Search (3 results, page 1 of 1)

  • × theme_ss:"Computerlinguistik"
  • × theme_ss:"Automatisches Klassifizieren"
  1. Hotho, A.; Bloehdorn, S.: Data Mining 2004 : Text classification by boosting weak learners based on terms and concepts (2004) 0.06
    0.06324223 = product of:
      0.09486334 = sum of:
        0.081037596 = product of:
          0.24311279 = sum of:
            0.24311279 = weight(_text_:3a in 562) [ClassicSimilarity], result of:
              0.24311279 = score(doc=562,freq=2.0), product of:
                0.43257114 = queryWeight, product of:
                  8.478011 = idf(docFreq=24, maxDocs=44218)
                  0.051022716 = queryNorm
                0.56201804 = fieldWeight in 562, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  8.478011 = idf(docFreq=24, maxDocs=44218)
                  0.046875 = fieldNorm(doc=562)
          0.33333334 = coord(1/3)
        0.013825747 = product of:
          0.04147724 = sum of:
            0.04147724 = weight(_text_:22 in 562) [ClassicSimilarity], result of:
              0.04147724 = score(doc=562,freq=2.0), product of:
                0.17867287 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.051022716 = queryNorm
                0.23214069 = fieldWeight in 562, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.046875 = fieldNorm(doc=562)
          0.33333334 = coord(1/3)
      0.6666667 = coord(2/3)
    
    Content
    Vgl.: http://www.google.de/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&ved=0CEAQFjAA&url=http%3A%2F%2Fciteseerx.ist.psu.edu%2Fviewdoc%2Fdownload%3Fdoi%3D10.1.1.91.4940%26rep%3Drep1%26type%3Dpdf&ei=dOXrUMeIDYHDtQahsIGACg&usg=AFQjCNHFWVh6gNPvnOrOS9R3rkrXCNVD-A&sig2=5I2F5evRfMnsttSgFF9g7Q&bvm=bv.1357316858,d.Yms.
    Date
    8. 1.2013 10:22:32
  2. Frobese, D.T.: Klassifikationsaufgaben mit der SENTRAX : Konkreter Fall: Automatische Detektion von SPAM (2006) 0.01
    0.01201222 = product of:
      0.03603666 = sum of:
        0.03603666 = weight(_text_:im in 5980) [ClassicSimilarity], result of:
          0.03603666 = score(doc=5980,freq=2.0), product of:
            0.1442303 = queryWeight, product of:
              2.8267863 = idf(docFreq=7115, maxDocs=44218)
              0.051022716 = queryNorm
            0.24985497 = fieldWeight in 5980, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              2.8267863 = idf(docFreq=7115, maxDocs=44218)
              0.0625 = fieldNorm(doc=5980)
      0.33333334 = coord(1/3)
    
    Abstract
    Die Suchfunktionen des SENTRAX-Verfahrens werden für die Klassifizierung von Mails und im Besonderen für die Detektion von SPAM eingesetzt. Die Eigenschaften einer kontextähnlichen Suche und die Fehlertoleranz sollen genutzt werden, um SPAM Nachrichten treffsicher aufzuspüren.
  3. Ko, Y.: ¬A new term-weighting scheme for text classification using the odds of positive and negative class probabilities (2015) 0.01
    0.006877549 = product of:
      0.020632647 = sum of:
        0.020632647 = product of:
          0.06189794 = sum of:
            0.06189794 = weight(_text_:retrieval in 2339) [ClassicSimilarity], result of:
              0.06189794 = score(doc=2339,freq=8.0), product of:
                0.15433937 = queryWeight, product of:
                  3.024915 = idf(docFreq=5836, maxDocs=44218)
                  0.051022716 = queryNorm
                0.40105087 = fieldWeight in 2339, product of:
                  2.828427 = tf(freq=8.0), with freq of:
                    8.0 = termFreq=8.0
                  3.024915 = idf(docFreq=5836, maxDocs=44218)
                  0.046875 = fieldNorm(doc=2339)
          0.33333334 = coord(1/3)
      0.33333334 = coord(1/3)
    
    Abstract
    Text classification (TC) is a core technique for text mining and information retrieval. It has been applied to many applications in many different research and industrial areas. Term-weighting schemes assign an appropriate weight to each term to obtain a high TC performance. Although term weighting is one of the important modules for TC and TC has different peculiarities from those in information retrieval, many term-weighting schemes used in information retrieval, such as term frequency-inverse document frequency (tf-idf), have been used in TC in the same manner. The peculiarity of TC that differs most from information retrieval is the existence of class information. This article proposes a new term-weighting scheme that uses class information using positive and negative class distributions. As a result, the proposed scheme, log tf-TRR, consistently performs better than do other schemes using class information as well as traditional schemes such as tf-idf.

Languages

Types