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Table 1
Example of values for the free parameters of the function 
.
| Parameter | Example value |
|
|
|
| a1 | 10 |
| a2 | 26 |
| a3 | 0.17 |
| a4 | 3 |
| a5 | 5 |
| a6 | 0.23 |
| a7 | 50 |
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