fitqr

本程序用于生成高质量的网格，可用于有限元，有限体积等方法的前处理。(This procedure is used to generate high-quality mesh, can be used for finite element, finite volume methods such as pre-processing.)

施威德勒球壳在ansys中的建模分析，APDL语言(Of Schwedler shell modeling in ansys, APDL language)

MAYLAB语言编写柯林斯公式的S-FFT及D-FFT计算程序，请读者自行根据需要修改(MAYLAB language Collins formula S-FFT and D-FFT calculation program, the reader according to their needs modification)

求解转子系统前三个临界转速和主振型的传递矩阵法 (Calculation of critical speed)

branchbound就是所谓的分支定界算法，应用于动态规划解决实际问题(branchbound is called the branch and bound algorithm applied to the dynamic programming to solve practical problems)

附件中是我用Fortran写的lorenz混沌吸引子的lyapunov指数谱产生程序。包括三部分内容：如何产生lorenz吸引子，详细注释，如何计算lyapunov指数谱。 需要的话也可以单独提取子程序中的四阶龙格库塔算法。 希望有所用。(Annex is written in Fortran I used the Lorenz chaotic attractor of lyapunov index spectrum generation process. Includes three parts: how to generate Lorenz attractor, detailed notes, how to calculate the spectrum lyapunov index. If necessary, extraction can also be a separate subroutine in the fourth-order Runge-Kutta algorithm. Would like to see used.)

fortran90程序，运用Runge-Kutta法数值求解常微分方程的程序，非常适用，包括源代码、一个算例和输出程序(fortran90 procedures, the use of Runge-Kutta method for numerical solution of ordinary differential equations of the process, is very applicable, including source code, a numerical example and output procedures)

该函数用来计算任意函数的一阶偏导数(数值方法),使用大量的有限元法求解偏微分方程，基于kaiser窗的双谱线插值FFT谐波分析。( This function is used to calculate the arbitrary function of the first order partial derivative (numerical methods), Using a large number of finite element method to solve partial differential equations, Dual-line interpolation FFT harmonic analysis kais)

方柱绕流Lattice boltzman method(rectangular pillar LBM )

奇异值能量差分谱计算，可用于信号降噪处理(Singular value of the energy difference spectrum calculation can be used for signal noise reduction)