信息量最大化定权的城市道路重要性评价

针对城市道路重要性多指标综合评价中的指标权重确定问题，以标准差法为基础，建立了顾及评价指标间相关性的信息量最大化权重计算模型.并以武汉市路网数据为基础，以道路stroke为路网的基本结构单元，基于对偶拓扑图的几何拓扑结构表达形式，进行了实验研究与分析.结果表明：基于信息量最大化定权的道路重要性评价结果与路网的一般结构构成规律完全吻合，也很好地避免了基于单指标评价结果的片面性和相互冲突性；而且，基于信息量最大化确定的权重能随着路网结构的变化而变化，具有很好的适应性.

Evaluation of Urban Road Importance Based on the Weight Determination Method of Maximization of the Information Volume

Aiming at the determination of the weight of each index in the comprehensive evaluation of the importance of urban roads, based on the standard deviation method, the weight calculation model by maximization of the information volume is established in this paper, which takes the correlation between the evaluation indexes into account. Then, experiments are made based on Wuhan road network data, road stroke as the basic structural element, and the dual topology as the geometrical and topological expression. The results show that the evaluation result of road importance based on the maximization of information volume is in good agreement with the general structure of the road network, and the one-sided and conflicting results based on single index are well avoided. Moreover, the weight determined by the maximization of the information volume can change with the change of the network structure, so it has good adaptability.