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Journal of Energy Chemistry 2024年第5期92卷 233-239页

作者： chongchong liu Peifang Wang Bin Hu Xiaoli liu Rong Huang Gang Zhou Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education College of EnvironmentHohai UniversityNanjing 210098JiangsuChina

Urea oxidation reaction(UOR)is proposed as an exemplary half-reaction in renewable energy applications because of its low thermodynamical ***,challenges persist due to sluggish reaction kinetics and complex by-products *** this end,we introduce the lattice oxygen oxidation mechanism(LOM),propelling a novel UOR route using a modified CoFe layered double hydroxide(LDH)catalyst termed *** calculations and in-situ characterizations highlight the activated lattice oxygen(O_(L))within CFRO-7 as pivotal sites for UOR,optimizing the reaction pathway and accelerating the *** the urea overall electrolysis application,the LOM route only requires a low voltage of 1.54 V to offer a high current of 100 mA cm^(-2) for long-term utilization(>48 h).Importantly,the by-product NCO^(-)−is significantly suppressed,while the CO_(2)2/N_(2) separation is efficiently *** work proposed a pioneering paradigm,invoking the LOM pathway in urea electrolysis to expedite reaction dynamics and enhance product selectivity.

关键词： Lattice oxygen Urea oxidation reaction Overall electrolysis Products selectivity

基于改进YOLOV4-tiny的电力设备红外识别研究

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现代机械 2024年第1期 83-87页

作者：刘冲冲张力平任锦飞陈群元长安大学工程机械学院陕西西安710064 长安大学公路养护装备国家工程实验室陕西西安710068 不详

红外检测技术因其具有无需直接接触、带电状态进行检测、检测快速等优点,广泛应用于电力设备过热故障诊断领域。但是,红外图像质量不佳和电力设备的复杂分布等问题,对电力设备故障红外检测过程中的电力设备种类检测精度带来不利影响。... 详细信息

红外检测技术因其具有无需直接接触、带电状态进行检测、检测快速等优点,广泛应用于电力设备过热故障诊断领域。但是,红外图像质量不佳和电力设备的复杂分布等问题,对电力设备故障红外检测过程中的电力设备种类检测精度带来不利影响。为了实现电力设备种类识别的快速准确检测,在YOLOV4-tiny目标检测算法的基础上,提出了适用于电力设备过热故障诊断过程设备种类识别的YOLOV4-tiny目标检测模型。通过旋转矩形框机制替换水平矩形框机制、改进激活函数和采用PAN+FPN加强特征提取网络的方式,来改进原检测模型,使其在检测时更精准更快速。通过多次实验验证,优化后的模型相较于YOLOV4、YOLOV4-tiny两种模型来说,检测速度没有明显提升,但其检测精度提升了1.89%,这为电力设备过热故障红外诊断过程中的设备种类识别研究带来了新的思路。

关键词：红外检测带电检测旋转矩形 YOLOV4-tiny

吸气肌训练对支气管哮喘患者肺功能影响的Meta分析

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中国康复 2024年第2期39卷 105-110页

作者：游煌俊刘冲冲孙伟铭陈招君帅浪南昌大学第一附属医院康复医学科南昌330006 南昌大学南昌330031

目的:系统评价吸气肌训练对支气管哮喘(哮喘)患者肺功能的影响。方法:计算机检索PubMed、Cochrane Library、EMBASE、中国知网(CNKI)、万方数据知识服务平台(Wanfang Data)、维普网(VIP)等数据库,查找自建库至2023年7月关于吸气肌训练... 详细信息

