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Prevention of urinary tract infection using a silver alloy hydrogel-coated catheter in critically ill patients: A single-center prospective randomized controlled study

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Journal of Intensive Medicine 2024年第1期4卷 118-124页

作者： Menglong Zhao Shike Geng lei Zhang Xiaoqin Fan Fei tong Xianlin Meng Tianfeng Wang Xiaowei Fang Qing Mei Aijun Pan Department of Intensive Care Unit The First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefei 230001AnhuiChina

Background:A new type of silver alloy hydrogel-coated(SAH)catheter has been shown to prevent bacterial adhesion and colonization by generating a microcurrent,and to block the retrograde infection ***,these have only been confirmed in ordinary *** study aims to evaluate the effectiveness of a SAH catheter for preventing urinary tract infections in critically ill ***:This was a prospective single-center,single-blind,randomized,controlled study.A total of 132 patients requiring indwelling catheterization in the intensive care unit(ICU)of the First Affiliated Hospital of the University of Science and Technology of China between October 2022 and February 2023 and who met the study inclusion/exclusion criteria were randomly divided into two *** in the SAH catheter group received a SAH catheter,while patients in the conventional catheter group received a conventional siliconized latex Foley *** main outcome measure was the incidence of catheter-associated urinary tract infections(CAUTIs).Secondary outcome indicators included urine positivity for white blood cells and positive urine cultures on 3 days,7 days,10 days,and 14 days after catheterization,number of viable bacteria in the catheter biofilm on day 14,pathogenic characteristics of positive urine cultures,length of ICU stay,overall hospital stay,ICU mortality,and 28-day *** the data were compared between the two ***:A total of 68 patients in the conventional catheter group and 64 patients in the SAH catheter group were included in the *** day 7 after catheter placement,the positivity rate for urinary white blood cells was significantly higher in the conventional catheter group than in the SAH catheter group(33.8%vs.15.6%,P=0.016).On day 10,the rates of positive urine cultures(27.9%vs.10.9%,P=0.014)and CAUTIs(22.1%vs.7.8%,P=0.023)were significantly higher in the conventional catheter group than in the SAH catheter *** day 14,the numb

关键词： Catheter coating Effectiveness evaluation Biofilm Catheter-associated urinary tract infection Outcome

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Pulsar timing residuals due to individual non-evolving gravitational wave sources

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Research in Astronomy and Astrophysics 2014年第4期14卷 390-400页

作者： Ming-lei tong Cheng-Shi Zhao Bao-Rong Yan Ting-Gao Yang Yu-Ping Gao National Time Service Center Chinese Academy of Sciences Key Laboratory of Time and Frequency Primary Standards Chinese Academy of Sciences Key Laboratory of Precision Navigation and Timing Technology Chinese Academy of Sciences

The pulsar timing residuals induced by gravitational waves from non- evolving single binary sources are affected by many parameters related to the relative positions of the pulsar and the gravitational wave sources. We will analyze the various effects due to different parameters. The standard deviations of the timing residuals will be calculated with a variable parameter fixing a set of other parameters. The or- bits of the binary sources will be generally assumed to be elliptical. The influences of different eccentricities on the pulsar timing residuals will also be studied in detail. We find that the effects of the related parameters are quite different, and some of them display certain regularities.

关键词： gravitational waves: general -- pulsars: general -- binaries: general

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Beyond 600G fiber-THz wireless seamless integration system employing cascaded MIMO equalizers

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Science China(Technological Sciences) 2024年第7期67卷 2274-2276页

作者： DING JunJie tong WeiDong LI Xintong ZHANG Zheng ZHANG Jiao CAI YuanCheng lei MingZheng HUA BingChang CHEN XingYu YU JianJun ZHU Min Purple Mountain Laboratories Nanjing 211111China National Mobile Communications Research Laboratory Southeast UniversityNanjing 210096China Fudan University Shanghai 200433China

Terahertz(THz)-wave communication, with sufficient spectrum resources(0.3 THz~10 THz), can meet the needs of future 6G large-capacity mobile communication services[1-9]. Recently, the seamless integration of existing ... 详细信息

关键词： communication fiber wireless

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协同集聚外部性与产业升级互动关系研究——基于制造业与生产性服务业的PVAR分析

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科技进步与对策 2023年第16期40卷 96-107页

作者：童磊荣亚飞中国矿业大学(北京)管理学院北京100083

为廓清制造业和生产性服务业协同集聚外部性(专业化外部性、多样化外部性)与产业升级之间的关系,基于2006—2019年中国省际面板数据,运用PVAR模型,对三者之间的关系进行探究。结果表明,不同协同集聚外部性存在差异,专业化外部性较多样... 详细信息

为廓清制造业和生产性服务业协同集聚外部性(专业化外部性、多样化外部性)与产业升级之间的关系,基于2006—2019年中国省际面板数据,运用PVAR模型,对三者之间的关系进行探究。结果表明,不同协同集聚外部性存在差异,专业化外部性较多样化外部性更能促进产业升级,二者之间存在相互促进机制;多样化外部性与产业升级表现为促进和抑制并存的交互作用,短期内虽表现为促进作用,但随着时间推移,抑制作用会逐渐显现;协同集聚外部性与产业升级之间的动态互动关系具有区域异质性,专业化外部性与产业升级仅在东部地区表现为促进和抑制并存的交互关系,多样化外部性与产业升级在东西部地区表现为相互促进的交互关系,中部地区协同集聚与产业升级之间尚未形成良性互动。

