Search (1 results, page 1 of 1)

  • × author_ss:"Bar-Ilan, J."
  • × theme_ss:"Retrievalstudien"
  • × theme_ss:"Suchmaschinen"
  • × year_i:[2000 TO 2010}
  1. Bar-Ilan, J.: Methods for measuring search engine performance over time (2002) 0.00
    0.0029784553 = product of:
      0.0059569106 = sum of:
        0.0059569106 = product of:
          0.011913821 = sum of:
            0.011913821 = weight(_text_:a in 305) [ClassicSimilarity], result of:
              0.011913821 = score(doc=305,freq=12.0), product of:
                0.04772363 = queryWeight, product of:
                  1.153047 = idf(docFreq=37942, maxDocs=44218)
                  0.041389145 = 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)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    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