目的:系统评价吸气肌训练对支气管哮喘(哮喘)患者肺功能的影响。方法:计算机检索PubMed、Cochrane Library、EMBASE、中国知网(CNKI)、万方数据知识服务平台(Wanfang Data)、维普网(VIP)等数据库,查找自建库至2023年7月关于吸气肌训练对哮喘患者肺功能影响的随机对照试验。两名研究人员独立筛选文献、提取资料,按照Cochrane手册评价纳入文献的偏倚风险,然后采用RevMan 5.3软件进行Meta分析。结果:共纳入7篇文献,包括229例受试者。Meta分析结果显示:与对照组相比,吸气肌训练能有效地改善用力肺活量占预计值百分比[MD=10.86,95%CI(4.34,17.38),P=0.001]、呼气峰流速[MD=98.47,95%CI(71.76,125.19),P<0.00001]、和最大呼气压[MD=21.67,95%CI(5.50,37.85),P=0.0009],但对第一秒用力呼气容积占预计值百分比[MD=4.51,95%CI(-3.55,12.56),P=0.27]、一秒率[MD=-2.70,95%CI(-18.71,13.30),P=0.74]的改善情况与对照组相比,差异无统计学意义。干预时长大于8周的吸气肌训练组最大吸气压显著高于对照组[MD=16.25,95%CI(5.62,26.88),P=0.003];干预时长小于8周,2组间差异无统计学意义[MD=36.51,95%CI(-0.62,73.64),P=0.05]。结论:吸气肌训练能有效改善哮喘患者的呼吸肌肌力,且对肺通气功能部分指标有明显提高。

关键词：吸气肌训练支气管哮喘肺功能荟萃分析

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变电站内设备小电流接地的分析及处理

电工技术 2024年第10期 208-210,214页

作者：林亮刘冲冲王小祥季星癸邬建民吴越涛国网江苏省电力有限公司太仓市供电分公司江苏太仓215400 国网江苏省电力有限公司苏州供电分公司江苏苏州215004

小电流接地是35 kV及以下电压等级配电网常见的故障类型,通常发生于线路设备。变电站内设备发生小电流接地故障的情况非常少见,容易被配网调控员和变电站值班员忽视,但其对电网造成的影响远大于线路设备小电流接地。为此,介绍了小电流... 详细信息

小电流接地是35 kV及以下电压等级配电网常见的故障类型,通常发生于线路设备。变电站内设备发生小电流接地故障的情况非常少见,容易被配网调控员和变电站值班员忽视,但其对电网造成的影响远大于线路设备小电流接地。为此,介绍了小电流接地的现象和处理流程,并通过分析一起变电站内设备小电流接地故障的事故情况和处理过程,提出针对变电站内设备小电流接地故障的处理要点和注意事项。

关键词：配电网小接地电流系统小电流接地站内设备

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飞机起落架系统摆振动力学研究进展

航空学报 2022年第6期43卷 99-114页

作者：刘小川刘冲冲牟让科中国飞机强度研究所西安710065 结构冲击动力学航空科技重点实验室西安710065 陕西省飞行器振动冲击与噪声重点实验室西安710065

摆振是起落架支柱侧向运动与围绕支柱的扭转运动相互耦合产生的自激振动,对飞机地面滑行的操纵性与安全性等具有很大的危害,是起落架系统设计中重点关注的动力学问题之一。摆振主要有“轮胎型”和“结构型”2类,可以采用动力学理论建模... 详细信息

摆振是起落架支柱侧向运动与围绕支柱的扭转运动相互耦合产生的自激振动,对飞机地面滑行的操纵性与安全性等具有很大的危害,是起落架系统设计中重点关注的动力学问题之一。摆振主要有“轮胎型”和“结构型”2类,可以采用动力学理论建模、多体动力学数值分析与全尺寸物理试验等方法对起落架系统的摆振特性进行研究,已发展了线性与非线性理论建模方法和数值工具,建立起了起落架摆振试验系统,也开展了全机瞬态激励下的滑跑稳定性试验。为防止摆振问题的产生,在认识摆振机理的基础上,研究者广泛而又深入地研究了起落架设计参数、轮胎参数、机体特性等对滑跑动响应与稳定性的影响,在获得各种设计参数对起落架摆振稳定性影响的基础上,发展了摆振动力学优化设计方法和智能器件与半主动/主动控制的摆振抑制方法,并开展了试验验证或装机演示验证。结合未来飞机平台的发展和起落架技术的创新,对起落架摆振动力学问题的未来发展方向进行了展望。

关键词：飞机滑跑起落架摆振减摆器摆振抑制

Statistical characteristics of spray autoignition of transient kerosene jet in cross flow

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Chinese Journal of Aeronautics 2021年第12期34卷 73-84页

作者： Chi ZHANG Chunlong HE Xin XUE Yuzhen LIN Jibao LI chongchong liu National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics Research Institute of Aero-EngineBeihang UniversityBeijing 100083China AECC Commercial Aircraft Engine Co. Ltd.Shanghai 200241China

