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Structural performance of a façade precast concrete sandwich panel enabled by a bar-type basalt fiber-reinforced polymer connector

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Frontiers of Structural and Civil Engineering 2023年第1期17卷 122-137页

作者： junqi huang Qing JIANG Xun CHONG Xianguo YE Caihua LIU School of Civil and Hydraulic Engineering Hefei University of TechnologyHefei 230009China Anhui Civil Engineering Structures and Materials Laboratory Hefei 230009China

In this study,a novel diagonally inserted bar-type basalt fiber reinforced polymer(BFRP)connector was proposed,aiming to achieve both construction convenience and partially composite behavior in precast concrete sandwich panels(PCSPs).First,pull-out tests were conducted to evaluate the anchoring performance of the connector in concrete after exposure to different ***,direct shear tests were conducted to investigate the shear performance of the *** the test on the individual performance of the connector,five façade PCSP specimens with the bar-type BFRP connector were fabricated,and the out-of-plane flexural performance was tested under a uniformly distributed *** investigating parameters included the panel length,opening condition,and boundary *** results obtained in this study primarily indicated that 1)the bar-type BFRP connector can achieve a reliable anchorage system in concrete;2)the bar-type BFRP connector can offer sufficient stiffness and capacity to achieve a partially composite PCSP;3)the boundary condition of the panel considerably influenced the out-of-plane flexural performance and composite action of the investigated façade PCSP.

关键词： precast concrete sandwich panel basalt fiber reinforced polymer pull-out performance shear performance out-of-plane flexural performance

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预制地聚物混凝土夹心墙板轴心受压性能研究

工业建筑 2024年第6期54卷 169-176页

作者：赵猛黄俊旗种迅蒋庆冯玉龙合肥工业大学土木与水利工程学院合肥230009 土木工程结构与材料安徽省重点实验室合肥230009

设计并制作了6片采用地聚物混凝土和玻璃纤维增强复合材料(GFRP)六角筒形拉结件的预制混凝土夹心墙板试件,对其进行了轴心受压试验,研究了拉结件间距、墙板高度和钢筋混凝土叶板厚度3个关键参数对墙板轴压下的破坏模式、承载力、变形等... 详细信息

设计并制作了6片采用地聚物混凝土和玻璃纤维增强复合材料(GFRP)六角筒形拉结件的预制混凝土夹心墙板试件,对其进行了轴心受压试验,研究了拉结件间距、墙板高度和钢筋混凝土叶板厚度3个关键参数对墙板轴压下的破坏模式、承载力、变形等的影响。试验结果表明:试件均呈现因二阶效应产生的大偏心受压破坏,表现为一侧叶板混凝土压碎和另一侧叶板混凝土水平开裂;随着拉结件间距的增加,墙板的组合性能降低,破坏时混凝土压碎区域面积减小,侧向变形增大,试件承载力逐渐降低(当拉结件间距由300 mm增加至600、 900 mm以及不设置拉结件时,承载力分别下降了17.1%、42.0%、49.5%。);随着墙板高度的减小或混凝土叶板厚度的增加,构件的长细比和二阶效应逐渐减小,破坏时混凝土压碎区面积增大,平面外变形减小,试件的承载力增加(当叶板厚度由50 mm增至75 mm时或高度从2 100 mm降至1 500 mm时,试件承载力分别提高了34.3%、5.9%)。

关键词：地聚物混凝土预制混凝土夹心墙板 FRP拉结件轴心受压破坏模式

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便携式电力参数监测系统的设计与实现

厦门理工学院学报 2024年第3期32卷 52-57页

作者：江华丽王绍冲黄俊奇石炜仕沈弘艺陈航厦门理工学院光电与通信工程学院福建厦门361024

为了解决复杂环境下无法实时监测电力参数的问题,设计出一种远距离(long range,LoRa)无线电组网的便携式电力参数监测系统。该系统基于STM32-Corbe-M4处理器内核和IM1281B电量计能模块,实现电压、电流、功率、频率等电力参数的采集;采用... 详细信息

为了解决复杂环境下无法实时监测电力参数的问题,设计出一种远距离(long range,LoRa)无线电组网的便携式电力参数监测系统。该系统基于STM32-Corbe-M4处理器内核和IM1281B电量计能模块,实现电压、电流、功率、频率等电力参数的采集;采用LoRa通信方式,实现远距离低功耗的数据传输。针对不同负载进行测试,结果表明,当电路的功率因素提高时,总电流明显减小,电路消耗的功率减少,有功功率增大,电源的利用率得以提高;该系统能够替代三表法测试,能够摆脱传统实验室的束缚,实际采集的功率参数与上位机显示的功率参数基本一致,测试数据的准确性为98%。

