FFT_16pt

说明：  satellite-tracking-opensource

说明：  umat abaqus plasticity

计算流体力学讲义（基础篇） 任玉新（清华大学工程力学系 流体力学研究所）(The computational fluid dynamics notes (foundation article))

由散点插值生成等值线,并且提供颜色选择工具,共有三种插值方法(Generating isolines from scattered interpolation and providing a color selection tool, there are three interpolation methods)

分析两时间序列之间的超前和之后关系，计算滞时长度，多用于水文气象方面分析研究(Analysis ahead of and after the relationship between the two time series, calculating the lag length, used for the analysis of hydrometeorological)

插值、拟合与规划问题 插值、拟合与规划问题(Interpolation, fitting with the planning of interpolation, fitting and planning issues)

是一个基于Fortran语言计算 第一主应力 和 第三主应力 结构数值计算方便的代码(Fortran language is a calculation based on the first principal stress and the third principal stress code structure to facilitate numerical calculation)

最小二乘法的证明及matlab程序，附有文字说明和程序源码(The method of least squares)

共轭梯度法（Conjugate Gradient）是介于最速下降法与牛顿法之间的一个方法，它仅需利用一阶导数信息，但克服了最速下降法收敛慢的缺点，又避免了牛顿法需要存储和计算Hesse矩阵并求逆的缺点，共轭梯度法不仅是解决大型线性方程组最有用的方法之一，也是解大型非线性最优化最有效的算法之一(Conjugate gradient method (Conjugate Gradient) is between the steepest descent method and Newton' s method between a method that takes only a first derivative information, but to overcome the slow convergence of the steepest descent method shortcomings, but also avoid the need to store Newton and computing the inverse Hesse matrix and disadvantages, conjugate gradient method is not only to solve large linear equations of the most useful methods, large-scale nonlinear optimization solution is the most efficient algorithms)

有限元法求解泊松方程，用matlab编写的计算程序(Finite element method for solving Poisson)