城市夜间灯光强度空间衰减规律及应用
郑沐辰, 许刚, 肖锐, 焦利民

Distance decay of nighttime lights from urban centers and its application
ZHENG Muchen, XU Gang, XIAO Rui, JIAO Limin
图4 反S函数图像
Fig.4 The inversed-S function