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Journal of Energy Chemistry 2022年第2期31卷 623-629页

作者： Chenyang Shen Qianqian Bao Wenjuan Xue Kaihang sun Zhitao Zhang Xinyu Jia donghai Mei Chang-jun Liu Collaborative Innovation Center of Chemical Science&Engineering School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China State Key Laboratory of Membrane Separation and Membrane Processes School of Environmental Science and EngineeringTiangong UniversityTianjin 300387China

Indium oxide supported nickel catalyst has been experimentally confirmed to be highly active for CO_(2) hydrogenation towards *** this work,the reaction mechanism for CO_(2) hydrogenation to methanol has been investigated on a model Ni/In_(2)O_(3) catalyst,i.e.,Ni_(4)/In_(2)O_(3),via the density functional theory(DFT)*** possible reaction pathways,i.e.,the formate pathway,CO hydrogenation and the reverse water-gas-shift(RWGS)pathways,have been examined on this model *** has been demonstrated that the RWGS pathway is the most theoretically-favored for CO_(2) hydrogenation to *** complete RWGS pathway follows CO_(2)+6 H→COOH+5 H→CO+H_(2)O+4 H→HCO+H_(2)O+3 H→H_(2)CO+H_(2)O+2 H→H_(3)CO+H_(2)O+H→H_(3)COH+H_(2) ***,it has been also proved that the interfacial oxygen vacancy can serve as the active site for boosting the CO_(2) adsorption and charge transfer between the nickel species and indium oxide,which synergistically promotes the consecutive CO_(2) hydrogenation towards methanol.

关键词： CO_(2)hydrogenation Indium oxide Nickel Methanol synthesis Oxygen vacancy Density functional theory

智能网联技术下机载电子电气设备检测系统设计

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电子设计工程 2024年第4期32卷 153-157页

作者：孙小伟张启浩李琦刘畅张东海南方电网有限责任公司超高压输电昆明局云南昆明650214 云南兆富科技有限公司云南昆明650217

机载电子电气设备检测容易受到外界干扰,出现参数辨识不精准,导致检测结果不精准的情况。针对该问题,在智能网联技术下设计机载电子电气设备检测系统。使用嵌入式检测适配器,对输出信号进行放大、隔离、变换处理。结合防错插设计方式,... 详细信息

机载电子电气设备检测容易受到外界干扰,出现参数辨识不精准,导致检测结果不精准的情况。针对该问题,在智能网联技术下设计机载电子电气设备检测系统。使用嵌入式检测适配器,对输出信号进行放大、隔离、变换处理。结合防错插设计方式,确保检测装置安全连接。利用光耦合器实现信号的驱动与变换,使用智能网联技术聚集特征向量构建密度函数,获取聚类同期运行的峰值参数。归一化处理智能网联聚类参数,计算实际与理论辨识参数之间的差值,以此为依据判断设备运行状态。以报文ID数据标识为特征,计算时间窗口为1的信息熵值,实现固定时间窗口下的设备检测。由实验结果可知,该系统在三种场景下与实际熵值的最大误差为1.2,说明使用该系统检测结果较精准。

关键词：智能网联技术机载电子电气设备参数辨识

Air-Steam Etched Construction of Hierarchically Porous Metal-Organic Frameworks

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Chinese Journal of Chemistry 2021年第6期39卷 1538-1544页

作者： Hongliang Huang Yuxiu sun Xuemeng Jia Wenjuan Xue Chenxu Geng Xin Zhao donghai Mei Chongli Zhong State Key Laboratory of Separation Membranes and Membrane Processes School of Chemistry and Chemical EngineeringTiangong UniversityTianjin 300387China

The introduction of mesoporosity into the microporous metal-organic frameworks(MOFs)is expected to expand their ***,we report a green and facile method to obtain hierarchically porous MOF structures by using an air-steam etching *** virtue of the protonation reaction between the imidazole moiety and water vapor,the protonated imidazole related linkers leave the framework,resulting in the formation of mesopores in the zeolitic imidazolate frameworks(ZIFs),as exemplified by *** the mild etching process,the materials'structural integrity and crystallinity are well ***,the hierarchical porous ZIF-8 exhibited enhanced performance in the dye removal as well as CO_(2) cycloaddition reaction with epichlorohydrin in comparison with microporous ZIF-8,owing to the accelerated mass transfer arising from mesoporous ***,the proposed steam etching approach is generally applicable,which can be readily extended to other ZIFs,such as ZIF-14,ZIF-69,and ZIF-71,thus representing a powerful strategy to construct hierarchically porous MOF materials.

