The fractal surface and fractal adsorption model of sediment 泥沙的分形表面和分形吸附模型
Characteristics of amplitude distribution of em returns from two - dimension fractal surfaces 二維分形粗糙面電磁散射回波的幅值分布特征
The theory and the method are validated by the simulational experiments , in which the scattering from random self - affme fractal surface are simulated and the speckle intensity correlation function are calculated 我們通過模擬實驗,并以自仿射分形隨機表面附近散斑光強的相關函數(shù)進行數(shù)值計算為例,對該理論和方法進行了驗證。
The main contents are as follows : it discusses and simulates several problems of digital map technique in aviation : including random terrain , mountain simulation , fractal surface generation , by those we can get statistic data of the terrain . we can get the data not on the grid by fractal interpolation surface 具體內(nèi)容包括以下幾個方面:針對數(shù)字地圖技術,本文討論并研究了隨機地形算法、山峰模擬算法、分形曲面生成算法,通過這些算法可以得到具有不同統(tǒng)計特性的地形數(shù)據(jù);使用基于分形插值曲面算法可以得到不在網(wǎng)格點上的地形數(shù)據(jù)。
Chaper 4 , we put forward the concept of the near - field speckles and study their properties by the numerical solution of the integral equation based on the green ' s theorem . we study the near - field speckles produced the by random self - affine fractal surfaces of dielectric medium . the speckle intensities evolve considerably in the near - field region and the local fluctuations in them disappear in the distance of a wavelength 在第四章中,我們提出了近場散斑的概念,并依據(jù)介質(zhì)界面電磁波的格林積分摘要方程對自仿射分形隨機表面產(chǎn)生的散斑光場進行了數(shù)值計算模擬研究,發(fā)現(xiàn)近場散斑分形特征與自仿射分形隨機表面的特性有關,且這種分形特征在非近場區(qū)域消失。