关键词: 距离约束, 出租车客流网络, 复杂网络, 结构特征

Abstract: By analyzing the floating taxi trajectory data, the existence of distance constraint in taxi passenger flow is found. Flow evolution model considering distance constraint is proposed and networks for different constraint parameters are simulated and compared. The results indicate that the distance constraint contributes to a “cut-off” of degree distribution, weight strength distribution, distance strength distribution, and a shorter distance constraint leads a more pronounced “cut-off”. With the decrease of constrained distance, the decaying rate of edge weight distribution slows down. Both degree-weight strength correlation and degree-distance strength correlation are power-law relations, and the exponents increase with the decrease of constrained distance. As the constrained distance decrease, the assortative mixing for weight strength of nodes changes from negligible negative correlation to positive correlation. These results help to reveal the effecting principles of the distance constraint of population travels on the structure of taxi passenger flow network.

Key words: distance constraint, taxi passenger flow network, complex network, structural properties