Document (#18762)

Author

Smith, M.P.
Smith, M.

Title

¬The use of genetic programming to build Boolean queries for text retrieval through relevance feedback

Source

Journal of information science. 23(1997) no.6, S.423-431.

Year

1997

Abstract

Reports preliminary work on the use of evolutionary computing techniques to improve Boolean information retrieval system performance through relevance feedback, such as neural networks and genetic algorithms. One specific form of genetic algorithm technique was used: that of genetic programming. Terms from relevant documents are used to create randomly Boolean queries. Boolean queires are thought of as genetic programming organisms and, as such, are used for breeding to produce new organisms. Organisms which perform well, in terms of how good they are at retrieval, are given a better chance of being selected for breeding, with the result being that the overall fitness of the organisms improve to some extent. The aim is to develop the best Boolean query for an information need, given a small corpus of test documents, and then to use that query on the full collection to retrieve yet more relevant documents

Similar documents (author)

1. Smith, E.H.: Enhancing subject accessibiliy to the online catalog (1991) 4.03

   4.034027 = sum of:
     4.034027 = weight(author_txt:smith in 1068) [ClassicSimilarity], result of:
       4.034027 = fieldWeight in 1068, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         6.4544435 = idf(docFreq=189, maxDocs=44421)
         0.625 = fieldNorm(doc=1068)
   

2. Smith, L.C.: UNISIST revisited: campatibility in the context of collaboratories (1992) 4.03

   4.034027 = sum of:
     4.034027 = weight(author_txt:smith in 2112) [ClassicSimilarity], result of:
       4.034027 = fieldWeight in 2112, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         6.4544435 = idf(docFreq=189, maxDocs=44421)
         0.625 = fieldNorm(doc=2112)
   

3. Smith, M.M.: Knowledge management : a guide to resources on the Internet (2004) 4.03

   4.034027 = sum of:
     4.034027 = weight(author_txt:smith in 2804) [ClassicSimilarity], result of:
       4.034027 = fieldWeight in 2804, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         6.4544435 = idf(docFreq=189, maxDocs=44421)
         0.625 = fieldNorm(doc=2804)
   

4. Smith, L.C.: Citation analysis (1981) 4.03

   4.034027 = sum of:
     4.034027 = weight(author_txt:smith in 2832) [ClassicSimilarity], result of:
       4.034027 = fieldWeight in 2832, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         6.4544435 = idf(docFreq=189, maxDocs=44421)
         0.625 = fieldNorm(doc=2832)
   

5. Smith, I.W.: Towards an evaluation of CD-ROM products in the library user services environment (1989) 4.03

   4.034027 = sum of:
     4.034027 = weight(author_txt:smith in 4019) [ClassicSimilarity], result of:
       4.034027 = fieldWeight in 4019, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         6.4544435 = idf(docFreq=189, maxDocs=44421)
         0.625 = fieldNorm(doc=4019)
   

Similar documents (content)

1. Petry, F.E.; Buckles, B.P.; Prabhu, D.: Fuzzy information retrieval using genetic algorithms and relevance feedback (1993) 0.77

