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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Biochemistry 32 (1993), S. 12279-12282 
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Machine vision and applications 7 (1994), S. 277-289 
    ISSN: 1432-1769
    Keywords: Image sensing ; Computer modeling and simulation ; CCD cameras ; Machine vision ; Image defocus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract A computational model and a computer simulation system are presented for image sensing in a typical CCD camera system. The computational model makes explicit the sequence of transformations that the light incident on the camera system undergoes before being sensed and recorded. The model is based on a precise definition of input to the camera system that decouples the photometric properties of a scene from the geometric properties of the scene. Based on this model, an interactive research software, the Image Defocus Simulator, has been developed. Application of this software in machine vision research and development is described with examples.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 334-335 (Mar. 2007), p. 621-624 
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: To better understand the responses of ultrananocrystalline diamond (UNCD) underextreme working conditions, a numerical study is performed to investigate the size, loading rate andthermal effects on the material properties of UNCD films. A combined kinetic Monte Carlo (KMC)and molecular dynamics (MD) method is first applied to simulate the growth of polycrystallineUNCD films. The responses of the resulting UNCD films with various grain sizes are theninvestigated by applying displacement–controlled tensile loading with different rates andtemperatures in the MD simulations. The preliminary results presented in this paper provide a betterunderstanding of the combined size, rate and thermal effects on the material properties of UNCD
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 29-30 (Nov. 2007), p. 367-370 
    ISSN: 1662-8985
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Water contaminated by heavy metals remains a serious environmental and public healthproblem. The toxic effects of heavy metals on the biosphere have been demonstrated by a number ofstudies. Since the main sources of heavy metals for humans are water and food, the monitoring of theheavy metals content in natural water is of paramount importance. Diverse technologies have beenused to reduce the contents of heavy metals in water. Recently, adsorption methods have been widelyused because of their low cost. The novel nano-water-purifying material used in our work iscomposed of AlO(OH) nanoparticles loaded onto glass fibre and supported by active carbon felt. TheAl nano-powder starting material, was prepared using an electric explosive technique. The productswere characterized by X-ray diffraction, scanning electron microscope, transmission electronmicroscope, and BET techniques. It was found that the particles consisted of AlO(OH) nanofibres ofpure boehmite structure. They exhibited a surface area of 431.7 m2 / g. The composite material wasfound to be effective in removing cadmium from dilute aqueous solutions and could find broadapplication in heavy metal removal
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 334-335 (Mar. 2007), p. 725-728 
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 505-507 (Jan. 2006), p. 895-900 
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: This paper presents a methodology for obtaining an optimal parting line of an injectionmould based on FEM analysis and managements. This research utilizes Taguchi’s method to design a DATABASE for the gate position and warping of parts. Firstly, it sets up an injection model via a CAD system, and secondly, utilizes FEM to analyze the warp of the injection mould in different gate positions. Because of different gate positions, the parts experienced extreme differences in the amount of warping. This paper applies the neural network (abductive network) to build the relationship (database) between the gate position and amount of warp. Engineers can use thisdatabase without recourse to a CAD model and FEM solution to predict the amount of warping at different gate positions. This procedure saves time in building CAD models and on carrying out FEM analysis. The optimal parting line parameters can then be reached through a Simulated Annealing (SA) optimization algorithm. The methodology uses multi-objective function criteria, with a performance index to obtain perfect parts. This method of database management can offer various design fields of injection mould (e.g., design of gating and runner, and design of coolingsystem). It already achieves real optimization of design for injection moulding
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Acta mechanica solida Sinica 2 (1989), S. 163-174 
    ISSN: 0894-9166
    Keywords: plasticity ; limit analysis ; collapse load ; pressure vessel ; experimental method
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract A zero-curvature criterion is proposed to determine the practical collapse load. Six tests have been carried out on spherical pressure vessels with cylindrical nozzle. Results of these tests and other experimental data quoted from different references are discussed in order to compare the new criterion with various previously proposed criteria. It is concluded that: (1) the zero-curvature point is a characteristic point of the experimental curve and that the new criterion is an objective criterion without any artificial coefficient. (2) the deviation of the collapse load estimated by the new criterion is smaller than that estimated by other criteria.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Acta mechanica solida Sinica 6 (1993), S. 341-348 
    ISSN: 0894-9166
    Keywords: limit analysis ; mathematical programming ; finite element method
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract This paper deals with the computational methods for limit analysis of plane strain problems. The finite element mathematical programming formula (FE-MPF) for determining the upper bound load multiplier established by the authors earlier is adopted and modified for plane strain problems. The penalty method is used to impose the incompressibility constraint. The FE-MPF is solved by a direct iteration procedure without the need of a searching process. This algorithm is not sensitive to the volumetric locking effect. And it can be easily extended to the limit analysis of three dimensional problems. The results of numerical examples are satisfactory and show the stable convergency of the present algorithm.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Acta mechanica solida Sinica 3 (1990), S. 277-285 
    ISSN: 0894-9166
    Keywords: reinforced concrete ; finite element analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract A new reinforced concrete model, in which the reinforcement steel is assumed as smeared / layered in concrete, is established and installed into a currently used finite element code for nonlinear analysis. It performs the nonlinear behaviors of both concrete and the reinforcement steel. The results of examples are in good agreement with the experimental data.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Acta mechanica solida Sinica 5 (1992), S. 99-110 
    ISSN: 0894-9166
    Keywords: shakedown analysis ; stress function method ; axisymmetric shells ; finite element method ; linear programming
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract A self-equilibrated stress obtained from the stress functions of thin shells is used for the static shakedown theorem as a residual stress. In combination with the finite element method, a linear programming formulation of the shakedown analysis of axisymmetric shells is derived. The physical meaning of the stress function method is clear and its computing amount is small. Some examples of the plates and shells show that the method is reasonable and efficient.
    Type of Medium: Electronic Resource
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