Search (47 results, page 1 of 3)

  • × theme_ss:"Automatisches Indexieren"
  1. Greiner-Petter, A.; Schubotz, M.; Cohl, H.S.; Gipp, B.: Semantic preserving bijective mappings for expressions involving special functions between computer algebra systems and document preparation systems (2019) 0.03 
    0.03418831 = sum of:
  0.020334125 = product of:
    0.0813365 = sum of:
      0.0813365 = weight(_text_:authors in 5499) [ClassicSimilarity], result of:
        0.0813365 = score(doc=5499,freq=6.0), product of:
          0.23308155 = queryWeight, product of:
            4.558814 = idf(docFreq=1258, maxDocs=44218)
            0.051127672 = queryNorm
          0.34896153 = fieldWeight in 5499, product of:
            2.4494898 = tf(freq=6.0), with freq of:
              6.0 = termFreq=6.0
            4.558814 = idf(docFreq=1258, maxDocs=44218)
            0.03125 = fieldNorm(doc=5499)
    0.25 = coord(1/4)
  0.013854188 = product of:
    0.027708376 = sum of:
      0.027708376 = weight(_text_:22 in 5499) [ClassicSimilarity], result of:
        0.027708376 = score(doc=5499,freq=2.0), product of:
          0.1790404 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.051127672 = queryNorm
          0.15476047 = fieldWeight in 5499, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.03125 = fieldNorm(doc=5499)
    0.5 = coord(1/2)
    Abstract
    Purpose Modern mathematicians and scientists of math-related disciplines often use Document Preparation Systems (DPS) to write and Computer Algebra Systems (CAS) to calculate mathematical expressions. Usually, they translate the expressions manually between DPS and CAS. This process is time-consuming and error-prone. The purpose of this paper is to automate this translation. This paper uses Maple and Mathematica as the CAS, and LaTeX as the DPS. Design/methodology/approach Bruce Miller at the National Institute of Standards and Technology (NIST) developed a collection of special LaTeX macros that create links from mathematical symbols to their definitions in the NIST Digital Library of Mathematical Functions (DLMF). The authors are using these macros to perform rule-based translations between the formulae in the DLMF and CAS. Moreover, the authors develop software to ease the creation of new rules and to discover inconsistencies. Findings The authors created 396 mappings and translated 58.8 percent of DLMF formulae (2,405 expressions) successfully between Maple and DLMF. For a significant percentage, the special function definitions in Maple and the DLMF were different. An atomic symbol in one system maps to a composite expression in the other system. The translator was also successfully used for automatic verification of mathematical online compendia and CAS. The evaluation techniques discovered two errors in the DLMF and one defect in Maple. Originality/value This paper introduces the first translation tool for special functions between LaTeX and CAS. The approach improves error-prone manual translations and can be used to verify mathematical online compendia and CAS.
