Document (#34062)

Author

Chang, M.
Poon, C.K.

Title

Efficient phrase querying with common phrase index

Source

Information processing and management. 44(2008) no.2, S.756-769

Year

2008

Abstract

In this paper, we propose a common phrase index as an efficient index structure to support phrase queries in a very large text database. Our structure is an extension of previous index structures for phrases and achieves better query efficiency with modest extra storage cost. Further improvement in efficiency can be attained by implementing our index according to our observation of the dynamic nature of common word set. In experimental evaluation, a common phrase index using 255 common words has an improvement of about 11% and 62% in query time for the overall and large queries (queries of long phrases) respectively over an auxiliary nextword index. Moreover, it has only about 19% extra storage cost. Compared with an inverted index, our improvement is about 72% and 87% for the overall and large queries respectively. We also propose to implement a common phrase index with dynamic update feature. Our experiments show that more improvement in time efficiency can be achieved.

Theme

Retrievalalgorithmen

Similar documents (author)

1. Chang, R.: DBase, relational data models, and MARC records (1992) 4.78

   4.7836475 = sum of:
     4.7836475 = weight(author_txt:chang in 5057) [ClassicSimilarity], result of:
       4.7836475 = fieldWeight in 5057, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         7.653836 = idf(docFreq=56, maxDocs=44218)
         0.625 = fieldNorm(doc=5057)
   

2. Chang, R.: ¬The development of indexing technology (1993) 4.78

   4.7836475 = sum of:
     4.7836475 = weight(author_txt:chang in 7024) [ClassicSimilarity], result of:
       4.7836475 = fieldWeight in 7024, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         7.653836 = idf(docFreq=56, maxDocs=44218)
         0.625 = fieldNorm(doc=7024)
   

3. Chang, R.: Keyword searching and indexing (1993) 4.78

   4.7836475 = sum of:
     4.7836475 = weight(author_txt:chang in 7223) [ClassicSimilarity], result of:
       4.7836475 = fieldWeight in 7223, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         7.653836 = idf(docFreq=56, maxDocs=44218)
         0.625 = fieldNorm(doc=7223)
   

4. Chang, R.H.: To classify or not to classify? : a new look at an old problem (1989) 4.78

   4.7836475 = sum of:
     4.7836475 = weight(author_txt:chang in 2510) [ClassicSimilarity], result of:
       4.7836475 = fieldWeight in 2510, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         7.653836 = idf(docFreq=56, maxDocs=44218)
         0.625 = fieldNorm(doc=2510)
   

5. Chang, S.H.: ¬The current state of Web search engines (1999) 4.78

   4.7836475 = sum of:
     4.7836475 = weight(author_txt:chang in 509) [ClassicSimilarity], result of:
       4.7836475 = fieldWeight in 509, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         7.653836 = idf(docFreq=56, maxDocs=44218)
         0.625 = fieldNorm(doc=509)
   

Similar documents (content)

