Houqiang Yu

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Generally speaking, citation relationship among authors can be divided into 3 types: co-citation, coupling and cross-citation. Since author co-citation analysis was first introduced in 1982, it has been widely applied to study discipline structure, research state and research trends. Afterwards, conception of author bibliographic-coupling analysis was put(More)
Context of altmetrics data is essential for further understanding value of altmetrics beyond raw counts. Mainly two facets of context are explored, the count type which reflects user’s multiple altmetrics behaviors and user category which reflects part of user’s background. Based on 5.18 records provided by Altmetric.com, both descriptive statistics and t(More)
Purpose – The purpose of this paper is to further explore the co-citation and bibliographic-coupling relationship among the core authors in the field of Chinese information science (IS), to expose research activity and author impact, and to make induction analyses about Chinese IS research patterns and theme evolution. Design/methodology/approach – The(More)
We analyse and compare the difference in discipline level of the received citations over a period of time and across fields in China by implementing the diachronous methods of bibliometrics. The citations of 896,645 papers from the Chinese Citation Database (1994 to 2013) that comprised four disciplines, namely, Philosophy, Library and Information Science(More)
Ultrasound contrast agents (UCAs) have been extensively researched in order to improve and develop new imaging techniques for clinical diagnosis in recent years. In ultrasound contrast imaging, many techniques have been proposed to improve the ratio of contrast-to-tissue (CTR). They are generally based on the nonlinear oscillation motion properties of UCAs.(More)
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