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Photon sphere and phase transition of ddimensional(d≥5) charged Gauss–Bonnet AdS black holes

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Communications in Theoretical Physics 2020年第10期72卷 131-138页

作者： Shan-Zhong Han Jie jiang Ming zhang Wen-Biao Liu department of Physics Beijing Normal UniversityBeijing 100875China College of Physics and Communication Electronics Jiangxi Normal UniversityNanchang 330022China Perimeter Institute for Theoretical Physics WaterlooOntario N2L 2Y5Canada department of Physics and Astronomy University of WaterlooOntario N2L 3G1Canada

Motivated by recent work,nonmonotonic behaviors of photon sphere radius can be used to reflect black hole phase transition for Reissner–Nordstr?m–AdS(RN–AdS)black holes,we study the case of five-dimensional charged Gauss–Bonnet–AdS black holes in the reduced parameter *** find that the nonmonotonic behaviors of photon sphere radius still *** the coexistence line calculated from P–V plane,we capture the photon sphere radius of saturated small and large black holes(the boundary of the coexistence phase),then illustrate the reduced coexistence *** results show that,reduced coexistence region decreases with charge Q but increases with Gauss–Bonnet coefficientα.When the charge vanishes,reduced coexistence region does not vary with Gauss–Bonnet coefficientαany *** this case,the Gauss–Bonnet coefficientαplays the same role as the charge of five-dimensional RN–AdS black ***,the situation of higher dimension is studied in the end.

关键词： Gauss–Bonnet AdS black hole phase transition photon sphere black hole thermodynamics

Supramolecular systems for bioapplications:recent research progress in China

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science China Chemistry 2024年第5期67卷 1397-1441页

作者： Yue-Yang Liu Xiao-Yong Yu Yu-Chen Pan Hang Yin Shuang Chao Yujie Li He Ma Minzan Zuo Kun-Xu Teng Jun-Li Hou Yong Chen Dong-Sheng Guo Ruibing Wang Yuxin Pei Zhichao Pei jiang-Fei Xu Xiao-Yu Hu Chunju Li Qing-Zheng Yang Leyong Wang Yu Liu Zhan-Ting Li State Key Laboratory of Organometallic Chemistry Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional MoleculesShanghai Institute of Organic ChemistryChinese Academy of SciencesUniversity of Chinese Academy of SciencesShanghai 200032China department of Chemistry Fudan UniversityShanghai 200438China College of Chemistry State Key Laboratory of Elemento-Organic ChemistryCollaborative Innovation Center of Chemical Science and EngineeringNankai UniversityTianjin 300071China State Key Laboratory of Quality Research in Chinese Medicine Institute of Chinese Medical SciencesUniversity of MacaoMacao 999078China College of Chemistry&Pharmacy Northwest A&F UniversityYangling 712100China Key Lab of Organic Optoelectronics&Molecular Engineering Department of ChemistryTsinghua UniversityBeijing 100084China College of Materials science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 211106China Key Laboratory of Radiopharmaceuticals Ministry of EducationCollege of ChemistryBeijing Normal UniversityBeijing 100875China Tianjin Key Laboratory of Structure and Performance for Functional Molecules College of ChemistryTianjin Normal UniversityTianjin 300387China State Key Laboratory of Analytical Chemistry for Life science Jiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China

Supramolecular systems feature dynamic,reversible and stimuli-responsive characteristics,which are not easily achieved by molecular *** last decade has witnessed tremendous advances in the investigations of supramolecular systems for various bioapplications,which include drug delivery,anticancer therapy,antibacterial therapy,photodynamic therapy,photothermal therapy,combination therapy,antidotes for residual drugs or toxins,and bioimaging and ***-guest chemistry has played a key role in the development of such bioactive supramolecular systems,and natural macrocycles(such as cyclodextrins),synthetic macrocycles(such as calixarenes,cucurbit[n]urils,and pillararenes),and porous framework polymers(such as supramolecular organic frameworks and flexible organic frameworks)have been most successfully used as hosts to build different kinds of host-guest systems for attaining designed *** self-assembly of rationally designed amphiphilic molecules,macromolecules and polymers represent another important approach for the construction of supramolecular architectures with advanced *** this review,we summarize the important contributions made by Chinese researchers in this field,with emphasis on those reported in the past five years.

