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Science China Chemistry 2022年第7期65卷 1445-1452页

作者： Yanwei Zhu Xuxu Wang jianqiao shi Lang Gan Binbin Huang Li Tao Shuangyin Wang State Key Laboratory of Chemo/Bio-Sensing and Chemometrics College of Chemistry and Chemical EngineeringAdvanced Catalytic Engineering Research Center of the Ministry of EducationHunan UniversityChangsha 410082China College of Environmental science and Engineering Hunan UniversityChangsha 410082China

The rational structure design and active-site regulation of catalysts is crucial for high energy output. Herein, B, F co-doped Fe–N–C embedded in a flexible and free-standing hierarchical porous carbon framework(Fe–SA–FPCS) was reported. Owing to the synergism of optimized intrinsic activity, fast mass transfer and well exposed active sites, the Fe–SA–FPCS exhibits a high halfwave potential(E1/2=0.89 V vs. RHE) and small Tafel slope(66 m V dec^(-1)). Theoretical calculations uncover that B, F co-doping could accelerate the desorption of OH* on Fe sites, which can effectively increase oxygen reduction reaction activity. As the cathode for Zn–air batteries(ZABs), Fe–SA–FPCS demonstrates a high open-circuit voltage(1.51 V), large peak power density(168.4 m W cm^(-2)) and excellent stability. The assembled flexible solid-state ZAB exhibits excellent stability during charge and discharge cycling in the flat/bent state, and is promising for the application of portable and flexible devices. This work provides a new perspective for the fabrication of single-atom electrocatalysts with well-designed structure and excellent electrochemical energy conversion and storage capability.

关键词： Electrospinning single-atom catalysts oxygen reduction reaction hierarchical porous structure zinc–air battery

Understanding the surface segregation behavior of bimetallic CoCu toward HMF oxidation reaction

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Journal of Energy Chemistry 2022年第11期31卷 85-90,I0004页

作者： Yanwei Zhu jianqiao shi Yingying Li Yuxuan Lu Bo Zhou Shuangyin Wang Yuqin Zou State Key Laboratory of Chem/Bio-Sensing and Chemometrics Advanced Catalytic Engineering Research Center of the Ministry of EducationCollege of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082HunanChina School of Chemistry and Chemical Engineering Jishou UniversityJishou 416000HunanChina

Surface segregation is ubiquitous in multi-component materials and is of great important for catalysis but little is known on the surface structure under graphene ***,we show that the graphene encapsulated CoCu performs well for the electrocatalytic oxidation of 5-hydroxymethylfurfural(HMF)to2,5-furandicarboxylic acid(FDCA)with the onset potential before 1.23 VRHEand a nearly 100%selectivity of FDCA under 1.4 *** the experimental results,the unprecedented catalytic performance was attributed to local structural distortion and sub-nanometer lattice composition of the CoCu *** accurately show the dispersed Cu doped Co_(3)O_(4) nano-islands with a lot of edge sites on the bimetallic Co-Cu ***,the gradient components effectively facilitate the establishment of built-in electric field and accelerate the charge *** and experimental results reveal that the surface Co and neighbouring Cu atoms in sub-nanometer lattice synergistically promote the catalysis of *** work offers new insights into surface segregation in tuning the element spatial distribution for catalysis.

关键词： CoCu alloy Surface segregation Sub-nanometer lattice Electrocatalysis HMF oxidation

Migration and transformation of Pb,Cu,and Zn during co-combustion of high-chlorine-alkaline coal and Si/Al dominated coal

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Journal of Environmental Sciences 2024年第7期141卷 26-39页

作者： Jiangze Luo Qiwei Yang jianqiao Wang Boxiong Shen Zhuozhi Wang Qiqi shi Zhong Zhao Chao Huang Jie Xu Tianjin Key Laboratory of Clean Energy and Pollution Control School of Energy and Environmental EngineeringHebei University of TechnologyTianjin 300103China School of Chemical Engineering Hebei University of TechnologyTianjin 300103China

Shaerhu(SEH)coal is abundant in Xinjiang,*** utilization of SEH suffers from severe ash deposition,slagging,and fouling problems due to its high-chlorine-alkaline *** co-combustion of high-alkaline coal and other type coals containing high Si/Al oxides has been proven to be a simple and effective method that will alleviate ash-related problems,but the risk of heavy metals(HMs)contamination in this process is ***,the volatilization rates and chemical speciation of Pb,Cu,and Zn in co-combusting SEH and a high Si/Al oxides coal,i.e.,Yuanbaoshan(YBS)coal were investigated in this *** results showed that the addition of SEH increased the volatilization rates of Pb,Cu,and Zn during the co-combustion at 800℃from 23.70%,23.97%,and 34.98%to 82.31%,30.01%,and 44.03%,respectively,and promoted the extractable state of Cu and *** addition,the interaction between SEH and YBS inhibited the formation of the Pb residue ***-EDS mapping results showed that compared to Zn and Cu,the signal intensity of Pb was extremely weak in regions where some of the Si and Al signal distributions *** DFT results indicated that the O atoms of the metakaolin(Al_(2)O_(3)·2SiO_(2))(001)surface were better bound to the Zn and Cu than Pb atoms after adsorption of the chlorinated *** results contribute to a better understanding of the effects of high-alkaline coal blending combustion on Pb,Cu,and Zn migration and transformation.