   0.77495384 = sum of:
     0.77495384 = product of:
       1.6144872 = sum of:
         0.017931834 = weight(abstract_txt:through in 7961) [ClassicSimilarity], result of:
           0.017931834 = score(doc=7961,freq=1.0), product of:
             0.057384517 = queryWeight, product of:
               1.1542175 = boost
               3.9998152 = idf(docFreq=2211, maxDocs=44421)
               0.012429886 = queryNorm
             0.31248558 = fieldWeight in 7961, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9998152 = idf(docFreq=2211, maxDocs=44421)
               0.078125 = fieldNorm(doc=7961)
         0.018528726 = weight(abstract_txt:terms in 7961) [ClassicSimilarity], result of:
           0.018528726 = score(doc=7961,freq=1.0), product of:
             0.05865098 = queryWeight, product of:
               1.1668847 = boost
               4.043712 = idf(docFreq=2116, maxDocs=44421)
               0.012429886 = queryNorm
             0.31591502 = fieldWeight in 7961, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.043712 = idf(docFreq=2116, maxDocs=44421)
               0.078125 = fieldNorm(doc=7961)
         0.14048271 = weight(abstract_txt:fitness in 7961) [ClassicSimilarity], result of:
           0.14048271 = score(doc=7961,freq=3.0), product of:
             0.12456894 = queryWeight, product of:
               1.2024864 = boost
               8.334172 = idf(docFreq=28, maxDocs=44421)
               0.012429886 = queryNorm
             1.1277508 = fieldWeight in 7961, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               8.334172 = idf(docFreq=28, maxDocs=44421)
               0.078125 = fieldNorm(doc=7961)
         0.060234755 = weight(abstract_txt:query in 7961) [ClassicSimilarity], result of:
           0.060234755 = score(doc=7961,freq=4.0), product of:
             0.08108173 = queryWeight, product of:
               1.3719927 = boost
               4.754492 = idf(docFreq=1039, maxDocs=44421)
               0.012429886 = queryNorm
             0.74288934 = fieldWeight in 7961, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.754492 = idf(docFreq=1039, maxDocs=44421)
               0.078125 = fieldNorm(doc=7961)
         0.06713545 = weight(abstract_txt:relevance in 7961) [ClassicSimilarity], result of:
           0.06713545 = score(doc=7961,freq=4.0), product of:
             0.08716181 = queryWeight, product of:
               1.4225037 = boost
               4.929532 = idf(docFreq=872, maxDocs=44421)
               0.012429886 = queryNorm
             0.77023935 = fieldWeight in 7961, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.929532 = idf(docFreq=872, maxDocs=44421)
               0.078125 = fieldNorm(doc=7961)
         0.048281863 = weight(abstract_txt:improve in 7961) [ClassicSimilarity], result of:
           0.048281863 = score(doc=7961,freq=2.0), product of:
             0.0881504 = queryWeight, product of:
               1.430548 = boost
               4.9574084 = idf(docFreq=848, maxDocs=44421)
               0.012429886 = queryNorm
             0.54772145 = fieldWeight in 7961, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.9574084 = idf(docFreq=848, maxDocs=44421)
               0.078125 = fieldNorm(doc=7961)
         0.024976863 = weight(abstract_txt:retrieval in 7961) [ClassicSimilarity], result of:
           0.024976863 = score(doc=7961,freq=2.0), product of:
             0.06502654 = queryWeight, product of:
               1.5048084 = boost
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.012429886 = queryNorm
             0.3841026 = fieldWeight in 7961, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.078125 = fieldNorm(doc=7961)
         0.083033085 = weight(abstract_txt:feedback in 7961) [ClassicSimilarity], result of:
           0.083033085 = score(doc=7961,freq=2.0), product of:
             0.12653258 = queryWeight, product of:
               1.7139237 = boost
               5.9394164 = idf(docFreq=317, maxDocs=44421)
               0.012429886 = queryNorm
             0.656219 = fieldWeight in 7961, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.9394164 = idf(docFreq=317, maxDocs=44421)
               0.078125 = fieldNorm(doc=7961)
         0.041672815 = weight(abstract_txt:documents in 7961) [ClassicSimilarity], result of:
           0.041672815 = score(doc=7961,freq=2.0), product of:
             0.091474615 = queryWeight, product of:
               1.7847863 = boost
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.012429886 = queryNorm
             0.455567 = fieldWeight in 7961, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.078125 = fieldNorm(doc=7961)
         0.23158322 = weight(abstract_txt:programming in 7961) [ClassicSimilarity], result of:
           0.23158322 = score(doc=7961,freq=3.0), product of:
             0.25071076 = queryWeight, product of:
               2.9547613 = boost
               6.82627 = idf(docFreq=130, maxDocs=44421)
               0.012429886 = queryNorm
             0.92370677 = fieldWeight in 7961, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               6.82627 = idf(docFreq=130, maxDocs=44421)
               0.078125 = fieldNorm(doc=7961)
         0.24242958 = weight(abstract_txt:boolean in 7961) [ClassicSimilarity], result of:
           0.24242958 = score(doc=7961,freq=2.0), product of:
             0.35081005 = queryWeight, product of:
               4.512283 = boost
               6.25473 = idf(docFreq=231, maxDocs=44421)
               0.012429886 = queryNorm
             0.69105655 = fieldWeight in 7961, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.25473 = idf(docFreq=231, maxDocs=44421)
               0.078125 = fieldNorm(doc=7961)
         0.6381962 = weight(abstract_txt:genetic in 7961) [ClassicSimilarity], result of:
           0.6381962 = score(doc=7961,freq=4.0), product of:
             0.53085315 = queryWeight, product of:
               5.550697 = boost
               7.694134 = idf(docFreq=54, maxDocs=44421)
               0.012429886 = queryNorm
             1.2022085 = fieldWeight in 7961, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               7.694134 = idf(docFreq=54, maxDocs=44421)
               0.078125 = fieldNorm(doc=7961)
       0.48 = coord(12/25)
   

