-
Couvreur, T.R.; Benzel, R.N.; Miller, S.F.; Zeitler, D.N.; Lee, D.L.; Singhal, M.; Shivaratri, N.; Wong, W.Y.P.: ¬An analysis of performance and cost factors in searching large text databases using parallel search systems (1994)
0.03
0.031910684 = product of:
0.06382137 = sum of:
0.06382137 = product of:
0.12764274 = sum of:
0.12764274 = weight(_text_:abstracts in 7657) [ClassicSimilarity], result of:
0.12764274 = score(doc=7657,freq=2.0), product of:
0.2890173 = queryWeight, product of:
5.7104354 = idf(docFreq=397, maxDocs=44218)
0.05061213 = queryNorm
0.44164395 = fieldWeight in 7657, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.7104354 = idf(docFreq=397, maxDocs=44218)
0.0546875 = fieldNorm(doc=7657)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- The results of modelling the performance of searching large text databases (>10 GBytes) via various parallel hardware architectures and search algorithms are discussed. The performance under load and the cost of each configuration are compared. Strengths, weaknesses, performance sensitivities, and search features supported for each configuration are also addressed. In addition, a common search workload used in the modelling is described. The search workload is derived from a set of searches run against the Chemical Abstracts file of bibliographic and abstract text available on STN International. This common workload is applied to all configurations modelled to provide a common basis of comparison
-
Pirkola, A.; Jarvelin, K.: ¬The effect of anaphor and ellipsis resolution on proximity searching in a text database (1995)
0.02
0.022793347 = product of:
0.045586694 = sum of:
0.045586694 = product of:
0.09117339 = sum of:
0.09117339 = weight(_text_:abstracts in 4088) [ClassicSimilarity], result of:
0.09117339 = score(doc=4088,freq=2.0), product of:
0.2890173 = queryWeight, product of:
5.7104354 = idf(docFreq=397, maxDocs=44218)
0.05061213 = queryNorm
0.31545997 = fieldWeight in 4088, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
5.7104354 = idf(docFreq=397, maxDocs=44218)
0.0390625 = fieldNorm(doc=4088)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Abstract
- So far, methods for ellipsis and anaphor resolution have been developed and the effects of anaphor resolution have been analyzed in the context of statistical information retrieval of scientific abstracts. No significant improvements has been observed. Analyzes the effects of ellipsis and anaphor resolution on proximity searching in a full text database. Anaphora and ellipsis are classified on the basis of the type of their correlates / antecedents rather than, as traditional, on the basis of their own linguistic type. The classification differentiates proper names and common nouns of basic words, compound words, and phrases. The study was carried out in a newspaper article database containing 55.000 full text articles. A set of 154 keyword pairs in different categories was created. Human resolution of keyword ellipsis and anaphora was performed to identify sentences and paragraphs which would match proximity searches after resolution. Findings indicate that ellipsis and anaphor resolution is most relevant for proper name phrases and only marginal in the other keyword categories. Therefore the recall effect of restricted resolution of proper name phrases only was analyzed for keyword pairs containing at least 1 proper name phrase. Findings indicate a recall increase of 38.2% in sentence searches, and 28.8% in paragraph searches when proper name ellipsis were resolved. The recall increase was 17.6% sentence searches, and 19.8% in paragraph searches when proper name anaphora were resolved. Some simple and computationally justifiable resolution method might be developed only for proper name phrases to support keyword based full text information retrieval. Discusses elements of such a method
-
Laegreid, J.A.: SIFT: a Norwegian information retrieval system (1993)
0.01
0.0137144895 = product of:
0.027428979 = sum of:
0.027428979 = product of:
0.054857958 = sum of:
0.054857958 = weight(_text_:22 in 7701) [ClassicSimilarity], result of:
0.054857958 = score(doc=7701,freq=2.0), product of:
0.17723505 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.05061213 = queryNorm
0.30952093 = fieldWeight in 7701, 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=7701)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 23. 1.1999 19:22:09
-
Reinisch, F.: Wer suchet - der findet? : oder Die Überwindung der sprachlichen Grenzen bei der Suche in Volltextdatenbanken (2000)
0.01
0.0137144895 = product of:
0.027428979 = sum of:
0.027428979 = product of:
0.054857958 = sum of:
0.054857958 = weight(_text_:22 in 4919) [ClassicSimilarity], result of:
0.054857958 = score(doc=4919,freq=2.0), product of:
0.17723505 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.05061213 = queryNorm
0.30952093 = fieldWeight in 4919, 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=4919)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 22. 7.2000 17:48:06
-
Zillmann, H.: OSIRIS und eLib : Information Retrieval und Search Engines in Full-text Databases (2001)
0.01
0.0137144895 = product of:
0.027428979 = sum of:
0.027428979 = product of:
0.054857958 = sum of:
0.054857958 = weight(_text_:22 in 5937) [ClassicSimilarity], result of:
0.054857958 = score(doc=5937,freq=2.0), product of:
0.17723505 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.05061213 = queryNorm
0.30952093 = fieldWeight in 5937, 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=5937)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 14. 6.2001 12:22:31
-
Dambeck, H.; Engler, T.: Gesucht und gefunden : Neun Volltext-Suchprogramme für den Desktop (2002)
0.01
0.0137144895 = product of:
0.027428979 = sum of:
0.027428979 = product of:
0.054857958 = sum of:
0.054857958 = weight(_text_:22 in 1169) [ClassicSimilarity], result of:
0.054857958 = score(doc=1169,freq=2.0), product of:
0.17723505 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.05061213 = queryNorm
0.30952093 = fieldWeight in 1169, 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=1169)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Source
- c't. 2002, H.22, S.190-197
-
Sievert, M.E.; McKinin, E.J.: Why full-text misses some relevant documents : an analysis of documents not retrieved by CCML or MEDIS (1989)
0.01
0.010285866 = product of:
0.020571733 = sum of:
0.020571733 = product of:
0.041143466 = sum of:
0.041143466 = weight(_text_:22 in 3564) [ClassicSimilarity], result of:
0.041143466 = score(doc=3564,freq=2.0), product of:
0.17723505 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.05061213 = queryNorm
0.23214069 = fieldWeight in 3564, 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=3564)
0.5 = coord(1/2)
0.5 = coord(1/2)
- Date
- 9. 1.1996 10:22:31
