Document (#11596)

Author
Srinivasan, P.
Title
Intelligent information retrieval using rough set approximations
Source
Information processing and management. 25(1989) no.4, S.347-361
Year
1989
Abstract
The theory of rough sets was introduced in 1982. It allows the classification of objects into sets of equivalent members based on their attributes. Any combination of the same objetcts (or even their attributes) may be examined using the resultant classification. The theory has direct applications in the design and evaluation of classification schemes and the selection of discriminating attributes. Introductory papers discuss its application in the domain of medical diagnostic systems and the design of information retrieval systems accessing collections of documents. Advantages offered by the theory are: the implicit inclusion of Boolean logic; term weighting; and the ability to rank retrieved documents.
Theme
Retrievalalgorithmen

Similar documents (author)

  1. Srinivasan, P.: Expert interface to Library of Congress Subject Headings (1990/91) 5.41
    5.4077277 = sum of:
      5.4077277 = weight(author_txt:srinivasan in 2209) [ClassicSimilarity], result of:
        5.4077277 = score(doc=2209,freq=1.0), product of:
          0.99999994 = queryWeight, product of:
            8.652365 = idf(docFreq=20, maxDocs=44218)
            0.115575336 = queryNorm
          5.407728 = fieldWeight in 2209, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            8.652365 = idf(docFreq=20, maxDocs=44218)
            0.625 = fieldNorm(doc=2209)
    
  2. Srinivasan, P.: Query expansion and MEDLINE (1996) 5.41
    5.4077277 = sum of:
      5.4077277 = weight(author_txt:srinivasan in 8453) [ClassicSimilarity], result of:
        5.4077277 = score(doc=8453,freq=1.0), product of:
          0.99999994 = queryWeight, product of:
            8.652365 = idf(docFreq=20, maxDocs=44218)
            0.115575336 = queryNorm
          5.407728 = fieldWeight in 8453, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            8.652365 = idf(docFreq=20, maxDocs=44218)
            0.625 = fieldNorm(doc=8453)
    
  3. Srinivasan, P.: On generalizing the Two-Poisson Model (1990) 5.41
    5.4077277 = sum of:
      5.4077277 = weight(author_txt:srinivasan in 2880) [ClassicSimilarity], result of:
        5.4077277 = score(doc=2880,freq=1.0), product of:
          0.99999994 = queryWeight, product of:
            8.652365 = idf(docFreq=20, maxDocs=44218)
            0.115575336 = queryNorm
          5.407728 = fieldWeight in 2880, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            8.652365 = idf(docFreq=20, maxDocs=44218)
            0.625 = fieldNorm(doc=2880)
    
  4. Srinivasan, P.: Optimal document-indexing vocabulary for MEDLINE (1996) 5.41
    5.4077277 = sum of:
      5.4077277 = weight(author_txt:srinivasan in 6634) [ClassicSimilarity], result of:
        5.4077277 = score(doc=6634,freq=1.0), product of:
          0.99999994 = queryWeight, product of:
            8.652365 = idf(docFreq=20, maxDocs=44218)
            0.115575336 = queryNorm
          5.407728 = fieldWeight in 6634, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            8.652365 = idf(docFreq=20, maxDocs=44218)
            0.625 = fieldNorm(doc=6634)
    
  5. Srinivasan, P.: Thesaurus construction (1992) 5.41
    5.4077277 = sum of:
      5.4077277 = weight(author_txt:srinivasan in 3504) [ClassicSimilarity], result of:
        5.4077277 = score(doc=3504,freq=1.0), product of:
          0.99999994 = queryWeight, product of:
            8.652365 = idf(docFreq=20, maxDocs=44218)
            0.115575336 = queryNorm
          5.407728 = fieldWeight in 3504, product of:
            1.0 = tf(freq=1.0), with freq of:
              1.0 = termFreq=1.0
            8.652365 = idf(docFreq=20, maxDocs=44218)
            0.625 = fieldNorm(doc=3504)
    

Similar documents (content)