2. Fan, W.; Fox, E.A.; Pathak, P.; Wu, H.: ¬The effects of fitness functions an genetic programming-based ranking discovery for Web search (2004) 0.31

   0.3071651 = sum of:
     0.3071651 = product of:
       1.0970181 = sum of:
         0.007862649 = weight(abstract_txt:that in 3239) [ClassicSimilarity], result of:
           0.007862649 = score(doc=3239,freq=2.0), product of:
             0.030091552 = queryWeight, product of:
               1.0236659 = boost
               2.3649352 = idf(docFreq=11344, maxDocs=44421)
               0.012429886 = queryNorm
             0.2612909 = fieldWeight in 3239, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               2.3649352 = idf(docFreq=11344, maxDocs=44421)
               0.078125 = fieldNorm(doc=3239)
         0.077700466 = weight(abstract_txt:evolutionary in 3239) [ClassicSimilarity], result of:
           0.077700466 = score(doc=3239,freq=2.0), product of:
             0.0960817 = queryWeight, product of:
               1.0560771 = boost
               7.319441 = idf(docFreq=79, maxDocs=44421)
               0.012429886 = queryNorm
             0.8086916 = fieldWeight in 3239, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.319441 = idf(docFreq=79, maxDocs=44421)
               0.078125 = fieldNorm(doc=3239)
         0.19867258 = weight(abstract_txt:fitness in 3239) [ClassicSimilarity], result of:
           0.19867258 = score(doc=3239,freq=6.0), product of:
             0.12456894 = queryWeight, product of:
               1.2024864 = boost
               8.334172 = idf(docFreq=28, maxDocs=44421)
               0.012429886 = queryNorm
             1.5948806 = fieldWeight in 3239, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               8.334172 = idf(docFreq=28, maxDocs=44421)
               0.078125 = fieldNorm(doc=3239)
         0.015904786 = weight(abstract_txt:used in 3239) [ClassicSimilarity], result of:
           0.015904786 = score(doc=3239,freq=1.0), product of:
             0.060640194 = queryWeight, product of:
               1.4531692 = boost
               3.3572001 = idf(docFreq=4205, maxDocs=44421)
               0.012429886 = queryNorm
             0.26228127 = fieldWeight in 3239, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.3572001 = idf(docFreq=4205, maxDocs=44421)
               0.078125 = fieldNorm(doc=3239)
         0.024976863 = weight(abstract_txt:retrieval in 3239) [ClassicSimilarity], result of:
           0.024976863 = score(doc=3239,freq=2.0), product of:
             0.06502654 = queryWeight, product of:
               1.5048084 = boost
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.012429886 = queryNorm
             0.3841026 = fieldWeight in 3239, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.078125 = fieldNorm(doc=3239)
         0.13370463 = weight(abstract_txt:programming in 3239) [ClassicSimilarity], result of:
           0.13370463 = score(doc=3239,freq=1.0), product of:
             0.25071076 = queryWeight, product of:
               2.9547613 = boost
               6.82627 = idf(docFreq=130, maxDocs=44421)
               0.012429886 = queryNorm
             0.53330237 = fieldWeight in 3239, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.82627 = idf(docFreq=130, maxDocs=44421)
               0.078125 = fieldNorm(doc=3239)
         0.6381962 = weight(abstract_txt:genetic in 3239) [ClassicSimilarity], result of:
           0.6381962 = score(doc=3239,freq=4.0), product of:
             0.53085315 = queryWeight, product of:
               5.550697 = boost
               7.694134 = idf(docFreq=54, maxDocs=44421)
               0.012429886 = queryNorm
             1.2022085 = fieldWeight in 3239, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               7.694134 = idf(docFreq=54, maxDocs=44421)
               0.078125 = fieldNorm(doc=3239)
       0.28 = coord(7/25)
   

