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Hierarchical Interconnected NiMoN with Large Specific Surface Area and High Mechanical Strength for Efficient and Stable Alkaline Water/Seawater Hydrogen Evolution

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Nano-Micro Letters 2023年第9期15卷 520-535页

作者： minghui ning Yu Wang Libo Wu Lun Yang Zhaoyang Chen Shaowei Song Yan Yao Jiming Bao Shuo Chen Zhifeng Ren Department of Physics and Texas Center for Superconductivity at the University of Houston(TcSUH) University of HoustonHoustonTX 77204USA Cullen College of Engineering and TcSUH University of HoustonHoustonTX 77204USA School of Materials Science and Engineering Hubei Normal UniversityHuangshi 435002HubeiPeople’s Republic of China Department of Electrical and Computer Engineering and TcSUH University of HoustonHoustonTX 77204USA

NiMo-based nanostructures are among the most active hydrogen evolution reaction(HER)catalysts under an alkaline environment due to their strong water dissociation ***,these nanostructures are vulnerable to the destructive effects of H_(2) production,especially at industry-standard current ***,developing a strategy to improve their mechanical strength while maintaining or even further increasing the activity of these nanocatalysts is of great interest to both the research and industrial ***,a hierarchical interconnected NiMoN(HW-NiMoN-2h)with a nanorod-nanowire morphology was synthesized based on a rational combination of hydrothermal and water bath ***-NiMoN-2h is found to exhibit excellent HER activity due to the accomodation of abundant active sites on its hierarchical morphology,in which nanowires con-nect free-standing nanorods,concurrently strengthening its structural stability to withstand H_(2) production at 1 A cm^(−2).Seawater is an attractive feedstock for water electrolysis since H_(2) generation and water desalination can be addressed simultaneously in a single *** HER performance of HW-NiMoN-2h in alkaline seawater suggests that the presence of Na+ions interferes with the reation kinetics,thus lowering its activity ***,benefiting from its hierarchical and interconnected characteristics,HW-NiMoN-2h is found to deliver outstanding HER activity of 1 A cm^(−2) at 130 mV overpotential and to exhibit excellent stability at 1 A cm^(−2) over 70 h in 1 M KOH seawater.

关键词： Hydrogen evolution reaction(HER) Nanoarchitecture NiMo catalysts Direct seawater electrolysis Nanostructural stability

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柯氏模型在国内新入职护士培训效果评价中的应用进展

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循证护理 2023年第7期9卷 1216-1218页

作者：宁铭慧周梓轩高桂英闫桂虹天津中医药大学研究生院天津301617 天津医院

综述柯氏评估模型的概念、方法、衍生的新模型及在新入职护士培训中的运用,以期为提升新入职护士的综合素质、操作技能、护理质量提供参考。

关键词：柯氏模型新入职护士培训综述护理

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量化参数对H.266压缩标准4K视频质量影响实验

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实验科学与技术 2024年第3期22卷 9-14页

作者：金伟正宁明慧王欣然梁芳武汉大学电子信息学院武汉430072

多功能视频编解码方式(H.266/VVC)在每一个编码环节上都采取了多项改进措施,诸多措施的总体效果使其编码效率比高效视频编码方式(HEVC)提高了一倍。该文对几种动态情况各异的视频序列(*.yuv)采用H.266编解码器进行压缩和解压,通过改变... 详细信息

多功能视频编解码方式(H.266/VVC)在每一个编码环节上都采取了多项改进措施,诸多措施的总体效果使其编码效率比高效视频编码方式(HEVC)提高了一倍。该文对几种动态情况各异的视频序列(*.yuv)采用H.266编解码器进行压缩和解压,通过改变量化参数(QP)取值,研究在不同比特率条件下,视频压缩后编码效率和时间损耗的差异。实验表明,对于较低的比特率和4K视频常用的比特率(20 Mbps)附近,在编码效率和峰值信噪比上都有着很大的优势,但在超大比特率的情况下,两者表现近乎相同。对时间倍数和码率节省进行计算后发现,每个视频序列的结果差距较大,说明编码复杂度和编码性能与选取的视频序列本身有很大关系。H.266对复杂度较高的视频序列提升明显,编码复杂度有了显著提升,在某些比特率的情况下甚至可达到100倍之多,H.266同时对硬件的算力带来了很大挑战,需要在之后进行进一步优化。

