Open Access
Table 3
When 
, force coefficient interval distribution.
| Machine type | Test type | ε Distribution probability | Probability decline | δ Distribution probability | Probability decline |
|---|---|---|---|---|---|
| Machine 1 | Loose soil surface | 47.1% | –34.2% | 64.9% | –14.9% |
| Normal soil surface | 36.3% | –43.3% | 37.4% | –42.0% | |
| Hard soil surface | 41.5% | –38.7% | 52.5% | –28.0% | |
| 1M digging | 39.6% | –40.4% | 54.0% | –31.5% | |
| 2M digging | 56.7% | –25.6% | 55.6% | –24.7% | |
| Machine 2 | Hard soil surface | 31.7% | –48.0% | 41.9% | –38.9% |
| 1M digging | 33.1% | –47.3% | 45.4% | –35.2% | |
| 2M digging | 36.0% | –47.8% | 49.6% | –30.8% |
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