3. Lopez-Pujalte, C.; Guerrero Bote, V.P.; Moya-Anegón, F. de: Evaluation of the application of genetic algorithms to relevance feedback (2003) 0.28

   0.2791898 = sum of:
     0.2791898 = product of:
       0.8724681 = sum of:
         0.009629738 = weight(abstract_txt:that in 3756) [ClassicSimilarity], result of:
           0.009629738 = score(doc=3756,freq=3.0), product of:
             0.030091552 = queryWeight, product of:
               1.0236659 = boost
               2.3649352 = idf(docFreq=11344, maxDocs=44421)
               0.012429886 = queryNorm
             0.32001466 = fieldWeight in 3756, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               2.3649352 = idf(docFreq=11344, maxDocs=44421)
               0.078125 = fieldNorm(doc=3756)
         0.081107736 = weight(abstract_txt:fitness in 3756) [ClassicSimilarity], result of:
           0.081107736 = score(doc=3756,freq=1.0), product of:
             0.12456894 = queryWeight, product of:
               1.2024864 = boost
               8.334172 = idf(docFreq=28, maxDocs=44421)
               0.012429886 = queryNorm
             0.6511072 = fieldWeight in 3756, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.334172 = idf(docFreq=28, maxDocs=44421)
               0.078125 = fieldNorm(doc=3756)
         0.029047146 = weight(abstract_txt:given in 3756) [ClassicSimilarity], result of:
           0.029047146 = score(doc=3756,freq=1.0), product of:
             0.07914933 = queryWeight, product of:
               1.3555449 = boost
               4.6974936 = idf(docFreq=1100, maxDocs=44421)
               0.012429886 = queryNorm
             0.3669917 = fieldWeight in 3756, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.6974936 = idf(docFreq=1100, maxDocs=44421)
               0.078125 = fieldNorm(doc=3756)
         0.058141008 = weight(abstract_txt:relevance in 3756) [ClassicSimilarity], result of:
           0.058141008 = score(doc=3756,freq=3.0), product of:
             0.08716181 = queryWeight, product of:
               1.4225037 = boost
               4.929532 = idf(docFreq=872, maxDocs=44421)
               0.012429886 = queryNorm
             0.66704684 = fieldWeight in 3756, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.929532 = idf(docFreq=872, maxDocs=44421)
               0.078125 = fieldNorm(doc=3756)
         0.022492766 = weight(abstract_txt:used in 3756) [ClassicSimilarity], result of:
           0.022492766 = score(doc=3756,freq=2.0), product of:
             0.060640194 = queryWeight, product of:
               1.4531692 = boost
               3.3572001 = idf(docFreq=4205, maxDocs=44421)
               0.012429886 = queryNorm
             0.37092173 = fieldWeight in 3756, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.3572001 = idf(docFreq=4205, maxDocs=44421)
               0.078125 = fieldNorm(doc=3756)
         0.017661309 = weight(abstract_txt:retrieval in 3756) [ClassicSimilarity], result of:
           0.017661309 = score(doc=3756,freq=1.0), product of:
             0.06502654 = queryWeight, product of:
               1.5048084 = boost
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.012429886 = queryNorm
             0.27160156 = fieldWeight in 3756, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.078125 = fieldNorm(doc=3756)
         0.10169434 = weight(abstract_txt:feedback in 3756) [ClassicSimilarity], result of:
           0.10169434 = score(doc=3756,freq=3.0), product of:
             0.12653258 = queryWeight, product of:
               1.7139237 = boost
               5.9394164 = idf(docFreq=317, maxDocs=44421)
               0.012429886 = queryNorm
             0.8037008 = fieldWeight in 3756, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.9394164 = idf(docFreq=317, maxDocs=44421)
               0.078125 = fieldNorm(doc=3756)
         0.5526941 = weight(abstract_txt:genetic in 3756) [ClassicSimilarity], result of:
           0.5526941 = score(doc=3756,freq=3.0), product of:
             0.53085315 = queryWeight, product of:
               5.550697 = boost
               7.694134 = idf(docFreq=54, maxDocs=44421)
               0.012429886 = queryNorm
             1.0411431 = fieldWeight in 3756, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               7.694134 = idf(docFreq=54, maxDocs=44421)
               0.078125 = fieldNorm(doc=3756)
       0.32 = coord(8/25)
   

