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The purpose of the present study is to investigate the presence of
multi-fractal behaviours in the traffic time series not only by
statistical approaches but also by geometrical approaches. The
pointwise H\"{o} lder exponent of a function is calculated by
developing an algorithm for the numerical evaluation of H\"{o} lder
exponent of time series. The traffic time series observed on the
Beijing Yuquanying highway are analysed. The results from all these
methods indicate that the traffic data exhibit the multi-fractal
behaviour. 相似文献
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智能运输系统综合效益评价指标体系及模糊综合评价 总被引:7,自引:0,他引:7
首先论述了智能运输系统 (ITS)效益综合评价的目的和意义 ,然后构建了相应的评价指标体系 .给出了综合效益评价方法和评价模型 ,运用二元比较法确定各指标的权重 ,最后进行了实例分析 . 相似文献
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