The Ideal, Evolution and Trend of "Science of Science"
(1. National Academy of Innovation Strategy, CAST, Beijing 100038, China; 2. Chinese Academy of Science and Technology for Development, Beijing 100038, China; 3. School of Social Sciences, Tsinghua University, Beijing 100084, China; 4. Center of Science, Technology and Society, Tsinghua University, Beijing 100084, China)
