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数据驱动的混凝土材料-结构一体化设计研究进展

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建筑结构学报 2024年第8期45卷 20-33页

作者：胡张莉刘加平赵羽习赵海涛戚家南王育江韩方玉金鸣东南大学材料科学与工程学院江苏南京211102 浙江大学建筑工程学院浙江杭州310058 河海大学土木与交通学院江苏南京210024 东南大学土木工程学院江苏南京211102 江苏省建筑科学研究院有限公司江苏南京210024

材料-结构一体化设计是指在结构设计中综合考虑材料的性能,而在材料设计中则以结构的需求为出发点,形成材料到结构跨多尺度的设计模式,近年来已成为现代混凝土工程领域的研究重点。基于数据及人工智能算法的混凝土材料、结构设计方法可... 详细信息

材料-结构一体化设计是指在结构设计中综合考虑材料的性能,而在材料设计中则以结构的需求为出发点,形成材料到结构跨多尺度的设计模式,近年来已成为现代混凝土工程领域的研究重点。基于数据及人工智能算法的混凝土材料、结构设计方法可颠覆传统设计依赖经验且需重复试配的范式,实现高效节材及结构创新。梳理了国内外混凝土材料智能设计及材料-结构一体化设计的研究现状,总结了材料层面数据驱动的正向预测及逆向设计的研究范畴和关键问题,梳理了考虑温-湿-约束复杂交互的材料-结构一体化抗裂设计途径与效果,以氯盐侵蚀环境为例分析了混凝土材料-结构耐久性设计方案及提升手段,并以超高性能混凝土为例阐述了混凝土材料-结构高性能设计的方法,提出未来数据驱动的混凝土材料-结构一体化设计框架及生产、设计、制备及结构应用全综合的研究思路,并建议未来应在数据库建设、数据与理论融合及多尺度关联的协同算法等方面开展研究。

关键词：材料-结构一体化设计数据驱动抗裂耐久性高性能

Cyanidin-3-glucoside protects the photooxidative damage of retinal pigment epithelium cells by regulating sphingolipid signaling and inhibiting MAPK pathway

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Food Science and Human Wellness 2024年第2期13卷 621-632页

作者： Tingting Liu Wentao qi Wenting Peng jianan Zhang Yong Wang School of Health Science and Engineering University of Shanghai for Science and TechnologyShanghai 200093China Academy of National Food and Strategic Reserves Administration Beijing 100037China Department of Chemistry University of North Carolina at Chapel HillChapel HillNC 27599USA

Cyanidin-3-glucoside(C3G)is the most common anthocyanin in dark grains and berries and is a food functional factor to improve visual ***,the mechanisms of C3G on blue light-induced retinal pigment epithelial(RPE)cell photooxidative damage needs further *** investigated the effects of C3G on blue light-irradiated A2E-containing RPE cells and explored whether sphingolipid,mitogen-activated protein kinase(MAPK),and mitochondria-mediated pathways are involved in this *** light irradiation led to mitochondria and lysosome damage in RPE cells,whereas C3G preserved mitochondrial morphology and function and maintained the lysosomal integrity.C3G suppressed the phosphorylation of JNK and p38 MAPK and mitochondria-mediated pathways to inhibit RPE cell *** data showed that C3G protected RPE cells against blue light-induced lipid peroxidation and apoptosis by maintaining sphingolipids balance.C3G significantly inhibited ceramide(Cer d18:0/15:0,Cer d18:0/16:0 and Cer d18:0/18:0)accumulation and elevated galactosylceramide(GalCer d18:1/15:0 and GalCer d18:1/16:0)levels in the irradiated A2E-containing RPE ***,C3G attenuated cell membrane damage by increasing phosphatidylcholine and phosphatidylserine levels.C3G inhibited apoptosis and preserved the structure of mitochondria and lysosome by regulating sphingolipid signaling and suppression of MAPK activation in RPE ***,dietary supplementation of C3G prevents retinal photooxidative damage.

关键词： Cyanidin-3-glucoside Ceramide MAPK pathway Mitochondria-dependent apoptosis Lipidomics analysis

Ten years of the China migrants dynamic survey: retrospective and prospects

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China Population and Development Studies 2021年第5期5卷 296-305页

作者： Zhili Wang qian Wang jianan qi China Population and Development Research Center BeijingChina National Health Commission of People’s Republic of China BeijingChina

This paper reviews the background of China’s decision to launch the“China Migrants Dynamic Survey”(CMDS),and examines the ideas and characteristics of CMDSs carried out annually from 2009 through *** paper considers such aspects as project design,questionnaire design,sampling design,and survey imple-mentation,and summarizes why it is necessary to carry out CMDS and the survey’s *** on the need for information that drives migration surveys and research in the new era,and taking into account the experience gained from previous surveys,this paper attempts to set forth several issues that need to be taken into con-sideration in the design and implementation of future surveys of migrants.

