Table 8. Hierarchical structure analysis results of two approaches.
| Layer | L1 | L2 | L3 | L4 | L5 | L6 | L7 |
|---|---|---|---|---|---|---|---|
| Novel approach | 6,7 | 4,5,15 | 8,11,14 | 3,12 | 9,10,13 | 2 | 1 |
| Traditional approach | 4,6,7,12 | 5,8,11,14 | 3,15 | 9,10,13 | 1,2 |
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