Carbon material is an important additive in energetic materials.Graphene is a monolayer carbon material in which carbon atoms are arranged in two-dimensional honeycomb structure,who has special optical,electrical,and ...Carbon material is an important additive in energetic materials.Graphene is a monolayer carbon material in which carbon atoms are arranged in two-dimensional honeycomb structure,who has special optical,electrical,and mechanical properties.Recently,the application of graphene-based composites in energetic materials has received extensive attention.This review mainly summarizes the applications of graphene and graphene-based nanomaterials in energetic materials.The effects of these materials on the thermal stability,sensitivity,mechanical property,ignition and combustion of energetic materials were discussed.Furthermore,the progress of functionalized modification of graphene has been summarized,including covalent bonding modification and doping modification.These studies show that graphenebased materials exhibit excellent performances and might emerge as promising candidate for energetic materials.展开更多
目的:采用Meta分析评价含锶脱敏牙膏对牙本质过敏症(DH)的治疗效果,为临床治疗提供参考。方法:收集1990年1月1日至2020年3月1日PubMed,EMBASE,Web of Science,CENTRAL和CNKI等数据库关于研究含锶脱敏牙膏对DH的随机对照试验(RCT)文献,运...目的:采用Meta分析评价含锶脱敏牙膏对牙本质过敏症(DH)的治疗效果,为临床治疗提供参考。方法:收集1990年1月1日至2020年3月1日PubMed,EMBASE,Web of Science,CENTRAL和CNKI等数据库关于研究含锶脱敏牙膏对DH的随机对照试验(RCT)文献,运用Stata 14.0软件对提取的所有文献数据进行Meta分析。结果:共纳入8篇RCT文献,根据8项研究的最长试验周期,对含锶脱敏牙膏和对照组牙膏干预后进行探诊及空气喷吹检测差异进行Meta分析,试验组与对照组在探诊、空气检测敏感值之间比较,差异均无统计学意义(P>0.05);根据试验时间长短、结局指标分类,分别合并即刻、≤1、2、4、6、8、12周的探诊敏感、空气检测敏感值进行亚组分析,结果显示试验组与对照组在探诊、空气检测敏感值之间比较,差异均无统计学意义(P>0.05)。结论:含锶脱敏牙膏和对照组牙膏相比,不能更有效地减轻DH,需要更多的研究来进一步验证其对缓解DH的效果。展开更多
文中详述了行业气象服务中,通过对接CIMISS(China Integrated Meteorological Information Service System)及云平台应用实现的数据服务和可视化服务流程。文中通过替换非公开国家站数据及观测要素不同范围的随机偏移保障了气象观测数...文中详述了行业气象服务中,通过对接CIMISS(China Integrated Meteorological Information Service System)及云平台应用实现的数据服务和可视化服务流程。文中通过替换非公开国家站数据及观测要素不同范围的随机偏移保障了气象观测数据的安全性;在对接CIMISS时,通过对不同类型的数据设计对应的补调流程,保证了服务数据和数据源的高度一致性;最后,在稳定统一的底层数据环境基础上,根据交通行业用户的需求,采用B/S模式设计实现了交通三要素展示系统,为行业用户提供了较好的数据和服务支持,切实提高了行业用户的决策效率。展开更多
基金funding support from Startup Foundation for Docotors of Yan’an University(Grant No.YAU205040372)Project of Science and Technology Office of Shaanxi Province(Grant No.2023-JC-QN-0152)。
文摘Carbon material is an important additive in energetic materials.Graphene is a monolayer carbon material in which carbon atoms are arranged in two-dimensional honeycomb structure,who has special optical,electrical,and mechanical properties.Recently,the application of graphene-based composites in energetic materials has received extensive attention.This review mainly summarizes the applications of graphene and graphene-based nanomaterials in energetic materials.The effects of these materials on the thermal stability,sensitivity,mechanical property,ignition and combustion of energetic materials were discussed.Furthermore,the progress of functionalized modification of graphene has been summarized,including covalent bonding modification and doping modification.These studies show that graphenebased materials exhibit excellent performances and might emerge as promising candidate for energetic materials.
文摘目的:采用Meta分析评价含锶脱敏牙膏对牙本质过敏症(DH)的治疗效果,为临床治疗提供参考。方法:收集1990年1月1日至2020年3月1日PubMed,EMBASE,Web of Science,CENTRAL和CNKI等数据库关于研究含锶脱敏牙膏对DH的随机对照试验(RCT)文献,运用Stata 14.0软件对提取的所有文献数据进行Meta分析。结果:共纳入8篇RCT文献,根据8项研究的最长试验周期,对含锶脱敏牙膏和对照组牙膏干预后进行探诊及空气喷吹检测差异进行Meta分析,试验组与对照组在探诊、空气检测敏感值之间比较,差异均无统计学意义(P>0.05);根据试验时间长短、结局指标分类,分别合并即刻、≤1、2、4、6、8、12周的探诊敏感、空气检测敏感值进行亚组分析,结果显示试验组与对照组在探诊、空气检测敏感值之间比较,差异均无统计学意义(P>0.05)。结论:含锶脱敏牙膏和对照组牙膏相比,不能更有效地减轻DH,需要更多的研究来进一步验证其对缓解DH的效果。
文摘文中详述了行业气象服务中,通过对接CIMISS(China Integrated Meteorological Information Service System)及云平台应用实现的数据服务和可视化服务流程。文中通过替换非公开国家站数据及观测要素不同范围的随机偏移保障了气象观测数据的安全性;在对接CIMISS时,通过对不同类型的数据设计对应的补调流程,保证了服务数据和数据源的高度一致性;最后,在稳定统一的底层数据环境基础上,根据交通行业用户的需求,采用B/S模式设计实现了交通三要素展示系统,为行业用户提供了较好的数据和服务支持,切实提高了行业用户的决策效率。