1. Meldelzon, A.O.; Mihaila, G.A.; Milo, T.: Querying the World Wide Web (1997) 0.24

   0.24416073 = sum of:
     0.24416073 = product of:
       0.6782242 = sum of:
         0.024280144 = weight(abstract_txt:structure in 7860) [ClassicSimilarity], result of:
           0.024280144 = score(doc=7860,freq=1.0), product of:
             0.07131388 = queryWeight, product of:
               1.1361479 = boost
               4.3579993 = idf(docFreq=1538, maxDocs=44218)
               0.014402971 = queryNorm
             0.3404687 = fieldWeight in 7860, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.3579993 = idf(docFreq=1538, maxDocs=44218)
               0.078125 = fieldNorm(doc=7860)
         0.044567455 = weight(abstract_txt:query in 7860) [ClassicSimilarity], result of:
           0.044567455 = score(doc=7860,freq=2.0), product of:
             0.08485454 = queryWeight, product of:
               1.2393254 = boost
               4.7537646 = idf(docFreq=1035, maxDocs=44218)
               0.014402971 = queryNorm
             0.52522177 = fieldWeight in 7860, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.7537646 = idf(docFreq=1035, maxDocs=44218)
               0.078125 = fieldNorm(doc=7860)
         0.012960325 = weight(abstract_txt:with in 7860) [ClassicSimilarity], result of:
           0.012960325 = score(doc=7860,freq=2.0), product of:
             0.04692639 = queryWeight, product of:
               1.303381 = boost
               2.4997334 = idf(docFreq=9868, maxDocs=44218)
               0.014402971 = queryNorm
             0.27618414 = fieldWeight in 7860, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               2.4997334 = idf(docFreq=9868, maxDocs=44218)
               0.078125 = fieldNorm(doc=7860)
         0.040038202 = weight(abstract_txt:propose in 7860) [ClassicSimilarity], result of:
           0.040038202 = score(doc=7860,freq=1.0), product of:
             0.09953816 = queryWeight, product of:
               1.3422785 = boost
               5.1486683 = idf(docFreq=697, maxDocs=44218)
               0.014402971 = queryNorm
             0.4022397 = fieldWeight in 7860, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1486683 = idf(docFreq=697, maxDocs=44218)
               0.078125 = fieldNorm(doc=7860)
         0.026529877 = weight(abstract_txt:about in 7860) [ClassicSimilarity], result of:
           0.026529877 = score(doc=7860,freq=1.0), product of:
             0.086601846 = queryWeight, product of:
               1.5334055 = boost
               3.9211915 = idf(docFreq=2381, maxDocs=44218)
               0.014402971 = queryNorm
             0.30634308 = fieldWeight in 7860, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9211915 = idf(docFreq=2381, maxDocs=44218)
               0.078125 = fieldNorm(doc=7860)
         0.038882826 = weight(abstract_txt:large in 7860) [ClassicSimilarity], result of:
           0.038882826 = score(doc=7860,freq=1.0), product of:
             0.111740045 = queryWeight, product of:
               1.7417983 = boost
               4.454089 = idf(docFreq=1397, maxDocs=44218)
               0.014402971 = queryNorm
             0.34797573 = fieldWeight in 7860, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.454089 = idf(docFreq=1397, maxDocs=44218)
               0.078125 = fieldNorm(doc=7860)
         0.11049096 = weight(abstract_txt:queries in 7860) [ClassicSimilarity], result of:
           0.11049096 = score(doc=7860,freq=2.0), product of:
             0.19583534 = queryWeight, product of:
               2.6626148 = boost
               5.106586 = idf(docFreq=727, maxDocs=44218)
               0.014402971 = queryNorm
             0.5642034 = fieldWeight in 7860, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.106586 = idf(docFreq=727, maxDocs=44218)
               0.078125 = fieldNorm(doc=7860)
         0.097709715 = weight(abstract_txt:common in 7860) [ClassicSimilarity], result of:
           0.097709715 = score(doc=7860,freq=1.0), product of:
             0.2602189 = queryWeight, product of:
               3.759048 = boost
               4.806278 = idf(docFreq=982, maxDocs=44218)
               0.014402971 = queryNorm
             0.3754905 = fieldWeight in 7860, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.806278 = idf(docFreq=982, maxDocs=44218)
               0.078125 = fieldNorm(doc=7860)
         0.28276467 = weight(abstract_txt:index in 7860) [ClassicSimilarity], result of:
           0.28276467 = score(doc=7860,freq=4.0), product of:
             0.3810724 = queryWeight, product of:
               5.5713162 = boost
               4.74895 = idf(docFreq=1040, maxDocs=44218)
               0.014402971 = queryNorm
             0.74202347 = fieldWeight in 7860, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.74895 = idf(docFreq=1040, maxDocs=44218)
               0.078125 = fieldNorm(doc=7860)
       0.36 = coord(9/25)
   

