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Superfluid states in α–T_(3) lattice

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Chinese Physics B 2021年第6期30卷 137-142页

作者： yu-rong wu Yi-Cai Zhang School of Physics and Materials Science Guangzhou UniversityGuangzhou 510006China

The superfluid states of attractive Hubbard model in α–T_(3) lattice are investigated. It is found that one usual needs three non-zero superfluid order parameters to describe the superfluid states due to three sublattices. When two hopping amplitudes are equal, the system has particle–hole symmetry. The flat band plays an important role in superfluid pairing near half filling. For example, when the filling factor falls into the flat band, the large density of states in the flat band favors superfluid pairing and the superfluid order parameters reach relatively large values. When the filling factor is in the gap between the flat band and upper band, the superfluid order parameters take small values due to the vanishing of density of states. The superfluid order parameters show nonmonotonic behaviors with the increase of filling factor. At last, we also investigate the edge states with open boundary conditions. It is shown that there exist some interesting edge states in the middle of quasi-particle bands.

关键词： superfluid states flat band α–T_(3)lattice particle–hole symmetry

Controlling the entropic uncertainty and quantum discord in two two-level systems by an ancilla in dissipative environments

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Chinese Physics B 2021年第3期30卷 441-446页

作者： rong-yu wu Mao-Fa Fang Synergetic Innovation Center for Quantum Effects and Application Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of EducationSchool of Physics and ElectronicsHunan Normal UniversityChangsha 410081China

The uncertainty principle is a crucial aspect of quantum *** has been shown that the uncertainty principle can be tightened by quantum discord and classical correlation in the presence of quantum *** investigate the control of the entropic uncertainty and quantum discord in two two-level systems by an ancilla in dissipative *** results show that the entropic uncertainty of an observed system can be reduced and the quantum discord between the observed system and the quantum memory system can be enhanced in the steady state of the system by adding an dissipative ***,via preparing the state of the system to the highest excited state with hight fidelity,the entropic uncertainty can be reduced markedly and the quantum discord can be enhanced *** explain these results using the definition of state ***,we present an effective strategy to further reduce the the entropic uncertainty and to enhance the the quantum discord via quantum-jump-based feedback ***,our results may be of importance in the context of quantum information technologies.

关键词： entropic uncertainty quantum discord dissipative environment ancilla

Interconnected Bi_(5)Nb_(3)O_(15)@CNTs network as high-performance anode materials of Li-ion battery

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Rare Metals 2022年第10期41卷 3401-3411页

作者： Xue-Zhong Li Nan Zhang yu-rong wu Qin-Zhi Lai Yan-rong Zhu Jun-Hong Zhang Ping Cui Ting-Feng Yi School of Materials Science and Engineering Northeastern UniversityShenyang110819China School of Chemistry and Chemical Engineering Anhui University of TechnologyMaanshan243002China Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province Qinhuangdao066004China Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology College of Chemistry and Chemical EngineeringLiaocheng UniversityLiaocheng252059China

In this work,the facile carbon nanotubes(CNTs) modulation strategy was successfully used to fabricate Bi_(5) Nb_(3) O_(15)@CNTs composites as anode materials for lithium-ion battery by a simple solid-state *** introduction of CNTs does not change the structure of the Bi_(5) Nb_(3) O_(15) materials,the Bi_(5) Nb_(3) O_(15) particles are decorated on a three-dimensional CNTs network,and the high conductive network promotes transfer of electron/ion and relieve the volume change of Bi_(5) Nb_(3) O_(15).The Bi_(5) Nb_(3) O_(15)@CNTs(8 wt%) electrode shows a superior rate capability with charge(discharge) capacities of 490(898.7),379.1(401.6),311.3(326.9),276.5(285.5) and 243.4(252)mAh·g^(-1) at 50,100,200,300 and 500 mA·g^(-1),***,the Bi_(5) Nb_(3) O_(15) only shows charge(discharge) capacities of 431(772.6),278.6(309.9),193.1(213.7),160.8(171.1),129.9(139.1) mAh·g^(-1) at the corresponding rates,*** excellent rate capability of Bi_(5) Nb_(3) O_(15)@CNTs can be ascribed to the homogeneous distribution of Bi_(5) Nb_(3) O_(15) particles in the CNTs conductive network and the enhancement of ***,the CNTs modulation can be considered as an effective strategy to enhance electrochemical performances of Bi_(5) Nb_(3) O_(15) materials.

