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隧道内非对称双火源火焰特性及顶棚烟气最高温度研究

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安全与环境学报 2025年第1期25卷 50-57页

作者：孟娜杜晓燕山东科技大学安全与环境工程学院山东青岛266590 安徽工业大学建筑工程学院安徽马鞍山243032

针对自然通风下隧道火灾非对称双火源协同作用下火焰特性和顶棚射流烟气最高温度开展研究。在缩尺寸隧道火灾模拟试验平台开展试验,结果表明,随着火源间距的增大,非对称双火源由完全融合到间歇融合,最后完全分离。火焰完全融合且火源热... 详细信息

针对自然通风下隧道火灾非对称双火源协同作用下火焰特性和顶棚射流烟气最高温度开展研究。在缩尺寸隧道火灾模拟试验平台开展试验,结果表明,随着火源间距的增大,非对称双火源由完全融合到间歇融合,最后完全分离。火焰完全融合且火源热释放速率不同时,火焰呈现非对称形态,存在一个火焰高度,火焰高度主要由较大热释放速率火源决定。随着火源间距的增大,存在两个火焰高度,火焰高度最大值均大于对应工况火焰完全融合时的火焰高度。双火源一侧接收到的辐射热流随离开火源距离的增大而减小,固定水平位置处接收到的热辐射随着火源间距的变化会有波动,但整体变化不大。非对称双火源火羽流顶棚射流烟气最高温度整体随火源间距的增大而减小。当S/D<0.5时,烟气最高温度主要受两个火源热释放速率的影响,火源间距对烟气最高温度的影响较小;而当S/D≥0.5时,烟气最高温度主要受对应侧火源热释放速率的影响,而受临近火源热释放速率的影响较小。在此基础上,建立了非对称双火源顶棚射流烟气最高温度分段预测模型。

关键词：安全工程隧道火灾非对称双火源火焰形态火焰高度热辐射烟气最高温度

Synthesis and characterization of bifunctional terbium complex-based nanoparticles

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Chinese Science Bulletin 2012年第7期57卷 750-755页

作者： RuiHua Lu Jiang He LiZhen Huang Xia Ge xiaoyan du Jie Zhu Lanzhou Univ State Key Lab Appl Organ Chem Lanzhou 730000 Peoples R China

Novel bifunctional terbium complex-based nanoparticles were developed using a modified Stber method and a layer-by-layer assembly process. A magnetic core of Fe3O4 nanoparticles was coated with a silica shell to form the first layer. Then a ternary Tb3+ complex (TESPPA-Tb), which acted as a luminescent marker, was covalently bound to the silica surface by stable Si-O-Si bonds. The TESPPA monomer was synthesized by binding pyridine 2,6-dicarboxylic acid to 3-aminopropyltriethoxysilane, which was used as a ligand for coordination with the Tb3+ ions. An outer shell of silica was applied to the nanoparticles to allow for versatility with surface functionalization. The nanoparticles were characterized by X-ray powder diffraction, transmission electron microscopy, Fourier transform infrared spectroscopy, ultravioletvisible spectroscopy, vibration sample magnetometer, and photoluminescence spectroscopy. The bifunctional nanoparticles exhibited favorable superparamagnetic behavior and photoluminescence properties of Tb3+. These nanoparticles have potential applications in biolabeling, bioseparation, immunoassays, and pathogenic diagnosis.

关键词：纳米粒子铽离子双功能傅立叶变换红外光谱表征合成 X-射线粉末衍射透射电子显微镜

High frequency performance of nano-scale ultra-thin-body Schottky-barrier n-MOSFETs

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Science China(Information Sciences) 2011年第8期54卷 1756-1761页

作者： du Gang,LIU xiaoyan & HAN RuQi Institute of Microelectronics,Peking University,Beijing 100871,China Institute of Microelectronics Peking University Beijing China

The high frequency performances of nano-scale ultra-thin-body (UTB) Schottky-barrier n-MOSFETs (SB-nMOSFETs) are investigated using 2D full-band self-consistent ensemble Monte Carlo method. The UTB SB-nMOSFET devices offer excellent RF performance with high values of f T and f *** significant dependence of f T and f max on gate voltage and weak dependence on barrier height are ***,the significant dependence of g m and g ds on both gate voltage and SB height are shown. Moreover,the scalability of f T is outstanding and close to the ideal case (f T ∝ 1/L2g ). The high frequency performances of 45 nm channel length SB-nMOSFETs at ballistic transport limit are also investigated. Results show that scattering strongly affects the capacitances C gs,C gd and C *** ballistic transport limit the f T and f max are almost 10 times *** Scattering effects in nano-scale SB-nMOSFETs cannot be neglected.

