Table 5 Central composite design (coded factors)
From: Optimizing nanoparticle attributes for enhanced anti-wear performance in nano-lubricants
Std. order | Run order | Blocks | Factors | |
|---|---|---|---|---|
H | C | |||
1 | 6 | 1 |  − 1 |  − 1 |
2 | 2 | 1 | 1 |  − 1 |
3 | 5 | 1 |  − 1 | 1 |
4 | 1 | 1 | 1 | 1 |
5 | 7 | 1 | 0 | 0 |
6 | 3 | 1 | 0 | 0 |
7 | 4 | 1 | 0 | 0 |
8 | 9 | 2 |  − 1 | 0 |
9 | 13 | 2 | 1 | 0 |
10 | 10 | 2 | 0 |  − 1 |
11 | 12 | 2 | 0 | 1 |
12 | 11 | 2 | 0 | 0 |
13 | 14 | 2 | 0 | 0 |
14 | 8 | 2 | 0 | 0 |