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Chinese Chemical Letters 2024年第2期35卷 611-616页

作者： Jiawen sun hui Xue Jing sun Niankun Guo Tianshan Song Yi-Ru Hao Qin Wang College of Chemistry and Chemical Engineering Inner Mongolia UniversityHohhot 010021China

Modulating surface charge redistribution based on interface and defect engineering has been considered as a resultful means to boost electrocatalytic ***,the mechanism of synergistic regulation of heterojunction and vacancy defects remains ***,a Vs-CoP-CoS_(2)/C n-n heterojunction with sulfur vacancies is successfully constructed,which manifests superior electrocatalytic activity for oxygen evolution,as demonstrated by a low overpotential of 170 mV to reach 10 mA/cm^(2).The experimental results and density functional theory calculations testify that the outstanding OER performance of Vs-CoP-CoS_(2)/C heterojunction is owed to the synergistic effect of sulfur vacancies and built-in electric field at n-n heterogeneous interface,which accelerates the electron transfer,induces the charge redistribution,and regulates the adsorption energy of active intermediates during the *** study affords a promising means to regulate the electrocatalytic performance by the construction of heterogeneous interfaces and defects,and in-depth explores the synergistic mechanisms of n-n heterojunction and vacancies.

关键词： Charge redistribution n-n Heterojunction Built-in electric field Sulfur vacancy Oxygen evolution reaction

Detection Method for Cascading Failure of Power Systems Based on Epidemic Model

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CSEE Journal of Power and Energy Systems 2024年第3期10卷 1356-1370页

作者： Jian Xu Zhonghao He Siyang Liao Yuanzhang sun Liangzhong Yao Deping ke Jun Yang School of Electrical Engineering and Automation Wuhan UniversityWuhan 430072China IEEE

The early detection of cascading failure plays an important role in the safe and stable operation of the power system with high penetration of renewable *** paper proposes a fault propagation dynamic model based on the epidemic model,and further puts forward a method to detect the development of cascading *** the simulation of the IEEE 39-bus and 118-bus systems,this model is proven to be valid and capable of providing practical technical support for the prevention of cascading failures in power systems with high penetration of renewable *** paper also provides an analysis method for the choice of different protection and control measures at each stage of cascading failure,which has critical significance and follow-up value.

关键词： Cascading failure complex network epidemic model fault propagation renewable energy weight method of game theory

Synthesis,chemical bonding and reactivity of new medium-sized polyarsenides

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Chinese Chemical Letters 2024年第7期35卷 497-501页

作者： Xu-hui Yue Xiang-Wen Zhang hui-Min He Lei Qiao Zhong-Ming sun State key Laboratory of Element-Organic Chemistry Tianjin Key Lab for Institution Rare Earth Materials and ApplicationsSchool of Materials Science and EngineeringNankai UniversityTianjin 300350China Department of Physics Institute of Computational and Applied PhysicsTaiyuan Normal UniversityJinzhong 030619China

Gaining an understanding of the growth mechanism from single atoms to clusters and bulk materials continues to present a ***,it is important to explore the evolving trends of clusters in the structure and properties during the size *** this work,we report the synthesis and characterization of two medium-sized chain-like polyarsenic anions.[As_(21)]^(3-)represents a trimeric example of polyarsenic anion assembled through oxidative coupling of As_(7)^(3-)*** anion As_(18)^(4-)included in[As_(18)MO_(2)(CO)_(8)]^(4-)is regarded as formed by two realgar-type As_(8)subunits connected by a dinuclear AsAs *** As_(18)cluster was previously predicted by theory,and this is the first time successfully synthesized using wet chemistry ***,small-sized polyarsenides As_(2)^(2-)and As_(10)^(2-)were found in compound[K(18-crown-6)]_(3)[As_(10)]_(0.5)[As_(4){Mo(CO)_(3)}_(2)]_(0.5)·*** these,the former exhibits coordination with metal ***-crystal X-ray diffraction combined with quantum chemical calculations revealed the formation of double bonded As_(2)^(2-)stabilized by metal carbonyl *** work demonstrates a novel synthetic approach for the preparation of new polyarsenides and highlights their intriguing bonding characteristics,laying the foundation for the synthesis of such compounds and paving the way for their potential applications.

关键词： Polyarsenide Zintl anions Chain-like cluster DFT calculations AdNDP

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Exploring formation mechanism and source attribution of ozone during the 2019 Wuhan Military World Games:Implications for ozone control strategies

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Journal of Environmental Sciences 2024年第2期136卷 400-411页

作者： Lei Zhang Lili Wang Runyu Wang Nan Chen Yuan Yang ke Li Jie sun Dan Yao Yuesi Wang Minghui Tao Yang sun Institute of Atmospheric Physics Chinese Academy of SciencesBeijing 100029China University of the Chinese Academy of Sciences Beijing 100049China Hubei Ecological Environment Monitoring Center Station Wuhan 430072China Guizhou Research and Designing Institute of Environmental Sciences Guizhou Academy of Environmental Science and DesignGuiyang 550081China Jiangsu key Laboratory of Atmospheric Environment Monitoring and Pollution Control Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment TechnologySchool of Environmental Science and EngineeringNanjing University of Information Science and TechnologyNanjing 210044China School of Environment Key Laboratory for Yellow River and Huai River Water Environment and Pollution ControlMinistry of EducationHenan Normal UniversityXinxiang 453007China key Laboratory of Regional Ecology and Environmental Change School of Geography and Information EngineeringChina University of GeosciencesWuhan 430074China