关键词：产业协同集聚专业化外部性多样化外部性 PVAR 产业升级

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培育国际化新工科高端人才教学模式的探索与实践

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实验室研究与探索 2023年第12期42卷 218-222,257页

作者：童蕾丁显廷上海交通大学生物医学工程学院个性化医学研究院上海200030

依托于上海交通大学全球无边界课堂(iPodia)《全球化创新:原理与实践》课程,通过校企合作,将企业自身经营中遇到的实际问题和困难直接反转抛给全球无边界课堂,让全球学生们针对实际问题深入开展多样化的探索实践,最终形成可推广的建设... 详细信息

依托于上海交通大学全球无边界课堂(iPodia)《全球化创新:原理与实践》课程,通过校企合作,将企业自身经营中遇到的实际问题和困难直接反转抛给全球无边界课堂,让全球学生们针对实际问题深入开展多样化的探索实践,最终形成可推广的建设经验和教学改革成果。旨在创新性地探索面向当今国际形式,如何利用先进的多媒体教学手段,保持我国大学生教育的国际化和与世界纽带关系的持续深化教育模式。

关键词：国际化新工科教学模式校企合作

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Room-temperature infrared photodetectors with hybrid structure based on two-dimensional materials

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Chinese Physics B 2019年第1期28卷 82-100页

作者：刘天德童磊黄鑫宇叶镭 School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China

Two-dimensional(2D) materials, such as graphene, transition metal dichalcogenides(TMDs), black phosphorus(BP),and related derivatives, have attracted great attention due to their advantages of flexibility, strong light–matter interaction,broadband absorption, and high carrier mobility, and have become a powerful contender for next-generation infrared photodetectors. However, since the thickness of 2D materials is on the order of nanometers, the absorption of 2D materials is very weak, which limits the detection performance of 2D materials-based infrared photodetectors. In order to solve this problem, scientific researchers have tried to use optimized device structures to combine with 2D materials for improving the performance of infrared photodetectors. In this review, we review the progress of room-temperature infrared photodetectors with hybrid structure based on 2D materials in recent years, focusing mainly on 2D–nD(n = 0, 1, 2) heterostructures, the integration between 2D materials and on-chip or plasmonic structure. Finally, we summarize the current challenges and point out the future development direction.

关键词： two-dimensional materials heterostructure infrared photodetectors

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Preparation of Three Dimensional Hydroxyapatite Nanoparticles/Poly(vinylidene fluoride) Blend Membranes with Excellent Dye Removal Efficiency and Investigation of Adsorption Mechanism

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Chinese Journal of Polymer Science 2019年第12期37卷 1234-1247,I0006页

作者： Jian-Hua Li Hui Zheng Hua-Xiang Lin Bo-Xin Zhang Jia-Bin Wang tong-lei Li Qi-Qing Zhang Institute of Biomedical and Pharmaceutical Technology Fuzhou UniversityFuzhou 350001China State Key Laboratory of Photocatalysis on Energy and Environment Fuzhou UniversityFuzhou 350116China Department of Industrial and Physical Pharmacy Purdue University575 Stadium Mall DriveWest LafayetteIN 47906USA

In this work,poly(vinylidene fluoride)(PVDF)membranes with hydrophilicity as well as preeminent mechanical strength and dye removal efficiency were fabricated by blending with three dimensional hydroxyapatite nanoparticles(HAPNPs).Surface chemical composition and morphology of the prepared membranes were systematically investigated by ATR-FTIR,XPS,XRD,FESEM,and EDS mapping *** results verified that a large number of HAPNPs were successfully embedded on the modified membrane ***,HAPNPs content in the casting solution is an important factor that could have profound influence on the structures and performances of PVDF/HAPNPs blend *** optimal membrane M2 with 2 wt%HAPNPs exhibited excellent hydrophilicity,outstanding mechanical strength of 19.60 MPa,and high water flux of(2466±31)L·m^2·h^-*** maximum static adsorption capacity of the optimal membrane was about 10.83 mg/g,which is 3.75 times that of the pristine PVDF membrane(2.89 mg/g).PVDF/HAPNPs membranes were not only utilized for static adsorption,but also applied to dynamic dye *** possible adsorption mechanism between Congo red(CR)and HAPNPs embedded on the blend membranes was firstly discussed in this *** interacted with CR via Lewis reaction,hydrogen bond interaction,as well as electrostatic attraction to achieve the adsorption ***,the PVDF/HAPNPs blend membranes with extraordinary hydrophilicity,mechanical strength,and dye removal efficiency possess tremendous potential for practical applications of wastewater treatment.

