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嵌入注意力机制的轻量级雾炮车检测网络

环境工程学报 2024年第5期18卷 1434-1441页

作者：钟逸伦刘黎志李赢杰武汉工程大学智能机器人湖北省重点实验室武汉430205 武汉工程大学计算机科学与工程学院武汉430205 武汉雷特科技有限公司武汉430070

针对我国发生多起雾炮车违规喷雾空气自动监测站事件,雾炮车数据集空白,雾炮车所喷的雾的形状各异难以标注,监测实时要求高,准确率高等问题。本研究建立了雾炮车喷雾数据集,设计了一种雾的标注方式,并在YOLOv5网络基础上,提出了一个嵌... 详细信息

针对我国发生多起雾炮车违规喷雾空气自动监测站事件,雾炮车数据集空白,雾炮车所喷的雾的形状各异难以标注,监测实时要求高,准确率高等问题。本研究建立了雾炮车喷雾数据集,设计了一种雾的标注方式,并在YOLOv5网络基础上,提出了一个嵌入注意力机制的轻量级雾炮车检测网络。首先,利用K-means++计算出更适合任务的锚框;其次,嵌入注意力机制(CA)模块,用于提升网络特征提取能力;然后将Neck处Conv修改GSConv,并将C3模块更换为GSC3模块,以降低模型参数;最后,将NMS替换为Soft NMS,用于减少漏检增强检测稳定性。实验结果表明,所提标注方式较其他标注方式提升了总体mAP13%;所提网络的参数量仅为YOLOv5s的83%并达到67.8%的mAP。与主流目标检测网络相比,所提网络在保持精度提升的同时降低了参数量,并保持了检测速度。

关键词：雾炮车目标检测注意力机制轻量级 YOLOv5

Two antibodies show broad,synergistic neutralization against SARS-CoV-2 variants by inducing conformational change within the RBD

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Protein & Cell 2024年第2期15卷 121-134页

作者： Hui Sun Tingting Deng Yali Zhang Yanling Lin Yanan Jiang Yichao Jiang Yang Huang Shuo Song Lingyan Cui Tingting Li Hualong Xiong Miaolin Lan Liqin Liu Yu Li Qianjiao Fang Kunyu Yu Wenling Jiang lizhi Zhou Yuqiong Que Tianying Zhang Quan Yuan Tong Cheng Zheng Zhang Hai Yu Jun Zhang Wenxin Luo Shaowei Li Qingbing Zheng Ying Gu Ningshao Xia State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics School of Public HealthSchool of Life SciencesXiamen UniversityXiamen 361102China National Institute of Diagnostics and Vaccine Development in Infectious Diseases School of Public HealthSchool of Life SciencesXiamen UniversityXiamen 361102China State Key Laboratory of Vaccines for Infectious Diseases School of Public HealthSchool of Life SciencesXiamen UniversityXiamen 361102China Xiang An Biomedicine Laboratory Xiamen 361102China Institute for Hepatology National Clinical Research Center for Infectious DiseaseShenzhen Third People's HospitalSchool of MedicineSouthem University of Science and TechnologyShenzhen 518112China The Second Affliated Hospital School of MedicineSouthern University of Science and TechnologyShenzhen 518112China Research Unit of Frontier Technology of Structural Vaccinology Chinese Academy of Medical SciencesXiamen 361102China

Continual evolution of the severe acute respiratory syndrome coronavirus(SARS-CoV-2)virus has allowed for its gradual evasion of neutralizing antibodies(nAbs)produced in response to natural infection or *** rapid nature of these changes has incited a need for the development of superior broad nAbs(bnAbs)and/or the rational design of an antibody cocktail that can protect against the mutated virus ***,we report two angiotensin-converting enzyme 2 competing nAbs—8H12 and 3E2—with synergistic neutralization but evaded by some Omicron ***-electron microscopy reveals the two nAbs synergistic neutralizing virus through a rigorous pairing permitted by rearrangement of the 472-489 loop in the receptor-binding domain to avoid steric *** antibodies based on these two nAbs tremendously extend the neutralizing breadth and restore neutralization against recent variants including currently dominant ***,these findings expand our understanding of the potential strategies for the neutralization of SARS-CoV-2 variants toward the design of broad-acting antibody therapeutics and vaccines.

关键词： SARS-CoV-2 broad neutralizing antibody rearrangement synergistic neutralization

Recent progress in porous organic polymers and their application for CO_(2) capture

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Chinese Journal of Chemical Engineering 2022年第2期35卷 91-103页

作者： Jiajia Wang lizhi Wang You Wang du Zhang Qin Xiao Jianhan Huang You-Nian Liu College of Chemistry and Chemical Engineering Hunan Provincial Key Laboratory of Micro and Nano Material Interface ScienceCentral South UniversityChangsha 410083China

Carbon capture,storage,and utilization(CCSU)is recognized as an effective method to reduce the excessive emission of CO_(2).Absorption by amine aqueous solutions is considered highly efficient for CO_(2) capture from the flue gas because of the large CO_(2) capture capacity and high ***,it is often limited by the equipment corrosion and the high desorption energy consumption,and adsorption of CO_(2) using solid adsorbents has been receiving more attention in recent years due to its simplicity and high *** recently,a great number of porous organic polymers(POPs)have been designed and constructed for CO_(2) capture,and they are proven promising solid adsorbents for CO_(2) capture due to their high Brunauer-Emmett-Teller(BET)surface area(SBET),adjustable pore size and easy *** particular,they usually have rigid skeleton,permanent porosity,and good physiochemical *** this review,we have a detailed review for the different POPs developed in recent years,not only the design strategy,but also the special structure for CO_(2) *** outlook of the opportunities and challenges of the POPs is also proposed.

