yxtjfqiujie

有直接法,间接法,Bartlett法,Welch法(有????? ????? Bartlett ? Welch )

新建复数类进行复数运算，重载+、=+、*、/等运算符用于复数间的运算。(New complex class complex operation, overloading+ =+,*,/operator for computing the plural.)

c语言程序编写在经验模态分解，包含三次样条(c language programming in the empirical mode decomposition, contains the cubic spline)

计算流体动力学中湍流模型的源程序，代码十分宝贵(Computational fluid dynamics model of the source of turbulence, the code is very valuable)

说明：  1. 常用的数值积分方法(特别是梯形法、Simpson方法、 Cotes公式、Romberg算法以及Gauss 求积公式)的原理； 2. 复合梯形公式，复合Simpson公式，Romberg算法的程序(1. Commonly used numerical integration methods (especially trapezoid method, Simpson method Cotes formula, Romberg algorithm and Gauss quadrature formula); 2. Program of compound trapezoid formula, compound Simpson formula and Romberg algorithm)

用谱方法计算流体力学一些流动现象的整体稳定性,利用自然梯度算法，包括四元数的各种计算。( Spectral methods of computational fluid dynamics flow of some of the overall stability of the phenomenon, Use of natural gradient algorithm, Including quaternion various calculations.)

最简单的一个vumat子程序，不同温度对应不用屈服，包含应力更新(The simplest VUMAT subroutine does not yield to different temperatures, including stress updates.)

说明：  用matlab实现的有限元工具箱，有平面空间梁单元，杆单元，实体单元等。(achieved using Matlab Toolbox FEM, graphic space beam elements, rod elements, entities modules.)

MATLAB，多目标优化，使用SQP算法(MATLAB, multi-objective optimization using SQP Algorithm)

关于齿轮设计的程序，计算齿轮传动尺寸，求得变位齿轮计算数据，齿轮副啮合角和渐开线函数值，几何尺寸(the program was used to caculate gear)