关键词： Heavy metals High-chlorine-alkaline coal Coal blending combustion Density functional theory

Unraveling the electrophilic oxygen-mediated mechanism for alcohol electrooxidation on NiO

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National Science Review 2023年第5期10卷 251-261页

作者： Wei Chen jianqiao shi Chao Xie Wang Zhou Leitao Xu Yingying Li Yandong Wu Binbin Wu Yu-Cheng Huang Bo Zhou Ming Yang Jilei Liu Chung-Li Dong Tehua Wang Yuqin Zou Shuangyin Wang State Key Laboratory of Chemo/Bio-Sensing and Chemometrics College of Chemistry and Chemical EngineeringAdvanced Catalytic Engineering Research Center of the Ministry of EducationHunan University College of Chemistry and Chemical Engineering Hunan Normal University College of Materials Science and Engineering Hunan University Research Center for X-ray Science&Department of Physics Tamkang University Shenzhen Institute of Hunan University

Aqueous organic electrosynthesis such as nucleophile oxidation reaction(NOR) is an economical and green ***,its development has been hindered by the inadequate understanding of the synergy between the electrochemical and non-electrochemical *** this study,we unravel the NOR me chanism for the primary alcohol/vicinal diol electro oxidation on ***,the ele ctrochemical step is the generation of Ni3+-(OH)ads,and the spontaneous reaction between Ni3+-(OH)adsand nucle ophiles is an electrocatalyst-induced non-electrochemical *** identify that two electrophilic oxygen-mediated mechanisms(EOMs),EOM involving hydrogen atom transfer(HAT) and EOM involving C-C bond cleavage,play pivotal roles in the electro oxidation of primary alcohol to carboxylic acid and the electrooxidation of vicinal diol to carboxylic acid and formic acid,*** on these findings,we establish a unified NOR mechanism for alcohol electrooxidation and deepen the understanding of the synergy between the electrochemical and non-electro chemical steps during NOR,which can guide the sustainable electrochemical synthesis of organic chemicals.

关键词： nucleophile oxidation reaction alcohol electrooxidation organic electrosynthesis nickel-based electrocatalysts C-C bond cleavage

台湾地区出版新形势给图书采访工作带来的影响及对策——以国家图书馆为例

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图书馆建设 2010年第8期 30-33页

作者：史建桥崔云红国家图书馆北京100081

近年来,台湾地区出版界呈现出新的发展形势,使大陆图书馆对台湾地区图书的采访工作面临很大挑战。图书采访人员应从提高自身素质、广泛关注出版信息、处理好与书商的关系、加强图书采访深度、加强回溯、定期评估馆藏质量等方面积极应对... 详细信息

近年来,台湾地区出版界呈现出新的发展形势,使大陆图书馆对台湾地区图书的采访工作面临很大挑战。图书采访人员应从提高自身素质、广泛关注出版信息、处理好与书商的关系、加强图书采访深度、加强回溯、定期评估馆藏质量等方面积极应对,以确保采访质量。

关键词：台湾地区出版业国家图书馆采访工作

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共享单车押金性质探析

中国商论 2021年第8期 64-68页

作者：石剑桥广西师范大学法学院

共享单车企业向消费者收取押金的性质与线下交易之押金性质不同,应被认定为债之关系,消费者在交付押金后无法保有其所有权,仅享有对共享单车企业的债权返还请求权,因而其只能向共享单车企业主张返还,不可任意穿透债的相对性原理而及于... 详细信息

共享单车企业向消费者收取押金的性质与线下交易之押金性质不同,应被认定为债之关系,消费者在交付押金后无法保有其所有权,仅享有对共享单车企业的债权返还请求权,因而其只能向共享单车企业主张返还,不可任意穿透债的相对性原理而及于第三人。在此前提下,倘若企业破产后消费者仍无法追回其全部押金,除可适用公司法人人格否认制度向股东追偿等少数情形之外,该损失应依私法自治原则,由消费者个人承担。

关键词：共享单车押金让与担保债权债务关系消费者保护

《故训汇纂》和《古音汇纂》配套使用的研究价值

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中国训诂学报 2022年第1期 197-206页

作者：史建桥商务印书馆

《故训汇纂》和《古音汇纂》配套使用,对于研究汉语言文字、中国传统文化和文献典籍具有重要的价值。一、两书收集齐备,具有资料搜集的广泛性和丰富性。二、编排结构上注意展示汉语字词的形音义之间的关系,有助于使用者求本义,明假借,... 详细信息

