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基于翼板横向位移模式的箱梁剪力滞效应分析

铁道学报 2024年第5期46卷 171-178页

作者：张玉元马啸张元海张慧兰州交通大学土木工程学院甘肃兰州730070

以剪翘变形状态为分析对象,综合运用广义坐标法、剪翘变形协调条件和平衡微分方程,提出箱梁的翼板横向位移模式。基于最小势能驻值原理,推导考虑翼板横向位移影响的箱梁剪力滞解析解。引入翼板横向位移对剪力滞影响的差值比参数,详细分... 详细信息

以剪翘变形状态为分析对象,综合运用广义坐标法、剪翘变形协调条件和平衡微分方程,提出箱梁的翼板横向位移模式。基于最小势能驻值原理,推导考虑翼板横向位移影响的箱梁剪力滞解析解。引入翼板横向位移对剪力滞影响的差值比参数,详细分析截面参数及梁端约束条件对剪力滞差值比的影响。算例分析表明:翼板横向位移对剪力滞有一定的削弱作用,考虑横向位移的纵向应力与有限元解、实测值吻合更好;跨宽比、高宽比越大,剪力滞差值比越小;悬臂板宽度越大,剪力滞系数差值比越小;梁端约束条件越强,剪力滞差值比分布曲线越陡峭,约束条件较强时需考虑横向位移的影响。

关键词：箱梁剪力滞翼板横向位移截面参数梁端约束条件

Synthesis and Spectroscopic Properties of a Series of New tetra-Substituted Metal Phthalocyanines

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Chemical Research in Chinese Universities 2008年第2期24卷 123-128页

作者： YU Hai-ling YANG jin, FU Qiang ma Ji-cheng LI Wei-li Faculty of Chemistry Northeast Normal University Changehun 130024 P. R. China

A new class of metal phthalocyanines（MPcs） containing four 8-quinolinol（8-QH） derivative moieties were successfully synthesized and characterized by mass spectroscopy, IR, UV-Vis and element analysis, the results of which were consistent with the proposed structures. All of them can dissolve in common organic solvents, such as dichloromethane, chloroform, and acetone. The effect of metal ion on the absorption of Q band was studied with UV-Vis spectra. The fluorescent properties for those complexes were also investigated.

关键词： Metal phthalocyanines Soluble 8-Quinolinol UV-Vis spectrum

Human CD56+CD39+ dNK cells support fetal survival through controlling trophoblastic cell fate:immune mechanisms of recurrent early pregnancy loss

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National Science Review 2024年第06期 129-145页

作者： Wentong Jia Liyang ma Xin Yu Feiyang Wang Qian Yang Xiaoye Wang Mengjie Fan Yan Gu Ran Meng Jian Wang Yuxia Li Rong Li Xuan Shao Yan-Ling Wang State Key Laboratory of Stem cell and Reproductive Biology Key Laboratory of Organ Regeneration and ReconstructionInstitute of ZoologyChinese Academy of Sciences Beijing Institute for Stem Cell and Regenerative Medicine University of the Chinese Academy of Sciences NHC Key Lab of Reproduction Regulation Shanghai Engineering Research Center of Reproductive Health Drug and Devices Shanghai Institute for Biomedical and Pharmaceutical Technologies National Clinical Center for Obstetrics and Gynecology Peking University Third Hospital Department of Family Planning The Second Hospital of Tianjin Medical University Department of Prenatal Screening Haidian Maternal and Child Health Hospital

