Research Article
Forecasting CO2 Emissions in China’s Construction Industry Based on the Weighted Adaboost-ENN Model and Scenario Analysis
Table 9
Definition of annual variation rates of policy variables under different scenarios (%).
| | Policy variable | HS | BS | LS |
| | Population | 0.51(2017-2030) | 0.54(2017-2020) | 0.37(2017-2030) | | 0.39(2021-2030) | | GDP per capita | 8.06(2017-2020) | 6.50(2017-2020) | 6.18(2017-2020) | | 7.66(2021-2030) | 6.18(2021-2030) | 5.87(2021-2030) | | Direct energy intensity | -4.73(2017-2030) | -5.44(2017-2030) | -5.71(2017-2030) | | Indirect carbon intensity | -3.30(2017-2030) | -3.89(2017-2030) | -4.09(2017-2030) | | Coal energy structure | -1.01(2017-2030) | -1.32(2017-2020) | -1.39(2017-2020) | | -1.18(2021-2030) | -1.24(2021-2030) |
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