Search (22 results, page 1 of 2)

  • × year_i:[1990 TO 2000}
  • × theme_ss:"Retrievalalgorithmen"
  1. Jascó, P.: Mapping algorithms to translate natural language questions into search queries for Web databases (1997) 0.02
    0.01949679 = product of:
      0.03899358 = sum of:
        0.03899358 = product of:
          0.07798716 = sum of:
            0.07798716 = weight(_text_:p in 314) [ClassicSimilarity], result of:
              0.07798716 = score(doc=314,freq=2.0), product of:
                0.16359726 = queryWeight, product of:
                  3.5955126 = idf(docFreq=3298, maxDocs=44218)
                  0.045500398 = queryNorm
                0.47670212 = fieldWeight in 314, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5955126 = idf(docFreq=3298, maxDocs=44218)
                  0.09375 = fieldNorm(doc=314)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  2. Willett, P.: Best-match text retrieval (1993) 0.02
    0.016247325 = product of:
      0.03249465 = sum of:
        0.03249465 = product of:
          0.0649893 = sum of:
            0.0649893 = weight(_text_:p in 7818) [ClassicSimilarity], result of:
              0.0649893 = score(doc=7818,freq=2.0), product of:
                0.16359726 = queryWeight, product of:
                  3.5955126 = idf(docFreq=3298, maxDocs=44218)
                  0.045500398 = queryNorm
                0.39725178 = fieldWeight in 7818, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5955126 = idf(docFreq=3298, maxDocs=44218)
                  0.078125 = fieldNorm(doc=7818)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  3. Robertson, S.E.: OKAPI at TREC-1 (1994) 0.02
    0.016247325 = product of:
      0.03249465 = sum of:
        0.03249465 = product of:
          0.0649893 = sum of:
            0.0649893 = weight(_text_:p in 7953) [ClassicSimilarity], result of:
              0.0649893 = score(doc=7953,freq=2.0), product of:
                0.16359726 = queryWeight, product of:
                  3.5955126 = idf(docFreq=3298, maxDocs=44218)
                  0.045500398 = queryNorm
                0.39725178 = fieldWeight in 7953, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5955126 = idf(docFreq=3298, maxDocs=44218)
                  0.078125 = fieldNorm(doc=7953)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Type
    p
  4. Fox, E.; Betrabet, S.; Koushik, M.; Lee, W.: Extended Boolean models (1992) 0.01
    0.013786313 = product of:
      0.027572626 = sum of:
        0.027572626 = product of:
          0.055145252 = sum of:
            0.055145252 = weight(_text_:p in 3512) [ClassicSimilarity], result of:
              0.055145252 = score(doc=3512,freq=4.0), product of:
                0.16359726 = queryWeight, product of:
                  3.5955126 = idf(docFreq=3298, maxDocs=44218)
                  0.045500398 = queryNorm
                0.33707932 = fieldWeight in 3512, product of:
                  2.0 = tf(freq=4.0), with freq of:
                    4.0 = termFreq=4.0
                  3.5955126 = idf(docFreq=3298, maxDocs=44218)
                  0.046875 = fieldNorm(doc=3512)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Abstract
    The classical interpretation of Boolean operators in an information retrieval system is in general too strict. A standard Boolean query rarely comes close to retrieving all and only those documents which are relevant to a query. Many models have been proposed with the aim of softening the interpretation of the Boolean operators in order to improve the precision and recall of the search results. This chapter discusses 3 such models: the Mixed Min and Max (MMM), the Paice, and the P-noem models. The MMM and Paice models are essentially variations of the classical fuzzy-set model, while the P-norm scheme is a distance-based approach. Our experimental results indicate that each of the above models provide better performance than the classical Boolean model in terms of retrieval effectiveness
  5. Al-Hawamdeh, S.; Smith, G.; Willett, P.; Vere, R. de: Using nearest-neighbour searching techniques to access full-text documents (1991) 0.01
    0.01299786 = product of:
      0.02599572 = sum of:
        0.02599572 = product of:
          0.05199144 = sum of:
            0.05199144 = weight(_text_:p in 2300) [ClassicSimilarity], result of:
              0.05199144 = score(doc=2300,freq=2.0), product of:
                0.16359726 = queryWeight, product of:
                  3.5955126 = idf(docFreq=3298, maxDocs=44218)
                  0.045500398 = queryNorm
                0.31780142 = fieldWeight in 2300, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5955126 = idf(docFreq=3298, maxDocs=44218)
                  0.0625 = fieldNorm(doc=2300)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  6. Jones, G.; Robertson, A.M.; Willett, P.: ¬An introduction to genetic algorithms and to their use in information retrieval (1994) 0.01
    0.01299786 = product of:
      0.02599572 = sum of:
        0.02599572 = product of:
          0.05199144 = sum of:
            0.05199144 = weight(_text_:p in 7415) [ClassicSimilarity], result of:
              0.05199144 = score(doc=7415,freq=2.0), product of:
                0.16359726 = queryWeight, product of:
                  3.5955126 = idf(docFreq=3298, maxDocs=44218)
                  0.045500398 = queryNorm
                0.31780142 = fieldWeight in 7415, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5955126 = idf(docFreq=3298, maxDocs=44218)
                  0.0625 = fieldNorm(doc=7415)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  7. Srinivasan, P.: Query expansion and MEDLINE (1996) 0.01
    0.01299786 = product of:
      0.02599572 = sum of:
        0.02599572 = product of:
          0.05199144 = sum of:
            0.05199144 = weight(_text_:p in 8453) [ClassicSimilarity], result of:
              0.05199144 = score(doc=8453,freq=2.0), product of:
                0.16359726 = queryWeight, product of:
                  3.5955126 = idf(docFreq=3298, maxDocs=44218)
                  0.045500398 = queryNorm
                0.31780142 = fieldWeight in 8453, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5955126 = idf(docFreq=3298, maxDocs=44218)
                  0.0625 = fieldNorm(doc=8453)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  8. Robertson, A.M.; Willett, P.: Use of genetic algorithms in information retrieval (1995) 0.01
    0.01299786 = product of:
      0.02599572 = sum of:
        0.02599572 = product of:
          0.05199144 = sum of:
            0.05199144 = weight(_text_:p in 2418) [ClassicSimilarity], result of:
              0.05199144 = score(doc=2418,freq=2.0), product of:
                0.16359726 = queryWeight, product of:
                  3.5955126 = idf(docFreq=3298, maxDocs=44218)
                  0.045500398 = queryNorm
                0.31780142 = fieldWeight in 2418, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5955126 = idf(docFreq=3298, maxDocs=44218)
                  0.0625 = fieldNorm(doc=2418)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  9. Robertson, M.; Willett, P.: ¬An upperbound to the performance of ranked output searching : optimal weighting of query terms using a genetic algorithms (1996) 0.01
    0.01299786 = product of:
      0.02599572 = sum of:
        0.02599572 = product of:
          0.05199144 = sum of:
            0.05199144 = weight(_text_:p in 6977) [ClassicSimilarity], result of:
              0.05199144 = score(doc=6977,freq=2.0), product of:
                0.16359726 = queryWeight, product of:
                  3.5955126 = idf(docFreq=3298, maxDocs=44218)
                  0.045500398 = queryNorm
                0.31780142 = fieldWeight in 6977, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5955126 = idf(docFreq=3298, maxDocs=44218)
                  0.0625 = fieldNorm(doc=6977)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  10. Chakrabarti, S.; Dom, B.; Kumar, S.R.; Raghavan, P.; Rajagopalan, S.; Tomkins, A.; Kleinberg, J.M.; Gibson, D.: Neue Pfade durch den Internet-Dschungel : Die zweite Generation von Web-Suchmaschinen (1999) 0.01
    0.01299786 = product of:
      0.02599572 = sum of:
        0.02599572 = product of:
          0.05199144 = sum of:
            0.05199144 = weight(_text_:p in 3) [ClassicSimilarity], result of:
              0.05199144 = score(doc=3,freq=2.0), product of:
                0.16359726 = queryWeight, product of:
                  3.5955126 = idf(docFreq=3298, maxDocs=44218)
                  0.045500398 = queryNorm
                0.31780142 = fieldWeight in 3, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5955126 = idf(docFreq=3298, maxDocs=44218)
                  0.0625 = fieldNorm(doc=3)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  11. Faloutsos, C.: Signature files (1992) 0.01
