Field_ampl_analy

利用ARIMA处理分析时间序列，计算数列相关性和数字特征并通过计算所得值进行一定范围的预测(ARIMA processing analysis time sequence, to calculate a number of columns and digital characterized by the calculated value for a certain range of the prediction)

学习用UMAT程序，用于abaqus隐式计算的Johnson-cook模型，有所修改(Learn UMAT program for abaqus Johnson-cook implicit calculation model, some modifications)

有限元计算软件Abaqus USDFLD子程序在复合材料中强度分析中的应用。(Finite element analysis software Abaqus USDFLD subroutine in the composite material strength analysis applications.)

很好用的有关矩阵的各种操作，包括求逆，特征值，特征向量，svd分解等(good part of the matrix of various operations including inverse, eigenvalues, eigenvectors, svd decomposition, etc.)

说明：  常用算法的c语言实现，包括一些经典的比如，最小二乘，插值与逼近等等！(Commonly used algorithm c language, including some classic example, least squares, interpolation and approximation, etc.!)

代码为偏最小二乘法计算过程的代码，主要部分都有中文解释(Code for the calculation process of partial least squares method)

MDVRP_遗传算法 可以运行 希望对大家有帮助(a solution to MDVRP ,i hope it can help you)

考普森教授在这本书中，使用经典的分析方法，给出了严谨的一阶和二阶线性偏微分方程理论方面的知识。(in this book， professor copson gives a rigorous account of the theory of partial differential equations of the first order and of linear partial differential equations of the second order， using the methods of classical analysis.)

利用五点差分格式和Jacobi迭代法，求解精确解和数值解的误差，判断阶数是否正确(Five-point difference scheme and Jacobi iteration method are used to solve the error between exact solution and numerical solution and to judge whether the order is correct or not.)

采用离散的数值方法，通过坐标转换并生成贴体网格系统，计算轴对称喷管流场(Discrete numerical methods, through coordinate transformation and generate body-fitted grid system, calculating axisymmetric nozzle flow)