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Real Photons Produced from Photoproduction in pp Collisions

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Chinese Physics Letters 2012年第10期29卷 31-34页

作者： fu yong-Ping LI Yun-De Department of Physics and Mathematics Lincang Teachers CollegeLincang 677000 Department of Physics Yunnan UniversityKunming 650091

We calculate the production of real photons originating from the photoproduction in relativistic pp *** Weizsacker–Williams approximation in the photoproduction is *** results agree with the experimental data from the Relativistic Heavy Ion Collider and the Large Hadron *** find that the modification of the photoproduction is more prominent in large transverse momentum regions.

关键词： momentum Collisions transverse

Conservation Laws of a Class of Combined Equations

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Communications in Theoretical Physics 2009年第1期51卷 35-38页

作者： ZHANG Zhi-yong yong Xue-Lin CHEN Yu-fu School of Mathematical Sciences Graduate University of Chinese Academy of Sciences Beijing 100049 China Department of Mathematics and Physics North China Electronic Power University Beijing 102206 China

In this paper, we investigate conservation laws of a class of partial differential equations, which combines the nonlinear telegraph equations and the nonlinear diffusion-convection equations. Moreover, some special conservation laws of the combined equations are obtained by means of symmetry classifications of wave equations uxx = H （x）utt.

关键词： symmetry conservation law multiplier differential characteristic set

Classification and Approximate Solutions to a Class of Perturbed Nonlinear Wave Equations

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Communications in Theoretical Physics 2009年第11期52卷 769-772页

作者： ZHANG Zhi-yong CHEN Yu-fu yong Xue-Lin School of Mathematical Sciences Graduate University of Chinese Academy of Sciences Beijing 100049 China Department of Mathematics and Physics North China Electric Power University Beijing 102206 China

A complete approximate symmetry classification of a class of perturbed nonlinear wave equations isperformed using the method originated from fushchich and ***,large classes of approximate invariantsolutions of the equ... 详细信息

关键词： approximate symmetry Lie reduction approximate solution

Iterative convergence theorems for maximal monotone operators and relatively nonexpansive mappings

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Applied Mathematics(A Journal of Chinese Universities) 2008年第3期23卷 319-325页

作者： WEI Li SU yong-fu ZHOU Hai-yun School of Math. and Statist. Hebei Univ. of Economics and Business Shijiazhuang 050061 China Dept. of Math. Tianjin Polytechnic Univ. Tianjin 300160 China Institute of Appl. Math. and Mech. Ordnance Engineer. College Shijiazhuang 050003 China

In this paper, some iterative schemes for approximating the common element of the set of zero points of maximal monotone operators and the set of fixed points of relatively nonexpansive mappings in a real uniformly smooth and uniformly convex Banach space are proposed. Some strong convergence theorems are obtained, to extend the previous work.

关键词： maximal monotone operator relatively nonexpansive mapping strong convergence zero point fixed point

Numerical Analysis of the Flow Field in a Sloshing Tank with a Horizontal Perforated Plate

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Journal of Ocean University of China 2017年第4期16卷 575-584页

作者： JIN Heng LIU yong LI Huajun fu Qiang Shandong Provincial Key Laboratory of Ocean Engineering Ocean University of ChinaQingdao 266100P.R.China CIMC Offshore Institute Co.Ltd. Yantai 264670P R.China

Liquid sloshing is a type of free surface flow inside a partially filled water *** exerts a significant effect on the safety of liquid transport systems;in particular,it may cause large hydrodynamic loads when the frequency of the tank motion is close to the natural frequency of the *** plates have recently been used to suppress the violent movement of liquids in a sloshing tank at resonant *** this study,a numerical model based on OpenF OAM(Open Source Field Operation and Manipulation),an open source computed fluid dynamic code,is used to investigate resonant sloshing in a swaying tank with a submerged horizontal perforated *** numerical results of the free surface elevations are first verified using experimental data,and then the flow characteristics around the perforated plate and the fluid velocity distribution in the entire tank are examined using numerical *** results clearly show differences in sloshing motions under first-order and third-order resonant *** study provides a better understanding of the energy dissipation mechanism of a horizontal perforated plate in a swaying tank.

