exam4

OOFEM是一个开源多物理并行有限元程序的面向对象的架构。这个项目的目的是提供高效率和强大的有限元计算工具，以及提供高度模块化和可扩展性的发展环境。(OOFEM is an object oriented architecture of an open source multi - Physical parallel finite element program. The purpose of this project is to provide efficient and powerful finite element computing tools and to provide a highly modular and extensible environment for development.)

说明：  用来指数曲线拟合，包括曲线平滑 扣基底 参数拟合 绘制曲线(Used for exponential curve fitting, including curve smoothing)

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.)

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)

平面波或锥形波照射任意粗糙面，用基尔霍夫近似方法的散射计算(Kirchhoff scattering rough surface)

fluent udf 两相流 水中气泡生成(Bubble generation in fluent UDF two-phase flow)

说明：  超短脉冲在光纤中传输产生各种非线性效应，影响因素包括激光器的高斯脉冲，本模拟是初始啁啾脉冲的脉冲形状。(The transmission of ultrashort pulses in optical fibers produces various non-linear effects. The influencing factors include the Gaussian pulse of the laser. This simulation is the pulse shape of the initial chirped pulse.)

功能为求解系数矩阵为三对角矩阵或者循环三对角矩阵的线性方程。 输入的四个参数均为行向量，分别对应系数矩阵的上副对角线，主对角线，下副对角线，以及方程等号另一侧的常数矩阵(The four parameters of the input are line vectors, which correspond to the upper diagonal lines of the coefficient matrix, the main diagonal line, the lower diagonal line, and the constant matrix on the other side of the equation.)

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.)

说明：  超短脉冲是谐振腔中增益与损耗达到平衡、色散与非线性达到平衡时所产生的。本模拟是采用分步傅里叶的解，数值求解薛定谔方程。求光孤子在光线内传输。(Ultra-short pulses are generated when the gain and loss of the cavity are balanced, and the dispersion and nonlinearity are balanced. This simulation uses a stepwise Fourier solution to numerically solve the Schrodinger equation. Find the optical soliton to propagate in the light.)