贵州省县域"三生空间"功能效率时空特征与动态解耦过程OA

This paper reveals the spatial and temporal variation and dynamic decoupling process of the functional efficiency of the"production-living-ecological"of counties in Guizhou province,and provides theoretical support for the spatial planning layout of counties.Using 88 county units in Guizhou province as the research object and the period 2000-2020 as the investigation period,the spatial and temporal characteristics of functional efficiency are analyzed by using PLS-SEM model,GA-BP neural network and dynamic change index,and the decoupling process of the two systems is studied dynamically utilizing decoupling analysis model.The results show that:(1)Spatially,the functional efficiency of the production spatial is distributed in a north-east-south-west axis.The ecological space has no prominent spatial distribution characteristics.(2)In time,Ziyun and Zhenyuan show a lower starting point but faster development,while the other county units do not change much.Changes in the functional efficiency of ecological spatial do not show a significant spatial distribution pattern,but the units under Bijie and Qiandongnan are more variable.(3)Most units of the two systems show a shift from expansive coupling to a state of solid decoupling from 2000 to 2020,with the advantage of spatial use shifting from production space to ecological space and the decoupling relationship tending to develop in a benign direction.