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。
The characteristics of different traffic models that exist in the incity and interurban traffic systems respectively are researched and the calculation models of urban traffic demand are put forward.
再通过研究城市市内交通、过境交通及对外交通中各种交通方式的特点，提出城市交通需求的计算模型；
The characteristics of different traffic models that exist in the incity and interurban traffic systems respectively are researched and the calculation models of urban traffic demand are put forward.
再通过研究城市市内交通、过境交通及对外交通中各种交通方式的特点，提出城市交通需求的计算模型；
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