关键词： Bi_(5)Nb_(3)O_(15) Carbon nanotubes(CNTs) Anode Li-ion battery(LIB)

Toward superior lithium/sodium storage performance: design and construction of novel TiO_(2)-based anode materials

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Rare Metals 2021年第11期40卷 3049-3075页

作者： Pan-Pan Peng yu-rong wu Xue-Zhong Li Jun-Hong Zhang Yan-Wei Li Ping Cui Ting-Feng Yi School of Materials Science and Engineering Northeastern UniversityShenyang 110819China School of Chemistry and Chemical Engineering Anhui University of TechnologyMaanshan 243002China Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology College of Chemistry and Chemical EngineeringLiaocheng UniversityLiaocheng 252059China Department of Materials Science and Engineering University of WashingtonSeattleWA 98195USA Guangxi Key Laboratory of Electrochemical and Magneto-Chemical Function Materials College of Chemistry and BioengineeringGuilin University of TechnologyGuilin 541004China

TiO_(2)-based materials have been considered as one of most promising alternatives for high-performance Li(Na)-ion batteries because of the low cost,simple composition,easy synthesis,good environmental protection,excellent safety and relatively high specific ***,the inferior electronic conductivity and poor ion diffusion coefficients are the biggest bottlenecks that restrict the popular *** effort has been focused on resolving these problems toward large-scale applications,and numerous significant advances have been *** the present work,a comprehensive overview of structure characteristics,electrochemical reaction mechanism and modification strategies of TiO_(2)-based materials was *** recent advances of various efficient ways for improving conductivity,Li(Na)storage capacity,rate capability and cycle stability are systematically summarized,including surface engineering,constructing composite and element doping,*** TiO_(2)-based materials with novel porous heterogeneous core-shell structures have been regarded as one of the most effective ways to resolve these ***,the future research directions and development prospects of TiO_(2)-based anode materials used in the manufacture of high-performance Li(Na)-ion batteries are *** review can provide important comprehension for the construction and optimization of highperformance of TiO_(2)-based anode materials.

关键词： TiO_(2) Anode material Li-ion battery Na-ion battery Electrochemical performance

Combination patterns of precipitation and its concentration degree determining the risk of dengue outbreaks in China

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Advances in Climate Change Research 2023年第5期14卷 768-777页

作者： yu-rong wu Xiao-Wen WANG Liang ZHAO Bo LU Jun-Feng yu Ze-Hua LIU Yi SUN Wan-Nian LIANG Cun-Rui HUANG School of Public Health Sun Yat-sen UniversityGuangzhou 510006China Vanke School of Public Health Tsinghua UniversityBeijing 100084China Shanghai Typhoon Institute China Meteorological Administration&Shanghai Key Laboratory of Meteorology and HealthShanghai Meteorological ServiceShanghai 200030China Center for Public Health and Epidemic Preparedness&Response Peking UniversityBeijing 100871China The State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics(LASG) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China National Climate Center China Meteorological AdministrationBeijing 100081China Institute of Healthy China Tsinghua UniversityBeijing 100084China

The amount and distribution of precipitation can determine dengue risk by affecting mosquito breeding;however,previous studies failed to incorporate this bivariate characteristic to examine dengue fever *** the present research,nationwide data on daily dengue cases in China between January 2005 and December 2020 were obtained,and the top 12 cities accounting for 78%of total cases were selected for *** patterns were quantified by weekly precipitation and precipitation concentration degree(PCD).On the basis of the combinations of both parameters,the exposure-response relationships of precipitation with dengue risk were established using generalised additive models,and the high-dengue-risk thresholds of precipitation patterns were further *** burden was assessed by calculating attributable dengue *** the same amount of precipitation,the dispersed precipitation in the pre-summer rainy season leads to a higher dengue risk in *** weekly precipitation of 100-150 mm and PCD of 0.2-0.4 constitute the highest risk scenario,and the average frequency of precipitation associated with dengue risk in 2013-2020 is 1.6 times higher than that in 2005-2012.A total of 3093 attributable dengue cases are *** 2005 to 2020,the amount of dispersed precipitation increased in southern and southwestern China and posed high dengue risks in central *** study has improved the understanding of the health impacts of irregular rainfall under climate *** approach to identifying thresholds provides information for early warning systems and helps reduce the risk of dengue transmission in the long run.

