摘要
为确定基于统计预测的交通事件检测门槛值,利用统计原理,可建立无事件和事件发生情况下,上游和下游交通流占有率的预测误差分布图和相应的密度函数,由此可得到不同置信水平和判定准则下的检测效率变化情况。
In this paper, prediction error distribution diagram and corresponding density function of upstream and downstream traffic occupancy are analyzed by statistics theory whether there are accidents or not in order to identify the threshold of accident detection based on statistical prediction. According to the charts and statistical data, the variation law of detection efficiency is deduced under different confidence levels and determine criterions.
出处
《交通标准化》
2008年第7期84-87,共4页
Communications Standardization
基金
四川省交通科技基金(2003.3-7-10)
关键词
交通工程
事件检测
统计预测
门槛值
置信水平
traffic engineering
accident detection
statistical prediction
threshold
confidence level
