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Nano Research 2024年第3期17卷 1607-1615页

作者： Jia Zhao Zhe Gu qingguo Zhang college of chemistry and Materials Engineering Bohai UniversityJinzhou 121013China

The key to solve increasingly severe electromagnetic(EM)pollution is to explore sustainable,easily prepared,and cost-effec.ive EM wave absorption materials with exceptional absorption ***,instead of anchoring on carbon materials in single layer,MoS_(2) flower-like microspheres were stacked on the surface of pomelo peels-derived porous carbon nanosheets(c)to fabricate MoS_(2)@c nanocomposites by a facile solvothermal *** wave absorption performances of MoS_(2)@c nanocomposites in X-band were systematically investigated,indicating the minimum reflec.ion loss(RLmin)of-62.3 dB(thickness of 2.88 mm)and effec.ive absorption bandwidth(EAB)almost covering the whole X-band(thickness of 2.63 mm)with the filler loading of only 20 wt.%.Superior EM wave absorption performances of MoS_(2)@c nanocomposites could be attributed to the excellent impedance matc.ing characteristic and dielectric loss capacity(conduc.ion loss and polarization loss).This study revealed that the as-prepared MoS_(2)@c nanocomposites would be a novel prospec.ive candidate for the sustainable EM absorbents with superior EM wave absorption performances.

关键词： pomelo peels-derived porous carbon nanosheets(c) MoS_(2)@c nanocomposites stacked structure electromagnetic(EM)wave absorption

Flexible mica films coated by magnetron sputtered insulating layers for high-temperature capacitive energy storage

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SusMat 2024年第5期4卷 154-162页

作者： chao Yin Tiandong Zhang changhai Zhang Yue Zhang chang Kyu Jeong Geon-Tae Hwang qingguo c.i Key Laboratory of Engineering Dielectrics and its Application Ministry of EducationHarbin University of Science and TechnologyHarbinChina School of Electrical and Electronic Engineering Harbin University of Science and TechnologyHarbinChina Division of Advanced Materials Engineering Jeonbuk National UniversityJeonjuSouth Korea Department of Materials Science and Engineering Pukyong National UniversityBusanSouth Korea

High-temperature energy storage performance of dielectric capacitors is cru-cial for the next generation of power electronic ***,conduc.ion losses rise sharply at elevated temperature,limiting the application of energy storage ***,the mica films magnetron sputtered by different insulating layers are specifically investigated,which exhibit the excellent high-temperature energy storage *** experimental results revealed that the PbZrO3/Al2O3/PbZrO3(PZO/AO/PZO)interface insulating layers can effec-tively reduce the high-temperature leakage current and conduc.ion loss of the composite ***,the ultrahigh energy storage density(Wrec)and charge‒discharge efficiency(η)can be ac.ieved simultaneously in the flexi-ble mica-based composite ***,PZO/AO/PZO/mica/PZO/AO/PZO(PAPMPAP)films possess excellent Wrec of 27.5 J/cm3 andηof 87.8%at 200◦c,which are significantly better than currently reported high-temperature capaci-tive energy storage dielectric *** with outstanding power density and electrical cyc.ing stability,the flexible films in this work have great appli-cation potential in high-temperature energy storage ***,the magnetron sputtering technology can deposit large-area nanoscale insulating layers on the surface of capacitor films,which can provide technical support for the industrial produc.ion of capacitors.

关键词： energy storage high temperature insulating layer magnetron sputtering mica

Study on Adsorption Removal of Polycyc.ic Aromatic Hydrocarbons by Modified Mussel Shells

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Meteorological and Environmental Research 2024年第1期15卷 83-86页

作者： Jiaxing LiU Muchen LANG Mei LiU Kecun MA qingguo cHEN Zhejiang Provincial Key Laboratory of Petrochemical Pollution control Zhejiang Ocean UniversityZhoushan 316022China School of Petrochemical Engineering&Environment Zhejiang Ocean UniversityZhoushan 316022China School of Marine Science&Technology Zhejiang Ocean UniversityZhoushan 316022China ZPc(Zhejiang Pilot Free Trade Zone)Green Petrochemical Research institute co. Ltd.Zhoushan 316000China Zhejiang Petroleum&chemical co. Ltd.(ZPC)Zhoushan 316000China

Polycyc.ic aromatic hydrocarbons(PAHs)are typical persistent organic pollutants(POPs)that are commonly found in the *** are carcinogenic,teratogenic,mutagenic and biodegradable *** this paper,the modified mussel shells were used to adsorb and remove *** results show that the adsorption removal rate of the mussel shells was higher after calcination at 600℃.5%H_(3)PO_(4) solution was more suitable for shell treatment than 3 mol/L Zncl_(2) *** the dosage of the modified shells was 0.5 g/L,the adsorption reached a stable state,and the removal rate of PAHs was about 69.44%;the adsorption efficiency rose with the increase of *** can be seen that as a new and cheap biological adsorbent,the modified shells can be used to remove PAHs from wastewater.

