-
Lee, Y.-R.: ¬A study on the conditions of using OPAC access points and subject searching by users (1997)
0.05
0.04612931 = product of:
0.09225862 = sum of:
0.09225862 = product of:
0.13838792 = sum of:
0.09047914 = weight(_text_:y in 933) [ClassicSimilarity], result of:
0.09047914 = score(doc=933,freq=2.0), product of:
0.21271187 = queryWeight, product of:
4.8124003 = idf(docFreq=976, maxDocs=44218)
0.044200785 = queryNorm
0.4253601 = fieldWeight in 933, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.8124003 = idf(docFreq=976, maxDocs=44218)
0.0625 = fieldNorm(doc=933)
0.04790877 = weight(_text_:22 in 933) [ClassicSimilarity], result of:
0.04790877 = score(doc=933,freq=2.0), product of:
0.15478362 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.044200785 = queryNorm
0.30952093 = fieldWeight in 933, 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=933)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Source
- Bulletin of library and information science. 1997, no.22, S.39-55
-
Tseng, Y.-H.: Solving vocabulary problems with interactive query expansion (1998)
0.04
0.04024851 = product of:
0.08049702 = sum of:
0.08049702 = product of:
0.120745525 = sum of:
0.056549463 = weight(_text_:y in 5159) [ClassicSimilarity], result of:
0.056549463 = score(doc=5159,freq=2.0), product of:
0.21271187 = queryWeight, product of:
4.8124003 = idf(docFreq=976, maxDocs=44218)
0.044200785 = queryNorm
0.26585007 = fieldWeight in 5159, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.8124003 = idf(docFreq=976, maxDocs=44218)
0.0390625 = fieldNorm(doc=5159)
0.06419606 = weight(_text_:n in 5159) [ClassicSimilarity], result of:
0.06419606 = score(doc=5159,freq=4.0), product of:
0.19057861 = queryWeight, product of:
4.3116565 = idf(docFreq=1611, maxDocs=44218)
0.044200785 = queryNorm
0.33684817 = fieldWeight in 5159, product of:
2.0 = tf(freq=4.0), with freq of:
4.0 = termFreq=4.0
4.3116565 = idf(docFreq=1611, maxDocs=44218)
0.0390625 = fieldNorm(doc=5159)
0.6666667 = coord(2/3)
0.5 = coord(1/2)
- Abstract
- One of the major causes of search failures in information retrieval systems is vocabulary mismatch. Presents a solution to the vocabulary problem through 2 strategies known as term suggestion (TS) and term relevance feedback (TRF). In TS, collection specific terms are extracted from the text collection. These terms and their frequencies constitute the keyword database for suggesting terms in response to users' queries. One effect of this term suggestion is that it functions as a dynamic directory if the query is a general term that contains broad meaning. In term relevance feedback, terms extracted from the top ranked documents retrieved from the previous query are shown to users for relevance feedback. In the experiment, interactive TS provides very high precision rates while achieving similar recall rates as n-gram matching. Local TRF achieves improvement in both precision and recall rate in a full text news database and degrades slightly in recall rate in bibliographic databases due to the very limited source of information for feedback. In terms of Rijsbergen's combined measure of recall and precision, both TS and TRF achieve better performance than n-gram matching, which implies that the greater improvement in precision rate compensates the slight degradation in recall rate for TS and TRF
-
Hsieh, Y.-s.: ¬A study on the users' perception to the body language of reference librarians (1997)
0.02
0.018849822 = product of:
0.037699644 = sum of:
0.037699644 = product of:
0.11309893 = sum of:
0.11309893 = weight(_text_:y in 2819) [ClassicSimilarity], result of:
0.11309893 = score(doc=2819,freq=2.0), product of:
0.21271187 = queryWeight, product of:
4.8124003 = idf(docFreq=976, maxDocs=44218)
0.044200785 = queryNorm
0.53170013 = fieldWeight in 2819, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.8124003 = idf(docFreq=976, maxDocs=44218)
0.078125 = fieldNorm(doc=2819)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
-
Fu, Y.-h.: ¬The theory and empirical studies on information seeking (1997)
0.02
0.015079858 = product of:
0.030159716 = sum of:
0.030159716 = product of:
0.09047914 = sum of:
0.09047914 = weight(_text_:y in 397) [ClassicSimilarity], result of:
0.09047914 = score(doc=397,freq=2.0), product of:
0.21271187 = queryWeight, product of:
4.8124003 = idf(docFreq=976, maxDocs=44218)
0.044200785 = queryNorm
0.4253601 = fieldWeight in 397, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.8124003 = idf(docFreq=976, maxDocs=44218)
0.0625 = fieldNorm(doc=397)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
-
Cheng, L.-y.: On bibliographic(al) control (1998)
0.02
0.015079858 = product of:
0.030159716 = sum of:
0.030159716 = product of:
0.09047914 = sum of:
0.09047914 = weight(_text_:y in 3376) [ClassicSimilarity], result of:
0.09047914 = score(doc=3376,freq=2.0), product of:
0.21271187 = queryWeight, product of:
4.8124003 = idf(docFreq=976, maxDocs=44218)
0.044200785 = queryNorm
0.4253601 = fieldWeight in 3376, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.8124003 = idf(docFreq=976, maxDocs=44218)
