The model overcomes the unpredictability due to monotonicity and periodical fluctuation of freight volume. 该模型克服了货运量的单调性和周期波动性给预测带来的困难。
It was proved that the continuity and strict monotonicity of mappings in the variational model ensure the existence and uniqueness of equilibrium flows, respectively. 证明了变分模型中映射的连续性及严格单调性可分别保证均衡流量的存在性和唯一性。
