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第六届国际稀土开发与应用研讨会

作者： Min YANG~* Haijun GUO Le ZHOU Qiong DANG Yansheng LI School of Environmental and Chemical Engineering Dalian Jiaotong University box 285 794 Huanghe Road Dalian China 116028

＜正＞Recently,the interest to reforming of CH4 with CO2（CRM） has rapidly increased due to the both commercial and environmental *** industrial point of view,the advantages of this reaction are:（i） using the most abundant and cheapest carbon-containing gases（CH4 and CO2）;（ii） producing low H2/CO ratio（compared to steam reforming）,which is suitable for depth transformation of Oxo and Fischer-Tropsch synthesis[1];（iii） application in the chemical energy transmission[2].Furthermore,the consumption of CH4 and CO2 greenhouse gases could lead to a decline in the rate of the global warming. The effect of rare-earth promoter CeO2 loading（1-6 wt.%） on the morphologies,properties and catalytic behaviors of nano Pt/MgO catalysts was *** support MgO was prepared by ion exchange resin method,the catalysts were prepared by co-impregnation method and characterized by SEM,TEM,X-ray diffraction（XRD）,and *** dispersion was estimated through cyclohexane dehydrogenation[3].The SEM measurements indicated that the morphologies and particle size of catalysts weren’t altered with the addition of *** showed the formation of nanocrystalhtes of Pt on the surface of MgO,but no Pt diffusion peaks appeared on the fresh catalysts with the addition of ceria due to the well dispersed Platinum particles, indicating that the CeO2 addition promoted the Pt dispersion. CO2-TPD analyses showed that the CeO2 promoter can enhance the metal-support interaction between platinum and magnesia,and thus lower the temperature of the reforming reaction of CH4 with CO2 and improve the resistance to carbon *** dispersion of Pt,measured by the rate of cyclohexane dehydrogenation,increases with increasing of the CeO2 loading,supported the above *** effect of CeO2 on the catalytic behavior of nano Pt/MgO catalysts in the reaction of CO2 reforming of CH4 was *** of CeO2 results in improvement of catalytic performance for the reforming of methane with CO2.

关键词： CeO2 promoter nano Pt/MgO catalysts CH4 reforming dispersion activity

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Al_2O_3-Coated Nano-SiC Particles Reinforced Al_2O_3 Matrix Composites

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Journal of Materials Science & Technology 2002年第6期18卷 541-543页

作者： Juxian ZHANG, Jinjun FENG and Longqiao GAOBeijing Vacuum Electronics Research Institute, PO. box 749 Ext. box 33, Beijing 100016, China Beijing Vacuum Electron. Res. Inst. PO Box 749 Beijing 100016 China

Properties of Al2O3-coated nano-SiC have been compared with those of as-received SiC. The isoelectric point (IEP) of SiC changed from pH3.4 to pH7.3 after coating with the alumina precursor, which is close to that of alumina. Because both surfaces of coated SiC and AI2O3 possess higher positive charge at pH=4.5-5.0, they are uniformly dispersed in the two-phase aqueous suspensions, Then a mixed powder containing nano-SiC dispersed homogeneously into the Al2O3 matrix was achieved from flocculating the two-phase suspension. Finally, Al2O3/SiC nanocomposites were obtained by coating nano-SiC with Al2O3, in which the majority of SiC particles were located within the AI2O3 grains. The observation by transmission electron microscopy (TEM) and the analysis by the X-ray photoelectron spectroscopy (XPS) showed that cracks propagated towards the intragranular SiC rather than along grain boundaries.

关键词： Coated nano-SiC Colloidal processing Nanocomposites Intragranular structure Transgranular fracture

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Regular Splitting and Potential Reduction Method for Solving Quadratic Programming Problem with box Constraints

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Journal of Computational Mathematics 2002年第6期20卷 643-652页

作者： Zi-Luan Wei(Institute of Computational Mathematics and Scientific / Engineering Computing, Academy of Mathematics and System Sciences, Chinese Academy of Sciences, P.O. box 2719, Beijing, 100080) Institute of Computational Mathematics and Scientific / Engineering Computing Academy of Mathematics and System Sciences Chinese Academy of Sciences P.O. Box 2719 北京 100080

Presents a regular splitting and potential reduction method for solving a quadratic programming problem with box constraints. Discussion on the regular splitting and potential reduction algorithm; Complexity analysis ... 详细信息

关键词： quadratic programming problem regular splitting potential reduction algorithm complexity analysis

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A Parallel Algorithm for Corner Detection on Object Contour

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Journal of Systems Engineering and Electronics 1992年第1期3卷 56-63页

作者： Lan YongchuanBeijing Institute of Remote Sensing Equipment,Beijing P.O.box 3925 Beijing Institute of Remote Sensing Equipment Beijing P.O. Box 3925

A new parallel algorithm for corner detection on object contour is presented in the paper. In this algorithm whenever a point (pixel) is scanned, the k direction codes between the two sides of the point, which is on the edge of an object, are obtained by k-step forward and backward boundary tracking. A comer is determined by the sum of the difference between the two weighted code chains. Note that the whole chain code sequence or boundary of an object is not necessary to be extracted at all in this algorithm, and the corners are obtained immediately once the image is scanned, furthermore, what humans perceive as corners can be detected and localized by this algorithm.

