In China,the economic systems of many small-scale resource-based regions are confronted with realizing sustainable development through economic transformation. This paper,taking 37 coal-resource-based counties in Chin...In China,the economic systems of many small-scale resource-based regions are confronted with realizing sustainable development through economic transformation. This paper,taking 37 coal-resource-based counties in China as objects,evaluates the economic transformation capacities of the counties by principal component analysis (PCA). Based on the comprehensive principal component values of >1,0–1 and <0,the economic transformation capacities of the counties are classified into strong,common and weak grades. Then,the paper proposes the developmental countermeasures according to different transformation capacities. For the counties with strong transformation capacities,it is crucial to make scientific positioning and rationally exploite resources in view of the developing characteristics and modes of those counties; as for the counties with common transformation capacities,the preparation and perfection of basic transformation conditions are still important aspects; as for the counties with weak transformation capacities,shifting from ″passive transfromation″ to ″active transformation″ in light of resources conditions is necessary.展开更多
With the deployment of small cells and device to device communications in future heterogeneous networks,in many situations we would encounter mobile radio channels with partly blocked line of sight component,which are...With the deployment of small cells and device to device communications in future heterogeneous networks,in many situations we would encounter mobile radio channels with partly blocked line of sight component,which are well modeled by the Rician shadowed(RS) fading channel.In this paper,by the usage of Kummer transformation,a simplified representation of the RS fading channel with integral fading parameter is given.It is a finite series representation involving only exponential function and low order polynomials.This allows engineers not only the closed-form expressions for exact performance analysis over RS fading channel,but also the insights on the system design tactics.展开更多
This study investigates the effects of tourism development perception,adaptive capacity,and transformation capacity on the residents’livelihood resilience in a national park.Using the Yellow River Source Park in Sanj...This study investigates the effects of tourism development perception,adaptive capacity,and transformation capacity on the residents’livelihood resilience in a national park.Using the Yellow River Source Park in Sanjiangyuan National Park,China as a case study,this study simultaneously used the partial least squares structural equation model(PLS-SEM)and fuzzy-set qualitative comparative analysis(fs/QCA)to explore the linear and nonlinear dynamic impacts among the variables.PLS-SEM analysis revealed that adaptive capacity and transformation capacity positively affect livelihood resilience;tourism development perception negatively affects livelihood resilience but positively affects adaptive capacity and transformation capacity.Tourism development perception and adaptive capacity can positively influence livelihood resilience through transformation capacity.The fs/QCA revealed that simple antecedent variables do not constitute a necessary condition for promoting residents'high livelihood resilience,which depends on the conditions combined with another element.The analysis identified two combination paths of high livelihood resilience and three combination paths of low livelihood resilience,where adaptive and transformation capacity are essential for triggering high livelihood resilience,and tourism development perception is a significant driver of low livelihood resilience.展开更多
基金Under the auspices of Key Program of National Natural Science Foundation of China (No. 40635030)
文摘In China,the economic systems of many small-scale resource-based regions are confronted with realizing sustainable development through economic transformation. This paper,taking 37 coal-resource-based counties in China as objects,evaluates the economic transformation capacities of the counties by principal component analysis (PCA). Based on the comprehensive principal component values of >1,0–1 and <0,the economic transformation capacities of the counties are classified into strong,common and weak grades. Then,the paper proposes the developmental countermeasures according to different transformation capacities. For the counties with strong transformation capacities,it is crucial to make scientific positioning and rationally exploite resources in view of the developing characteristics and modes of those counties; as for the counties with common transformation capacities,the preparation and perfection of basic transformation conditions are still important aspects; as for the counties with weak transformation capacities,shifting from ″passive transfromation″ to ″active transformation″ in light of resources conditions is necessary.
基金sponsored by the National Natural Science Foundation of China under grant No.61171089the Training Program of the Major Research Plan of the National Natural Science Foundation of China under grant No.91438104
文摘With the deployment of small cells and device to device communications in future heterogeneous networks,in many situations we would encounter mobile radio channels with partly blocked line of sight component,which are well modeled by the Rician shadowed(RS) fading channel.In this paper,by the usage of Kummer transformation,a simplified representation of the RS fading channel with integral fading parameter is given.It is a finite series representation involving only exponential function and low order polynomials.This allows engineers not only the closed-form expressions for exact performance analysis over RS fading channel,but also the insights on the system design tactics.
基金The National Natural Science Foundation of China(42171239)。
文摘This study investigates the effects of tourism development perception,adaptive capacity,and transformation capacity on the residents’livelihood resilience in a national park.Using the Yellow River Source Park in Sanjiangyuan National Park,China as a case study,this study simultaneously used the partial least squares structural equation model(PLS-SEM)and fuzzy-set qualitative comparative analysis(fs/QCA)to explore the linear and nonlinear dynamic impacts among the variables.PLS-SEM analysis revealed that adaptive capacity and transformation capacity positively affect livelihood resilience;tourism development perception negatively affects livelihood resilience but positively affects adaptive capacity and transformation capacity.Tourism development perception and adaptive capacity can positively influence livelihood resilience through transformation capacity.The fs/QCA revealed that simple antecedent variables do not constitute a necessary condition for promoting residents'high livelihood resilience,which depends on the conditions combined with another element.The analysis identified two combination paths of high livelihood resilience and three combination paths of low livelihood resilience,where adaptive and transformation capacity are essential for triggering high livelihood resilience,and tourism development perception is a significant driver of low livelihood resilience.
