以前的研究主要集中于宏观模型，讨论交通流量及密度的变化。
In the past, the hot point is the macroscopic model, which discusses the relationships among the traffic stream variables-speed, flow and density.
第二章主要阐述交通流的理论相关知识、当前常用的交通流量预测方法。
In the second chapter, correlative knowledge of the traffic flow theory and current traffic flow forecast methods are introduced.
观测结果显示，目前对藏羚迁移的主要干扰因素为：交通设施自身的屏障作用、人为活动、公路交通流量、未清理施工现场及未恢复植被等。
The main impacts on seasonal migration of Tibetan antelopes were physical barrier of the infrastructure, human activities, un-cleared land surface, un-recovered vegetation, traffic flow and so on.
观测结果显示，目前对藏羚迁移的主要干扰因素为：交通设施自身的屏障作用、人为活动、公路交通流量、未清理施工现场及未恢复植被等。
The main impacts on seasonal migration of Tibetan antelopes were physical barrier of the infrastructure, human activities, un-cleared land surface, un-recovered vegetation, traffic flow and so on.
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