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Atomically dispersed hierarchically ordered porous Fe-N-C single-atom nanozymes for dyes degradation

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Nano Research 2023年第8期16卷 10840-10847页

作者： Shuangli wu Weiwei wu Xinyang Zhu Minghua Li Jianguo Zhao Shaojun Dong Changchun State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China University of Science and Technology of China Hefei 230026China College of Chemistry Jilin UniversityChangchun 130012China

The development of novel nanozymes for environmental contamination remediation is a worthwhile research ***,most of the reported nanozymes cannot degrade efficiently due to the limitation of the internal active sites not being able to come into direct contact with ***,we reported Fe-N-C single-atom nanozymes(SAzymes)with atomically dispersed FeN4 active sites anchored on a three-dimensional hierarchically ordered microporous-mesoporous-macroporous nitrogen doped carbon matrix(3DOM Fe-N-C)for the degradation of a targeted environmental pollutant(rhodamine B(RhB)).The three-dimensional(3D)hierarchically ordered porous structure may accelerate mass transfer and improve the accessibility of active *** structure and high metal atom utilization endow Fe-N-C SAzyme with enhanced tri-enzyme-mimic activities,comprising oxidase-mimic,peroxidase-mimic,and catalase-mimic *** on its excellent peroxidase-mimic activity,3DOM Fe-N-C can degrade RhB by hydroxyl radicals(·OH)generated in the presence of hydrogen *** study provides a new idea for designing porous Fe-N-C SAzymes for environmental contamination remediation.

关键词： single-atom nanozymes(SAzymes) metal organic frameworks(MOFs) hierarchically ordered porous structure trienzyme mimics environmental contamination remediation

NaV6O15:A promising cathode material for insertion/extraction of Mg^2+with excellent cycling performance

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Nano Research 2020年第2期13卷 335-343页

作者： Dongzheng wu Jing Zeng Haiming Hua Junnan wu Yang Yang Jinbao Zhao Collaborative Imnovation Center of Chemistry for Energy Materials State Key Lab of Physical Chemistry of Solid SurfacesState Province Joint Engineering Laboratory of Power Source Technology for New Energy VehicleEngineering Research Center of Electrochemical TechnologyMinistry of EducationCollege of Chemistry and Chemical Engineering Xiamen UniversityXiamen 361005China School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006China

The rechargeable magnesium batteries(RMBs)are getting more and more attention because of their high-energy density,high-security and ***,the high charge density of Mg^2+makes the diffusion of Mg2+in the conventional cathodes very slow,resulting in a lack of appropriate electrode materials for *** this work,we enlarge the layer spacing of V2Os by introducing Na^2+in the crystal structure to promote the diffusion kinetics of Mg^2+.The NaVeO15(NVO)synthesized by a facile method is studied as a cathode material for RMBs with the anhydrous pure Mg^2+*** a result,the NVO not only exhibits high discharge capacity(119.2 mAh:g^-1 after 100 cycles at the current density of 20 mA:g^-1)and working voltage(above 1.6 V ***^2+/Mg),but also expresses good rate ***,the eX-situ characterizations results reveal that the Mg^2+storage mechanism in NVO is based on the intercalation and *** density functional theory(DFT)calculation results further indicate that Mg^2+tends to occupy the semi-occupied sites of Na^+in the ***,the galvanostatic intermittent titration technique(GITT)demonstrates that NVO electrode has the fast diffusion kinetics of Mg^2+during discharge process ranging from 7.55×10^-13 to2.41×10^-11 cm^2·s^-*** work proves that the NVO is a potential cathode material for RMBs.

关键词： NaV6O15 alkali metal pre-intercalation rechargeable magnesium battery cathode electrochemical mechanism

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单光子激光与中波红外共口径探测光学系统

光学精密工程 2021年第6期29卷 1260-1269页

作者：吴洪波张新王灵杰闫磊史广维中国科学院长春光学精密机械与物理研究所吉林长春130033 中国科学院大学北京100049

为了实现对远距离民航飞机目标的探测、跟踪和测距,设计并研制了一套单光子激光与中波红外共口径探测光学系统。阐述了激光/红外共口径探测系统的工作原理和单光子激光测距原理,对目标辐射特性、系统作用距离及口径等进行了分析。采用R-... 详细信息

为了实现对远距离民航飞机目标的探测、跟踪和测距,设计并研制了一套单光子激光与中波红外共口径探测光学系统。阐述了激光/红外共口径探测系统的工作原理和单光子激光测距原理,对目标辐射特性、系统作用距离及口径等进行了分析。采用R-C光学系统型式,通过次镜进行分色,实现激光和中波红外双波段光学系统的汇聚光路分色设计。在单光子激光光路中设置小孔光阑,通过仿真分析验证了小孔光阑的杂光抑制能力。通过高精度装调和视轴标定,激光/红外共口径探测系统具备良好的成像质量,中波光路实测调制传递函数达0.28(@20 lp/mm)。利用原理样机完成了对民航飞机的外场探测实验,实验结果表明,该系统可实现对远距离民航飞机的有效探测和跟踪,探测距离达225 km以上,可满足航空、航天及地面探测领域对远距离目标的预警探测和测距需求。

