Studying the change in population distribution and density can provide important basis for regional development and planning. The spatial patterns and driving factors of the change in population density in China were ...Studying the change in population distribution and density can provide important basis for regional development and planning. The spatial patterns and driving factors of the change in population density in China were not clear yet. Therefore, using the population census data in 2000 and 2010, this study firstly analyzed the change of population density in China and divided the change in all 2353 counties into 4 types, consisting of rapid increase, slow increase, slow decrease and rapid decrease. Subsequently, based on the partial least square （PLS） regression method, we recognized the significant factors （among 11 natural and social-economic factors） impacting population density change for the whole country and counties with different types of population change. The results showed that： （1） compared to the population density in 2000, in 2010, the population density in most of the counties （over 60%） increased by 21 persons per km2 on average, while the population density in other counties decreased by 13 persons per km2. Of all the 2353 counties, 860 and 589 counties respectively showed rapid and slow increase in population density, while 458 and 446 coun- ties showed slow and rapid decrease in population density, respectively. （2） Among the 11 factors, social-economic factors impacted population density change more significantly than natural factors. The higher economic development level, better medical condition and stronger communication capability were the main pull factors of population increase. The dense population density was the main push factor of population decrease. These conclusions clarified the spatial pattern of population change and its influencing factors in China over the past 10 years and could provide helpful reference for the future population planning.展开更多
中国电力市场化改革实施以来效果如何,是公众广为关注的问题。本文依据路径-目标理论,构建了电力企业对电力体制改革适应性的管理结构模型,通过问卷调查分析,运用PLS(Partial Least Squares)方法,从电力企业管理的微观角度,审视电力体...中国电力市场化改革实施以来效果如何,是公众广为关注的问题。本文依据路径-目标理论,构建了电力企业对电力体制改革适应性的管理结构模型,通过问卷调查分析,运用PLS(Partial Least Squares)方法,从电力企业管理的微观角度,审视电力体制改革对发电、电网两种类型企业的影响以及电力体制改革中存在的问题。模型可靠性和有效性良好。结果表明,市场化改革的思路可以有效引导企业积极变革,企业管理总体上是健康的;电力体制改革应该增强系统性,增加透明度,稳定企业对改革的预期;发电企业和电网企业需要进一步适应市场化环境,提高发展战略等薄弱环节的管理水平。展开更多
基金Key Project of National Natural Science Foundation of China, No.41430861 Foundation of Bureau of Floating Population, National Health and Family Planning Commission of China, No.201011
文摘Studying the change in population distribution and density can provide important basis for regional development and planning. The spatial patterns and driving factors of the change in population density in China were not clear yet. Therefore, using the population census data in 2000 and 2010, this study firstly analyzed the change of population density in China and divided the change in all 2353 counties into 4 types, consisting of rapid increase, slow increase, slow decrease and rapid decrease. Subsequently, based on the partial least square （PLS） regression method, we recognized the significant factors （among 11 natural and social-economic factors） impacting population density change for the whole country and counties with different types of population change. The results showed that： （1） compared to the population density in 2000, in 2010, the population density in most of the counties （over 60%） increased by 21 persons per km2 on average, while the population density in other counties decreased by 13 persons per km2. Of all the 2353 counties, 860 and 589 counties respectively showed rapid and slow increase in population density, while 458 and 446 coun- ties showed slow and rapid decrease in population density, respectively. （2） Among the 11 factors, social-economic factors impacted population density change more significantly than natural factors. The higher economic development level, better medical condition and stronger communication capability were the main pull factors of population increase. The dense population density was the main push factor of population decrease. These conclusions clarified the spatial pattern of population change and its influencing factors in China over the past 10 years and could provide helpful reference for the future population planning.
文摘中国电力市场化改革实施以来效果如何,是公众广为关注的问题。本文依据路径-目标理论,构建了电力企业对电力体制改革适应性的管理结构模型,通过问卷调查分析,运用PLS(Partial Least Squares)方法,从电力企业管理的微观角度,审视电力体制改革对发电、电网两种类型企业的影响以及电力体制改革中存在的问题。模型可靠性和有效性良好。结果表明,市场化改革的思路可以有效引导企业积极变革,企业管理总体上是健康的;电力体制改革应该增强系统性,增加透明度,稳定企业对改革的预期;发电企业和电网企业需要进一步适应市场化环境,提高发展战略等薄弱环节的管理水平。
