提出一种基于MILS(Multiple Independent Levels of Security,多级独立安全)高可靠架构的多级安全文件系统架构。文件系统应用分区与其他分区间的通信采用严格的两级消息处理机制,MMR组件进行消息路由,Guard组件执行安全策略检查。并提...提出一种基于MILS(Multiple Independent Levels of Security,多级独立安全)高可靠架构的多级安全文件系统架构。文件系统应用分区与其他分区间的通信采用严格的两级消息处理机制,MMR组件进行消息路由,Guard组件执行安全策略检查。并提出目录视图的概念确保文件对不同等级用户的透明性。展开更多
Let (xn,(?)n) be a uniform amart. If sap E||xn||=∞, then there exists a stopping time τsuch that E||xτ||I(τ<∞)=∞. Moreover, if E has RNP, then every vector-valued mil (GFT) of class (C) converges a. s. (in pr...Let (xn,(?)n) be a uniform amart. If sap E||xn||=∞, then there exists a stopping time τsuch that E||xτ||I(τ<∞)=∞. Moreover, if E has RNP, then every vector-valued mil (GFT) of class (C) converges a. s. (in probability) strongly.展开更多
多新息最小二乘法(Multi-innovation Least Square Algorithm,MILS)是一种重要的参数辨识方法,水下机器人的航行数据往往存在复杂噪声的干扰,MILS算法在应对复杂噪声数据的参数辨识中存在明显不足。针对MILS存在的不足,提出了一种基于...多新息最小二乘法(Multi-innovation Least Square Algorithm,MILS)是一种重要的参数辨识方法,水下机器人的航行数据往往存在复杂噪声的干扰,MILS算法在应对复杂噪声数据的参数辨识中存在明显不足。针对MILS存在的不足,提出了一种基于多新息广义扩展最小二乘算法(Multi-innovation Generalized Extended Least Square Algorithm,MIGELS)的水下机器人参数辨识方法。开展水下机器人运动学和动力学分析,建立水下机器人的运动方程。介绍MILS算法,在MILS算法基础上开展详细的MIGELS算法的数学推导过程,并给出完整的MIGELS算法的描述公式。搭建水下机器人在线参数辨识仿真平台,在线采集具有复杂噪声的观测数据,分别基于MILS算法和MIGELS算法开展参数辨识仿真实验。仿真结果表明,基于MIGELS算法的参数辨识方法能够有效地在线辨识出水下机器人的水动力系数,相较于MILS算法,MIGELS算法明显具有更好的辨识精度和收敛速度,表明在应对复杂噪声的参数辨识问题时MIGELS算法更具优势,这对于促进水下机器人的参数辨识研究具有重要的意义。展开更多
Silicon-air(Si-air)batteries have received significant attention owing to their high theoretical energy density and safety profile.However,the actual energy density of the Si-air battery remains significantly lower th...Silicon-air(Si-air)batteries have received significant attention owing to their high theoretical energy density and safety profile.However,the actual energy density of the Si-air battery remains significantly lower than the theoretical value,primarily due to corrosion issues and passivation.This study used various metal-organic framework(MOF)materials,such as MIL-53(Al),MIL-88(Fe),and MIL-101(Cr),to modify Si anodes.The MOFs were fabricated to have different morphologies,particle sizes,and pore sizes by altering their central metal nodes and ligands.This approach aimed to modulate the adsorption behavior of H_(2)O,SiO_(2),and OH^(−),thereby mitigating corrosion and passivation reactions.Under a constant current of 150μA,Si-air batteries with MIL-53(Al)@Si,MIL-88(Fe)@Si,and MIL-101(Cr)@Si as anodes demonstrated lifetimes of 293,412,and 336 h,respectively,surpassing the 276 h observed with pristine silicon anodes.Among these composite anodes,MIL-88(Fe)@Si displayed the best performance due to its superior hydrophobicity and optimal pore size,which enhance OH^(−)migration.This study offers a promising strategy for enhancing Si-air battery performance by developing an anodic protective layer with selective screening properties.展开更多
The authors regret<During the submission process,Hongxiang Zhang and Honggen Peng served as the first and the second corresponding author,respectively.The original manuscript submitted for this paper also listed tw...The authors regret<During the submission process,Hongxiang Zhang and Honggen Peng served as the first and the second corresponding author,respectively.The original manuscript submitted for this paper also listed two co-corresponding authors(Hongxiang Zhang and Honggen Peng).But the corresponding author of Honggen Peng was omitted in the final published manuscript.So,we apply to designate Honggen Peng(penghonggen@ncu.edu.cn)as the second co-corresponding author and the corresponding unit is“a,b">.展开更多
文摘提出一种基于MILS(Multiple Independent Levels of Security,多级独立安全)高可靠架构的多级安全文件系统架构。文件系统应用分区与其他分区间的通信采用严格的两级消息处理机制,MMR组件进行消息路由,Guard组件执行安全策略检查。并提出目录视图的概念确保文件对不同等级用户的透明性。
基金Project supported by the National Natural Science Foundation of China
文摘Let (xn,(?)n) be a uniform amart. If sap E||xn||=∞, then there exists a stopping time τsuch that E||xτ||I(τ<∞)=∞. Moreover, if E has RNP, then every vector-valued mil (GFT) of class (C) converges a. s. (in probability) strongly.
