31 citations
2 papers
cs.DL2015★ 7 cited
The Normalization of Occurrence and Co-occurrence Matrices in Bibliometrics using Cosine Similarities and Ochiai Coefficients
Qiuju Zhou, Loet Leydesdorff
We prove that Ochiai similarity of the co-occurrence matrix is equal to cosine similarity in the underlying occurrence matrix. Neither the cosine nor the Pearson correlation should…
cs.DL2014★ 31 cited
The Role of Chinese-American Scientists in China-US Scientific Collaboration: A Study in Nanotechnology
Xianwen Wang, Shenmeng Xu, Di Liu +1
In this paper, we use bibliometric methods and social network analysis to analyze the pattern of China-US scientific collaboration on individual level in nanotechnology. Results sh…