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Abelian Hearts of Twin Cotorsion Pairs on Extriangulated Categories

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Algebra Colloquium 2023年第3期30卷 449-466页

作者： qiong huang Panyue Zhou Key Laboratory of Computing and Stochastic Mathematics(Ministry of Education)School of Mathematics and Statistics Hunan Normal University Changsha 410081China School of Mathematics and Statistics Changsha University of Science and Technology Changsha 410114China

It was shown recently that the heart of a twin cotorsion pair on an extriangulated category is *** this article,we consider a special class of hearts of twin cotorsion pairs induced by d-cluster tilting subcategories in extriangulated *** give a necessary and sufficient condition for such hearts to be *** particular,we can also see that such hearts are *** an application,this generalizes the work by Liu in the exact case,thereby providing new insights into the triangulated case.

关键词： hearts cotorsion pairs extriangulated categories d-cluster tilting subcate-

A Catalog of Collected Debris Disks:Properties,Classifications and Correlations between Disks and Stars/Planets

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Research in Astronomy and Astrophysics 2023年第8期23卷 65-81页

作者： Peng-Cheng Cao qiong Liu Neng-hui Liao Qian-Cheng Yang Dong huang Department of Physics College of PhysicsGuizhou UniversityGuiyang 550025China Institute of Astronomy University of CambridgeMadingley RoadCambridge CB30HAUK

We have collected a catalog of 1095 debris disks with properties and classification(resolved,planet,gas)*** the catalog,we defined a less biased sample with 612 objects and presented the distributions of their stellar and disk properties to search for correlations between disks and *** found debris disks were widely distributed from B to M-type stars while planets were mostly found around solar-type stars,gases were easier to detect around early-type stars and resolved disks were mostly distributed from A to G-type *** fractional luminosity dropped off with stellar age and planets were mostly found around old stars while gas-detected disks were much *** dust temperature of both one-belt systems and cold components in two-belt systems increased with distance while decreasing with stellar *** addition,we defined a less biased planet sample with 211 stars with debris disks but no planets and 35 stars with debris disks and planets and found the stars with debris disks and planets had higher metallicities than stars with debris disks but no *** the 35 stars with debris disks and planets,we found the stars with disks and cool Jupiters were widely distributed with age from 10 Myr to 10 Gyr and metallicity from-1.56 to 0.28 while the other three groups tended to be old(>4Gyr)and metal-rich(>-0.3).In addition,the eccentricities of cool Jupiters are distributed from 0 to 0.932,wider than the other three types of planets(<0.3).

关键词： catalogs-infrared-stars (stars:)planetary systems-methods statistical

Potential metal-related strategies for prevention and treatment of COVID-19

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Rare Metals 2022年第4期41卷 1129-1141页

作者： Ya-qiong Ni hui-hui Zeng Xian-Wen Song Jun Zheng hui-qiong Wu Chun-Tai Liu Yi Zhang Hunan Provincial Key Laboratory of Micro and Nano Materials Interface Science College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China Hanshan Normal University Chaozhou 521041China College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518071China Key Laboratory of Materials Processing and Mold(Zhengzhou University) Ministry of EducationZhengzhou 450002China

The coronavirus disease 2019(COVID-19)caused by severe acute respiratory syndrome coronavirus 2(SARS-CoV-2) has posed severe threats to human health,public safety,and the global *** nutrient elements can directly or indirectly take part in human immune responses,and metal-related drugs have served as antiviral drugs and/or enzyme inhibitors for many years,providing potential solutions to the prevention and treatment of ***-based drugs are currently under a variety of chemical structures and exhibit wide-range bio activities,demonstrating irreplaceable advantages in *** review is an intention to summarize recent progress in the prevention and treatment strategies against COVID-19 from the perspective of metal *** current and potential utilization of metal-based drugs is briefly ***,metallohydrogels that have been shown to present superior antiviral activities are stressed in the paper as potential drugs for the treatment of COVID-19.

关键词： COVID-19 SARS-CoV-2 Metal-related drugs Metal nutrient elements Metallohydrogel

On Hamiltonian Property of Cayley Digraphs

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Acta Mathematicae Applicatae Sinica 2024年第2期40卷 547-556页

作者： Fang DUAN qiong-xiang huang School of Mathematics Science Xinjiang Normal UniversityUrumqi 830017China College of Mathematics and Systems Science Xinjiang UniversityUrumqi 830017China

Let G be a finite group generated by S and C(G,S) the Cayley digraphs of G with connection set *** this paper,we give some sufficient conditions for the existence of hamiltonian circuit in C(G,S),where G=Zm×H is a semiproduct of Zmby a subgroup H of *** particular,if m is a prime,then the Cayley digraph of G has a hamiltonian circuit unless G=Zm×*** addition,we introduce a new digraph operation,called φ-semiproduct of Γ1by Γ2and denoted by Γ1×Γ_φΓ2,in terms of mapping φ:V(Γ2)→{1,-1}.Furthermore we prove that C(Zm,{a})×_φ C(H,S) is also a Cayley digraph if φ is a homomorphism from H to{1,-1} ≤ Zm~*,which produces some classes of Cayley digraphs that have hamiltonian circuits.

