(freq=9.0), with freq of:
                 9.0 = termFreq=9.0
               3.6546526 = idf(docFreq=3062, maxDocs=43556)
               0.0546875 = fieldNorm(doc=1739)
         0.20010635 = weight(abstract_txt:measures in 1739) [ClassicSimilarity], result of:
           0.20010635 = score(doc=1739,freq=3.0), product of:
             0.3889253 = queryWeight, product of:
               4.0280933 = boost
               5.4318275 = idf(docFreq=517, maxDocs=43556)
               0.017775455 = queryNorm
             0.514511 = fieldWeight in 1739, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.4318275 = idf(docFreq=517, maxDocs=43556)
               0.0546875 = fieldNorm(doc=1739)
         0.17152806 = weight(abstract_txt:engine in 1739) [ClassicSimilarity], result of:
           0.17152806 = score(doc=1739,freq=2.0), product of:
             0.401741 = queryWeight, product of:
               4.093921 = boost
               5.5205956 = idf(docFreq=473, maxDocs=43556)
               0.017775455 = queryNorm
             0.42696178 = fieldWeight in 1739, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.5205956 = idf(docFreq=473, maxDocs=43556)
               0.0546875 = fieldNorm(doc=1739)
       0.24 = coord(6/25)