    0.012329352 = product of:
      0.024658704 = sum of:
        0.024658704 = product of:
          0.04931741 = sum of:
            0.04931741 = weight(_text_:22 in 3499) [ClassicSimilarity], result of:
              0.04931741 = score(doc=3499,freq=2.0), product of:
                0.15933464 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.045500398 = queryNorm
                0.30952093 = fieldWeight in 3499, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.0625 = fieldNorm(doc=3499)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    7. 5.1999 15:22:48
  12. Robertson, S.E.: OKAPI at TREC-3 (1995) 0.01
    0.011373127 = product of:
      0.022746254 = sum of:
        0.022746254 = product of:
          0.045492508 = sum of:
            0.045492508 = weight(_text_:p in 5694) [ClassicSimilarity], result of:
              0.045492508 = score(doc=5694,freq=2.0), product of:
                0.16359726 = queryWeight, product of:
                  3.5955126 = idf(docFreq=3298, maxDocs=44218)
                  0.045500398 = queryNorm
                0.27807623 = fieldWeight in 5694, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5955126 = idf(docFreq=3298, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=5694)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Type
    p
  13. Chang, C.-H.; Hsu, C.-C.: Integrating query expansion and conceptual relevance feedback for personalized Web information retrieval (1998) 0.01
    0.010788183 = product of:
      0.021576365 = sum of:
        0.021576365 = product of:
          0.04315273 = sum of:
            0.04315273 = weight(_text_:22 in 1319) [ClassicSimilarity], result of:
              0.04315273 = score(doc=1319,freq=2.0), product of:
                0.15933464 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.045500398 = queryNorm
                0.2708308 = fieldWeight in 1319, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.0546875 = fieldNorm(doc=1319)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    1. 8.1996 22:08:06
  14. Rada, R.; Barlow, J.; Potharst, J.; Zanstra, P.; Bijstra, D.: Document ranking using an enriched thesaurus (1991) 0.01
    0.009748395 = product of:
      0.01949679 = sum of:
        0.01949679 = product of:
          0.03899358 = sum of:
            0.03899358 = weight(_text_:p in 6626) [ClassicSimilarity], result of:
              0.03899358 = score(doc=6626,freq=2.0), product of:
                0.16359726 = queryWeight, product of:
                  3.5955126 = idf(docFreq=3298, maxDocs=44218)
                  0.045500398 = queryNorm
                0.23835106 = fieldWeight in 6626, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5955126 = idf(docFreq=3298, maxDocs=44218)
                  0.046875 = fieldNorm(doc=6626)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  15. Aigrain, P.; Longueville, V.: ¬A model for the evaluation of expansion techniques in information retrieval systems (1994) 0.01
    0.009748395 = product of:
      0.01949679 = sum of:
        0.01949679 = product of:
          0.03899358 = sum of:
            0.03899358 = weight(_text_:p in 5331) [ClassicSimilarity], result of:
              0.03899358 = score(doc=5331,freq=2.0), product of:
                0.16359726 = queryWeight, product of:
                  3.5955126 = idf(docFreq=3298, maxDocs=44218)
                  0.045500398 = queryNorm
                0.23835106 = fieldWeight in 5331, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5955126 = idf(docFreq=3298, maxDocs=44218)
                  0.046875 = fieldNorm(doc=5331)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  16. Joss, M.W.; Wszola, S.: ¬The engines that can : text search and retrieval software, their strategies, and vendors (1996) 0.01
    0.009247013 = product of:
      0.018494027 = sum of:
        0.018494027 = product of:
          0.036988053 = sum of:
            0.036988053 = weight(_text_:22 in 5123) [ClassicSimilarity], result of:
              0.036988053 = score(doc=5123,freq=2.0), product of:
                0.15933464 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.045500398 = queryNorm
                0.23214069 = fieldWeight in 5123, 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=5123)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    12. 9.1996 13:56:22