关键词：多功能视频编解码方式 4K/超高清视频量化参数峰值信噪比

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Learning-based user association and dynamic resource allocation in multi-connectivity enabled unmanned aerial vehicle networks

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Digital Communications and Networks 2024年第1期10卷 53-62页

作者： Zhipeng Cheng minghui Liwang ning Chen Lianfen Huang Nadra Guizani Xiaojiang Du Department of Information and Communication Engineering Xiamen UniversityXiamen361005China School of Electrical and Computer Engineering University of Texas at ArlingtonArlingtonTX76019USA Department of Electrical and Computer Engineering Stevens Institute of TechnologyHobokenNJ07030USA

Unmanned Aerial Vehicles(UAvs)as aerial base stations to provide communication services for ground users is a flexible and cost-effective paradigm in ***,dynamic resource allocation and multi-connectivity can be adopted to further harness the potentials of UAVs in improving communication capacity,in such situations such that the interference among users becomes a pivotal disincentive requiring effective *** this end,we investigate the Joint UAV-User Association,Channel Allocation,and transmission Power Control(J-UACAPC)problem in a multi-connectivity-enabled UAV network with constrained backhaul links,where each UAV can determine the reusable channels and transmission power to serve the selected ground *** goal was to mitigate co-channel interference while maximizing long-term system *** problem was modeled as a cooperative stochastic game with hybrid discrete-continuous action space.A Multi-Agent Hybrid Deep Reinforcement Learning(MAHDRL)algorithm was proposed to address this *** simulation results demonstrated the effectiveness of the proposed algorithm and showed that it has a higher system utility than the baseline methods.

关键词： UAV-user association Multi-connectivity Resource allocation Power control Multi-agent deep reinforcement learning

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High-quality graphene grown directly on stainless steel meshes through CVD process for enhanced current collectors of supercapacitors

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Science China(Technological Sciences) 2014年第2期57卷 259-263页

作者： ning Jing HAO Long ZHANG XianFeng LIANG minghui ZHI LinJie National Center for Nanoscience and Technology University of Chinese Academy of Sciences School of Materials Science and Engineering University of Shanghai for Science and Technology

High-quality graphene coating was directly grown on stainless steel meshes via chemical vapor deposition process,during which the morphology of the stainless steel was transformed *** the graphene-coated stainless steel meshes were applied as current collectors of supercapacitors,the changes of the appearance and the graphene coating improved the contact between stainless steel meshes and the active materials,thus benefiting the performance of the ***,this simple method can be used to prepare the enhanced current collectors for other energy storage devices.

关键词： graphene current collector supercapacitor chemical vapor deposition (CVD)

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Cycle stability of lithium/garnet/lithium cells with different intermediate layers

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Rare Metals 2018年第6期37卷 473-479页

作者： ning Zhao Rui Fang minghui He Cheng Chen YiQiu Li ZhiJie Bi Xiang-Xin Guo College of Physics Qingdao University Qingdao 266071 China University of Chinese Academy of Sciences Beijing 100039China State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of Sciences Shanghai 200050 China

The garnet-type electrolytes such as Ta-doped Li7La3Zr2Ol2 （LLZTO） have been viewed as the promising electrolytes for solid-state lithium batteries, but it exhibits problem of high interfacial resistance （1960 Ω·cm^2） and short circuit when being cycled in Li/LLZTO/Li cells at the current density above 0.5 mA·cm^-2. Introduction of intermediate layers in between lithium and LLZTO is helpful for decreasing the interfacial resistance and suppressing the growth of lithium dendrites. In this work, three kinds of intermediate layers of Au, Nb and Si with the thickness of 100 nm were prepared. Although the interfacial resistance with the Au layer decreases from 1960 to 32 Ω·cm^2, the cells can only cycle for 0.67 h at 0.5 mA·cm^-2, related to the Au peeled off from the LLZTO. The Nb layers lead to the initial interfacial resistance of 14 Ω·cm^2, while showing extension of cycle time to 50 h with the increase in interracial resistance due to the formation of the resistive Li-Nb-O phase. The Si layers induce the interfacial resistance as low as 5 Ω·cm^2 and the cycles as long as 120 h, which is attributed to the improvement in electrical contact between Li and electrolyte as well as the maintenance of conductive interface during cycles.

