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| 1 | DYNAMIC RECOVERY AND DYNAMIC RECRYSTALLIZATION OF 7005 ALUMINIUM ALLOY DURING HOT COMPRESSION显示文摘Dynamic recovery and dynamic recrystallizatin behaviors of AA7005 aluminium alloy (Al - Zn - Mg) during hot compression are investigated by isothermal compression testing.The interdependence of flow stress,stress, strain rate,true strain and deformation temperature for the alloy is analyzed by introduc- ing Zener-Hollomon parameter. A steady - state flow of the 7005 alloy is confirmed to be a thermal- ly activated process.which is governed by rate-controlling mechanisms of dislocations.A hyperbolic sine relationship can satisfactorily correlate temperature, strain rate with flow stress through an Arrhe- nius term that involves thermal activation parameters. The dynamic recovery mechanisms of the alloy are discussed.Cross- slip of jogged screw dislocations is the main dynamic recovery mechanism over the deformation temperatures and strain rates.Subgrains are highly developed in the originally elongat- ed grains.The size of the subgrain increases with decrease of the natural logarithm of Zener- Hol - lomon parameter.Local dynamic recrystallization is operative when the alloy is deformed at temperature of 500℃ and strain rate of 0. 001s - 1. | J. Shen S. S. Xie and J. H. tang (General Research Institute for Non - ferrous Metals,Beijing 100088, China) | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，1： | 33 |
| 2 | Numerical simulation on electromagnetic field,flow field and temperature field in semisolid slurry preparation by A-EMS显示文摘A two-dimensional computational model coupling an annular electromagnetic stirring(A-EMS) with a macroscopic heat and fluid flow analysis in Al-alloys semisolid slurry preparation was developed.The dynamic evolutions of the electromagnetic field,flow field,and temperature field were presented successfully by commercial software ANSYS 10.0 with corresponding experimental verification.A horizontally rotational electromagnetic field and,thereby,a more intensive velocity field were uniformly distributed in the stirred melt even at commercial frequency,and thus,a lower temperature difference in the stirred melt and subsequent uniformly fine microstructures were obtained compared with the normal electromagnetic stirring.The simulation results were in good agreement with experimental ones. | ZHANG Zhifeng,CHEN Xingrun,XU Jun,and SHI Likai National Engineering & Technology Research Center for Nonferrous Metal Matrix Composites,General Research Institute for Nonferrous Metals,Beijing 100088,China | 2010 | Rare Metals2010，29，6： | 13 |
| 3 | Two new types of bounded waves of CH-γ equation显示文摘In this paper, the bifurcation method of dynamical systems and numerical approach of differential equations are employed to study CH-γ equation. Two new types of bounded waves are found. One of them is called the compacton. The other is called the generalized kink wave. Their planar graphs are simulated and their implicit expressions are given. The identity of theoretical derivation and numerical simulation is displayed. | GUO Boling & LIU Zhengrong Institute of Applied Physics and Computational Mathematics, Beijing 100088, China School of Mathematical Sciences and Center for Nonlinear Science Studies, South China University of Technology, Guangzhou 510640, China | 2005 | Science China Mathematics2005，48，12： | 12 |
| 4 | Partial Regularity for Two Dimensional Landau-Lifshitz Equations | Chen Yunmei Ding Shijin Guo Doling Department of Mathematics, University of Florida, Gainesville, FL32611, U.S.A. Institute of Applied Physics and Computational Mathematics, P. O. Box 8009, Beijing, 100088, China | 1998 | Acta Mathematica Sinica,English Series1998，14，3： | 12 |
| 5 | The attractor of the stochastic generalized Ginzburg-Landau equation显示文摘The stochastic generalized Ginzburg-Landau equation with additive noise can be solved pathwise and the unique solution generates a random system.Then we prove the random system possesses a global random attractor in H01. | GUO BoLing~1 WANG GuoLian~(2+) Li DongLong~3 1 Institute of Applied Physics and Computational Mathematics,P.O.Box 8009,Beijing 100088,China 2 The Graduate School of China Academy of Engineering Physics,P.O.Box 2101,Beijing 100088,China 3 Department of Information and Computer Science,Guangxi University of Technology,Liuzhou 545006,China | 2008 | Science China Mathematics2008，51，5： | 11 |
