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(guò)模擬實(shí)驗(yàn),并以自仿射分形隨機(jī)表面附近散斑光強(qiáng)的相關(guān)函數(shù)進(jìn)行數(shù)值計(jì)算為例,對(duì)該理論和方法進(jìn)行了驗(yàn)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(gè)方面:針對(duì)數(shù)字地圖技術(shù),本文討論并研究了隨機(jī)地形算法、山峰模擬算法、分形曲面生成算法,通過(guò)這些算法可以得到具有不同統(tǒng)計(jì)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(diǎn)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(chǎng)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(duì)自仿射分形隨機(jī)表面產(chǎn)生的散斑光場(chǎng)進(jìn)行了數(shù)值計(jì)算模擬研究,發(fā)現(xiàn)近場(chǎng)散斑分形特征與自仿射分形隨機(jī)表面的特性有關(guān),且這種分形特征在非近場(chǎng)區(qū)域消失。