The structure and evolution of the doped nanomaterials research between 1997 and 2012 are analyzed in this paper by usin......

　　Exploring causal relationships in complex phenomena is one of the main purpose of science....

　　In many application domains, we encounter data which involves a graph encoding certain relationships and a set of it......

目的从文献分析角度把握国外重症医学主要研究内容，为国内开展重症医学研究提供借鉴。方法采用双向聚类的文献计量分析方法，通过检索......

目的分析呼吸机相关性肺炎（VAP）相关文献的分布特点和研究热点。方法以中国生物医学文献数据库为数据源，对建库至2017年12月发布的VAP......