| 6 | Approximate Inertial Manifolds to the Generalized Symmetric Regularized Long Wave Equations with Damping Term显示文摘In the present paper, we construct two approximate inertial manifolds for the generalized symmetric regularized long wave equations with damping term. The orders of approximations of these manifolds to the global attractor are derived. | Bo-ling Guo, Ya-dong ShangInstitute of Applied Physics and Computational Mathematics, P.O. Box 8009, Beijing 100088, China | 2003 | Acta Mathematicae Applicatae Sinica2003，19，2： | 11 |
| 7 | Kinetics of Hydrogen Absorption in Hydrogen Storage Alloy显示文摘Hydrogenation kinetics of MLNi3.8(Co,Mn,Al)1.2 and MLNi3.7(Co,Mn,Al)1.2Cu0.1 alloy in α + β phase at the temperatUre range of 30 ~70 ℃ has been studied. The kinetic mechanism of hydrogen absorption is not affected by initial hydrogen pressure. Temperature does not influence the rate of hydrogen absorption obviously. In the prior and later period of hydrogen absorption the rate-controlling step is chemical reaction and hydrogen diffusion in the hydride phase respectively for MLNi3.8(Co,Mn,Al)1.2 alloy. Adding Cu, the rate-controlling step changes from chemical reaction to the nucleation and growth of β phase in the prior period and the process of hydrogen absorption still controlled by diffusion in the later period. | LIN Qin CHEN Ning YE Wen LIU Renmin(Applied Science School, USTB, Beijing 100083, China) (General Research Institute of Non-Ferrous Metals Beijing, 100088) | 1997 | International Journal of Minerals,Metallurgy and Materials1997，11，2： | 10 |
| 8 | Stability of Difference Schemes with Intrinsic Parallelism for Quasilinear Parabolic Systems显示文摘StabilityofDifferenceSchemeswithIntrinsicParallelismforQuasilinearParabolicSystems￥ZhouYulinandYuanGuangweiLaboratoryofComput... | Zhou Yulin and Yuan GuangweiLaboratory of Computational PhysicsCentre for Nonlinear Studies(Institute of Applied Physics and Computational MathematicsP. O. Box 8009, Boiling, 100088, China) | 1996 | Wuhan University Journal of Natural Sciences1996，1，Z1： | 10 |
| 9 | GENERAL DIFFERENCE SCHEMES WITH INTRINSICPARALLELISM FOR SEMILINEAR PARABOLIC SYSTEMS OFDIVERGENCE TYPE显示文摘1.IntroductionIn[1]and[2]thegeneralfinitedifferenceschemeshavingtheintrinsiccharacterofparallelismfortheboundaryvalueproblemsofthenonlinearparabolicsystemofgeneralform(i.e.,non-divergencetype)arediscussedundertheassumptionthatthereisanuniquesmoothsol... | Yu-lin Zhou Guang-wei Yuan(Laboratory of Computational Physics, Center of Nonlinear Studies, Institute of Applied Physics and Computational Mathematics, P.O. Box 8009, Beijing 100088, China) | 1999 | Journal of Computational Mathematics1999，17，4： | 8 |
| 10 | EXACT SOLUTIONS FOR GENERAL VARIABLE-COEFFICIENT KdV EQUATION显示文摘By asing the nonclassical method of symmetry reductions, the exact solutions for general variable coefficient KdV equation with dissipative loss and nonuniformity terms are obtained. When the dissipative loss and nonuniformity terms don’t exist, the multisoliton solutions are found and the corresponding Painleve II type equation for the variable coefficient KdV equation is given. | Liu Xiqiang Jiang SongGraduate School, China Academy of Engineering and Physics, P.O. Box 2101, Beijing 100088 Dept. of Math., Liaocheng Teachers Univ., Shandong 252000. Institute of Applied Physics and Computational Mathematics, P.O. Box 8009, Beiji | 2001 | Applied Mathematics(A Journal of Chinese Universities)2001，16，4： | 8 |
| 11 | BLOW-UP CRITERION OF SMOOTH SOLUTIONS TO THE MHD EQUATIONS IN BESOV SPACES显示文摘In this paper we discuss the logarithmic Sobolev inequalities in Besov spaces,and show their applications to the blow-up criterion of smooth solutions to the incompressible magneto-hydrodynamics equations. | YUAN Baoquan (Graduate School, Chinese Academy of Engineering Physics P.O. Box 2101, Beijing 100088 Department of Applied Mathematics and Informatics, Henan Polytechnic University, Jiaozuo 454000, China. | 2005 | Journal of Systems Science & Complexity2005，18，2： | 8 |
