| 检验变量 | 检验类型 | ADF检验值 | 临界值 | 结论 | ||
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| ||||
| EG | Intercept | −2.94376 | −3.654 | −2.957 | −2.617 | 不平稳 |
| ΔEG | None | −6.65383 | −2.642 | −1.952 | −1.610 | ***平稳 |
| ECG | None | −1.45514 | −2.642 | −1.952 | −1.610 | 不平稳 |
| ΔECG | Intercept | −4.29795 | −3.662 | −2.960 | −2.619 | ***平稳 |