关键词： Migration Survey China Migrants Dynamic Survey(CMDS)

Junshanyinzhen tea extract prevents obesity by regulating gut microbiota and metabolic endotoxemia in high-fat diet fed rats

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Food Science and Human Wellness 2024年第4期13卷 2036-2047页

作者： Jian Ouyang Xiuping Li Changwei Liu Danmin Lu Jie Ouyang Fang Zhou qi Liu jianan Huang Zhonghua Liu Key Laboratory of Tea Science of Ministry of Education Hunan Agricultural UniversityChangsha 410128China National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals Hunan Agricultural UniversityChangsha 410128China Co-Innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients Hunan Agricultural UniversityChangsha 410128China Key Laboratory for Evaluation and Utilization of Gene Resources of Horticultural Crops Ministry of Agriculture and Rural AffairsHunan Agricultural UniversityChangsha 410128China

Obesity is associated with gut dysbiosis and metabolic *** tea extract(JSTE)reduced fat accumulation and body weight in obese ***,the effects and mechanism of JSTE in preventing obesity were ***,we used different doses of JSTE(75,150 and 300 mg/(kg·day))to evaluate the effect on high-fat diet(HFD)-induced rats under 8 weeks of ***,our results showed that JSTE could significantly reduce body weight gain,blood lipid levels and fat accumulation,improve fatty damage in liver tissue(P<0.05).In addition,JSTE increased the expression of intestinal tight junction proteins(P<0.05),relieved metabolic endotoxemia(P<0.05)and chronic low-grade inflammation in HFD *** of fecal samples showed that JSTE could effectively reverse the microbial diversity and the ratio of Firmicutes to Bacteroidetes to normal levels in HFD-fed *** and Erysipelotrichaceae,which are positively related to obesity,were decreased by JSTE intervention(P<0.05).while Bifidobacteriaceae,Bacteroidaceae,Akkermansia,and Clostridium,which are negatively related to obesity,were ***,these results suggested that JSTE might effectively prevent obesity by modulating gut microbiota dysbiosis,intestinal barrier dysfunction,metabolic endotoxemia and chronic low-grade infl ammation in HFD-induced rats.

关键词： Junshanyinzhen tea Obesity Gut microbiota Gut barrier function Metabolic endotoxemia

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考虑翼缘影响的钢筋混凝土T梁抗剪承载力

东南大学学报（自然科学版） 2019年第4期49卷 638-644页

作者：戚家南王景全东南大学混凝土及预应力混凝土结构教育部重点实验室南京210096 东南大学国家预应力工程技术研究中心南京210096

针对现行规范忽略翼缘的抗剪提高作用和过于低估混凝土T梁抗剪承载力的问题,探讨了T形截面混凝土梁剪力传递机理,基于有效抗剪区域思想提出了腹板抗剪有效宽度计算方法,进而建立了考虑翼缘影响的混凝土T梁抗剪承载力理论计算式.该公式... 详细信息

针对现行规范忽略翼缘的抗剪提高作用和过于低估混凝土T梁抗剪承载力的问题,探讨了T形截面混凝土梁剪力传递机理,基于有效抗剪区域思想提出了腹板抗剪有效宽度计算方法,进而建立了考虑翼缘影响的混凝土T梁抗剪承载力理论计算式.该公式形式简单,物理意义明确,可退化为矩形梁抗剪承载力公式,可以较好地反应混凝土强度、剪跨比、纵筋率、翼缘宽度等主要因素对抗剪承载力的影响规律.采用157片混凝土T梁试验数据对理论计算式进行验证,并与国内外规范进行对比.结果表明,该公式可以很好预测混凝土T梁抗剪承载力,抗剪承载力计算值与试验值比值均值为1.012,标准差为0.268.

