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FRP网格-ECC复合层加固混凝土界面定量化处理及黏结性能试验研究

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建筑结构学报 2024年第5期45卷 207-217页

作者：潘毅任宇郭瑞高子祁夏毛瑶西南交通大学土木工程学院四川成都610031 西南交通大学抗震工程技术四川省重点实验室四川成都610031

针对传统纤维增强复合材料(fiber reinforced polymer, FRP)网格-工程水泥基复合材料(engineered cementitious composites, ECC)复合层加固钢筋混凝土(reinforced concrete, RC)结构存在界面处理质量无法保证的问题,提出通过对混凝土... 详细信息

针对传统纤维增强复合材料(fiber reinforced polymer, FRP)网格-工程水泥基复合材料(engineered cementitious composites, ECC)复合层加固钢筋混凝土(reinforced concrete, RC)结构存在界面处理质量无法保证的问题,提出通过对混凝土表面钻孔定量化描述界面粗糙度的改良FRP网格-ECC复合层加固方法,并建立了粗糙度评价指标,即界面处理率。为研究不同界面处理率下复合层与混凝土之间的界面黏结性能,开展复合层抗拉试验研究其材料性能,并对4组12个双剪试件进行试验,考察不同界面处理率对复合层与混凝土黏结剪切性能的影响。研究结果表明:复合层的拉伸应力-应变曲线呈双线性,抗拉强度为10.62 MPa,极限拉应变为0.0138;未界面处理的试件发生了界面剥离破坏,经界面处理后试件随着界面处理率的增大,破坏模式逐渐从临界断裂破坏向复合层断裂破坏过渡,即定量化界面处理的改良加固法可抑制界面的剥离,且可在一定程度上控制界面破坏形态;基于现有FRP片材-混凝土的黏结滑移模型,并考虑FRP网格-ECC复合层整体受力行为和界面处理率,建立FRP网格-ECC复合层与混凝土界面的黏结滑移模型和承载力计算式,承载力计算值与试验值之比平均值为1.107,二者吻合良好。

关键词： FRP网格-ECC复合层混凝土界面处理双剪试验黏结滑移模型承载力

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我国化妆品产品稳定性研究与管理现状的探讨

日用化学工业（中英文） 2024年第2期54卷 201-208页

作者：潘小红高梓琪陈真殷帅黄海萍胡斌湖南省药品检验检测研究院湖南长沙410001 湖南省药品审核查验中心湖南长沙410001

化妆品的稳定性是评价化妆品质量与安全的重要因素,也是化妆品使用性与功效性的保障。本文对比了全球化妆品稳定性研究的监管体系和稳定性文件情况,梳理了国内化妆品产品有效期、稳定性及监管等相关文件的内容。通过对“监管、协会和企... 详细信息

化妆品的稳定性是评价化妆品质量与安全的重要因素,也是化妆品使用性与功效性的保障。本文对比了全球化妆品稳定性研究的监管体系和稳定性文件情况,梳理了国内化妆品产品有效期、稳定性及监管等相关文件的内容。通过对“监管、协会和企业”三个板块电子问卷调查结果,分析我国目前化妆品产品稳定性研究现状,发现工作开展面临的主要问题。借鉴国外化妆品产品稳定性研究的经验及我国食品药品等行业领域产品稳定性研究情况,对我国化妆品产品稳定性研究方向、技术文件的制定和监管服务提出建议。

关键词：化妆品产品稳定性管理现状建议

Hydrodynamic Behavior of a Single Bubble Rising in Viscous Liquids

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Chinese Journal of Chemical Engineering 2010年第6期18卷 923-930页

作者： CAI ziqi BAO Yuyun gao Zhengming State Key Laboratory of Chemical Resource Engineering School of Chemical Engineering Beijing University ofChemical Technology Beijing 100029 China

The rising behavior of single bubbles has been investigated in six systems with different viscosity and Morton number(Mo) from 3.21×10-11 to 163. Bubbles with maximum equivalent diameter of up to 16 mm were investigated. The bubble Reynolds number(Re) ranged from 0.02 to 1200 covering 3 regimes in which two func-tions are obtained relating the drag coefficient,CD,with Re and Mo. It has been found that in the high Reynolds number regime the drag coefficient increases until the Reynolds number of about 1200. The classic expression of Jamialahmadi(1994) is improved and extended to high viscosity liquids. A new relationship for the aspect ratio of deformed bubbles in terms of Re,the Etvs number and Mo,applicable to a wide range of system properties,espe-cially in high viscosity liquids,is also suggested.

