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- W3204081867 abstract "• H02J/G01R/H04L/G06Q/H04W are the top 5 research hotspots of smart grid patent technologies in China. • China's smart grid innovation in circuit devices or systems for power supply or distribution and energy storage system is far ahead of other countries. • The average NNI of innovation space is less than 0.1 in 2009–2012 and 2013–2016 and exceeds 0.1 during 2017–2020. • Smart grid innovation space has obvious agglomeration characteristics, but the diffusion effect has initially appeared. • The spatial differentiation of patents during 2009–2012, 2013–2016, and 2017–2020 was presented. Based on the perspective of smart grid patent, this study crawls the smart grid patent data from 2009 to 2020, and extracts the hotspots of innovation space in different stages. By mining the patent information, this paper identifies the hot innovation fields of smart grid in China and the world, and selects IPC classifications of H02J, G01R and H04L as the main hot smart grid technologies for innovation space analysis. In further study, methods such as global autocorrelation analysis are used to comprehensively analyze the spatial distribution of smart grid innovation in China. It is found that innovation activities of China's smart grid industry are spatially agglomerated. However, during 2017–2020, such spatial distribution represents China's smart grid industry has approached the distribution pattern of normal innovation industries which tends to be discrete or competitive. According to autocorrelation analysis, China's smart grid innovation space has obvious agglomeration characteristics, showing a gradual decline trend from the center to the periphery, and the diffusion effect has initially appeared. Finally, the smart grid patent statistics and the spatial ellipse parameters intuitively present the innovation characteristics of China's smart grid industry in terms of the evolution of the spatial differentiation during 2009–2012, 2013–2016, and 2017–2020." @default.
- W3204081867 created "2021-10-11" @default.
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- W3204081867 date "2021-11-01" @default.
- W3204081867 modified "2023-10-13" @default.
- W3204081867 title "Industrial innovation characteristics and spatial differentiation of smart grid technology in China based on patent mining" @default.
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- W3204081867 doi "https://doi.org/10.1016/j.est.2021.103289" @default.
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