Avrahami, T.T.; Yau, L.; Si, L.; Callan, J.P.: ¬The FedLemur project : Federated search in the real world (2006)
0.01
0.010286495 = product of:
0.030859483 = sum of:
0.013115887 = weight(_text_:in in 5271) [ClassicSimilarity], result of:
0.013115887 = score(doc=5271,freq=12.0), product of:
0.059380736 = queryWeight, product of:
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.043654136 = queryNorm
0.22087781 = fieldWeight in 5271, product of:
3.4641016 = tf(freq=12.0), with freq of:
12.0 = termFreq=12.0
1.3602545 = idf(docFreq=30841, maxDocs=44218)
0.046875 = fieldNorm(doc=5271)
0.017743597 = product of:
0.035487194 = sum of:
0.035487194 = weight(_text_:22 in 5271) [ClassicSimilarity], result of:
0.035487194 = score(doc=5271,freq=2.0), product of:
0.15286934 = queryWeight, product of:
3.5018296 = idf(docFreq=3622, maxDocs=44218)
0.043654136 = 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)
0.5 = coord(1/2)
0.33333334 = coord(2/6)
- 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
