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广西壮族、汉族大学生体质现状及其影响因素

人类学学报 2024年第4期43卷 638-647页

作者：马福维韦经富黄秀峰王长丽叶广彬周敏宾晓芸右江民族医学院基础医学院广西高校少数民族人类学研究重点实验室右江民族医学院公共卫生与管理学院

为了解壮族、汉族大学生体质健康现状及其相关影响因素，本研究收集并分析了广西某高校2018-2022年壮族、汉族新生的体质测试数据。结果显示，男生体质量低、超重和肥胖的比例高于女生，女生体质量正常的比例高于男生；壮族学生在50 m... 详细信息

为了解壮族、汉族大学生体质健康现状及其相关影响因素，本研究收集并分析了广西某高校2018-2022年壮族、汉族新生的体质测试数据。结果显示，男生体质量低、超重和肥胖的比例高于女生，女生体质量正常的比例高于男生；壮族学生在50 m跑、立定跳远、引体向上(男)、仰卧起坐(女)项目上的表现优于汉族，但身高、体质量、肺活量、坐位体前屈的平均值低于汉族。综合来看，壮族学生素质指数高于汉族；同一民族大学生的身体素质差异，普遍表现为体质量正常组高于超重和肥胖组；多因素回归分析显示，民族和质量指数等级均是学生体质健康的影响因素。研究提示，壮族、汉族学生体质健康现状存在一定差异，应根据不同民族、不同质量指数等级学生的体质特点，采取不同干预措施以改善学生体质健康。

关键词：民族大学生体质健康身体质量指数身体素质指数

3种鸡源乳酸菌抑制大肠杆菌生物被膜形成的比较研究

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山东农业科学 2024年第7期56卷 148-153页

作者：赵桂省庞天津陈甫刘玮李福伟邱慧玲济南市畜牧技术推广站山东济南250306 青岛农业大学海都学院山东莱阳265200 青岛农业大学动物医学院山东青岛266109 山东省农业科学院家禽研究所/济南市家禽种质创新与健康养殖重点实验室山东济南250100

试验旨在研究鼠李糖乳杆菌、戊糖片球菌和口乳杆菌3种鸡源乳酸菌对大肠杆菌生物被膜生成的影响。利用置片法对供试菌株培养48 h,定性观察细菌生长与生物被膜的形成;利用96孔微板法定量检测4种细菌生长的OD_(590)值,评价抑制生物被膜生... 详细信息

试验旨在研究鼠李糖乳杆菌、戊糖片球菌和口乳杆菌3种鸡源乳酸菌对大肠杆菌生物被膜生成的影响。利用置片法对供试菌株培养48 h,定性观察细菌生长与生物被膜的形成;利用96孔微板法定量检测4种细菌生长的OD_(590)值,评价抑制生物被膜生成的效果。结果表明,大肠杆菌培养12 h开始形成生物被膜,24 h形成典型的生物被膜,并伴有交织链接的生物被膜骨架;3种乳酸菌培养36 h均未见生物被膜骨架,OD_(590)值显示鼠李糖乳杆菌生物被膜厚度优于戊糖片球菌、口乳杆菌。与大肠杆菌共培养发现,3种乳酸菌全菌液和上清液均能显著抑制大肠杆菌生物被膜的生成,抑制效果鼠李糖乳杆菌>口乳杆菌>戊糖片球菌。结果可为探索乳酸菌拮抗大肠杆菌感染机制提供参考。

关键词：鼠李糖乳杆菌戊糖片球菌口乳杆菌大肠杆菌生物被膜形成

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Hierarchical Porous RGO/PEDOT/PANI Hybrid for Planar/Linear Supercapacitor with Outstanding Flexibility and Stability

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Nano-Micro Letters 2020年第2期12卷 19-33页

作者： fuwei Liu Luoyuan Xie Li Wang wei Chen wei wei Xian Chen Shaojuan Luo Lei Dong Qilin Dai Yang Huang Lei Wang Shenzhen Key Laboratory of Polymer Science and Technology College of Materials Science and EngineeringShenzhen UniversityShenzhen 518060People’s Republic of China College of Physics and Electronic Engineering Xinyang Normal UniversityXinyang 464000People’s Republic of China Institute of Medical Engineering School of Basic Medical SciencesXi’an Jiaotong UniversityXi’an 710061People’s Republic of China Key Laboratory of Advanced Technologies of Materials(Ministry of Education) School of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031People’s Republic of China School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006People’s Republic of China Department of Physics Southern University of Science and TechnologyShenzhen 518055People’s Republic of China Department of Chemistry Physicsand Atmospheric SciencesJackson State UniversityJacksonMS 39217USA

Many hybrid electrodes for supercapacitors(SCs)are a reckless combination without proper structural design that keeps them from fulfilling their ***,we design a reduced graphene oxide/poly(3,4-ethylenedioxythiophene)/polyaniline(RGO/PEDOT/PANI)hybrid with hierarchical and porous structure for high-performance SCs,where components fully harness their advantages,forming an interconnected and conductive framework with substantial reactive ***,this hybrid achieves a high capacitance of 535 F g^−1 along with good rate capability and *** planar SC based on this hybrid deliver an energy density of 26.89 Wh kg^−1 at a power density of 800 W kg^−*** linear SC developed via modifying a cotton yarn with the hybrid exhibits good flexibility and structural stability,which operates normally after arbitrary *** work provides a beneficial reference for developing SCs.

