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 | 1.9534 |
| 1999 | 3.2592 |
| 2000 | 4.4833 |
| 2001 | 5.7698 |
| 2002 | 8.1380 |
| 2003 | 10.4349 |
| 2004 | 13.6539 |
| 2005 | 16.4398 |
| 2006 | 20.1534 |
| 2007 | 23.1254 |
| 2008 | 26.1170 |
| 2009 | 28.6429 |
| 2010 | 31.4243 |
| 2011 | 34.7213 |
| 2012 | 37.8799 |
| 2013 | 40.4126 |
| 2014 | 42.8224 |
| 2015 | 45.1570 |
| 2016 | 47.2672 |
| 2017 | 49.1765 |
| 2018 | 50.7299 |
| 2019 | 52.6349 |
| 2020 | 54.5966 |
| 2021 | 56.5846 |
| 2022 | 57.8672 |
| 2023 | 59.3943 |
| 2024 | 60.6781 |
References
- Silagadze, Z.K. (2009) Citation entropy and research impact estimation. ArXiv:physics 0905.1039v2:1-7.