The supply and demand of traffic volume are discussed, some problems of transportation system and their mathematic models are studied.
阐述了交通运输需求与供给行为的理论，并研究了交通运输结构系统和数学模型。
Entropy maximization approach has been widely used in transportation planning. It provides theoretical basis for a class of forecast models on traffic demand.
熵最大化方法被广泛应用于交通规划，为交通需求预测模型提供了理论依据。
The application of combined models for traffic demand forecasting is analyzed, and emphasis is put on two combined models applied to demand forecasting for urban traffic.
分析了交通需求预测组合模型的应用，重点研究了适用于城市交通需求预测的两种组合模型。
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