  1. Hassanien, A.-E.: Rough set approach for attribute reduction and rule generation : a case of patients with suspected breast cancer (2004) 0.34
    0.34228987 = sum of:
      0.34228987 = product of:
        1.2224638 = sum of:
          0.052401733 = weight(abstract_txt:intelligent in 2883) [ClassicSimilarity], result of:
            0.052401733 = score(doc=2883,freq=1.0), product of:
              0.13405257 = queryWeight, product of:
                1.0027524 = boost
                6.2544694 = idf(docFreq=230, maxDocs=44218)
                0.021374254 = queryNorm
              0.39090434 = fieldWeight in 2883, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.2544694 = idf(docFreq=230, maxDocs=44218)
                0.0625 = fieldNorm(doc=2883)
          0.017013155 = weight(abstract_txt:systems in 2883) [ClassicSimilarity], result of:
            0.017013155 = score(doc=2883,freq=1.0), product of:
              0.07978317 = queryWeight, product of:
                1.0940238 = boost
                3.4118783 = idf(docFreq=3963, maxDocs=44218)
                0.021374254 = queryNorm
              0.2132424 = fieldWeight in 2883, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.4118783 = idf(docFreq=3963, maxDocs=44218)
                0.0625 = fieldNorm(doc=2883)
          0.059715375 = weight(abstract_txt:sets in 2883) [ClassicSimilarity], result of:
            0.059715375 = score(doc=2883,freq=1.0), product of:
              0.18426612 = queryWeight, product of:
                1.6626234 = boost
                5.185142 = idf(docFreq=672, maxDocs=44218)
                0.021374254 = queryNorm
              0.32407138 = fieldWeight in 2883, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.185142 = idf(docFreq=672, maxDocs=44218)
                0.0625 = fieldNorm(doc=2883)
          0.0708031 = weight(abstract_txt:classification in 2883) [ClassicSimilarity], result of:
            0.0708031 = score(doc=2883,freq=3.0), product of:
              0.16383734 = queryWeight, product of:
                1.9200972 = boost
                3.9920752 = idf(docFreq=2218, maxDocs=44218)
                0.021374254 = queryNorm
              0.4321548 = fieldWeight in 2883, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                3.9920752 = idf(docFreq=2218, maxDocs=44218)
                0.0625 = fieldNorm(doc=2883)
          0.0848089 = weight(abstract_txt:theory in 2883) [ClassicSimilarity], result of:
            0.0848089 = score(doc=2883,freq=2.0), product of:
              0.21152876 = queryWeight, product of:
                2.1817324 = boost
                4.5360413 = idf(docFreq=1287, maxDocs=44218)
                0.021374254 = queryNorm
              0.40093318 = fieldWeight in 2883, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.5360413 = idf(docFreq=1287, maxDocs=44218)
                0.0625 = fieldNorm(doc=2883)
          0.6063885 = weight(abstract_txt:rough in 2883) [ClassicSimilarity], result of:
            0.6063885 = score(doc=2883,freq=6.0), product of:
              0.47552308 = queryWeight, product of:
                2.6708958 = boost
                8.329592 = idf(docFreq=28, maxDocs=44218)
                0.021374254 = queryNorm
              1.2752031 = fieldWeight in 2883, product of:
                2.4494898 = tf(freq=6.0), with freq of:
                  6.0 = termFreq=6.0
                8.329592 = idf(docFreq=28, maxDocs=44218)
                0.0625 = fieldNorm(doc=2883)
          0.3313331 = weight(abstract_txt:attributes in 2883) [ClassicSimilarity], result of:
            0.3313331 = score(doc=2883,freq=5.0), product of:
              0.38660875 = queryWeight, product of:
                2.9495287 = boost
                6.1323667 = idf(docFreq=260, maxDocs=44218)
                0.021374254 = queryNorm
              0.8570243 = fieldWeight in 2883, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                6.1323667 = idf(docFreq=260, maxDocs=44218)
                0.0625 = fieldNorm(doc=2883)
        0.28 = coord(7/25)
    
  2. Bell, D.A.; Guan, J.W.: Computational methods for rough classification and discovery (1998) 0.22
    0.21742128 = sum of:
      0.21742128 = product of:
        1.0871063 = sum of:
          0.037740927 = weight(abstract_txt:using in 2909) [ClassicSimilarity], result of:
            0.037740927 = score(doc=2909,freq=2.0), product of:
              0.08219756 = queryWeight, product of:
                1.1104541 = boost
                3.4631186 = idf(docFreq=3765, maxDocs=44218)
                0.021374254 = queryNorm
              0.459149 = fieldWeight in 2909, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.4631186 = idf(docFreq=3765, maxDocs=44218)
                0.09375 = fieldNorm(doc=2909)
          0.08957306 = weight(abstract_txt:sets in 2909) [ClassicSimilarity], result of:
            0.08957306 = score(doc=2909,freq=1.0), product of:
              0.18426612 = queryWeight, product of:
                1.6626234 = boost
                5.185142 = idf(docFreq=672, maxDocs=44218)
                0.021374254 = queryNorm
              0.48610705 = fieldWeight in 2909, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.185142 = idf(docFreq=672, maxDocs=44218)
                0.09375 = fieldNorm(doc=2909)
          0.061317284 = weight(abstract_txt:classification in 2909) [ClassicSimilarity], result of:
            0.061317284 = score(doc=2909,freq=1.0), product of:
              0.16383734 = queryWeight, product of:
                1.9200972 = boost
                3.9920752 = idf(docFreq=2218, maxDocs=44218)
                0.021374254 = queryNorm
              0.37425706 = fieldWeight in 2909, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.9920752 = idf(docFreq=2218, maxDocs=44218)
                0.09375 = fieldNorm(doc=2909)
          0.1558039 = weight(abstract_txt:theory in 2909) [ClassicSimilarity], result of:
            0.1558039 = score(doc=2909,freq=3.0), product of:
              0.21152876 = queryWeight, product of:
                2.1817324 = boost
                4.5360413 = idf(docFreq=1287, maxDocs=44218)
                0.021374254 = queryNorm
              0.7365613 = fieldWeight in 2909, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.5360413 = idf(docFreq=1287, maxDocs=44218)
                0.09375 = fieldNorm(doc=2909)
          0.7426712 = weight(abstract_txt:rough in 2909) [ClassicSimilarity], result of:
            0.7426712 = score(doc=2909,freq=4.0), product of:
              0.47552308 = queryWeight, product of:
                2.6708958 = boost
                8.329592 = idf(docFreq=28, maxDocs=44218)
                0.021374254 = queryNorm
              1.5617985 = fieldWeight in 2909, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                8.329592 = idf(docFreq=28, maxDocs=44218)
                0.09375 = fieldNorm(doc=2909)
        0.2 = coord(5/25)
    
