中国旅游业绿色发展效率时空演变特征及影响机理 |
刘雨婧, 唐健雄 |
Spatio-temporal evolution characteristics and influencing mechanism of green development efficiency of tourism industry in China |
LIU Yu-jing, TANG Jian-xiong |
图5 2008—2018年中国旅游业绿色发展效率核密度估计 |
Fig. 5 The kernel density estimation of TGDE in China from 2008 to 2018 |
![]() |