Decidual natural killer（dNK） cells are the most abundant immune cells at the maternal-fetal interface during early pregnancy in both mice and humans, and emerging single-cell transcriptomic studies have uncovered various human dNK subsets that are disrupted in patients experiencing recurrent early pregnancy loss（RPL） at early gestational stage, suggesting a connection between abnormal proportions or characteristics of dNK subsets and RPL pathogenesis. However, the functional mechanisms underlying this association remain unclear. Here, we established a mouse model by adoptively transferring human dNK cells into pregnant NOG（NOD/Shi-scid/IL-2Rγnull） mice, where human dNK cells predominantly homed into the uteri of recipients. Using this model, we observed a strong correlation between the properties of human dNK cells and pregnancy outcome. The transfer of dNK cells from RPL patients（dNK-RPL）remarkably worsened early pregnancy loss and impaired placental trophoblast cell differentiation in the recipients. These adverse effects were effectively reversed by transferring CD56+CD39+dNK *** studies revealed that CD56+CD39+dNK subset facilitates early differentiation of mouse trophoblast stem cells（m TSCs） towards both invasive and syncytial pathways through secreting macrophage colony-stimulating factor（M-CSF）. Administration of recombinant M-CSF to NOG mice transferred with dNK-RPL efficiently rescued the exacerbated pregnancy outcomes and fetal/placental development. Collectively, this study established a novel humanized mouse model featuring functional human dNK cells homing into the uteri of recipients and uncovered the pivotal role of M-CSF in fetal-supporting function of CD56+CD39+dNK cells during early pregnancy, highlighting that M-CSF may be a previously unappreciated therapeutic target for intervening RPL.

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基于SAC的炼厂原油储运调度方法

化工进展 2024年第3期43卷 1167-1177页

作者：马楠李洪奇刘华林杨磊中国石油大学(北京)信息科学与工程学院北京102249 中国石油天然气股份有限公司规划总院北京100083 中国石油天然气股份有限公司油气业务链优化重点实验室北京100083

目前对于炼厂原油储运调度决策的研究大多采用基于数学规划的静态调度方案,求解时间较长并且无法针对环境的变化进行实时高效的储运调度优化。为此,本文结合深度强化学习算法建立了考虑炼厂生产约束的原油资源储运动态实时调度决策算法... 详细信息

目前对于炼厂原油储运调度决策的研究大多采用基于数学规划的静态调度方案,求解时间较长并且无法针对环境的变化进行实时高效的储运调度优化。为此,本文结合深度强化学习算法建立了考虑炼厂生产约束的原油资源储运动态实时调度决策算法。该算法首先将炼厂原油资源调度问题转换为马尔可夫决策过程,其次提出了一种基于软演员-评论家(soft actor-critic,SAC)的深度强化学习算法来同时确定调度过程中的传输目标等离散决策以及传输速度等连续决策。结果表明,算法学习到的策略可行性较好,与基线算法相比,油轮在港时间、调度方案事件数量、加工计划执行率等重要指标方面均得到了较好的效果,在求解时间方面大幅提升至毫秒级,并有效控制随机事件对整体决策的影响范围。该算法可为沿海炼厂原油储运调度快速决策提供新的思路。

关键词：炼厂原油储运资源调度深度强化学习软演员-评论家

Recent advances in anode materials for potassium-ion batteries:A review

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Nano Research 2021年第12期14卷 4442-4470页

作者： Lianbo ma Yaohui Lv Junxiong Wu Chuan Xia Qi Kang Yizhou Zhang Hanfeng Liang Zhong jin School of materials Science and Engineering Anhui University of TechnologyMaanshan243002China Key Laboratory of Mesoscopic Chemistry of Ministry of Education(MOE) Jiangsu Key Laboratory of Advanced Organic MaterialsState Key Laboratory of Coordination ChemistrySchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing210023China Shenzhen Research Institute of Nanjing University Shenzhen518063China Department of Mechanical Engineering The Hong Kong Polytechnic UniversityKowloonHong KongChina School of materials and Energy University of Electronic Science and Technology of ChinaChengdu610054China Department of Polymer Science and Engineering Shanghai Key Laboratory of Electrical Insulation and Thermal AgeingShanghai Jiao Tong UniversityShanghai200240China Institute of Advanced materials and Flexible Electronics(IAMFE) School of Chemistry and Materials SciencesNanjing University of Information Science&TechnologyNanjing210044China College of Chemistry and Chemical Engineering Xiamen UniversityXiamen361005China

