6Roper, S. , Dundas. N.H. , Knowledge stock, knowledge flows and innovation: Evidence from matched patents and innovation panel data [J] . Research Policy, 2015 ( 44 ) : 1327-1340.
7Wang et al. The evolving nature of China' s regional innovation system: insights from an exploration-exploitation approach [J]. Technological Forecasting & Social Change, 2015(7) :1-13.
8Ikujiro Nonaka, Noboru Konno. The concept of " Ba": building a foundation for knowledge creation [J]. California Management Review, 1998 (3) :40-53.
