水资源绿色效率研究对于践行绿色发展观、实现水资源高效利用具有重要意义.利用SBM(slack based measure)模型测算了2003~2018年黑龙江省水资源绿色效率并进行时空演变分析,同时利用空间自相关法进行水资源绿色效率的空间聚集性研究,最...水资源绿色效率研究对于践行绿色发展观、实现水资源高效利用具有重要意义.利用SBM(slack based measure)模型测算了2003~2018年黑龙江省水资源绿色效率并进行时空演变分析,同时利用空间自相关法进行水资源绿色效率的空间聚集性研究,最后进行投入和产出变量调整情景模拟和水资源绿色效率的影响因素分析.研究发现:黑龙江省平均水资源绿色效率处于较低水平,但总体呈波动上升的趋势;黑龙江省南部水资源绿色效率上升幅度较大,北部地区效率也有所提升,东部和西部地区效率相对较低且变化不大;黑龙江省水资源绿色效率具有空间聚集性特征,高高聚集和低低聚集分别位于南部和西部地区,低高聚集分布在东部地区;用水量、劳动力、固定资产投资和灰水足迹对水资源绿色效率为负向影响,GDP和社会综合指数则对水资源绿色效率提升具有积极作用,不同地区的主要影响因素也存在差异.通过研究水资源绿色效率对社会环境和相关政策变化的动态响应及其影响因素,有利于加强区域水资源管理和优化水资源利用方式,进一步推动黑龙江省可持续发展.展开更多
Accessibility is an important tool</span></span><span><span><span style="font-family:""> </span></span></span><span style="font-family:Verdana;&qu...Accessibility is an important tool</span></span><span><span><span style="font-family:""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">to evaluate the maturity of a regional traffic network structure</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> which </span></span></span><span><span><span style="font-family:""><span style="font-family:Verdana;">describes the traffic convenience in the traffic</span><span style="font-family:Verdana;"> network. </span><span style="font-family:Verdana;">The paper defines a new accessibility index by using the resident pop</span><span style="font-family:Verdana;">ulation weighted average value of the sum of inverse of the traveling time </span><span style="font-family:Verdana;">distance and time threshold coming from ordinary traffic network, and then uses this accessibility index to analyze the spatial-temporal characteristics of Henan highway network, as well as its evolution patterns from 2005 to 2020. The results show that with the expansion and improvement of Henan highway network, city accessibility level has been significantly improved, spatial convergence is obvious, the cities in the north central are always High-High aggregation area, the cities in the south are always Low-Low aggregation area, gradually forming the characteristics of Northwest high and Southeast low, relative balance between East and West. There is some non-conforming phenomenon in highway mileage growth and improvement of the city accessibility levels, but this situation is being weakened, the highway network layout is gradually rationalized, the spatial distribution of city accessibility and that of population are beginning to converge.展开更多
文摘水资源绿色效率研究对于践行绿色发展观、实现水资源高效利用具有重要意义.利用SBM(slack based measure)模型测算了2003~2018年黑龙江省水资源绿色效率并进行时空演变分析,同时利用空间自相关法进行水资源绿色效率的空间聚集性研究,最后进行投入和产出变量调整情景模拟和水资源绿色效率的影响因素分析.研究发现:黑龙江省平均水资源绿色效率处于较低水平,但总体呈波动上升的趋势;黑龙江省南部水资源绿色效率上升幅度较大,北部地区效率也有所提升,东部和西部地区效率相对较低且变化不大;黑龙江省水资源绿色效率具有空间聚集性特征,高高聚集和低低聚集分别位于南部和西部地区,低高聚集分布在东部地区;用水量、劳动力、固定资产投资和灰水足迹对水资源绿色效率为负向影响,GDP和社会综合指数则对水资源绿色效率提升具有积极作用,不同地区的主要影响因素也存在差异.通过研究水资源绿色效率对社会环境和相关政策变化的动态响应及其影响因素,有利于加强区域水资源管理和优化水资源利用方式,进一步推动黑龙江省可持续发展.
文摘Accessibility is an important tool</span></span><span><span><span style="font-family:""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">to evaluate the maturity of a regional traffic network structure</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> which </span></span></span><span><span><span style="font-family:""><span style="font-family:Verdana;">describes the traffic convenience in the traffic</span><span style="font-family:Verdana;"> network. </span><span style="font-family:Verdana;">The paper defines a new accessibility index by using the resident pop</span><span style="font-family:Verdana;">ulation weighted average value of the sum of inverse of the traveling time </span><span style="font-family:Verdana;">distance and time threshold coming from ordinary traffic network, and then uses this accessibility index to analyze the spatial-temporal characteristics of Henan highway network, as well as its evolution patterns from 2005 to 2020. The results show that with the expansion and improvement of Henan highway network, city accessibility level has been significantly improved, spatial convergence is obvious, the cities in the north central are always High-High aggregation area, the cities in the south are always Low-Low aggregation area, gradually forming the characteristics of Northwest high and Southeast low, relative balance between East and West. There is some non-conforming phenomenon in highway mileage growth and improvement of the city accessibility levels, but this situation is being weakened, the highway network layout is gradually rationalized, the spatial distribution of city accessibility and that of population are beginning to converge.