    Date
    20. 1.2015 18:30:22
  2. Li, Z.: Research on dynamic morphological indexing (1998) 0.03 
    0.032183733 = product of:
  0.064367466 = sum of:
    0.064367466 = product of:
      0.12873493 = sum of:
        0.12873493 = weight(_text_:z in 3242) [ClassicSimilarity], result of:
          0.12873493 = score(doc=3242,freq=2.0), product of:
            0.2728844 = queryWeight, product of:
              5.337313 = idf(docFreq=577, maxDocs=44218)
              0.051127672 = queryNorm
            0.47175628 = fieldWeight in 3242, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.337313 = idf(docFreq=577, maxDocs=44218)
              0.0625 = fieldNorm(doc=3242)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
  3. Plaunt, C.; Norgard, B.A.: ¬An association-based method for automatic indexing with a controlled vocabulary (1998) 0.03 
    0.03199262 = sum of:
  0.014674889 = product of:
    0.058699556 = sum of:
      0.058699556 = weight(_text_:authors in 1794) [ClassicSimilarity], result of:
        0.058699556 = score(doc=1794,freq=2.0), product of:
          0.23308155 = queryWeight, product of:
            4.558814 = idf(docFreq=1258, maxDocs=44218)
            0.051127672 = queryNorm
          0.25184128 = fieldWeight in 1794, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            4.558814 = idf(docFreq=1258, maxDocs=44218)
            0.0390625 = fieldNorm(doc=1794)
    0.25 = coord(1/4)
  0.017317735 = product of:
    0.03463547 = sum of:
      0.03463547 = weight(_text_:22 in 1794) [ClassicSimilarity], result of:
        0.03463547 = score(doc=1794,freq=2.0), product of:
          0.1790404 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.051127672 = queryNorm
          0.19345059 = fieldWeight in 1794, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.0390625 = fieldNorm(doc=1794)
    0.5 = coord(1/2)
    Abstract
    In this article, we describe and test a two-stage algorithm based on a lexical collocation technique which maps from the lexical clues contained in a document representation into a controlled vocabulary list of subject headings. Using a collection of 4.626 INSPEC documents, we create a 'dictionary' of associations between the lexical items contained in the titles, authors, and abstracts, and controlled vocabulary subject headings assigned to those records by human indexers using a likelihood ratio statistic as the measure of association. In the deployment stage, we use the dictiony to predict which of the controlled vocabulary subject headings best describe new documents when they are presented to the system. Our evaluation of this algorithm, in which we compare the automatically assigned subject headings to the subject headings assigned to the test documents by human catalogers, shows that we can obtain results comparable to, and consistent with, human cataloging. In effect we have cast this as a classic partial match information retrieval problem. We consider the problem to be one of 'retrieving' (or assigning) the most probably 'relevant' (or correct) controlled vocabulary subject headings to a document based on the clues contained in that document
    Date
    11. 9.2000 19:53:22
  4. Voorhees, E.M.: Implementing agglomerative hierarchic clustering algorithms for use in document retrieval (1986) 0.03 
    0.027708376 = product of:
  0.05541675 = sum of:
    0.05541675 = product of:
      0.1108335 = sum of:
        0.1108335 = weight(_text_:22 in 402) [ClassicSimilarity], result of:
          0.1108335 = score(doc=402,freq=2.0), product of:
            0.1790404 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.051127672 = queryNorm
            0.61904186 = fieldWeight in 402, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.125 = fieldNorm(doc=402)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Source
    Information processing and management. 22(1986) no.6, S.465-476
  5. Mesquita, L.A.P.; Souza, R.R.; Baracho Porto, R.M.A.: Noun phrases in automatic indexing: : a structural analysis of the distribution of relevant terms in doctoral theses (2014) 0.03 
    0.025594098 = sum of:
  0.011739911 = product of:
    0.046959642 = sum of:
      0.046959642 = weight(_text_:authors in 1442) [ClassicSimilarity], result of:
        0.046959642 = score(doc=1442,freq=2.0), product of:
          0.23308155 = queryWeight, product of:
            4.558814 = idf(docFreq=1258, maxDocs=44218)