2. Moffat, A.; Zobel, J.: Self-indexing inverted files for fast text retrieval (1996) 0.21

   0.20642161 = sum of:
     0.20642161 = product of:
       0.57339334 = sum of:
         0.10595628 = weight(abstract_txt:inverted in 9) [ClassicSimilarity], result of:
           0.10595628 = score(doc=9,freq=4.0), product of:
             0.1104929 = queryWeight, product of:
               7.6715355 = idf(docFreq=55, maxDocs=44218)
               0.014402971 = queryNorm
             0.95894194 = fieldWeight in 9, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               7.6715355 = idf(docFreq=55, maxDocs=44218)
               0.0625 = fieldNorm(doc=9)
         0.03746149 = weight(abstract_txt:time in 9) [ClassicSimilarity], result of:
           0.03746149 = score(doc=9,freq=5.0), product of:
             0.06461697 = queryWeight, product of:
               1.0814866 = boost
               4.148331 = idf(docFreq=1897, maxDocs=44218)
               0.014402971 = queryNorm
             0.5797469 = fieldWeight in 9, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               4.148331 = idf(docFreq=1897, maxDocs=44218)
               0.0625 = fieldNorm(doc=9)
         0.043667007 = weight(abstract_txt:query in 9) [ClassicSimilarity], result of:
           0.043667007 = score(doc=9,freq=3.0), product of:
             0.08485454 = queryWeight, product of:
               1.2393254 = boost
               4.7537646 = idf(docFreq=1035, maxDocs=44218)
               0.014402971 = queryNorm
             0.5146101 = fieldWeight in 9, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.7537646 = idf(docFreq=1035, maxDocs=44218)
               0.0625 = fieldNorm(doc=9)
         0.007331467 = weight(abstract_txt:with in 9) [ClassicSimilarity], result of:
           0.007331467 = score(doc=9,freq=1.0), product of:
             0.04692639 = queryWeight, product of:
               1.303381 = boost
               2.4997334 = idf(docFreq=9868, maxDocs=44218)
               0.014402971 = queryNorm
             0.15623334 = fieldWeight in 9, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.4997334 = idf(docFreq=9868, maxDocs=44218)
               0.0625 = fieldNorm(doc=9)
         0.06297196 = weight(abstract_txt:cost in 9) [ClassicSimilarity], result of:
           0.06297196 = score(doc=9,freq=2.0), product of:
             0.12398469 = queryWeight, product of:
               1.498069 = boost
               5.746245 = idf(docFreq=383, maxDocs=44218)
               0.014402971 = queryNorm
             0.5079011 = fieldWeight in 9, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.746245 = idf(docFreq=383, maxDocs=44218)
               0.0625 = fieldNorm(doc=9)
         0.046786793 = weight(abstract_txt:storage in 9) [ClassicSimilarity], result of:
           0.046786793 = score(doc=9,freq=1.0), product of:
             0.12814316 = queryWeight, product of:
               1.5229846 = boost
               5.8418155 = idf(docFreq=348, maxDocs=44218)
               0.014402971 = queryNorm
             0.36511347 = fieldWeight in 9, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.8418155 = idf(docFreq=348, maxDocs=44218)
               0.0625 = fieldNorm(doc=9)
         0.031106258 = weight(abstract_txt:large in 9) [ClassicSimilarity], result of:
           0.031106258 = score(doc=9,freq=1.0), product of:
             0.111740045 = queryWeight, product of:
               1.7417983 = boost
               4.454089 = idf(docFreq=1397, maxDocs=44218)
               0.014402971 = queryNorm
             0.27838057 = fieldWeight in 9, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.454089 = idf(docFreq=1397, maxDocs=44218)
               0.0625 = fieldNorm(doc=9)
         0.12500624 = weight(abstract_txt:queries in 9) [ClassicSimilarity], result of:
           0.12500624 = score(doc=9,freq=4.0), product of:
             0.19583534 = queryWeight, product of:
               2.6626148 = boost
               5.106586 = idf(docFreq=727, maxDocs=44218)
               0.014402971 = queryNorm
             0.63832325 = fieldWeight in 9, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.106586 = idf(docFreq=727, maxDocs=44218)
               0.0625 = fieldNorm(doc=9)
         0.11310586 = weight(abstract_txt:index in 9) [ClassicSimilarity], result of:
           0.11310586 = score(doc=9,freq=1.0), product of:
             0.3810724 = queryWeight, product of:
               5.5713162 = boost
               4.74895 = idf(docFreq=1040, maxDocs=44218)
               0.014402971 = queryNorm
             0.29680938 = fieldWeight in 9, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.74895 = idf(docFreq=1040, maxDocs=44218)
               0.0625 = fieldNorm(doc=9)
       0.36 = coord(9/25)
   

