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| 1 | GURTIN VARIATIONAL PRINCIPLE AND FINITE ELEMENT SIMULATION FOR DYNAMICAL PROBLEMS OF FLUID-SATURATED POROUS MEDIA显示文摘Based on the theory of porous media,a general Gurtin variational principle for theinitial boundary value problem of dynamical response of fluid-saturated elastic porous media isdeveloped by assuming infinitesimal deformation and incompressible constituents of the solid andfluid phase.The finite element formulation based on this variational principle is also derived.Asthe functional of the variational principle is a spatial integral of the convolution formulation,thegeneral finite element discretization in space results in symmetrical differential-integral equationsin the time domain.In some situations,the differential-integral equations can be reduced to sym-metrical differential equations and,as a numerical example,it is employed to analyze the reflectionof one-dimensional longitudinal wave in a fluid-saturated porous solid.The numerical results canprovide further understanding of the wave propagation in porous media. | Yang Xiao Cheng Changjun Department o,f Mechanics, Shanghai Institute of Applied Mathematics and Mechanics,Shanghai University,Shanghai 200436,China) | 2003 | Acta Mechanica Solida Sinica2003，16，1： | 10 |
| 2 | A New Integrated Design Method Based on Fuzzy Matter-Element Optimization显示文摘This paper puts forward a new integrated design met ho d based on fuzzy matter-element optimization.On the based of analyzing the mod el of multi-objective fuzzy matter-element , the paper defines the m atter-element weightily and changes solving multi-objective fuzzy optimization into solving dependent function K(x) of the single-objective optimization according to the optimization criterion. The paper particularly describes the realization approach of GA process of multi -objective fuzzy matter-element optimization: encode, produce initial populati on, confirm fitness function, select operator, etc. In the process, the adaptive macro genetic algorithms (AMGA) is applied to enhancing the evolution speed. Th e paper improves the two genetic operators: crossover and mutation operator. The modified adaptive macro genetic algorithms (MAMGA) is put forward simultane ously. It is adopted to solve the optimization problem. Three optimization methods, namely fuzzy matter-element optimization method, li nearity weighted method and fuzzy optimization method, are compared by using the table and figure, it shows that not only MAMGA is a little better than the AMGA , but also it reaches the extent to which the effective iteration generation is 62.2% of simple genetic algorithms (SGA). By the calculation of optimum exam ple, the improved method of genetic in the paper is much better than the method in reference of paper. | ZHAO Yan-wei 1, ZHANG Guo-xian 2 (1. College of Mechanical Engineering, Zhejiang University o f Technology, Hangzhou 310014, China 2. College of Mechanical & Electronic al Engineering, Shanghai University, Shanghai 200072, China) | 2002 | 厦门大学学报(自然科学版)2002，41，S1： | 5 |
| 3 | 38N Super Duples Stainless Steel显示文摘 | Nilsson J O Kangas P Karlsson T Mechanical Properties Mi- crostructural Stability and Kinetics of (Alpha)-phase Formation in 29Cr-6Ni-2Mo43 | 2000 | Metallurgical and Materials Transaction2000，31，1： | 1 |
| 4 | The Sn-Fe System显示文摘 | MAO O DAHN J R Mechanically alloyed Sn-Fe(-C) powders as anode materials for Li-ion batteries:II | 1999 | J Electrochem Soc1999，146，： | 1 |
| 5 | A neurotoxic dose of MDMA to rats results in a long-term defect in thermoregulation显示文摘 | Mechan AO O'shea E | 2001 | Psychopharmacology2001，155，4： | 1 |
| 6 | A re view of the multisystemic consequences of obstruc tire jaundice and their impact on perioprative mot bidity and mobility显示文摘 | O'Connor M J Mechanical biliary obstruction | 1985 | Am Surg1985，51，24： | 1 |
| 7 | The adaptive casteship ng f Technology (IJCAT), 2008, multi-agent systems 显示文摘 | Mao X J Shang L J Zhu mechanism for developi International Journal o H | 2008 | Computer Applications in2008，31，12： | 1 |
| 8 | and their correlation with texture profile analysis (TPA) pa- rameters 显示文摘 | Yilmaz M T Karaman S Dogan M Characterization of O/W model system meat emulsions using shear creep and creep recovery tests based on mechanical simulation models | 2012 | Journal of Food Engineering2012，108，2： | 1 |
| 9 | Neuroprotective epigallocatechin-3-gallate areflective outcome of its antioxidant, iron chelating and neuritogenic properties 显示文摘 | Weinreb O Amit T Mandel molecular mechanisms of ( ) S et aT | 2009 | Genes Nut2009，4，： | 1 |
| 10 | The and ink effect remova repulping operation显示文摘 | Bennington C P J 8ui 0 8 mechanical action on waste paper Smith J defibering O | 1998 | Pulp Paper 9ci1998，24，11： | 1 |
| 11 | A comparison between dark agouti and sprague-dawley rats in their behaviour on the elevated plus-maze, open-field apparatus and activity meters, and their response to diazepam 显示文摘 | Annis O Mechan Paula M Moran J Martin Elliott | 2002 | Psychopharmacology2002，159，： | 1 |