            0.051127672 = queryNorm
          0.20147301 = fieldWeight in 1442, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            4.558814 = idf(docFreq=1258, maxDocs=44218)
            0.03125 = fieldNorm(doc=1442)
    0.25 = coord(1/4)
  0.013854188 = product of:
    0.027708376 = sum of:
      0.027708376 = weight(_text_:22 in 1442) [ClassicSimilarity], result of:
        0.027708376 = score(doc=1442,freq=2.0), product of:
          0.1790404 = queryWeight, product of:
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.051127672 = queryNorm
          0.15476047 = fieldWeight in 1442, product of:
            1.4142135 = tf(freq=2.0), with freq of:
              2.0 = termFreq=2.0
            3.5018296 = idf(docFreq=3622, maxDocs=44218)
            0.03125 = fieldNorm(doc=1442)
    0.5 = coord(1/2)
    Abstract
    The main objective of this research was to analyze whether there was a characteristic distribution behavior of relevant terms over a scientific text that could contribute as a criterion for their process of automatic indexing. The terms considered in this study were only full noun phrases contained in the texts themselves. The texts were considered a total of 98 doctoral theses of the eight areas of knowledge in a same university. Initially, 20 full noun phrases were automatically extracted from each text as candidates to be the most relevant terms, and each author of each text assigned a relevance value 0-6 (not relevant and highly relevant, respectively) for each of the 20 noun phrases sent. Only, 22.1 % of noun phrases were considered not relevant. A relevance values of the terms assigned by the authors were associated with their positions in the text. Each full noun phrases found in the text was considered as a valid linear position. The results that were obtained showed values resulting from this distribution by considering two types of position: linear, with values consolidated into ten equal consecutive parts; and structural, considering parts of the text (such as introduction, development and conclusion). As a result of considerable importance, all areas of knowledge related to the Natural Sciences showed a characteristic behavior in the distribution of relevant terms, as well as all areas of knowledge related to Social Sciences showed the same characteristic behavior of distribution, but distinct from the Natural Sciences. The difference of the distribution behavior between the Natural and Social Sciences can be clearly visualized through graphs. All behaviors, including the general behavior of all areas of knowledge together, were characterized in polynomial equations and can be applied in future as criteria for automatic indexing. Until the present date this work has become inedited of for two reasons: to present a method for characterizing the distribution of relevant terms in a scientific text, and also, through this method, pointing out a quantitative trait difference between the Natural and Social Sciences.
    Source
    Knowledge organization in the 21st century: between historical patterns and future prospects. Proceedings of the Thirteenth International ISKO Conference 19-22 May 2014, Kraków, Poland. Ed.: Wieslaw Babik
  6. Fuhr, N.; Niewelt, B.: ¬Ein Retrievaltest mit automatisch indexierten Dokumenten (1984) 0.02 
    0.024244828 = product of:
  0.048489656 = sum of:
    0.048489656 = product of:
      0.09697931 = sum of:
        0.09697931 = weight(_text_:22 in 262) [ClassicSimilarity], result of:
          0.09697931 = score(doc=262,freq=2.0), product of:
            0.1790404 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.051127672 = queryNorm
            0.5416616 = fieldWeight in 262, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.109375 = fieldNorm(doc=262)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Date
    20.10.2000 12:22:23
  7. Hlava, M.M.K.: Automatic indexing : comparing rule-based and statistics-based indexing systems (2005) 0.02 
    0.024244828 = product of:
  0.048489656 = sum of:
    0.048489656 = product of:
      0.09697931 = sum of:
        0.09697931 = weight(_text_:22 in 6265) [ClassicSimilarity], result of:
          0.09697931 = score(doc=6265,freq=2.0), product of:
            0.1790404 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.051127672 = queryNorm
            0.5416616 = fieldWeight in 6265, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.109375 = fieldNorm(doc=6265)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Source