  3. Miyamoto, S.: Application of rough sets to information retrieval (1998) 0.19
    0.18766682 = sum of:
      0.18766682 = product of:
        1.1729176 = sum of:
          0.04670601 = weight(abstract_txt:retrieval in 559) [ClassicSimilarity], result of:
            0.04670601 = score(doc=559,freq=3.0), product of:
              0.08276918 = queryWeight, product of:
                1.1143086 = boost
                3.4751394 = idf(docFreq=3720, maxDocs=44218)
                0.021374254 = queryNorm
              0.5642923 = fieldWeight in 559, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                3.4751394 = idf(docFreq=3720, maxDocs=44218)
                0.09375 = fieldNorm(doc=559)
          0.12667544 = weight(abstract_txt:sets in 559) [ClassicSimilarity], result of:
            0.12667544 = score(doc=559,freq=2.0), product of:
              0.18426612 = queryWeight, product of:
                1.6626234 = boost
                5.185142 = idf(docFreq=672, maxDocs=44218)
                0.021374254 = queryNorm
              0.68745923 = fieldWeight in 559, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.185142 = idf(docFreq=672, maxDocs=44218)
                0.09375 = fieldNorm(doc=559)
          0.08995342 = weight(abstract_txt:theory in 559) [ClassicSimilarity], result of:
            0.08995342 = score(doc=559,freq=1.0), product of:
              0.21152876 = queryWeight, product of:
                2.1817324 = boost
                4.5360413 = idf(docFreq=1287, maxDocs=44218)
                0.021374254 = queryNorm
              0.42525387 = fieldWeight in 559, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.5360413 = idf(docFreq=1287, maxDocs=44218)
                0.09375 = fieldNorm(doc=559)
          0.90958273 = weight(abstract_txt:rough in 559) [ClassicSimilarity], result of:
            0.90958273 = score(doc=559,freq=6.0), product of:
              0.47552308 = queryWeight, product of:
                2.6708958 = boost
                8.329592 = idf(docFreq=28, maxDocs=44218)
                0.021374254 = queryNorm
              1.9128046 = fieldWeight in 559, product of:
                2.4494898 = tf(freq=6.0), with freq of:
                  6.0 = termFreq=6.0
                8.329592 = idf(docFreq=28, maxDocs=44218)
                0.09375 = fieldNorm(doc=559)
        0.16 = coord(4/25)
    
