citation entropy
Citation entropy (also known as the s- index) attempts to characterize the quality and impact of scientific researchusing an entropy model. It is calculated as
$$s=\frac{1}{4}\sqrt{C^P}e^{H^*},$$where H* is the standardized Shannon entropy or
$$H^*=-\sum\limits_{i=1}^{P}{\left(\frac{C_i}{C^P}\log_2\frac{C_i}{C^P}\right)}.$$History
Year | s |
---|---|
1997 | 0.5206 |
1998 | 1.8675 |
1999 | 3.1997 |
2000 | 4.1346 |
2001 | 5.8422 |
2002 | 8.4114 |
2003 | 10.7256 |
2004 | 13.8663 |
2005 | 16.5289 |
2006 | 20.1724 |
2007 | 23.1378 |
2008 | 26.0488 |
2009 | 28.5618 |
2010 | 31.3155 |
2011 | 34.5960 |
2012 | 37.6845 |
2013 | 40.1894 |
2014 | 42.5891 |
2015 | 44.9023 |
2016 | 46.9958 |
2017 | 48.8715 |
2018 | 50.4145 |
2019 | 52.3057 |
2020 | 54.2599 |
2021 | 56.2080 |
2022 | 57.4745 |
2023 | 59.0108 |
2024 | 59.1381 |
References
- Silagadze, Z.K. (2009) Citation entropy and research impact estimation. ArXiv:physics 0905.1039v2:1-7.