关键词：电力参数监测系统远距离(LoRa)无线电 STM32-Corbe-M4处理器 IM1281B电量计算模块功率因素

装载人参皂苷Rh2外泌体的制备及其对肝癌细胞株Huh7、PLC半数抑制浓度测算

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山东医药 2024年第9期64卷 33-36页

作者：李美乐赵梓粤金凯唐婷黄俊期王戈睿谢裕安广西医科大学附属肿瘤医院实验研究部南宁530021 广西医科大学第一附属医院消化内科广西中医药大学研究生院广西壮族自治区妇幼保健院

目的制备装载人参皂苷Rh2(G-Rh2)的外泌体(Exos@G-Rh2),并测算其对肝癌细胞株Huh7、PLC的半数抑制浓度(IC50)。方法利用外泌体提取试剂盒从肝癌Huh7细胞培养上清中分离提纯外泌体(Exos),采用电穿孔法制备装载G-Rh2的外泌体Exos@G-Rh2,... 详细信息

目的制备装载人参皂苷Rh2(G-Rh2)的外泌体(Exos@G-Rh2),并测算其对肝癌细胞株Huh7、PLC的半数抑制浓度(IC50)。方法利用外泌体提取试剂盒从肝癌Huh7细胞培养上清中分离提纯外泌体(Exos),采用电穿孔法制备装载G-Rh2的外泌体Exos@G-Rh2,使用透射电子显微镜观察Exos@G-Rh2、Exos形态,使用纳米颗粒跟踪分析仪测算Exos@G-Rh2、Exos粒径,采用高效液相色谱(HPLC)法测算Exos@G-Rh2中G-Rh2含量,并计算Exos@G-Rh2载药量。采用PKH-26荧光染色法观察肝癌细胞株Huh7、PLC对Exos@G-Rh2的摄取情况,采用CCK-8法测算Exos@G-Rh2、游离G-Rh2对Huh7细胞、PLC细胞的IC50。结果Exos及Exos@G-Rh2在电镜下均可见经典的茶托状结构,且有质膜包裹,形态无显著差异。Exos@G-Rh2、Exos粒径分别为(156.90±10.23)nm、(143.47±8.62)nm,两者相比,P>0.05。Exos@G-Rh2载药量为24.25%±0.27%。在Huh7细胞、PLC细胞中,红色荧光清晰可见,主要在细胞质中。在Huh7细胞中,游离G-Rh2的IC50值为(34.96±1.37)µg/mL,而Exos@G-Rh2的IC50值为(29.74±2.83)µg/mL,两者相比,P<0.05;在PLC细胞中,游离G-Rh2的IC50值为(33.41±1.47)µg/mL,而Exos@G-Rh2的IC50值为(30.08±1.12)µg/mL,两者相比,P<0.05。结论成功制备Exos@G-Rh2,其形态和粒径与Exos无显著差异,可被Huh7细胞、PLC细胞摄取。与游离G-Rh2相比,Exos@G-Rh2对Huh7细胞、PLC细胞的IC50更低。

关键词：人参人参皂苷Rh2 外泌体肝细胞癌药物载体

Landslide hazard susceptibility evaluation based on SBAS-InSAR technology and SSA-BP neural network algorithm:A case study of Baihetan Reservoir Area

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Journal of Mountain Science 2024年第3期21卷 952-972页

作者： GUO junqi XI Wenfei YANG Zhiquan SHI Zhengtao huang Guangcai YANG Zhengrong YANG Dongqing Faculty of Geography Yunnan Normal UniversityKunming 650500China Key Laboratory of Early Rapid Identification Prevention and Control of Geological Diseases in Traffic Corridor of High Intensity Earthquake Mountainous Area of Yunnan ProvinceKunming 650093China Faculty of Public Safety and Emergency Management Kunming University of Science and TechnologyKunming 650093China Key Laboratory of Geological Disaster Risk Prevention and Control and Emergency Disaster Reduction of Ministry of Emergency Management of the People’s Republic of China Kunming University of Science and TechnologyKunming 650093China Guizhou Geological Survey Institute Guiyang 550081China College of Big Data and Intelligent Engineering Southwest Forestry UniversityKunming 650224China

Landslide hazard susceptibility evaluation takes on critical significance in early warning and disaster prevention and *** order to solve the problems of poor effectiveness of landslide data and complex calculation of weights for multiple evaluation factors in the existing landslide susceptibility evaluation models,in this study,a method of landslide hazard susceptibility evaluation is proposed by combining SBAS-InSAR(Small Baseline Subsets-Interferometric Synthetic Aperture Radar)and SSA-BP(Sparrow Search Algorithm-Back Propagation)neural network *** SBAS-InSAR technology is adopted to identify potential landslide hazards in the study area,update the cataloging data of landslide hazards,and 11 evaluation factors are chosen for constructing the SSA-BP model for training and *** Reservoir area is selected as a case study for *** indicated by the results,the application of SBAS-InSAR technology,combined with both ascending and descending orbit data,effectively addresses the incomplete identification of landslide hazards caused by geometric distortion of single orbit SAR data(e.g.,shadow,overlay,and perspective contraction)in deep canyon areas,thereby enabling the acquisition of up-to-date landslide hazard ***,in comparison to the conventional BP(Back Propagation)algorithm,the accuracy of the model constructed by the SSA-BP algorithm exhibits a significant increase,with mean squared error and mean absolute error reduced by 0.0142 and 0.0607,***,during the process of susceptibility evaluation,the SSA-BP model effectively circumvents the issue of considerable manual interventions in calculating the weight of evaluation *** area under the curve of this model reaches 0.909,surpassing BP(0.835),random forest(0.792),and the information value method(0.699).The risk of landslide occurrence in the Baihetan Reservoir area is positively correlated with slope,surface temperature,and deformation ra

