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Nano Research 2024年第6期17卷 4943-4950页

作者： Rui Li Xiayan Yan Meng Liu Qingkai Zhao Jie Du Xinxin Tan Jingwen Ba Rongguang Zeng Wenhua Luo jingsong xu Institute of Materials China Academy of Engineering PhysicsJiangyou 621907China Science and Technology on Surface Physics and Chemistry Laboratory Jiangyou 621908China

Top-down strategy has been widely applied for synthesis of metal single atom catalysts(SACs)via converting metal nanoparticles or bulk metals into atomically dispersed ***,we report a simple electrochemical atomic migration strategy for top-down synthesis of SACs via a facile cathodic corrosion process without involving high temperature or harsh *** of metal nanoparticles on cathode are firstly disbanded under high negative voltage,and emitted into the electrolyte in the form of atomic metal anions in Zintl *** escaped atomically dispersed metal species are then oxidized by water molecules and captured by the defects on the pre-added nitrogen doped carbon carriers in the *** cathodic corrosion strategy is confirmed to be suitable for scalable synthesis of kinds of metal SACs(e.g.,Pt,Pd,and Ir)on doped carbon ***,the as-prepared nitrogen doped carbon powder supported Pt SACs exhibit superior catalytic activity toward hydrogen evolution reaction(HER)with a low overpotential of 0.024 V at 10 mA·cm^(−2)and a low Tafel slope of 29.7 mV·dec^(−1)as well as a long-term durability.

关键词： cathodic corrosion top-down strategy powdery single atom catalysts hydrogen evolution reaction scalable synthesis

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基于兴趣度匹配的应急物资采购策略研究

物流科技 2024年第14期47卷 28-32页

作者：黄晓俊相峰徐劲松南京邮电大学现代邮政学院&研究院江苏南京210003 圆通速递股份有限公司上海201705 南京邮电大学国家邮政局邮政行业技术研发中心(物联网技术) 江苏南京210003

在物流运输环境异常、跨区域运力不足的情况下,传统应急物流中以生存为第一要义的物资采购策略难以同时满足交付的个性化需求和时效性要求。文章中提出了一种基于兴趣度匹配的应急物资采购策略,将本地库存货物的兴趣度设定为二维向量,... 详细信息

在物流运输环境异常、跨区域运力不足的情况下,传统应急物流中以生存为第一要义的物资采购策略难以同时满足交付的个性化需求和时效性要求。文章中提出了一种基于兴趣度匹配的应急物资采购策略,将本地库存货物的兴趣度设定为二维向量,通过分析货物新鲜度,采购价格,运输代价及时间等影响因子得到预计时间兴趣度与预计代价兴趣度的计算方法,并利用BP神经网络进行兴趣度的融合,最终按照兴趣偏转量和对应的匹配原则为采购方选出最佳物资。实验结果表明了兴趣度算法的有效性和采购策略的可行性。

关键词：物流工程应急供应链物资采购兴趣匹配

Platinum single atom catalysts for hydrogen isotope separation during hydrogen evolution reaction

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Nano Research 2022年第5期15卷 3952-3958页

作者： jingsong xu Rui Li Xiayan Yan Qingkai Zhao Rongguang Zeng Jingwen Ba Qifa Pan Xin Xiang Daqiao Meng Science and Technology on Surface Physics and Chemistry Laboratory Jiangyou 621908China Institute of Materials China Academy of Engineering PhysicsJiangyou 621907China

Electrolysis of water is widely used for hydrogen isotope separation and the development of hydrogen evolution reaction(HER)catalysts with high selectivity and activity is of key ***,we propose single atom catalysts(SACs)as promising catalysts for efficient hydrogen isotope *** SACs and Pt nanoparticles(NPs)have been fabricated on nanoarray-structured nitrogen-doped graphite foil(NGF)substrate by a polyol reduction *** as prepared Pt1/NGF electrode exhibits high activity and selectivity toward HER with a low overpotential of 0.022 V at 10 mA·cm^(-2) and a high separation factor of 6.83 for hydrogen and deuterium separation,much better than Pt NPs *** functional theory(DFT)calculations ascribe the high activity and selectivity to the constructed Pt-N_(2)C_(2) *** work develops a new opportunity for the design and application of high-efficiency and stable SACs toward hydrogen isotope separation by electrolysis of water.

