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Steric hindrance modulation of hexaazatribenzanthraquinone isomers for high-capacity and wide-temperature-range aqueous proton battery

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National Science Review 2024年第4期11卷 271-282页

作者： Mingsheng Yang Yuxin Hao Bei Wang Yan Wang Liping Zheng Rui Li Huige ma Xinyu Wang Xiaoming Jing Hongwei Li Mengxiao Li Zhihui Wang Yujie Dai Guangcun Shan mingjun Hu Jun Luo Jun Yang School of materials Science and Engineering Beihang University Beijing Institute of Nanoenergy &Nanosystems Chinese Academy of Sciences Center on Nanoenergy Research School of Physical Science & TechnologyGuangxi University School of Chemistry and Chemical Engineering Center on Nanoenergy Research Guangxi University School of Instrumentation Science and Opto-electronics Engineering Beihang University ShenSi Lab Shenzhen Institute for Advanced StudyUniversity of Electronic Science and Technology of China

Organic materials with rich active sites are good candidates of high-capacity anodes in aqueous batteries,but commonly low utilization of active sites limits their ***,two isomers,symmetric and asymmetric hexaazatribenzanthraquinone（s-HATBAQ and a-HATBAQ）,with rich active sites have been synthesized in a controllable *** has been revealed for the first time that a sulfuric acid catalyst can facilitate the stereoselective formation of *** to the reduced steric hindrance in favor of proton insertion as well as the amorphous structure conducive to electrochemical dynamics,s-HATBAQ exhibits 1.5 times larger specific capacity than ***,the electrode of s-HATBAQ with50% reduced graphene oxide（s-HATBAQ-50%rGO） delivers a record high specific capacity of405 mah g-1in ***,the assembled MnO2//s-HATBAQ-50%rGO aqueous proton full batteries show an exceptional cycling stability at 25℃ and can maintain ～92% capacity after1000 cycles at 0.5 A g-1at-80℃.This work demonstrates the controllable synthesis of isomers,showcases a wide-temperature-range prototype proton battery and highlights the significance of precise mole cular structure modulation in organic energy storage.

关键词： stereoisomers steric effect aqueous battery super cycling stability ultra-low temperature proton battery

Heterostructured Co_(3)Se_(4)/CoSe_(2)@C nanoparticles attached on three-dimensional reduced graphene oxide as a promising anode towards Li-ion batteries

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Frontiers of materials Science 2024年第2期18卷 101-115页

作者： mingjun Pang Zhaoyang Song Miaomiao mao Shang Jiang Ruxia Zhang Runwei Wang Jianguo Zhao Engineering Research Center of Coal-based Ecological Carbon Sequestration Technology of the Ministry of Education Shanxi Datong UniversityDatong 037009China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012China

In situ carbon-coated Co_(3)Se_(4)/CoSe_(2)(Co_(x)Se_(y))nanoparticles(NPs)attached on three-dimensional(3D)reduced graphene oxide(rGO)sheets were skillfully developed in this work,which involved the environment-friendly hydrothermal method,freeze drying,and selenide *** the structure,the glucose-derived carbon layer exhibited significantly homogeneous dispersion under an argon *** structure not only has enhanced stability,but also can effectively mitigate the volume swell of Co_(x)Se_(y) *** resulted Co_(3)Sea/CoSe_(2)@C/rGO(CSe@C/rGO)exhibited a specific surface area(SSA)of 240.9 m^(2)·g^(-1),offering more electrochemically active sites for the storage of energy related to lithium *** rGO matrix held exceptional flexibility and functional structural rigidity,facilitating the swift ion intercalation and ensuring the high conductivity and recyclability of the *** applied to anodes designed for lithium-ion batteries(LiBs),this material demonstrated distinguished rate and ultra-high reversible capacity(872.98 ma·h·g^(-1) at 0.5 A·g^(-1)).Meanwhile,its capacity retention reached 119.5%after 500 cycles at 2 A·g^(-1),with a coulombic efficiency of 100%.This work potentially paves the way for generating fast and powerful metal selenide anodes and initiating LiBs with good performance.

关键词： CSe@C/rGO lithium-ion battery reduced graphene oxide electrochemicalperformance heterostructure

Exploration and Practice on Artificial Intelligence Information Tech-nology Intergration into Practical Teaching of Acupuncture and mas-sage in the Background of New Medicine

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Medicinal Plant 2024年第5期15卷 79-80,89页

作者： mingjun LIU Xiaochao GANG Chongwen ZHONG Changchun ma Jianzhong CUI Acupuncture and massage College ChangchunUniversity of Chinese MedicineChangchunJilin 130117China

[Objectives]In order to fully leverage the distinctive features of the top-tier national professional discipline of acupuncture and massage.[Methods]According to the characteristics of the scientific attributes of acupuncture and massage,combined with the top-tier na-tional professional AI practical teaching platform and artificial intelligence-related information technology,together with the teaching team with rich teaching experience.[Results]Innovative reforms and practical explorations are being conducted to integrate AI information technology into acupuncture and massage practical teaching under the background of new medicine.[Conclusions]Through practical research,the quali-ty of the practical teaching of students in acupuncture and massage major has been improved,playing a leading and exemplary role in related majors across the country.