关键词： Solid-state batteries Garnet electrolytes Lithium dendrites Intermediate layers Interfaces

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Recent advances on the construction of encapsulated catalyst for catalytic applications

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Nano Research 2023年第2期16卷 3451-3474页

作者： minghui Li Yaning Yang Dailiang Yu Wenwen Li Xin ning Rui Wan Hongjie Zhu Junjie Mao School of Ecology and Environment Anhui Normal UniversityWuhu 241002China Key Laboratory of Functional Molecular Solids Ministry of EducationCollege of Chemistry and Materials ScienceAnhui Normal UniversityWuhu 241002China College of Environmental Science and Engineering Yangzhou UniversityYangzhou 225127China Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology School of Chemistry and Chemical EngineeringLiaocheng UniversityLiaocheng 252059China

In heterogeneous catalytic reactions,supported metal catalysts have attracted increasing attention for the environmental remediation and industrial manufacture due to their inherent catalytic ***,leaching,agglomeration,and poisoning of active metal particles lead to catalyst deactivation,thereby limiting their *** avoid this,strategies to protect the active metals from such inactivating processes are major areas of *** encapsulation strategies,in which active species are coated by protective shells,have proven to be a powerful technology to enhance catalytic performance by creating a well-developed structure about the active catalytic *** review highlights the recent advances on preparation method and application of encapsulated catalysts since *** upon the traditional confinement effect,new categories and extended concepts of encapsulation are *** parallel,effects of encapsulation structure on performance and key factors controlling the structure of encapsulated catalyst are discussed definitely in this ***,future perspectives on opportunities and challenges for further research in the field are given at the end of this paper.

关键词： heterogeneous catalysis encapsulated catalyst catalyst design deactivation catalytic performance

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Late-stage modification of bioactive compounds:Improving druggability through efficient molecular editing

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Acta Pharmaceutica Sinica B 2024年第3期14卷 1030-1076页

作者： Tongyu Huo Xinyi Zhao Zengrui Cheng Jialiang Wei minghui Zhu Xiaodong Dou ning Jiao State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical SciencesPeking UniversityBeijing 100191China Changping Laboratory Beijing 102206China Shanghai Key Laboratory of Green Chemistry and Chemical Processes East China Normal UniversityShanghai 200062China

Synthetic chemistry plays an indispensable role in drug discovery,contributing to hit compounds identification,lead compounds optimization,candidate drugs preparation,and so *** Nobel Prize laureate James Black emphasized,“the most fruitful basis for the discovery of a new drug is to start with an old drug”***-stage modification or functionalization of drugs,natural products and bioactive compounds have garnered significant interest due to its ability to introduce diverse elements into bioactive compounds *** modifications alter the chemical space and physiochemical properties of these compounds,ultimately influencing their potency and *** enrich a toolbox of chemical modification methods for drug discovery,this review focuses on the incorporation of halogen,oxygen,and nitrogen—the ubiquitous elements in pharmacophore components of the marketed drugs—through late-stage modification in recent two decades,and discusses the state and challenges faced in these *** also emphasize that increasing cooperation between chemists and pharmacists may be conducive to the rapid discovery of new activities of the functionalized ***,we hope this review would serve as a valuable resource,facilitating the application of late-stage modification in the construction of novel molecules and inspiring innovative concepts for designing and building new drugs.

