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Synergically enhanced piezocatalysis performance of eco-friendly(K_(0.52)Na_(0.48))NbO_(3) through ferroelectric polarization and defects

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矿物冶金与材料学报:英文版 2023年第10期30卷 2044-2054页

作者： Min Zhou Laijun Liang Dingze lu xiaomei lu Zheng Wang Fengzhen Huang Pengfei Cheng Dongdong Liu Mengqi Tian Qiuping Wang Yunjie Zhang School of Science Xi’an Polytechnic UniversityXi’an 710048China National Laboratory of Solid State Microstructures and Physics School Nanjing UniversityNanjing 210093China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China School of Advanced Materials and Nanotechnology Xidian UniversityXi’an 710126China National Engineering Laboratory for Modern Silk College of Textile and Clothing EngineeringSoochow UniversitySuzhou 215123China

Piezocatalysis has attracted unprecedented research interest as a newly emerging catalysis ***,the inherent insulating property of ferroelectric materials ultimately leads to the poor vibration-electricity conversion ***,this work reports the(K_(0.52)Na_(0.48))NbO_(3) ferroelectric ceramics(KNNFCx),for which the FeCo modification strategy is *** substitution of the moderate amount of FeCo(x=0.015)at Nb site not only optimizes ferroelectricity but also produces beneficial defects,notably increasing Rhodamine B water purification efficiency to 95%.The pinning effect of monovalent oxygen vacancies on ferroelectric domains is responsible for the excellent ferroelectric polarization of KNNFC0.015 through the generation of an internal field to promote charge carriers separation and reduce nonradiative ***,the accompanying electron carriers can easily move to the material surface and participate in redox reactions because they have low activation ***,ferroelectric polarization and defects play synergetic roles in enhancing piezocatalytic performance.

关键词： piezocatalytic water purification ferroelectric polarization beneficial defects

Mean Square Exponential Stability of Uncertain Linear Impulsive Stochastic Systems with Markovian Switching

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Mean Square Exponential Stability of Uncertain Linear Impuls...

Dynamics and manipulation of ferroelectric domain walls in bismuth ferrite thin films

第25届中国控制与决策会议

作者： Wu-Hua Chen Chenghai Wei xiaomei lu College of Mathematics and Information Science Guangxi University Guangxi Key Laboratory of Power System Optimization and Energy Technology Guangxi University

ISBN: (纸本)9781467355339

This paper considers mean square exponential stability of uncertain linear impulsive systems with Markovian switching. By employing the method of time-varying Lyapunov functions, some new sufficient conditions for mean square exponential stability are established. The new stability conditions depend on both on the lower bound and the upper bound of impulse intervals. Numerical examples are provided to show the effectiveness of the proposed method.

关键词： Impulsive Systems Stochastic Systems Markovian Switching Exponential Stability

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National Science Review 2020年第2期7卷 278-284页

作者： Shuyu Xiao Yaming Jin xiaomei lu Sang-Wook Cheong Jiangyu Li Yang Li Fengzhen Huang Jinsong Zhu National Laboratory of Solid State Microstructures and Physics School Nanjing University Collaborative Innovation Center of Advanced Microstructures Nanjing University Rutgers Center for Emergent Materials and Department of Physics and Astronomy Rutgers University Shenzhen Key Laboratory of Nanobiomechanics Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Department of Mechanical Engineering University of Washington

Ferroelectric domain walls differ from domains not only in their crystalline and discrete symmetry, but also in their electronic, magnetic, and mechanical properties. Although domain walls provide a degree of freedom to regulate the physical properties at the nanoscale, the relatively lower controllability prevents their practical applications in nano-devices. In this work, with the advantages of 3D domain configuration detection based on piezoresponse force microscopy, we find that the mobility of three types of domain walls(tail-to-tail, head-to-tail, head-to-head) in(001) BiFeO3films varies with the applied electrical field. Under low voltages, head-to-tail domain walls are more mobile than other domain walls, while, under high voltages, tail-to-tail domain walls become rather active and possess relatively long average lengths. This is due to the high nucleation energy and relatively low growth energy for charged domain walls. Finally, we demonstrate the manipulation of domain walls through successive electric writings, resulting in well-aligned conduction paths as designed, paving the way for their application in advanced spintronic, memory and communication nano-devices.

