流动商贩的空间分布特征及与正规商业的分布关系——基于距离测度方法的数量研究
张延吉, 张磊, 吴凌燕

Spatial distribution of street vending and its spatial relationship with formal commerce: Quantitative research using distance-based methods
Yanji ZHANG, Lei ZHANG, Lingyan WU
图2 北京市朝阳区正规商业的核密度分布
Fig. 2 Kernel density of formal commerce of Chaoyang District in Beijing