关键词： Mesoporous materials Metal-organic frameworks Cycloaddition Steam etching Dye removal

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面向高光谱影像的自监督去噪方法

信息工程大学学报 2024年第4期25卷 441-446页

作者：刘冰孙一帆王瑞瑞安东海王姝信息工程大学河南郑州450001 河南省地矿局测绘地理信息院河南郑州450006 65547部队辽宁海城114200 重庆市地理信息和遥感应用中心重庆401147

针对高光谱影像各个波段包含一定噪声的问题,提出一种基于卷积神经网络的高光谱影像自监督去噪方法。该方法无需任何先验信息,仅依靠噪声影像本身进行训练即可完成去噪。首先在高光谱影像中随机选取局部影像块,并对采样的区域进行滤波处... 详细信息

针对高光谱影像各个波段包含一定噪声的问题,提出一种基于卷积神经网络的高光谱影像自监督去噪方法。该方法无需任何先验信息,仅依靠噪声影像本身进行训练即可完成去噪。首先在高光谱影像中随机选取局部影像块,并对采样的区域进行滤波处理;然后以处理后的影像为输入,将原始影像作为网络优化的目标进行自监督训练。每次训练过程中损失函数的计算将被限制在局部影像块区域内,从而防止网络输出恒等映射。在模拟噪声高光谱数据和真实高光谱数据上的大量实验表明,该方法能够获得比传统方法更好的去噪效果。

关键词：高光谱影像去噪自监督深度学习卷积神经网络

大学生体质健康监测理念传承、实然之需与实践进路——以中山大学为个案

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科教文汇 2024年第11期 16-20页

作者：武东海单建功中山大学体育部广东广州510275

学生体质健康事关全民福祉与其个人长远发展,是衡量人才培养质量的重要标准。该文运用文献资料、数理统计与归纳演绎等方法,以做好学生体质健康监测工作的现实需要为论述基础,以理念传承为研究脉络,以取得监测的实际效能为落脚点,解析... 详细信息

学生体质健康事关全民福祉与其个人长远发展,是衡量人才培养质量的重要标准。该文运用文献资料、数理统计与归纳演绎等方法,以做好学生体质健康监测工作的现实需要为论述基础,以理念传承为研究脉络,以取得监测的实际效能为落脚点,解析中山大学以“体能提高班”为建设基石的学生体质健康监测实施路径、方法与成效,以期为相关学校提供可参考、可借鉴的实际案例,从而助益我国青少年体质健康监测工作的实际效能提高与高质量发展。

关键词：体质监测训导健康促进理念体能提高班

Nucleation and growth of Fe-rich phases in Al-5Ti-1B modified Al-Fe alloys investigated using synchrotron X-ray imaging and electron microscopy

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Journal of Materials Science & Technology 2021年第21期80卷 84-99页

作者： Yuliang Zhao Weiwen Zhang Dongfu Song Bo Lin Fanghua Shen donghai Zheng ChunXiao Xie Zhenzhong sun Yanan Fu Runxia Li Neutron Scattering Technical Engineering Research Centre School of Mechanical EngineeringDongguan University of TechnologyDongguan523808China Guangdong-Hong Kong-Macao Joint Laboratory for Neutron Scattering Science and Technology Dongguan University of TechnologyDongguan523808China National Engineering Research Centre of Near-net-shape Forming for Metallic Materials South China University of TechnologyGuangzhou510641China Guangdong Institute of Materials and Processing Guangdong Acadamy of ScienceGuangzhou510650China School of Mechanical Engineering Guizhou UniversityGuiyang550025China Shanghai Synchrotron Radiation Facility.Shanghai Advanced Research Institute CASShanghai201204China School of Materials Science and Engineering Dongguan University of TechnologyDongguan523808China

