Search (2 results, page 1 of 1)

  • × author_ss:"Robertson, A.M."
  • × theme_ss:"Semantisches Umfeld in Indexierung u. Retrieval"
  1. Robertson, A.M.; Willett, P.: Applications of n-grams in textual information systems (1998) 0.00
    4.5571616E-4 = product of:
      0.006835742 = sum of:
        0.006835742 = product of:
          0.013671484 = sum of:
            0.013671484 = weight(_text_:information in 4715) [ClassicSimilarity], result of:
              0.013671484 = score(doc=4715,freq=6.0), product of:
                0.050870337 = queryWeight, product of:
                  1.7554779 = idf(docFreq=20772, maxDocs=44218)
                  0.028978055 = queryNorm
                0.2687516 = fieldWeight in 4715, product of:
                  2.4494898 = tf(freq=6.0), with freq of:
                    6.0 = termFreq=6.0
                  1.7554779 = idf(docFreq=20772, maxDocs=44218)
                  0.0625 = fieldNorm(doc=4715)
          0.5 = coord(1/2)
      0.06666667 = coord(1/15)
    
    Abstract
    Provides an introduction to the use of n-grams in textual information systems, where an n-gram is a string of n, usually adjacent, characters, extracted from a section of continuous text. Applications that can be implemented efficiently and effectively using sets of n-grams include spelling errors detection and correction, query expansion, information retrieval with serial, inverted and signature files, dictionary look up, text compression, and language identification
  2. Ekmekcioglu, F.C.; Robertson, A.M.; Willett, P.: Effectiveness of query expansion in ranked-output document retrieval systems (1992) 0.00
    2.6310782E-4 = product of:
      0.0039466172 = sum of:
        0.0039466172 = product of:
          0.0078932345 = sum of:
            0.0078932345 = weight(_text_:information in 5689) [ClassicSimilarity], result of:
              0.0078932345 = score(doc=5689,freq=2.0), product of:
                0.050870337 = queryWeight, product of:
                  1.7554779 = idf(docFreq=20772, maxDocs=44218)
                  0.028978055 = queryNorm
                0.1551638 = fieldWeight in 5689, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  1.7554779 = idf(docFreq=20772, maxDocs=44218)
                  0.0625 = fieldNorm(doc=5689)
          0.5 = coord(1/2)
      0.06666667 = coord(1/15)
    
    Source
    Journal of information science. 18(1992) no.2, S.139-147