关键词： RGO/PEDOT/PANI Hierarchical Porous Supercapacitor High performance

Magnetically Separable and Versatile Pd/Fe3O4 Catalyst for Efficient Suzuki Cross-Coupling Reaction and Selective Hydrogenation of Nitroarenes

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Chinese Journal of Chemistry 2011年第3期29卷 525-530页

作者： Zhang, Rongzhao Liu, Jianming Li, fuwei Wang, Shoufeng Xia, Chungu Sun, wei State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou Gansu 730000 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China

Magnetic nanoparticle-supported Pd/Fe3O4 was readily prepared and proved to be versatile catalyst for efficient Suzuki cross-coupling reaction, and the reduction of nitroarenes under mild conditions （balloon H2 pressure and room temperature）. The catalyst could be conveniently recovered and reused several times with sustained catalytic activity.

关键词： nanoparticles Fe3O4 supported catalyst Suzuki coupling reaction reduction

Research on emergency rescue technology and equipment for train operation accidents on a heavy-haul railway network

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Transportation Safety and Environment 2020年第4期2卷 260-270页

作者： Xianping Zhou Xiang wei Lin Ma fuwei Bai Hongwei Huang Institute of Science and Technology Daqin Railway CompanyNo.328Jianshe North RoadTaiyuanShanxi030013China

Bridges,tunnels,cuttings and high subgrade account for a relatively large proportion in China’s heavy-haul railway system,where 10000 t of unit trains and 20000 t of combined trains are in *** a train operation accident occurs,it can easily cause vehicle intrusions,slant-span lines,tipping and *** on the viewpoint of system engineering,rescue methods such as hoisting,lifting,pulling and overturning are integrated,according to the characteristics of heavy-haul transport and the construction practice of train accident rescue system.A scheme of technical research and equipment configuration relating to heavy-haul railway rescue in China is put forward based on the situation—embankment,bridge,tunnel(including cuttings),ramp and curve rescue,and so on—and three-dimensional finite-element modelling and calculation checks on the key components are carried out.

关键词： heavy-haul railway train operation accident rescue technology rescue equipment

Slug Flow Characteristics in Inclined and Vertical Channels

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Fluid Dynamics & Materials Processing 2019年第5期15卷 583-595页

作者： Zhihui Wang wei Luo Ruiquan Liao Xiangwei Xie fuwei Han Hongying Wang Petroleum Engineering Institute of Yangtze University WuhanChina Laboratory of Multiphase Pipe Flow Gas Lift Innovation CenterChina National Petroleum CorpWuhanChina The Branch of Key Laboratory of CNPC for Oil and Gas Production Yangtze UniversityJingzhouChina Exploration Department of Petro China Tarim Oilfield Company KorlaChina The Third Drilling Company of Bohai Drilling Engineering Co. Ltd.of CNPCTianjinChina Research and Development Center Tuha Oilfield CompanyCNPCTulufanChina

Horizontal well production technology gradually occupies a dominant position in the petroleum *** the rise in water production in the later stage of exploitation,slug flow phenomena will exist in horizontal,inclined and even vertical sections of gas *** grasp the flow law of slug flow and guide engineering practice,the flow law of slug flow at various inclination angles(30°~90°)is studied by means of the combination of laboratory experiments(including high frequency pressure data acquisition system)and finite element numerical *** results reveal that because of the delay of pressure variation at the corresponding position of pipeline resulting from gas expansion,the highest point of pressure change curve corresponds not to the highest point of liquid holdup curve(pressure change lags behind 0.125 s of liquid holdup change).Thus,the delay of pressure should be highlighted in predicting slug flow using pressure parameter change;otherwise the accuracy of prediction will be affected when slug flow *** is generally known that liquid holdup and pressure drop are the major factors affecting the pressure variation and stable operation of ***,the results of finite element numerical simulation and Beggs-Brill model calculation are compared with those of laboratory *** numerical simulation method is applicable to predicting the pressure drop of the pipeline,while the Beggs-Brill model is more suitable for predicting the liquid holdup variation of the *** research conclusion helps reveal the slug flow law,and it is of a scientific guiding implication to the prediction method of flow parameters under slug flow pattern in the process of gas well exploitation.

