西安市物流企业空间格局演化及影响因素分析

借助西安市物流企业微观地理数据，采用平均最近邻、标准差椭圆和核密度估计描述1995—2019年西安市物流企业空间分布及其演化特征，采用统计学方法分析物流企业聚集区与市中心的距离关系，并构建最小二乘回归模型分析影响物流企业空间分布的主要因素。结果表明：西安市物流企业从2000年开始出现聚集趋势，逐渐从单核发展为双核，现有出现第三核的趋势；物流企业空间分布呈现明显的扩散特征，演化过程沿着“西南-东北”方向延伸，整体呈现出“郊区化”趋势，集中分布于距市中心15km左右的位置；上一年度物流企业数量、常住人口及社会消费品零售总额是影响西安市物流企业空间格局形成的主要因素，对物流企业布局和集聚具有积极作用。

Spatial evolution and influencing factors of logistics enterprises in Xi'an

Based on the micro geographic data of logistics enterprises in Xi'an, the spatial distribution and evolution characteristics of logistics enterprises in Xi'an from 1995 to 2019 are described by using the estimation of average nearest neighbor, standard deviation ellipse and kernel density. The distance relationship between logistics enterprises cluster area and city center is analyzed by using statistical method, and the main factors affecting the spatial distribution of logistics enterprises are analyzed by constructing the least square regression model. The results show that: the logistics enterprises in Xi'an have the trend of aggregation since 2000, and gradually develop from single core to dual core, and the third core is now emerging; the spatial distribution of logistics enterprises shows the obvious diffusion characteristics, and the evolution process extends along the direction of "Southwest-northeast", and the overall trend of "suburbanization" appears, concentrated in the location about 15km away from the city center; The number of logistics enterprises, resident population and total retail sales of social consumer goods in the last year are the main factors that affect the formation of spatial pattern of logistics enterprises in Xi'an, which have a positive effect on the layout and agglomeration of logistics enterprises.