    Information outlook. 9(2005) no.8, S.22-23
  8. Advances in intelligent retrieval: Proc. of a conference ... Wadham College, Oxford, 16.-17.4.1985 (1986) 0.02 
    0.0241378 = product of:
  0.0482756 = sum of:
    0.0482756 = product of:
      0.0965512 = sum of:
        0.0965512 = weight(_text_:z in 1384) [ClassicSimilarity], result of:
          0.0965512 = score(doc=1384,freq=2.0), product of:
            0.2728844 = queryWeight, product of:
              5.337313 = idf(docFreq=577, maxDocs=44218)
              0.051127672 = queryNorm
            0.35381722 = fieldWeight in 1384, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.337313 = idf(docFreq=577, maxDocs=44218)
              0.046875 = fieldNorm(doc=1384)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Content
    Enthält die Beiträge: ADDIS, T.: Extended relational analysis: a design approach to knowledge-based systems; PARKINSON, D.: Supercomputers and non-numeric processing; McGREGOR, D.R. u. J.R. MALONE: An architectural approach to advances in information retrieval; ALLEN, M.J. u. O.S. HARRISON: Word processing and information retrieval: some practical problems; MURTAGH, F.: Clustering and nearest neighborhood searching; ENSER, P.G.B.: Experimenting with the automatic classification of books; TESKEY, N. u. Z. RAZAK: An analysis of ranking for free text retrieval systems; ZARRI, G.P.: Interactive information retrieval: an artificial intelligence approach to deal with biographical data; HANCOX, P. u. F. SMITH: A case system processor for the PRECIS indexing language; ROUAULT, J.: Linguistic methods in information retrieval systems; ARAGON-RAMIREZ, V. u. C.D. PAICE: Design of a system for the online elucidation of natural language search statements; BROOKS, H.M., P.J. DANIELS u. N.J. BELKIN: Problem descriptions and user models: developing an intelligent interface for document retrieval systems; BLACK, W.J., P. HARGREAVES u. P.B. MAYES: HEADS: a cataloguing advisory system; BELL, D.A.: An architecture for integrating data, knowledge, and information bases
  9. Fuhr, N.: Ranking-Experimente mit gewichteter Indexierung (1986) 0.02 
    0.02078128 = product of:
  0.04156256 = sum of:
    0.04156256 = product of:
      0.08312512 = sum of:
        0.08312512 = weight(_text_:22 in 58) [ClassicSimilarity], result of:
          0.08312512 = score(doc=58,freq=2.0), product of:
            0.1790404 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.051127672 = queryNorm
            0.46428138 = fieldWeight in 58, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.09375 = fieldNorm(doc=58)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Date
    14. 6.2015 22:12:44
  10. Hauer, M.: Automatische Indexierung (2000) 0.02 
    0.02078128 = product of:
  0.04156256 = sum of:
    0.04156256 = product of:
      0.08312512 = sum of:
        0.08312512 = weight(_text_:22 in 5887) [ClassicSimilarity], result of:
          0.08312512 = score(doc=5887,freq=2.0), product of:
            0.1790404 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.051127672 = queryNorm
            0.46428138 = fieldWeight in 5887, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.09375 = fieldNorm(doc=5887)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Source
    Wissen in Aktion: Wege des Knowledge Managements. 22. Online-Tagung der DGI, Frankfurt am Main, 2.-4.5.2000. Proceedings. Hrsg.: R. Schmidt
  11. Fuhr, N.: Rankingexperimente mit gewichteter Indexierung (1986) 0.02 
    0.02078128 = product of:
  0.04156256 = sum of:
    0.04156256 = product of:
      0.08312512 = sum of:
        0.08312512 = weight(_text_:22 in 2051) [ClassicSimilarity], result of:
          0.08312512 = score(doc=2051,freq=2.0), product of:
            0.1790404 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.051127672 = queryNorm
            0.46428138 = fieldWeight in 2051, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.09375 = fieldNorm(doc=2051)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Date
    14. 6.2015 22:12:56
  12. Hauer, M.: Tiefenindexierung im Bibliothekskatalog : 17 Jahre intelligentCAPTURE (2019) 0.02 
    0.02078128 = product of:
  0.04156256 = sum of:
    0.04156256 = product of:
      0.08312512 = sum of:
        0.08312512 = weight(_text_:22 in 5629) [ClassicSimilarity], result of:
          0.08312512 = score(doc=5629,freq=2.0), product of:
            0.1790404 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.051127672 = queryNorm
            0.46428138 = fieldWeight in 5629, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.09375 = fieldNorm(doc=5629)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Source
    B.I.T.online. 22(2019) H.2, S.163-166
  13. Chung, Y.M.; Lee, J.Y.: ¬A corpus-based approach to comparative evaluation of statistical term association measures (2001) 0.02 
    0.020114832 = product of:
  0.040229663 = sum of:
    0.040229663 = product of:
      0.08045933 = sum of:
        0.08045933 = weight(_text_:z in 5769) [ClassicSimilarity], result of:
          0.08045933 = score(doc=5769,freq=2.0), product of:
            0.2728844 = queryWeight, product of:
              5.337313 = idf(docFreq=577, maxDocs=44218)
              0.051127672 = queryNorm
            0.29484767 = fieldWeight in 5769, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.337313 = idf(docFreq=577, maxDocs=44218)
              0.0390625 = fieldNorm(doc=5769)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Abstract
    Statistical association measures have been widely applied in information retrieval research, usually employing a clustering of documents or terms on the basis of their relationships. Applications of the association measures for term clustering include automatic thesaurus construction and query expansion. This research evaluates the similarity of six association measures by comparing the relationship and behavior they demonstrate in various analyses of a test corpus. Analysis techniques include comparisons of highly ranked term pairs and term clusters, analyses of the correlation among the association measures using Pearson's correlation coefficient and MDS mapping, and an analysis of the impact of a term frequency on the association values by means of z-score. The major findings of the study are as follows: First, the most similar association measures are mutual information and Yule's coefficient of colligation Y, whereas cosine and Jaccard coefficients, as well as X**2 statistic and likelihood ratio, demonstrate quite similar behavior for terms with high frequency. Second, among all the measures, the X**2 statistic is the least affected by the frequency of terms. Third, although cosine and Jaccard coefficients tend to emphasize high frequency terms, mutual information and Yule's Y seem to overestimate rare terms
  14. Biebricher, N.; Fuhr, N.; Lustig, G.; Schwantner, M.; Knorz, G.: ¬The automatic indexing system AIR/PHYS : from research to application (1988) 0.02 
    0.017317735 = product of:
  0.03463547 = sum of:
    0.03463547 = product of:
      0.06927094 = sum of:
        0.06927094 = weight(_text_:22 in 1952) [ClassicSimilarity], result of:
          0.06927094 = score(doc=1952,freq=2.0), product of:
            0.1790404 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.051127672 = queryNorm
            0.38690117 = fieldWeight in 1952, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.078125 = fieldNorm(doc=1952)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Date
    16. 8.1998 12:51:22
  15. Kutschekmanesch, S.; Lutes, B.; Moelle, K.; Thiel, U.; Tzeras, K.: Automated multilingual indexing : a synthesis of rule-based and thesaurus-based methods (1998) 0.02 
    0.017317735 = product of:
  0.03463547 = sum of:
    0.03463547 = product of:
      0.06927094 = sum of:
        0.06927094 = weight(_text_:22 in 4157) [ClassicSimilarity], result of:
          0.06927094 = score(doc=4157,freq=2.0), product of:
            0.1790404 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.051127672 = queryNorm
            0.38690117 = fieldWeight in 4157, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.078125 = fieldNorm(doc=4157)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Source
    Information und Märkte: 50. Deutscher Dokumentartag 1998, Kongreß der Deutschen Gesellschaft für Dokumentation e.V. (DGD), Rheinische Friedrich-Wilhelms-Universität Bonn, 22.-24. September 1998. Hrsg. von Marlies Ockenfeld u. Gerhard J. Mantwill
  16. Tsareva, P.V.: Algoritmy dlya raspoznavaniya pozitivnykh i negativnykh vkhozdenii deskriptorov v tekst i protsedura avtomaticheskoi klassifikatsii tekstov (1999) 0.02 
    0.017317735 = product of:
  0.03463547 = sum of:
    0.03463547 = product of:
      0.06927094 = sum of:
