摘要 :
The reaction microscope (COLTRIMS as well) is a novel technique for the investigation of the dynamics ofion-atoms collisions. Exploiting this technique, a large variety of kinematically complete experiments on electrontransfer and...
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The reaction microscope (COLTRIMS as well) is a novel technique for the investigation of the dynamics ofion-atoms collisions. Exploiting this technique, a large variety of kinematically complete experiments on electrontransfer and ionization have been performed. However, the understanding of these experimental results is farfrom satisfactory, especially for collision energy in the intermediate-energy range. The classical-trajectory MonteCarlo method (CTMC) proposed by Abrines and Percival[1] shed some light on the problem. This method has ademonstrated region of applicability in the intermediate-energy range.
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摘要 :
A method for optimizing tried wave functions in quantum Monte Carlo method has beenfound and used to calculate the energies of molecules, such as H2, Li2, H3+, H3 and H4. Goodresults were obtained.
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Micellar behaviors in 2D and 3D lattice models for amphiphilic comb-like copolymers in water phase and in water/oil mixtures were simulated. A dynamical algorithm together with chain reptation movements was used in the simulation....
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Micellar behaviors in 2D and 3D lattice models for amphiphilic comb-like copolymers in water phase and in water/oil mixtures were simulated. A dynamical algorithm together with chain reptation movements was used in the simulation. Three-dimension displaying program was programmed and free energy was estimated by Monte Carlo technique. The results demonstrate that reduced interaction energy influences morphological structures of micelle and emulsion systems greatly; 3D simulation showing can display more direct images of morphological structures; the amphiphilic comb-like polymers with a hydrophobic main chain and hydrophilic side chains have lower energy in water than in oil.
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The dynamic evolution of the lamellar eutectic of binary alloys in directional solidification is studied in detail using the Monte Carlo technique. The simulated results can be summarized into two aspects: (1) the lamellar spacing...
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The dynamic evolution of the lamellar eutectic of binary alloys in directional solidification is studied in detail using the Monte Carlo technique. The simulated results can be summarized into two aspects: (1) the lamellar spacing λ is found to be inversely proportional to the chemical potential difference △μ, predicting a linear relationship between the kinetic supercooling △Tk and total supercooling at the solid/liquid (S/L) interface; (2) as the solidifying velocity R is low, the dynamic product λ2R shows a considerable dependence on temperature gradient GT in the liquid in front of the S/L interface, although this dependence becomes much weaker at a high R.
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The interaction between light and materials is key to physically-based realistic rendering.However,it is also complex to analyze,especially when the materials contain a large number of details and thus exhibit"glinty"visual effect...
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The interaction between light and materials is key to physically-based realistic rendering.However,it is also complex to analyze,especially when the materials contain a large number of details and thus exhibit"glinty"visual effects.Recent methods of producing glinty appearance are expected to be important in next-generation computer graphics.We provide here a comprehensive survey on recent glinty appearance rendering.We start with a definition of glinty appearance based on microfacet theory,and then summarize research works in terms of representation and practical rendering.We have implemented typical methods using our unified platform and compare them in terms of visual effects,rendering speed,and memory consumption.Finally,we briefly discuss limitations and future research directions.We hope our analysis,implementations,and comparisons will provide insight for readers hoping to choose suitable methods for applications,or carry out research.
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摘要 :
By using the Monte Carlo method and numerical finite elementapproach, bistatic scattering from the fractal and Gaussian rough surfaces is studied. The difference between these two surfaces and their functional dependence on the su...
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By using the Monte Carlo method and numerical finite elementapproach, bistatic scattering from the fractal and Gaussian rough surfaces is studied. The difference between these two surfaces and their functional dependence on the surface parameters are discussed. Angular variation of bistatic scattering from the fractal surface is very significant, even for fairly smooth surface, whilst scattering from the Gaussian rough surface tends to the specular reflection. The slope of angular variation is linearly related with the fractal dimension. If an electrically_large target is placed over the rough surface, the fractal dimension inverted from bistatic scattering would be reduced. As the surfaces become very rough, scattering from different fractal and Gaussian surfaces would be not identified.
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