thin_film_N_K_T

说明：  计算两组向量之间的旋转矩阵。输入参数为在两个不同坐标系中的同名向量（模为1），返回参数是一个3X3的旋转矩阵。(The function of RM realize the rotation between two sets of vectors, whose magnitude are 1, defined in two different refrence frames. Input parameters are two sets of vectors r and b, return value is a rotaton matrix.)

最速下降法就是梯度下降法,可以用于求解最小二乘问题(线性和非线性都可以)。可以说是求解机器算法的最古老、最经典的模型，另一种常用的方法是最小二乘法。(The steepest descent method is the gradient descent method, which can be used to solve the least squares problem (both linear and non-linear). It can be said that it is the oldest and most classical model for solving machine algorithm. Another commonly used method is the least square method.)

AHP层次分析法计算判断矩阵的最大特征值,使用高阶累积量对MPSK信号进行调制识别，包括四元数的各种计算。( Calculate the maximum eigenvalue judgment matrix of AHP, Using high-order cumulants of MPSK signal modulation recognition, Including quaternion various calculations.)

进行了简支梁荷载作用下的变形计算，将梁分成了40个单元，分别用Euler Bernoulli和Timoshenko 梁进行了对比计算(Was calculated deformation under loads simply supported beam, the beam is divided into 40 units, respectively Euler Bernoulli and Timoshenko beam compared calculated)

说明：  FDTD的3D源程序,PEC边界,比较详细(FDTD the 3D source, PEC boundary, a more detailed)

利用5阶WENO有限差分法求解一维Euler方程组，给出求解Sod型激波管问题的详细程序。(The use of 5-order WENO finite difference method for solving one-dimensional Euler equations given type of shock tube problem solving Sod detailed procedures.)

说明：  移动最小二乘法程序，用MATLAB编写的函数形式，直接可以调用(Moving Least Square Method)

利用地震方位属性进行反演，获得各向异性强度和方位参数；同时对计算结果进行归一统计性处理。(Property inversion, seismic orientation anisotropy and orientation parameters and normalized statistical processing of the calculation results at the same time.)

用python写的牛顿迭代法和牛顿插值法，数值分析的实验(Newton iteration method and Newton interpolation method written in Python, numerical analysis experiment.)

用矩量法(电场结合磁场积分方程)算金属圆柱散射(Using the method of moments (electric field integral equation combined) considered the scattering of metal cylinder)