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China CDC weekly 2022年第42期4卷 941-944页

作者： Yue Wei Heming Pei Jinlong Lin xiaojin yan Gong Chen Institute of Population Research Peking UniversityBeijingChina

Summary What is already known about this topic?Earlier studies indicated that shorter or excessive sleep duration at baseline was related to cognitive *** few studies have been concerned with the association between sleep duration changes and cognitive performance,especially in low-and middleincome *** is added by this report?A prospective cohort study suggests that maintaining moderate sleep duration may lead to optimal cognitive *** decreasing,increasing,or keeping a longer sleep duration is associated with the risk of cognitive impairment among Chinese elderly aged 65 years and over.

关键词： impairment income concerned

Association Between Physical Activity and Physical Fitness Among Adults Aged 40 to 79 Years—Beijing,China,2020–2021

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China CDC weekly 2022年第42期4卷 936-940页

作者： xiaojin yan Heming Pei Yalu Zhang Ning Kang Gong Chen Dongmin Wang Institute of Population Research Peking UniversityBeijingChina Department of Physical Education Peking UniversityBeijingChina

Summary What is already known about this topic?Physical fitness is well documented to be associated with physical activity among adults in the United *** China,research on this association places a heavier emphasis on the populations of children and *** is added by this report?Physical fitness was shown to be positively associated with physical activity among adults aged 40 to 79 years in *** populations with lower levels of physical fitness,this association was *** coefficients of the log-transformed metabolic equivalent value of physical activity(logPA)in quantile regression models at the 25th,50th,75th,and 90th percentile of the physical fitness indicators were 1.14,1.04,0.89,and 0.84,respectively.

关键词： Physical logP transformed

Trends in the Prevalence of Cognitive Impairment Among Older Adults Aged 65 to 105 Years—China,2002–2018

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China CDC weekly 2022年第42期4卷 945-949页

作者： xiaojin yan Shiqi Lin Jiajia Li Hao Cheng Xiangguo Liu Lijun Pei Institute of Population Research Peking UniversityBeijingChina National Academy of Innovation Strategy China Association for Science and TechnologyBeijingChina

Introduction:This study aims to analyze trends and subgroup differences in the prevalence of cognitive impairment among older Chinese adults aged 65–105 years from 2002 to ***:Data were drawn from six waves of the Chinese Longitudinal Healthy Longevity Survey(CLHLS).Cognitive function was measured using the Chinese version of the Mini-Mental State Examination(CMMSE).Cognitive impairment was determined by the total CMMSE score and educational attainment of *** generalized estimating equation(GEE)models with a logistic link and binominal distribution were performed to assess the secular trend in the ***:The prevalence of cognitive impairment among older adults aged 65–105 years decreased from 3.44%[95%confidence interval(CI):3.15%–3.73%]in 2002 to 2.41%(95%CI:2.17%–2.65%)in 2018 in *** prevalence was slightly higher in women than in men in 2002(3.71%vs.3.13%,P<0.05),and there was no significant difference between women and men in 2018(2.60%vs.2.21%,P=0.12).Rural older adults had a higher prevalence of cognitive impairment before 2014,but their urban counterparts had a higher prevalence in 2018(2.75%vs.2.06%,P<0.05).The GEE regression model showed that each successive year was associated with a 3%reduction in the odds of the prevalence of cognitive impairment[odds ratio(OR)=0.97;95%CI:0.97–0.97;P<0.05].Conclusions:The prevalence of cognitive impairment among Chinese older adults aged 65–105 years declined slowly from 2002 to *** gender,urban-rural,age,and regional differences in the prevalence of cognitive impairment changed over time.