关键词： Artificial intelligence Acupuncture and massage Practical teaching

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国内沉管隧道数据统计与发展分析

隧道建设（中英文） 2023年第1期43卷 173-184,I0018-I0029页

作者：郭建民单联君马铭骏广州市市政工程设计研究总院有限公司广东广州510060

为更全面地了解国内沉管隧道现状及技术发展趋势,从所在区域、隧道结构类型及断面形式、管节预制、应用领域等多个维度梳理国内36座沉管隧道项目(截至2022年底,已建20座、在建10座、拟建6座),并根据不同应用领域介绍典型沉管隧道项目及... 详细信息

为更全面地了解国内沉管隧道现状及技术发展趋势,从所在区域、隧道结构类型及断面形式、管节预制、应用领域等多个维度梳理国内36座沉管隧道项目(截至2022年底,已建20座、在建10座、拟建6座),并根据不同应用领域介绍典型沉管隧道项目及进行沉管隧道技术展望。经调研:1)国内沉管隧道建设主要集中于华南地区(包含香港特别行政区和澳门特别行政区),占比达75%,其中广东省共21座沉管隧道,广州市沉管隧道项目最多(14座);2)目前国内沉管隧道以钢筋混凝土结构为主(共32座),且绝大部分为矩形断面;3)国内沉管隧道项目管节宽度在11.5~55.46 m、管节高度在6.4~11.4 m,沉管隧道断面形式布置灵活,适用于人行、市政(公路)、铁路或公铁合建隧道,目前多应用于过江(海底)市政(公路)隧道;4)国内沉管隧道长度最长达5.664 km,管节数目最多达33节,但大部分沉管隧道长度小于1 km,管节数目介于3~10节;5)较多采用的管节预制方式为独立干坞和轴线干坞,分别为14座和9座。

关键词：沉管隧道结构类型断面形式管节预制方式

基于偏振分辨LIBS技术的土壤重金属检测研究

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中国激光 2018年第8期45卷 261-266页

作者：余洋赵南京孟德硕马明俊兰智高黄冈师范学院电子信息学院湖北黄冈438000 中国科学院安徽光学精密机械研究所环境光学与技术重点实验室安徽合肥230031

为提高土壤重金属激光诱导击穿光谱(LIBS)特征谱线的信背比(SBR)和稳定性,并降低元素检测限,研究了土壤LIBS连续背景辐射以及Fe、Pb、Ca、Mg等4种元素特征分立谱线的偏振特性,对比分析了有、无偏振条件下元素特征谱线的相对标准偏差(RSD... 详细信息

为提高土壤重金属激光诱导击穿光谱(LIBS)特征谱线的信背比(SBR)和稳定性,并降低元素检测限,研究了土壤LIBS连续背景辐射以及Fe、Pb、Ca、Mg等4种元素特征分立谱线的偏振特性,对比分析了有、无偏振条件下元素特征谱线的相对标准偏差(RSD)、SBR与检测限。结果表明:4种元素的特征谱线FeⅠ:404.581nm、PbⅠ:405.780nm、CaⅠ:422.670nm和MgⅠ:518.361nm及其相应连续背景辐射的偏振度分别为0.27、0.17、0.25、0.23和0.70、0.64、0.69、0.67。偏振分辨LIBS(PRLIBS)技术使得4条特征谱线FeⅠ:404.581nm、PbⅠ:405.780nm、CaⅠ:422.670nm和MgⅠ:518.361nm的RSD分别降低了3.28%、2.2%、3.24%和1.34%。PRLIBS技术有效抑制了连续背景辐射,4种元素特征谱线的SBR分别提高了5.59、5.67、5.30、7.35倍。在有、无偏振条件下,Pb元素的检测限分别为17.4×10^(-6)和39.4×10^(-6),偏振条件下的检测限为无偏振条件下的44%。以上研究结果为进一步提升土壤重金属的LIBS定量分析能力提供了数据支撑。

关键词：光谱学土壤重金属激光诱导击穿光谱偏振信背比检测限

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新型DA462汽车发动机用分离轴承

轴承 2000年第12期 3-5页

作者：马明君宗丽君牡丹江伯瑞克金属制品有限公司黑龙江牡丹江157011 哈尔滨东安汽车动力股份有限公司黑龙江哈尔滨157999

新设计的自动调心分离轴承总成由深沟球轴承、轴承座、冲压外罩及冲压联接件组成 ,可直接安装使用。运转中自动调心。介绍了轴承座材料及密封结构。附图 2幅 ,参考文献

关键词：汽车发动机分离轴承单元化自动调心离合器

Fulminant myocarditis induced by SARS-CoV-2 infection without severe lung involvement:insights into COvID-19 pathogenesis