Potassium-ion batteries(PIBs)are appealing alternatives to conventional lithium-ion batteries(LIBs)because of their wide potential window,fast ionic conductivity in the electrolyte,and reduced ***,PIBs suffer from sluggish K+reaction kinetics in electrode materials,large volume expansion of electroactive materials,and the unstable solid electrolyte *** strategies,especially in terms of electrode design,have been proposed to address these *** this review,the recent progress on advanced anode materials of PIBs is systematically discussed,ranging from the design principles,and nanoscale fabrication and engineering to the structure-performance ***,the remaining limitations,potential solutions,and possible research directions for the development of PIBs towards practical applications are *** review will provide new insights into the lab development and real-world applications of PIBs.

关键词： potassium-ion batteries anode materials nanoscale engineering electrode design

城市水灾下交通路网基础设施(群)韧性研究综述

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东南大学学报（自然科学版） 2024年第2期54卷 329-345页

作者：熊文张大牛马小龙蔡春声东南大学交通学院南京211189

从韧性研究角度出发,结合水动力模型与交通流理论,对城市水灾下交通路网基础设施(群)分析理论、运行机制、模型构建、安全管控、恢复提升等进行分析与阐述.首先,运用文献计量法,分析水灾下路网韧性研究概况与发展历程,明晰城市水灾下路... 详细信息

从韧性研究角度出发,结合水动力模型与交通流理论,对城市水灾下交通路网基础设施(群)分析理论、运行机制、模型构建、安全管控、恢复提升等进行分析与阐述.首先,运用文献计量法,分析水灾下路网韧性研究概况与发展历程,明晰城市水灾下路网分析方向热点与演进历程;其次,从城市水淹计算与水灾交通路网2个角度,系统梳理城市雨洪场景与设施交互的计算理论;进而,分别从交通路网基础设施与城市水灾之间的相互影响、地上立交枢纽与地下交通设施水灾分析以及水灾下城市交通路网韧性分析与度量出发,阐述城市水灾与交通路网基础设施交互机制;然后,从灾前预防、灾中调度以及灾后恢复3个阶段,说明城市路网水灾处置与性能恢复策略.最后,归纳既有研究面临的主要问题与挑战,并从基于信息物理融合的智能调度、计入垂向尺度的交通设施抗水分析、面向实际场景的高精度恢复模型等方面,对极端气候下城市交通路网基础设施(群)韧性研究未来方向进行研判.

关键词：水灾韧性交通基础设施城市路网

Transformation and migration of phosphorus in excess sludge reduction pretreatment by alkaline ferrate oxidation combined with anaerobic digestion

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Journal of Environmental Sciences 2020年第6期32卷 224-234页

作者： Xiang Li Yan Yuan Yong Huang Chao-ran Guo Run jin Ting-ting Liu Jun ma School of Environmental Science and Engineering Suzhou University of Science and TechnologySuzhou 215009China National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology Suzhou 215009China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of TechnologyHarbin 150090China

Recently,more and more attention has been paid to the strong oxidation ability of newly prepared potassium ferrate(NAPF) in sludge reduction process,but less attention has been paid to the change of phosphorus in this *** feasibility of phosphorus migration and transformation during excess sludge reduction pretre atment using NAPF pre-oxidation combined with anaerobic digestion was *** 70 mg/g suspended solids NAPF pretreatment and 16 days anaerobic digestion,the solid-phase volatile suspended solids decreased by 44.2%,and much organic matter had been released into the liquid-phase and then degraded during digestion by indigenous *** the sludge pre-oxidation process was performed,solid-phase organic phosphorus and chemically combined phosphorus also released into the liquid-phase as PO4^3-,peaking at 100 mg/*** anaerobic digestion,the Fe3+in the liquid-phase was gradually reduced to Fe2+,and then formed Fe^2+-PO4^3- compound crystals and re-migrated to the *** concentration of PO4^3- decreased to 17.08± 1.1 mg/L in the liquid-phase after anaerobic ***,the phosphorus in the Fe^2+-PO4^3- compound accounts for 80% of the total phosphorus in the solid-phase.A large number of vivianite crystals in sludge were ***,this technology not only effectively reduces sludge,but also increases the proportion of PO43-in the sludge in the form of Vivianite.

