等级保护2.0(以下简称“等保2.0”)对数据中心信息安全架构提出了合规与技术要求。文章构建四层联动架构模型,涵盖网络安全、计算环境、应用数据与安全运营4个层面,通过引入零信任访问控制、虚拟化隔离机制、数据全生命周期防护及安全...等级保护2.0(以下简称“等保2.0”)对数据中心信息安全架构提出了合规与技术要求。文章构建四层联动架构模型,涵盖网络安全、计算环境、应用数据与安全运营4个层面,通过引入零信任访问控制、虚拟化隔离机制、数据全生命周期防护及安全编排自动化响应(Security Orchestration Automation and Response,SOAR)机制,提出了一套面向等保2.0的优化实施方案。实验结果表明,优化架构在检测率、响应效率、资源占用等关键指标上相较传统架构均有显著提升。因此,优化架构具备良好的工程适配性与合规落地能力。展开更多
The implementation of multifunctional application scenarios for mobile terminal devices has increased the energy density requirements of batteries.Increasing the charging voltage can rapidly increase the specific capa...The implementation of multifunctional application scenarios for mobile terminal devices has increased the energy density requirements of batteries.Increasing the charging voltage can rapidly increase the specific capacity of layered transition metal oxides;however,it also exacerbates the release of lattice oxygen and the contraction of the unit cell.Ternary materials are designed in a secondary particle state to meet the requirements of power battery applications.Therefore,to create ternary materials that can operate under ultrahigh voltages,attention should be given to both surface modification and particle integrity maintenance.By utilizing elemental selenium(Se)with a low melting point,easy sublimation,and multiple variable valence states,deep grain boundary modification was implemented inside the particles.The performance of the cathode material was evaluated through pouch cells,and the improvement mechanism was explored through molecular dynamics simulation calculations.Under the protection of a three-dimensional Se-rich modified layer,LiNi_(1/3)Co_(1/3)Mn_(1/3)O_(2)achieved stable operation at ultrahigh voltages(4.6 V vs.Li/Li^(+));a sacrificial protection mechanism based on the chronic decomposition of the Se-rich layer was proposed to explain the efficacy of Se modification in stabilizing ternary materials.This deep grain boundary modification based on elemental Se provides a new solution for the ultrahigh-voltage operation of transition metal oxides and provides a scientific basis and technical support for solving the interface contact problem of all-solid-state batteries.展开更多
文摘等级保护2.0(以下简称“等保2.0”)对数据中心信息安全架构提出了合规与技术要求。文章构建四层联动架构模型,涵盖网络安全、计算环境、应用数据与安全运营4个层面,通过引入零信任访问控制、虚拟化隔离机制、数据全生命周期防护及安全编排自动化响应(Security Orchestration Automation and Response,SOAR)机制,提出了一套面向等保2.0的优化实施方案。实验结果表明,优化架构在检测率、响应效率、资源占用等关键指标上相较传统架构均有显著提升。因此,优化架构具备良好的工程适配性与合规落地能力。
基金supported by the National Natural Science Foundation of China (52302259)the China Postdoctoral Science Foundation (CPSF) under Grant Number 2023M741479+4 种基金the Postdoctoral Fellowship Program of CPSF under Grant Number GZB20240280the Jiangxi Provincial Natural Science Foundation (20224ACB218006)the financial support from High-level Talent Research Special Funds of Jiangxi University of Science and Technology (Grant No. 205200100670)the Jiangxi Provincial Key Laboratory of Power Energy Storage Batteries and Materials (2024SSY10011)the Major Scientific and Technological Research R&D Special Project of Jiangxi Province(20244AFI92002)
文摘The implementation of multifunctional application scenarios for mobile terminal devices has increased the energy density requirements of batteries.Increasing the charging voltage can rapidly increase the specific capacity of layered transition metal oxides;however,it also exacerbates the release of lattice oxygen and the contraction of the unit cell.Ternary materials are designed in a secondary particle state to meet the requirements of power battery applications.Therefore,to create ternary materials that can operate under ultrahigh voltages,attention should be given to both surface modification and particle integrity maintenance.By utilizing elemental selenium(Se)with a low melting point,easy sublimation,and multiple variable valence states,deep grain boundary modification was implemented inside the particles.The performance of the cathode material was evaluated through pouch cells,and the improvement mechanism was explored through molecular dynamics simulation calculations.Under the protection of a three-dimensional Se-rich modified layer,LiNi_(1/3)Co_(1/3)Mn_(1/3)O_(2)achieved stable operation at ultrahigh voltages(4.6 V vs.Li/Li^(+));a sacrificial protection mechanism based on the chronic decomposition of the Se-rich layer was proposed to explain the efficacy of Se modification in stabilizing ternary materials.This deep grain boundary modification based on elemental Se provides a new solution for the ultrahigh-voltage operation of transition metal oxides and provides a scientific basis and technical support for solving the interface contact problem of all-solid-state batteries.
