Over the past 50 years researchers have made little progress in developing a general theory of traffic flow.
在过去的半个世纪里，研究人员在形成车流宏观理论方面鲜有进步。
A general expression of seasonal ARIMA models with one periodicity is given, and procedures to model and predict traffic flow using seasonal ARIMA models are provided.
介绍了具有周期的季节ARIMA模型的一般表达方式，并提供了使用这一模型进行建模和预报的一般过程。
A vessel shall, so far as practicable, avoid crossing traffic lanes but if obliged to do so shall cross on a heading as nearly as practicable at right angles to the general direction of traffic flow.
船舶应尽可避免穿越通航分道，但如不得不穿越时，应尽可能用与分道的船舶总流向成直角的航向穿越。
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