关键词： Cayley digraphs hamiltonian circuit external semidirect product

Joint modelling of location and scale parameters of the skew-normal distribution

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Applied Mathematics(A Journal of Chinese Universities) 2014年第3期29卷 265-272页

作者： LI hui-qiong WU Liu-cang Department of statistics Yunnan Unversity Faculty of Science Kunming University of Science and Technology

Joint location and scale models of the skew-normal distribution provide useful ex- tension for joint mean and variance models of the normal distribution when the data set under consideration involves asymmetric outcomes. This paper focuses on the maximum likelihood estimation of joint location and scale models of the skew-normal distribution. The proposed procedure can simultaneously estimate parameters in the location model and the scale model. Simulation studies and a real example are used to illustrate the proposed methodologies.

关键词： joint mean and variance models of the normal distribution joint location and scale models ofthe skew-normal distribution maximum likelihood estimators skew-normal distribution.

Trees,Unicyclic Graphs and Bicyclic Graphs with Exactly Two Q-main Eigenvalues

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Acta Mathematica Sinica,English Series 2013年第11期29卷 2193-2208页

作者： Lin CHEN qiong Xiang huang College of Medical Engineering and Technology Xinjiang Medical University College of Mathematics and System Science Xinjiang University

The signless Laplacian matrix of a graph G is defined to be the sum of its adjacency matrix and degree diagonal matrix, and its eigenvalues are called Q-eigenvalues of G. A Q-eigenvalue of a graph G is called a Q-main eigenvalue if it has an eigenvector the sum of whose entries is not equal to zero. In this work, all trees, unicyclic graphs and bicyclic graphs with exactly two Q-main eigenvalues are determined.

关键词： Signless laplacian Q-main eigenvalue semi-edge walk matrix

甲烷在ZnO表面反应制合成气的微观机理研究

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原子与分子物理学报 2025年第6期42卷 1-9页

作者：黄琼谊楼波丁佳欣王水安华南理工大学电力学院广州510640

利用密度泛函(DFT)和过渡态理论对甲烷分子在ZnO表面的微观反应过程进行第一性原理研究,通过建立ZnO表面的吸附模型,计算了吸附能、过渡态参数和态密度,探讨了甲烷分子在氧化锌晶体表面H解离以及H_(2)和CO的生成过程,结果表明:CH_(4)在Z... 详细信息

利用密度泛函(DFT)和过渡态理论对甲烷分子在ZnO表面的微观反应过程进行第一性原理研究,通过建立ZnO表面的吸附模型,计算了吸附能、过渡态参数和态密度,探讨了甲烷分子在氧化锌晶体表面H解离以及H_(2)和CO的生成过程,结果表明:CH_(4)在ZnO(010)表面的最佳吸附位点为Zn位,吸附能为-4.65 kcal/mol,甲烷在氧化锌ZnO(010)面四次解离H(反应动力学上最有利路径)所需克服的能垒分别为38.6 kcal/mol、90.8 kcal/mol、53.2 kcal/mol和35.8 kcal/mol,其中甲烷第二次解离H_(2)过程能垒最高,是反应过程的决速步,降低该基元反应的活化能是关键,而-OH的形成抑制了-CH_(3)的解离.氧空位的形成增加活性位点的数量与提高位点的活性.甲烷与氧化锌表面的反应有两次H_(2)生成反应,第一次生成H_(2)的反应难度较大.

关键词：化学链重整甲烷反应机理密度泛函理论过渡态

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Polar Sets and Relative Dimension for Generalized Brownian Sheet

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Acta Mathematicae Applicatae Sinica 2007年第4期23卷 579-592页

作者： hui-qiong Li Zhen-long Chenu College of Statistics and Mathematics Zhejiang Gongshang University Hangzhou 310035 China

Let W^～=^～{W^～（t）; t∈ R＋^N） be a d-dimensional N-parameter generalized Brownian sheet. Necessary and sufficient conditions for a compact set E × F to be a polar set for （t,W^～（t）） are proved. It is also proved that if 2N ≤αd, then for any compact set E ∩→ R〉^N,d-2/α Dim E≤inf{dim F：F∈B（R^d）,P{W^～（E）∩F≠0}〉0}≤d-2/βDimE,and if 2N〉αd, then for any compact set F∪→R^d／{0},α/2（d-DimF）≤inf{dimE：E∈B（R〉^N）,P{W^～（E）∩F≠0}〉0}≤β/2（d-DimF）,where B（R^d） and B（R〉^N） denote the Borel σ-algebra in R^d and in R〉^N respectively, dim and Dim are Hausdorff dimension and Packing dimension respectively.

关键词： Generalized Brownian sheet polar set Hausdorff dimension packing dimension

Defective MnO_(2) functional separator coating as effective polysulfide mediators for lithium–sulfur batteries

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Tungsten 2024年第3期6卷 536-543页

作者： Yan-Qi Feng qiong-qiong Lu hui Liu School of Materials&Environment Engineering Chengdu Technological UniversityChengdu 611730China School of Materials Science and Engineering Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic MaterialsShaanxi University of Science and TechnologyXi'an 710021China Institute of Materials Henan Key Laboratory of Advanced Conductor MaterialsHenan Academy of SciencesZhengzhou 450046China Institute of Materials Chemistry Leibniz Institute for Solid State and Materials Research(IFW)Dresden e.V.Dresden 01069Germany

Advanced energy storage systems are in urgent need nowadays due to the rising demand in mobile devices and electric vehicles[1].Lithium–sulfur(Li–S)batteries are intensively studied due to the high theoretical specific capacity(1675 m Ah·g^(-1))and energy density(2600 Wh·kg^(-1)),as well as natural abundant and environmentally friendly of sulfur.

关键词： lithium coating sulfur