Version 1.6.4 of VOSviewer has been released and is available at www.vosviewer.com . In addition to a number of minor improvements and some bug fixes, this version includes the following new features and enhancements:(除了一些小的改进和bug修复外,这个版本还增加了一些新的功能) Citation networks. Functionality has been added for creating direct citation networks based on Web of Science and Scopus files. (引文网络:可以处理Wos,Scopus文档,生成直接引文网络) Keyword co-occurrence networks. Functionality has been added for creating keyword co-occurrence networks based on Web of Science, Scopus, and PubMed files.(关键词共现网络:可以基于 Wos,Scopus、PubMed文档生成关键词共现网络 ) Support for RIS files. Functionality has been added for creating co-authorship, keyword co-occurrence, and term co-occurrence networks based on RIS files. The RIS file format is supported by for instance Mendeley, BibSonomy, Zotero, and Publish or Perish.(支持RIS文档格式:基于RIS文档生成作者合作、关键词共现、术语共现网络。RIS文档可以来源于: Mendeley, BibSonomy, Zotero, and Publish or Perish ) Automatic layout parameters. When creating a new map, the parameters of the layout technique can automatically be set to appropriate values.(自动布局参数。当生成一个新的图形时,布局参数能够生成生成准确的参数值) Improved user interface. A number of user interface improvements have been made.(改善了用户界面:用户界面有了一系列改进。) 利用软件下载时自带的示例文档,得到了以下图形: 图1 期刊引用网络图(已聚类,点的大小与被引次数大小相关;颜色代表其属于哪一个聚类;连线的粗细代表期刊归一化或不归一化的链接强度) 图2 期刊引用网络图(点的大小与被引次数相关;点的颜色根据其SCORE变化,SCORE大小指期刊的影响因子) item密度可视化 期刊密度可视化 其它功能暂时还没有尝试