stak

用于求解超定方程组最小二乘解，稳定性高，速度快(To get the least square solution of superlattice dislocation.)

Abaqus UMAT code 适用于平面应变，轴对称弹塑性本构关系，也适用于大应变情况，使用显示积分算法。(Abaqus UMAT code applies to plane strain, axisymmetric elastoplastic constitutive relation, also applicable to large strain, using the integration algorithm.)

Mathematica计算基于力平衡变截面梁单元的质量和刚度矩阵(2D force-based finite element mathemaica)

对实际采集的舰船辐射噪声进行了demo谱分析，分别采用了窄带解调和宽带解调两种方式，得到了较清晰的轴频和叶频信息。(use narrow-band and broad-band methods to demodulate the ship-radiated noise which is actually colleted, there can see clear axle frequency and blade frequency in the demo spectrum.)

三维的有限时域差分源程序，边界条件为pml(Three-dimensional FDTD source, boundary conditions for the PML)

预估校正法，关于解分数阶微分方程的算法程序，适合非线性方程(Solves an initial value problem for a non-linear differential equation of fractional order (FDE). The code implements the predictor-corrector PECE method of Adams-Bashforth-Moulton )

面向对象的有限元程序设计。与传统的有限元程序相比，面向对象有限元程序更易于编写、更易于维护和扩充，程序代码的可重用成分更大。(object oriented finite element programming)

最小二乘估计法在直流电机参数估计中的一个应用，在只已知输入输出数据的情况下，就可以获得电机的内部参数。(DC motor parameter estimation least squares estimation method, in the case of known input and output data only, you can get the internal parameters of the motor.)

读取msh文件的C语言接口，支持gambit，ICEM等网格工具绘制的网格(The interface of the MSH file with C language, support the grid drawn by gambit, ICEM and other grid tools.)

ADI method for solving PDE equations