Research on patentee cooperation network between enterprises based on electronic information industry

Abstract

The paper taked electronic information industry in china as research objects. We collected data from China Intellectual Property (CNIPR), and built an evolution of cooperation network model, according to patentee cooperation between enterprises from 2005 to 2012. Research showed that the node degree distribution basically conforms to power law distribution with a scale-free nature. In this paper defined a cumulative error function with Kolmogorov-Smirnov (KS) statistics, and the result indicated that shifted power law distribution is more in line with real data, which correspond to different time spans. From the visualization of the evolution network, some key nodes, which located in the important position of the network, can be found. Besides two interesting phenomenon appeared: uneven increasing of clusters size and clusters aggregation. © 2014 Springer International Publishing.