关键词： Porous organic polymers Selectivity Adsorbent CO_(2)capture

亚声速可压缩流场叶片边界层热线测速方法研究

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推进技术 2024年第4期45卷 222-232页

作者：张洲项效镕王立志佟鑫赵巍赵庆军中国科学院工程热物理研究所北京100190 中国科学院大学航空宇航学院北京100049 中国科学院工程热物理研究所轻型动力重点实验室北京100190

为了能够开发一种简单有效的亚声速可压缩流场叶片边界层速度测量方法,从而为叶型设计和相关数值研究工作提供支撑,本文围绕热线风速测量技术,针对可压缩流场密度变化对热线标定结果的影响,以及实际测量中速度、密度耦合而无法直接获取... 详细信息

为了能够开发一种简单有效的亚声速可压缩流场叶片边界层速度测量方法,从而为叶型设计和相关数值研究工作提供支撑,本文围绕热线风速测量技术,针对可压缩流场密度变化对热线标定结果的影响,以及实际测量中速度、密度耦合而无法直接获取的问题,通过理论分析,提出了适用于边界层测量的恒定压力热线标定方法和引入叶表稳态静压进行速度解耦的方法,并对所提出方法的主要误差进行了分析评估。在此基础上进行了热线标定和边界层速度测量试验验证,明确了恒定压力热线标定数学模型系数随压力的线性变化规律,同时针对温度非线性影响提出了一种基于过热比调整的修正方法,该方法能够将约13℃的温度偏差对热线电压的影响降低到1%以内,进一步简化了恒定压力热线标定流程,结合基于叶表稳态静压的速度解耦方法,为亚声速可压缩流场叶片边界层瞬态速度测量提供了一种简单可行的高频响测速方法。

关键词：压气机边界层热线风速仪可压缩流场叶栅

中国式现代化:“体”“用”模式与人类命运共同体

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湖南工业大学学报（社会科学版） 2024年第4期29卷 1-8,49页

作者：黄力之中共上海市委党校哲学教研部上海200233

世界现代化进程中,19世纪形成的体用一元的模式(西方开创的工业化为用、西方民主制度和西方价值观为体模式)已经难以为继了,更多非西方国家开创了体用二元的模式(西方开创的工业化为用、非西方政治制度和非西方价值观为体模式)。体用二... 详细信息

世界现代化进程中,19世纪形成的体用一元的模式(西方开创的工业化为用、西方民主制度和西方价值观为体模式)已经难以为继了,更多非西方国家开创了体用二元的模式(西方开创的工业化为用、非西方政治制度和非西方价值观为体模式)。体用二元模式意味着差别性现代化也即多样性现代化的存在。“中体西用”模式其实是多样性现代化的早期表述,当下的中国式现代化为多样性现代化提供了楷模。为了解决人类社会的差别性现代化矛盾与当下的共同性危机,中国提出了“人类命运共同体”倡议,其超越了社会制度、意识形态、历史文明之争,中国式现代化凭此称之为“人类文明新形态”。

关键词：现代化模式体用二元模式人类命运共同体中国式现代化

Quantum anomalous Hall effect in two-dimensional Cu-dicyanobenzene coloring-triangle lattice

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Nano Research 2020年第6期13卷 1571-1575页

作者： Yixuan Gao Yu-Yang Zhang Jia-Tao Sun lizhi Zhang Shengbai Zhang Shixuan du Institute of Physics Chinese Academy of SciencesBeijing100190China University of Chinese Academy of Sciences Beijing100049China CAS Center for Excellence in Topological Quantum Computation Beijing100190China School of Information and Electronics MIIT Key Laboratory for Low-Dimensional Quantum Structure and DevicesBeijing Institute of TechnologyBeijing100081China Rensselaer Polytechnic Institute TroyNew York12180USA Songshan Lake Materials Laboratory Dongguan523808China

Metrics details Abstract Magnetic two-dimensional(2D)topological insulators with spontaneous magnetization have been predicted to host quantum anomalous Hall effects(QAHEs).For organic topological insulators,the QAHE only exists in honeycomb or Kagome organometallic lattices based on theoretical ***,coloring-triangle(CT)lattice has been found to be mathematically equivalent to a Kagome lattice,suggesting a potential 2D lattice to realize ***,based on first-principles calculations,we predict an organometallic CT lattice,Cu-dicyanobenzene(DCB),to be a stable QAH *** exhibits ferromagnetic(FM)properties as a result of the charge transfer from metal atoms to DCB ***,based on the Ising model,the Curie temperature of the FM ordering is calculated to be around 100 *** the Chern numbers and the chiral edge states of the semi-infinite Cu-DCB edge structure,which occur inside the spin-orbit coupling band gap,confirm its nontrivial topological *** make the Cu-DCB CT lattice an ideal candidate to enrich the family of QAH insulators.