关键词： slowly nominal successive

Phase Behaviors of Multi-tailed B_(2)AB_(2)-Type Regio-isomeric Giant Surfactants at the Columnar-Spherical Boundary

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Chinese Journal of Chemistry 2021年第12期39卷 3261-3268页

作者： Yu Shao Di Han xiaojin yan Bo Hou Yiwen Li Jinlin He Qiang Fu Wen-Bin Zhang Beijing National Laboratory for Molecular Sciences Key Laboratory of Polymer Chemistry&Physics of Ministry of EducationCenter for Soft Matter Science and EngineeringCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China College of Polymer Science&Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengduSichuan 610065China College of Chemistry Chemical Engineering and Materials ScienceState and Local Joint Engineering Laboratory for Novel Functional Polymeric MaterialsJiangsu Key Laboratory of Advanced Functional Polymer Design and ApplicationSuzhou Key Laboratory of Macromolecular Design and Precision SynthesisSoochow UniversitySuzhouJiangsu 215123China

We report herein the precision synthesis and phase behaviors of multi-tailed B_(2)AB_(2)-type regio-isomeric giant surfactants consisting of a hydrophilic polyhedral oligomeric silsesquioxane(POSS)head tethered with four hydrophobic polystyrene(PS)*** synthesis was accomplished through two sequential"click"reactions to give a series of regio-isomeric giant surfactants S2DS2(where S is short for PS tails and D for hydroxyl-functionalized POSS)in para-,meta-,and *** phase structures and phase be-haviors at the columnar-spherical boundary were investigated with a single PS tail molecular weight of 1.4 ***,the para-and meta-isomers show hexagonally packed cylinders phases with slightly different order-disorder transition temperatures(~120℃ and~130℃)and the ortho-isomer exhibits an order-order transition from a kinetically favored,metastable dodecagonal quasi-crystal phase to a thermodynamically stable sigma phase at~120℃,as well as a further transition into the disordered state at~140℃.The phase diagram was constructed and their differences were rationalized based on the calculated interfacial area per *** work demonstrates that tiny structural disparity could not only lead to unconventional phase formation in single-component macro-molecules,but also render dynamic and rich phase behaviors in these macromolecular assemblies.

关键词： Isomers Self-assembly Giant surfactants Phase transitions Frank-Kasper phase

Synergistic promotion strategy of “dual-site” and “dual-path” to enhance the C–C coupling between CO2 and HCHO driven by photoelectrocatalysis

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Journal of Energy Chemistry 2025年第1期100卷 39-49页

作者： Hongqiang yang Jianfeng Zheng Guoyu Wang Yifei Gao Yatao yang Jia Li xiaojin Han yan Cui Zhanggen Huang National Key Laboratory of High Efficiency and Low Carbon Utilization of Coal Institute of Coal Chemistry Chinese Academy of Science University of Chinese Academy of Science Shenyang University of Chemical Technology

Photoelectrocatalytic coupling CO2and volatile organic compounds （VOCs） is a promising green strategy for the synergistic conversion of the two carbon-containing resources to *** catalytic efficiency is always at the mercy of chemical inertness of CO2and the competitive hydrogen evolution of ***,a modified g-C3N4/ZnAl-LDH Z-scheme heterojunction catalyst with dual reaction site was rationally designed and precisely *** Faraday efficiency of ethanol reached 68.67%with a corresponding formation rate of 227.3μmol *** revealed by in-situ characterizations and density functional theory calculations,CO2and HCHO were absorbed at Zn site and N site,***,*CO generated from CO2and HCHO was converted to*CH3O and*CHO on the dual-active-site *** detailed reaction mechanism experiments indicated that C–C coupling only occurred between*CO and*CH3O in electrocatalysis *** from the“*CO+*CH3O”path,another“*CO+*CHO”coupling path was also detected in photoelectrocatalytic *** selectivity of ethanol was significantly enhanced due to the synthesis of dual-site catalyst and the dual-path coupling path between CO2and HCHO simultaneously driven by light and electricity.

关键词： Ethanol

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独立光伏发电混合储能系统功率转换控制研究

可再生能源 2020年第10期38卷 1368-1374页

作者：闫晓金北华航天工业学院研究生教学部河北廊坊065000

超级电容与蓄电池构成的混合储能系统,可以实现高效收集独立光伏发电系统能量,还能避免蓄电池充放电的电流大幅波动。文章根据光伏电池、蓄电池和超级电容混合储能单元、负载三者之间的功率转换关系,分析了独立光伏发电混合储能系统的... 详细信息