关键词： Slug flow volume liquid holdup pressure pressure drop flow pattern numerical simulation

Graphene stirrer with designed movements:Targeting on environmental remediation and supercapacitor applications

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Green Energy & Environment 2018年第1期3卷 86-96页

作者： Yang Huang wei Chen Hongfei Li Minshen Zhu fuwei Liu Qi Xue Zengxia Pei Zifeng Wang Lei Wang Yan Huang Chunyi Zhi Shenzhen Key Laboratory of Polymer Science and Technology College of Materials Science and EngineeringShenZhen University Department of Materials Science and Engineering City University of Hong Kong Institute of Medical Engineering School of Basic Medical SciencesXi'an Jiaotong University State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology(Shenzhen) School of Materials Science and Engineering Harbin Institute of Technology (Shenzhen) Shenzhen Research Institute City University of Hong Kong

Beyond the traditional focus on improvements in mechanical, electronic and absorption properties, controllability, actuation, and dynamic response of monoliths have received increasing attentions for practical applications. However, most of them could only realize simple response to constant conditions(e.g. a stationary magnetic field) while carrying out humdrum motions. By controlling distribution of metal organic framework obtained carbon-enriched Fe304 nanoparticles in self-assembly reduced graphene oxide(RGO) monoliths, we could achieve two distinctive RGO-Fe_3 O_4 stirrers that could dynamically respond to the rapidly changing magnetic field while executing designed movements precisely: rotating with lying down posture or standing straight posture. These stirrers can not only be applied in environmental remediation(*** skimmer), but also be recycled as electrode active materials for supercapacitors after fulfilling their destiny, realizing transformation of trash to treasure, which will inspire other dynamically responsive monoliths for various applications.

关键词： Desinged movements Reduced graphene oxide Metal-organic framework Fe3O4 Stirrer

股市发展能够推动产业转型升级吗--来自中国A股上市公司的证据

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财贸经济 2010年第9期31卷 37-43页

作者：汪炜李甫伟浙江大学金融研究院浙江大学民营经济研究中心浙江大学经济学院

金融发展对经济增长的贡献已经成为众多研究文献的共识,然而资本市场对产业转型升级是否具有促进作用却尚未得到证实。本文从产业的基本财务特征入手,揭示了股票市场对产业转型升级的影响机制,进而我们以股市融资依赖度、市盈率和beta... 详细信息

金融发展对经济增长的贡献已经成为众多研究文献的共识,然而资本市场对产业转型升级是否具有促进作用却尚未得到证实。本文从产业的基本财务特征入手,揭示了股票市场对产业转型升级的影响机制,进而我们以股市融资依赖度、市盈率和beta值作为行业特征变量建立相关模型,验证了我国A股市场发展对上市公司产业转型升级显著存在的促进作用。具体而言,股市规模增长对产业转型升级的促进作用大于股市流动性增加的作用;股市发展对高技术、创新型产业的促进作用比对于资本密集型或高附加值、高成长性行业的促进作用更为明显。

关键词：股市发展产业升级上市公司实证检验

Approaching strain limit of two-dimensional MoS_(2) via chalcogenide substitution

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Science Bulletin 2022年第1期67卷 45-53,M0004页

作者： Kailang Liu Xiang Chen Penglai Gong Ruohan Yu Jinsong Wu Liang Li wei Han Sanjun Yang Chendong Zhang Jinghao Deng Aoju Li Qingfu Zhang fuwei Zhuge Tianyou Zhai State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Nano and Heterogeneous Materials Center School of Materials Science and EngineeringNanjing University of Science and TechnologyNanjing 210094China Department of Physics Southern University of Science and TechnologyShenzhen 518055China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Nanostructure Research CenterWuhan University of TechnologyWuhan 430070China Institutes of Physical Science and Information Technology Anhui UniversityHefei 231699China School of Physics and Technology Wuhan UniversityWuhan 430072China

Strain engineering is a promising method for tuning the electronic properties of two-dimensional(2 D)materials,which are capable of sustaining enormous strain thanks to their atomic ***,applying a large and homogeneous strain on these 2D materials,including the typical semiconductor MoS_(2),remains *** we report a facile strategy for the fabrication of highly strained MoS_(2) via chalcogenide substitution reaction(CSR)of MoTe_(2) with lattice *** MoS_(2)resulting from the sulfurized MoTe_(2) sustains ultra large in-plane strain(approaching its strength limit~10%)with great ***,the strain can be deterministically and continuously tuned to~1.5%by simply varying the processing *** to the fine control of our CSR process,we demonstrate a heterostructure of strained MoS_(2)/MoTe_(2)with abrupt ***,we verify that such a large strain potentially allows the modulation of MoS_(2) bandgap over an ultra-broad range(~1 e V).Our controllable CSR strategy paves the way for the fabrication of highly strained 2D materials for applications in devices.

关键词： Strain engineering 2D materials Chalcogenide substitution Controllable strain Lattice inheritance