双摆

matlab模拟几何光线追迹，计算双胶合透镜的像差(simulate the geometric ray tracing and calculate the aberration of double with matlab)

说明：  6901-计算空气动力学-傅德薰 1994，优质的计算空气动力学算法教材，适合初学者学习(6901 - computational aerodynamics - Fu Dexun 1994, high quality computational aerodynamics algorithm textbook, suitable for beginners to learn)

计算不同高度下大气湍流对空间光到单模光纤的耦合效率。(The coupling efficiency of space to single-mode fiber in the atmospheric turbulence is calculated at different heights.)

说明：  一个基于有限元方法的平面问题求解器，支持网格类型为二维四边形四节点单元和四边形八节点单元的有限元网格： 前处理——用Abaqus建模编号并导出数据 在Matlab中读取数据文件 计算单元刚度矩阵（采用高斯积分），组集结构刚度矩阵 组集结点载荷向量，引入位移边条 求解结点位移，单元应力应变 后处理——绘制应力应变位移云图，与Abaqus结果对照(A plane problem solver based on finite element method)

说明：  基于晶体塑性自洽理论 vpsc 模拟多晶体塑性变形的织构演化(Texture evolution of polycrystalline plastic deformation simulated by vpsc based on crystal plasticity self consistent theory)

实现快速分数阶傅里叶变换功能。分数阶傅里叶变换是整数傅里叶变换的普遍形式，可用于光的菲涅尔衍射模拟。(The function of fast fractional Fourier transform is realized. Fractional Fourier transform is a general form of integer Fourier transform, which can be used to simulate Fresnel diffraction of light.)

说明：  主要用于计算最常见的二维材料石墨烯纳米带的能带结构(It is mainly used to calculate the energy band structure of graphene nanoribbons, the most common two-dimensional material.)

Atef《MATLAB模拟的计算电磁学时域有限差分发》书后完整的MATLAB程序集合(Complete set of MATLAB programs of "Computational Electromagnetics Simulated by MATLAB Finite-Difference Time-Domain Distribution" by Atef)

说明：  对Rsoft仿真数据进行调用处理，更清晰绘制所得结果(Call and process the Rsoft simulation data, and draw the results more clearly.)

求解双马赫反射问题的各种解法，黎曼求解器包括WENO格式和MDCD格式，时间方向采用Runge-kutta 方法，方程包括Euler方程和NS方程。(Program to solve Double Mach Reflection. Use WENO solver and MDCD solver to solve Riemann problem. Use Runge-Kutta to iterate in time scale. Equations conclude Euler equation and N-S equation.)