超级电容与蓄电池构成的混合储能系统,可以实现高效收集独立光伏发电系统能量,还能避免蓄电池充放电的电流大幅波动。文章根据光伏电池、蓄电池和超级电容混合储能单元、负载三者之间的功率转换关系,分析了独立光伏发电混合储能系统的基本工作模态,提出了一种基于SOC模糊控制的混合储能系统功率分配策略。控制超级电容快速平抑系统的功率波动,可使蓄电池基本处于恒流充放电状态,优化混合储能系统的功率特性。通过搭建Simulink仿真平台验证的结果表明,功率分配控制策略能够有效控制独立光伏发电混合储能系统的能量转换,抑制光伏电池和负载功率变化对储能系统的影响,保持直流母线电压稳定,并优化了蓄电池的工作状态。

关键词：混合储能光伏发电模糊控制荷电状态

基于卡尔曼滤波的同步盲系统辨识与解卷积方法

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信号处理 2020年第11期36卷 1877-1884页

作者：梅铁民闫晓瑾沈阳理工大学自动化与电气工程学院辽宁沈阳110159

在盲信道均衡或盲语音去混响应用中,盲多信道系统辨识通常是信号解卷积的前提条件,即盲辨识过程后跟一个解卷积过程。本文提出一种基于卡尔曼滤波的同步盲系统辨识与解卷积方法,其中卡尔曼滤波的状态矢量由多信道系统参数与源信号矢量组... 详细信息

在盲信道均衡或盲语音去混响应用中,盲多信道系统辨识通常是信号解卷积的前提条件,即盲辨识过程后跟一个解卷积过程。本文提出一种基于卡尔曼滤波的同步盲系统辨识与解卷积方法,其中卡尔曼滤波的状态矢量由多信道系统参数与源信号矢量组成,过程方程和测量方程则建立在单输入-多输出系统(SIMO)的输入输出关系及信道间交叉关联关系(Cross Relation)基础上。此外,盲系统辨识部分与解卷积部分是可以解耦的,生成两个看似独立的卡尔曼滤波问题,并且这两个卡尔曼滤波问题可以实现并行计算。与级联结构相比,这种并行结构更有利于算法优化和实时信号处理。仿真表明,对于无噪声理想信号模型,本算法可以实现完全系统辨识和解卷积(信号误差比可达到100 dB以上),说明理论正确;对于实测的混响语音信号亦可以实现一定的去混响效果。

关键词：盲系统辨识解卷积同步卡尔曼滤波并行结构

Global trends and regional differences in non-transport unintentional injuries mortality among children and adolescents, 1990 to 2019: results from the Global Burden of Disease 2019 study

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Chinese Medical Journal 2022年第17期135卷 2056-2065页

作者： Yunfei Liu yanhui Dong xiaojin yan Ning Ma Jiajia Dang Jingshu Zhang Panliang Zhong Luo Li Zhiyong Zou Yi Song Jun Ma Institute of Child and Adolescent Health School of Public HealthPeking UniversityBeijing 100191China The University of Melbourne Melbourne School of Population and Global HealthParkvileVIC 3010Australia

Background::Non-transport unintentional injuries(NTUIs)are major public concerns,especially among children and adolescents in low-and middle-income *** environmental and cognitive changes,a recent systematic description of global trends and regional differences concerning NTUIs is urgently needed for the global agenda of relevant policy-making and intervention target ***::We used mortality,population,and socio-demographic-index(SDI)data from Global Burden of Disease 2019 to analyze the trends of NTUIs *** applied the slope index of inequality(SII)and relative index of inequality(RII)to measure the absolute and relative inequality between countries and *** concentration curve and concentration index(CI)were also used to measure the *** conducted a sensitivity analysis to make our findings ***::In 2019,there were 205,000 deaths due to NTUIs among children and adolescents aged 5 to 24 years,which decreased from 375,000 in *** 2019,the age-standardized mortality rate(ASMR)was 8.13 per 100,000,ranging from the lowest in the Netherlands(0.90 per 100,000)to the highest in the Solomon Islands(29.34 per 100,000).The low-middle SDI group had the highest ASMR of NTUIs,while the low SDI group had the slowest *** excluding the death caused by"exposure to forces of nature"and"other unintentional injuries",drowning accounted for the most deaths in almost every SDI group,gender,and age group,but the major causes of death varied in different *** example,animal contact was a major cause in low and low-middle SDI groups but less in high SDI groups,while high and high-middle SDI groups had a higher proportion of deaths for foreign body and *** SII showed a declining trend,but the RII and CI did not,which might indicate that inequality was *** results were found in the sensitivity ***::Despite the declining trend of the mortality rate and the narrowing