3. Vilares, J.; Alonso, M.A.; Vilares, M.: Extraction of complex index terms in non-English IR : a shallow parsing based approach (2008) 0.20

   0.1952312 = sum of:
     0.1952312 = product of:
       0.6972543 = sum of:
         0.01036826 = weight(abstract_txt:with in 2107) [ClassicSimilarity], result of:
           0.01036826 = score(doc=2107,freq=2.0), product of:
             0.04692639 = queryWeight, product of:
               1.303381 = boost
               2.4997334 = idf(docFreq=9868, maxDocs=44218)
               0.014402971 = queryNorm
             0.22094731 = fieldWeight in 2107, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               2.4997334 = idf(docFreq=9868, maxDocs=44218)
               0.0625 = fieldNorm(doc=2107)
         0.03203056 = weight(abstract_txt:propose in 2107) [ClassicSimilarity], result of:
           0.03203056 = score(doc=2107,freq=1.0), product of:
             0.09953816 = queryWeight, product of:
               1.3422785 = boost
               5.1486683 = idf(docFreq=697, maxDocs=44218)
               0.014402971 = queryNorm
             0.32179177 = fieldWeight in 2107, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1486683 = idf(docFreq=697, maxDocs=44218)
               0.0625 = fieldNorm(doc=2107)
         0.046786793 = weight(abstract_txt:storage in 2107) [ClassicSimilarity], result of:
           0.046786793 = score(doc=2107,freq=1.0), product of:
             0.12814316 = queryWeight, product of:
               1.5229846 = boost
               5.8418155 = idf(docFreq=348, maxDocs=44218)
               0.014402971 = queryNorm
             0.36511347 = fieldWeight in 2107, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.8418155 = idf(docFreq=348, maxDocs=44218)
               0.0625 = fieldNorm(doc=2107)
         0.107546054 = weight(abstract_txt:phrases in 2107) [ClassicSimilarity], result of:
           0.107546054 = score(doc=2107,freq=2.0), product of:
             0.17714664 = queryWeight, product of:
               1.7906647 = boost
               6.8685737 = idf(docFreq=124, maxDocs=44218)
               0.014402971 = queryNorm
             0.60710186 = fieldWeight in 2107, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.8685737 = idf(docFreq=124, maxDocs=44218)
               0.0625 = fieldNorm(doc=2107)
         0.088392764 = weight(abstract_txt:queries in 2107) [ClassicSimilarity], result of:
           0.088392764 = score(doc=2107,freq=2.0), product of:
             0.19583534 = queryWeight, product of:
               2.6626148 = boost
               5.106586 = idf(docFreq=727, maxDocs=44218)
               0.014402971 = queryNorm
             0.4513627 = fieldWeight in 2107, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.106586 = idf(docFreq=727, maxDocs=44218)
               0.0625 = fieldNorm(doc=2107)
         0.25217405 = weight(abstract_txt:phrase in 2107) [ClassicSimilarity], result of:
           0.25217405 = score(doc=2107,freq=1.0), product of:
             0.5681381 = queryWeight, product of:
               5.5543776 = boost
               7.1017675 = idf(docFreq=98, maxDocs=44218)
               0.014402971 = queryNorm
             0.44386047 = fieldWeight in 2107, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.1017675 = idf(docFreq=98, maxDocs=44218)
               0.0625 = fieldNorm(doc=2107)
         0.15995583 = weight(abstract_txt:index in 2107) [ClassicSimilarity], result of:
           0.15995583 = score(doc=2107,freq=2.0), product of:
             0.3810724 = queryWeight, product of:
               5.5713162 = boost
               4.74895 = idf(docFreq=1040, maxDocs=44218)
               0.014402971 = queryNorm
             0.41975182 = fieldWeight in 2107, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.74895 = idf(docFreq=1040, maxDocs=44218)
               0.0625 = fieldNorm(doc=2107)
       0.28 = coord(7/25)
   

