中文摘要：

以河南省18个省辖市的综合实力为权重，从综合影响的角度运用加权Voronoi图分析河南省1991--2010年间城市空间影响力的空间格局及演变。结果表明：在河南省中北部地区，城市分布密集，形成了以郑州为中心的经济较发达地区，且20年来郑州的城市影响空间在不断扩大；和郑州邻近的开封、新乡、焦作、洛阳等城市的影响空间在缩小；南部的南阳、信阳、周口由于发展较慢，城市影响空间也在缩小；北部的安阳、濮阳、鹤壁基本保持不变。

英文摘要：

Taking the overall strength of 18 provincial cities in Henan Province as the weights, from the per- spective of the combined effects, analyze the spatial pattern and evolution of spatial influences of the cities in Henan Province since 1991 which used weighted Voronoi diagram. The results show that cities are concentrated in the north-central region of Henan Province, and formed the more developed regions around Zhengzhou. The past two decades, the impact of space in Zhengzhou is expanding, the impacts of space in Kaifeng, Xinxiang, Jiaozuo, Luoyang that neighboring Zhengzhou is narrowing. Because of the slow development, the impacts of space in Nan- yang, Xinyang, Zhoukou which located in the southern is also narrowing, and the impacts of space remain un- changed in Anyang, Puyang, Hebi which located in Northern.