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Short-term traffic flow prediction received considerations from different fields, because of its essentialness in traffic engineering and its theoretical difficulties. In this paper, we studied two important approaches of traffic flow prediction: detrending methods and multi-regime methods. First, we compared their differences in modeling philosophy and(More)
In this paper, an improved measurement method of ultrasonic is researched in the field of the dynamic three-dimensional positioning system, which improves greatly the accuracy and performance of measurement system. Special high-frequency timer chip and automatic gain control module are adopted into the system to further improve the accuracy of received(More)
The missing data problem exists in a lot of transportation systems while many traffic applications require accurate traffic data to work well. So, various methods were proposed for traffic data imputation in recent years. However, most of these approaches only consider the information of a single detector. In this paper, we use the temporal and spatial(More)
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