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学习用UMAT程序，用于abaqus隐式计算的Johnson-cook模型，有所修改(Learn UMAT program for abaqus Johnson-cook implicit calculation model, some modifications)

算符优先的计算器，用于编译原理的课程作业(caculator for opp)

说明：  利用四阶龙格库塔求解微分方程，并给出方程实例。(The fourth order Runge Kutta is used to solve the differential equation and an example is given.)

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

有限元方法和计算流体力学的经典教材，内容很不错(Finite Element Method- Fluid Dynamics- Zienkwicz and Taylor)

说明：  短时傅里叶变换及短时傅里叶反变换的实现，简单可用(The realization of short-time Fourier transform and short-time Fourier inverse transform is simple and available)

说明：  在matlab环境下能进行各种曲线拟合的算法，非常好。(In the matlab environment to conduct various kinds of curve fitting algorithms, very good.)

用蒙特卡洛模拟的方法计算美式期权的价格以及基本描述,能量熵的计算，sar图像去噪的几种新的方法。( Monte Carlo simulation method of calculating the American option price and basic description, Energy entropy calculation, Several new methods sar image denoising.)

matlab环境下，克里金插值中用回归方法和线性方法拟合出的球状模型的系数。(Kriging the spherical model coefficients using regression fitting in matlab.)

C++实现的FFT，详细，简单，内含多个测试类(using C++ implements fft，including serials class)