4. Losee, R.M.: Term dependence : a basis for Luhn and Zipf models (2001) 0.18

   0.1835782 = sum of:
     0.1835782 = product of:
       0.76490915 = sum of:
         0.009164333 = weight(abstract_txt:with in 6976) [ClassicSimilarity], result of:
           0.009164333 = score(doc=6976,freq=1.0), product of:
             0.04692639 = queryWeight, product of:
               1.303381 = boost
               2.4997334 = idf(docFreq=9868, maxDocs=44218)
               0.014402971 = queryNorm
             0.19529167 = fieldWeight in 6976, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.4997334 = idf(docFreq=9868, maxDocs=44218)
               0.078125 = fieldNorm(doc=6976)
         0.026529877 = weight(abstract_txt:about in 6976) [ClassicSimilarity], result of:
           0.026529877 = score(doc=6976,freq=1.0), product of:
             0.086601846 = queryWeight, product of:
               1.5334055 = boost
               3.9211915 = idf(docFreq=2381, maxDocs=44218)
               0.014402971 = queryNorm
             0.30634308 = fieldWeight in 6976, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9211915 = idf(docFreq=2381, maxDocs=44218)
               0.078125 = fieldNorm(doc=6976)
         0.13443257 = weight(abstract_txt:phrases in 6976) [ClassicSimilarity], result of:
           0.13443257 = score(doc=6976,freq=2.0), product of:
             0.17714664 = queryWeight, product of:
               1.7906647 = boost
               6.8685737 = idf(docFreq=124, maxDocs=44218)
               0.014402971 = queryNorm
             0.75887734 = fieldWeight in 6976, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.8685737 = idf(docFreq=124, maxDocs=44218)
               0.078125 = fieldNorm(doc=6976)
         0.1381824 = weight(abstract_txt:common in 6976) [ClassicSimilarity], result of:
           0.1381824 = score(doc=6976,freq=2.0), product of:
             0.2602189 = queryWeight, product of:
               3.759048 = boost
               4.806278 = idf(docFreq=982, maxDocs=44218)
               0.014402971 = queryNorm
             0.53102374 = fieldWeight in 6976, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.806278 = idf(docFreq=982, maxDocs=44218)
               0.078125 = fieldNorm(doc=6976)
         0.31521758 = weight(abstract_txt:phrase in 6976) [ClassicSimilarity], result of:
           0.31521758 = score(doc=6976,freq=1.0), product of:
             0.5681381 = queryWeight, product of:
               5.5543776 = boost
               7.1017675 = idf(docFreq=98, maxDocs=44218)
               0.014402971 = queryNorm
             0.5548256 = fieldWeight in 6976, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.1017675 = idf(docFreq=98, maxDocs=44218)
               0.078125 = fieldNorm(doc=6976)
         0.14138234 = weight(abstract_txt:index in 6976) [ClassicSimilarity], result of:
           0.14138234 = score(doc=6976,freq=1.0), product of:
             0.3810724 = queryWeight, product of:
               5.5713162 = boost
               4.74895 = idf(docFreq=1040, maxDocs=44218)
               0.014402971 = queryNorm
             0.37101173 = fieldWeight in 6976, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.74895 = idf(docFreq=1040, maxDocs=44218)
               0.078125 = fieldNorm(doc=6976)
       0.24 = coord(6/25)
   

5. Wang, H.; Liu, Q.; Penin, T.; Fu, L.; Zhang, L.; Tran, T.; Yu, Y.; Pan, Y.: Semplore: a scalable IR approach to search the Web of Data (2009) 0.17