        0.06927094 = weight(_text_:22 in 374) [ClassicSimilarity], result of:
          0.06927094 = score(doc=374,freq=2.0), product of:
            0.1790404 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.051127672 = queryNorm
            0.38690117 = fieldWeight in 374, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.078125 = fieldNorm(doc=374)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Date
    1. 4.2002 10:22:41
  17. Stankovic, R. et al.: Indexing of textual databases based on lexical resources : a case study for Serbian (2016) 0.02 
    0.017317735 = product of:
  0.03463547 = sum of:
    0.03463547 = product of:
      0.06927094 = sum of:
        0.06927094 = weight(_text_:22 in 2759) [ClassicSimilarity], result of:
          0.06927094 = score(doc=2759,freq=2.0), product of:
            0.1790404 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.051127672 = queryNorm
            0.38690117 = fieldWeight in 2759, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.078125 = fieldNorm(doc=2759)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
    Date
    1. 2.2016 18:25:22
  18. Carevic, Z.: Semi-automatische Verschlagwortung zur Integration externer semantischer Inhalte innerhalb einer medizinischen Kooperationsplattform (2012) 0.02 
    0.016091866 = product of:
  0.032183733 = sum of:
    0.032183733 = product of:
      0.064367466 = sum of:
        0.064367466 = weight(_text_:z in 897) [ClassicSimilarity], result of:
          0.064367466 = score(doc=897,freq=2.0), product of:
            0.2728844 = queryWeight, product of:
              5.337313 = idf(docFreq=577, maxDocs=44218)
              0.051127672 = queryNorm
            0.23587814 = fieldWeight in 897, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.337313 = idf(docFreq=577, maxDocs=44218)
              0.03125 = fieldNorm(doc=897)
      0.5 = coord(1/2)
  0.5 = coord(1/2)
  19. Yongcheng, W.; Xiaoming, G.; Lixia, W.: Automatic indexing on subject of Chinese text (1998) 0.01 
    0.014674889 = product of:
  0.029349778 = sum of:
    0.029349778 = product of:
      0.11739911 = sum of:
        0.11739911 = weight(_text_:authors in 3241) [ClassicSimilarity], result of:
          0.11739911 = score(doc=3241,freq=2.0), product of:
            0.23308155 = queryWeight, product of:
              4.558814 = idf(docFreq=1258, maxDocs=44218)
              0.051127672 = queryNorm
            0.50368255 = fieldWeight in 3241, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.558814 = idf(docFreq=1258, maxDocs=44218)
              0.078125 = fieldNorm(doc=3241)
      0.25 = coord(1/4)
  0.5 = coord(1/2)
    Abstract
    Outlines the underlying ideas, the basic algorithm and structure of CSAIS 2.1, an automatic indexing system for the subjects of Chinese documents, developed by the authors in 1993
  20. Pulgarin, A.; Gil-Leiva, I.: Bibliometric analysis of the automatic indexing literature : 1956-2000 (2004) 0.01 
    0.014527398 = product of:
  0.029054796 = sum of:
    0.029054796 = product of:
      0.116219185 = sum of:
        0.116219185 = weight(_text_:authors in 2566) [ClassicSimilarity], result of:
          0.116219185 = score(doc=2566,freq=4.0), product of:
            0.23308155 = queryWeight, product of:
              4.558814 = idf(docFreq=1258, maxDocs=44218)
              0.051127672 = queryNorm
            0.49862027 = fieldWeight in 2566, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              4.558814 = idf(docFreq=1258, maxDocs=44218)
              0.0546875 = fieldNorm(doc=2566)
      0.25 = coord(1/4)
  0.5 = coord(1/2)
    Abstract
    We present a bibliometric study of a corpus of 839 bibliographic references about automatic indexing, covering the period 1956-2000. We analyse the distribution of authors and works, the obsolescence and its dispersion, and the distribution of the literature by topic, year, and source type. We conclude that: (i) there has been a constant interest on the part of researchers; (ii) the most studied topics were the techniques and methods employed and the general aspects of automatic indexing; (iii) the productivity of the authors does fit a Lotka distribution (Dmax=0.02 and critical value=0.054); (iv) the annual aging factor is 95%; and (v) the dispersion of the literature is low.

Authors

Years

Languages

  • e 28
  • d 16
  • chi 2
  • ru 1
  • More… Less…

Types

  • a 42
  • el 3
  • x 3
  • m 1
  • s 1
  • More… Less…

Themes