  4. Lingras, P.J.; Yao, Y.Y.: Data mining using extensions of the rough set model (1998) 0.17
    0.1718088 = sum of:
      0.1718088 = product of:
        1.073805 = sum of:
          0.026686866 = weight(abstract_txt:using in 2910) [ClassicSimilarity], result of:
            0.026686866 = score(doc=2910,freq=1.0), product of:
              0.08219756 = queryWeight, product of:
                1.1104541 = boost
                3.4631186 = idf(docFreq=3765, maxDocs=44218)
                0.021374254 = queryNorm
              0.32466736 = fieldWeight in 2910, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.4631186 = idf(docFreq=3765, maxDocs=44218)
                0.09375 = fieldNorm(doc=2910)
          0.08957306 = weight(abstract_txt:sets in 2910) [ClassicSimilarity], result of:
            0.08957306 = score(doc=2910,freq=1.0), product of:
              0.18426612 = queryWeight, product of:
                1.6626234 = boost
                5.185142 = idf(docFreq=672, maxDocs=44218)
                0.021374254 = queryNorm
              0.48610705 = fieldWeight in 2910, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.185142 = idf(docFreq=672, maxDocs=44218)
                0.09375 = fieldNorm(doc=2910)
          0.12721336 = weight(abstract_txt:theory in 2910) [ClassicSimilarity], result of:
            0.12721336 = score(doc=2910,freq=2.0), product of:
              0.21152876 = queryWeight, product of:
                2.1817324 = boost
                4.5360413 = idf(docFreq=1287, maxDocs=44218)
                0.021374254 = queryNorm
              0.6013998 = fieldWeight in 2910, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.5360413 = idf(docFreq=1287, maxDocs=44218)
                0.09375 = fieldNorm(doc=2910)
          0.8303317 = weight(abstract_txt:rough in 2910) [ClassicSimilarity], result of:
            0.8303317 = score(doc=2910,freq=5.0), product of:
              0.47552308 = queryWeight, product of:
                2.6708958 = boost
                8.329592 = idf(docFreq=28, maxDocs=44218)
                0.021374254 = queryNorm
              1.7461438 = fieldWeight in 2910, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                8.329592 = idf(docFreq=28, maxDocs=44218)
                0.09375 = fieldNorm(doc=2910)
        0.16 = coord(4/25)
    
  5. Yang, H.; King, I.; Lyu, M.R.: ¬The generalized dependency degree between attributes (2007) 0.13
    0.13382204 = sum of:
      0.13382204 = product of:
        0.55759186 = sum of:
          0.017013155 = weight(abstract_txt:systems in 1322) [ClassicSimilarity], result of:
            0.017013155 = score(doc=1322,freq=1.0), product of:
              0.07978317 = queryWeight, product of:
                1.0940238 = boost
                3.4118783 = idf(docFreq=3963, maxDocs=44218)
                0.021374254 = queryNorm
              0.2132424 = fieldWeight in 1322, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.4118783 = idf(docFreq=3963, maxDocs=44218)
                0.0625 = fieldNorm(doc=1322)
          0.025160618 = weight(abstract_txt:using in 1322) [ClassicSimilarity], result of:
            0.025160618 = score(doc=1322,freq=2.0), product of:
              0.08219756 = queryWeight, product of:
                1.1104541 = boost
                3.4631186 = idf(docFreq=3765, maxDocs=44218)
                0.021374254 = queryNorm
              0.30609933 = fieldWeight in 1322, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.4631186 = idf(docFreq=3765, maxDocs=44218)
                0.0625 = fieldNorm(doc=1322)
          0.059715375 = weight(abstract_txt:sets in 1322) [ClassicSimilarity], result of:
            0.059715375 = score(doc=1322,freq=1.0), product of:
              0.18426612 = queryWeight, product of:
                1.6626234 = boost
                5.185142 = idf(docFreq=672, maxDocs=44218)
                0.021374254 = queryNorm
              0.32407138 = fieldWeight in 1322, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.185142 = idf(docFreq=672, maxDocs=44218)
                0.0625 = fieldNorm(doc=1322)
          0.05996895 = weight(abstract_txt:theory in 1322) [ClassicSimilarity], result of:
            0.05996895 = score(doc=1322,freq=1.0), product of:
              0.21152876 = queryWeight, product of:
                2.1817324 = boost
                4.5360413 = idf(docFreq=1287, maxDocs=44218)
                0.021374254 = queryNorm
              0.28350258 = fieldWeight in 1322, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                4.5360413 = idf(docFreq=1287, maxDocs=44218)
                0.0625 = fieldNorm(doc=1322)
          0.24755707 = weight(abstract_txt:rough in 1322) [ClassicSimilarity], result of:
            0.24755707 = score(doc=1322,freq=1.0), product of:
              0.47552308 = queryWeight, product of:
                2.6708958 = boost
                8.329592 = idf(docFreq=28, maxDocs=44218)
                0.021374254 = queryNorm
              0.5205995 = fieldWeight in 1322, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                8.329592 = idf(docFreq=28, maxDocs=44218)
                0.0625 = fieldNorm(doc=1322)
          0.14817667 = weight(abstract_txt:attributes in 1322) [ClassicSimilarity], result of:
            0.14817667 = score(doc=1322,freq=1.0), product of:
              0.38660875 = queryWeight, product of:
                2.9495287 = boost
                6.1323667 = idf(docFreq=260, maxDocs=44218)
                0.021374254 = queryNorm
              0.38327292 = fieldWeight in 1322, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.1323667 = idf(docFreq=260, maxDocs=44218)
                0.0625 = fieldNorm(doc=1322)
        0.24 = coord(6/25)