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Journal of Social Computing 2021年第1期2卷 27-42页

作者： hong xiong Ying Fan School of Systems Science Beijing Normal UniversityBeijing 100875China

In the field of Venture Capital(VC),researchers have found that VC companies are more likely to jointly invest with other VC *** paper attempts to realize a semi-supervised community detection of the VC network based on the data of VC networking and the list of industry *** main research method is to design the initial label of community detection according to the evolution of components of the VC industry *** results show that the community structure of the VC network has obvious distinguishing characteristics,and the aggregation of these communities is affected by the type of institution,the source of capital,the background of personnel,and the field of investment and the geographical ***,by comparing the results of the semi-supervised community detection algorithm with the results of community detection using extremal optimization,it can be shown to some extent that the semi-supervised community detection results in the VC network are more accurate and reasonable.

关键词： Venture Capital(VC) complex network community detection

Algebraic Bethe Ansatz for the Osp(1|2) Model with Reflecting Boundaries

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Communications in Theoretical Physics 2001年第7期36卷 19-24页

作者： YUE Rui-hong xiong Chuan-Hua Institute of Modern Physics Northwest University Xi''an 710069 China Institute of Modern Physics Northwest University Xi''an 710069 China

In the framework of graded quantum inverse scattering method, we obtain the eigenvalues and the eigenvectors of the Osp(l|2) model with reflecting boundary conditions in FBF background. The corresponding Bathe ansatz ... 详细信息

关键词： Osp(1|2), algebraic Bethe ansatz, reflection equation

Linear-Quadratic Optimal Control Problems for Mean-Field Stochastic Differential Equation with Lévy Process

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Communications on Applied Mathematics and Computation 2022年第4期4卷 1386-1415页

作者： hong xiong Maoning Tang Qingxin Meng Department of Mathematics Zhejiang Normal UniversityJinhua 321004ZhejiangChina Department of Mathematical Sciences Huzhou UniversityHuzhou 313000ZhejiangChina

This paper investigates a linear-quadratic mean-field stochastic optimal control problem under both positive definite case and indefinite case where the controlled systems are mean-field stochastic differential equations driven by a Brownian motion and Teugels mar-tingales associated with Lévy *** either case,we obtain the optimality system for the optimal controls in open-loop form,and by means of a decoupling technique,we obtain the optimal controls in closed-loop form which can be represented by two Riccati differen-tial ***,the solvability of the optimality system and the Riccati equations are also obtained under both positive definite case and indefinite case.

关键词： Mean-field Teugels martingales Linear-quadratic Optimal control Riccati equations Feedback representation

Intrinsic Decoherence on Two-Qubit Heisenberg XX Chain

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Communications in Theoretical Physics 2007年第5期47卷 811-815页

作者： HE Zheng-hong xiong Zu-hong HU Dong-Mei School of Physics Southwest University Chongqing 400715 China

Quantum teleportation is investigated by using the entangled states of two-qubit Heisenberg XX chain in an external uniform magnetic field as resources in the model of Milburn＇s intrinsic decoherence. Though intrinsic decoherence on quantum entanglement and quantum teleportation exerts different effects in different initial systems, proper magnetic fields and probabilities of different eigenstates in the initial states can weaken the effects.

关键词： Heisenberg chain fidelity intrinsic decoherence entanglement

Effect of particle motion on the hydraulic collection of coarse spherical particles

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Acta Mechanica Sinica 2020年第1期36卷 72-81页

作者： Yuxiang Chen hong xiong Hui Cheng Chunliang Yu Jiahua Xie Institute of Deep-sea Science and Engineering Chinese Academy of SciencesSanya572000China

Deep-sea mining,through which shattered coarse solid mineral resources are hydraulically collected and transported,is a promising solution for problems associated with resource *** study reports some interesting phenomena observed in a series of upward pumping experiments conducted on a coarse sphere with a 2-cm *** sphere was hydraulically lifted using a vertical pipe with a 5-cm radius suspended above the ***,the tangential motion benefited the *** discrete element method-computational fluid dynamics was used to investigate the collection mechanism;this method was used to simulate the collecting processes of the sphere under different initial motion *** simulated results agreed well with the experimental *** vortices over the sphere induced by its motion coupled with the main stream mainly provide sufficient lift force to raise the sphere.

关键词： Solid-liquid two-phase flow Deep-sea mining CFD-DEM

Microstructure and antibacterial property of stainless steel implanted by Cu ions

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中国有色金属学会会刊：英文版 2004年第Z1期14卷 328-331页

作者： XU Bo-fan NI hong-wei xiong Ping-yuan xiong Juan DAN Zhi-gang School of Material and Metallurgy Wuhan University of Science and Technology Wuhan 430081 China School of Material and Metallurgy Wuhan University of Science and Technology Wuhan 430081 China School of Medicine Science Wuhan 430081 China School of Material and Metallurgy Wuhan University of Science and Technology Wuhan 430081 China School of Material and Metallurgy Wuhan University of Science and Technology Wuhan 430081 China

Copper ions were implanted into AISI 304 austenitic stainless steel by metal vapor vacuum are (MEVVA) with 60 - 100 keV energy and a dose range (0.2 - 5.0) × 1017 cm-2. Then Cu-implanted stainless steel was treated by a special antibacterial treatment. Antibacterial rates of Cu-implanted stainless steel, Cu-implanted stainless steel with special antibacterial treatment and un-implanted stainless steel were obtained by agar plate method. Phase composition in the implanted layer was analyzed by glancing X-ray diffraction (GXRD). Microstructure of antibacterial stainless steel was observed with transmission electron microscopy (TEM), and changes of the bacterium appearance after 24 h antibacterial action on the surface of un-implanted and Cu-implanted stainless steel with antibacterial treatment were observed with bio-TEM respectively. The results show that stainless steel obtains antibacterial property against E. coli when the Cu ions dose approaches to the saturated one. A suitable amount of Cu-rich phase uniformly disperses on the surface of Cu-implanted stainless steel that is treated by the special antibacterial treatment. The Cu-rich phase naked on the surface has a function of damage to pericellular membrane and cell wall,the pericellular membrane is thickened and the karyon degraded, and finally, bacteria die. Cu-rich phase naked on the surface endows stainless steel with best antibacterial property.

