Evolution Characteristics of Advanced Nonferrous Metal Industry Patent Cooperation Network in China from the Perspective of Multilayer Network

The advanced nonferrous metal industry is a national strategic emerging industry, and its innovation ability crucial to the transformation development of downstream industries such as aerospace, rail transit, electronic information, automobiles high end industrial value chain. research on evolution characteristics cooperative network beneficial mechanism improving capability industry. Based invention patent application data in 2002–2020, using social analysis method Gephi 0.9.2 visualization construct cooperation knowledge network, this paper analyzes overall law It found that, first, structure China’s metals becoming more complex. scale increasing, small world obvious. Second, some subjects, key nodes, play role “bridge” grasp general direction technology. nodes has changed, industry-university-research gradually evolved from enterprise-led university-led. Third, number technical categories increased depth technology been enhanced field. Hot fields are characterized by intensity, wide range, stable advancement. findings, suggestions enlightenment put forward promote