<p>Sources: All data are from 2011, the explanation of Abbreviations as follows:</p><p>RAP: Rank of number of articles published, obtained from CNKI.</p><p>RCU: Rank of number of colleges and universities, obtained from the 2012 China City Statistical Yearbook.</p><p>RGDP: Rank of GDP, obtained from the 2012 China City Statistical Yearbook.</p><p>RPS: Rank of population size, obtained from the 2012 China City Statistical Yearbook.</p><p>RRDS: Rank of number of R&D staff, obtained from the website of the National Bureau of Statistics of China’s 2011 R&D Census Report (<a href="http://www.stats.gov.cn/tjgb/rdpcgb/index.htm" target="_blank">http://www.stats.gov.cn/tjgb/rdpcgb/index.htm</a>).</p><p>The 60 selected node cities and their rank of indicators.</p
