[1]Qingdao University of Science and Technology Library,Qingdao 266061,China;
[2]Archives Bureau,Qingdao University of Science and Technology,Qingdao 266061,China;
[3]School of Mathematics and Physics,Qingdao University of Science and Technology,Qingdao 266061,China;
Factor analysis; Cluster analysis; Cities’innovation capabilities; Patent analysis;