在航空货运运力分配中需要解决两个问题：一是选择哪条航段来运输货物，二是在满足货物运输的前提下，选择哪个时期运输货物。本文使用数......

The working platforms supported with multiple extensible legs must be leveled before they come into operation.Although t......

To optimize the performance of a thermoelectric device for a specific application, the device should be uniquely designe......

Because the multi-leg jacket structure is the major type of offshore structures in the Bohai Sea, the study of non-si-mu......