fft_change

wrfchem排放源编辑程序。适合于美国地区，用的时候注意更改目录(wrfchem source editing program. Suitable areas in the United States, with the time to pay attention to change directories)

A summary of UEL and UMAT

给出了高斯消元的代码，和程序页面，方便快捷(The code and program page of Gauss elimination are given, which is convenient and quick.)

线弹性模型，可以对一般的弹性体通过abaqus进行验证使用(Linear elastic model)

matlab编写的流体力学计算和传热计算程序，一些例子，主要用于流体力学计算和传热的计算，为设计实例(Matlab prepared by the computational fluid dynamics and heat transfer calculation procedures, some examples, mainly used for computational fluid dynamics and heat transfer calculation for the design example)

先通过emd进行分解，然后求出边际谱，进行分析(First, the EMD is decomposed, and then the marginal spectrum is obtained)

摄影测量学中单像空间后方交会程序，matlab完成矩阵运算，程序简洁实用！(Photogrammetry single resection procedures such as space, matlab complete the matrix calculation, the program simple and practical!)

frictional model to analysis in abaqus, a good subroutine to build a new frictional relationship

该程序为全向比幅法测角程序，并给出了测角误差分析(The program is omnidirectional amplitude ratio angle measuring program, and the angle error analysis is given)

用切比雪夫多项式逼近已知函数 用勒让德多项式逼近已知函数 用帕德形式的有理分式逼近已知函数 用列梅兹算法确定函数的最佳一致逼近多项式 求已知函数的最佳平方逼近多项式 用傅立叶级数逼近已知的连续周期函数 离散周期数据点的傅立叶逼近 用自适应分段线性法逼近已知函数 用自适应样条逼近（第一类）已知函数 离散试验数据点的多项式曲线拟合 离散试验数据点的线性最小二乘拟合 离散试验数据点的正交多项式最小二乘拟合 (By using Chebyshev polynomial approximation of the known functionApproximation of the known functions by Legendre polynomialsApproximation by rational fraction of known function in the form of PadmaTo determine the best uniform function polynomial approximation with the Lemez algorithmThe best known polynomial square for function approximationContinuous periodic function with Fourier series approximation of the knownApproximation of discrete data points in the Fu Liye cycleApproximation of the known function with adaptive piecewise linear methodAdaptive spline approximation ( first class ) known functionPolynomial curve fitting of discrete data pointsLinear least squares fitting of discrete data pointsOrthogonal polynomial least squares fitting of discrete data points)