  17. Kelledy, F.; Smeaton, A.F.: Signature files and beyond (1996) 0.01
    0.009247013 = product of:
      0.018494027 = sum of:
        0.018494027 = product of:
          0.036988053 = sum of:
            0.036988053 = weight(_text_:22 in 6973) [ClassicSimilarity], result of:
              0.036988053 = score(doc=6973,freq=2.0), product of:
                0.15933464 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.045500398 = queryNorm
                0.23214069 = fieldWeight in 6973, 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=6973)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Source
    Information retrieval: new systems and current research. Proceedings of the 16th Research Colloquium of the British Computer Society Information Retrieval Specialist Group, Drymen, Scotland, 22-23 Mar 94. Ed.: R. Leon
  18. Information retrieval : data structures and algorithms (1992) 0.01
    0.008123662 = product of:
      0.016247325 = sum of:
        0.016247325 = product of:
          0.03249465 = sum of:
            0.03249465 = weight(_text_:p in 3495) [ClassicSimilarity], result of:
              0.03249465 = score(doc=3495,freq=2.0), product of:
                0.16359726 = queryWeight, product of:
                  3.5955126 = idf(docFreq=3298, maxDocs=44218)
                  0.045500398 = queryNorm
                0.19862589 = fieldWeight in 3495, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5955126 = idf(docFreq=3298, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=3495)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Content
    An edited volume containing data structures and algorithms for information retrieval including a disk with examples written in C. for prgrammers and students interested in parsing text, automated indexing, its the first collection in book form of the basic data structures and algorithms that are critical to the storage and retrieval of documents. ------------------Enthält die Kapitel: FRAKES, W.B.: Introduction to information storage and retrieval systems; BAEZA-YATES, R.S.: Introduction to data structures and algorithms related to information retrieval; HARMAN, D. u.a.: Inverted files; FALOUTSOS, C.: Signature files; GONNET, G.H. u.a.: New indices for text: PAT trees and PAT arrays; FORD, D.A. u. S. CHRISTODOULAKIS: File organizations for optical disks; FOX, C.: Lexical analysis and stoplists; FRAKES, W.B.: Stemming algorithms; SRINIVASAN, P.: Thesaurus construction; BAEZA-YATES, R.A.: String searching algorithms; HARMAN, D.: Relevance feedback and other query modification techniques; WARTIK, S.: Boolean operators; WARTIK, S. u.a.: Hashing algorithms; HARMAN, D.: Ranking algorithms; FOX, E.: u.a.: Extended Boolean models; RASMUSSEN, E.: Clustering algorithms; HOLLAAR, L.: Special-purpose hardware for information retrieval; STANFILL, C.: Parallel information retrieval algorithms
  19. Kantor, P.; Kim, M.H.; Ibraev, U.; Atasoy, K.: Estimating the number of relevant documents in enormous collections (1999) 0.01
    0.008123662 = product of:
      0.016247325 = sum of:
        0.016247325 = product of:
          0.03249465 = sum of:
            0.03249465 = weight(_text_:p in 6690) [ClassicSimilarity], result of:
              0.03249465 = score(doc=6690,freq=2.0), product of:
                0.16359726 = queryWeight, product of:
                  3.5955126 = idf(docFreq=3298, maxDocs=44218)
                  0.045500398 = queryNorm
                0.19862589 = fieldWeight in 6690, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5955126 = idf(docFreq=3298, maxDocs=44218)
                  0.0390625 = fieldNorm(doc=6690)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
  20. Burgin, R.: ¬The retrieval effectiveness of 5 clustering algorithms as a function of indexing exhaustivity (1995) 0.01
    0.007705845 = product of:
      0.01541169 = sum of:
        0.01541169 = product of:
          0.03082338 = sum of:
            0.03082338 = weight(_text_:22 in 3365) [ClassicSimilarity], result of:
              0.03082338 = score(doc=3365,freq=2.0), product of:
                0.15933464 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.045500398 = queryNorm
                0.19345059 = fieldWeight in 3365, 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=3365)
          0.5 = coord(1/2)
      0.5 = coord(1/2)
    
    Date
    22. 2.1996 11:20:06