-
Shi, D.; Rousseau, R.; Yang, L.; Li, J.: ¬A journal's impact factor is influenced by changes in publication delays of citing journals (2017)
0.02
0.020488268 = product of:
0.05122067 = sum of:
0.029493032 = weight(_text_:u in 3441) [ClassicSimilarity], result of:
0.029493032 = score(doc=3441,freq=2.0), product of:
0.13587062 = queryWeight, product of:
3.2744443 = idf(docFreq=4547, maxDocs=44218)
0.041494254 = queryNorm
0.21706703 = fieldWeight in 3441, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.2744443 = idf(docFreq=4547, maxDocs=44218)
0.046875 = fieldNorm(doc=3441)
0.02172764 = product of:
0.04345528 = sum of:
0.04345528 = weight(_text_:l in 3441) [ClassicSimilarity], result of:
0.04345528 = score(doc=3441,freq=2.0), product of:
0.16492525 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.041494254 = queryNorm
0.26348472 = fieldWeight in 3441, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.046875 = fieldNorm(doc=3441)
0.5 = coord(1/2)
0.4 = coord(2/5)
- Abstract
- In this article we describe another problem with journal impact factors by showing that one journal's impact factor is dependent on other journals' publication delays. The proposed theoretical model predicts a monotonically decreasing function of the impact factor as a function of publication delay, on condition that the citation curve of the journal is monotone increasing during the publication window used in the calculation of the journal impact factor; otherwise, this function has a reversed U shape. Our findings based on simulations are verified by examining three journals in the information sciences: the Journal of Informetrics, Scientometrics, and the Journal of the Association for Information Science and Technology.
-
Xu, Y.(C.); Tan, C.Y.(B.); Yang, L.: Who will you ask? : an empirical study of interpersonal task information seeking (2006)
0.00
0.0043455283 = product of:
0.02172764 = sum of:
0.02172764 = product of:
0.04345528 = sum of:
0.04345528 = weight(_text_:l in 6099) [ClassicSimilarity], result of:
0.04345528 = score(doc=6099,freq=2.0), product of:
0.16492525 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.041494254 = queryNorm
0.26348472 = fieldWeight in 6099, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.046875 = fieldNorm(doc=6099)
0.5 = coord(1/2)
0.2 = coord(1/5)
-
Yang, L.; Ji, D.; Leong, M.: Document reranking by term distribution and maximal marginal relevance for chinese information retrieval (2007)
0.00
0.0043455283 = product of:
0.02172764 = sum of:
0.02172764 = product of:
0.04345528 = sum of:
0.04345528 = weight(_text_:l in 907) [ClassicSimilarity], result of:
0.04345528 = score(doc=907,freq=2.0), product of:
0.16492525 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.041494254 = queryNorm
0.26348472 = fieldWeight in 907, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.046875 = fieldNorm(doc=907)
0.5 = coord(1/2)
0.2 = coord(1/5)
-
Wu, Y.; Yang, L.: Construction and evaluation of an oil spill semantic relation taxonomy for supporting knowledge discovery (2015)
0.00
0.0043455283 = product of:
0.02172764 = sum of:
0.02172764 = product of:
0.04345528 = sum of:
0.04345528 = weight(_text_:l in 2202) [ClassicSimilarity], result of:
0.04345528 = score(doc=2202,freq=2.0), product of:
0.16492525 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.041494254 = queryNorm
0.26348472 = fieldWeight in 2202, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.046875 = fieldNorm(doc=2202)
0.5 = coord(1/2)
0.2 = coord(1/5)
-
Yang, L.; Wu, Y.: Creating a taxonomy of earth-quake disaster response and recovery for online earthquake information management (2019)
0.00
0.0036212734 = product of:
0.018106367 = sum of:
0.018106367 = product of:
0.036212735 = sum of:
0.036212735 = weight(_text_:l in 5231) [ClassicSimilarity], result of:
0.036212735 = score(doc=5231,freq=2.0), product of:
0.16492525 = queryWeight, product of:
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.041494254 = queryNorm
0.2195706 = fieldWeight in 5231, product of:
1.4142135 = tf(freq=2.0), with freq of:
2.0 = termFreq=2.0
3.9746525 = idf(docFreq=2257, maxDocs=44218)
0.0390625 = fieldNorm(doc=5231)
0.5 = coord(1/2)
0.2 = coord(1/5)