文摘多新息最小二乘法(Multi-innovation Least Square Algorithm,MILS)是一种重要的参数辨识方法,水下机器人的航行数据往往存在复杂噪声的干扰,MILS算法在应对复杂噪声数据的参数辨识中存在明显不足。针对MILS存在的不足,提出了一种基于多新息广义扩展最小二乘算法(Multi-innovation Generalized Extended Least Square Algorithm,MIGELS)的水下机器人参数辨识方法。开展水下机器人运动学和动力学分析,建立水下机器人的运动方程。介绍MILS算法,在MILS算法基础上开展详细的MIGELS算法的数学推导过程,并给出完整的MIGELS算法的描述公式。搭建水下机器人在线参数辨识仿真平台,在线采集具有复杂噪声的观测数据,分别基于MILS算法和MIGELS算法开展参数辨识仿真实验。仿真结果表明,基于MIGELS算法的参数辨识方法能够有效地在线辨识出水下机器人的水动力系数,相较于MILS算法,MIGELS算法明显具有更好的辨识精度和收敛速度,表明在应对复杂噪声的参数辨识问题时MIGELS算法更具优势,这对于促进水下机器人的参数辨识研究具有重要的意义。
基金financially supported by the National Natural Science Foundation of China (62464010)Spring City Plan-Special Program for Young Talents (K202005007)+3 种基金the Yunnan Talents Support Plan for Yong Talents (XDYC-QNRC-2022-0482)Yunnan Local Colleges Applied Basic Research Projects (202101BA070001-138)Key Laboratory of Artificial Microstructures in Yunnan Higher Educationthe Frontier Research Team of Kunming University 2023
文摘Silicon-air(Si-air)batteries have received significant attention owing to their high theoretical energy density and safety profile.However,the actual energy density of the Si-air battery remains significantly lower than the theoretical value,primarily due to corrosion issues and passivation.This study used various metal-organic framework(MOF)materials,such as MIL-53(Al),MIL-88(Fe),and MIL-101(Cr),to modify Si anodes.The MOFs were fabricated to have different morphologies,particle sizes,and pore sizes by altering their central metal nodes and ligands.This approach aimed to modulate the adsorption behavior of H_(2)O,SiO_(2),and OH^(−),thereby mitigating corrosion and passivation reactions.Under a constant current of 150μA,Si-air batteries with MIL-53(Al)@Si,MIL-88(Fe)@Si,and MIL-101(Cr)@Si as anodes demonstrated lifetimes of 293,412,and 336 h,respectively,surpassing the 276 h observed with pristine silicon anodes.Among these composite anodes,MIL-88(Fe)@Si displayed the best performance due to its superior hydrophobicity and optimal pore size,which enhance OH^(−)migration.This study offers a promising strategy for enhancing Si-air battery performance by developing an anodic protective layer with selective screening properties.
文摘The authors regret<During the submission process,Hongxiang Zhang and Honggen Peng served as the first and the second corresponding author,respectively.The original manuscript submitted for this paper also listed two co-corresponding authors(Hongxiang Zhang and Honggen Peng).But the corresponding author of Honggen Peng was omitted in the final published manuscript.So,we apply to designate Honggen Peng(penghonggen@ncu.edu.cn)as the second co-corresponding author and the corresponding unit is“a,b">.