0.0625 = fieldNorm(doc=3376)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
-
Xianghao, G.; Yixin, Z.; Li, Y.: ¬A new method of news test understanding and abstracting based on speech acts theory (1998)
0.02
0.015079858 = product of:
0.030159716 = sum of:
0.030159716 = product of:
0.09047914 = sum of:
0.09047914 = weight(_text_:y in 3532) [ClassicSimilarity], result of:
0.09047914 = score(doc=3532,freq=2.0), product of:
0.21271187 = queryWeight, product of:
4.8124003 = idf(docFreq=976, maxDocs=44218)
0.044200785 = queryNorm
0.4253601 = fieldWeight in 3532, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.8124003 = idf(docFreq=976, maxDocs=44218)
0.0625 = fieldNorm(doc=3532)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
-
Tsay, M.-Y.: From Science Citation Index to Journal Citation Reports, amd criteria for journals evaluation (1997)
0.01
0.013194876 = product of:
0.026389752 = sum of:
0.026389752 = product of:
0.07916925 = sum of:
0.07916925 = weight(_text_:y in 657) [ClassicSimilarity], result of:
0.07916925 = score(doc=657,freq=2.0), product of:
0.21271187 = queryWeight, product of:
4.8124003 = idf(docFreq=976, maxDocs=44218)
0.044200785 = queryNorm
0.3721901 = fieldWeight in 657, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.8124003 = idf(docFreq=976, maxDocs=44218)
0.0546875 = fieldNorm(doc=657)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
-
Tseng, Y.-H.: Keyword extraction techniques and relevance feedback (1997)
0.01
0.013194876 = product of:
0.026389752 = sum of:
0.026389752 = product of:
0.07916925 = sum of:
0.07916925 = weight(_text_:y in 1830) [ClassicSimilarity], result of:
0.07916925 = score(doc=1830,freq=2.0), product of:
0.21271187 = queryWeight, product of:
4.8124003 = idf(docFreq=976, maxDocs=44218)
0.044200785 = queryNorm
0.3721901 = fieldWeight in 1830, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.8124003 = idf(docFreq=976, maxDocs=44218)
0.0546875 = fieldNorm(doc=1830)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
-
Huang, Y.-L.: ¬A theoretic and empirical research of cluster indexing for Mandarine Chinese full text document (1998)
0.01
0.013194876 = product of:
0.026389752 = sum of:
0.026389752 = product of:
0.07916925 = sum of:
0.07916925 = weight(_text_:y in 513) [ClassicSimilarity], result of:
0.07916925 = score(doc=513,freq=2.0), product of:
0.21271187 = queryWeight, product of:
4.8124003 = idf(docFreq=976, maxDocs=44218)
0.044200785 = queryNorm
0.3721901 = fieldWeight in 513, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.8124003 = idf(docFreq=976, maxDocs=44218)
0.0546875 = fieldNorm(doc=513)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
-
Hsieh, Y.-s.: ¬A study on the users' perception to the body language of reference librarians (1997)
0.01
0.011309894 = product of:
0.022619788 = sum of:
0.022619788 = product of:
0.06785936 = sum of:
0.06785936 = weight(_text_:y in 2818) [ClassicSimilarity], result of:
0.06785936 = score(doc=2818,freq=2.0), product of:
0.21271187 = queryWeight, product of:
4.8124003 = idf(docFreq=976, maxDocs=44218)
0.044200785 = queryNorm
0.3190201 = fieldWeight in 2818, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
4.8124003 = idf(docFreq=976, maxDocs=44218)
0.046875 = fieldNorm(doc=2818)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
-
Yi, H.; Shubai, L.: Application of classification in information organization under the networking environment (1998)
0.01
0.007984796 = product of:
0.015969591 = sum of:
0.015969591 = product of:
0.04790877 = sum of:
0.04790877 = weight(_text_:22 in 3236) [ClassicSimilarity], result of:
0.04790877 = score(doc=3236,freq=2.0), product of:
0.15478362 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.044200785 = queryNorm
0.30952093 = fieldWeight in 3236, 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=3236)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Source
- Journal of the China Society for Scientific and Technical Information. 17(1998) no.1, S.19-22
-
Lin, W.-Y.C.: ¬The concept and applications of faceted classifications (2006)
0.01
0.007984796 = product of:
0.015969591 = sum of:
0.015969591 = product of:
0.04790877 = sum of:
0.04790877 = weight(_text_:22 in 5083) [ClassicSimilarity], result of:
0.04790877 = score(doc=5083,freq=2.0), product of:
0.15478362 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.044200785 = queryNorm
0.30952093 = fieldWeight in 5083, 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=5083)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Date
- 27. 5.2007 22:19:35
-
Pu, H.-T.: Exploration of personalized information service for OPAC (1997)
0.01
0.006986696 = product of:
0.013973392 = sum of:
0.013973392 = product of:
0.041920174 = sum of:
0.041920174 = weight(_text_:22 in 1772) [ClassicSimilarity], result of:
0.041920174 = score(doc=1772,freq=2.0), product of:
0.15478362 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.044200785 = queryNorm
0.2708308 = fieldWeight in 1772, 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=1772)
0.33333334 = coord(1/3)
0.5 = coord(1/2)
- Date
- 4. 8.1998 19:36:22