To study statistical characteristics of the random spray autoignition,aviation kerosene was injected transiently into non-vitiated air crossflow in a flow reactor with optical *** operating conditions were relevant to gas turbine combustor:the air crossflow pressure and temperature were in the range of 1.4-1.7 MPa and 830-947 K,respectively,and the jet-tocrossflow momentum flux ratios were 20,50 and *** distributions of random ignition delay times with adequate convergence were estimated based on *** dependences of the distributions on reactor pressure,temperature,and jet-to-crossflow momentum flux ratio were *** results show that the resulting distributions appear more concentrated with the increase of air temperature or jet-to-crossflow momentum flux *** then the correlations for the mean and standard deviation of the ignition delay time sample data were developed based on the present *** with the correlations of ignition delay time of homogeneous premixed gas-phase kerosene/air mixture reported in the literature,the results show a greater significance pressure dependence and lower temperature sensitivity of the ignition delay time of nonpremixed kerosene spray.

关键词： Crossflow Flow reactor Ignition delay time Probability density Spray autoignition Transient injection

Unraveling the coordination behavior and transformation mechanism of Cr^(3+) in Fe–Cr redox flow battery electrolytes

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Materials Reports(Energy) 2024年第2期4卷 54-63页

作者： Xiaojun Zhao Xinwei Niu Xinyuan liu chongchong Wu Xinyu Duan Zhiqi Ma Yan Xu Hao Li Weijie Yang Department of Electrical Engineering North China Electric Power UniversityBaoding071003PR China Department of Energy Power and Mechanical Engineering North China Electric Power UniversityBaoding071003PR China CNOOC Institute of Chemicals&Advanced Materials Beijing102200PR China Shanghai LongVault Energy Technology Co. Ltd.Shanghai201615PR China Advanced Institute for Materials Research(WPI-AIMR) Tohoku UniversitySendai980-8577Japan

Currently,the iron chromium redox flow battery(ICRFB)has become a research hotspot in the energy storage field owing to its low cost and ***,the activity of electrolyte is still ambiguous due to its complicated solution ***,we performed a pioneering investigation on the coordination behavior and transformation mechanism of Cr^(3+)in electrolyte and prediction of impurity ions impact through quantum chemistry *** on the structure and symmetry of electrostatic potential distribution,the activity of different Cr^(3+)complex ions is confirmed as[Cr(H2O)5Cl]^(2+)>[Cr(H2O)4Cl2]+>[Cr(H2O)6]^(3+).The transformation mechanism between[Cr(H2O)6]^(3+)and[Cr(H2O)5Cl]^(2+)is *** find the metal impurity ions(especially Mg^(2+))can exacerbate the electrolyte deactivation by reducing the transformation energy barrier from[Cr(H2O)5Cl]^(2+)(24.38 kcal mol^(−1))to[Cr(H2O)6]^(3+)(16.23 kcal mol^(−1)).The solvent radial distribution and mean square displacement in different solvent environments are discussed and we conclude that the coordination configuration limits the diffusivity of Cr^(3+).This work provides new insights into the activity of electrolyte,laying a fundamental sense for the electrolyte in ICRFB.

关键词： Fe-Cr redox flow battery Coordination Electrolyte Quantum chemistry computation

Biogenic synthesis of silver nanoparticles using ginger(Zingiber officinale)extract and their antibacterial properties against aquatic pathogens

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Acta Oceanologica Sinica 2017年第12期36卷 95-100页

作者： YANG Nan LI Fuyan JIAN Tiancai liu chongchong SUN Hushan WANG Lei XU Hui School of Life Sciences Ludong UniversityYantai 264025China School of Chemistry and Materials Science Ludong UniversityYantai 264025China

With the development of aquaculture, there is an urgent demand for an alternative antibacterial agent to reduce the drug resistance and environmental pollution caused by the abuse of antibiotics. Recently, silver nanoparticles（Ag NPs） have been viewed as a novel type of antimicrobial agents due to their unique advantages. In this study,Ag NPs were biosynthesized with the ginger rhizomes extract. The biosynthesized Ag NPs were characterised by UV–visible spectroscopy, transmission electron microscopy, X-ray diffraction and fourier transform infrared spectroscopy. Furthermore, the antimicrobial activities of the Ag NPs were fully analyzed against six typical aquatic pathogens. The results indicated that the components in ginger extract could function as the chemical reductant to synthesize Ag NPs. Moreover, compared with the Ag NPs synthesized by chemical methods, the biosynthesized Ag NPs were smaller, and had higher stability and antibacterial activity. Therefore, the biosynthesized Ag NPs using ginger extract may have prospective applications in aquaculture.

