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定义时空对象代替空间对象作为基本研究单元, 改进传统Moran's I指数为时空Moran's I指数, 以便适于分析道路交通的时空特性; 通过Moran散点图给出时空自相关意义下的交通流时空状态特征分类: 拥堵聚集、畅通聚集、拥堵异质和畅通异质.为说明改进时空Moran's I指数分析法的实际应用价值, 以北京市二环快速路外环方向的车流速度数据为例, 进行时空自相关指标计算, 并从全局与局部自相关两个方面分析时 空自相关指标所反映的交通状态时空分布与演化规律.
关键词:
I指数')" href="#">改进Moran's I指数
交通状态
时空自相关
时空分布 相似文献
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According to the deficiencies in Watts and Strogatz's small-world network model, we present a new regular model to establish the small-world network. Besides the property of the small-world, this model has other properties such as accuracy in controlling the average shortest path length L, and the average clustering coefficient C, also regular network topology as well as enhanced network robustness. This method improves the construction of the small-world network essentially, so that the regular small-world network closely resembles the actual network. We also present studies on the relationships among the quantities of a variety of edges, L and C in regular small-world network in detail, This research lays the foundation for the establishment of the regular small-world network and acts as a good guidance for further research of this model and its applications. 相似文献
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In this paper, we propose a new cellular automaton (CA) model for train
movement simulations under mixed traffic conditions. A kind of control
strategy is employed for trains to reduce energy consumption. In the
proposed CA model, the driver controls the train movements by using some
updated rules. In order to obtain a good insight into the evolution
behaviours of the rail traffic flow, we investigate the space--time diagram
of the rail traffic flow and the trajectories of the train movements. The
numerical simulation results demonstrate that the proposed CA model can well
describe the dynamic behaviours of the train movements. Some complex
phenomena of train movements can be reproduced, such as the train delay
propagations, etc. 相似文献
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