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Journal of Genetics and Genomics 2024年第6期51卷 608-616页

作者： Han Du Zhongtao Du Liang Wang Hong Wang mingjun Jia Chunge Zhang Yun Liu Cheng Zhang Ya Zhang Ruifeng Zhang Shuang Zhang Ning Zhang Zhenghai ma Chen Chen Wenjun Liu Hui Zeng George F.Gao Xiaotong Hou Yuhai Bi College of Life Science and Technology Xinjiang UniversityUrumchiXinjiang 830046China CAS Key Laboratory of Pathogen Microbiology and Immunology Institute of MicrobiologyCenter for Influenza Research and Early-warning(CASCIRE)CAS-TWAS Center of Excellence for Emerging Infectious Diseases(CEEID)Chinese Academy of SciencesBeijing 100101China Beijing Anzhen Hospital Capital Medical UniversityBeijing 100029China College of Veterinary Medicine Shanxi Agricultural UniversityTaiyuanShanxi 030031China University of Chinese Academy of Sciences Beijing 100049China Beijing Shijitan Hospital Capital Medical UniversityBeijing 100038China

Severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)infection often leads to pulmonary *** sequelae,including myocarditis and heart failure,have also been ***,the study presents two fulminant myocarditis cases infected by SARS-CoV-2 exhibiting remarkable elevation of cardiac biomarkers without significant pulmonary injury,as determined by imaging *** staining reveals the viral antigen within cardiomyocytes,indicating that SARSCoV-2 could directly infect the *** full viral genomes from respiratory,anal,and myocardial specimens are obtained via next-generation *** analyses of the whole genome and spike gene indicate that viruses in the myocardium/pericardial effusion and anal swabs are closely related and cluster together yet diverge from those in the respiratory *** addition,unique mutations are found in the anal/myocardial strains compared to the respiratory strains,suggesting tissue-specific virus mutation and *** findings indicate genetically distinct SARS-CoV-2 variants have infiltrated and disseminated within myocardial tissues,independent of pulmonary injury,and point to different infection routes between the myocardium and respiratory tract,with myocardial infections potentially arising from intestinal *** findings highlight the potential for systemic SARS-CoV-2 infection and the importance of a thorough multi-organ assessment in patients for a comprehensive understanding of thepathogenesisof COVID-19.

关键词： COVID-19 SARS-CoV-2 Fulminant myocarditis Myocardium Infection

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基于DNN的盾构施工地层横向水平变形预测

河南理工大学学报（自然科学版） 2023年第1期42卷 201-208页

作者：马铭骏潘泓骆冠勇曹洪华南理工大学土木与交通学院广东广州510640 华南理工大学亚热带建筑科学国家重点实验室广东广州510640

为了得到盾构施工地层横向水平变形的有效预测模型,提出一种考虑主要盾构施工参数的深度神经网络(deep neural networks,DNN)模型。由广州某盾构工程得到盾构施工引起的周边地层水平变形数据,利用现场实测数据和主要盾构施工参数对模型... 详细信息

为了得到盾构施工地层横向水平变形的有效预测模型,提出一种考虑主要盾构施工参数的深度神经网络(deep neural networks,DNN)模型。由广州某盾构工程得到盾构施工引起的周边地层水平变形数据,利用现场实测数据和主要盾构施工参数对模型进行训练并结合遗传算法优化DNN模型网络拓扑结构。结合遗传算法计算80个模型后,最终确定DNN模型在训练过程中均方误差MSE经50轮迭代即收敛并趋于零值,模型预测值和实测值基本吻合(拟合优度R2>0.9),且残差随机分布于零值线附近,说明该模型预测效果良好。研究结果可为类似工程构建水平变形预测模型提供参考。

关键词：盾构施工现场实测法深度神经网络横向水平变形变形预测模型

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某项目基坑变形数据分析

工程建设 2016年第2期48卷 35-40页

作者：马明军浙江和润天成置业有限公司浙江杭州310011

结合某项目地质勘察报告和基坑监测原始数据,对该项目基坑的深层土体侧向位移、周边道路沉降、支撑梁柱构件的受力和位移等数据进行了量化分析,得出该基坑变形表现的内在原因,并得到项目支撑构件的抗力使用率较低的结论。建议在基坑围... 详细信息

结合某项目地质勘察报告和基坑监测原始数据,对该项目基坑的深层土体侧向位移、周边道路沉降、支撑梁柱构件的受力和位移等数据进行了量化分析,得出该基坑变形表现的内在原因,并得到项目支撑构件的抗力使用率较低的结论。建议在基坑围护设计中,充分使用支撑构件的结构抗力,同时加强对薄弱点的约束条件,可优化设计,减少工期并节约成本。

关键词：基坑变形围护设计结构抗力