中国人口疏密区分界线的历史变迁及数学拟合与地理意义

龚胜生,陈云

The historical change, mathematical fitting and geographical significance of demographic borderlines in China

GONG Shengsheng,CHEN Yun

图4 中国人口疏密区分界线两侧地形、气温、降水、城市的分异

Fig. 4 The topography, temperature, precipitation and urban differentiation between the northwest and southeast sides of China's demographic borderline