Search (1 results, page 1 of 1)

  • × author_ss:"Bar-Ilan, J."
  • × theme_ss:"Retrievalstudien"
  • × theme_ss:"Suchmaschinen"
  1. Bar-Ilan, J.: Methods for measuring search engine performance over time (2002) 0.00 
    0.0043350267 = product of:
  0.01300508 = sum of:
    0.01300508 = weight(_text_:a in 305) [ClassicSimilarity], result of:
      0.01300508 = score(doc=305,freq=12.0), product of:
        0.05209492 = queryWeight, product of:
          1.153047 = idf(docFreq=37942, maxDocs=44218)
          0.045180224 = queryNorm
        0.24964198 = fieldWeight in 305, product of:
          3.4641016 = tf(freq=12.0), with freq of:
            12.0 = termFreq=12.0
          1.153047 = idf(docFreq=37942, maxDocs=44218)
          0.0625 = fieldNorm(doc=305)
  0.33333334 = coord(1/3)
    Abstract
    This study introduces methods for evaluating search engine performance over a time period. Several measures are defined, which as a whole describe search engine functionality over time. The necessary setup for such studies is described, and the use of these measures is illustrated through a specific example. The set of measures introduced here may serve as a guideline for the search engines for testing and improving their functionality. We recommend setting up a standard suite of measures for evaluating search engine performance.
    Type
    a