fitness

umat公式详细介绍，我也不知道够20字了mei(the introduction of umat in abaqus)

最小二乘法含有非线性线性拟合附有理论和实际的例子说明比较具有实际应用哟(PLS)

说明：  本文为JC法程序，用于计算结构的可靠度指标。(JC method for structure reliablibity.)

说明：  计算混沌系统的lyapunov指数和poincare截面(Calculation of chaotic systems lyapunov index and cross-section poincare)

支持向量机作为统计学习理论的实现方法，能很好地解决非线性和高维数问题，克服了神经网络方法收敛慢、解不稳定、推广性差的缺点，近年来得到了广泛地研究，在模式识别、信号处理、控制、通讯等方面得到了广泛地应用。(Support Vector Machine as the implementation of statistical learning theory approach, can be a good solution to the nonlinear and high dimension problem, the neural network method to overcome the slow convergence, solution instability, bad promotion of sexual shortcomings, in recent years has been widely studied, at pattern recognition, signal processing, control, communications, etc. has been widely applied.)

基于Levenberg-Marquardt的曲线/面拟合(C library for Levenberg-Marquardt least-squares minimization and curve fitting)

说明：  CZT和FFT的C语言实现代码，能有效滤除谐波，噪声。获得信号的频率，是一种良好的频率测量算法。(CZT and FFT of the C language code, can effectively filter out harmonics and noise. Access to the signal frequency, is a good algorithm for frequency measurement.)

有限元法利用铁摩辛柯梁计算转轴质量刚度阻尼矩阵(Finite element method using the Timoshenko beam to calculate the stiffness and damping matrix of the shaft quality)

关于焊接残余应力的Abaqus子程序-DFLUX(The Abaqus subprogram-DFLUX on welding residual stress)

说明：  应用龙格库塔算法求解动力学微分方程，求解时域数据(Solving dynamic differential equation with Runge Kutta algorithm)