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Electrospun PVA Nanofibrous Membranes Reinforced with Silver Nanoparticles Impregnated Cellulosic Fibers:Morphology and Antibacterial Property

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Chemical Research in Chinese Universities 2021年第3期37卷 505-511页

作者： YAN Jie WANG dong BAI Tian CHENG Wanli HAN Guangping NI xiaohui SHI q.Sheldon Key Laboratory of Bio-based Material Science&Technology Ministry of EducationNortheast Forestry UniversityHarbin150040P.R.China School of Art and Design Taizhou UniversityTaizhou318000P.R.China Mechanical Engineering Department University of North TexasUNT Discovery Park3940 North Elm St.Suite F101PDentonTexas76207-7102USA

To enhance the mechanical and antibacterial properties of silver nanoparticle impregnated cellulosic fibers,carboxy-cellulose nanocrystals(CCNs)were grafted with chitooligosaccharide(COS),which was used as a stabilizer for silver nanoparticles(AgNPs).Nanofibrous membranes reinforced with silver nanoparticle impregnated cellulosic fibers(CCN-COS-AgNP)were prepared via electrospinning using polyvinyl alcohol(PVA)as a *** effects of CCN-COS-AgNP contents on the morphology,surface composition,mechanical properties,and antibacterial performances of the prepared CCN-COS-AgNP/PVA membranes were *** addition of CCN-COS-AgNP certainly improved the mechanical properties and antibacterial performances of the PVA *** tensile strength was significantly increased from 4.40 MPa to 8.60 MPa when 8%CCN-COS-AgNP(mass ratio)was *** 10%(mass ratio)CCN-COS-AgNP was added,the nanofibers showed an excellent antibacterial activity for ***(Staphylococcus aureus)and ***(Escherichia coli),with the maximum inhibition zones of 2.30 and 1.60 cm,***,the 2%(mass ratio)CCN-COS-AgNP/PVA fibrous membrane showed 126%cell viability for mg63 human *** electrospun PVA membrane has great potential application in biomedical field.

关键词： Electrospun membrane Carboxy-cellulose Silver nanoparticle Antibacterial performance Polyvinyl alcohol

Routing Protocol for Heterogeneous FANETs with Mobility Prediction

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China Communications 2022年第1期19卷 186-201页

作者： qihui Wu Min Zhang Chao dong Yong Feng Yanli Yuan Simeng Feng Tony q.S.quek The Key Laboratory of Dynamic Cognitive System of Electromagnetic Spectrum Space Ministry of Industry and Information TechnologyNanjing University of Aeronautics and AstronauticsNanjing 210016China The Shell Eastern Petroleum Pte.Ltd. Singapore 903808Singapore The Dept.of Information Systems Technology and Design Singapore University of Technology and DesignSingapore 487372Singapore

In recent years,with the growth in Unmanned Aerial Vehicles(UAVs),UAV-based systems have become popular in both military and civil *** these scenarios,the lack of reliable communication infrastructure has motivated UAVs to establish a network as flying nodes,also known as Flying Ad Hoc Networks(FANETs).However,in FANETs,the high mobility degree of flying and terrestrial users may be responsible for constant changes in the network topology,making end-to-end connections in FANETs *** estimation and prediction of UAVs can address the challenge mentioned above since it can provide better routing planning and improve overall FANET performance in terms of continuous service *** thus develop a Software Defined Network(SDN)-based heterogeneous architecture for reliable communication in *** this architecture,we apply an Extended Kalman Filter(EKF)for accurate mobility estimation and prediction of *** particular,we formulate the routing problem in SDN-based Heterogeneous FANETs as a graph decision *** the problem is NP-hard,we further propose a Directional Particle Swarming Optimization(DPSO)approach to solve *** extensive simulation results demonstrate that the proposed DPSO routing can exhibit superior performance in improving the goodput,packet delivery ratio,and delay.