关键词： host-guest chemistry drug delivery anticancer and antibacterial photodynamic therapy photothermal therapy antidote transmembrane channel bioimaging and biosensing

Learning Universal Network Representation via Link Prediction by Graph Convolutional Neural Network

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Journal of Social Computing 2021年第1期2卷 43-51页

作者： Weiwei Gu Fei Gao Ruiqi Li jiang zhang College of Information science and Technology Beijing University of Chemical TechnologyBeijing 100029China school of systems science Beijing Normal UniversityBeijing 100875China

Network representation learning algorithms,which aim at automatically encoding graphs into low-dimensional vector representations with a variety of node similarity definitions,have a wide range of downstream *** existing methods either have low accuracies in downstream tasks or a very limited application field,such as article classification in citation *** this paper,we propose a novel network representation method,named Link Prediction based Network Representation(LPNR),which generalizes the latest graph neural network and optimizes a carefully designed objective function that preserves linkage *** can not only learn meaningful node representations that achieve competitive accuracy in node centrality measurement and community detection but also achieve high accuracy in the link prediction *** prove the effectiveness of LPNR on three real-world *** the mini-batch and fixed sampling strategy,LPNR can learn the embedding of large graphs in a few hours.

关键词： network representation link prediction deep learning

A New Estimate for the Dispersion Velocity of Galactic Dark Matter Particles

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Chinese Physics Letters 1998年第8期15卷 617-619页

作者： ZHU Zong-hong WU jiang-hua zhang Yuan-zhong Institute of Theoretical Physics Chinese Academy of SciencesBeijing 100080 department of Astronomy Beijing Normal UniversityBeijing 100875

An independent method is proposed to estimate the dispersion velocity of galactic dark matter *** method is based on the observed quasar-galaxy association samples that are caused by gravitational *** resulting dispersion velocities are much higher than-220km·s^(-1),a value expected from the virial theorem,which shows that the conventional assumption of virialization may be invalid in the halo regions of galaxies.

关键词： particles. dispersion Dispersion

Visualizing the in-Gap States in Domain Boundaries of Ultra-Thin Topological Insulator Films

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Chinese Physics Letters 2021年第7期38卷 106-109页

作者： Jun zhang Junbo Cheng Shuaihua Ji Yeping jiang Key Laboratory of Polar Materials and Devices Department of ElectronicSchool of Physics and Electronic ScienceEast China Normal UniversityShanghai 200241China State Key Laboratory of Low-Dimensional Quantum Physics Department of PhysicsTsinghua UniversityBeijing 100084China

Ultra-thin topological insulators provide a platform for realizing many exotic phenomena such as the quantum spin Hall effect,and quantum anomalous Hall *** effects or states are characterized by quantized transport behavior of edge ***,although these states have been realized in various systems,the temperature for the edge states to be the dominating channel in transport is extremely low,contrary to the fact that the bulk gap is usually in the order of a few tens of milli-electron *** must be other in-gap conduction channels that do not freeze out until a much lower *** we grow ultra-thin topological insulator Bi_(2)Te_(3) and Sb_(2)Te_(3)films by molecular beam epitaxy and investigate the structures of domain boundaries in these *** scanning tunneling microscopy and spectroscopy we find that the domain boundaries with large rotation angles have pronounced in-gap bound states,through which one-dimensional conduction channels are suggested to form,as visualized by spatially resolved *** work indicates the critical role played by domain boundaries in degrading the transport properties.

关键词： spectroscopy temperature properties

MiCPhot:A prime-focus multicolor CCD photometer on the 85-cm Telescope

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Chinese Journal of Astronomy and Astrophysics 2009年第3期9卷 349-366页

作者： Ai-Ying Zhou Xiao-Jun jiang Yan-Ping zhang Jian-Yan Wei National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China department of Astronomy Beijing Normal University Beijing 100875 China

We describe a new BVRI multicolor CCD photometric system situated at the prime focus of the 85-cm telescope at the Xinglong Station of NAOC. Atmospheric extinction effects, photometric accuracy and color calibration dependence of the system are investigated. Additional attention was paid to giving observers guidance in estimating throughput, detection limit, signal-to-noise ratio and exposure time.

关键词： instrumentation photometers CCD photometer- techniques photometric

Intra-day variability of BL Lacertae from 2016 to 2018

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Research in Astronomy and Astrophysics 2021年第10期21卷 187-196页

作者： Tian Li jiang-Hua Wu Nan-Kun Meng Yan Dai Xiao-Yuan zhang department of Astronomy Beijing Normal UniversityBeijing 100875China

We monitored BL Lacertae in the B,V,R and I bands for 14..ights during the period of *** source showed significant intra-day variability on 12 *** performed color-magnitude analysis and found that the source exhibited bluer-when-brighter *** bluer-when-brighter behavior is at least partly caused by the larger variation amplitude at shorter *** variations at different wavelengths are correlated well and show no inter-band time lag.