   0.17329757 = sum of:
     0.17329757 = product of:
       0.5415549 = sum of:
         0.066222675 = weight(abstract_txt:inverted in 1638) [ClassicSimilarity], result of:
           0.066222675 = score(doc=1638,freq=1.0), product of:
             0.1104929 = queryWeight, product of:
               7.6715355 = idf(docFreq=55, maxDocs=44218)
               0.014402971 = queryNorm
             0.5993387 = fieldWeight in 1638, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.6715355 = idf(docFreq=55, maxDocs=44218)
               0.078125 = fieldNorm(doc=1638)
         0.024280144 = weight(abstract_txt:structure in 1638) [ClassicSimilarity], result of:
           0.024280144 = score(doc=1638,freq=1.0), product of:
             0.07131388 = queryWeight, product of:
               1.1361479 = boost
               4.3579993 = idf(docFreq=1538, maxDocs=44218)
               0.014402971 = queryNorm
             0.3404687 = fieldWeight in 1638, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.3579993 = idf(docFreq=1538, maxDocs=44218)
               0.078125 = fieldNorm(doc=1638)
         0.044567455 = weight(abstract_txt:query in 1638) [ClassicSimilarity], result of:
           0.044567455 = score(doc=1638,freq=2.0), product of:
             0.08485454 = queryWeight, product of:
               1.2393254 = boost
               4.7537646 = idf(docFreq=1035, maxDocs=44218)
               0.014402971 = queryNorm
             0.52522177 = fieldWeight in 1638, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.7537646 = idf(docFreq=1035, maxDocs=44218)
               0.078125 = fieldNorm(doc=1638)
         0.009164333 = weight(abstract_txt:with in 1638) [ClassicSimilarity], result of:
           0.009164333 = score(doc=1638,freq=1.0), product of:
             0.04692639 = queryWeight, product of:
               1.303381 = boost
               2.4997334 = idf(docFreq=9868, maxDocs=44218)
               0.014402971 = queryNorm
             0.19529167 = fieldWeight in 1638, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.4997334 = idf(docFreq=9868, maxDocs=44218)
               0.078125 = fieldNorm(doc=1638)
         0.080363795 = weight(abstract_txt:efficient in 1638) [ClassicSimilarity], result of:
           0.080363795 = score(doc=1638,freq=2.0), product of:
             0.12571011 = queryWeight, product of:
               1.508457 = boost
               5.7860904 = idf(docFreq=368, maxDocs=44218)
               0.014402971 = queryNorm
             0.63927865 = fieldWeight in 1638, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.7860904 = idf(docFreq=368, maxDocs=44218)
               0.078125 = fieldNorm(doc=1638)
         0.038882826 = weight(abstract_txt:large in 1638) [ClassicSimilarity], result of:
           0.038882826 = score(doc=1638,freq=1.0), product of:
             0.111740045 = queryWeight, product of:
               1.7417983 = boost
               4.454089 = idf(docFreq=1397, maxDocs=44218)
               0.014402971 = queryNorm
             0.34797573 = fieldWeight in 1638, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.454089 = idf(docFreq=1397, maxDocs=44218)
               0.078125 = fieldNorm(doc=1638)
         0.078128904 = weight(abstract_txt:queries in 1638) [ClassicSimilarity], result of:
           0.078128904 = score(doc=1638,freq=1.0), product of:
             0.19583534 = queryWeight, product of:
               2.6626148 = boost
               5.106586 = idf(docFreq=727, maxDocs=44218)
               0.014402971 = queryNorm
             0.39895204 = fieldWeight in 1638, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.106586 = idf(docFreq=727, maxDocs=44218)
               0.078125 = fieldNorm(doc=1638)
         0.1999448 = weight(abstract_txt:index in 1638) [ClassicSimilarity], result of:
           0.1999448 = score(doc=1638,freq=2.0), product of:
             0.3810724 = queryWeight, product of:
               5.5713162 = boost
               4.74895 = idf(docFreq=1040, maxDocs=44218)
               0.014402971 = queryNorm
             0.5246898 = fieldWeight in 1638, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.74895 = idf(docFreq=1040, maxDocs=44218)
               0.078125 = fieldNorm(doc=1638)
       0.32 = coord(8/25)