The four stage method and a double gravity model were used to forecast the OD(origin-destination) distribution of air traffic flow in the whole airspace of China.

基于四阶段法，采用双重力模型，预测全国空域的交通流量OD分布。

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The four stage method and a double gravity model were used to forecast the OD(origin-destination) distribution of air traffic flow in the whole airspace of China.

基于四阶段法，采用双重力模型，预测全国空域的交通流量OD分布。

youdao