关键词： hydrogen isotope separation,single atom catalysts hydrogen evolution reaction polyol reduction separation factor

Cathodic corrosion as a facile and universal method for the preparation of supported metal single atoms

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Nano Research 2022年第3期15卷 1838-1844页

作者： Rui Li jingsong xu Qingkai Zhao Wensheng Ren Rongguang Zeng Qifa Pan Xiayan Yan Jingwen Ba Tao Tang Wenhua Luo Institute of Materials China Academy of Engineering PhysicsJiangyou 621907China Science and Technology on Surface Physics and Chemistry Laboratory Jiangyou 621908China

Top-down strategy has been generally adopted for preparation of metal single atom catalysts(SACs)due to the simplified synthetic process,metal economics,and scalability ***,we propose a general top-down route to convert metal nanoparticles into uniformly dispersed metal single atoms in mild electrochemical environment via a facile cathodic corrosion *** the synthetic process,Pt nanoparticles precursors are transformed into migrating Pt single atoms(Pt1)driven by a high negative potential;and subsequently these mobile Pt atoms are trapped and stabilized by N coordination sites of N-doped carbon paper(NCP).The as-prepared Pt1/NCP electrodes exhibit a superior catalytic activity toward hydrogen evolution reaction(HER)with a low overpotential of 0.022 V at 10 mA/cm^(2)and a low Tafel slope of 28.5 mV/dec as well as a long-term ***,the proposed electrochemical atomic migration strategy shows a promising generality for fabricating other metal single atoms(e.g.,Pd,Ir,Cu),which may open a new avenue for metallic SACs preparation.

关键词： top-down strategy electrochemical atomic migration cathodic corrosion nitrogen doped carbon paper metal single atoms hydrogen evolution reaction

Online Pattern Recognition and Data Correction of PMU Data Under GPS Spoofing Attack

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Journal of Modern Power Systems and Clean Energy 2020年第6期8卷 1240-1249页

作者： Ancheng xue Feiyang xu jingsong xu Joe H.Chow Shuang Leng Tianshu Bi State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijing 102206China State Grid Ningxia Yinchuan Electric Power Company Yinchuan 750001China the Department of Electrical Computerand Systems EngineeringRensselaer Polytechnic Institute(RPI)TroyNY 12180USA

Smart grids are increasingly dependent on data with the rapid development of communication and *** one of the important data sources of smart grids,phasor measurement unit(PMU)is facing the high risk from *** with cyber attacks,global position system(GPS)spoofing attacks(GSAs)are easier to implement because they can be exploited by portable devices,without the need to access the physical ***,this paper proposes a novel method for pattern recognition of GSA and an additional function of the proposed method is the data correction to the phase angle difference(PAD)***,this paper analyzes the effect of GSA on PMU measurement and gives two common patterns of GSA,i.e.,the step attack and the ramp ***,the method of estimating the PAD deviation across a transmission line introduced by GSA is proposed,which does not require the line *** obtaining the estimated PAD deviations,the pattern of GSA can be recognized by hypothesis tests and correlation coefficients according to the statistical characteristics of the estimated PAD ***,with the case studies,the effectiveness of the proposed method is demonstrated,and the success rate of the pattern recognition and the online performance of the proposed method are analyzed.

关键词： global position system(GPS) GPS spoofing attack(GSA),phasor measurement,pattern recognition,data correction,line parameter

New SAR Imaging Algorithm via the Optimal Time-Frequency Transform Domain

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Computers, Materials & Continua 2020年第12期65卷 2351-2363页

作者： Zhenli Wang Qun Wang Jiayin Liu Zheng Liang jingsong xu Department of Computer Information and Network Security Jiangsu Police InstituteNanjingChina Research Fellow Faculty of Engineering and Information Technology University of Technology SydneyNew South WalesAustralia

To address the low-resolution imaging problem in relation to traditional Range Doppler(RD)algorithm,this paper intends to propose a new algorithm based on Fractional Fourier Transform(FrFT),which proves highly advantageous in the acquisition of high-resolution Synthetic Aperture Radar(SAR)*** expression of the optimal order of SAR range signals using FrFT is deduced in detail,and the corresponding expression of the azimuth signal is also *** analysis shows that,the optimal order in range(azimuth)direction,which turns out to be very unique,depends on the known imaging parameters of SAR,therefore the engineering practicability of FrFT-RD algorithm can be greatly improved without the need of order *** FrFT-RD algorithm is established after an analysis of the optimal time-frequency *** results demonstrate that,compared with traditional RD algorithm,the main-lobe width of the peak-point target of FrFT-RD algorithm is narrow in both range and azimuth *** the peak amplitude of the first side-lobe is reduced significantly,those of other side-lobes also drop in various *** this way,the imaging resolution of range and azimuth can be increased considerably.

