A longstanding discrepancy between theoretical predictions and experimental observations on the highpressurestructural transformations of lanthanum mononitride(LaN)has posed challenges for understandingthe behavior of...A longstanding discrepancy between theoretical predictions and experimental observations on the highpressurestructural transformations of lanthanum mononitride(LaN)has posed challenges for understandingthe behavior of heavy transition metal mononitrides.Here,we systematically investigate the structural evolutionof LaN under high pressure using first-principles calculations combined with angle-dispersive synchrotron X-raydiffraction,identifying the phase transition sequence and corresponding phase boundaries.Analyses of energetics,kinetic barriers,and lattice dynamics reveal distinct mechanisms driving these transitions.These results clarifythe structural stability of LaN and offer guidance for studying other heavy transition metal mononitrides withcomplex electronic behavior under extreme conditions.展开更多
随着我国医疗事业的高质量发展,大型医院多位于城市中心区,老旧小区多,扩建难度大。因此,分区建院成为必然趋势。为确保多院区信息系统的可用性和一致性,各院区的网络结构设计,不仅要保障院内网连通,还需在数据层实现网络连通,以提供连...随着我国医疗事业的高质量发展,大型医院多位于城市中心区,老旧小区多,扩建难度大。因此,分区建院成为必然趋势。为确保多院区信息系统的可用性和一致性,各院区的网络结构设计,不仅要保障院内网连通,还需在数据层实现网络连通,以提供连续、不中断的对外服务,同时为IPv6的扩展和升级奠定基础。因此,构建医院多院区网络十分有必要。文章以浙江大学医学院附属口腔医院为例,基于软件定义网络(Software Defined Network,SDN)与虚拟可扩展局域网(Virtual Extensible Local Area Network,Vx LAN)技术,通过双层网络连接院间数据中心,将两台服务器置于一个双层网络,确保在虚拟或超级融合环境下能顺利迁移。研究支持应用层双活化和资源统一调度,构建了更高可用、更广接入和更智能的网络体系结构。展开更多
Based on the household survey of nine villages in Guangdong Province and Hunan Province,we research the relationship between landless farmers and land adjustment,land transfer in the context of rural land contract rig...Based on the household survey of nine villages in Guangdong Province and Hunan Province,we research the relationship between landless farmers and land adjustment,land transfer in the context of rural land contract rights on a long term basis.We demonstrate that the existence of landless farmers does not pose a serious problem for the current rural community.We also explain the reason why the land is no longer readjusted:the expected return of land adjustment is low and the organizational costs are high.展开更多
基金supported by the Natural Science Foundation of China(Grant Nos.T2325013,12474004,and 52288102)the National Key Research and Development Program of China(Grant No.2021YFA1400503)the Program for Jilin University Science and Technology Innovative Research Team。
文摘A longstanding discrepancy between theoretical predictions and experimental observations on the highpressurestructural transformations of lanthanum mononitride(LaN)has posed challenges for understandingthe behavior of heavy transition metal mononitrides.Here,we systematically investigate the structural evolutionof LaN under high pressure using first-principles calculations combined with angle-dispersive synchrotron X-raydiffraction,identifying the phase transition sequence and corresponding phase boundaries.Analyses of energetics,kinetic barriers,and lattice dynamics reveal distinct mechanisms driving these transitions.These results clarifythe structural stability of LaN and offer guidance for studying other heavy transition metal mononitrides withcomplex electronic behavior under extreme conditions.
文摘随着我国医疗事业的高质量发展,大型医院多位于城市中心区,老旧小区多,扩建难度大。因此,分区建院成为必然趋势。为确保多院区信息系统的可用性和一致性,各院区的网络结构设计,不仅要保障院内网连通,还需在数据层实现网络连通,以提供连续、不中断的对外服务,同时为IPv6的扩展和升级奠定基础。因此,构建医院多院区网络十分有必要。文章以浙江大学医学院附属口腔医院为例,基于软件定义网络(Software Defined Network,SDN)与虚拟可扩展局域网(Virtual Extensible Local Area Network,Vx LAN)技术,通过双层网络连接院间数据中心,将两台服务器置于一个双层网络,确保在虚拟或超级融合环境下能顺利迁移。研究支持应用层双活化和资源统一调度,构建了更高可用、更广接入和更智能的网络体系结构。
基金Supported by National Social Science Fund Project(11BJY094)211 Project of College of Economics and Management,South China Agricultural University(2011211TD02)
文摘Based on the household survey of nine villages in Guangdong Province and Hunan Province,we research the relationship between landless farmers and land adjustment,land transfer in the context of rural land contract rights on a long term basis.We demonstrate that the existence of landless farmers does not pose a serious problem for the current rural community.We also explain the reason why the land is no longer readjusted:the expected return of land adjustment is low and the organizational costs are high.
