Search (1 results, page 1 of 1)

6.4605067E-4 = product of:
  0.00969076 = sum of:
    0.006901989 = weight(_text_:in in 2731) [ClassicSimilarity], result of:
      0.006901989 = score(doc=2731,freq=10.0), product of:
        0.029340398 = queryWeight, product of:
          1.3602545 = idf(docFreq=30841, maxDocs=44218)
          0.021569785 = queryNorm
        0.23523843 = fieldWeight in 2731, product of:
          3.1622777 = tf(freq=10.0), with freq of:
            10.0 = termFreq=10.0
          1.3602545 = idf(docFreq=30841, maxDocs=44218)
          0.0546875 = fieldNorm(doc=2731)
    0.0027887707 = weight(_text_:s in 2731) [ClassicSimilarity], result of:
      0.0027887707 = score(doc=2731,freq=4.0), product of:
        0.023451481 = queryWeight, product of:
          1.0872376 = idf(docFreq=40523, maxDocs=44218)
          0.021569785 = queryNorm
        0.118916616 = fieldWeight in 2731, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          1.0872376 = idf(docFreq=40523, maxDocs=44218)
          0.0546875 = fieldNorm(doc=2731)
  0.06666667 = coord(2/30)

Abstract

An automatic query expansion (AQE) facility in anonline catalogue was evaluated in an operational library setting. The OKAPI experimental system had other features including: ranked output 'best match' keyword searching, automatic stemming, spelling normalisation and cross referencing as well as relevance feedback. A combination of transaction log analysis, search replays, questionnaires and interviews was used for data collection. Findings show that contrary to previous results, AQE was beneficial in a substantial number of searches. Use intentions, the effectiveness of the 'best match' search and user interaction were identified as the main factors affecting the take-up of the query expansion facility

Source

Journal of documentation. 48(1992) no.4, S.406-421

Theme

Semantisches Umfeld in Indexierung u. Retrieval