| 12 | Almandine megacrysts from Yingfengling Cenozoic basalt in Leizhou Peninsula and their parental magma origin显示文摘The garnet megacrysts from Yingfengling basalts are characterlzed by high FeO (>20%), CaO (7.02% -8.16%) and low MgO (5.88%-10.87%). Significant composition variations are observed in these megacrysts, of which Ni, V, Sc, Co, and HREE are positively correlated with their Mg# and Zr, Hf, Ga, Y, Sr, Nb, Zn and LREE-MREE are negatively correlated with Mg#. Megacryst parent magma is a highly evolved residual melt with strongl depletion in Ti, Sr, Hf, Nb and HREE. This parental magma was generated by more than 60% of crystallization fractionation of clinopyroxene, garnet, plagioclase and ilmenite from quartz tholeiitic magma. It has not erupted to the surface, but stayed at the upper mantle and formed the megacrystic cumulate. Megacrysts and their host basalt are in disequilibrium. | YU Jinhai & S. Y. O’Reilly1. National Key Laboratory of Metallogenic Mechanism of Endogenetic Deposits, Department of Earth Sciences, Nanjing University, Nanjing 210093, China 2. National Key Center of GEMOC, Department of Earth and Planetary Sciences, Macquarie University, North Ryde, NSW 2109, Australia | 2001 | Chinese Science Bulletin2001，46，14： | 1 |
| 13 | Growth hormone axis treatments for HIV-associated lipodystrephy: a systematic review of placebo-controlled trials显示文摘 | Sivakumar T Mechanic O Fehmie DA | 2011 | HIV Med2011，12，8： | 1 |
| 14 | Formulation of elastic multi-structures显示文摘Based on the creative and groundbreaking work done by Feng and Shi, some further work has been carried out comprehensively by the first author on the formulation of elastic multi-structures. The main contribution of this paper can be summarized as follows: The work of Feng and Shi has been extended to an elastic multi-structures with nonlinear structural element: shell in both linear and nonlinear case. Three general combinations of multi-structures have been formulated, that is, Case 1: linear elements of 3-D body, 1-D bar/beam, 2-D plates and 2-D shell; Case 2: nonlinear elements of 3-D body, 1-D bar/beam, 2-D plates and 2-D shell; and Case 3: the linear-nonlinear mix problem of 3-D body (nonlinear), 1-D bar/beam (linear), 2-D plates (linear) and 2-D shell (linear). From the investigation, it has proved that the higher dimensional element will have a strong influence on the lower one with the inner linkage boundaries, and also proved that solution uniqueness of elastic multi-structures is different from a single 3-D body. | SUN BoHua1 & YE ZhiMing2 1 Department of Mechanical Engineering, Cape Peninsula University of Technology, P O Box 1906, Bellville 7535, Cape Town, South Africa 2 Shanghai University, Shanghai 200436, China | 2009 | Science China(Physics,Mechanics & Astronomy)2009，52，6： | 0 |
| 15 | Heat Transfer Characteristics of Wavy-Wall Channels in Micropolar Fluids显示文摘Forced convection flow through a sinusoidally curved converging diverging channel in micropolar fluids has been investigated numerically. A simple coordinate transformation is employed to transform the complex wavy wall channel to a parallel plate channel, and the cubic spline alternating direction implicit method is then used to solve the flow patterns and heat transfer characteristics. The effects of the wavy geometry, vortex viscosity parameter and Reynolds number on skin friction coefficient and Nusselt number have been examined in detail. Results show that the flow through a sinusoidally curved converging diverging channel forms a strong forward flow and a reticular vortex within each wave for larger Reynolds number and wavy amplitudes. The heat transfer rate of a micropolar fluid is smaller than that of a Newtonian fluid, but the skin friction of a micropolar fluid is larger than that of a Newtonian fluid. Moreover, both Reynolds number and wavy amplitude tend to enhance the total heat transfer rate, irrespective of whether the fluids are Newtonian fluids or micropolar fluids. | Cha’o Kuang Chen , Chi Chang Wang Department of Mechanical Engineering, Cheng Kung University, Tainan 701, China | 2002 | Tsinghua Science and Technology2002，7，2： | 0 |
| 16 | Research on Knowledge-based Connecting Elements Modeling显示文摘Steps of manipulation is required to complete the m od eling of the connection elements such as bolt, pin and the like in commerce CAD system. It leads to low efficiency, difficulty to assure the relative position, impossibility to express rules and knowledge. Based on the inner character analy sis of interpart, detail modification and assembly relation of mechanical connec ting element, the idea, which extends the feature modeling of part to the interp art feature modeling for assembly purpose, is presented, and virtual part based connecting element modeling is proposed. Virtual part is a complement set of lo cal modification of part to be connected. In assembly modeling, base part is mod ified by Boolean operation between base part and virtual part. The modeling and assembly is finished just in one operation, at the same time the rules and knowl edge of the connection elements are encapsulated through virtual part. According to this mechanism, a knowledge-based connecting elements rapid design module i s developed on commerce software package UG with satisfying results. | HUANG Xiang, YAN Chong-jing (College of Mechanical and Electrical Engineering, Nanjing University o f Aeronautics and Astronautics, Nanjing 210016, China) | 2002 | 厦门大学学报(自然科学版)2002，41，S1： | 0 |
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