Research Article
[Retracted] Analysis on the Development of Smart City of Big Cities in China and Its Effect to Economic Structure Based on Entropy Method
| | Primary index | Secondary index |
| | Infrastructure | Number of mobile phones X1 | | Number of broadband access users X2 | | Urban road area X3 | | Length of drainage pipe X4 |
| | S & T innovation | R&D personnel X5 | | Number of patent applications X6 | | Number of patents authorized X7 |
| | Smart economy | Per capita GDP X8 | | GDP growth rate X9 | | Total import and export of goods X10 | | Number of large-scale industrial enterprises X11 | | Total corporate profits X12 | | Number of employments X13 |
| | Humanistic service | Number of higher institutions X14 | | Number of hospitals X15 | | Number of museums X16 | | Education expenditure X17 | | Cultural institutions X18 | | Number of insured persons with urban workers’ pension insurance X19 | | Number of insured urban employees X20 |
| | Intelligent environment | Green space area X21 | | Industrial wastewater discharge X22 | | Total industrial waste gas emission X23 | | Concentration of inhalable fine particles X24 |
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