介绍了快速货运中各种轴辐式网络及其特点，总结了轴辐式网络问题的研究现状，并对其研究趋势做出了分析。

The paper introduces all kinds of hub-and-spoke networks and their characteristics in express freight, describes the current situation of their research and analyzes their research trend.

youdao

三大航空集团的网络从单一枢纽为主向多枢纽转变，轴辐式结构更加明晰；

The networks of the "Big Three" are now shifting from single hub to multi-hubs and the adoption of hub-and-spoke structure becomes more obvious.

youdao

三大航空集团的网络从单一枢纽为主向多枢纽转变，轴辐式结构更加明晰；

The networks of the "Big Three" are now shifting from single hub to multi-hubs and the adoption of hub-and-spoke structure becomes more obvious.

youdao