关键词： Mussel shells Adsorption Polycyc.ic aromatic hydrocarbons

Nasal vac.ination of triple-RBD scaffold protein with flagellin elicits long-term protec.ion against SARS-coV-2 variants including JN.1

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Signal Transduc.ion and Targeted Therapy 2024年第5期9卷 2312-2323页

作者： Xian Li Mengxin Xu Jingyi Yang Li Zhou Lin Liu Min Li Shasha Wang Mei-Qin Liu Zhixiang Huang Zhen Zhang Shuning Liu Yunqi Hu Haofeng Lin Bowen Liu Ying Sun qingguo Wu Zheng-Li Shi Ke Lan Yu chen Huimin Yan Yao-Qing chen Wuhan institute of Virology Chinese Academy of SciencesWuhanChina Vac.ine and immunology Research center Translational Medical Research InstituteShanghai Public Health Clinical CenterFudan UniversityShanghaiChina University of c.inese Academy of Sciences BeijingChina School of Public Health(Shenzhen) Shenzhen Campus of Sun Yat-sen UniversityShenzhenGuangdongChina State Key Laboratory of Virology Modern Virology Research CenterCollege of Life SciencesWuhan UniversityWuhanChina Aerosol Bio-Tech(Suzhou)co. LTDSuzhouJiangsuChina National Medical Products Administration Key Laboratory for Quality Monitoring and Evaluation of Vac.ines and Biological Products Sun Yat-sen UniversityGuanzhouChina

Developing a mucosal vac.ine against SARS-coV-2 is c.itical for combatting the ***,we investigated long-term immune responses and protec.ion against SARS-coV-2 for the intranasal vac.ination of a triple receptor-binding domain(RBD)scaffold protein(3R-Nc)adjuvanted with a flagellin protein(KFD)(3R-Nc+KFDi.n).in mice,the vac.ination elicited RBD-specific broad-neutralizing antibody responses in both serum and mucosal sites sustained at high level over a *** long-lasting humoral immunity was correlated with the presence of long-lived RBD-specific.igG-and igA-producing plasma cells,alongside the Th17 and Tfh17-biased T-cell responses driven by the KFD *** upon these prec.inical findings,an open labeled c.inical trial was conducted in individuals who had been primed with the inac.ivated SARS-coV-2(iAV)*** a favorable safety profile,the 3R-Nc+KFDi.n boost elicited enduring broad-neutralizing igG in plasma and igA in salivary *** meet the challenge of frequently emerged variants,we further designed an updated triple-RBD scaffold protein with mutated RBD combinations,which can induce adaptable antibody responses to neutralize the newly emerging variants,including *** findings highlight the potential of the KFD-adjuvanted triple-RBD scaffold protein is a promising prototype for the development of a mucosal vac.ine against SARS-coV-2 infec.ion.

关键词： vac.ination vac.ine sustained

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高铁泥岩隧道围岩蠕变对仰拱底鼓的影响

铁道工程学报 2024年第3期41卷 80-85页

作者：梁庆国岳建平周稳弟孙纬宇李景兰州交通大学兰州730070

研究目的:针对泥岩地区高铁隧道修建过程中出现的仰拱底鼓病害,本文采用参数反演与数值模拟相结合的方法,全面分析围岩蠕变对仰拱底鼓的影响,并采用锚杆支护与仰拱加强的工程措施对仰拱底鼓进行治理。研究结论:(1)Burgers模型能较好地... 详细信息

研究目的:针对泥岩地区高铁隧道修建过程中出现的仰拱底鼓病害,本文采用参数反演与数值模拟相结合的方法,全面分析围岩蠕变对仰拱底鼓的影响,并采用锚杆支护与仰拱加强的工程措施对仰拱底鼓进行治理。研究结论:(1)Burgers模型能较好地符合泥岩表现出的明显的衰减蠕变和稳定蠕变特征;(2)随着时间的增加,围岩不断向洞内发生变形,且隧道拱顶沉降、水平收敛和拱底隆起一直在增大,并经历了三个阶段:瞬时变形阶段、衰减蠕变阶段与稳定蠕变阶段;(3)仰拱结构内力随着蠕变时间增加同样在增大,并在蠕变一定年限后,仰拱填充中心的拉应力将超过混凝土的抗拉强度,导致仰拱填充沿中心位置开裂;(4)锚杆支护的最优长度为5 m,最佳间距为0.9~1.2 m,在此基础上通过加强仰拱来进一步抑制仰拱底鼓变形,并且建议仰拱支护强度选用c30~c40;(5)本研究结果可为类似工程的建设与施工提供建议与参考。

