Research Article
Environmental Impact Analysis of Hub-and-Spoke Network Operation
Table 5
Arrangements of hub-and-spoke network.
| | h2 = 1 | h5 = 1 | x1222 = 1 |
| | x1322 = 1 | x1455 = 1 | x1525 = 1 | | x1622 = 1 | x2322 = 1 | x2455 = 1 | | x2525 = 1 | x2622 = 1 | x3455 = 1 | | x3525 = 1 | x3622 = 1 | x3655 = 1 | | x4555 = 1 | x4655 = 1 | x5655 = 1 |
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