基于投影寻踪模型的河南城市化水平综合评价

在构建城市化综合评价指标体系的基础上,以河南省2001—2010年各地市单元为数据样本,引入投影寻踪综合评价模型将多维评价指标投影为一维投影数据,采用加速遗传算法优化投影指标函数寻求最佳投影方向,根据投影值的大小对河南省各地市城市化水平进行比较分析。研究表明：近10年来河南省各地市城市化水平均获得了不同程度的提升,尽管地区间城市化水平区域差异有所减缓,但两极分化趋势依然显著,以郑州为中心的中原城市群地区是河南省城市化进程的核心区,豫西北部地市高于豫东南部地市,加快推进豫东、豫东南部传统农区的城市化进程是实现河南地区间城市化水平协调发展的关键。

Evaluation of the Urbanization Level in Henan Based on Projection Pursuit Cluster Model

In order to avoid subjectivity and incapable of dealing with high dimensional dataset arise from conventional methods,this paper proposed a new methodology based on Projection Pursuit Model(PPM) to evaluate the level of urbanization process.Based on the urbanization connotation,an indicator system was built according to 5 separate sub-systems that contain population urbanization,economy urbanization,society urbanization,landscape urbanization and environment urbanization.With the samples of every city’s quantitative data from 2001 to 2010 in Henan,the multi-dimension values of evaluation index were synthesized into one dimension projection data,accelerate genetic algorithm was introduced to optimize the function and seek the optimum projection vector,the projection value was got to measure the level of urbanization in Henan province.Results show that the synthetic urbanization level of every city has been enhanced continuously since 2001;although the disparity of regional urbanization level has been slowed down gradually,and the polarization trend in was also remarkable in Henan.Central plain urban agglomeration constituted the core areas of urbanization process,and the urbanization level of the northwest is higher than the southeast.And at last,it is suggested that great effort should be made to promote urbanization process in traditional agricultural areas in the east and southeast Henan,which will play a key role in coordinating regional urbanization development.