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The Self-assembling and Application of Inorganic Anti-bacterial material Made of Natural Nanoporous Carrier

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Journal of Wuhan university of Technology(materials science) 2008年第6期23卷 771-774页

作者：孙春宝 school of Civil and Environmental engineering University of Science and Technology Beijing

The inorganic antimicrobial material was inhibited to the microbes with the added metal ion,*** primary wet product carrying 5%-10% zinc ion was generated under the following conditions：temperature was 95 ℃,solution zinc concentration was 1.2-2.0 mol/L,and the ratio of Zn solution to zeolite weight was 5：*** final stable product was manufactured after baking in an oven for 1-3.h at the temperature of 500-900 ℃.The baked material was tested for its disinfection effectiveness and coloring effect when mixed with paint *** on the final batch of tests,the zinc content of this anti-microbial product was further optimized.

关键词： inorganic antimicrobial nanoporous material antibacterial coating zeolite self-assembling

A Powerful Simulation Language for Large and Complex Models

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Systems science and Systems engineering 1998年第2期8卷 106-114页

作者： LIN Jian The Management school, beijing university of {3. & astronautics beijing, 100083, china

To tackle large and complex problems, a modern simulation modeling system must posses six characteristics: simplicity, user extensibility, object orientation, flexibility, capability, and initialization. Simplicity allows those users who are nonprofessionals in simulation modeling to use the system to build their models. User extensibility is a self perfection mechanism by which the user is able to extend the abilities of the system for large and complex problems. Object oriented methodology is a natural way of simulation modeling. Flexibility can increase the range to which the system can be applied. Powerful systems satisfy demand for ever growing complicated problems. Efficient facilities for the initialization of a model reduces the pain of initializing complicated models. The GPMS language owns each of these features. It is an English like user extensible simulation language, providing simplicity for less experienced users and allowing new data types to be defined to increase its ability. It gives the user a choice between object oriented and function oriented modeling style. Its flexibility in building models prevents the user from obeying strict rules. Its powerful constructs allow the user to describe arbitrarily complicated models. Intelligent model initialization reduces the user’s effort greatly.

关键词： simulation language simulation modeling user extensibility object orientation GPMS activity cycle diagram the Three Phase Approach

Unmanned air/ground vehicles heterogeneous cooperative techniques:Current status and prospects

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science china(Technological sciences) 2010年第5期53卷 1349-1355页

作者： DUAN HaiBin & LIU SenQi National Key Laboratory of science and Technology on Holistic Flight Control,school of Automation science and Electrical {3.,beijing university of aeronautics and astronautics,beijing 100191,china 1. National Key Laboratory of science and Technology on Holistic Flight Control School of Automation Science and Electrical Engineering Beijing University of Aeronautics and Astronautics Beijing 100191 China

Multiple unmanned air/ground vehicles heterogeneous cooperation is a novel and challenging *** cooperative techniques can widen the application fields of unmanned air or ground vehicles,and enhance the effectiveness of implementing detection,search and rescue *** paper mainly focused on the key issues in multiple unmanned air/ground vehicles heterogeneous cooperation,including heterogeneous flocking,formation control,formation stability,network control,and actual *** main problems and future directions in this field were also analyzed in *** innovative technologies can significantly enhance the effectiveness of implementing complicated tasks,which definitely provide a series of novel breakthroughs for the intelligence,integration and advancement of future robot systems.

关键词： unmanned air vehicle(UAV) unmanned ground vehicle(UGV) heterogeneous cooperation

Investigation on Relationship between Lubricating Performance and Stability of Emulsion for Cold Strip Rolling

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china Petroleum Processing & Petrochemical Technology 2010年第3期12卷 54-58页

作者： Sun Jianlin Wang Yizhu La Rui Wang Bing (school of material science and {3.,university of science and Technology beijing,beijing 100083) Univ Sci & Technol beijing Sch Mat Sci & Engn Beijing 100083 Peoples R China

The influence of the ratio and content of emulsifiers on the stability of anion emulsions for cold strip rolling was investigated in this paper. The present study also investigated the effects of HLB （hydrophile-lipophile balance） value and emulsifier content on the stability of no-ionic emulsions. Based on the effects of different stabilities and different concentrations of emulsions on the adsorptivity and friction coefficients, good lubricating performance was obtained when the amount of the separated oil and soap （SOS） accounted for 2.5%. The wearing scar of the steel balls also indicated the improvements in tribological properties after using the emulsion. Thus, the preparation of emulsion should be regulated according to different rolling conditions.

关键词： lubrication oil-water emulsion stability lubricating performance

Thermodynamic Behavior of Manganese and Phosphorus between Liquid Iron and CaO-MgO-SiO_2-Al_2O_3.Fe_tO-MnO-P_2O_5 Slags

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Journal of university of science and Technology beijing 2001年第3期8卷 171-176页

作者： Bo Song, Seon-Hyo Kim, Jinghong Mao, Qing Lin Metallurgy school, university of science and Technology {3., beijing 100083, china Department of materials science & engineering, Pohang university of science & Technology, Pohang 790-784, Korea material S Univ Sci & Technol beijing Met Sch Beijing 100083 Peoples R China Pohang Univ Sci & Technol Dept Mat Sci & Engn Pohang 790784 South Korea Univ Sci & Technol beijing Sch Mat Sci & Engn Beijing 100083 Peoples R China

The thermodynamic behavior of manganese and phosphorus between liquid iron and CaO-MgO-SiO2-Al2O3.FetO-MnO-P2O5 ladle slag system was addressed by investigating the thermodynamic equilibria between liquid iron containing Mn and P and the ladle slag at 1873.K. The Mn distribution ratio L-Mn increases with increasing FetO content and decreasing the basicity ((%CaO + %MgO)/(%SiO2 + %Al2O3.+ %P2O5)) in slag, while the P distribution ratio Lp seems to be increased as FetO content and the basicity increases. The values of L-Mn and L-p decrease by the addition of Al2O3.into slag. The expression of the dependence of L-Mn and L-p on the basicity and FetO content in slag was obtained.