关键词：光学系统设计单光子激光中波红外共口径小孔光阑远距离探测

Acute aortic dissection mimicking acute myelopathies: a case report

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Journal of Translational Neuroscience 2023年第2期8卷 26-30页

作者： jie Chen Chuanjie wu Shize Li Kefang Zhang Department of Neurology Zhengzhou Central Hospital Affiliated to Zhengzhou UniversityZhengzhou 450000China Department of Neurology Xuanwu HospitalCapital Medical UniversityBeijing 100053China

Myelopathy is a common etiology of acute bilateral limb weakness. While painless acute aortic dissection(AAD)is the most common catastrophic event that can mimic myelopathic manifestations of acute bilateral limb weakness, it is often easily ignoredWe describe a case of painless AAD in a 70-year-old man with a history of hypertension manifesting as acute myelopathy(bilateral limb weakness and loss of all types of sensation)with increased levels of serum myoglobin and *** resonance imaging of the spinal cord revealed a normal thoracic and lumbar spinal cord but a dissection of the thoracic aorta. Computed tomography angiography of the chest and abdominal aorta showed a Stanford type B dissection extending throughout the thoracic aorta and into the abdominal aorta *** patient died because of a sudden drop in blood pressure during transfer to vascular *** clinical presentation of painless AAD mimics *** dissection should be considered in patients presenting with acute bilateral limb *** examination of the skin temperature,dorsalis pedis artery,serum D-dimer,and myocardial markers can provide diagnostic clues.

关键词： painless aortic dissection bilateral limb weakness myelopathies spinal cord myoglobin D-dime magnetic resonance imaging

流动注射化学发光法及光度法用于巴戟天提取液抗氧化活性的研究

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光谱学与光谱分析 2006年第9期26卷 1688-1691页

作者：吴拥军石杰屈凌波李斐菲李晓静吴逸明郑州大学公共卫生学院河南郑州450052 郑州大学化学系河南郑州450052

将中药巴戟天提取液加入鲁米诺-H2O2-CuSO4化学发光体系,测量其发光强度,根据系统化学发光被抑制的程度可以评价巴戟天的抗氧化活性,并将巴戟天与抗坏血酸的抗自由基活性进行了对比实验,实验证明巴戟天提取液具有明显的抗自由基活性;采... 详细信息

将中药巴戟天提取液加入鲁米诺-H2O2-CuSO4化学发光体系,测量其发光强度,根据系统化学发光被抑制的程度可以评价巴戟天的抗氧化活性,并将巴戟天与抗坏血酸的抗自由基活性进行了对比实验,实验证明巴戟天提取液具有明显的抗自由基活性;采用分光光度法测定体系吸光度的变化来研究巴戟天对OH.及O2-.自由基的清除作用,以抗坏血酸作阳性对照,结果发现:巴戟天对OH.及O2-.自由基均有良好的清除作用,结果较为满意。提示中药巴戟天可作为潜在的具有抗氧化活性的天然药物。

关键词：流动注射化学发光法光度法巴戟天提取液抗氧化活性

Adsorption performance of CMK-3 and C-FDU-15 in NO removal at low temperature

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Journal of Environmental Sciences 2020年第1期32卷 289-298页

作者： Runping wu Qing Ye Kai wu Shuiyuan Cheng Tianfang Kang Hongxing Dai Key Laboratory of Beijing on Regional Air Pollution Control Department of Environmental ScienceCollege of Environmental and Energy EngineeringBeijing University of TechnologyBeijing 100124China Beijing Key Laboratory for Green Catalysis and Separation Key Laboratory of Beijing on Regional Air Pollution ControlKey Laboratory of Advanced Functional MaterialsEducation Ministry of Chinaand Laboratory of Catalysis Chemistry and NanoscienceDepartment of Chemistry and Chemical EngineeringCollege of Environmental and Energy EngineeringBeijing University of TechnologyBeijing 100124China

CMK-3 and C-FDU-15 samples were synthesized using hard-templating and evaporationinduced self-assembly(EISA)methods,*** pore structures of CMK-3 and CFDU-15 as well as commercial activated carbon were characterized by means of X-ray diffraction,field emission scanning electron microscopy,transmission electron microscopy,and N2 adsorption–*** of NO was investigated by means of thermogravimetric analysis,temperature-programmed desorption of NO+O2,and in situ diffuse reflectance Fourier transform infrared *** results show that the CMK-3 and C-FDU-15 materials possessed ordered and uniform *** coadsorption capacity of NO and O2 decreased in the sequence CMK-3(88.6 mg/g)>C-FDU-15(71.7 mg/g)>AC(25.3 mg/g).There were two main adsorption species on CMK-3 and CFDU-15:nitrite and *** is converted to nitrate ***,the adsorption species were more complex on AC,with nitrite being the main ***,CMK-3 and C-FDU-15 exhibit excellent regeneration efficiency compared with *** excellent NO adsorption performance of CMK-3 and C-FDU-15 was associated with their ordered mesoporous structures and high surface *** research provides more options for NO adsorption in the future.

