光学演示实验的Monte—Carlo模拟

为了克服光学实验对实验条件要求比较苛刻的缺点，加深对光学内容的理解，根据惠更斯和菲涅耳原理计算出光向空间某方向传播的几率，采用Monte-Carlo方法，对劈尖，牛顿环的干涉，单缝，圆孔和光栅的衍射以及偏振光的检偏过程进行了计算机模拟，每一种实验在主频为500MHz的计算机上用时4s左右，结果与实物实验相一致，计算机模拟光学演示实验方便，快捷，便于调整实验参数，观测不同的实验结果。     

光学演示实验的Monte-Carlo模拟

为了克服光学实验对实验条件要求比较苛刻的缺点 ,加深对光学内容的理解 ,根据惠更斯和菲涅耳原理计算出光向空间某方向传播的几率 ,采用Monte Carlo方法 ,对劈尖、牛顿环的干涉 ,单缝、圆孔和光栅的衍射以及偏振光的检偏过程进行了计算机模拟。每一种实验在主频为5 0 0MHz的计算机上用时 4s左右 ,结果与实物实验相一致。计算机模拟光学演示实验方便、快捷 ,便于调整实验参数 ,观测不同的实验结果     

结构失效面上的复合蒙特卡罗方法

为了提高采用蒙特卡罗方法计算结构可靠度的效率和精度，提出了一种部分解析的失效面上的复合蒙特卡罗方法.通过对结构极限状态方程中某一变量或变量表达式的解析求解，将抽样点投影到结构失效面上.结合重要抽样方法，分别导出了原始空间（X空间）和旋转的正交正态空间（V空间）的算法.将抽样点投影到失效面上，不仅保证了抽样的有效性，而且使算法对高度非线性失效面具有更强的适应性.解析解的引入，降低了抽样维数，减小了计算结果的随机性，提高了计算精度.理论推导和数值计算证明了该方法的有效性.     

基于Monte-Carlo法的边坡可靠性分析

为了研究土性参数中粘聚力系数c和内摩擦角φ对边坡可靠度指标β的影响,在传统的极限平衡原理Bishop法的基础上,结合可靠度分析方法中的MonteCarlo法,通过MATLAB来实现以上的分析过程。结果表明：粘聚力系数c的变异系数δc以及内摩擦角φ的变异系数δφ与可靠度指标β呈负相关。     

蒙特卡罗方法在水污染控制理论中的应用前景

在介绍蒙特卡罗计算机模拟方法的基本原理的基础上,概述了蒙特卡罗方法在流体力学、石油开采、载体吸附等领域埋的应用现状及存在的问题,对其在水污染控制理论研究中的应用现状和前景进行了详细论述,为水污染控制理论的深入研究开辟了一条崭新的途径。     

Kinetic Monte Carlo simulation of GaN epitaxy

A chemical reaction mode about GaN epitaxy in MOCVD is presented. We simulate the growth process of GaN in the vertical-spray MOCVD system on this mode using the KMC mothod. The result shows that adductive reaction mostly occurs at a lower temperature and pyrolytic reaction mostly occurs at a high temperature. And the growth rate increases with increasing temperature. This feature determines the surface morphology of the material. We also include the diffusion and desorption process of the reaction particle by the KMC method. These processes depend mostly on temperature and ultimately affect the surface morphology of the GaN material.     

Kinetic theory for aquatic animal distribution simulation

Identifying the underlying mechanisms that influence the spatial patterns in populations improves the forecasts of the alternative management strategies on the spatial dynamics of the populations, which are critical for assessing and managing the fisheries and improving the water resource management. This paper described a new approach of the numerical model for the prediction of the aquatic animal distribution in the flows. The model was developed based on the kinetic theory of gases, the mechanism of the aquatic animal movement and the flow hydrodynamic patterns. The model was validated using the available experimental data and an acceptable agreement was obtained. A comprehensive parameter study was then conducted to help understand the impact and the sensitivity of each parameter to the aquatic animal distribution. The promising results of the model reveal the prospect of applying this model to the reliable prediction of the aquatic animal distribution within a relatively large water area.     

电子在混合气体中输运的Monte Carlo研究

针对直流混合气体放电中碰撞分子种类的确定问题,研究了电子在混合气体中的平均碰撞频率、平均自由程与气体密度、配比的关系,给出了抽样确定碰撞分子种类的方法,为数值模拟放电动力学过程提供了理论基础。     

Monte Carlo simulation for simultaneous particle coagulation and deposition

The phenomena of simultaneous particle coagulation and deposition are of great ubiq- uity and of key importance in nature and various engineering applications, including the precipitation and downfall of rain, ice, snowflakes, fog and hail, the scavenging of fly ashin electrostatic precipitator of power plant, the transplantation of fume in smoke flue of pulverized coal-fired plant, nuclear reactor analysis modeling aerosol’s diffusion and deposition when blasting, the suspension and sedimenta…     

运用仿真进行OFDM性能的研究

给出了OFDM（正交频率分割复用）的调制原理及其用傅立叶变换实现的具体方法，介绍了格形编码TCM在OFDM系统中所起的作用，并用Matlab进行了OFDM系统仿真。