Search (3 results, page 1 of 1)

  • × author_ss:"Harman, D."
  • × theme_ss:"Retrievalalgorithmen"
  1. Harman, D.: Ranking algorithms (1992) 0.00
    0.002477056 = product of:
      0.004954112 = sum of:
        0.004954112 = product of:
          0.009908224 = sum of:
            0.009908224 = weight(_text_:a in 3511) [ClassicSimilarity], result of:
              0.009908224 = score(doc=3511,freq=10.0), product of:
                0.043477926 = queryWeight, product of:
                  1.153047 = idf(docFreq=37942, maxDocs=44218)
                  0.037706986 = queryNorm
                0.22789092 = fieldWeight in 3511, product of:
                  3.1622777 = tf(freq=10.0), with freq of:
                    10.0 = termFreq=10.0
                  1.153047 = idf(docFreq=37942, maxDocs=44218)
                  0.0625 = fieldNorm(doc=3511)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Abstract
    Presents both a summary of past research done in the development of ranking algorithms and detailed instructions on implementing a ranking type of retrieval system. This type of retrieval system takes as input a natural language query without Boolean syntax and produces a list of records that 'answer' the query, with the records ranked in order of likely relevance. Ranking retrieval systems are particularly appropriate for end-users
    Type
    a
  2. Harman, D.: Relevance feedback and other query modification techniques (1992) 0.00
    0.0019187195 = product of:
      0.003837439 = sum of:
        0.003837439 = product of:
          0.007674878 = sum of:
            0.007674878 = weight(_text_:a in 3508) [ClassicSimilarity], result of:
              0.007674878 = score(doc=3508,freq=6.0), product of:
                0.043477926 = queryWeight, product of:
                  1.153047 = idf(docFreq=37942, maxDocs=44218)
                  0.037706986 = queryNorm
                0.17652355 = fieldWeight in 3508, product of:
                  2.4494898 = tf(freq=6.0), with freq of:
                    6.0 = termFreq=6.0
                  1.153047 = idf(docFreq=37942, maxDocs=44218)
                  0.0625 = fieldNorm(doc=3508)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Abstract
    Presents a survey of relevance feedback techniques that have been used in past research, recommends various query modification approaches for use in different retrieval systems, and gives some guidelines for the efficient design of the relevance feedback component of a retrieval system
    Type
    a
  3. Harman, D.; Fox, E.; Baeza-Yates, R.; Lee, W.: Inverted files (1992) 0.00
    0.0015666279 = product of:
      0.0031332558 = sum of:
        0.0031332558 = product of:
          0.0062665115 = sum of:
            0.0062665115 = weight(_text_:a in 3497) [ClassicSimilarity], result of:
              0.0062665115 = score(doc=3497,freq=4.0), product of:
                0.043477926 = queryWeight, product of:
                  1.153047 = idf(docFreq=37942, maxDocs=44218)
                  0.037706986 = queryNorm
                0.14413087 = fieldWeight in 3497, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  1.153047 = idf(docFreq=37942, maxDocs=44218)
                  0.0625 = fieldNorm(doc=3497)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Abstract
    This chaper presents a survey of the various structures (techniques) that can be used in building inverted files, and gives the details for producing an inverted file using sorted arrays. The chapter ends with 2 modifications to this basic method that are affective for large data collections
    Type
    a