关键词： stainless steel copper ion implantation antibacterial property

Aerodynamic modeling and stability analysis of a high-speed train under strong rain and crosswind conditions

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2011年第12期12卷 964-970页

作者： Xue-ming SHAO Jun WAN Da-wei CHEN hong-bing xiong Department of Mechanics Zhejiang University Hangzhou 310027 China National Engineering Laborat ory for System Integration of High-Speed Train （South） CSR Qingdao Sifang Co. Ltd. Qingdao 266111 China

With the development of high-speed train,it is considerably concerned about the aerodynamic characteristics and operation safety issues of the high-speed train under extreme weather *** aerodynamic performance of a high-speed train under heavy rain and strong crosswind conditions are modeled using the Eulerian two-phase model in this *** impact of heavy rainfall on train aerodynamics is investigated,coupling heavy rain and a strong *** show that the lift force,side force,and rolling moment of the train increase significantly with wind speed up to 40 m/s under a rainfall rate of 60 mm/*** considering the rain and wind *** increases of the lift force,side force,and rolling moment may deteriorate the train operating safety and cause the train to overturn.A quasi-static stability analysis based on the moment balance is used to determine the limit safety speed of a train under different rain and wind *** results can provide a frame of reference for the train safe operation under strong rain and crosswind conditions.

关键词： High-speed train Aerodynamic characteristics Multiphase flow Rain Crosswind Overturning

Experimental investigation of critical suction velocity of coarse solid particles in hydraulic collecting

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Acta Mechanica Sinica 2021年第4期37卷 613-619,I0002页

作者： Yan Zhang Xiaobing Lu Xuhui Zhang Yuxiang Chen hong xiong Lianghua Zhang Institute of Mechanics Chinese Academy of SciencesBeijing 100190China School of Engineering Science University of Chinese Academy of SciencesBeijing 100049China Institute of Deep-Sea Science and Engineering Chinese Academy of SciencesSanya 572000China

Hydraulic collecting and pipe transportation are regarded as an efficient way for exploiting submarine mineral resources such as the manganese nodules and *** particles on the surface of the sea bed are sucked by a pipe during the mining and crushing of the *** this paper,the critical suction velocity for lifting the coarse particles is investigated through a series of laboratory experiments,and the solid-liquid two-phase flow characteristics are *** on the dimensional analysis,the geometric similarity is found between actual exploitation process and model test with the same kind of *** controlling dimensionless parameters such as the hydraulic collecting number,the relative coarse particle diameter,the relative suction height,and the density ratio are deduced and *** results show that the logarithm in base 10 of the hydraulic collecting number increases approximately linearly with the increase of the relative suction height,while decreases with the relative particle diameter.A fitting formula for predicting the critical suction velocity is presented according to the experimental results.

关键词： Hydraulic collecting Critical suction velocity Coarse particles Deep sea mining Dimensional analysis

Numerical study on the aerodynamic performance and safe running of high-speed trains in sandstorms

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2011年第12期12卷 971-978页

作者： hong-bing xiong Wen-guang YU Da-wei CHEN Xue-ming SHAO Department of Mechanics Zhejiang University Hangzhou 310027 China National Engineering Laboratory for System Integration of High-Speed Train （South） CSR Qingdao Sifang Co. Ltd. Qingdao 266111 China

The influence of sandstorms on train aerodynamic performance and safe running was studied in response to the frequent occurrence of sandstorm weather in north *** Eulerian two-phase model in the computational fluid dynamic (CFD) software FLUENT,validated with published data,was used to solve the gas-solid multiphase flow of a sandstorm around a *** train aerodynamic performance under different sandstorm levels and no sand conditions was then *** showed that in sandstorm weather,the drag,lift,side forces and overturning moment increase by variable *** on a numerical analysis of aerodynamic characteristics,an equation of train stability was also derived using the theory of moment balance from the view of dynamics.A recommended speed limit of a train under different sandstorm levels was calculated based on the stability analysis.

关键词： High-speed train Sandstorm Gas-solid multiphase Eulerian two-phase model Aerodynamic Safety Speed limit

Efect of Al Content on the Corrosion Behavior of Extruded Dilute Mg–Al–Ca–Mn Alloy

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Acta Metallurgica Sinica(English Letters) 2023年第1期36卷 77-90页

作者： Bao‑Chang Liu Shuai Zhang hong‑Wei xiong Wen‑Hao Dai Yin‑Long Ma College of Construction Engineering Jilin UniversityChangchun 130026China Key Laboratory of Drilling and Exploitation Technology in Complex Conditions of Ministry of Natural Resources Changchun 130026China

The microstructure,extrusion texture and corrosion behavior of extruded dilute Mg–Al–Ca–Mn alloy with diferent Al contents were *** corrosion rate of the alloy was more sensitive to the Fe *** 1.2 wt%Al showed the lowest corrosion rate,which was mainly attributed to the weakening of the cathode efect caused by the increase of the Al and the decrease of the Fe in the precipitated *** grains,stronger basal surface texture and higher corrosion potential deriving from the higher Al content of the matrix also further enhanced the corrosion resistance of the matrix.

关键词： Dilute magnesium alloys Corrosion behavior Al content Fe impurity Second phase