目的:探索中国中老年人听力损失与抑郁症状的纵向关联,为中老年人抑郁的预防提供依据。方法:采用中国健康与养老追踪调查(China Health and Retirement Longitudinal Study,CHARLS)2011至2020年中参加2次及以上的受访者数据。听力损失...目的:探索中国中老年人听力损失与抑郁症状的纵向关联,为中老年人抑郁的预防提供依据。方法:采用中国健康与养老追踪调查(China Health and Retirement Longitudinal Study,CHARLS)2011至2020年中参加2次及以上的受访者数据。听力损失通过自我报告进行评估,抑郁症状通过简版流调用抑郁自评量表(CESD-10)量表进行测量。采用K-M曲线和log-rank检验比较不同分组间发生抑郁症状的风险。采用Cox比例风险回归模型探索听力损失与抑郁症状的纵向关联。结果:研究共纳入12 952例研究对象。基线时1 416(10.9%)例研究对象自报听力损失。在中位随访时间为5.42年的随访中,5 498例研究对象出现抑郁症状。在未调整模型中,基线时的听力损失组发生抑郁症状的风险是无听力损失组的1.34倍(P<0.05),逐步调整社会人口学因素、行为生活方式因素及健康相关因素后,基线时的听力损失仍是抑郁症状的危险因素(HR=1.21,95%CI=1.10~1.34)。结论:听力损失会增加抑郁症状的发生风险,对听力损失进行干预可有效降低抑郁症状的发生。展开更多
To enhance the catalytic activity of copper ferrite(CuFe_(2)O_(4))nanoparticle and promote its application as combustion catalyst,a low-cost silicon dioxide(SiO_(2))carrier was employed to construct a novel CuFe_(2)O_...To enhance the catalytic activity of copper ferrite(CuFe_(2)O_(4))nanoparticle and promote its application as combustion catalyst,a low-cost silicon dioxide(SiO_(2))carrier was employed to construct a novel CuFe_(2)O_(4)/SiO_(2)binary composites via solvothermal method.The phase structure,morphology and catalytic activity of CuFe_(2)O_(4)/SiO_(2)composites were studied firstly,and thermal decomposition,combustion and safety performance of ammonium perchlorate(AP)and 1,3,5-trinitroperhydro-1,3,5-triazine(RDX)with it affecting were then systematically analyzed.The results show that CuFe_(2)O_(4)/SiO_(2)composite can remarkably either advance the decomposition peak temperature of AP and RDX,or reduce the apparent activation energy at their main decomposition zone.Moreover,the flame propagation rate of RDX was promoted by about 2.73 times with SiO_(2)content of 3 wt%,and safety property of energetic component was also improved greatly,in which depressing the electrostatic discharge sensitivity of pure RDX by about 1.89 times.In addition,the effective range of SiO_(2)carrier content in the binary catalyst is found to be 3 to 5 wt%.Therefore,SiO_(2)opens a new insight on the design of combustion catalyst carrier and will promote the application of CuFe_(2)O_(4)catalyst in solid propellant.展开更多
文摘目的:探索中国中老年人听力损失与抑郁症状的纵向关联,为中老年人抑郁的预防提供依据。方法:采用中国健康与养老追踪调查(China Health and Retirement Longitudinal Study,CHARLS)2011至2020年中参加2次及以上的受访者数据。听力损失通过自我报告进行评估,抑郁症状通过简版流调用抑郁自评量表(CESD-10)量表进行测量。采用K-M曲线和log-rank检验比较不同分组间发生抑郁症状的风险。采用Cox比例风险回归模型探索听力损失与抑郁症状的纵向关联。结果:研究共纳入12 952例研究对象。基线时1 416(10.9%)例研究对象自报听力损失。在中位随访时间为5.42年的随访中,5 498例研究对象出现抑郁症状。在未调整模型中,基线时的听力损失组发生抑郁症状的风险是无听力损失组的1.34倍(P<0.05),逐步调整社会人口学因素、行为生活方式因素及健康相关因素后,基线时的听力损失仍是抑郁症状的危险因素(HR=1.21,95%CI=1.10~1.34)。结论:听力损失会增加抑郁症状的发生风险,对听力损失进行干预可有效降低抑郁症状的发生。
基金the National Nature Science Foundation of China(Grant Nos.21673178,22105160)the Natural Science Foundation of Shaanxi Province(Grant No.2023-JC-ZD-07)+1 种基金the Foundation of Key Laboratory of Defense Science and technology(Grant No.6142603032213)the Key Science and Technology Innovation Team of Shaanxi Province(Grant No.2022TD-33).
文摘To enhance the catalytic activity of copper ferrite(CuFe_(2)O_(4))nanoparticle and promote its application as combustion catalyst,a low-cost silicon dioxide(SiO_(2))carrier was employed to construct a novel CuFe_(2)O_(4)/SiO_(2)binary composites via solvothermal method.The phase structure,morphology and catalytic activity of CuFe_(2)O_(4)/SiO_(2)composites were studied firstly,and thermal decomposition,combustion and safety performance of ammonium perchlorate(AP)and 1,3,5-trinitroperhydro-1,3,5-triazine(RDX)with it affecting were then systematically analyzed.The results show that CuFe_(2)O_(4)/SiO_(2)composite can remarkably either advance the decomposition peak temperature of AP and RDX,or reduce the apparent activation energy at their main decomposition zone.Moreover,the flame propagation rate of RDX was promoted by about 2.73 times with SiO_(2)content of 3 wt%,and safety property of energetic component was also improved greatly,in which depressing the electrostatic discharge sensitivity of pure RDX by about 1.89 times.In addition,the effective range of SiO_(2)carrier content in the binary catalyst is found to be 3 to 5 wt%.Therefore,SiO_(2)opens a new insight on the design of combustion catalyst carrier and will promote the application of CuFe_(2)O_(4)catalyst in solid propellant.
