为满足下一代移动通信空、天、地一体全球无缝覆盖,随时随地安全可靠人、机、物无限连接的需求,星地一体融合组网技术成为第6代移动通信技术(6th-Generation Mobile Communication Technology,6G)潜在关键技术之一。其中,如何实现手机...为满足下一代移动通信空、天、地一体全球无缝覆盖,随时随地安全可靠人、机、物无限连接的需求,星地一体融合组网技术成为第6代移动通信技术(6th-Generation Mobile Communication Technology,6G)潜在关键技术之一。其中,如何实现手机直接通过卫星进行通信成为产、学、研界关注的焦点。探讨了手机直连卫星面临的挑战及不同模式,介绍了相关商业项目进展,总结了目前需关注的问题,并为我国手机直连卫星产业的发展提出了相关启示建议。展开更多
【目的】分析评价双孢蘑菇野生种质创新杂交菌株的蛋白质和氨基酸营养成分,为利用野生种质选育营养价值更高的双孢蘑菇新菌株提供参考。【方法】以3个主栽品种为对照,测定分析了6个杂交新菌株的蛋白质与氨基酸含量,并参照WHO(World Heal...【目的】分析评价双孢蘑菇野生种质创新杂交菌株的蛋白质和氨基酸营养成分,为利用野生种质选育营养价值更高的双孢蘑菇新菌株提供参考。【方法】以3个主栽品种为对照,测定分析了6个杂交新菌株的蛋白质与氨基酸含量,并参照WHO(World Health Organization,世界卫生组织)/FAO(Food and Agriculture Organization of the UnitedNations,联合国粮食及农业组织)/UNU(UnitedNationsUniversity,联合国大学)、 IOM(Instituteof Medicine,美国医学研究所)、全鸡蛋蛋白3种氨基酸平衡模式谱,采用IOM模式评分、氨基酸评分、氨基酸比值系数、氨基酸比值系数分、化学评分等多种指标进行综合评价。【结果】野生种质创新杂交白色菌株福蘑63每百克蛋白质的必需氨基酸含量46.76 g、必需氨基酸指数94.45、必需氨基酸比例41.72%、消化率校正氨基酸得分86.73,在9个菌株中都是最高的。而野生种质创新杂交棕色菌株的蛋白质、总氨基酸、必需氨基酸、药用氨基酸、甜味氨基酸、碱性氨基酸、支链氨基酸以及多种氨基酸的含量均显著高于主栽品种。【结论】现有双孢蘑菇白色主栽品种的蛋白质、氨基酸等营养成分仍有提升的空间,可以引入营养价值相对较高的野生种质资源,基于营养成分评价开展营养品质定向杂交育种。展开更多
近年来,美国商务部国家标准与技术研究所(National Institute of Standards and Technology,NIST)陆续发布或更新了针对太空系统空间段、控制(地面)段、用户段等部分及混合太空网络的网络安全风险管理跨部门报告,以风险管理为基础,建立...近年来,美国商务部国家标准与技术研究所(National Institute of Standards and Technology,NIST)陆续发布或更新了针对太空系统空间段、控制(地面)段、用户段等部分及混合太空网络的网络安全风险管理跨部门报告,以风险管理为基础,建立了一个主要步骤为识别、保护、检测、响应和恢复的太空系统网络空间安全管理的框架。对该系列报告内容进行了介绍,并总结了对我国太空网络安全建设方面的启示。展开更多
In order to ensure the security of information systems, it's essential to make sure that system behaviors are trusted. By analyzing threats that exist in executing procedures, a trust model based on structured pro...In order to ensure the security of information systems, it's essential to make sure that system behaviors are trusted. By analyzing threats that exist in executing procedures, a trust model based on structured protection is proposed. We consider that functional components, system actions and message flows between components are three key factors of information systems. Structured protection requirements on components, connections and action parameters are also provided. Four trusted properties of the model are deducted through formal analysis, and trusted system behavior is defined based on these properties. Furthermore, decision theorem of trusted system behavior is proved. The developed prototype system indicates the model is practical. It is a general theory model built on logic deduction and independent on specific environment and the behaviors of the system designed and implemented following the model are trusted.展开更多
Typical isolation models are studied and a New Application Security Isolation model called NASI is proposed, which is based on trusted computing technology and least privilege principle. This paper introduces the desi...Typical isolation models are studied and a New Application Security Isolation model called NASI is proposed, which is based on trusted computing technology and least privilege principle. This paper introduces the design ideas of NASI, gives out formal description and safety analysis for the model, and finally describes the implementation of prototype system based on NASI.展开更多
Ninety wild strains of Agaricus collected in China,including 44 strains preliminarily identified as Agaricus bisporus by isozyme electrophoresis,were studied using SRAP and ISSR techniques.Eighteen specific SRAP bands...Ninety wild strains of Agaricus collected in China,including 44 strains preliminarily identified as Agaricus bisporus by isozyme electrophoresis,were studied using SRAP and ISSR techniques.Eighteen specific SRAP bands and 12 specific ISSR bands were scored,and a cluster dendrogram was constructed.The 90 wild strains of Agaricus were separated into two major groups,the first consisting of wild strains of A.bisporus and the second consisting of other Agaricus strains.Forty-one wild strains of A.bisporus collected in Sichuan and Tibet formed four groups according to the geographical location of the collection area.White A.bisporus strains from Xinjiang and Tibet(Xinjiang Wild,AgX04 and AgX042)exhibited unique band patterns resulting in lower similarity coefficient values(10%～13%)when compared with brown or light-brown A.bisporus strains.展开更多