关键词： manganese phosphorus liquid iron ladle slag thermodynamic behavior

Preconditioned pseudo-compressibility methods for incompressible Navier-Stokes equations

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中国科学：物理学、力学、天文学英文版 2010年第11期53卷 2090-2102页

作者： QIAN ZhanSen ,ZHANG JingBai & LI ChunXuan school of aeronautics science and {3.,Beihang university,beijing 100191,china 1. school of aeronautics science and {3. Beihang University Beijing 100191 China

This paper investigates the pseudo-compressibility method for the incompressible Navier-Stokes equations and the preconditioning technique for accelerating the time marching for stiff hyperbolic equations,and derives and presents the eigenvalues and eigenvectors of the Jacobian matrix of the preconditioned pseudo-compressible Navier-Stokes equations in generally cur-vilinear *** on the finite difference discretization the cored for efficiently solving incompressible flows numerically is *** reliability of the procedures is demonstrated by the application to the inviscid flow past a circular cylinder,the laminar flow over a flat plate,and steady low Reynolds number viscous incompressible flows past a circular *** is found that the solutions to the present algorithm are in good agreement with the exact solutions or experimental *** effects of the pseudo-compressibility factor and the parameter brought by preconditioning in convergence characteristics of the solution are investigated *** results show that the upwind Roe’s scheme is superior to the second order central scheme,that the convergence rate of the pseudo-compressibility method can be effectively improved by preconditioning and that the self-adaptive pseudo-compressibility factor can modify the numerical convergence rate significantly compared to the constant form,without doing artificial tuning depending on the specific flow *** validation is also performed by numerical simulations of unsteady low Reynolds number viscous incompressible flows past a circular *** results are also found in good agreement with the existing numerical results or experimental data.

关键词： pseudo-compressibility method preconditioning upwind scheme incompressible flow Navier-Stokes equations

CODEPOSITION OF ALUMINUM AND SILICON ON PURE MOLYBDENUM SUBSTRATE USING HALIDE ACTIVATED PACK CEMENTATION TREATMENTS

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Acta Metallurgica Sinica(English Letters) 2002年第2期15卷 167-171页

作者： J.L. Xu, F.S. Liu, C.G. Zhou, S.K. Gong and H.B. Xu Department of material science and engineering,{3., beijing 100083, china Department of material science and engineering Beijing University of Aeronautics and Astronautics Beijing 100083 China

A multi-component diffusion coating has been developed to protect Mo-based alloys from high temperature environmental attack. Aluminum addition was made during the coating process to improve the oxidation resistance by developing hexagonal Mo(Si, Al)2 through the development of the halide activated pack cementation coating process on pure Mo substrate. The results show that Mo(Si, Al)2 formed as a main phase on the surface and a little amount of Mo5Si3.also formed. The total thickness of coating is tens ofμm at 13.3.. During the cyclic oxidation test at high temperature(at about 13.3. in air), mullite (3.l2O3.2SiO2) and some SiO2 formed. The addition of Al is beneficial for MoSi2 coating and the Al-doped coating exhibited only a small weight gain and protected the Mo substrate, while the MoSi2 coating without Al suffered a significant weight loss, indicating a loss of volatile MoO3.after cycles.

关键词： multi-component coating Mo(Si A1)2 halide activated pack cementation 3.l2 O3. 2SiO2 oxidation resistance

Object-oriented World-view for Discrete-Event Simulation Modelling

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Systems science and Systems engineering 1996年第4期6卷 411-416页

作者： LIN Jian(The Management school beijing university of {3. & astronautics beijing 100083 china)

Object-oriented world-view provides a natural and powerful paradignl for expressing system elements and their dynamic behaviour for discrete-event simulation. Simulation gives the critical ability to study the dynamic behaviour of the models that are defined with object-voriented means. This paper first examines the ways of applying the object-oriented world-view to three major discrete simulation modelling approaches, then considers the process and merits of object-oriented simulation modelling.

关键词： Object orientation discrete-event simulation object-oriented modelling

A Discrete Event Simulation Support System in C^(++)

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Systems science and Systems engineering 1996年第4期6卷 456-464页

作者： LIN Jian(The Management school beijing university of aeronautics and astronautics beijing 100083,{3.)

This paper describes a discrete simulation support system that forms major parts of most simulation program. The support system contains three main features which differ from the most of other simulation support systems. It follows a strict three phase structure; supports visual interactive simulation. The principles of designing and implementing of the system are explained module by module.

关键词： discrete event simulation simulation support system C￣(++) three phase approach