Table 9.
Hierarchical decomposition of influencing factors
| The hierarchy | Elements |
|---|---|
| A1 (top floor) | T5,T10,T11,T13 |
| A2 layer | T1,T2,T3,T4,T6,T7,T12 |
| A3 layer | T8,T15,T19 |
| A4 layer | T9,T20 |
| A5 (bottom) | T14,T16,T17,T18, |
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