Generally speaking, a truck model includes three submodels of trip generation, trip distribution, and trip assignment.

卡车模型一般由出行发生、出行分布和出行分配这三个子模型组成。

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Emphasis is put on energy consumption and supply system. The model consists of five submodels and four hierarchical levels.

该模型的重点是放在能源消费与供应系统，该模型体系是由四个层次和五个子模型组成。

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The kernel of the converter blowing procedure control is the blowing endpoint control model which is made up of three submodels.

转炉炼钢过程控制的核心是吹炼终点控制模型，该模型又由三个子模型组成。

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