关键词： domain wall ferroelectric thin film piezoresponse force microscopy dynamics

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CBL教学法对产科实习考核促进作用的研究

中国高等医学教育 2024年第1期 83-84页

作者：吕小梅刘梦瑶李福丽梁莉田庆芬济南市中心医院山东济南250014

目的:研究CBL教学法对产科实习生多模式出科考核的促进作用。方法:选择在我科实习的100名临床医学本科实习生作为研究对象,随机分为试验组和对照组,各50人。其中试验组按照CBL教学法进行临床实习,对照组按照传统带教模式进行临床实习。... 详细信息

目的:研究CBL教学法对产科实习生多模式出科考核的促进作用。方法:选择在我科实习的100名临床医学本科实习生作为研究对象,随机分为试验组和对照组,各50人。其中试验组按照CBL教学法进行临床实习,对照组按照传统带教模式进行临床实习。结果:3周实习后,试验组学生的Mini-CEX和DOPS出科考核成绩均明显高于对照组,差异有统计学意义(P<0.05),且学生满意度更高。结论:CBL教学法对产科实习生多模式出科考核成绩和学生满意程度均有促进作用。

关键词： CBL Mini-CEX DOPS 产科实习

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Disturbance observer-based control design for a class of nonlinear stochastic systems with periodically intermittent measurement

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ITGA2B基因复合杂合突变所致遗传性血小板无力症家系分析及致病机制研究

第36届中国控制会议

作者： Kui Ding Wu-Hua Chen xiaomei lu Zhen Ruan College of Mathematics and Information Science Guangxi University

ISBN: (纸本)9781538629185

This paper treats the control problem of a class of nonlinear stochastic systems with unknown external disturbance and periodically intermittent measurement. It is assumed that the external disturbance is generated by an exogenous system with unknown initial condition, and the state information ia available only on some disconnected time intervals. A composite control method using the intermittent state information is proposed, which consists of an intermittent feedback control law and a disturbance observer. The stability property of the closed-loop error system is analyzed using a piecewise-time-dependent Lyapunov function approach. Then, a sufficient condition for the existence of the desired composite controllers is derived in terms of matrix inequalities. Finally, a numerical example is given to illustrate the effectiveness of the proposed result.

关键词： Disturbance observer-based control Periodically intermittent measurement Piecewise time-dependent Lyapunov function Linear matrix inequalities(LMIs)

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中华血液学杂志 2024年第4期45卷 370-377页

作者：卢晓梅付栋彦张耀方赵丽东王蕾杨嘉刘杰郑嘉伟杨林花王刚山西医科大学第二临床医学院(第二医院)血液科、山西医科大学血液病学研究所太原030001

目的对一个ITGA2B基因复合杂合突变导致的遗传性血小板无力症家系进行表型及基因型研究,并探索其分子致病机制。方法使用二磷酸腺苷、胶原、肾上腺素、花生四烯酸及瑞斯托霉素等诱聚剂进行血小板聚集试验,检测先证者及家系成员的血小板... 详细信息

目的对一个ITGA2B基因复合杂合突变导致的遗传性血小板无力症家系进行表型及基因型研究,并探索其分子致病机制。方法使用二磷酸腺苷、胶原、肾上腺素、花生四烯酸及瑞斯托霉素等诱聚剂进行血小板聚集试验,检测先证者及家系成员的血小板聚集率。通过流式细胞术检测血小板表面CD41(αⅡb)、CD61(β3)、CD42b(GPⅠb)的表达。采用基因测序技术进行基因鉴定。利用RT-PCR检测ITGA2B基因mRNA剪接情况,qRT-PCR检测ITGA2B基因mRNA相对水平。生物信息学分析评估突变位点的致病性及对蛋白结构和功能的影响。通过Western blot检测分析血小板总αⅡb、β3的表达。结果除瑞斯托霉素外其他4种诱聚剂均无法使先证者血小板聚集。流式细胞术检测先证者血小板表面αⅡb的表达仅为0.25%,β3弱表达为9.76%,而GPⅠb表达相对正常,其余家系成员膜糖蛋白表达基本正常。基因测序结果显示先证者存在ITGA2B基因c.480C>G与c.2929C>T复合杂合突变,其中c.480C>G突变遗传自其母亲,c.2929C>T遗传自其父亲。RT-PCR及测序结果表明c.480C>G突变导致先证者及其母亲发生c.476G-574A(p.S160-S192)共99个碱基缺失的mRNA剪接。qRT-PCR检测发现c.2929C>T突变导致先证者及其父亲ITGA2B基因mRNA水平减低。生物信息学分析提示c.480C>G突变形成了与hnRNP A1蛋白结合序列,产生了5'SS剪接位点。αⅡb亚基的蛋白三维结构模型显示,p.S160-S192缺失的β-propeller结构域第2 blade缺失两条β链和一个α螺旋;c.2929C>T无义突变使得翻译提前终止产生p.R977-E1039缺失的截短型蛋白,包括胞质域(CD)、跨膜域(TM)以及胞外Calf-2结构域一条β链的缺失。Western blot检测先证者血小板总αⅡb表达缺失、β3的相对表达量为正常人的11.36%。结论ITGA2B基因第4外显子c.480C>G与第28外显子c.2929C>T的复合杂合突变是本家系遗传性血小板无力症的致病原因。

关键词：遗传性血小板无力症 ITGA2B基因整合素αⅡbβ3 mRNA剪接无义突变

Star-shaped conjugated oligoelectrolyte for bioimaging in living cells

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Chinese Science Bulletin 2013年第21期58卷 2570-2575页