发展了一种由锰介导的简易高效的Reformatsky催化体系.在便宜易得锰粉的介导下,实现了镍催化剂高效催化碘代乙酸乙酯与醛酮的Reformatsky反应.以乙腈为反应溶剂,温和条件下可获得高收率的Reformatsky加成产物(up to 98%).此外,该催化方...发展了一种由锰介导的简易高效的Reformatsky催化体系.在便宜易得锰粉的介导下,实现了镍催化剂高效催化碘代乙酸乙酯与醛酮的Reformatsky反应.以乙腈为反应溶剂,温和条件下可获得高收率的Reformatsky加成产物(up to 98%).此外,该催化方法学还可放大至克级规模.展开更多
文摘为满足下一代移动通信空、天、地一体全球无缝覆盖,随时随地安全可靠人、机、物无限连接的需求,星地一体融合组网技术成为第6代移动通信技术(6th-Generation Mobile Communication Technology,6G)潜在关键技术之一。其中,如何实现手机直接通过卫星进行通信成为产、学、研界关注的焦点。探讨了手机直连卫星面临的挑战及不同模式,介绍了相关商业项目进展,总结了目前需关注的问题,并为我国手机直连卫星产业的发展提出了相关启示建议。
文摘【目的】分析评价双孢蘑菇野生种质创新杂交菌株的蛋白质和氨基酸营养成分,为利用野生种质选育营养价值更高的双孢蘑菇新菌株提供参考。【方法】以3个主栽品种为对照,测定分析了6个杂交新菌株的蛋白质与氨基酸含量,并参照WHO(World Health Organization,世界卫生组织)/FAO(Food and Agriculture Organization of the UnitedNations,联合国粮食及农业组织)/UNU(UnitedNationsUniversity,联合国大学)、 IOM(Instituteof Medicine,美国医学研究所)、全鸡蛋蛋白3种氨基酸平衡模式谱,采用IOM模式评分、氨基酸评分、氨基酸比值系数、氨基酸比值系数分、化学评分等多种指标进行综合评价。【结果】野生种质创新杂交白色菌株福蘑63每百克蛋白质的必需氨基酸含量46.76 g、必需氨基酸指数94.45、必需氨基酸比例41.72%、消化率校正氨基酸得分86.73,在9个菌株中都是最高的。而野生种质创新杂交棕色菌株的蛋白质、总氨基酸、必需氨基酸、药用氨基酸、甜味氨基酸、碱性氨基酸、支链氨基酸以及多种氨基酸的含量均显著高于主栽品种。【结论】现有双孢蘑菇白色主栽品种的蛋白质、氨基酸等营养成分仍有提升的空间,可以引入营养价值相对较高的野生种质资源,基于营养成分评价开展营养品质定向杂交育种。
文摘近年来,美国商务部国家标准与技术研究所(National Institute of Standards and Technology,NIST)陆续发布或更新了针对太空系统空间段、控制(地面)段、用户段等部分及混合太空网络的网络安全风险管理跨部门报告,以风险管理为基础,建立了一个主要步骤为识别、保护、检测、响应和恢复的太空系统网络空间安全管理的框架。对该系列报告内容进行了介绍,并总结了对我国太空网络安全建设方面的启示。
基金supported by National Science and Technology Major Project under Grant No.2012ZX03002003Funds of Key Lab of Fujian Province University Network Security and Cryptology under Grant No.2011009Open Research Project of State Key Laboratory of Information Security in Institute of Software,Chinese Academy of Sciences
文摘In order to ensure the security of information systems, it's essential to make sure that system behaviors are trusted. By analyzing threats that exist in executing procedures, a trust model based on structured protection is proposed. We consider that functional components, system actions and message flows between components are three key factors of information systems. Structured protection requirements on components, connections and action parameters are also provided. Four trusted properties of the model are deducted through formal analysis, and trusted system behavior is defined based on these properties. Furthermore, decision theorem of trusted system behavior is proved. The developed prototype system indicates the model is practical. It is a general theory model built on logic deduction and independent on specific environment and the behaviors of the system designed and implemented following the model are trusted.
文摘Typical isolation models are studied and a New Application Security Isolation model called NASI is proposed, which is based on trusted computing technology and least privilege principle. This paper introduces the design ideas of NASI, gives out formal description and safety analysis for the model, and finally describes the implementation of prototype system based on NASI.
基金Supported by National Fund of Natural Sciences(No.30671456,30771503)Key Science & Technology Programsof Fujian Province(No.2006S1001)+1 种基金Fujian Fund of Natural Sciences(No.B0620004)Key S&T InnovationItems of Fujian Academy of Agricultural Sciences(2007)
文摘Ninety wild strains of Agaricus collected in China,including 44 strains preliminarily identified as Agaricus bisporus by isozyme electrophoresis,were studied using SRAP and ISSR techniques.Eighteen specific SRAP bands and 12 specific ISSR bands were scored,and a cluster dendrogram was constructed.The 90 wild strains of Agaricus were separated into two major groups,the first consisting of wild strains of A.bisporus and the second consisting of other Agaricus strains.Forty-one wild strains of A.bisporus collected in Sichuan and Tibet formed four groups according to the geographical location of the collection area.White A.bisporus strains from Xinjiang and Tibet(Xinjiang Wild,AgX04 and AgX042)exhibited unique band patterns resulting in lower similarity coefficient values(10%～13%)when compared with brown or light-brown A.bisporus strains.