关键词：泥岩隧道仰拱底鼓参数反演数值模拟底鼓控制

A^(2)/O-BcO前置反硝化除磷中试的启动与优化运行

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环境科学学报 2024年第3期44卷 13-22页

作者：周庆国苏健陈东旭彭永臻西南交通大学土木工程学院成都610031 中铁建发展集团有限公司水处理技术研究中心北京100043 北京工业大学城镇污水深度处理与资源化利用国家工程实验室北京市水质科学与水环境恢复工程重点实验室北京100124

为探究低c/N城镇污水处理在无外加碳源的情况下实现深度脱氮除磷的效能,试验以实际城镇生活污水为处理对象,搭建了日处理规模为100 m^(3)·d^(-1)的A^(2)/O-BcO前置反硝化除磷中试,并从中试快速启动、工况调整与优化、微生物群落分析等... 详细信息

为探究低c/N城镇污水处理在无外加碳源的情况下实现深度脱氮除磷的效能,试验以实际城镇生活污水为处理对象,搭建了日处理规模为100 m^(3)·d^(-1)的A^(2)/O-BcO前置反硝化除磷中试,并从中试快速启动、工况调整与优化、微生物群落分析等角度进行研究.结果表明,通过先在A^(2)/O单元与BcO单元中分别富集聚磷菌与硝化菌,再增加硝化液回流以富集反硝化除磷菌(DPAOs)的方式,可实现A^(2)/O-BcO前置反硝化除磷中试的快速启动.A^(2)/O单元厌氧/缺氧/好氧容积比调整为3∶5∶1,硝化液回流比设定为250%时,缺氧段对磷去除率的平均值达到95%,平均出水PO_(4)^(3-)-P浓度小于0.2 mg·L^(-1),出水TN小于11 mg·L^(-1).通过分子生物学分析发现,除磷菌(PAOs)与硝化菌丰度显著提高,candidatus Accumulibacter的相对丰度从原始种泥的2%增加到14%,已被证实具有反硝化聚磷功能的Dechloromonas的相对丰度从原始种泥的2%增加到7%,BcO单元中的生物膜上,Nitrosomonas的相对丰度为5.91%,Nitrospira的相对丰度为7.58%.

关键词：低c/N城镇污水前置反硝化除磷中试规模无外加碳源快速启动

大剂量左甲状腺素钠片治疗妊娠合并甲状腺功能减退症的效果

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临床医学研究与实践 2024年第4期9卷 143-146页

作者：蔡蕾崇庆国射阳县人民医院江苏盐城224300 盐城市第三人民医院江苏盐城224000

目的探讨大剂量左甲状腺素钠片治疗妊娠合并甲状腺功能减退症的效果。方法选取2016年11月至2021年11月收治的200例妊娠合并甲状腺功能减退症患者为研究对象,将其随机分为A组和B组,各100例。A组予以小剂量左甲状腺素钠片治疗,B组予以大... 详细信息

目的探讨大剂量左甲状腺素钠片治疗妊娠合并甲状腺功能减退症的效果。方法选取2016年11月至2021年11月收治的200例妊娠合并甲状腺功能减退症患者为研究对象,将其随机分为A组和B组,各100例。A组予以小剂量左甲状腺素钠片治疗,B组予以大剂量左甲状腺素钠片治疗。比较两组的治疗效果。结果治疗后,B组的甲状腺长径短于A组,甲状腺过氧化物酶抗体(TPOAb)、促甲状腺激素(TSH)水平低于A组,游离甲状腺素(FT4)水平高于A组(P0.05)。治疗后,B组的高密度脂蛋白胆固醇(HDL-c)水平高于A组,甘油三酯(TG)、总胆固醇(Tc)、低密度脂蛋白胆固醇(LDL-c)水平低于A组(P0.05)。结论大剂量左甲状腺素钠片治疗妊娠合并甲状腺功能减退症患者的效果更佳,能够明显改善甲状腺功能及血脂代谢异常,有利于改善妊娠结局,整体安全性良好。

关键词：左甲状腺素钠片大剂量妊娠合并甲状腺功能减退症血脂代谢妊娠结局甲状腺功能

含缺陷c/c-Sic缎纹编织复合材料的压缩损伤及失效机制

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Strain-Rate-Dependent in-Plane compressive Properties of 3D Fine Weave Pierced c/c composite:Failure Mechanism and constitutive Model

材料工程 2024年第9期52卷 169-179页

作者：许志远谭志勇徐培飞张大海费庆国东南大学机械工程学院南京 211189 高速飞行器结构与热防护教育部重点实验室南京 211189 江苏省空天机械装备工程研究中心南京 211189 北京临近空间飞行器系统工程研究所北京 100076