关键词： Baihetan SBAS-InSAR SSA-BP Landslide hazard susceptibility evaluation

Analysis and Numerical Solution of Transient Electromagnetic Scattering from Overfilled Cavities

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Communications in Computational Physics 2006年第6期1卷 1043-1055页

作者： junqi huang Aihua Wood Air Force Institute of Technology 2950 Hobson WayAFIT/ENCWPAFBOH45433-7765USA

A hybrid finite element(FEM)and Fourier transform method is imple-mented to analyze the time domain scattering of a plane wave incident on a 2-D over-filled cavity embedded in the infinite ground *** algorithm first removes the time variable by Fourier transform,through which a frequency domain problem is *** artificial boundary condition is then introduced on a hemisphere enclosing the cavity that couples the fields from the infinite exterior domain to those *** exterior problem is solved analytically via Fourier series solutions,while the interior region is solved using finite element *** the end,the image functions in fre-quency domain are numerically inverted into the time *** perfect link over the artificial boundary between the FEM approximation in the interior and analytical solution in the exterior indicates the reliability of the method.A convergence analysis is also performed.

关键词： Time domain overfilled cavity scattering Fourier transform finite element method

A Hybrid Finite Element-Laplace Transform Method for the Analysis of Transient Electromagnetic Scattering by an Over-Filled Cavity in the Ground Plane

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Communications in Computational Physics 2009年第1期5卷 126-141页

作者： junqi huang Aihua W.Wood Michael J.Havrilla Air Force Institute of Technology 2950 Hobson WayWright-Patterson AFBOH 45433USA

A hybrid finite element-Laplace transform method is implemented to analyze the time domain electromagnetic scattering induced by a 2-D overfilled cavity embedded in the infinite ground *** algorithm divides the whole scattering domain into two,interior and exterior,*** the interior sub-domain which covers the cavity,the problem is solved via the finite element *** problem is solved analytically in the exterior sub-domain which slightly overlaps the interior subdomain and extends to the rest of the upper half *** use of the Laplace transform leads to an analytical link condition between the overlapping *** analytical link guides the selection of the overlapping zone and eliminates the need to use the conventional Schwartz *** dramatically improves the efficiency for solving transient scattering *** solutions are tested favorably against analytical ones for a canonical *** perfect link over the artificial boundary between the finite element approximation in the interior and analytical solution in the exterior further indicates the reliability of the *** error analysis is also performed.

关键词： Overfilled cavity time domain electromagnetic scattering Laplace transform finite element method

ANALYTICAL AND APPROXIMATE SOLUTION FOR SPHERICAL SYMMETRY DISPERSIVE TRANSPORT IN POROUS MEDIA

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Journal of Hydrodynamics 1997年第4期9卷 1-8页

作者： huang, junqi Liu, Ciqun Beijing Normal Univ Beijing China

Spherical symmetry convective-dispersive transport of a tracer contamination from continue and slug injection well in semi-infinite porous media has been studied. The analytical solution has been obtained by analytical inversion. The early time approximate solution was given. These solutions were compared and the characteristics of concentration distribution and change were investigated. The results show that in early time and late time the approximate solution is of significance.

关键词： Approximation theory Dispersions Mathematical models Petroleum engineering Porous materials Transport properties

A thermodynamic perspective on electrode poisoning in solid oxide fuel cells

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International Journal of Minerals,Metallurgy and Materials 2024年第6期31卷 1449-1455页

作者： Kevin huang Department of Mechanical Engineering University of South CarolinaColumbiaUSA

A critical challenge to the commercialization of clean and high-efficiency solid oxide fuel cell(SOFC)technology is the insuf-ficient stack lifespan caused by a variety of degradation mechanisms,which are associated with cell components and chemical *** components related degradation refers to thermal/chemical/electrochemical deterioration of cell materials under operating conditions,whereas the latter regards impurities in feedstocks of oxidant(air)and reductant(fuel).This article provides a thermodynamic perspective on the understanding of the impurities-induced degradation mechanisms in *** discussion focuses on using thermodynamic ana-lysis to elucidate poisoning mechanisms in cathodes by impurity species such as Cr,CO_(2),H_(2)O,and SO_(2) and in the anode by species such as S(or H_(2)S),SiO_(2),and P_(2)(or PH_(3)).The author hopes the presented fundamental insights can provide a theoretical foundation for search-ing for better technical solutions to address the critical degradation challenges.

关键词： impurities air fuel reaction activity