目的:对中国脑卒中病人营养风险的检出率进行系统评价与Meta分析。方法:计算机检索中国知网(CNKI)、维普数据库(VIP)、万方数据库(WanFang Database)、中国生物医学文献数据库(CBM)、PubMed、EMbase、Web of Science,收集从建库至2023年...目的:对中国脑卒中病人营养风险的检出率进行系统评价与Meta分析。方法:计算机检索中国知网(CNKI)、维普数据库(VIP)、万方数据库(WanFang Database)、中国生物医学文献数据库(CBM)、PubMed、EMbase、Web of Science,收集从建库至2023年4月30日关于中国脑卒中病人营养风险检出率的横断面研究。由2名研究者独立筛选文献、提取资料并评价纳入研究的偏倚风险,采用Stata 15.1软件进行Meta分析。结果:共纳入35项横断面研究,涉及9 616例脑卒中病人,其中3 975例存在营养风险,中国脑卒中病人营养风险总检出率为42.5%[95%CI(37.7%,47.4%)],亚组分析结果显示,男性和女性脑卒中病人营养风险检出率分别为50.0%、53.2%;60岁以下、60岁及以上脑卒中病人营养风险检出率分别为27.4%、47.7%;就脑卒中类型而言,缺血性脑卒中和出血性脑卒中病人营养风险检出率分别为50.1%、52.1%;首次发生脑卒中病人营养风险检出率(45.1%)低于有脑卒中病史病人(57.2%);合并吞咽困难脑卒中病人营养风险检出率(60.5%)高于未合并吞咽困难的脑卒中病人(34.9%);使用营养风险筛查2002、微型营养评估表、微型营养评价精法及营养不良通用筛查工具检测出脑卒中病人营养风险发生率分别为45.3%、23.3%、41.3%、42.3%。结论:我国脑卒中病人营养风险的检出率较高,不同亚组间脑卒中病人营养风险检出率存在差异。展开更多
A study of the interfacial behavior and internal thermal stress distribution in fiber-reinforced composites is essential to assess their performance and reliability.CNT/carbon fiber(CF)hybrid fibers were constructed u...A study of the interfacial behavior and internal thermal stress distribution in fiber-reinforced composites is essential to assess their performance and reliability.CNT/carbon fiber(CF)hybrid fibers were constructed using electrophoretic deposition.The interfacial properties of CF/epoxy and CNT/CF/epoxy composites were statistically investigated and compared using in-situ thermal Raman mapping by dispersing CNTs as a Raman sensing medium(CNT_(R))in a resin.The associated local thermal stress changes can be simulated by capturing the G'band position distribution of CNT_(R) in the epoxy at different temperatures.It was found that the G'band shifted to lower positions with increasing temperature,reaching a maximum difference of 2.43 cm^(−1) at 100℃.The interfacial bonding between CNT/CF and the matrix and the stress distribution and changes during heat treatment(20-100℃)were investig-ated in detail.This work is important for studying thermal stress in fiber-reinforced composites by in-situ thermal Raman mapping technology.展开更多
文摘A study of the interfacial behavior and internal thermal stress distribution in fiber-reinforced composites is essential to assess their performance and reliability.CNT/carbon fiber(CF)hybrid fibers were constructed using electrophoretic deposition.The interfacial properties of CF/epoxy and CNT/CF/epoxy composites were statistically investigated and compared using in-situ thermal Raman mapping by dispersing CNTs as a Raman sensing medium(CNT_(R))in a resin.The associated local thermal stress changes can be simulated by capturing the G'band position distribution of CNT_(R) in the epoxy at different temperatures.It was found that the G'band shifted to lower positions with increasing temperature,reaching a maximum difference of 2.43 cm^(−1) at 100℃.The interfacial bonding between CNT/CF and the matrix and the stress distribution and changes during heat treatment(20-100℃)were investig-ated in detail.This work is important for studying thermal stress in fiber-reinforced composites by in-situ thermal Raman mapping technology.