关键词： Children and adolescents Non-transport unintentional injuries Socio-demographic-index Inequality analysis Foreign body Poisoning Global Burden of Disease Cause of death Developing countries Drowning

灌云县2015-2016年不同出生体重儿童免疫规划疫苗预防接种不良反应发生率

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中国疫苗和免疫 2020年第6期26卷 684-687页

作者：颜晓今贾奔奔灌云县妇幼保健计划生育服务中心江苏连云港222000 灌云县疾病预防控制中心江苏连云港222000

目的比较不同出生体重儿童免疫规划(EPI)疫苗预防接种不良反应报告发生率。方法通过灌云县妇幼保健系统和全国疑似预防接种异常反应监测信息管理系统,收集灌云县2015-2016年新生儿出生体重和9种EPI疫苗不良反应数据,比较不同出生体重儿... 详细信息

目的比较不同出生体重儿童免疫规划(EPI)疫苗预防接种不良反应报告发生率。方法通过灌云县妇幼保健系统和全国疑似预防接种异常反应监测信息管理系统,收集灌云县2015-2016年新生儿出生体重和9种EPI疫苗不良反应数据,比较不同出生体重儿不良反应发生率。结果在灌云县2015-2016年出生低体重儿、正常体重儿、巨大儿中,9种EPI疫苗总不良反应发生率(/万剂)分别为2.31(2例)、5.48(179例)、7.04(36例)(x2=3.62,P=0.17),一般反应分别为2.31、5.27、6.45(x2=2.69,P=0.26),异常反应分别为0.00、0.21、0.59(Fisher确切概率法,P=0.32),卡介苗(BCG)不良反应分别为0.00、0.00、7.05(Fisher确切概率法,P=0.02);其他EPI疫苗不良反应发生率在三组儿童之间均无显著性差异。结论低出生体重儿接种EPI疫苗未增加不良反应发生风险,巨大儿BCG不良反应发生风险可能高于正常体重儿。

关键词：预防接种不良反应免疫规划疫苗出生体重

1990-2019年中国儿童青少年智力残疾疾病负担变化趋势研究

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中华流行病学杂志 2022年第8期43卷 1262-1268页

作者：闫晓晋林是琦李佳佳裴丽君北京大学人口研究所/北京大学中国人口健康与发展研究中心北京100871

目的分析中国0~19岁儿童青少年智力残疾现状及其1990-2019年疾病负担的长期变化趋势。方法数据来源于全球疾病负担研究。分性别、年龄及残疾严重程度比较2019年全球与中国儿童青少年智力残疾患病率及伤残损失健康生命年(YLDs)分布特征... 详细信息

目的分析中国0~19岁儿童青少年智力残疾现状及其1990-2019年疾病负担的长期变化趋势。方法数据来源于全球疾病负担研究。分性别、年龄及残疾严重程度比较2019年全球与中国儿童青少年智力残疾患病率及伤残损失健康生命年(YLDs)分布特征。使用Joinpoint回归模型分析1990-2019年中国儿童青少年智力残疾患病率及YLDs的长期变化趋势。结果2019年中国儿童青少年智力残疾患病率和YLDs分别为1522.65/10万(95%UI:1228.62/10万~1817.55/10万)和109.81人年/10万(95%UI:72.15人年/10万~158.09人年/10万),明显低于全球平均水平,而重度智力残疾患病率和YLDs略高于全球平均水平。1990-2019年中国儿童青少年智力残疾患病率和YLDs的平均年度变化百分比分别为-0.23%(95%CI:-0.26%~-0.21%,P<0.001)和0.74%(95%CI:0.66%~0.81%,P<0.001)。重度智力残疾患病率及YLDs在这30年间呈现持续上升趋势。结论2019年中国儿童青少年智力残疾疾病负担低于全球平均水平,重度智力残疾疾病负担高于全球平均水平。1990-2019年中国儿童青少年智力残疾患病率整体呈现下降趋势,YLDs呈现上升趋势。

关键词：智力残疾患病率伤残损失健康生命年变化趋势