| 12 | Temperature pattern dynamics in shocked porous materials显示文摘The physical fields in porous materials under strong shock wave reaction are very complicated. We simulate such systems using the grain contact material point method. The complex temperature fields in the material are treated with the morphological characterization. To compare the structures and evolution of characteristic regimes under various temperature thresholds, we introduce two concepts, structure similarity and process similarity. It is found that the temperature pattern dynamics may show high similarity under various conditions. Within the same material, the structures and evolution of high-temperature regimes may show high similarity if the shock strength and temperature threshold are chosen appropriately. For process similarity in materials with high porosity, the required temperature threshold increases parabolically with the impact velocity. When the porosity becomes lower, the increasing rate becomes higher. For process similarity in different materials, the required temperature threshold and the porosity follow a power-law relationship in some range. | XU AiGuo*, ZHANG GuangCai, LI Hua, YING YangJun, YU XiJun & ZHU JianShi National Key Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, Beijing 100088, China | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，8： | 7 |
| 13 | Corrosion behavior of Mg-Y alloy in NaCl aqueous solution | Xin Zhang a,b,c,Kui Zhang a,Xia Deng a,Hongwei Li b,c,Yongjun Li a,Minglong Ma a,Ning Li b,c,Yanlong Wang b,c a State Key Laboratory for Fabrication and Processing of Nonferrous Metals,Beijing General Research Institute for Nonferrous Metals,Beijing 100088,China b Beijing Engineering Research Center for Advanced Manufacturing and Evaluation of Special Vehicle Parts,Beijing 100072,China c Center of Technology,Beijing North Vehicle Group Corporation,Beijing 100072,China | 2012 | Progress in Natural Science:Materials International2012，22，2： | 7 |
| 14 | EXACT SOLUTIONS OF SOME FIFTH-ORDER NONLINEAR EQUATIONS显示文摘To solve the nonlinear partial differential equations is changed into solving some algebraic equations by using the function U to be expressed as linear independent functions. The new soliton and periodic solutions of some fifth\|order nonlinear partial differential equations are obtained. | Liu Xiqiang\ Bai ChenglinInstitute of Appl.Phys. and Com putational Mathem atics,PO Box 2101,Beijing 100088 Dept.of Math.,Liaocheng Teachers Univ.,Liaocheng 252059.Dept. of Com m unication Engineering,Liaocheng Teachers Univ.,Liao cheng 252059. | 2000 | Applied Mathematics(A Journal of Chinese Universities)2000，15，1： | 7 |
| 15 | Dynamic fracture toughness of TA15ELI alloy studied by instrumented impact test显示文摘The dynamic fracture toughness of TA15ELI alloy with two types of microstructures was studied by instrumented impact test.Charpy specimens with both the 0.2 mm U-notch and the a/W = 0.2 pre-crack were adopted to compare notch sensitivity in the two microstructures.The result shows that the specimen with Widmanst?tten microstructure exhibits a better dynamic fracture toughness and lower notch sensitivity than that with lath-like microstructure.Fracture surfaces in the case of the two microstructures are analyzed to have a ductile and brittle mixed feature under dynamic loading.The fracture surface of lath-like microstructure is composed of dimples and tear ridges,while that of Widmanst?tten microstructure is covered with rough block-like facets and dimples and tear ridges.The α phase boundaries and α/β interfaces act as locations for void nucleation and crack arrest and deviation.The decrease in width of α phase lamellae leads to the increase in the amount of boundaries and interfaces,which causes the increase in the consumption of impact energy and results in the improvement in dynamic fracture toughness. | LIU Rui,HUI Songxiao,YE Wenjun,XIONG Baiqing,YU Yang,and FU Yanyan State Key Laboratory for Fabrication & Processing of Nonferrous Metals,General Research Institute for Nonferrous Metals,Beijing 100088,China | 2010 | Rare Metals2010，29，6： | 6 |