关键词： routing unmanned aerial vehicles(UAVs) flying ad hoc networks(FANETs) mobility prediction particle swarming optimization(PSO)

D^(+)→π^(+)v■decay process within the qCDSR approach

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Chinese Physics C 2024年第6期48卷 69-81页

作者：陈宇付海冰钟涛吴胜波黄冬 Department of Physics Guizhou Minzu UniversityGuiyang 550025China Center of Experimental Training Guiyang Institute of Information Science and TechnologyGuiyang 550025China

In this paper,we investigate the charmed meson rare decay process D^(+)→π^(+)v■using an approach based on qCD sum ***,the pion twist-2,3 distribution amplitude(DA)moments|μ,are calculated up to the tenth and fourth orders,respectively,in the qCD sum rules according to the background field *** constructing the light-cone harmonic oscillator model for the pion twist-2,3 D As,we obtain their behaviors by matching the calculatedξ-***,the D→πtransition form factors(TFFs)are calculated using an approach based on qCD light-cone sum *** vector form factor at the large recoil region is f_(+)^(D)→^(π)(0)=0.627_(-0.080)^(+0.120).Using the rapidly converging simplified series expansion of z(q^(2),t),we present the TFFs and corresponding angular coefficients in the whole squared momentum transfer physical *** on nonstandard neutrino interactions,the■^(0)→π^(+)e■_(e)decay can be related to the■^(0)→π^(+)e■_(e)decay ***,we first describe the semileptonic decay process■^(0)→π^(+)e■_(e),differential decay widths,and branching fraction with B(■^(0)→π^(+)e■_(e))=0.308_(-0.066)^(+0.155)×10^(2).The■^(0)→π^(+)e■_(e)differential/total predictions for forward-backward asymmetry,q^(2)-differential flat terms,and lepton polarization asymmetry are also *** prediction for the D^(+)→π^(+)v■branching fraction isB(D^(+)→π^(+)v■)=1.85_(-0.46)+^(0.93)×10^(-8).

关键词： transition form factors pion LCDAs flavour changing neutral current transition heavy meson semileptonic decays qCD sum rule

Bi-layered coded metasurface for multi-functional hologram with broadband transmission and efficient reflection

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Chinese Optics Letters 2024年第5期22卷 8-16页

作者：朱磊李绪胜董亮谢文静尚关玉 Shah Nawaz Burokur 丁旭旻 School of Computer and Control Engineering Qiqihar UniversityQiqihar 161006China Communication and Electronics Engineering Institute Qiqihar UniversityQiqihar 161006China Heilongjiang Key Laboratory of Big Data Network Security Detection and Analysis Qiqihar UniversityQiqihar 161000China Department of Microwave Engineering Harbin Institute of TechnologyHarbin 150001China LEME UPLUniversitéParis NanterreF92410 Ville d’AvrayFrance Advanced Microscopy and Instrumentation Research Center Harbin Institute of TechnologyHarbin 150080China Key Laboratory of Millimeter Waves Southeast UniversityNanjing 210096China

A multi-functional full-space metasurface based on frequency and polarization multiplexing is *** metasurface unit consists of metallic patterns printed on the two faces of a single-layered dielectric *** unit cell can control electromagnetic wavefronts to achieve a broadband transmission with amplitudes greater than 0.4 from 4.4 to 10.4 ***,at 11.7 GHz and 15.4 GHz,four high-efficiency reflection channels with a reflection amplitude greater than 0.8 are also *** illuminated by linearly polarized waves,five different functions can be realized at five different frequencies,which are demonstrated by theoretical calculations,full-wave simulations,and experimental measurements.