A series of emission reduction measures were conducted in Wuhan,Central China,to ensure good air quality during the 7th Military World Games(MWG)in October *** better understand the implications for ozone(O_(3))pollution control strategies,we applied integrated analysis approaches based on the de-weathered statistical model,parameterization methods,chemical box model,and positive matrix factorization *** the MWG,concentrations of O_(3),NO_x,and volatile organic compound(VOCs),OFP(O_(3)formation potential),L_(OH)(OH radical loss rate)were 83μg/m^(3),43μg/m^(3),26 ppbv,188μg/m^(3),and 3.9 s^(-1),respectively,which were 26%,18%,3%,15%,and 13%lower than pre-MWG values and 6%,39%,30%,33%,and 50%lower than post-MWG values,*** removing meteorological influence,O_(3)and its precursors during the MWG decreased largely compared with post-MWG values,and only O_(3),NO_(2),and oxygenated VOCs(OVOCs)declined compared with pre-MWG values,which revealed the emission reduction measures during the MWG played an important role for O_(3)*** six VOCs sources,the mass contributions of biomass burning and solvents usage during the MWG decreased largely compared with pre-MWG values.O_(3)production was sensitive to VOCs and the key species were aromatics,OVOCs,and alkenes,which originated mainly from solvents usage,biomass burning,industrial-related combustion,and vehicle *** O_(3)concentration during the strict control was mainly caused by OVOCs reduction due to biomass burning ***,the O_(3)abatement strategies of Wuhan should be focused on the mitigation of high-reactivity VOCs.

关键词： VOCs Ozone Wuhan Military World Games Source apportionment Relative incremental reactivity Random forest

离散忆阻混沌系统的Simulink建模及其动力学特性分析

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物理学报 2022年第3期71卷 36-45页

作者：扶龙香贺少波王会海孙克辉中南大学物理与电子学院长沙410083

为拓广离散忆阻器的研究与应用,基于差分算子,构建了具有平方非线性的离散忆阻模型,并实现了Simulink仿真.仿真结果表明,设计的忆阻器满足广义忆阻定义.将得到的离散忆阻引入三维混沌映射中,设计了一种新型四维忆阻混沌映射,并建立了该... 详细信息

为拓广离散忆阻器的研究与应用,基于差分算子,构建了具有平方非线性的离散忆阻模型,并实现了Simulink仿真.仿真结果表明,设计的忆阻器满足广义忆阻定义.将得到的离散忆阻引入三维混沌映射中,设计了一种新型四维忆阻混沌映射,并建立了该混沌映射的Simulink模型.通过平衡点、分岔图、Lyapunov指数谱、复杂度、多稳态分析了系统复杂动力学特性.本文从系统建模角度出发,构建离散忆阻与离散忆阻混沌映射,进一步验证了离散忆阻的可实现性,为离散忆阻应用研究奠定了基础.

关键词：离散忆阻器混沌映射动力学特性 Simulink

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多用户混沌序列扩频通信系统设计与性能分析

电子与信息学报 2007年第10期29卷 2436-2440页

作者：孙克辉周家令牟俊中南大学物理科学与技术学院长沙410083

该文介绍了多用户混沌扩频通信系统原理,分析了Chebyshev,Logistic,Tent 3种混沌扩频序列的平衡性、相关性,建立了多用户混沌扩频通信系统动态可视化仿真模型,利用模型研究了这3种不同混沌扩频序列扩频码的初始值、信噪比、用户数以及... 详细信息

该文介绍了多用户混沌扩频通信系统原理,分析了Chebyshev,Logistic,Tent 3种混沌扩频序列的平衡性、相关性,建立了多用户混沌扩频通信系统动态可视化仿真模型,利用模型研究了这3种不同混沌扩频序列扩频码的初始值、信噪比、用户数以及截取的序列长度对系统误码率的影响。仿真结果表明,Chebyshev映射的扩频性能最好,Logistic映射次之,Tent映射最差,且这3种混沌扩频码的扩频性能均优于传统的扩频码。

关键词：混沌序列直接序列扩频平衡性相关性

Upcycling municipal solid waste to sustainable hydrogen via two-stage gasification-reforming

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Journal of Energy Chemistry 2024年第9期96卷 611-624页

作者： hui Zhou Shuzhuang sun Yikai Xu Yeshui Zhang Shouliang Yi Chunfei Wu Department of Energy and Power Engineering Tsinghua UniversityBeijing 100084China School of Chemical Engineering Zhengzhou UniversityZhengzhou 450001HenanChina key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center Frontiers Science Center for Materiobiology and Dynamic ChemistrySchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China School of Engineering University of AberdeenAberdeen AB243UEUK U.S.Department of Energy National Energy Technology LaboratoryPittsburghPA 15236USA School of Chemistry and Chemical Engineering Queen’s University BelfastBelfast BT71NNUK