关键词：力学行为单气泡粘性液体上升高粘度液体流体函数系统阻力系数

Simultaneous multimaterial multimethod bioprinting

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Bio-Design and Manufacturing 2022年第3期5卷 433-436页

作者： Hongzhao Zhou Peng Liu ziqi gao Qi Li Weikang Lv Jun Yin Bin Zhang Huayong Yang Liang Ma State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou 310058China School of Mechanical Engineering Zhejiang UniversityHangzhou 310058China

Bioprinting:a powerful tool to fabricate biomimetic tissues and organs Bioprinting is an important technology in the field of biofabrication that aims to create functional biomimetic *** flexibility,versatility and functionality of bioprinting enable the fabrication of intricate biological structures by combining cells,biomaterials or growth factors as printing bioinks[1,2].

关键词： printing organs enable

基于CiteSpace国内外糖尿病前期护理研究热点的可视化分析

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循证护理 2024年第14期10卷 2544-2554页

作者：高子淇高玲玲郭晓迪刘书红陈燕铭刘宗淑胡细玲甘肃省人民医院甘肃730000 中山大学护理学院中山大学附属第三医院广东省糖尿病防治重点实验室中山大学附属第三医院肇庆医院

目的:对中国知网(CNKI)和Web of Science核心合集已发表的国内外糖尿病前期护理相关文献进行可视化分析,了解当前糖尿病前期在护理领域的研究现状、研究热点和发展趋势。方法:采用文献计量学研究方法,检索数据库中自建库至2023年5月1日... 详细信息

目的:对中国知网(CNKI)和Web of Science核心合集已发表的国内外糖尿病前期护理相关文献进行可视化分析,了解当前糖尿病前期在护理领域的研究现状、研究热点和发展趋势。方法:采用文献计量学研究方法,检索数据库中自建库至2023年5月1日以“糖尿病前期”和“护理”为关键词的文献,运用CiteSpace 6.2可视化软件进行分析。结果:国内外发文量呈增长趋势,但总体发文量较少。美国在该领域发文量最多;作者和机构间合作不够紧密。关键词主要以糖尿病前期相关疾病、糖尿病前期健康管理和糖尿病前期干预预防为主。糖尿病前期和健康管理是国内近年来的研究热点,生活方式干预和血糖控制是国外近年来的研究热点。结论:糖尿病前期护理研究领域仍处于上升发展阶段,学者应展开深入研究,探索和构建适应我国国情的糖尿病前期病人的综合健康管理模式。

关键词：糖尿病前期护理 CiteSpace 可视化分析

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Mechanisms of isomerization and hydration reactions of typicalβ-diketone at the air-droplet interface

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Journal of Environmental Sciences 2024年第7期141卷 225-234页

作者： Yuemeng Ji Weiyong Luo Qiuju Shi Xiaohui Ma ziqi Wu Weina Zhang Yanpeng gao Taicheng An Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and Health Guangdong Key Laboratory of Environmental Catalysis and Health Risk ControlInstitute Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of EducationSchool of Environmental Science and EngineeringGuangdong University of TechnologyGuangzhou 510006China

Acetylacetone(AcAc)is a typical class ofβ-diketones with broad industrial applications due to the property of the keto-enol isomers,but its isomerization and chemical reactions at the air-droplet interface are still ***,using combined molecular dynamics and quantum chemistry methods,the heterogeneous chemistry of AcAc at the air-droplet interface was investigated,including the attraction of AcAc isomers by the droplets,the distribution of isomers at the air-droplet interface,and the hydration reactions of isomers at the air-droplet *** results reveal that the preferential orientation of two AcAc isomers(keto-and enol-AcAc)to accumulate and accommodate at the acidic air-droplet *** isomerization of two AcAc isomers at the acidic air-droplet interface is more favorable than that at the neutral air-droplet interface because the“water bridge”structure is destroyed by H_(3)O^(+),especially for the isomerization from keto-Ac Ac to *** the acidic air-droplet interface,the carbonyl or hydroxyl O-atoms of two AcAc isomers display an energetical preference to ***-diol is the dominant products to accumulate at the air-droplet interface,and excessive keto-diol can enter the droplet interior to engage in the *** photooxidation reaction of AcAc will increase the acidity of the air-droplet interface,which indirectly facilitate the uptake and formation of more *** results provide an insight into the heterogeneous chemistry ofβ-diketones and their influence on the environment.

关键词： Acetylacetone Air-droplet interface Theoretical simulation Isomerization Hydration reaction mechanism

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湖南省中医护理门诊开展现状的调查研究

中医药导报 2024年第2期30卷 193-197页

作者：高子琪廖若夷佀惠婕彭露刘彬杨楠郭元湖南中医药大学护理学院湖南长沙410208 湖南中医药大学第一附属医院湖南长沙410007

目的:了解湖南省中医护理门诊开设现状,为制订中医护理门诊的建设及管理规范提供依据。方法:2022年10—12月,采用自行设计的《湖南省中医护理门诊开展现状调查问卷》对湖南省公立中医医院的门诊环境、运作模式、人员资质、管理模式等方... 详细信息