关键词： multi-functional metasurface broadband transmission efficient reflection full space

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面向区域覆盖的多无人机动态通信资源分配方法

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北京航空航天大学学报 2024年第9期50卷 2939-2950页

作者：卢毛毛刘春辉董赞亮西安电子科技大学通信工程学院西安710071 中国电子科技集团公司第五十四研究所石家庄050299 北京航空航天大学无人系统研究院北京100191 北京航空航天大学电子信息工程学院北京100191

针对多无人机区域覆盖任务中的机间通信资源分配问题,提出了一种基于强化学习的多智能体动态通信资源分配模型。利用多智能体生成树覆盖方法生成任务区域内各个无人机的覆盖航线,对无人机与地面基站及无人机之间的通信链路进行建模。由... 详细信息

针对多无人机区域覆盖任务中的机间通信资源分配问题,提出了一种基于强化学习的多智能体动态通信资源分配模型。利用多智能体生成树覆盖方法生成任务区域内各个无人机的覆盖航线,对无人机与地面基站及无人机之间的通信链路进行建模。由于飞行环境的不确定性,将长期的资源分配问题建模为随机博弈模型,将无人机间的空-空链路视作一个智能体,每个智能体采取的动作包含选择工作频段和发送端的传输功率。在此基础上,基于双深度q网络(DDqN)设计多智能体强化学习(MARL)模型,使得每个智能体通过奖励函数的反馈学习到最优通信资源分配策略。仿真结果表明:MARL模型能够在动态航迹下自适应选择最佳通信资源分配策略,提高时延约束下的负载交付成功率,同时降低空-空链路对空地下行链路的干扰并增大信道总容量。

关键词：多无人机区域覆盖动态通信资源分配强化学习双深度q网络多智能体

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STABILITY OF MICROSTRUCTURES DURING COOLING PROCESSES OF Al LIqUID METAL

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中国有色金属学会会刊：英文版 1998年第4期8卷 2-7页

作者： Liu, RS Li, JY Zhou, Z dong, KJ Peng, P xie, q Zheng, Cx Hunan Univ Dept Phys Changsha 410012 Peoples R China Hunan Univ Dept Chem Changsha 410012 Peoples R China

１ＩＮＴＲＯＤＵＣＴＩＯＮＩｔｉｓｗｅｌｋｎｏｗｎｔｈａｔｔｈｅｍａｃｒｏｓｃｏｐｉｃｐｒｏｐｅｒｔｉｅｓｏｆｍｅｔａｌｓａｎｄａｌｏｙｓａｒｅｍａｉｎｌｙｄｅｔｅｒｍｉｎｅｄｂｙｔｈｅｉｒｍｉｃｒｏｓｔｒｕｃｔｕ... 详细信息

１ＩＮＴＲＯＤＵＣＴＩＯＮＩｔｉｓｗｅｌｋｎｏｗｎｔｈａｔｔｈｅｍａｃｒｏｓｃｏｐｉｃｐｒｏｐｅｒｔｉｅｓｏｆｍｅｔａｌｓａｎｄａｌｏｙｓａｒｅｍａｉｎｌｙｄｅｔｅｒｍｉｎｅｄｂｙｔｈｅｉｒｍｉｃｒｏｓｔｒｕｃｔｕｒｅｓ，ａｎｄｔｈｅｍｉｃｒｏｓｔ...

关键词： stability microstructure liquid metal rapid cooling computer simulation

Farnesyltransferase inhibitor lonafarnib suppresses respiratory syncytial virus infection by blocking conformational change of fusion glycoprotein

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Signal Transduction and Targeted Therapy 2024年第7期9卷 2970-2983页

作者： qi Yang Bao xue Fengjiang Liu Yongzhi Lu Jielin Tang Mengrong Yan qiong Wu Ruyi Chen Anqi Zhou Lijie Liu Junjun Liu Changbin qu qingxin Wu Muqing Fu Jiayi Zhong Jianwei dong Sijie Chen Fan Wang Yuan Zhou Jie Zheng Wei Peng Jinsai Shang xinwen Chen Guangzhou National Laboratory Guangzhou 510005China State Key Laboratory of Respiratory Disease Guangzhou Medical UniversityGuangzhou 511436China Wuhan Institute of Virology Chinese Academy of SciencesWuhan 430071China School of Basic Medical Sciences Guangzhou Medical UniversityGuangzhou 511436China GMUGIBH Joint School of Life Sciences Guangzhou Medical UniversityGuangzhou 511436China Guangzhou Institutes of Biomedicine and Health Chinese Academy of SciencesGuangzhou 510530China Shanghai Institute of Materia Medica Chinese Academy of SciencesShanghai 201203China School of Pharmaceutical Science and Technology Hangzhou lnstitute for Advanced StudyUCASHangzhou 310024China

