In an earlier study, the Atmospheric Models Intercomparison Program (AMIP) simulations of African climate using the nine-layer gridpoint atmospheric general circulation model were found to be closely related to the ob...In an earlier study, the Atmospheric Models Intercomparison Program (AMIP) simulations of African climate using the nine-layer gridpoint atmospheric general circulation model were found to be closely related to the observed European Centre for Medium Range Weather Forecast (ECMWF) temperature data at 500 and 850 hPa. This paper presents the analysis of the simulation of African climate using the Global Ocean-Atmosphere-Land System Model (IAP/LASG GOALS) and the nine-layer spectral general circulation model rhomboidally truncated at zonal wave number 15 (L9R15) developed at the Institute of Atmospheric Physics (IAP), Chinese Academy of Sciences, Beijing. Both model simulations were not significantly different from the National Center for Environmental Prediction (NCEP) Reanalysis monthly mean data for 1980-1995 in the case of surface air temperature, sea level pressure and precipitation, with the GOALS reproducing the seasonal mean climate over Africa better. The implications of the encouraging results in developing a local area model for Nigeria have been discussed. The great role of topography in the developing of general circulation models for numerical modelling of weather and climate has been stressed.展开更多
软件定义网络(Software Defined Netrork,SDN)技术在医院网络中的应用已经取得了显著进展,为医疗信息化和服务提供了强大的支持。讨论了传统医院网络架构所面临的多项挑战,包括内外网边界隔离、网络安全问题、业务复杂场景等,并探讨了SD...软件定义网络(Software Defined Netrork,SDN)技术在医院网络中的应用已经取得了显著进展,为医疗信息化和服务提供了强大的支持。讨论了传统医院网络架构所面临的多项挑战,包括内外网边界隔离、网络安全问题、业务复杂场景等,并探讨了SDN如何应对这些挑战以及如何改善医院网络的性能和安全性。具体而言,SDN技术通过多网融合,使用虚拟扩展局域网(Virtual Extensible Local Area Network,VXLAN)实现逻辑隔离,简化了网络配置和管理,同时确保了网络的安全性。除此以外,SDN引入了虚拟安全资源池和网络功能虚拟化(Network Functions Virtualization,NFV)技术,实现了跨网流量的安全访问和高效管理。SDN的网络智能和运维简化使医院能够更好地适应不同业务场景,提高了网络的灵活性和可管理性。总之,SDN技术在医院网络中的应用为医院信息化带来了新的可能性,同时提出了未来进一步改进和发展的方向。展开更多
文摘In an earlier study, the Atmospheric Models Intercomparison Program (AMIP) simulations of African climate using the nine-layer gridpoint atmospheric general circulation model were found to be closely related to the observed European Centre for Medium Range Weather Forecast (ECMWF) temperature data at 500 and 850 hPa. This paper presents the analysis of the simulation of African climate using the Global Ocean-Atmosphere-Land System Model (IAP/LASG GOALS) and the nine-layer spectral general circulation model rhomboidally truncated at zonal wave number 15 (L9R15) developed at the Institute of Atmospheric Physics (IAP), Chinese Academy of Sciences, Beijing. Both model simulations were not significantly different from the National Center for Environmental Prediction (NCEP) Reanalysis monthly mean data for 1980-1995 in the case of surface air temperature, sea level pressure and precipitation, with the GOALS reproducing the seasonal mean climate over Africa better. The implications of the encouraging results in developing a local area model for Nigeria have been discussed. The great role of topography in the developing of general circulation models for numerical modelling of weather and climate has been stressed.
文摘软件定义网络(Software Defined Netrork,SDN)技术在医院网络中的应用已经取得了显著进展,为医疗信息化和服务提供了强大的支持。讨论了传统医院网络架构所面临的多项挑战,包括内外网边界隔离、网络安全问题、业务复杂场景等,并探讨了SDN如何应对这些挑战以及如何改善医院网络的性能和安全性。具体而言,SDN技术通过多网融合,使用虚拟扩展局域网(Virtual Extensible Local Area Network,VXLAN)实现逻辑隔离,简化了网络配置和管理,同时确保了网络的安全性。除此以外,SDN引入了虚拟安全资源池和网络功能虚拟化(Network Functions Virtualization,NFV)技术,实现了跨网流量的安全访问和高效管理。SDN的网络智能和运维简化使医院能够更好地适应不同业务场景,提高了网络的灵活性和可管理性。总之,SDN技术在医院网络中的应用为医院信息化带来了新的可能性,同时提出了未来进一步改进和发展的方向。