| 16 | The unconditional stable and convergent difference methods with intrinsic parallelism for quasilinear parabolic systems显示文摘A kind of the general finite difference schemes with intrinsicparallelism for the boundary value problem of the quasilinearparabolic system is studied without assuming heuristically thatthe original boundary value problem%for the quasilinear parabolic systemhas the unique smooth vector solution. By the method of a prioriestimation of the discrete solutions of the nonlinear differencesystems, and the interpolation formulas of the various norms ofthe discrete functions and the fixed-pointtechnique in finite dimensional Euclidean space, the existence anduniqueness of the discrete vector solutions of the nonlineardifference system with intrinsic parallelismare proved. Moreover the unconditional stability ofthe general finite difference schemes with intrinsic parallelismis justified in the sense of the continuous dependence of thediscrete vector solution of the difference schemes on the discretedata of the original problems in the discrete W(2,1)2 norms. Finally the convergence of the discrete vector solutions ofthe certain difference schemes with intrinsic parallelism to the unique generalized solution of the original quasilinear parabolic problem is proved. | ZHOU Yulin YUAN Guangwei SHEN Longjun Laboratory of Computational Physics, Center of Nonlinear Studies, Institute of Applied Physics and Computational Mathematics, Beijing 100088, China | 2004 | Science China Mathematics2004，47，3： | 6 |
| 17 | 过量受照人员细胞遗传学随访观察显示文摘本文报道了一次受γ射线过量(10.0~46.8cGy)照射人员照后15~26年细胞遗传学随访结果。其中,染色体畸变分析56例,微核检查直接法22例,常规培养法42例,并设有相应的对照组。结果表明,染色体畸变率和两种方法的微核率受照组都明显高于对照组,差异有显著性意义,但染色体畸变率及微核率与受照剂量的相关关系已不存在。 | Bai Yushu (Laboratory of Industrial Hygiene,Ministry of Health,Beijing 100088) | 1997 | 中国辐射卫生1997，6，2： | 5 |
| 18 | Improvement on the Neural Algorithm for Communication Network Partitioning Design显示文摘ImprovementontheNeuralAlgorithmforCommunicationNetworkPartitioningDesignChenXiaoandRuanChuangai(DepartmentofInformationEngine... | Chen Xiao and Ruan Chuangai (Department of Information Engineering,Beijing University of Posts and Telecommunications ,Beijing 100088,P.R China) | 1997 | The Journal of China Universities of Posts and Telecommunications1997，4，1： | 5 |
| 19 | Travelling wave solutions of a generalized Camassa-Holm-Degasperis-Procesi equation显示文摘The travelling wave solutions of a generalized Camassa-Holm-Degasperis-Procesi equation ut-uxxt + (1 + b)umux = buxuxx + uuxxx are considered where b > 1 and m are positive integers. The qualitative analysis methods of planar autonomous systems yield its phase portraits. Its soliton wave solutions, kink or antikink wave solutions, peakon wave solutions, compacton wave solutions, periodic wave solutions and periodic cusp wave solutions are obtained. Some numerical simulations of these solutions are also given. | DENG ShengFu1, GUO BoLing2 & WANG TingChun2,3 1Department of Mathematics, Zhanjiang Normal University, Zhanjiang 524048, China 2Institute of Applied Physics and Computational Mathematics, Beijing 100088, China 3 College of Math and Physics, Nanjing University of Information Science and Technology, Nanjing 210044, China | 2011 | Science China Mathematics2011，54，3： | 5 |
| 20 | THE UNCONDITIONAL STABLE DIFFERENCE METHODS WITH INTRINSIC PARALLELISM FOR TWO DIMENSIONAL SEMILINEAR PARABOLIC SYSTEMS显示文摘In this paper we are going to discuss the difference schemes with intrinsic parallelism for the boundary value problem of the two dimesional semilinear parabolic systems.The unconditional stability of the general finite difference schemes with intrinsic parallelism is justified in the sense of the continuous dependence of the discrete vector solution of the difference schemes on the discrete data of the original problems in the discrete W2^(2,1) norms.Then the uniqueness of the discrete vector solution of this difference scheme follows as the consequence of the stability. | Guangwei Yuanf Longjun Shen(National Laboratory of Computational Physics, Institute of Applied Physics and Computational Mathematics, P.O. Box 8009, Beijing, 100088, China) | 2003 | Journal of Computational Mathematics2003，21，1： | 5 |
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