Rank | High-frequency keywords | Frequency of occurrence | First year | Rank | Highly Centralized Keywords | Centrality | First year |
1 | Research evaluation | 188 | 1998 | 1 | Research evaluation | 0.45 | 1998 |
2 | Technology Evaluation | 111 | 2001 | 2 | Technology Evaluation | 0.42 | 2001 |
3 | Science and S& T Assessment t | 56 | 1999 | 3 | S& T Assessment | 0.18 | 1999 |
4 | h index | 14 | 2009 | 4 | SCI | 0.14 | 2002 |
5 | Bibliometrics | 9 | 2008 | 5 | Academic evaluation | 0.13 | 2014 |
6 | Colleges | 7 | 2007 | 6 | Colleges | 0.10 | 2007 |
7 | Academic journals | 5 | 2010 | 7 | regression analysis | 0.08 | 2010 |
8 | Technology Management | 5 | 2006 | 8 | Impact factor | 0.06 | 2003 |
9 | Peer review | 4 | 2011 | 9 | Bibliometrics | 0.05 | 2008 |
10 | Impact factor | 4 | 2003 | 10 | Scientific Paper Index | 0.05 | 2003 |