目的:了解湖南省中医护理门诊开设现状,为制订中医护理门诊的建设及管理规范提供依据。方法:2022年10—12月,采用自行设计的《湖南省中医护理门诊开展现状调查问卷》对湖南省公立中医医院的门诊环境、运作模式、人员资质、管理模式等方面进行调查。结果:97所公立中医医院参与问卷填写,回收问卷104份。调查结果显示,44.33%(43/97)的医院开设独立的中医护理门诊,均为近5年内开办;37.21%(16/43)的中医护理门诊开展的中医适宜技术>10项;出诊模式以医护合作为主,病症覆盖范围包括慢病管理、治未病等;18.60%(8/43)的中医护理门诊开展“互联网+”护理服务;三级中医医院中医护理门诊开展情况优于二级中医医院。结论:湖南省中医护理门诊发展迅速,开设的中医护理门诊在满足患者健康需求等方面取得显著成效,未来应进一步促进相关管理规范的完善、重视中医护理人才梯队培养、加强基层科研发展和规范中医护理收费标准。

关键词：中医护理门诊湖南问卷调查现状研究

In situ Preparation and Visible-light-driven Photocatalytic Degradation Performance of Nano 3C-SiC@Multilayer Graphene Oxide Heterostructure

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Chemical Research in Chinese Universities 2024年第3期40卷 536-547页

作者： YANG Xiaodan GUO ziqi XU Yichen LI Ziliang ZHOU Yangtao YANG Zhenming ZHOU Zishuai gao Yong ZHANG Jinsong Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016P.R.China Nano Science and Technology Institute University of Science and Technology of ChinaSuzhou 215123P.R.China Shenyang SCIENCREAT Chemicals Co. Ltd.Shenyang 110144P.R.China School of Materials Science and Engineering Northeastern UniversityShenyang 110819P.R.China

Nano 3C-SiC@multilayer graphene oxide(NS@MGO)heterostructure was in situ prepared by carbothermal reduction of pyrolyzed precursor composed of highly dispersed cured phenolic resin and silicon dioxide derived from tetraethyl *** heterojunction interface,number of layers of MGO,and defect content in graphene are the three most important factors for promoting photocatalytic *** contact between 3C-SiC nanograins and MGO layers facilitates the photogenerated electrons to migrate across the heterojunction interface and avoid the formation of SiO_(2) nanolayers on the surface of SiC *** number of MGO layers is supposed to be less than ten instead of over-thick *** concentrations of oxygenated components,considered the defect contents,decrease with the increase of sintering temperature for NS@MGO 0.175-T-150,and relative carbon content in the multilayer graphene *** to the heterostructures,properties,and photocatalytic reaction performance of the NS@MGO materials,the highest photocatalytic kinetic rate constant of 0.00891/min for NS@MGO 0.175-1500-150 shows that the significant enhancement in photocatalytic degradation activity under visible light(>420 nm)irradiation is ascribed to the advantageous synergistic effects between the nano 3C-SiC particles and the direct contact multilayer graphene oxide with appropriate layers and sufficient oxygen content of 3.51%(atomic fraction)in MGO.

关键词： Photocatalysis Multilayer graphene oxide Nano 3C-SiC Visiblelight degradation

Simultaneous multi-material embedded printing for 3D heterogeneous structures

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International Journal of Extreme Manufacturing 2023年第3期5卷 485-498页

作者： ziqi gao Jun Yin Peng Liu Qi Li Runan Zhang Huayong Yang Hongzhao Zhou State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou 310058People’s Republic of China School of Mechanical Engineering Zhejiang UniversityHangzhou 310058People’s Republic of China Department of Mechanical Engineering Centre for Power Transmission and Motion ControlUniversity of BathBath BA27AYUnited Kingdom

In order to mimic the natural heterogeneity of native tissue and provide a better microenvironment for cell culturing,multi-material bioprinting has become a common solution to construct tissue models in *** the embedded printing method,complex 3D structure can be printed using soft biomaterials with reasonable shape ***,the current sequential multi-material embedded printing method faces a major challenge,which is the inevitable trade-off between the printed structural integrity and printing ***,we propose a simultaneous multi-material embedded printing *** this method,we can easily print firmly attached and high-precision multilayer *** multiple individually controlled nozzles,different biomaterials can be precisely deposited into a single crevasse,minimizing uncontrolled squeezing and guarantees no contamination of embedding medium within the *** analyse the dynamics of the extruded bioink in the embedding medium both analytically and experimentally,and quantitatively evaluate the effects of printing parameters including printing speed and rheology of embedding medium,on the 3D morphology of the printed *** demonstrate the printing of double-layer thin-walled structures,each layer less than 200μm,as well as intestine and liver models with 5%gelatin methacryloyl that are crosslinked and extracted from the embedding medium without significant impairment or *** peeling test further proves that the proposed method offers better structural integrity than conventional sequential printing *** proposed simultaneous multi-material embedded printing method can serve as a powerful tool to support the complex heterogeneous structure fabrication and open unique prospects for personalized medicine.

关键词： embedded printing multi-material printing printability soft materials heterogeneous structures