Plate-like Fe-rich intermetallic phases directly influence the mechanical properties of recycled Al alloys;thus, many attempts have been made to modify the morphology of these phases. Through synchrotron X-ray imaging and electron microscopy, the underlying nucleation and growth mechanisms of Fe-rich phases during the solidification of Al-5 Ti-1 B-modified Al-2 Fe alloys were revealed in this study. The results showed that the Al-5 Ti-1 B grain refiner as well as the applied pressure both resulted in reduction of the size and number of primary Al_(3)Fe phases and promoted the formation of eutectic Al_(6)Fe *** tomography results demonstrated that Al-5 Ti-1 B changed the three-dimensional(3 D) morphology of primary Fe-rich phases from rod-like to branched plate-like, while a reduction in their thickness and size was also observed. This was attributed to the fact that Ti-containing solutes in the melts inhibit the diffusion of Fe atoms and the Al_(3)Fe twins produce re-entrant corner on the twin boundaries along the growth direction. Moreover, the TiB_(2) provides possible nucleation sites for Al_6Fe phases. The nucleation mechanism of Fe-rich phases is discussed in terms of experimental observations and crystallography calculations. The decrease in the lattice mismatch between TiB_(2) and Al_(6)Fe phases was suggested, which promoted the transformation of Al_(3)Fe to Al_(6)Fe phases.

关键词： Al alloys Synchrotron X-ray imaging Fe-rich phases Grain refinement Nucleation and growth

Mesoscale Dynamics and Its Application in Torrential Rainfall Systems in China

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Advances in Atmospheric Sciences 2015年第2期32卷 192-205页

作者： GAO Shouting TAN Zhemin ZHAO Sixiong LUO Zhexian LU Hancheng WANG donghai CUI Chunguang CUI Xiaopeng sun Jianhua Laboratory of Cloud-precipitation Physics and Severe Storms Institute of Atmospheric PhysicsChinese Academy of Sciences Department of Atmospheric Sciences Nanjing University Remote Sensing College Nanjing University of Information Science & Technology Meteorological College PLA University of Science and Technology Chinese Academy of Meteorological Sciences Institute of Heavy Rain China Meteorological Administration

Progress over the past decade in understanding moisture-driven dynamics and torrential rain storms in China is reviewed in this paper. First, advances in incorporating moisture effects more realistically into theory are described, including the development of a new parameter, generalized moist potential vorticity（GMPV） and an improved moist ageostrophic Q vector（Qum）. Advances in vorticity dynamics are also described, including the adoption of a ＂parcel dynamic＂ approach to investigate the development of the vertical vorticity of an air parcel; a novel theory of slantwise vorticity development, proposed because vorticity develops easily near steep isentropic surfaces; and the development of the convective vorticity vector（CVV）as an effective new tool. The significant progress in both frontal dynamics and wave dynamics is also summarized, including the geostrophic adjustment of initial unbalanced flow and the dual role of boundary layer friction in frontogenesis, as well as the interaction between topography and fronts, which indicate that topographic perturbations alter both frontogenesis and frontal structure. For atmospheric vortices, mixed wave/vortex dynamics has been extended to explain the propagation of spiral rainbands and the development of dynamical instability in tropical cyclones. Finally, we review wave and basic flow interaction in torrential rainfall, for which it was necessary to extend existing theory from large-scale flows to mesoscale fields, enriching our knowledge of mesoscale atmospheric dynamics.

关键词： mesoscale dynamics torrential rainfall moist atmosphere vorticity dynamics wave-flow interaction

现代体育推进农民市民化的基本逻辑、现实困境与实践路径

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北京体育大学学报 2024年第6期47卷 28-39页

作者：隋志宇武东海郝光安崔雪梅仲恺农业工程学院体育学院广东广州510225 中山大学体育部广东广州510275 北京大学体育教学部北京100871 廊坊师范学院体育发展研究中心河北廊坊065000

农民的市民化是中国式现代化建设的重要任务,现代体育作为人的现代化教育的重要手段,对推进农民市民化具有重要的价值和意义。使用文献资料、逻辑分析等方法探讨现代体育推进农民市民化的基本逻辑,剖析现代体育推进农民市民化的现实困... 详细信息

