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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

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

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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

Optical free induction decay emission carrying orbit angular momentum from ionic nitrogen enabled by multiple-photon resonance

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Chinese Optics Letters 2024年第6期22卷 177-181页

作者： Kailu Wang Haicheng Mei jingsong Gao Liang xu Hongbing Jiang Yi Liu Shanghai Key Laboratory of Modern Optical System University of Shanghai for Science and TechnologyShanghai 200093China State Key Laboratory for Mesoscopic Physics School of PhysicsPeking UniversityBeijing 100871China CAS Center for Excellence in Ultra-intense Laser Science Shanghai 201800China

Coherent optical emission of free induction decay (FID) excited by the multiple-photon resonance has been recently observed in nitrogen ions produced by intense femtosecond laser *** we report that orbit angular momentum (OAM) of the pump laser pulses can be transferred to the much longer pulsed free induction decay emission with the OAM *** was found that when the pump laser frequency approaches the fraction of the 391.4 nm emission (ν_(0)/5),an FID emission is emitted whereas its topological charge was identified to be 5 times of the pump *** to the reduced laser intensity with a vortex pump compared to the conventional Gaussian beam,the resonant pump laser wavelength presents a redshift,and the FID signal is significantly weaker.

关键词： air lasing orbital angular momentum free induction decay femtosecond pulses photoionization

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CO2电催化还原用过渡金属络合物催化剂

天然气化工—C1化学与化工 1990年第4期15卷 53-56页

作者：许劲松华东化工学院工业催化研究所

本文介绍了用于CO_2电催化还原的过渡金属络合物催化剂的研究近况及均相络合催化的反应机理,并对这类催化剂的选用提出了一些看法。

关键词：二氧化碳电催化还原络合物催化剂

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

埋置式波纹钢-混凝土结构中波纹钢的承载增强作用研究

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现代隧道技术 2018年第5期55卷 254-262页

作者：孙润方许劲松西南交通大学土木工程学院成都610031 云南省交通投资建设集团有限公司昆明650032

埋置式波纹钢-混凝土结构越来越多地应用于公路明挖隧道和棚洞中。目前对该结构的研究较为缺乏,在设计时基本不考虑波纹钢对结构整体承载力的增强作用,导致混凝土外衬厚度设计值偏大,经济性差。为此,文章采用数值模拟方法从应力、挠度... 详细信息

埋置式波纹钢-混凝土结构越来越多地应用于公路明挖隧道和棚洞中。目前对该结构的研究较为缺乏,在设计时基本不考虑波纹钢对结构整体承载力的增强作用,导致混凝土外衬厚度设计值偏大,经济性差。为此,文章采用数值模拟方法从应力、挠度两方面对比研究是否考虑波纹钢对结构承载增强作用的两种模型,分析了结构受力特征及波纹钢对于结构不同部位承载力的增强作用。研究表明:(1)结构波谷截面相对于波峰和波中而言应力与挠度较大;(2)结构拱肩至拱顶的最大拉应力接近其抗拉强度,挠度较大;拱脚至拱肩的最大压应力接近其抗压强度,挠度较小;(3)考虑波纹钢的承载作用时,结构应力和挠度在不同截面与环向位置明显减小;(4)在设计时应充分考虑波纹钢对结构的增强作用,以减小混凝土外衬的厚度,提升结构经济性能。

关键词：明挖隧道波纹钢-混凝土结构应力挠度增强作用数值模拟