In this study, a new R-δf-type welding window on charge parameters is constructed by determining the boundary conditions of the explosive ratio. The R-δf-type welding window synthetically considers the explosive pro...In this study, a new R-δf-type welding window on charge parameters is constructed by determining the boundary conditions of the explosive ratio. The R-δf-type welding window synthetically considers the explosive properties and material properties, and can quickly determine the explosive charge at different welding materials with different thickness. In order to test the practicability and accuracy of the R-δf-type welding window, 410S stainless steel and Q345R low alloy steel plates were explosively welded using 15 mm charge determined by the new window. Microstructures of the bonded sections were examined and then shear tests were carried out on the bonded specimens. Microstructural examination showed the joint interface was transformed from micro wavy to small wavy appearance without microstructure defects. Shear tests results showed inter inacial shear strength was much higher than that of the national first grade standard. So the R-δf-type welding window has strong practicability and accuracy and is helpful to the practical production and application of explosive welding composite materials.展开更多
目的评估6种常用肌少症初筛方法对2型糖尿病(type 2 diabetes,T2DM)患者肌少症发生风险的预测效果。方法研究对象为来自临沂市人民医院的790例T2DM患者。通过收集患者的一般资料、测量骨骼肌质量和其他人体体成分标志物,并进行问卷调查...目的评估6种常用肌少症初筛方法对2型糖尿病(type 2 diabetes,T2DM)患者肌少症发生风险的预测效果。方法研究对象为来自临沂市人民医院的790例T2DM患者。通过收集患者的一般资料、测量骨骼肌质量和其他人体体成分标志物,并进行问卷调查,评估了简易五项评分问卷(Strength,Assistance with walking,Rise from a chair,Climb stairs,and Falls,SARC-F)、小腿周径、肌少症评估表(SARC-F with Calf circumference,SARC-CalF)、迷你肌少症风险评估表(Mini Sarcopenia Risk Assessment,MSRA)-5、MSRA评分-7和简易物理性能测验(Short Physical Performance Battery,SPPB)对T2DM患者肌少症的预测效果。结果随机森林(重要性0.147)和多因素Logistic回归分析结果显示SARC-CalF评分对T2DM患者肌少症的诊断具有较好的预测效果(SARC-CalF评分,OR=1.24,95%CI:1.17~1.31)。ROC曲线分析显示SARC-CalF评分的预测效果较好,曲线下面积(area under curve,AUC)为0.84,敏感度为80.00%,特异度为87.12%。SARC-CalF评分联合握力和6 m步速可以进一步提高预测效果(AUC=0.94,敏感度=88.00%,特异度=88.26%)(Z=5.15,P<0.001)。结论SARC-CalF评分作为肌少症初筛方法在T2DM患者中具有较好的应用价值,并且联合握力和6 m步速可以进一步提高预测效果,这为早期筛查和干预T2DM患者肌少症提供了依据,有助于改善患者的生活质量。展开更多
基金supported by the National Natural Science Foundation of China(Grant No.51541112)
文摘In this study, a new R-δf-type welding window on charge parameters is constructed by determining the boundary conditions of the explosive ratio. The R-δf-type welding window synthetically considers the explosive properties and material properties, and can quickly determine the explosive charge at different welding materials with different thickness. In order to test the practicability and accuracy of the R-δf-type welding window, 410S stainless steel and Q345R low alloy steel plates were explosively welded using 15 mm charge determined by the new window. Microstructures of the bonded sections were examined and then shear tests were carried out on the bonded specimens. Microstructural examination showed the joint interface was transformed from micro wavy to small wavy appearance without microstructure defects. Shear tests results showed inter inacial shear strength was much higher than that of the national first grade standard. So the R-δf-type welding window has strong practicability and accuracy and is helpful to the practical production and application of explosive welding composite materials.
文摘目的评估6种常用肌少症初筛方法对2型糖尿病(type 2 diabetes,T2DM)患者肌少症发生风险的预测效果。方法研究对象为来自临沂市人民医院的790例T2DM患者。通过收集患者的一般资料、测量骨骼肌质量和其他人体体成分标志物,并进行问卷调查,评估了简易五项评分问卷(Strength,Assistance with walking,Rise from a chair,Climb stairs,and Falls,SARC-F)、小腿周径、肌少症评估表(SARC-F with Calf circumference,SARC-CalF)、迷你肌少症风险评估表(Mini Sarcopenia Risk Assessment,MSRA)-5、MSRA评分-7和简易物理性能测验(Short Physical Performance Battery,SPPB)对T2DM患者肌少症的预测效果。结果随机森林(重要性0.147)和多因素Logistic回归分析结果显示SARC-CalF评分对T2DM患者肌少症的诊断具有较好的预测效果(SARC-CalF评分,OR=1.24,95%CI:1.17~1.31)。ROC曲线分析显示SARC-CalF评分的预测效果较好,曲线下面积(area under curve,AUC)为0.84,敏感度为80.00%,特异度为87.12%。SARC-CalF评分联合握力和6 m步速可以进一步提高预测效果(AUC=0.94,敏感度=88.00%,特异度=88.26%)(Z=5.15,P<0.001)。结论SARC-CalF评分作为肌少症初筛方法在T2DM患者中具有较好的应用价值,并且联合握力和6 m步速可以进一步提高预测效果,这为早期筛查和干预T2DM患者肌少症提供了依据,有助于改善患者的生活质量。
