全局主成分法在土地集约利用评价中应用——以中部地区为例

在构建评价指标体系基础上,运用基于三维立体时序全局表的全局主成分法对1997￣2005年东部、中部、西部、东北地区原始数据进行分析,对比分析得出中国中部地区的土地集约利用水平变化规律。结果表明:全局主成分法的适用性广;近9年来中部地区土地集约利用水平在不断提高;中部地区土地集约利用水平与东部和西部、东北地区比较呈现两极变化趋势。

Application of Global Principal Components to Land Intensive Utilization: Case Study on China's Central Area

Based on the establishment of evaluation index system,this paper applies global principal components analysis of three-dimensional data table indexed by time sequence to China's eastern,central,western and northeastern areas from 1997 to 2005,and concludes the changing rule of the land intensive utilization in China's central area by comparison and analysis.The results show that: the method of global principal components analysis is extensively applicable;the level of land intensive utilization in China's central area has been improving for nine years;the level of land intensive utilization in China's central area has a two-polar trend compared to eastern,western and northeastern areas.