关键词： Fourier transform fractional Fourier transform synthetic aperture radar range doppler algorithm

Topological pseudospin switcher:Mechanism and acoustic realization

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Science China(Physics,Mechanics & Astronomy) 2024年第5期67卷 46-53页

作者： Jia-He Chen Yiyin Chen Yaoqieyu Song Yongxu xu Xinrong Li jingsong Wang Jiawei He Jiaxu Qu Zheng Li Xiaofei Li Wenqiang Lin Jiannan Chen Caixing Fu Zhi Hong Hang School of Physical Science and Technology&Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow UniversitySuzhou 215006China Institute for Advanced Study Soochow UniversitySuzhou 215006China Provincial Key Lab of Thin Films Soochow UniversitySuzhou 215006China

The control of the pseudospin of sound wave has attracted increasing attention in recent *** the finite-size effect of topological acoustics,we successfully construct an H-shaped acoustic topological pseudospin switcher that sound wave energy can be easily switched through different *** interesting phenomenon of pseudospin flipping is numerically and experimentally demonstrated.A quantitative interference theory is proposed that the constructive and destructive interference of pseudospin states leads to pseudospin flipping and preserving in multiple *** verify the key parameters of the design,including the length of the passage and its interface state dispersion,and the theory can be extended to other topology acoustics and photonics ***,the tunable topological sonic crystal we use provides adjustable convenience to pseudospin switcher *** pseudospin switching behavior offers an efficient method to control the acoustic topological edge state transport,which has great potential in versatile applications,such as integrated acoustics,acoustic security,and information processing.

关键词： topological acoustics realization

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差分式共振光声光谱技术研究

中国激光 2024年第5期51卷 229-234页

作者：徐靖黄琪李劲松航宇救生装备有限公司湖北襄阳441003 安徽大学物理与光电工程学院安徽合肥230601

针对光声光谱系统本底噪声限制问题,以圆柱形声共振器作为研究对象,开展了双共振腔光声池设计,并将共振光声光谱和差分探测原理相结合,建立了一套基于近红外半导体激光器的高灵敏度激光光谱气体探测系统。以空气中的水汽(H_(2)O)分子作... 详细信息

针对光声光谱系统本底噪声限制问题,以圆柱形声共振器作为研究对象,开展了双共振腔光声池设计,并将共振光声光谱和差分探测原理相结合,建立了一套基于近红外半导体激光器的高灵敏度激光光谱气体探测系统。以空气中的水汽(H_(2)O)分子作为检测对象,结合高灵敏度波长调制二次谐波探测方法,对建立的差分式共振光声光谱系统进行了理论分析和实验评估。艾伦方差分析结果显示,系统可实现几个10^(-6)量级水汽分子浓度的高灵敏度检测。相较于传统单通道光声探测模式,所提出的差分探测式共振光声光谱探测技术可有效提升系统的稳定性和检测灵敏度,最佳信号平均时间可提高2倍。

关键词：光谱学光声光谱差分探测共振效应气体检测

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援书论琴:论书学理论向琴学理论的渗透

音乐文化研究 2023年第4期 142-148,M0005页

作者：徐靖松扬州大学文学院扬州225100

书学理论在中国传统艺术理论中具有向其他门类理论渗透的特征。传统琴学理论在讨论技法问题时往往涉及书学理论。“援书论琴”是一种艺术通感现象,其形成赖以书法与古琴强调线条与节奏的共通审美基础,以及文人群体自身对古琴与书法的艺... 详细信息

书学理论在中国传统艺术理论中具有向其他门类理论渗透的特征。传统琴学理论在讨论技法问题时往往涉及书学理论。“援书论琴”是一种艺术通感现象,其形成赖以书法与古琴强调线条与节奏的共通审美基础,以及文人群体自身对古琴与书法的艺术实践。“援书论琴”的理论阐释,主要体现在以笔法论指法的问题上,兼有以用笔理论论琴学流派的现象。“援书论琴”显示出传统琴学观念中对习琴者文人身份的重视,即默认习琴者在工琴之外应兼具书画等综合修养。

关键词：援书论琴书学理论琴学理论理论渗透

利用国铁资源构建多主体协同的市域(郊)铁路发展新格局研究

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铁道运输与经济 2022年第8期44卷 22-28,35页

作者：王超徐镜松罗江武剑红北京交通大学经济管理学院北京100044

都市圈的高质量发展离不开高水平的市域(郊)铁路基础设施和服务水平的有力支撑。目前我国都市圈市域(郊)铁路发展建设取得了一定的成绩,但总体网络布局和运营服务水平还无法满足我国都市圈高质量发展的需求,存在与城市发展协同融合度不... 详细信息

都市圈的高质量发展离不开高水平的市域(郊)铁路基础设施和服务水平的有力支撑。目前我国都市圈市域(郊)铁路发展建设取得了一定的成绩,但总体网络布局和运营服务水平还无法满足我国都市圈高质量发展的需求,存在与城市发展协同融合度不够所导致的客流规模不足、缺乏有效合理的多主体合作体制机制等问题。通过分析我国都市圈市域(郊)铁路发展的现状及主要矛盾,在借鉴日本、美国以及欧洲等国市域(郊)铁路发展体制机制经验的基础上,从法律法规、顶层体制设计、利用既有铁路发展市域(郊)铁路等方面,提出建立符合我国都市圈铁路技术经济特点的以中央、地方和铁路部门有效协同合作为特征的都市圈市域(郊)铁路发展体制机制,为发展以满足通勤运输为主的我国都市圈市域(郊)铁路提供参考。

关键词：市域(郊)铁路都市圈多主体协同分类政策体制机制