As global municipal solid waste(MSW)quantities continue to escalate,serious socio-environmental challenges arise,necessitating innovative ***-to-hydrogen(WTH)via two-stage gasification-reforming(TSGR)presents an emergent technology for MSW upcycling,offering to ease waste management burdens and bolster the burgeoning hydrogen *** early initiatives to advance TSGR technology,a cohesive and critical analysis of cutting-edge knowledge and strategies to enhance hydrogen production remains *** review aggregates literature on MSW upcycling to hydrogen via TSGR,with a focus on optimizing process control and catalytic *** underscores technological avenues to augment hydrogen output,curtail catalyst costs,and refine system ***,the review illuminates the potential for integrating chemical and calcium looping into TSGR processes,identifying opportunities,and pinpointing *** review concludes with a summary of the current state of techno-economic analysis for this technology,presenting outstanding challenges and future research directions,with the ultimate goal of transitioning WTH from theoretical to practical application.

关键词： Municipal solidwaste Upcycling Gasification Reforming Hydrogen

A Novel Approach for Trajectory Tracking Control of an Under-Actuated Quad-Rotor UAV

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IEEE/CAA Journal of Automatica Sinica 2024年第9期11卷 2030-2032页

作者： ke Shao Kang Huang Shengchao Zhen Hao sun Rongrong Yu School of Civil Aviation Northwestern Polytechnical UniversityXi’an 710072 School of Mechanical Engineering Hefei University of TechnologyHefei 230009China

Dear Editor,This letter presents a novel Udwadia-Kalaba(U-K)approach for the trajectory tracking control of a quad-rotor unmanned aerial vehicle(UAV).Compared to conventional control approaches,the desired trajectorie... 详细信息

关键词： letter desired constraints

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分数阶统一系统的混沌动力学特性

华南理工大学学报（自然科学版） 2008年第8期36卷 6-10页

作者：孙克辉任健丘水生华南理工大学电子与信息学院广东广州510640 中南大学物理科学与技术学院湖南长沙410083

针对分数阶非线性系统普遍具有混沌特性的问题,采用观测系统吸引子相图、计算功率谱密度和最大Lyapunov指数等方法,分别分析了当参数固定(a=1)和变化时,分数阶统一系统随微分算子阶数变化时的动力学特性,得出了分数阶统一系统随系统参... 详细信息

针对分数阶非线性系统普遍具有混沌特性的问题,采用观测系统吸引子相图、计算功率谱密度和最大Lyapunov指数等方法,分别分析了当参数固定(a=1)和变化时,分数阶统一系统随微分算子阶数变化时的动力学特性,得出了分数阶统一系统随系统参数和系统阶数变化而出现混沌状态的规律,研究了分数阶系统通向混沌的道路.研究表明:分数阶统一系统的动力学状态既与系统参数有关,又与系统的分数阶大小有关;在参数固定或参数变化时,分数阶统一系统均随阶数变化而分段呈现混沌状态;当微分算子阶数为0.3时,分数阶统一系统随参数变化经短暂混沌和边界转折点分叉而进入混沌.由此可见,分数阶统一系统具有丰富的动力学特性.

关键词：分数阶系统统一混沌系统混沌动力学特性

Ligand-controlled electrochemiluminescence generation from CdSe/CdS/ZnS core/shell/shell quantum dots

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Nano Research 2024年第8期17卷 7776-7785页

作者： hui sun Zhiyuan Cao Haiyan Qin Xiaogang Peng Bin Su key Laboratory of Excited-State Materials of Zhejiang Province Department of ChemistryZhejiang UniversityHangzhou 310058China

The CdSe/CdS/ZnS core/shell/shell quantum dots(QDs)with strong exciton confinement have manifested themselves as competitive light-emitting materials in electrochemiluminescence(ECL).However,cathodic ECL generation by these QDs requires the injection of electron and hole from solid electrode and electrogenerated radicals(for example SO_(4)•^(−)),which is inevitably influenced by not only the inorganic structure of QDs but also the organic ligands on the *** this work we aimed at studying the impact of surface organic ligands on ECL performance of CdSe/CdS/ZnS *** changing the surface ligand from oleate to acetate,we phenomenologically observed the positive shift of ECL onset potential by ca.200 mV and the increase of ECL intensity by~100 times,suggesting that a short ligand is more favorable for ECL *** further comprehend the ligand effect,we measured the charge injection kinetics using potential-modulated,time-resolved photoluminescence,and thinlayer spectroelectrochemistry *** electron and hole injection into QDs were found to be accelerated by 2–20 times if shortening the ligand from oleate to acetate,confirming the significant impact of surface ligands on ECL performance of *** study is expected to provide guidance on how to design surface functionalized QDs for specific applications such as ECL immunodiagnosis,photocatalysis,and photovoltaics.

关键词： electrochemiluminescence quantum dots spectroelectrochemistry surface ligands charge injection charge transfer