关键词： Climate change Precipitation pattern Precipitation concentration degree Dengue fever Mosquito-borne diseases

Kakeya极大算子及其分数次情形的正则性

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数学学报（中文版） 2018年第5期61卷 783-800页

作者：刘风吴玉荣山东科技大学数学与系统科学学院青岛266590 浙江工业大学应用数学系杭州310023

研究中心Kakeya （Nikodym）极大算子KN（N＞2）及其分数次情形Kα,N（0＜α＜d）的正则性.特别地,建立了中心分数次Kakeya极大算子Kα,N是从W^1,p（R^d）到W^1,q（R^d）上的有界连续算子,其中1＜p＜∞,q=dp/（d-αp）和0≤α＜ d/p.还... 详细信息

研究中心Kakeya （Nikodym）极大算子KN（N＞2）及其分数次情形Kα,N（0＜α＜d）的正则性.特别地,建立了中心分数次Kakeya极大算子Kα,N是从W^1,p（R^d）到W^1,q（R^d）上的有界连续算子,其中1＜p＜∞,q=dp/（d-αp）和0≤α＜ d/p.还证明了中心Kakeya极大算子KN是分数次Sobolev空间W^s,p（R^d）,非齐次Triebel-Lizorkin空间Fs^p,q（R^d）以及非齐次Besov空间Fs^p,q（R^d）上的有界连续算子,其中0＜s＜1,1＜p,q＜∞.此外,也考虑分数次Kakeya极大函数的弱导数的两种点态估计以及其离散情形的正则性.

关键词： Kakeya极大算子分数次Kakeya极大算子 Sobolev空间 Triebel—Lizorkin 空间连续性

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一种新的小波相位匹配方法

上海交通大学学报 1999年第5期33卷 520-522页

作者：周军余武荣周源华上海交通大学图像通信与信息处理研究所

在分析相位匹配算法的基础上，提出了由双正交小波基通过Ｈｉｌｂｅｒｔ变换构造复小波变换核的方法．通过该方法构造的复小波变换核，其实部与虚部正交，相互间有π／２相移，并具有线性相位特性。

关键词：小波基图像匹配视差相位匹配计算机视觉

Observation of acoustic hybrid topological phases induced by the p-d orbital interactions

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 132-139页

作者： Xiao Xiang Feng Gao yu-Gui Peng Peng wu Zong-Lin Li Xue-Feng Zhu School of Physics and Innovation Institute Huazhong University of Science and Technology

In spinless systems,growing attention has recently been attracted to synthetic gauge fields,which redefine the fundamental crystal symmetries by utilizing the projective algebraic ***,synthetic gauge fields have been commonly investigated in single orbital systems,and explorations on hybrid orbitals remain elusive in ***,we report the experimental observation of hybrid topological phases induced by hybrid synthetic gauge flux,which is formed by the interaction between p and d orbitals embedded in acoustic *** breaking the translation symmetries of Lxand/or Ly,we unambiguously demonstrate the first-order M?bius edge states and higher-order corner *** work establishes a platform for seeking exotic topological phases induced by hybrid-orbitals interactions and initializing the framework of hybrid-orbitalsrelated topological *** applications can be anticipated in scenarios such as high-quality sensing and robust wave trapping due to the stepwise energy distribution of the hybrid topological phase.

关键词： topological insulator synthetic gauge field projective symmetry corner states

Mechanistic insight into the synergy between nickel single atoms and nanoparticles on N-doped carbon for electroreduction of CO2

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Journal of Energy Chemistry 2025年第1期100卷 327-336页

作者： Mingdong Sun Wenwen Guan Cailing Chen Chao wu Xiaoling Liu Biao Meng Tao Chen yu Han Jun Wang Shibo Xi yu Zhou State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering Nanjing Tech University Advanced Membranes and Porous Materials Center Physical Sciences and Engineering Division King Abdullah University of Science and Technology Institute of Sustainability for Chemicals Energy and Environment A*STAR (Agency for Science Technology and Research) College of Materials Science and Engineering Sichuan University

The synergy of single atoms （SAs） and nanoparticles （NPs） has demonstrated great potential in promoting the electrocatalytic carbon dioxide reduction reaction （CO2RR）;however,the rationalization of the SAs/NPs proportion remains one challenge for the catalyst ***,a Ni2+-loaded porous poly（ionic liquids）(PIL) precursor synthesized through the free radical self-polymerization of the ionic liquid monomer,1-allyl-3-vinylimidazolium chloride,was pyrolyzed to prepare the Ni,N co-doped carbon materials,in which the proportion of Ni SAs and NPs could be facilely modulated by controlling the annealing *** catalyst Ni-NC-1000 with a moderate proportion of Ni SAs and NPs exhibited high efficiency in the electrocatalytic conversion of CO2into *** Ni K-edge X-ray absorption near-edge structure （XANES） spectra and theoretical calculations were conducted to gain insight into the synergy of Ni SAs and *** charge transfer from Ni NPs to the surrounding carbon layer and then to the Ni SAs resulted in the electron-enriched Ni SAs active *** the electroreduction of CO2,the coexistence of Ni SAs and NPs strengthened the CO2activation and the affinity towards the key intermediate of*COOH,lowering the free energy for the potential-determining*CO2→*COOH step,and therefore promoted the catalysis efficiency.

关键词： Single atom catalyst Synergy effect Carbon catalyst Electrocatalysis