Considering the uncertainty of material performance, geometric characteristic and analysis method, the analysis of statistical parameters of the resistance of cast ball-and-socket support joints and the reliability an...Considering the uncertainty of material performance, geometric characteristic and analysis method, the analysis of statistical parameters of the resistance of cast ball-and-socket support joints and the reliability analysis are carried out by JC method (improved first-order second-moment method) based on the relevant experimental data. Results show that the resistance partial factor of the joint increases with the increase of the reliability index. The resistance partial factors are suggested corresponding to the reliability index under different load combinations. Moreover, the suggested resistance partial factor is adopted in reliability design, and it is found that the reliability index of the joint is larger than the target reliability index. The optimal load combination is the one in which live load plays an important control role. Finally, based on the suggested resistance partial factors, the reliability analysis of cast ball-and-socket support joints of a project is conducted.展开更多
目的:探讨维持性血液透析患者心理脆弱现状及影响因素。方法:采用便利抽样方法选取2023年3—7月桂林医学院附属医院血液净化中心收治的380例维持性血液透析患者。收集所有患者一般资料,评价所有患者心理脆弱情况、社会支持情况。比较不...目的:探讨维持性血液透析患者心理脆弱现状及影响因素。方法:采用便利抽样方法选取2023年3—7月桂林医学院附属医院血液净化中心收治的380例维持性血液透析患者。收集所有患者一般资料,评价所有患者心理脆弱情况、社会支持情况。比较不同一般资料患者心理脆弱量表(mental vulnerability questionnaire,MVQ)评分,统计所有患者MVQ评分及领悟社会支持量表(perceived social support scale,PSSS)评分情况。分析维持性血液透析患者MVQ评分及PSSS评分相关性。分析维持性血液透析患者心理脆弱的影响因素。结果:不同文化程度、婚姻状况、居住情况、家庭人均月收入、透析时长、有无并发症患者MVQ评分比较,差异有统计学意义(P<0.05)。维持性血液透析患者心理脆弱呈中等水平,其各维度条目均分由高到低为人际问题、身心症状、精神症状;领悟社会支持呈中等水平。心理脆弱总分、身心症状、精神症状、人际问题评分与社会支持总分、家庭支持、朋友支持、其他支持评分均呈负相关(P<0.05)。居住情况、有无并发症、社会支持是维持性血液透析患者心理脆弱的主要影响因素(P<0.05)。结论:维持性血液透析患者心理脆弱呈中等水平,其中独居、伴有并发症、社会支持是维持性血液透析患者心理脆弱的主要影响因素,应积极制订有效性、针对性的干预措施帮助其降低心理脆弱程度,提高心理健康水平,从而提高生活质量。展开更多
基金Supported by National Natural Science Foundation of China (No.51078259)Seed Foundation of Tianjin University (No.2010XG-0013)Program for New Century Excellent Talents in University (No.1102010)
文摘Considering the uncertainty of material performance, geometric characteristic and analysis method, the analysis of statistical parameters of the resistance of cast ball-and-socket support joints and the reliability analysis are carried out by JC method (improved first-order second-moment method) based on the relevant experimental data. Results show that the resistance partial factor of the joint increases with the increase of the reliability index. The resistance partial factors are suggested corresponding to the reliability index under different load combinations. Moreover, the suggested resistance partial factor is adopted in reliability design, and it is found that the reliability index of the joint is larger than the target reliability index. The optimal load combination is the one in which live load plays an important control role. Finally, based on the suggested resistance partial factors, the reliability analysis of cast ball-and-socket support joints of a project is conducted.
文摘目的:探讨维持性血液透析患者心理脆弱现状及影响因素。方法:采用便利抽样方法选取2023年3—7月桂林医学院附属医院血液净化中心收治的380例维持性血液透析患者。收集所有患者一般资料,评价所有患者心理脆弱情况、社会支持情况。比较不同一般资料患者心理脆弱量表(mental vulnerability questionnaire,MVQ)评分,统计所有患者MVQ评分及领悟社会支持量表(perceived social support scale,PSSS)评分情况。分析维持性血液透析患者MVQ评分及PSSS评分相关性。分析维持性血液透析患者心理脆弱的影响因素。结果:不同文化程度、婚姻状况、居住情况、家庭人均月收入、透析时长、有无并发症患者MVQ评分比较,差异有统计学意义(P<0.05)。维持性血液透析患者心理脆弱呈中等水平,其各维度条目均分由高到低为人际问题、身心症状、精神症状;领悟社会支持呈中等水平。心理脆弱总分、身心症状、精神症状、人际问题评分与社会支持总分、家庭支持、朋友支持、其他支持评分均呈负相关(P<0.05)。居住情况、有无并发症、社会支持是维持性血液透析患者心理脆弱的主要影响因素(P<0.05)。结论:维持性血液透析患者心理脆弱呈中等水平,其中独居、伴有并发症、社会支持是维持性血液透析患者心理脆弱的主要影响因素,应积极制订有效性、针对性的干预措施帮助其降低心理脆弱程度,提高心理健康水平,从而提高生活质量。