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Nano Research 2021年第3期14卷 584-589页

作者： Yan-Fang Zhang Jinbo Pan Huta Banjade Jie Yu Hsin Lin Arun Bansil Shixuan Du Qimin Yan Institute of Physics&University of Chinese Academy of Sciences Chinese Academy of SciencesBeijing100190China Department of Physics Temple UniversityPhiladelphiaPA19122USA Institute of Physics “Academia Sinica”Taipei11529Taiwan Physics Department Northeastern UniversityBostonMA02115USA

We propose a novel class of two-dimensional(2D)Dirac materials in the MX family(M=Be,Mg,Zn and Cd,X=Cl,Br and I),which exhibit graphene-like band structures with linearly-dispersing Dirac-cone states over large energy scales(0.8–1.8 eV)and ultra-high Fermi velocities comparable to ***-orbit coupling opens sizable topological band gaps so that these compounds can be effectively classified as quantum spin Hall *** electronic and topological properties are found to be highly tunable and amenable to modulation via anion-layer substitution and vertical electric *** structures of several members of the family are shown to host a Van-Hove singularity(VHS)close to the energy of the Dirac *** enhanced density-of-states associated with these VHSs could provide a mechanism for inducing topological *** presence of sizable band gaps,ultra-high carrier mobilities,and small effective masses makes the MX family promising for electronics and spintronics applications.

关键词： two-dimensional Dirac materials density functional theory topological properties

FROM UNWEIGHTED TO WEIGHTED GENERALIZED FAREY ORGANIZED TREE AND THE PYRAMID NETWORKS

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Journal of Systems Science & Complexity 2010年第4期23卷 681-700页

作者： Yong LI·Jinqing FANG·Qiang LIU China Institute of Atomic Energy,Beijing 102413,China. China Institute of Atomic Energy

Generalized Farey tree network （GFTN） and generalized Farey organized pyramid network （CFOPN） model are proposed, and their topological characteristics are studied by both theoretical analysis and numerical simulations, which are in good accordance with each other. Then weighted GFTN is studied using cumulative distributions of its Farey number value, edge weight, and node strength. These results maybe helpful for future theoretical development of hybrid models.

关键词： Generalized Farey organized pyramid network topological properties weighted generalized Farey tree network.

Manufacturing enterprise collaboration network:An empirical research and evolutionary model

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Chinese Physics B 2020年第8期29卷 553-563页

作者： Ji-Wei Hu Song Gao Jun-Wei Yan Ping Lou Yong Yin School of Information Engineering Wuhan University of TechnologyWuhan 430070China Hubei Key Laboratory of Broadband Wireless Communication and Sensor Wuhan University of TechnologyWuhan 430070China

With the increasingly fierce market competition,manufacturing enterprises have to continuously improve their competitiveness through their collaboration and labor division with each other,*** manufacturing enterprise collaborative network(MECN)through their collaboration and labor division is an effective guarantee for obtaining competitive *** explore the topology and evolutionary process of MECN,in this paper we investigate an empirical MECN from the viewpoint of complex network theory,and construct an evolutionary model to reproduce the topological properties found in the empirical ***,large-size empirical data related to the automotive industry are collected to construct an *** analysis indicates that the MECN is not a scale-free network,but a small-world network with ***-world property indicates that the enterprises can respond quickly to the market,but disassortativity shows the risk spreading is fast and the coordinated operation is ***,an evolutionary model based on fitness preferential attachment and entropy-TOPSIS is proposed to capture the features of ***,the evolutionary model is compared with a degree-based model in which only node degree is taken into *** simulation results show the proposed evolutionary model can reproduce a number of critical topological properties of empirical MECN,while the degree-based model does not,which validates the effectiveness of the proposed evolutionary model.

关键词： manufacturing enterprise collaboration network complex network topological properties fitness preferential attachment

Room temperature quantum anomalous Hall insulator in honeycomb lattice, RuCS_(3), with large magnetic anisotropy energy

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Chinese Physics B 2023年第5期32卷 604-609页

作者：赵永春朱铭鑫李胜世李萍 School of Physics and Technology University of JinanJinan 250022China Institute of Spintronics University of JinanJinan 250022China

The quantum anomalous Hall(QAH) effect has attracted enormous attention since it can induce topologically protected conducting edge states in an intrinsic insulating material. For practical quantum applications, the main obstacle is the non-existent room temperature QAH systems, especially with both large topological band gap and robust ferromagnetic order. Here, according to first-principles calculations, we predict the realization of the room temperature QAH effect in a two-dimensional(2D) honeycomb lattice, RuCS_(3) with a non-zero Chern number of C = 1. Especially, the nontrivial topology band gap reaches up to 336 me V for RuCS_(3). Moreover, we find that RuCS_(3) has a large magnetic anisotropy energy(2.065 me V) and high Curie temperature(696 K). We further find that the non-trivial topological properties are robust against the biaxial strain. The robust topological and magnetic properties make RuCS_(3) have great applications in room temperature spintronics and nanoelectronics.

关键词： quantum anomalous Hall(QAH)effect room temperature magnetic anisotropy energy topological properties first-principles calculations

DEAON： dynamically-evolving active overlay networks for scalable information retrieval

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High Technology Letters 2007年第4期13卷 413-417页

作者：黄新力 Ma Fanyuan Department of Computer Science and Technology East China Normal University Shanghai 200041 P.R. China Department of Computer Science and Engineering Shanghai Jiaotong University Shanghai 200030 P.R. China

In this paper, we propose the dynamically-evolving active overlay network （DEAON）, which is an efficient, scalable yet simple protocol to facilitate applications of decentralized information retrieval in P2P networks. DEAON consists of three novel components ： a Desirable Topology Construction and Adaptation algorithm to guide the evolution of the overlay topology towards a small-world-like graph; a Semantic-based Neighbor Selection scheme to conduct an online neighbor ranking; a Topology-aware Intelligent Search mechanism to forward incoming queries to deliberately selected neighbors. We deploy and compare DEAON with other several existing distributed search techniques over static and dynamic environments. The results indicate that DEAON outperforms its competitors by achieving higher recall rate while using much less network resources, in both of the above environments.

关键词： active overlay networks information retrieval search topological properties small world

Zeeman-Like Topologies in Special and General Theory of Relativity

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Journal of Modern Physics 2016年第7期7卷 627-641页

作者： Ravindra Saraykar Sujatha Janardhan Department of Mathematics R T M Nagpur University Nagpur India Department of Mathematics St. Francis De Sales College Nagpur India

This is a short review article in which we discuss and summarize the works of various researchers over past four decades on Zeeman topology and Zeeman-like topologies, which occur in special and general theory of rela... 详细信息

关键词： Zeeman Topology Fine Topologies on Minkowski Space Zeeman-Like Topologies in General Relativity Homeomorphism Group Lorentz Group Conformal Group topological properties

LI-ideal Spaces of Lattice Implication Algebra

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Chinese Quarterly Journal of Mathematics 2007年第4期22卷 504-511页

作者： CHEN Shu-wei JIANG Bao-qing YANG Xiao-wei School of Electrical Engineering Zhengzhou University Zhengzhou 450001 China Institute of Data ＆ Knowledge Engineering Henan University Kaifeng 475001 China Department of Mathematics Southwest Jiaotong University Chengdu 610031 China

In this paper, a topological space based on LI-ideals of a lattice implication algebra is constructed, and its topological properties, such as separability, compactness and connectedness are discussed.

关键词： lattice implication algebra LI-ideal topological space topological properties