R-R分布

利用matlab对轴系当量模型扭转振动的振型和频率进行计算(Calculation of torsional vibration modes and frequencies of shafting equivalent model by MATLAB)

求解椭圆型方程生成二维翼型网格，并采用逐线松弛迭代技术求解了二维翼型绕流，这是CFD计算中的典型例子，是cfd初学者的很好的学习例子。(Solving elliptic equations, generating two-dimensional airfoil mesh, and using line relaxation iterative technique to solve the two-dimensional airfoil flow, which is a typical example of CFD calculation, a good example for new CFD learner.)

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)

这是一个三维超混沌离散系统Folded towel函数(Three dimensional hyperchaotic discrete system function)

For the model of indoor air distribution tuyere proposed by Professor Zhang Tengfei, this paper is UDF code for fluent simulation.

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.)

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：  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)

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：  matlab编程利用hess simth面元法(边界元法)计算球体及椭球体附加质量(Matlab programming uses hess_simth surface element method (boundary element method) to calculate the additional mass of spheres and ellipsoids)