4. López-Pujalte, C.; Guerrero-Bote, V.P.; Moya-Anegón, F. de: Order-based fitness functions for genetic algorithms applied to relevance feedback (2003) 0.25

   0.2546157 = sum of:
     0.2546157 = product of:
       0.57867205 = sum of:
         0.012970108 = weight(abstract_txt:terms in 154) [ClassicSimilarity], result of:
           0.012970108 = score(doc=154,freq=1.0), product of:
             0.05865098 = queryWeight, product of:
               1.1668847 = boost
               4.043712 = idf(docFreq=2116, maxDocs=44421)
               0.012429886 = queryNorm
             0.2211405 = fieldWeight in 154, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.043712 = idf(docFreq=2116, maxDocs=44421)
               0.0546875 = fieldNorm(doc=154)
         0.098337896 = weight(abstract_txt:fitness in 154) [ClassicSimilarity], result of:
           0.098337896 = score(doc=154,freq=3.0), product of:
             0.12456894 = queryWeight, product of:
               1.2024864 = boost
               8.334172 = idf(docFreq=28, maxDocs=44421)
               0.012429886 = queryNorm
             0.7894255 = fieldWeight in 154, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               8.334172 = idf(docFreq=28, maxDocs=44421)
               0.0546875 = fieldNorm(doc=154)
         0.03893553 = weight(abstract_txt:relevant in 154) [ClassicSimilarity], result of:
           0.03893553 = score(doc=154,freq=4.0), product of:
             0.07688772 = queryWeight, product of:
               1.3360379 = boost
               4.6298943 = idf(docFreq=1177, maxDocs=44421)
               0.012429886 = queryNorm
             0.5063947 = fieldWeight in 154, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.6298943 = idf(docFreq=1177, maxDocs=44421)
               0.0546875 = fieldNorm(doc=154)
         0.021082163 = weight(abstract_txt:query in 154) [ClassicSimilarity], result of:
           0.021082163 = score(doc=154,freq=1.0), product of:
             0.08108173 = queryWeight, product of:
               1.3719927 = boost
               4.754492 = idf(docFreq=1039, maxDocs=44421)
               0.012429886 = queryNorm
             0.26001126 = fieldWeight in 154, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.754492 = idf(docFreq=1039, maxDocs=44421)
               0.0546875 = fieldNorm(doc=154)
         0.02349741 = weight(abstract_txt:relevance in 154) [ClassicSimilarity], result of:
           0.02349741 = score(doc=154,freq=1.0), product of:
             0.08716181 = queryWeight, product of:
               1.4225037 = boost
               4.929532 = idf(docFreq=872, maxDocs=44421)
               0.012429886 = queryNorm
             0.2695838 = fieldWeight in 154, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.929532 = idf(docFreq=872, maxDocs=44421)
               0.0546875 = fieldNorm(doc=154)
         0.015744936 = weight(abstract_txt:used in 154) [ClassicSimilarity], result of:
           0.015744936 = score(doc=154,freq=2.0), product of:
             0.060640194 = queryWeight, product of:
               1.4531692 = boost
               3.3572001 = idf(docFreq=4205, maxDocs=44421)
               0.012429886 = queryNorm
             0.2596452 = fieldWeight in 154, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.3572001 = idf(docFreq=4205, maxDocs=44421)
               0.0546875 = fieldNorm(doc=154)
         0.026044825 = weight(abstract_txt:queries in 154) [ClassicSimilarity], result of:
           0.026044825 = score(doc=154,freq=1.0), product of:
             0.093352765 = queryWeight, product of:
               1.4721562 = boost
               5.1015973 = idf(docFreq=734, maxDocs=44421)
               0.012429886 = queryNorm
             0.2789936 = fieldWeight in 154, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1015973 = idf(docFreq=734, maxDocs=44421)
               0.0546875 = fieldNorm(doc=154)
         0.012362917 = weight(abstract_txt:retrieval in 154) [ClassicSimilarity], result of:
           0.012362917 = score(doc=154,freq=1.0), product of:
             0.06502654 = queryWeight, product of:
               1.5048084 = boost
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.012429886 = queryNorm
             0.1901211 = fieldWeight in 154, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.0546875 = fieldNorm(doc=154)
         0.041099284 = weight(abstract_txt:feedback in 154) [ClassicSimilarity], result of:
           0.041099284 = score(doc=154,freq=1.0), product of:
             0.12653258 = queryWeight, product of:
               1.7139237 = boost
               5.9394164 = idf(docFreq=317, maxDocs=44421)
               0.012429886 = queryNorm
             0.32481185 = fieldWeight in 154, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.9394164 = idf(docFreq=317, maxDocs=44421)
               0.0546875 = fieldNorm(doc=154)
         0.065228276 = weight(abstract_txt:documents in 154) [ClassicSimilarity], result of:
           0.065228276 = score(doc=154,freq=10.0), product of:
             0.091474615 = queryWeight, product of:
               1.7847863 = boost
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.012429886 = queryNorm
             0.71307516 = fieldWeight in 154, product of:
               3.1622777 = tf(freq=10.0), with freq of:
                 10.0 = termFreq=10.0
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.0546875 = fieldNorm(doc=154)
         0.22336866 = weight(abstract_txt:genetic in 154) [ClassicSimilarity], result of:
           0.22336866 = score(doc=154,freq=1.0), product of:
             0.53085315 = queryWeight, product of:
               5.550697 = boost
               7.694134 = idf(docFreq=54, maxDocs=44421)
               0.012429886 = queryNorm
             0.42077297 = fieldWeight in 154, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.694134 = idf(docFreq=54, maxDocs=44421)
               0.0546875 = fieldNorm(doc=154)
       0.44 = coord(11/25)
   