关键词： Monte Carlo ultra thin body (UTB) Schottky-barrier MOSFETs (SB-MOSFETs) high frequency

Effects of adaptation to handling on the circadian rhythmicity of blood solutes in Mongolian gerbils

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Animal Models and Experimental Medicine 2019年第2期2卷 127-131页

作者： Xingchen Liu Xiang Zheng Yihan Liu xiaoyan du Zhenwen Chen School of Basic Medical Science Capital Medical University Beijing China Department of Laboratory Animal Capital Medical University Beijing China

The Mongolian gerbil has been widely used in many research fields and has been reported to be a diurnal laboratory animal. The circadian rhythmicity of these gerbils was investigated in the present study by measuring two hormones that show daily oscillations, cortisol and ACTH, in serum using ELISA kits. The levels of the two hormones were highest at 8:00 am and their rhythmic changes were similar to those in humans. In addition, the influence of stress of handling and blood collection on the physiological parameters of the gerbils was examined. After adaptation to handling for 1 week, some serum parameters in the animals changed. Handling and blood collection did not impact significantly on the following parameters: creatine kinase (CK), lactate dehydrogenase (LD), alanine aminotransferase (ALT), aspartate transaminase (AST), blood urea nitrogen (BUN), and albumin (ALB). However, blood glucose (GLU), total protein (TP) and globulin (GLB) significantly increased while creatinine (CRE) and albumin/globulin (A/G) significantly decreased after adaptation. This work further confirms that the Mongolian gerbil is a diurnal animal and also indicates that a suitable adaptation procedure is necessary for getting reliable results when performing experiments using these animals.

关键词： circadian rhythmicity diurnal animals handling adaptation Mongolian gerbils physiological parameters stress

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氧化钕暴露致小鼠脑组织损伤的机制研究

实用医学杂志 2025年第1期41卷 30-34页

作者：吴俐虹郭燕曹静杜晓燕梁青青高晓诚王艳茹邓洋高龙内蒙古科技大学包头医学院内蒙古包头014040 包头海关内蒙古包头014040

目的采用非暴露式气管滴注建立不同剂量氧化钕暴露小鼠模型,研究氧化钕暴露致小鼠脑组织损伤的机制。方法将48只雄性C57/BL6小鼠随机分为四组:对照组、低剂量组、中剂量组、高剂量组。低剂量组、中剂量组、高剂量组分别采用非暴露式气... 详细信息

目的采用非暴露式气管滴注建立不同剂量氧化钕暴露小鼠模型,研究氧化钕暴露致小鼠脑组织损伤的机制。方法将48只雄性C57/BL6小鼠随机分为四组:对照组、低剂量组、中剂量组、高剂量组。低剂量组、中剂量组、高剂量组分别采用非暴露式气管滴注62.5、125、250 mg/mL氧化钕,对照组采用相同给药方式给予等体积生理盐水,35 d后处死小鼠取脑组织。应用RT-PCR检测Claudin-5、Occludin的m RNA表达变化,应用Western blot检测脑组织中Claudin-5、Occludin紧密连接蛋白的表达变化以及MMP-2、MMP-9的表达变化,检测RhoA/ROCK2信号通路及下游cofilin蛋白的表达,试剂盒法检测MDA、T-AOC、NO氧化应激指标的变化。结果中剂量组和高剂量组Claudin-5的mRNA表达较对照组降低(P<0.05);低剂量组、中剂量组、高剂量组Occludin的mRNA表达较对照组降低(P<0.05);低剂量组、中剂量组、高剂量组Claudin-5、MMP-2、Occludin的蛋白表达较对照组降低(P<0.05);中剂量组和高剂量组MMP-9、RhoA的蛋白表达较对照组降低(P<0.05);高剂量组ROCK2、p-cofilin的蛋白表达较对照组降低(P<0.05);中剂量组和高剂量组MDA含量较对照组升高(P<0.05);中剂量组和高剂量组T-AOC含量较对照组降低(P<0.05);高剂量组NO含量较对照组升高(P<0.05)。结论氧化钕暴露导致小鼠血脑屏障通透性增加,引起氧化应激和炎症反应,激活RhoA/ROCK2信号通路。

关键词：氧化钕血脑屏障氧化应激信号通路

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微冻胀填料中填充料冻胀与骨架颗粒的相互作用机制

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中国铁道科学 2017年第6期38卷 9-15页

作者：杜晓燕中国铁道科学研究院高速铁路轨道技术国家重点实验室北京100081

针对季节性冻土地区路基冻胀对高速铁路平顺性影响的问题,运用室内试验与理论分析相结合的方法,研究填充料、含水率及外荷载等因素对微冻胀填料冻胀的影响,并分析冻胀过程中填充料与骨架颗粒之间的相互作用机制。结果表明:微冻胀填料由... 详细信息