关键词： sloshing horizontal perforated plate numerical simulation flow field energy dissipation

Electroless deposition of Ni on template of halloysite and its magnetic property

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中国有色金属学会会刊：英文版 2004年第Z1期14卷 152-156页

作者： fu Yu-bin ZHANG Li-de ZHENG Ji-yong Institute of Solid State Physics Chinese Academy of Sciences Hefei 230031 China Luoyang Ship Material Research Institute Luoyang 471039 China Institute of Solid State Physics Chinese Academy of Sciences Hefei 230031 China Luoyang Ship Material Research Institute Luoyang 471039 China

Halloysite template, a ceramic substrate, is of a hollow cylindric structure, on which the fine Pd nanoparticles are uniformly formed by the reduction of palldate chloride to initiate electroless deposition. The electroless deposition of Ni is catalyzed by the Pd particles, which results in a uniform layer of Ni-P alloy on halloysite. The alloy is of a nanocrystalline structure, of which the average diameter is about 6 nm. After being heat-treated at 400 ℃, it contains both Ni and Ni12P5 crystal, meanwhile, the Ni crystal gets larger with an average size of 51.9 *** content of phosphorous in the Ni layer has a great influence on crystal structure. The metallized halloysite has a higher inherent coercive force, and a much lower saturation magnetization in its as-plated state, while after heattreatment, the inherent coercive force decreases drastically. These magnetic properties have great relationship with the superparamagnetism of Ni nanocrystalline and the stress anisotropy in Ni layer.

关键词： halloysite template electroless deposition Ni nanocrystalline inherent coercive force

New iterative schemes for strongly relatively nonexpansive mappings and maximal monotone operators

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Applied Mathematics(A Journal of Chinese Universities) 2010年第2期25卷 199-208页

作者： WEI Li SU yong-fu ZHOU Hai-yun School of Mathematics and Statistics Hebei University of Economics and Business Shijiazhuang 050061 China Department of Mathematics Tianjin Polytechnic University Tianjin 300160 China Institute of Mathematics and Computer Sciences Hebei Normal University Shijiazhuang 050016 China

In this paper, some new iterative schemes for approximating the common element of the set of fixed points of strongly relatively nonexpansive mappings and the set of zero points of maximal monotone operators in a real uniformly smooth and uniformly convex Banach space are proposed. Some weak convergence theorems are obtained, which extend and complement some previous work.

关键词： Strongly relatively nonexpansive mapping maximal monotone operator zero point fixed point,weak convergence.

A Localized Inter-Actuator Network Topology Repair Scheme for Wireless Sensor and Actuator Networks

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China Communications 2019年第2期16卷 215-232页

作者： yong Feng Hai Liu Jie Yang Xiaodong fu Yunnan Key Lab of Computer Technology Applications Kunming University of Science and Technology Nanjing Changjiang Electronics Group co. ltd

Node failure is one of the most severe problems that wireless sensor and actuator networks(WSANs) have to deal with. The failure of actuator nodes, in particular, may result in substantial consequences such as network partitioning, incorrect and incomplete decision execution for WSANs. This paper proposes an efficient localized scheme, called LANTR, to repair the damaged topology of inter-actuator network while single actuator node paralyzes. For the failure of an ordinary actuator node, LANTR can rapidly repair the topology through relocating only one-hop neighbors of the failure node, meanwhile, keep the original topology structure as much as possible. Given the magnitude of cut vertex actuators playing on the connectivity, LANTR designs a novel method for each cut vertex to select out a specific guardian node with the minimum degree or minimum cumulative degree from its neighbors, which can reduce the repair influence on the original topology and effectively reduce the coverage loss rate. The performance of the proposed scheme is evaluated and compared with several existing representative topology repair schemes, and the results indicate that LANTR can more effectively and efficiently repair the topology of inter-actuator networks.

关键词： wireless sensor and actuator networks inter-actuator networks topology repair coverage loss rate

Study on hydrodynamic vibration in fluidic flowmeter

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第9期8卷 1422-1428页

作者： WANG Chi-yu ZOU Jun fu Xin YANG Hua-yong Institute State Key Laboratory of Fluid Power Transmission amt Control Zhejiang University Hangzhou 310027 China

The characteristics of the fluidic flowmeter,which is a combination of impinged concave wall and bistable fluid amplifier,is investigated by experimental studies and numerical simulations. The numerical approaches are utilized to examine the time dependent flow field and pressure field inside the proposed flowmeter. The effect of varying structural parameters on flow characteristics of the proposed fluidic flowmeter is investigated by computational simulations for the optimization. Both the simulation and experimental results disclose that the hydrodynamic vibration,with the same intensity,frequency and 180° phase shift,occurs at axisymmetric points in the feedback channel of the fluidic flowmeter. Using the structural combination of impinged concave wall and bistable fluid amplifier and differential signal processing technique,a novel fluidic flowmeter with excellent immunity and improved sensibility is developed.

关键词： Flowmeter Fluidic Hydrodynamic vibration Coanda effect