Search (3 results, page 1 of 1)

Robertson, S.E.; Walker, S.; Hancock-Beaulieu, M.M.: Large test collection experiments of an operational, interactive system : OKAPI at TREC (1995) 0.00

0.0017471868 = product of:
  0.010483121 = sum of:
    0.010483121 = weight(_text_:information in 6964) [ClassicSimilarity], result of:
      0.010483121 = score(doc=6964,freq=2.0), product of:
        0.0772133 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.043984205 = queryNorm
        0.13576832 = fieldWeight in 6964, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.0546875 = fieldNorm(doc=6964)
  0.16666667 = coord(1/6)

Source: Information processing and management. 31(1995) no.3, S.345-360

Robertson, S.E.: OKAPI at TREC-3 (1995) 0.00
```
0.0017471868 = product of:
  0.010483121 = sum of:
    0.010483121 = weight(_text_:information in 5694) [ClassicSimilarity], result of:
      0.010483121 = score(doc=5694,freq=2.0), product of:
        0.0772133 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.043984205 = queryNorm
        0.13576832 = fieldWeight in 5694, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.0546875 = fieldNorm(doc=5694)
  0.16666667 = coord(1/6)
```
Abstract

Reports text information retrieval experiments performed as part of the 3 rd round of Text Retrieval Conferences (TREC) using the Okapi online catalogue system at City University, UK. The emphasis in TREC-3 was: further refinement of term weighting functions; an investigation of run time passage determination and searching; expansion of ad hoc queries by terms extracted from the top documents retrieved by a trial search; new methods for choosing query expansion terms after relevance feedback, now split into methods of ranking terms prior to selection and subsequent selection procedures; and the development of a user interface procedure within the new TREC interactive search framework

Vechtomova, O.; Robertson, S.E.: ¬A domain-independent approach to finding related entities (2012) 0.00

0.0014975886 = product of:
  0.0089855315 = sum of:
    0.0089855315 = weight(_text_:information in 2733) [ClassicSimilarity], result of:
      0.0089855315 = score(doc=2733,freq=2.0), product of:
        0.0772133 = queryWeight, product of:
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.043984205 = queryNorm
        0.116372846 = fieldWeight in 2733, product of:
          1.4142135 = tf(freq=2.0), with freq of:
            2.0 = termFreq=2.0
          1.7554779 = idf(docFreq=20772, maxDocs=44218)
          0.046875 = fieldNorm(doc=2733)
  0.16666667 = coord(1/6)

Source: Information processing and management. 48(2012) no.4, S.654-670

Search (3 results, page 1 of 1)

Authors

Years

Types

Themes