关键词： Ordered mesoporous carbon material CMK-3 C-FDU-15 NO adsorption species Regeneration performance

Recent progress and perspectives on silicon anode:Synthesis and prelithiation for LIBs energy storage

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Journal of Energy Chemistry 2022年第1期31卷 615-650,I0016页

作者： Yuanxing Zhang Borong wu Ge Mu Chengwei Ma Daobin Mu Feng wu School of Materials Science and Engineering Beijing Institute of TechnologyBeijing Key Laboratory of Environment Science and EngineeringBeijing 100081China Collaborative Innovation Center of Electric Vehicles in Beijing Beijing 100081China

The ever-increasing environmental/energy crisis as well as the rapid upgrading of mobile devices had stimulated intensive research attention on promising alternative energy storage and conversion *** these devices,alkali metal ion batteries,such as lithium-ion batteries(LIBs) had attracted increasing research attention due to its several advantages including,environmental friendliness,high power density,long cycle life and excellent *** had been widely used in consumer electronics,electric vehicles,and large power grids et ***-based(silicon and their oxides,carbides) anodes had been widely *** several advantages including low cost,high theoretical capacity,natural abundance,and environmental friendliness,which shows great potential as anodes of *** this review,we summarized the recently progress in the synthetic method of silicon matrix *** empirical method for prelithiation of silicon-based materials were also ***,we also reviewed some novel characterization ***,the new design,preparation methods and properties of these nano materials were reviewed and *** hoped that this review can provide a general overview of recent progress and we briefly highlighted the current challenges and prospects,and will clarify the future trend of silicon anode LIBs research.

关键词： Si anodes Lithium-ion batteries Prelithiation Characterization Energy storage and conversion

Intelligent Orchestrating of IoT Microservices Based on Reinforcement Learning

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Chinese Journal of Electronics 2022年第5期31卷 930-937页

作者： wu Yuqin SHEN Congqi CHEN Shuhan wu Chunming LI Shunbin WEI Ruan College of Computer Science and Technology Zhejiang University College of Information and Electrical Engineering Ningde Normal University Zhejiang Lab College of Control Science and Engineering Zhejiang University

With the recent increase in the number of Internet of things(IoT) services, an intelligent scheduling strategy is needed to manage these services. In this paper, the problem of automatic choreography of microservices in IoT is explored. A type of reinforcement learning(RL) algorithm called TD3 is used to generate the optimal choreography policy under the framework of a softwaredefined network. The optimal policy is gradually reached during the learning procedure to achieve the goal, despite the dynamic characteristics of the network environment. The simulation results show that compared with other methods, the TD3 algorithm converges faster after a certain number of iterations, and it performs better than other non-RL algorithms by obtaining the highest reward. The TD3 algorithm can effciently adjust the traffic transmission path and provide qualified IoT services.

关键词： software-defined network telecommunication scheduling intelligent orchestrating nonRL algorithms reinforcement learning software defined networking optimal choreography policy reinforcement learning algorithm Internet of things services network environment IoT microservices TD3 algorithm traffic transmission path Internet of Things qualified IoT services intelligent scheduling strategy dynamic characteristics

Graph neural network-based scheduling for multi-UAV-enabled communications in D2D networks

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Digital Communications and Networks 2024年第1期10卷 45-52页

作者： Pei Li lingyi Wang Wei wu Fuhui Zhou Baoyun Wang Qihui wu Nanjing University of Posts and Telecommunications Nanjing210023China Nanjing University of Aeronautics and Astronautics Nanjing210016China

In this paper,we jointly design the power control and position dispatch for Multi-Unmanned Aerial Vehicle(UAV)-enabled communication in Device-to-Device(D2D)*** objective is to maximize the total transmission rate of Downlink Users(DUs).Meanwhile,the Quality of Service(QoS)of all D2D users must be *** comprehensively considered the interference among D2D communications and downlink *** original problem is strongly non-convex,which requires high computational complexity for traditional optimization *** to make matters worse,the results are not necessarily globally *** this paper,we propose a novel Graph Neural Networks(GNN)based approach that can map the considered system into a specific graph structure and achieve the optimal solution in a low complexity ***,we first construct a GNN-based model for the proposed network,in which the transmission links and interference links are formulated as vertexes and edges,***,by taking the channel state information and the coordinates of ground users as the inputs,as well as the location of UAVs and the transmission power of all transmitters as outputs,we obtain the mapping from inputs to outputs through training the parameters of *** results verified that the way to maximize the total transmission rate of DUs can be extracted effectively via the training on ***,it also shows that the performance of proposed GNN-based method is better than that of traditional means.

关键词： Unmanned aerial vehicle D2 Dcommunication Graph neural network Power control Position planning