关键词：钢筋混凝土 T梁抗剪承载力有效腹板宽度破坏准则

Non-sampling errors in questionnaire surveys: findings from a National Fertility Survey

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China Population and Development Studies 2022年第1期6卷 34-54页

作者： jianan qi Xueqing Zhao Yaer Zhuang Bohua Li China Population and Development Center BeijingChina China Population Association BeijingChina

Non-sampling errors can generally be divided into three types:sampling frame errors,non-response errors and measurement *** target units in the sam-pling frame,improper handling of non-responses,and misreporting or underreport-ing of key variables in the questionnaire can all cause deviations in a survey’s *** widespread application of Computer-Assisted Personal Interviewing(CAPI)systems and the inclusion of administrative records from government sources in sur-veys has strengthened the ability to control non-sampling *** a national fertility sampling survey as an example,this study summarizes the sources of var-ious non-sampling errors and explains how to harness big data resources such as administrative records to control non-sampling errors throughout the *** study analyzes the impact of three types of non-sampling errors on the results of the fertility survey and examines the strategies used to address the problems caused by these non-sampling *** findings indicate that non-sampling errors were the main source of total error in the survey,and that the errors found came mainly from sampling frame errors;non-response errors and measurement errors were controlled and had little impact on the survey results.

关键词： Non-sampling error Sampling frame error Administrative records Fertility survey

Report on the Dynamic Monitoring of Health and Family Planning Services for Migrant Populations in 2015

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China Population and Development Studies 2017年第2期1卷 104-114页

作者： ZHUANG Yaer WANG Zhili qi jianan HAN Feng ZHANG Gang China Population and Development Research Center BeijingChina

Large-scale population migration has accompanied China's industrialization and urbanization,becoming a normal characteristic of population development in *** the 1980s,the size of the migrant population in China has increased *** to data issued by National Bureau of Statistics,by the end of 2015,the size of the migrant population in China had reached 247 million.(People who have remained in the same locale as their household registration but at a different address than that listed on their household registrations are not included in this total.)This number accounts for 18%of the total population of China;that is,about one out of six Chinese is *** massive movement of people has made tremendous contributions to China's economic development.

关键词： Population Services Migrant

China fertility survey 2017:design and implementation

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China Population and Development Studies 2019年第1期2卷 259-271页

作者： Yaer Zhuang Shenghui Yang jianan qi Bohua Li Xueqing Zhao Zhili Wang China Population and Development Research Center BeijingChina Renmin University of China BeijingChina

This paper examines the design and the process used to carry out the China Fertility Survey 2017,a national representative survey that collected data on fertility desire,childbearing behavior,the use of childbearing services,and the determinants of childbearing *** sampling method adopted was three-stage stratified probabilities proportional to size(PPS),and survey implementation made use of Computer Assisted Personal Interviewing(CAPI).CAPI played a significant role in survey design,last-stage sampling,interviewer training,face-to-face interviews,and questionnaire review and quality *** survey results were compared with relevant data in the Integrated Management Information System for Population and Family Planning to check *** post facto weighting was applied to correct sample structure *** process used to acquire accurate personal information is *** based on consideration of sampling frame distortion by population mobility and other factors are put forward in the hope of improving similar sampling surveys in the future.

关键词： Fertility survey Quality control Ex post facto weighting

基于细观本构模型的UHPC梁受弯全过程分析

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建筑结构学报 2020年第9期41卷 137-144页

作者：王景全戚家南刘加平东南大学混凝土及预应力混凝土结构教育部重点实验室江苏南京211189 东南大学国家预应力工程技术研究中心江苏南京211189 东南大学材料科学与工程学院江苏南京211189

为预测超高性能混凝土(UHPC)残余抗拉强度,通过细观力学分析,研究了纤维对UHPC残余抗拉强度贡献机理,提出了考虑纤维埋深、分布和取向的UHPC细观本构模型。基于UHPC细观本构、受力平衡方程和变形协调条件,建立了UHPC梁受弯分析模型和受... 详细信息

为预测超高性能混凝土(UHPC)残余抗拉强度,通过细观力学分析,研究了纤维对UHPC残余抗拉强度贡献机理,提出了考虑纤维埋深、分布和取向的UHPC细观本构模型。基于UHPC细观本构、受力平衡方程和变形协调条件,建立了UHPC梁受弯分析模型和受弯承载力理论计算方法。经与8个UHPC梁试件受弯试验结果对比发现,文中提出的模型可以较好地预测UHPC梁受弯全过程响应和受弯承载力。基于基准试验梁的不同作用机制受弯贡献比例分析发现,纵筋配筋率从0增至2.5%时,受拉区混凝土对受弯承载力贡献从89.6%降至2.4%;纤维率从0增至3%时,受拉区混凝土对受弯承载力贡献从0增至22.1%。计算结果表明,对于低配筋UHPC结构,混凝土抗拉贡献应予以考虑。

关键词：超高性能混凝土梁细观本构模型受弯承载力