关键词： galaxies:active BL Lacertae objects:individual:BL Lacertae galaxies:photometry

Structural and functional imaging of brains

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science China Chemistry 2023年第2期66卷 324-366页

作者： Zhichao Liu Ying Zhu Liming zhang Weiping jiang Yawei Liu Qiaowei Tang Xiaoqing Cai jiang Li Lihua Wang Changlu Tao Xianzhen Yin Xiaowei Li Shangguo Hou Dawei jiang Kai Liu Xin Zhou Hongjie zhang Maili Liu Chunhai Fan Yang Tian Shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular EngineeringEast China Normal UniversityShanghai200241China Interdisciplinary Research Center Shanghai Synchrotron Radiation FacilityZhangjiang LaboratoryShanghai Advanced Research InstituteChinese Academy of SciencesUniversity of Chinese Academy of SciencesShanghai201210China State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Chinese Academy of SciencesWuhan National Laboratory for OptoelectronicsWuhan430071China State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022China department of Chemistry Tsinghua UniversityBeijing100084China school of Chemistry and Chemical Engineering Frontiers Science Center for Transformative MoleculesInstitute of Translational MedicineShanghai Jiao Tong UniversityShanghai200240China Interdisciplinary Center for Brain Information Brain Cognition and Brain Disease InstituteShenzhen-Hong Kong Institute of Brain Science-Shenzhen Fundamental Research InstitutionsFaculty of Life and Health SciencesShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen518055China Lingang Laboratory Shanghai201602China school of Biomedical Engineering Shanghai Jiao Tong UniversityShanghai200240China Institute of systems and Physical Biology Shenzhen Bay LaboratoryShenzhen518055China department of Nuclear Medicine Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430022China

Analyzing the complex structures and functions of brain is the key issue to understanding the physiological and pathological *** neuronal morphology and local distribution of neurons/blood vessels in the brain have been known,the subcellular structures of cells remain challenging,especially in the live *** addition,the complicated brain functions involve numerous functional molecules,but the concentrations,distributions and interactions of these molecules in the brain are still poorly *** this review,frontier techniques available for multiscale structure imaging from organelles to the whole brain are first overviewed,including magnetic resonance imaging(MRI),computed tomography(CT),positron emission tomography(PET),serial-section electron microscopy(ss EM),light microscopy(LM)and synchrotron-based X-ray microscopy(XRM).Specially,XRM for three-dimensional(3D)imaging of large-scale brain tissue with high resolution and fast imaging speed is ***,the development of elegant methods for acquisition of brain functions from electrical/chemical signals in the brain is *** particular,the new electrophysiology technologies for neural recordings at the single-neuron level and in the brain are also *** also focus on the construction of electrochemical probes based on dual-recognition strategy and surface/interface chemistry for determination of chemical species in the brain with high selectivity and long-term stability,as well as electrochemophysiological microarray for simultaneously recording of electrochemical and electrophysiological signals in the ***,the recent development of brain MRI probes with high contrast-to-noise ratio(CNR)and sensitivity based on hyperpolarized techniques and multi-nuclear chemistry is ***,multiple optical probes and instruments,especially the optophysiological Raman probes and fiber Raman photometry,for imaging and biosensing in live brain are emphas

关键词： brain structure brain function brain chemistry chemical signal biosensing and bioimaging

Prompt acceleration of a μ^(+) beam in a toroidal wakefield driven by a shaped steep-rising-front Laguerre–Gaussian laser pulse

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Plasma science and Technology 2022年第5期24卷 226-236页

作者： Xiaonan WANG Xiaofei LAN Yongsheng HUANG Youge jiang Chunlei zhang Hao zhang Tongpu YU school of Physics and Astronomy China West Normal UniversityNanchong 637009People's Republic of China Key Laboratory of Beam Technology of Ministry of Education Beijing Normal UniversityBeijing 100875People's Republic of China school of science Shenzhen Campus of Sun Yat-sen UniversityShenzhen 518107People's Republic of China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049People's Republic of China department of Physics National University of Defense TechnologyChangsha 410073People's Republic of China

Recent experimental data for anomalous magnetic moments strongly indicates the existence of new physics beyond the Standard *** μ^(+) bunches are relevant to μ^(+) rare decay,spin rotation,resonance and relaxation(μSR)technology,future muon colliders,and neutrino *** this paper,we propose prompt μ^(+) acceleration in a nonlinear toroidal wakefield driven by a shaped steep-rising-front Laguerre–Gaussian(LG)laser *** analytical model is described,which shows that a μ^(+) beam can be focused by an electron cylinder at the centerline of a toroidal bubble and accelerated by the front part of the longitudinal wakefield.A shaped LG laser with a short rise time can push plasma electrons,generating a higher-density electron sheath at the front of the bubble,which can enhance the acceleration *** acceleration field driven by the shaped steep-rising-front LG laser pulse is about four times greater than that driven by a normal LG laser *** simulation results show that a 300 MeV μ^(+) bunch can be accelerated to 2 GeV and its transverse size is focused from an initial value of w_(0)=5μm to w=2μm in the toroidal bubble driven by the shaped steep-rising-front LG laser pulse with a normalized amplitude of a=22.

关键词： plasma wakefield acceleration muon source laser shaping