关键词： quantum anomalous Hall effect organic topological insulators coloring-triangle lattice Kagome lattice

基于流线曲率法的超临界二氧化碳离心压缩机通流计算方法

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热力发电 2024年第2期53卷 124-132页

作者：戎毅廖凯龙孙恩慧王立志沈阳飞机设计研究所扬州协同创新研究院有限公司江苏扬州225111 低品位能源多相流与传热北京市重点实验室(华北电力大学) 北京102206

超临界二氧化碳(S-CO_(2))的真实气体特性使得开展S-CO_(2)离心压缩机的三维数值模拟难以获得稳定的收敛结果,同时,数值计算的时间成本进一步增加了压缩机设计优化的难度。对此,本文首先对压缩机开展三维数值模拟,得到流场信息及对应的... 详细信息

超临界二氧化碳(S-CO_(2))的真实气体特性使得开展S-CO_(2)离心压缩机的三维数值模拟难以获得稳定的收敛结果,同时,数值计算的时间成本进一步增加了压缩机设计优化的难度。对此,本文首先对压缩机开展三维数值模拟,得到流场信息及对应的损失分布,然后在传统流线曲率法中叠加一维损失模型,并沿流线分段计算CO_(2)压缩因子,以此反映真实气体的压缩过程,建立适用于S-CO_(2)离心压缩机的通流计算方法。将通流计算结果与三维数值模拟结果进行对比后发现:流线曲率法得到的子午面相对速度场分布和焓分布与计算流体动力学(computational fluid dynamics,CFD)结果基本一致;叶片出口温压数据与CFD结果接近,误差分别为0.23%和1.08%,总静等熵效率相差1.5%。结果表明,采用流线曲率法的通流计算可以快速获得较准确的S-CO_(2)离心压缩机叶轮性能参数。

关键词：离心压缩机流线曲率法损失模型性能预测

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新媒体背景下高校法律教育策略探赜

成才之路 2024年第10期 37-40页

作者：谢立志岳阳开放大学开放教育学院湖南岳阳414000

智能手机、社交媒体平台和在线新闻等新事物的出现,使信息传播的方式和速度发生了翻天覆地的变化。高校法律教育领域也不例外,必须适应这一数字媒体背景下的新格局。高校应分析新媒体对法律教育的影响,注重教育技术的整合,重视社交媒体... 详细信息

智能手机、社交媒体平台和在线新闻等新事物的出现,使信息传播的方式和速度发生了翻天覆地的变化。高校法律教育领域也不例外,必须适应这一数字媒体背景下的新格局。高校应分析新媒体对法律教育的影响,注重教育技术的整合,重视社交媒体在法学教育中的应用,注重法律案例的研究,使其适应不断变化的数字环境,培养更具创新能力和应变能力的法律专业人才。

关键词：新媒体高校法律教育教育技术社交媒体法律案例

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Unraveling the reaction mechanism of low dose Mn dopant in Ni(OH)_(2) supercapacitor electrode

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Journal of Energy Chemistry 2021年第10期30卷 497-506,I0013页

作者： Zhiguo Zhang Hua Huo Zhenjiang Yu lizhi Xiang Bingxing Xie Chunyu du Jiajun Wang Geping Yin Key Laboratory of Materials for New Energy Conversion and Storage(Ministry of Industry and Information Technology) School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001HeilongjiangChina

Mn doping is deemed as a promising strategy to improve the electrochemical performance of the a-Ni(OH)_(2)battery-type supercapacitor ***,the internal structure evolution,the pathways and the dynamics of the proton/intercalated anion migration,as well as the functioning mechanism of Mn dopant to stabilize the layered structure during cycles remain ***,we unveil that irreversible oxidization of Mn^(3+)at the initial CV cycles,which will remain as Mn^(4+)in the NiO_(2)slabs after the first oxidization to effectively suppress the phase transformation fromα-Ni(OH)_(2)/γ-NiOOH toβ-Ni(OH)_(2)/β-NiOOH and further maintain the structural integrity of *** a synergistic combination of theoretical calculations and various structural probes including XRD and^(2)H MAS solid state NMR,we decode the structure evolution and dynamics in the initial CV(cyclic voltammetry)cycles,including the absorption/desorption of hydrogen containing species,migration of intercalated anions/water molecules and the change of interlayer *** present work elucidates a close relationship between doping chemistry and structural reliability,paving a novel way of reengineering supercapacitor electrode materials.

关键词： Reaction mechanism Structure evolution ^(2)H MAS NMR Layered double hydroxides Local environments