Avrahami, T.T.; Yau, L.; Si, L.; Callan, J.P.: ¬The FedLemur project : Federated search in the real world (2006)
0.05
0.048607394 = product of:
0.09721479 = sum of:
0.029934023 = weight(_text_:web in 5271) [ClassicSimilarity], result of:
0.029934023 = score(doc=5271,freq=2.0), product of:
0.13836423 = queryWeight, product of:
3.2635105 = idf(docFreq=4597, maxDocs=44218)
0.042397358 = queryNorm
0.21634221 = fieldWeight in 5271, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.2635105 = idf(docFreq=4597, maxDocs=44218)
0.046875 = fieldNorm(doc=5271)
0.025717068 = weight(_text_:retrieval in 5271) [ClassicSimilarity], result of:
0.025717068 = score(doc=5271,freq=2.0), product of:
0.12824841 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.042397358 = queryNorm
0.20052543 = fieldWeight in 5271, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.046875 = fieldNorm(doc=5271)
0.041563697 = product of:
0.062345542 = sum of:
0.027880006 = weight(_text_:system in 5271) [ClassicSimilarity], result of:
0.027880006 = score(doc=5271,freq=2.0), product of:
0.13353272 = queryWeight, product of:
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.042397358 = queryNorm
0.20878783 = fieldWeight in 5271, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.1495528 = idf(docFreq=5152, maxDocs=44218)
0.046875 = fieldNorm(doc=5271)
0.034465536 = weight(_text_:22 in 5271) [ClassicSimilarity], result of:
0.034465536 = score(doc=5271,freq=2.0), product of:
0.14846832 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.042397358 = queryNorm
0.23214069 = fieldWeight in 5271, 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=5271)
0.6666667 = coord(2/3)
0.5 = coord(3/6)
- Abstract
- Federated search and distributed information retrieval systems provide a single user interface for searching multiple full-text search engines. They have been an active area of research for more than a decade, but in spite of their success as a research topic, they are still rare in operational environments. This article discusses a prototype federated search system developed for the U.S. government's FedStats Web portal, and the issues addressed in adapting research solutions to this operational environment. A series of experiments explore how well prior research results, parameter settings, and heuristics apply in the FedStats environment. The article concludes with a set of lessons learned from this technology transfer effort, including observations about search engine quality in the real world.
- Date
- 22. 7.2006 16:02:07
Allan, J.; Callan, J.P.; Croft, W.B.; Ballesteros, L.; Broglio, J.; Xu, J.; Shu, H.: INQUERY at TREC-5 (1997)
0.02
0.020669768 = product of:
0.0620093 = sum of:
0.04286178 = weight(_text_:retrieval in 3103) [ClassicSimilarity], result of:
0.04286178 = score(doc=3103,freq=2.0), product of:
0.12824841 = queryWeight, product of:
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.042397358 = queryNorm
0.33420905 = fieldWeight in 3103, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.024915 = idf(docFreq=5836, maxDocs=44218)
0.078125 = fieldNorm(doc=3103)
0.019147523 = product of:
0.057442565 = sum of:
0.057442565 = weight(_text_:22 in 3103) [ClassicSimilarity], result of:
0.057442565 = score(doc=3103,freq=2.0), product of:
0.14846832 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.042397358 = queryNorm
0.38690117 = fieldWeight in 3103, 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=3103)
0.33333334 = coord(1/3)
0.33333334 = coord(2/6)
- Date
- 27. 2.1999 20:55:22
- Source
- The Fifth Text Retrieval Conference (TREC-5). Ed.: E.M. Voorhees u. D.K. Harman