5. Smith, M.; Smith, M.P.; Wade, S.J.: Applying genetic programming to the problem of term weight algorithms (1995) 0.24

   0.24009664 = sum of:
     0.24009664 = product of:
       1.2004832 = sum of:
         0.053708367 = weight(abstract_txt:relevance in 5871) [ClassicSimilarity], result of:
           0.053708367 = score(doc=5871,freq=1.0), product of:
             0.08716181 = queryWeight, product of:
               1.4225037 = boost
               4.929532 = idf(docFreq=872, maxDocs=44421)
               0.012429886 = queryNorm
             0.6161915 = fieldWeight in 5871, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.929532 = idf(docFreq=872, maxDocs=44421)
               0.125 = fieldNorm(doc=5871)
         0.028258095 = weight(abstract_txt:retrieval in 5871) [ClassicSimilarity], result of:
           0.028258095 = score(doc=5871,freq=1.0), product of:
             0.06502654 = queryWeight, product of:
               1.5048084 = boost
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.012429886 = queryNorm
             0.4345625 = fieldWeight in 5871, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.125 = fieldNorm(doc=5871)
         0.09394121 = weight(abstract_txt:feedback in 5871) [ClassicSimilarity], result of:
           0.09394121 = score(doc=5871,freq=1.0), product of:
             0.12653258 = queryWeight, product of:
               1.7139237 = boost
               5.9394164 = idf(docFreq=317, maxDocs=44421)
               0.012429886 = queryNorm
             0.74242705 = fieldWeight in 5871, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.9394164 = idf(docFreq=317, maxDocs=44421)
               0.125 = fieldNorm(doc=5871)
         0.30253905 = weight(abstract_txt:programming in 5871) [ClassicSimilarity], result of:
           0.30253905 = score(doc=5871,freq=2.0), product of:
             0.25071076 = queryWeight, product of:
               2.9547613 = boost
               6.82627 = idf(docFreq=130, maxDocs=44421)
               0.012429886 = queryNorm
             1.2067255 = fieldWeight in 5871, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.82627 = idf(docFreq=130, maxDocs=44421)
               0.125 = fieldNorm(doc=5871)
         0.7220365 = weight(abstract_txt:genetic in 5871) [ClassicSimilarity], result of:
           0.7220365 = score(doc=5871,freq=2.0), product of:
             0.53085315 = queryWeight, product of:
               5.550697 = boost
               7.694134 = idf(docFreq=54, maxDocs=44421)
               0.012429886 = queryNorm
             1.3601435 = fieldWeight in 5871, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.694134 = idf(docFreq=54, maxDocs=44421)
               0.125 = fieldNorm(doc=5871)
       0.2 = coord(5/25)