关键词： Excess sludge Alkaline ferrate(NAPF) pre-oxidation Anaerobic digestion phosphorus Migration and transformation

基于多判别器双流生成对抗网络的红外与可见光图像融合

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兵工学报 2024年第6期45卷 1799-1812页

作者：武凌霄康家银姬云翔马寒雁江苏海洋大学电子信息学院江苏连云港222005

针对现有的红外与可见光图像融合方法对源图像信息保留不充分的问题,改进了一种基于多判别器双流生成对抗网络(Generative Adversarial Network,GAN)的红外与可见光图像融合算法。改进的GAN融合框架包含一个生成器与四个判别器,将差分... 详细信息

针对现有的红外与可见光图像融合方法对源图像信息保留不充分的问题,改进了一种基于多判别器双流生成对抗网络(Generative Adversarial Network,GAN)的红外与可见光图像融合算法。改进的GAN融合框架包含一个生成器与四个判别器,将差分图像作为辅助信息,从而进一步提升网络的融合性能。算法中的差分图像不仅被作为源图像的附加信息,引导生成器关注不同模态图像的独特信息,还被用作真实数据分布,协助差分判别器与生成器进行对抗训练。所改进网络模型中,生成器采用双编码器-单解码器结构,其中编码器旨在提取不同模态特征,主要采用密集连接结构,并结合注意力模块;解码器旨在根据联结高维特征重构出融合图像。判别器对输入图像是来自真实图像还是融合图像进行判断,并根据判断的结果对生成器进行约束优化。实验结果表明,相较于对比算法,所提算法在主观判读和客观指标评价两方面均取得了更优异的融合效果。

关键词：图像融合红外图像差分图像生成对抗网络注意力机制

城市形态的多维特征与模式识别——以中美欧实体城市为例

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武汉大学学报（信息科学版） 2024年第6期49卷 1005-1017页

作者：焦利民王玉马淼徐智邦武汉大学资源与环境科学学院湖北武汉430079 武汉大学地理信息系统教育部重点实验室湖北武汉430079 中国科学院城市环境研究所城市环境与健康重点实验室福建厦门361021

从多维度、大尺度视角识别城市形态模式及其分异,是城市格局、过程及效应研究的基础,但该方向仍是一个重要挑战。综合物理空间和社会空间视角构建了城市形态的多维表征体系和形态模式识别方法;以中国、美国、欧洲的2 475个实体城市为例... 详细信息

从多维度、大尺度视角识别城市形态模式及其分异,是城市格局、过程及效应研究的基础,但该方向仍是一个重要挑战。综合物理空间和社会空间视角构建了城市形态的多维表征体系和形态模式识别方法;以中国、美国、欧洲的2 475个实体城市为例,识别出6种主要城市形态模式,即高密度型、高聚合低密度型、低聚合低密度型、多中心高集聚型、多中心高混合型和多中心低混合型。中国城市多为高密度型和多中心高集聚型,以胡焕庸线为界呈显著“西北-东南”差异;美国城市多为高聚合低密度型、低聚合低密度型和多中心低混合型,并表现出东西分异;欧洲主要为多中心高混合型城市,少数其他类型城市多沿西南海岸线分布。多维城市形态模式可为跨区域城市比较研究、城市格局和过程效应、城市演化模拟等提供精细化综合分类依据。

关键词：城市形态城市分类跨国城市比较聚类分析