农民的市民化是中国式现代化建设的重要任务,现代体育作为人的现代化教育的重要手段,对推进农民市民化具有重要的价值和意义。使用文献资料、逻辑分析等方法探讨现代体育推进农民市民化的基本逻辑,剖析现代体育推进农民市民化的现实困境并针对性提出实践路径。研究发现,现代体育推进农民市民化是现代城市体育和农村体育各自行为并协同作用于农民市民化的过程,两者相互联系、密不可分。据此逻辑研究探明现代体育推进农民市民化存在价值偏移、融入受限、效能受缚、协同不足的现实困境。研究认为,现代体育可以从调和价值、加强融入、转变功能、增进协同4方面促进农民的市民化。通过研究期望为我国农民的市民化提供体育知识和实践路径,并为现代体育参与中国式现代化建设提供有益参考。

关键词：农民现代化现代体育中国式现代化城乡体育农民市民化

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67份匍匐型花生种质资源遗传多样性分析

新疆农业科学 2024年第1期61卷 42-54页

作者：汪天玲侯献飞施俊杰孙全喜贾东海顾元国单世华苗昊翠李强新疆农业科学院农作物品种资源研究所乌鲁木齐830091 新疆农业科学院经济作物研究所乌鲁木齐830091 山东省花生研究所山东青岛266100

【目的】分析匍匐型花生种质资源的遗传多样性,为挖掘花生资源中的有利基因提供参考。【方法】统计分析67份匍匐型花生质量性状和农艺性状的遗传参数,利用近红外光谱法对参试材料品质进行测定。【结果】在6个质量性状中,遗传多样性指数... 详细信息

【目的】分析匍匐型花生种质资源的遗传多样性,为挖掘花生资源中的有利基因提供参考。【方法】统计分析67份匍匐型花生质量性状和农艺性状的遗传参数,利用近红外光谱法对参试材料品质进行测定。【结果】在6个质量性状中,遗传多样性指数变幅在0.08~1.14,在11个数量性状中,总分枝数的遗传多样性指数最低,为3.55,单株产量和百仁重的遗传多样性指数最高,均为4.20。总分枝数的变异系数最大,为46.40%。前4个主成分的累计贡献率为70.30%。将67份供试材料聚为三类,第Ⅰ类群蛋白质、含油量及亚油酸含量处于较高水平,第Ⅱ类群整体性状指标良好,特别是平均单株产量高达77.01g,第Ⅲ类群的油酸含量最高。【结论】67份匍匐型花生种质资源具有丰富的遗传多样性,农艺性状改良潜力较大。

关键词：匍匐型花生种质资源遗传多样性指数差异性分析聚类分析

In-situ growth of TiO_(2)film on carbonized eggshell membrane as 3D electrode for high-performance lithium storage

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Green Energy & Environment 2022年第3期7卷 485-491页

作者： Xiao Yu Xinyi Zhang Yongjian Lai donghai Wang Yong Liu School of Materials Science and Engineering State Key Laboratory of Optoelectronic Materials and TechnologiesSun Yat-sen UniversityGuangzhou510275China School of Electronics and Information Technology Sun Yat-sen UniversityGuangzhou510275China

3D electrodes have shown extraordinary promise for electrochemical energy storage devices in wearable ***,it is still a significant challenge to rationally design 3D electrode that has the characteristics of lightweight,flexibility,low cost,high performance and *** this work,we present a novel design of 3D electrode by directly growing the nanocrystalline TiO_(2) film on carbonized eggshell *** unique architecture can supply not only a continuous electron transport pathway through an interconnected carbon fibrous network but also an efficient electrolyte flux via an interpenetrating porous ***,nanocrystalline TiO_(2) film on carbonized eggshell membrane offers a short ion diffusion path in the solid-phase,leading to a rapid kinetic of electrochemical *** tested as an anode for Li-ion battery,TiO_(2) film in 3D electrode demonstrated excellent electrochemical performance with a large reversible capacity,excellent rate capacity and long life cycling property.

关键词： property reaction electrode