Respiratory syncytial virus(RSV)is the major cause of bronchiolitis and pneumonia in young children and the *** are currently no approved RSV-specific therapeutic small molecules *** high-throughput antiviral screening,we identified an oral drug,the prenylation inhibitor lonafarnib,which showed potent inhibition of the RSV fusion *** exhibited antiviral activity against both the RSV A and B genotypes and showed low cytotoxicity in HEp-2 and human primary bronchial epithelial cells(HBEC).Time-of-addition and pseudovirus assays demonstrated that lonafarnib inhibits RSV entry,but has farnesyltransferase-independent antiviral ***-electron microscopy revealed that lonafarnib binds to a triple-symmetric pocket within the central cavity of the RSV F metastable pre-fusion *** at the RSV F sites interacting with lonafarnib showed resistance to lonafarnib but remained fully sensitive to the neutralizing monoclonal antibody ***,lonafarnib dose-dependently reduced the replication of RSV in BALB/c ***,lonafarnib could be a potential fusion inhibitor for RSV infection.

关键词： neutral metastable approved

应用诊断超声和微泡对无法手术的胰腺癌病人进行临床超声化疗：一项多中心、开放标签的随机对照试验研究

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国际医学放射学杂志 2024年第3期 373-373页

作者： F.Han Y.Wang x.dong q.Lin Y.Wang W.Gao 余翔玲

摘要目的超声化疗，即采用微泡（MB）辅助超声（US）递送化疗药物，具有增强肿瘤化疗疗效的潜力。US和MB的联合应用已被证实可以延长胰腺癌病人的生存期。这项2期

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In-Situ Chemosynthesis of ZnO Nanoparticles to Endow Wood with Antibacterial and UV-Resistance Properties

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Journal of Materials Science & Technology 2017年第3期33卷 266-270页

作者： Youming dong Yutao Yan Huandi Ma Shifeng Zhang Jianzhang Li Changlei xia Sheldon q.Shi Liping Cai MOE Key Laboratory of Wooden Material Science and Application Beijing Forestry University Beijing 100083 China College of Biological Science and Technology Beijing Forestry University Beijing 100083 China Department of Mechanical and Energy Engineering University of North Texas 3940 N Elm St. Suite F101 Denton TX 76207 United States

Hybrid wood materials have attracted considerable attention because they have combined advantages of both wood and inorganic compounds. This work investigated the microstructural morphology, thermal stability, ultraviolet（UV） stability, and antibacterial property of composites made from wood/ZnO hybrid materials through a facile in-situ chemosynthesis methods. The x-ray diffraction（xRD） and thermogravimetric analysis（TGA） results indicated that the synthesized ZnO particles had an average grain size of about 10.8 nm. The scanning electron microscopy（SEM） observations showed that ZnO nanoflowers self-assembled with nanosheets were presented in wood cell lumens and increased with increasing Zn^（2＋）concentrations. ZnO nanoparticles were also generated in the wood cell wall, which was confirmed by the results of energy-dispersive spectroscopy（EDS）. The TGA tests also indicated that the thermal stability of wood/ZnO hybrid materials was improved after the formation of ZnO inorganic particles. Finally, the results of antibacterial efficacy tests and UV resistance tests revealed that ZnO nanoparticles showed a promising future as antimicrobial agents against Escherichia coli（***） and UV resistance agents for wood protection.

关键词： Hybrid wood material Nanoflowers Zinc oxide Antibacterial property UV-resistance