关键词： ginger silver nanoparticles biosynthesis antibacterial activity aquatic pathogen

着陆冲击试验系统设计及大型橡胶容器试验验证

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国防科技大学学报 2022年第6期44卷 200-206页

作者：易方孟浩龙刘冲冲北京航空工程技术研究中心北京100076 中国航空工业集团公司中国飞机强度研究所陕西西安710065

为确保大型橡胶容器的运输适航性,依据中国民用航空局对运输类飞机的应急着陆过载要求,开展着陆冲击试验系统设计。通过冲击平台仿真设计与校核、波形发生器仿真设计、摆锤系统与导向机构设计,构建了着陆冲击试验系统,有效负载约达20 t... 详细信息

为确保大型橡胶容器的运输适航性,依据中国民用航空局对运输类飞机的应急着陆过载要求,开展着陆冲击试验系统设计。通过冲击平台仿真设计与校核、波形发生器仿真设计、摆锤系统与导向机构设计,构建了着陆冲击试验系统,有效负载约达20 t,最大冲击载荷达到400 t。选取大型橡胶容器作为典型空运物资进行应急着陆实装试验验证,结果表明:冲击波形均近似为三角波,与仿真曲线波形相似,过载峰值分别为侧向1.54g、航向3.06g、9.02g、16.20g,与目标峰值最大相对误差小于3%,峰值对应时间大于50 ms,试验系统符合设计要求。该试验系统可用于空运平台的研制,对于确保飞行安全、降低研制风险、提高空运适航性具有重要的意义。

关键词：橡胶容器着陆冲击试验系统仿真设计应急着陆

Recognition of the inducible,secretory small protein OsSSP1 by the membrane receptor OsSSR1 and the co-receptor OsBAK1 confers rice resistance to the blast fungus

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Molecular Plant 2024年第5期17卷 807-823页

作者： Tianfeng Zhao Shijie Ma Ziying Kong Haimiao Zhang Yi Wang Junzhe Wang Jiazong liu Wanzhen Feng Tong liu Chunyan liu Suochen Liang Shilin Lu Xinyu Li Haipeng Zhao chongchong Lu Muhammad Zunair Latif Ziyi Yin Yang Li Xinhua Ding State Key Laboratory of Crop Biology Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect PestsCollege of Plant ProtectionShandong Agricultural UniversityTaian 271018ShandongChina College of Breeding and Multiplication(Sanya Institute of Breeding and Multiplication) Hainan UniversitySanya 572024HainanChina

The plant apoplast,which serves as the frontline battleground for long-term host–pathogen interactions,harbors a wealth of disease resistance ***,the identification of the disease resistance proteins in the apoplast is relatively *** this study,we identified and characterized the rice secretory protein OsSSP1(Oryza sativa secretory small protein 1).OsSSP1 can be secreted into the plant apoplast,and either in vitro treatment of recombinant OsSSP1 or overexpression of OsSSP1 in rice could trigger plant immune *** expression of OsSSP1 is suppressed significantly during Magnaporthe oryzae infection in the susceptible rice variety Taibei 309,and OsSSP1-overexpressing lines all show strong resistance to *** the knockout and overexpression results,we found that OsSSP1 positively regulates plant immunity in response to fungal ***,the recognition and immune response triggered by OsSSP1 depend on an uncharacterized transmembrane OsSSR1(secretory small protein receptor 1)and the key co-receptor OsBAK1,since most of the induced immune response and resistance are lost in the absence of OsSSR1 or ***,the OsSSP1 protein is relatively stable and can still induce plant resistance after 1 week of storage in the open environment,and exogenous OsSSP1 treatment for a 2-week period did not affect rice ***,our study reveals that OsSSP1 can be secreted into the apoplast and percepted by OsSSR1 and OsBAK1 during fungal infection,thereby triggering the immune response to enhance plant resistance to *** findings provide novel resources and potential strategies for crop breeding and disease control.

关键词： rice plant apoplast OsssP1 receptor plant resistance Magnaporthe oryzae