作者： SONG WenLi JIANG RongCui YUAN Yan lu xiaomei HU WenBo FAN QuLi HUANG Wei Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM) Nanjing University of Posts & Telecommunications (NJUPT)

A new star-shaped oligoelectrolyte (TEFCOONa) with triphenylamine as the core, acetylene as linkage and anionic fluorenes as arms was obtained and used for direct imaging in living PANC-1 cells. Because of the hydrophobic conjugated groups of the oli-goelectrolyte, TEFCOONa can form nanospheres with an average diameter of^75 nm in 10 mmol/L PBS. These nanospheres possess a relatively high absolute quantum yield (16.5% in PBS), low cytotoxicity and can penetrate into the nucleus through the cytoplasm, which is essential for living cellular imaging. Collectively, these results validate our rational design of conjugated oligoelectrolyte and even hyper branched polymers-copolyelectrolyte as effective nanovectors for bioimaging and other clinical applications.

关键词：活细胞成像生物成像共轭星形超支化聚合物直接成像平均直径纳米微球

Confidence Measure of the Shallow-Water Bathymetry Map Obtained through the Fusion of Lidar and Multiband Image Data

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Journal of Remote Sensing 2021年第1期2021卷 273-288页

作者： Zhongping Lee Mingjia Shangguan Rodrigo AGarcia Wendian Lai xiaomei lu Junwei Wang Xiaolei Yan School for the Environment University of Massachusetts BostonBostonMA 02125USA State Key Laboratory of Marine Environmental Science College of Ocean and Earth SciencesXiamen UniversityXiamen 361102China School of Earth Sciences University of Western AustraliaCrawleyWA 6009Australia Science Systems and Applications Inc.HamptonVA 23666USA

With the advancement of Lidar technology,bottom depth(H)of optically shallow waters(OSW)can be measured accurately with an airborne or space-borne Lidar system(H_(Lidar) hereafter),but this data product consists of a line format,rather than the desired charts or maps,particularly when the Lidar system is on a ***,radiometric measurements from multiband imagers can also be used to infer H(H_(imager) hereafter)of OSW with variable accuracy,though a map of bottom depth can be *** is logical and advantageous to use the two data sources from collocated measurements to generate a more accurate bathymetry map of OSW,where usually image-specific empirical algorithms are developed and ***,after an overview of both the empirical and semianalytical algorithms for the estimation of H from multiband imagers,we emphasize that the uncertainty of H_(imager) varies spatially,although it is straightforward to draw regressions between H_(Lidar) and radiometric data for the generation of H_(imager).Further,we present a prototype system to map the confidence of H_(imager) pixel-wise,which has been lacking until today in the practices of passive remote sensing of *** advocate the generation of a confidence measure in parallel with H_(imager),which is important and urgent for broad user communities.

关键词： Lidar image hereafter

Unveiling the performance of a novel alkalizing bacterium Enterobacter ***-2 in immobilization of available Cd

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Journal of Environmental Sciences 2024年第3期137卷 245-257页

作者： Yixin luo Min Liao Xiongxiong lu Na Xu xiaomei Xie Weiming Gao College of Environmental and Resource Science Zhejiang UniversityHangzhou 310058China Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment Hangzhou 310058China National Demonstration Center for Experimental Environmental and Resources Education Zhejiang UniversityHangzhou 310058China

A novel alkalizing strain Enterobacter ***-2 that could resist 400 mg/L Cd was isolated from Cd-contaminated soil,which immobilized 96.05%Cd^(2+)from *** distribution analysis demonstrated that more than half of the Cd^(2+)was converted into extracellular precipitated Cd through mobilization of the alkali-producing mechanism by the strain LYX-2,achieving the high immobilization efficiency of Cd^(2+).Biosorption experiments revealed that strain LYX-2 had superior biosorption capacity of 48.28 mg/g for *** experiments with Brassica rapa *** performed with and without strain *** to control,15.92%bioavailable Cd was converted to non-bioavailable Cd and Cd content in aboveground vegetables was decreased by 37.10%with addition of strain *** Cd was mainly immobilized through extracellular precipitation,cell-surface biosorption and intracellular accumulation of strain LYX-2,which was investigated through Cd distribution,Scanning Electron Microscope and Energy-Dispersive X-ray Spectroscopy(SEM-EDS),Fourier Transform Infrared Spectroscopy(FT-IR),X-ray Photoelectron Spectroscopy(XPS)and Transmission Electron Microscopy(TEM)*** addition,the application of strain LYX-2 significantly promoted the growth of vegetables about *** results indicated that highly Cd-resistant alkalizing strain LYX-2,as a novel microbial passivator,had excellent ability and reuse value to achieve the remediation of Cd-contaminated soil coupled with safe production of vegetables simultaneously.

关键词： Cadmium Enterobacter sp.LYX-2 Cd Immobilization Microbial passivator