关键词： Corner detection Boundary tracking Degree of sharpness

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PARALLEL MULTI-STAGE & MULTI-STEP METHOD IN ODES

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Journal of Computational Mathematics 2000年第2期18卷 157-164页

作者： Xiao-qiu Song (Institute of Computer Application and Simulation Technology P.O.box 3929, Beijing 100854, China) 北京计算机应用与仿真技术所北京 100854

Presents information on a study which discussed the theory of parallel multi-stage and multi-step method, which is a form of combining Runge-Kutta method with linear multi-step method. Basic theory and equations; Appl... 详细信息

关键词： ordinary differential equations parallel simulation

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INTERIOR ERROR ESTIMATES FOR NONCONFORMINGFINITE ELEMENT METHODS OF THE STOKES EQUATIONS

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Journal of Computational Mathematics 1999年第5期17卷 475-494页

作者： Xiao-bo Liu(Department of Mathematics and Computer Science Clarkson University box 5815, Potsdam,NY 13699-5815, USA) Clarkson University 美国

Interior error estimates are derived for nonconforming stable mixed finite element discretizations of the stationary Stokes equations. As an application, interiorconvergences of difference quotients of the finite element solution are obtained forthe derivatives of the exact solution when the mesh satisfies some translation invariant condition. For the linear element, it is proved that the average of thegradients of the finite element solution at the midpoint of two interior adjacenttriangles approximates the gradient of the exact solution quadratically.

关键词： Interior error estimates Nonconforming element Stokes equations.

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Pulsation Solution to the Equation of Earth's Gravitational Field (Main Outcome)

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Acta Geologica Sinica(English Edition) 2000年第2期74卷 297-300页

作者： JIANG Zhi Gold Headquarters, P.O.box 9902, Beijing 100102 Gold Headquarters Beijing 100102 Peoples R China

Using d'Alembert equation as the approximation of Einstein's equation, a solution is given in this paper to the time-dependent gravitational equation of the Earth in consideration of the Earth's features, which describes the characteristics of pulsation of the Earth and the structures of spherical layers of its interior, thus providing a theoretical basis for establishing the idea of mantle pulsation.

关键词： d'Alembert equation formula of gravitational field spherical layers density model mantle pulsation

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The effects of relative density of metal foams on the stresses and deformation of beam under bending

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Acta Mechanica Sinica 2007年第4期23卷 409-414页

作者： Aiyu Zhu Tianyou Fan Department of Mathematics,School of Science,Beijing Institute of Technology,P.O.box 327,Beijing 100081,China Department of Physics,School of Science,Beijing Institute of Technology,P.O.box 327,Beijing 100081,China Department of Mathematics School of Science Beijing Institute of Technology Department of Physics School of Science Beijing Institute of Technology

The exact analytic solution of the pure bending beam of metallic foams is given. The effects of relative density of the material on stresses and deformation are revealed with the Triantafillou and Gibson constitutive law （TG model） taken as the analysis basis. Several examples for individual foams are discussed, showing the importance of compressibility of the cellular materials. One of the objects of this study is to generalize Hill＇s solution for incompressible plasticity to the case of compressible plasticity, and a kinematics parameter is brought into the analysis so that the velocity field can be determined.

关键词： Metal foams - Relative density Compressible plasticity Constitutive law - TG model

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Dielectronic Recombination Rate Coefficients for Nickel-like Ytterbium

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Chinese Journal of Lasers 1996年第3期B5卷 242-247页

作者： ZHAO Libol LI Shichang(Institute of Physics, Academic Sinica, P. O. box 603, Beijing 100080,Institute of Applied Physics and Computational Mathematics, P. O. box 8009, Beijing, China) Inst of Physics Academia Sinica Beijing China

Ｄｉｅｌｅｃｔｒｏｎｉｃ　Ｒｅｃｏｍｂｉｎａｔｉｏｎ　Ｒａｔｅ　Ｃｏｅｆｆｉｃｉｅｎｔｓ　ｆｏｒ　Ｎｉｃｋｅｌ－ｌｉｋｅ　ＹｔｔｅｒｂｉｕｍＤｉｅｌｅｃｔｒｏｎｉｃＲｅｃｏｍｂｉｎａｔｉｏｎＲａｔｅＣｏｅｆｆｉｃｉｅ... 详细信息

Ｄｉｅｌｅｃｔｒｏｎｉｃ　Ｒｅｃｏｍｂｉｎａｔｉｏｎ　Ｒａｔｅ　Ｃｏｅｆｆｉｃｉｅｎｔｓ　ｆｏｒ　Ｎｉｃｋｅｌ－ｌｉｋｅ　ＹｔｔｅｒｂｉｕｍＤｉｅｌｅｃｔｒｏｎｉｃＲｅｃｏｍｂｉｎａｔｉｏｎＲａｔｅＣｏｅｆｆｉｃｉｅｎｔｓｆｏｒＮｉｃｋｅｌ－ｌｉｋｅ...

关键词： dielectronic recombination autoionizing state Auger rate

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A Class of Parallel Implicit Runge-Kutta Formulas

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Journal of Systems Engineering and Electronics 1993年第4期4卷 53-63页

作者： Fei JinggaoBeijing Institute of Computer Application and Simulation Technology P.O. box 3929, Beijing 100854, China Beijing Institute of Computer Application and Simulation Technology P.O. box 3929 Beijing 100854 China

A class of parallel implicit Runge-Kutta formulas is constructed for multiprocessor system. A family of parallel implicit two-stage fourth order Runge-Kutta formulas is given. For these formulas, the convergence is proved and the stability analysis is given. The numerical examples demonstrate that these formulas can solve an extensive class of initial value problems for the ordinary differential equations.

关键词： Multiprocessor system Parallel algorithm Ordinary differential equation Implicit Runge-Kutta formula.

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