| With the rapid development of new energy vehicle industry,the demand for technological innovation is increasing day by day.Innovation cooperation is an effective way for enterprises to improve their innovation level and core competitiveness,so how to carry out the strategic layout of innovation cooperation is crucial.However,it is difficult for enterprises to obtain effective innovation network resources only based on external information.Therefore,it is necessary for enterprises to understand the evolution mechanism of innovation network,so as to predict and judge the characteristics of innovation network in different development stages and provide a basis for enterprises to make scientific and reasonable cooperation strategies.In this paper,we review the relevant literatures at home and abroad and find that most complex networks show a scale-free network structure in the evolution process.This network structure is due to the growth of networks and the preference of most real networks for cooperative connections.However,there are few empirical studies on the evolution mechanism of " Preferential attachment " based on real network data.So in order to reveal more comprehensive innovation network " Preferential attachment " is how the role evolution mechanism,based on the real network data as the research object,from the overall level,the network node important level dynamic analysis preferential attachment strength evolution characteristics,and further overall level from the network,the network impact analysis on the important node " Preferential attachment " evolution mechanism of the influence factors of strength.Network layers of new nodes,three key cooperation technology,industry life cycle perspective to analyze its effect on the strength "Preferential attachment" role,the introduction of industry life cycle theory,discusses the " Preferential attachment " priority under different industry life cycle stage strength characteristics,aims to provide research perspective of general industry level.At the level of key nodes,the innovation ability of key nodes and whether the key nodes form a stable partner network are studied respectively,so as to provide further suggestions for innovation cooperation for new entrants and existing participants in the network.Finally,this paper carried out research according to the process of data preparation,global innovation network analysis,evolution characteristic analysis of the strength of innovation network " Preferential attachment ",and analysis of the influencing factors of the evolution mechanism of innovation network " Preferential attachment ".Based on the patent data of new energy vehicle industry from 2001 to 2018,combined with patent measurement,social network and other methods,the evolutionary mechanism and influencing factors of innovation network in each stage from 2001 to 2018 were empirically analyzed.Analysis results show that in the different stages of evolution,the number of new entrants than will directly affect the " Preferential attachment " for the evolution of network strength,the key technical cooperation other increase dulls " Preferential attachment " strength,the further introduction of industry life cycle theory,found that " preferential attachment" evolution mechanism for industry its strongest driving force of innovation network evolution,along with the formation of the barriers to new entrants to reduce falling,technology innovation risk factors,such as " Preferential attachment " drivers for the evolution of the innovation network effect is abate,the research object of this paper is the industry mature "preferential attachment " strength is the weakest.The results show that for important nodes with high innovation capability,the stronger the driving effect of " Preferential attachment " on their evolution is;In the process of evolution,it forms an important node in the network of knowledge followers,and " Preferential attachment " has a strong driving effect. |
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