关键词： Late-stage modification Drug space Halogenation Oxygenation Nitrogenation Synthetic chemistry

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Current situation and forecast of environmental risks of a typical lead-zinc sulfide tailings impoundment based on its geochemical characteristics

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Journal of Environmental Sciences 2020年第7期32卷 120-128页

作者： Tao Chen Zi-Ang Yan Damao Xu minghui Wang Jian Huang Bo Yan Xianming Xiao Xunan ning SCNU Environmental Research Institute Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety&MOE Key Laboratory of Environmental Theoretical ChemistrySouth China Normal UniversityGuangzhou 510006China School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510640China State Key Laboratory of Organic Geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China China University of Geosciences Beijing 100083China

The potential environmental implications of a Pb(Lead)-Zn(Zinc)sulfide tailing impoundment were found to be dependent on its geochemical *** typical lead-zinc sulfide tailing impoundment was *** boreholes were set with the grid method and 36 tailings were sampled and *** to the results of metal content analysis,the tailing samples contained considerably high contents of heavy metals,ranging from 6.99 to 89.0 mg/kg for Cd,75.3 to 602 mg/kg for Cu,0.53%to 2.63%for Pb and 0.30%to 2.54%for *** of the heavy metals in the sample matrix showed a uniform concentration distribution,except ***,Pb,Zn,and Mn were associated with each other,and were considered to be the dominant contributors based on hierarchical cluster ***,SEM and XPS were employed for evaluation of the tailing weathering characteristics,confirming that the tailings had undergone intensive *** maximum potential acidity of the tailings reached 244 kg H2SO4/ton;furthermore,the bioavailability of heavy metals like Pb,Cd,Cr,Cu,and Zn was 37.8%,12.9%,12.2%,5.95%,and 5.46%*** metals would be potentially released into drainage by the weathering *** of a gastrointestinal model showed that Pb,Cr,Ni and Cu contained in the tailings were high-risk ***,control of the heavy metals’migration and their environmental risks should be planned from the perspective of geochemistry.

关键词： Pb-Zn tailings impoundment Geochemical characteristics Distribution of the metals Weathering process Environmental risk assessment

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Slip-draft embedded control system by adaptively adjusting the battery position for electric tractor

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International Journal of Agricultural and Biological Engineering 2023年第5期16卷 155-164页

作者： minghui Wang Pucai ning Ke Su Gejima Yoshinori Wei Wang Yongjie Cui Gongpei Cui College of Mechanical and Electronic Engineering Northwest A&F UniversityYangling 712100ShaanxiChina SAIC Motor Technical Center Shanghai 201804China School of Arts and Design Qilu University of Technology(Shandong Academy of Sciences)Jinan 250353China Faculty of Agriculture.University of Miyazaki Miyazaki 8892192Japan Key Laboratory of Agricultural Internet of Things Ministry of Agriculture and Rural AffairsYangling 712100ShaanxiChina Shaanxi Key Laboratory of Agricultural Information Perception and Intelligent Service Yangling 712100ShaanxiChina College of Mechanical&Electrical Engineering Henan Agricultural UniversityZhengzhou 450002China

A slip-draft embedded control system was designed and developed for an independent developed 2WD(two-wheel drive)electric tractor,to improve the traction efficiency,operation performance and ploughing depth stability of the electric *** this system,the battery of electric tractor was innovatively equivalent to the original counterweight of the fuel *** through dynamic analysis of electric tractor during ploughing,the mathematical model of adjusting the center of gravity about draft force and slip rate was *** the automatic adjustment of the center of gravity for electric tractor was realized through the adaptive adjustment of battery ***,the system was carried on electric tractor for performance evaluation under different ploughing conditions,the traction efficiency,slip rate and front wheel load of electric tractor were measured and controlled synchronously to make it close to the set *** the comparative experiments of ploughing operation were carried out under the two modes of adaptive adjustment of center of gravity and fixed center of *** test results showed that,based on the developed control system,the center of gravity of electric tractor can be adjusted in real time according to the complex changes of working *** ploughing operation with adjusting adaptively battery position,the average values of traction efficiency,slip rate,front wheel load and relative error of tillage depth of electric tractor were 64.5%,22.2%,2045.0 N and 2.0%*** were optimized by 15.0%,29.5%,19.6%and 80.0%respectively,compared with electric tractor with fixed battery *** slip-draft embedded control system can not only realize the adaptive adjustment of the center of gravity position in the ploughing process of electric tractor,but also improve the traction efficiency and the stability of ploughing depth,which can provide reference for the actual production operation of electric tractor.

关键词： electric tractor embedded control system adjusting adaptively center of gravity position performance test

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