《故训汇纂》和《古音汇纂》配套使用,对于研究汉语言文字、中国传统文化和文献典籍具有重要的价值。一、两书收集齐备,具有资料搜集的广泛性和丰富性。二、编排结构上注意展示汉语字词的形音义之间的关系,有助于使用者求本义,明假借,探同源。三、它们从音义关系进行的分析和梳理,有助于使用者掌握相关的词义系统。四、它们展示了科学系统的资料汇编型汉语辞书的编纂理念,为使用者提供了十分有用的案头工具书。

关键词：丰富性音义关系词义系统编纂理念

Adaptive Space Expansion for Fast Motion Planning

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IEEE/CAA Journal of Automatica Sinica 2024年第6期11卷 1499-1514页

作者： Shenglei shi Jiankui Chen State Key Laboratory of Digital Manufacturing Equipment and Technology School of Mechanical Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China

The sampling process is very inefficient for sam-pling-based motion planning algorithms that excess random sam-ples are generated in the planning *** this paper,we pro-pose an adaptive space expansion(ASE)approach which belongs to the informed sampling category to improve the sampling effi-ciency for quickly finding a feasible *** ASE method enlarges the search space gradually and restrains the sampling process in a sequence of small hyper-ellipsoid ring subsets to avoid exploring the unnecessary ***,for a con-structed small hyper-ellipsoid ring subset,if the algorithm cannot find a feasible path in it,then the subset is ***,the ASE method successively does space exploring and space expan-sion until the final path has been ***,we present a particular construction method of the hyper-ellipsoid ring that uniform random samples can be directly generated in *** last,we present a feasible motion planner BiASE and an asymptoti-cally optimal motion planner BiASE*using the bidirectional exploring method and the ASE *** demon-strate that the computation speed is much faster than that of the state-of-the-art *** source codes are available at https://***/shshlei/ompl.

关键词： Adaptive space expansion(ASE) hyper-ellipsoid ring informed sampling motion planning.

No Reference Image Sharpness Assessment Based on Global Color Difference Variation

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Chinese Journal of Electronics 2024年第1期33卷 293-302页

作者： Chenyang shi Yandan LIN School of Artificial Intelligence Anhui Polytechnic University School of Mechanical Engineering Anhui Polytechnic University Department of Light Sources and Illuminating Engineering Fudan University Academy for Engineering & Technology Fudan University

Image quality assessment(IQA) model is designed to measure the image quality in consistent with subjective ratings by computational models. In this research, a valid no reference IQA(NR-IQA) model for color image sharpness assessment is proposed based on local color difference map in a color space. In the proposed model, the absolute color difference variation and relative color difference variation are combined to evaluate sharpness in YIQ color space(a color coordinate system for the development of the United States color television system). The difference between sharpest and blurriest spot of an image is represented by the absolute color difference variation, and relative color difference variation expresses the variation in the image content. Extensive experiments are performed on five publicly available benchmark synthetic blur databases and two real blur databases, and the results prove that the proposed model work better than the other state-of-the-art and latest NR-IQA models for the prediction accuracy on blurry images. Besides, the model maintains the lowest computational complexity.

关键词： Image quality TV Image color analysis Databases Computational modeling Color Predictive models

An uncertainty investigation for liner impedance eduction methods

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Chinese Journal of Aeronautics 2024年第3期37卷 49-59页

作者： Weihao shi Xiaodong JING School of Energy and Power Engineering Beihang UniversityBeijing 100191China

Impedance eduction methods have been developed for decades to meet the increasing need for high-quality impedance data in the design and optimization of acoustic *** this end,it is important to fully investigate the uncertainty problem,to which only limited attention has been devoted so *** paper considers the possibility of acoustically-induced structural vibration as a nonnegligible uncertainty or error source in impedance eduction *** the frequency moves away from the resonant frequency,with the increase in the value of cavity reactance,the acoustic particle velocity inside liner orifices possibly decreases to the extent comparable to the vibration velocity of liner facing ***,the acoustically-induced vibration,although generally being weak except at the inherent structural frequencies,may considerably affect the impedance eduction results near the anti-resonant frequency where the liner has poor *** demonstrate the effect of structural vibration,the vibration velocity of liner facing sheet is estimated from the experimentally educed admittance of the liner samples whose orifices are sealed with ***,a three-dimensional numerical model is set up,in which normal particle velocity is introduced over the solid portion of liner facing sheet to imitate structural vibration,rather than directly solving the acoustic-structural coupling *** shown by the results,the vibration of liner facing sheet,whose velocity is as small as estimated by the experiment,can result in anomalous deviation of the educed impedance from the impedance model near the anti-resonant *** trend that the anomalous deviation varies with frequency is numerically captured.

关键词： Impedance eduction Uncertainty analysis Acoustically-induced structural vibration Anti-resonant frequency Perforated liner