For mankind’s survival and development,water,energy,and food(WEF)are essential material guarantees.In China,however,the spatial distribution of WEF is seriously unbalanced and mismatched.Here,a collaborative governan...For mankind’s survival and development,water,energy,and food(WEF)are essential material guarantees.In China,however,the spatial distribution of WEF is seriously unbalanced and mismatched.Here,a collaborative governance mechanism that aims at nexus security needs to be urgently established.In this paper,the Yellow River Basin in China with a representative WEF system,was selected as a case.Firstly,a comprehensive framework for WEF coupling coordination was constructed,and the relationship and mechanism between them were analyzed theoretically.Then,we investigated the spatiotemporal characteristics and driving mechanisms of the coupling coordination degree(CCD)with a composite evaluation method,coupling coordination degree model,spatial statistical analysis,and multiscale geographic weighted regression.Finally,policy implications were discussed to promote the coordinated development of the WEF system.The results showed that:1)WEF subsystems showed a significant imbalance of spatial pattern and diversity in temporal changes;2)the CCD for the WEF system varied little and remained at moderate coordination.Areas with moderate coordination have increased,while areas with superior coordination and mild disorder have decreased.In addition,the spatial clustering phenomenon of the CCD was significant and showed obvious characteristics of polarization;and 3)the action of each factor is self-differentiated and regionally variable.For different factors,GDP per capita was of particular importance,which contributed most to the regional development’s coupling coordination.For different regions,GDP per capita,average yearly precipitation,population density,and urbanization rate exhibited differences in geographical gradients in an east-west direction.The conclusion can provide references for regional resource allocation and sustainable development by enhancing WEF system utilization efficiency.展开更多
将Web技术与Matlab相结合,在分析了Matlab Web Server的工作原理的基础上,实现了基于Web的控制系统仿真平台的开发.文中给出了Matlab Web程序处理的一般流程和相关文件的详细配置过程,并就Matlab程序如何通过HTML页面获取参数、如何建立...将Web技术与Matlab相结合,在分析了Matlab Web Server的工作原理的基础上,实现了基于Web的控制系统仿真平台的开发.文中给出了Matlab Web程序处理的一般流程和相关文件的详细配置过程,并就Matlab程序如何通过HTML页面获取参数、如何建立M文件和如何生成包含数据和图片的HTML文件等关键问题作了重点阐述,并以水槽液位PID控制仿真为例,对其实现的过程进行了说明.展开更多
The 2019 World Economic Forum (WEF)Annual Meeting,'convened in Davos,Switzerland,on January 22-25 under the theme of Globali zation 4.0:Shaping a New Architecture in the Age of the Fourth Industrial Revolution, br...The 2019 World Economic Forum (WEF)Annual Meeting,'convened in Davos,Switzerland,on January 22-25 under the theme of Globali zation 4.0:Shaping a New Architecture in the Age of the Fourth Industrial Revolution, brdught together senior government officials,executives from major global com- panies,leaders of international organizations and non-governmental organizations, and other prominent figures for intensive deliberations.展开更多
基金Under the auspices of Graduate Innovation Program of China University of Mining and Technology (No.2022WLKXJ095)National Natural Science Foundation of China (No.71874192)Youth Project of Fundamental Research Funds for the Central Universities (No.2021QN1076)。
文摘For mankind’s survival and development,water,energy,and food(WEF)are essential material guarantees.In China,however,the spatial distribution of WEF is seriously unbalanced and mismatched.Here,a collaborative governance mechanism that aims at nexus security needs to be urgently established.In this paper,the Yellow River Basin in China with a representative WEF system,was selected as a case.Firstly,a comprehensive framework for WEF coupling coordination was constructed,and the relationship and mechanism between them were analyzed theoretically.Then,we investigated the spatiotemporal characteristics and driving mechanisms of the coupling coordination degree(CCD)with a composite evaluation method,coupling coordination degree model,spatial statistical analysis,and multiscale geographic weighted regression.Finally,policy implications were discussed to promote the coordinated development of the WEF system.The results showed that:1)WEF subsystems showed a significant imbalance of spatial pattern and diversity in temporal changes;2)the CCD for the WEF system varied little and remained at moderate coordination.Areas with moderate coordination have increased,while areas with superior coordination and mild disorder have decreased.In addition,the spatial clustering phenomenon of the CCD was significant and showed obvious characteristics of polarization;and 3)the action of each factor is self-differentiated and regionally variable.For different factors,GDP per capita was of particular importance,which contributed most to the regional development’s coupling coordination.For different regions,GDP per capita,average yearly precipitation,population density,and urbanization rate exhibited differences in geographical gradients in an east-west direction.The conclusion can provide references for regional resource allocation and sustainable development by enhancing WEF system utilization efficiency.
文摘将Web技术与Matlab相结合,在分析了Matlab Web Server的工作原理的基础上,实现了基于Web的控制系统仿真平台的开发.文中给出了Matlab Web程序处理的一般流程和相关文件的详细配置过程,并就Matlab程序如何通过HTML页面获取参数、如何建立M文件和如何生成包含数据和图片的HTML文件等关键问题作了重点阐述,并以水槽液位PID控制仿真为例,对其实现的过程进行了说明.
文摘The 2019 World Economic Forum (WEF)Annual Meeting,'convened in Davos,Switzerland,on January 22-25 under the theme of Globali zation 4.0:Shaping a New Architecture in the Age of the Fourth Industrial Revolution, brdught together senior government officials,executives from major global com- panies,leaders of international organizations and non-governmental organizations, and other prominent figures for intensive deliberations.