关键词： Three dimensional hydroxyapatite nanoparticles PVDF/HAPNPs blend membranes Mechanical strength Dynamic dye removal Adsorption mechanism

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液体火箭发动机尾焰金属发射光谱仿真与实验研究

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推进技术 2024年第2期45卷 105-113页

作者：苏童雷庆春范玮西北工业大学动力与能源学院陕西西安710072

液体火箭发动机尾焰包含丰富的光谱信息,可以作为检测发动机运行状态与故障情况的重要依据。本文建立了高精度的液体火箭发动机尾焰金属发射光谱数值模拟方法,该方法以逐线法(Line-by-Line,LBL)为基础,考虑介质的光学厚度影响。利用该方... 详细信息

液体火箭发动机尾焰包含丰富的光谱信息,可以作为检测发动机运行状态与故障情况的重要依据。本文建立了高精度的液体火箭发动机尾焰金属发射光谱数值模拟方法,该方法以逐线法(Line-by-Line,LBL)为基础,考虑介质的光学厚度影响。利用该方法,对液体火箭发动机发生故障时,尾焰中可能存在的铁、镍、钾发射光谱进行了数值模拟,模拟结果与NASA光谱模拟程序所得结果相吻合。最后,在甲烷-氧气、乙烯-氧气预混火焰开展了铁、钾发射光谱的实验验证,结果表明,以光谱面积与特征峰强度为对比参数,光谱模拟结果和实验结果的相对误差在2.5%以下,利用实验数据,进一步讨论了光学薄和光学厚两种模型的适用性。

关键词：液体火箭发动机原子发射光谱数值模拟光学厚度逐线法

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Unexpected divergence in magnetoreceptor MagR from robin and pigeon linked to two sequence variations

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Zoological Research 2024年第1期45卷 69-78页

作者： Shun Wang Peng Zhang Fan Fei Tianyang tong Xiujuan Zhou Yajie Zhou Jing Zhang Mengke Wei Yanqi Zhang lei Zhang Yulong Huang Lin Zhang Xin Zhang Tiantian Cai Can Xie Institutes of Physical Science and Information Technology Anhui UniversityHefeiAnhui 230039China High Magnetic Field Laboratory Hefei Institutes of Physical ScienceChinese Academy of SciencesScience IslandHefeiAnhui 230031China Science Island Branch of Graduate School University of Science and Technology of ChinaHefeiAnhui 230036China Department of Anatomy Anhui Medical UniversityHefeiAnhui 230032China Department of Mechanical and Aerospace Engineering University at BuffaloState University of New YorkBuffaloNY 14260 USA International Magnetobiology Frontier Research Center Science IslandHefeiAnhui 230031China

Birds exhibit extraordinary mobility and remarkable navigational skills,obtaining guidance cues from the Earth’s magnetic field for orientation and long-distance *** species also show tremendous diversity in navigation strategies,with considerable differences even within the same taxa and among individuals from the same *** highly conserved iron and iron-sulfur cluster binding magnetoreceptor(MagR)protein is suggested to enable animals,including birds,to detect the geomagnetic field and navigate ***,MagR is also implicated in other functions,such as electron transfer and biogenesis of iron-sulfur clusters,raising the question of whether variability exists in its biochemical and biophysical features among species,particularly *** the current study,we conducted a comparative analysis of MagR from two different bird species,including the migratory European robin(Erithacus rubecula)and the homing pigeon(Columba livia).Sequence alignment revealed an extremely high degree of similarity between the MagRs of these species,with only three sequence ***,two of these variations underpinned significant differences in metal binding capacity,oligomeric state,and magnetic *** findings offer compelling evidence for the marked differences in MagR between the two avian species,potentially explaining how a highly conserved protein can mediate such diverse functions.

关键词： Homing and migration Animal navigation Magnetoreceptor(MagR) Diverse navigation pattern Conserved protein

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碳排放环境库兹涅茨曲线及其影响因素——基于2008年中国103个地级市的截面分析

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应用基础与工程科学学报 2012年第S1期20卷 119-125页

作者：童昕童磊北京大学城市与环境学院北京100871

基于中国103个地级市2008年截面数据,得出人均碳排放水平在同一年份不同经济发展水平的城市尺度上存在环境库兹涅茨曲线的变化规律,也就是人均碳排放水平随城市的人均GDP水平升高而升高,达到一定峰值后,出现人均GDP水平提高,而人均碳排... 详细信息

基于中国103个地级市2008年截面数据,得出人均碳排放水平在同一年份不同经济发展水平的城市尺度上存在环境库兹涅茨曲线的变化规律,也就是人均碳排放水平随城市的人均GDP水平升高而升高,达到一定峰值后,出现人均GDP水平提高,而人均碳排放水平下降的现象.由于采用地级市尺度的截面数据,城市区位条件的差异可能会对人均碳排放水平产生重要影响.为此,本文基于IPAT假设,在前人研究的基础上,不仅考虑经济发展水平及技术水平等因素,还着重考察了不同地理因素对其的影响,结果表明所考察的103个地级市中,北方采暖区和东西经济发展梯度对地级市水平的人均碳排放具有显著影响.由此,提出借鉴国际间的联合履约机制,在我国结合地域特点设计跨区域的碳排放联合减排方案.

关键词：碳排放环境库兹涅茨曲线地理因素减碳对策

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