• Title/Summary/Keyword: 브라운운동 시뮬레이션방법

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Connectivity and Conductivity of a Three-Dimensional Checkerboard-Shaped Composite Material (체커보드 형상을 가진 3차원 복합소재의 연결도와 전도율)

  • KIm, In-Chan
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.28 no.2
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    • pp.189-198
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    • 2004
  • We consider the problem of whether the three-dimensional checkerboard has the connectivity. For this purpose, we first consider the problem of determining the effective conductivity of a checkerboard-shaped composite material by the Brownian motion simulation method. Specifically, we use the efficient first-passage-time technique. Simulation results show that the effective conductivity of the three-dimensional checkerboard increases faster than the two-dimensional counterpart as the contrast between the phase conductivities increases. This implies that the three-dimensional checkerboard's connectivity is stronger than the two-dimensional checkerboard's and thus each phase material of the three-dimensional checkerboard is more likely to be connected than not to be connected.

Elevation Restoration of Natural Terrains Using the Fractal Technique (프랙탈 기법을 이용한 자연지형의 고도 복원)

  • Jin, Gang-Gyoo;Kim, Hyun-Jun
    • Journal of Navigation and Port Research
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    • v.35 no.1
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    • pp.51-56
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    • 2011
  • In this paper, we presents an algorithm which restores lost data or increases resolution of a DTM(Digital terrain model) using fractal theory. Terrain information(fractal dimension and standard deviation) around the patch to be restored is extracted and then with this information and original data, the elevations of cells are interpolated using the random midpoint displacement method. The results of the proposed algorithm are compared with those of the bilinear and bicubic methods on a fractal terrain map.