为了研究含孔隙缺陷缎纹编织复合材料的压缩力学性能和失效机制,开展了含孔隙c/c-Sic缎纹编织复合材料的经向压缩实验;通过基于离散单元法的爆炸碎片算法来引入随机孔隙,建立了含孔隙缺陷缎纹编织复合材料的细观强度预测模型.基于该模... 详细信息

为了研究含孔隙缺陷缎纹编织复合材料的压缩力学性能和失效机制,开展了含孔隙c/c-Sic缎纹编织复合材料的经向压缩实验;通过基于离散单元法的爆炸碎片算法来引入随机孔隙,建立了含孔隙缺陷缎纹编织复合材料的细观强度预测模型.基于该模型模拟了经向压缩载荷下细观模型的渐进失效过程,揭示了孔隙对损伤过程的影响规律,结合实验数据对渐进损伤过程和失效机制预测模型进行了验证.结果表明,在经向压缩载荷下材料主要破坏模式为剪切破坏和分层破坏,具体表现为三种形式:层间局部基体开裂、基体与经纱脱粘后分层,经纱整束断裂、部分断裂,以及纬纱脱粘与基体分离、纬纱开裂.同时数值模拟结果与实验值基本相同,验证了该含孔隙缺陷c/c-Sic缎纹编织复合材料模型的有效性,为二维编织复合材料的力学性能研究提供了一种有效方法.

关键词：编织复合材料渐进损伤爆炸碎片算法数值模拟压缩力学性能

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Acta Mechanica Solida Sinica 2022年第1期35卷 63-78页

作者： Fei Guo qingguo Fei Yanbin LiL Nikhil Gupta Jiangsu Engineering Research center of Aerospace Mac.inery Southeast UniversityNanjing 211189China Department of Engineering Mechanics Southeast UniversityNanjing 211189China School of Mechanical Engineering Southeast UniversityNanjing 211189China composite Materials and Mechanics Laboratory Department of Mechanical and Aerospace EngineeringTandon School of EngineeringNew York UniversityBrooklynNY 11201USA

in-plane compression experiments are performed on 3D fine weave pierced c/c composite at a wide strain rate range of 0.0001/s-1000/*** in-plane compressive failure mechanism of the composite at quasi-static and high strain rates is analyzed by a scanning electron *** results show that the in-plane compressive modulus,maximum stress and the corresponding strain increase with increasing strain *** quasi-static.in-plane compressive failure mode of the 3D fine weave pierced c/c composite is characterized by the shear failure at the angle of 45°and the local buckling of the^direc.ion fiber *** comparison,the high strain rate in-plane compression failure mode of the composite is characterized by the compressive fracture of the interlaminar matrix and the progressive compression failure of the a>direc.ion fiber bundles.A strain-rate-dependent in-plane compressive constitutive model is proposed to predict the dynamic.in-plane compressive response of the *** proposed constitutive model is verified by experimental data.

关键词： c/c composite compression Failure mechanism constitutive model

Fatigue Life of a 2.5D c/Sic composite Under Tension–Tension cyc.ic Loading:Experimental investigation and Sensitivity Analysis

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Acta Mechanica Solida Sinica 2021年第5期34卷 645-657页

作者： Jingwei Yu qingguo Fei Peiwei Zhang Yanbin Li Qiang chen School of Mechanical Engineering Southeast UniversityNanjing211189China Jiangsu Engineering Research center of Aerospace Mac.inery Southeast UniversityNanjing211189China

Engineering structures made of ceramic matrix composites(cMcs)usually suffer from cyc.ic loads during service,which could lead to disastrous *** work focuses on the fatigue behavior of a 2.5D c/Sic composite under tension–tension cyc.ic *** of the 2.5D c/Sic composite are firstly carried out to determine the fatigue lifetime of the material at different stress *** fracture surfaces examined by a scanning electronic microscope indicate that the damage mechanisms under cyc.ic loading are closely related to crack propagation,fiber/matrix interfacial degradation,and fiber *** the damage evolution of fibers and interfacial resistance,a micromechanical model is adopted to desc.ibe the fatigue behavior of 2.5D c/Sic composite,and the numerical results are compared with the experimental ***,a sensitivity analysis is performed as a func.ion of the interfacial shear stress,fiber Weibull modulus,and fiber *** calculation of sensitivity factors shows that the variations of the fiber Weibull modulus and fiber strength have the most significant influence and,thereafter,the variation of interfacial shear stress.

关键词： ceramic matrix composites(cMcs) 2.5D c/Sic composite Fatigue Mechanical properties Sensitivity