luoxuanjiang

Compute isotherms in quad

说明：  一般的最小二乘通常是一次拿到全部的数据， 对所有数据进行统一优化计算得到模型系数。递推最小二乘是以一种递推的方式计算最小二乘，每次使用最新的测量值，来不断更新模型系数。(General least squares usually get all the data at one time, and perform unified optimization calculations on all the data to get the model coefficients. Recursive least squares is to calculate the least squares in a recursive way, each time the latest measured value is used to continuously update the model coefficients.)

说明：  本程序是AR(2)模型进行数据建模，再进行kalman滤波，进行数据去躁处理，尤其用在光纤陀螺上(AR (2) model for data modeling, further Kalman filtering, data processing to impatient, especially with the fiber gyro)

thermal damage abaqus-umat subroutine

用牛顿法解非线性方程组(包括论文及源程序)(with Newton method for solving systems of nonlinear equations (including papers and source))

Echo cancellation using NLMS adaptive filter

该程序通过编写fortran，得到abaqus之程序usdfld，并实例分析。(The program is by writing fortran, get abaqus procedures usdfld, and case analysis.)

说明：  fast fourier transformation

说明：  分数傅里叶变换程序，这个是二维分数阶傅里叶变化程序。(Fractional Fourier transform procedure, this is a two-dimensional fractional Fourier change process.)

说明：  大名鼎鼎的burges 方程的Fortran语言程序。Burges方程式源项为零的NS方程，在某些情况下市很有用的。(Famous burges equation Fortran language program. Burges equation source term to zero NS equations, in some cases, city, very useful.)