针对季节性冻土地区路基冻胀对高速铁路平顺性影响的问题,运用室内试验与理论分析相结合的方法,研究填充料、含水率及外荷载等因素对微冻胀填料冻胀的影响,并分析冻胀过程中填充料与骨架颗粒之间的相互作用机制。结果表明:微冻胀填料由粗粒骨架、骨架颗粒之间的填充料及未填充的剩余孔隙组成;当填充料填充率为0.25时,填料发生初始宏观冻胀;上覆荷载具有抑制填料冻胀的作用;冻结过程中刚度较大骨架粗颗粒的体积基本不发生变化,而填充料体积发生膨胀起到填充骨架颗粒间剩余孔隙和抬升骨架颗粒的作用,引起宏观冻胀;当骨架颗粒间的剩余孔隙率较大时消纳作用强,同时削减了抬升作用,而抬升作用使骨架颗粒间的间隙增大,从而又促进了填充料填充作用的发展;当骨架结构稳定时,填充料的填充作用明显;微冻胀填料的冻胀过程实际上是填充料的填充作用与抬升作用的动态平衡过程。

关键词：冻土路基季节性冻土微冻胀填料骨架颗粒填充料冻胀机理

Instability of microsatellites linked to targeted genes inCRISPR/Cas9-edited and traditional gene knockout mouse strains

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Journal of Genetics and Genomics 2018年第10期45卷 553-556页

作者： Xueyun Huo Xiulin Zhang Yihan Liu Yizhu Sun Yu Ren Changlong Li xiaoyan du Zhenw en Chen School of Basic Medical Sciences Capital Medical UniversiryBeijing Key Laboratory of Cancer Invasion&Metastasis ResearchBeijing 100069China

The classic method for gene knockout (KO) is based on homologous recombination (HR) and embryonic stem cell technique (Gerlai,1996).Actually,the procedure of homologous replacement is complicated and time consuming,although it has been popular during the past *** years,genome editing which can cause DNA sequence-specific mutations in the genomes of cellular

关键词： MSI KO Instability of microsatellites linked to targeted genes in CRISPR/Cas9-edited and traditional gene knockout mouse strains

Analysis on the Impacts of Precise Poverty Alleviation on Folk Customs and Control Measures

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Asian Agricultural Research 2019年第1期11卷 10-13页

作者： Xuetao LI xiaoyan du College of Economics and Management Hubei University of Automotive Technology

The promotion of precise poverty alleviation in poverty-stricken areas will inevitably lead to changes in local folk *** economic development may bring about greater development of folk customs,and may also lead to qualitative changes in folk *** paper mainly introduced the impact of the precise poverty alleviation on the folk *** on the analysis,it came up with pertinent control measures,to better combine the folk customs with precise poverty alleviation measures,to promote common development of economy and culture in poverty stricken areas.

关键词： Precise poverty alleviation Folk customs Impact Control measures

4‑Terminal Inorganic Perovskite/Organic Tandem Solar Cells Offer 22%Efficiency

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Nano-Micro Letters 2023年第2期15卷 172-181页

作者： Ling Liu Hanrui Xiao Ke Jin Zuo Xiao xiaoyan du Keyou Yan Feng Hao Qinye Bao Chenyi Yi Fangyang Liu Wentao Wang Chuantian Zuo Liming Ding Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190People’s Republic of China School of Metallurgy and Environment Central South UniversityChangsha 410083People’s Republic of China School of Physics State Key Laboratory of Crystal MaterialsShandong UniversityJinan 250100People’s Republic of China School of Environment and Energy South China University of TechnologyGuangzhou 510000People’s Republic of China School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 610054People’s Republic of China School of Physics and Electronic Science East China Normal UniversityShanghai 200241People’s Republic of China State Key Laboratory of Power System Department of Electrical EngineeringTsinghua UniversityBeijing 100084People’s Republic of China School of Materials Science and Engineering Zhejiang Sci-Tech UniversityHangzhou 310018People’s Republic of China Key Laboratory of Semiconductor Materials Science Beijing Key Laboratory of Low Dimensional Semiconductor Materials and DevicesInstitute of SemiconductorsChinese Academy of SciencesBeijing 100083People’s Republic of China

After fast developing of single-junction perovskite solar cells and organic solar cells in the past 10 years,it is becoming harder and harder to improve their power conversion *** solar cells are receiving more and more attention because they have much higher theoretical efficiency than single-junction solar *** device performance has been achieved for perovskite/silicon and perovskite/perovskite tandem solar cells,including 2-terminal and 4-terminal ***,very few studies have been done about 4-terminal inorganic perovskite/organic tandem solar *** this work,semi-transparent inorganic perovskite solar cells and organic solar cells are used to fabricate 4-terminal inorganic perovskite/organic tandem solar cells,achieving a power conversion efficiency of 21.25%for the tandem cells with spin-coated perovskite *** using drop-coating instead of spin-coating to make the inorganic perovskite films,4-terminal tandem cells with an efficiency of 22.34%are *** efficiency is higher than the reported 2-terminal and 4-terminal inorganic perovskite/organic tandem solar *** addition,equivalent 2-terminal tandem solar cells were fabricated by connecting the sub-cells in *** stability of organic solar cells under continuous illumination is improved by using semi-transparent perovskite solar cells as filter.

关键词： 4-Terminal tandem solar cells Inorganic perovskite solar cells Organic solar cells Semitransparent Drop-coating